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1

Dispersion serial dilution methods using the gradient diluter device.  

PubMed

A solute aspirated into a prefilled tube of diluent undergoes a dilution effect known as dispersion. Traditionally the effects of dispersion have been considered a negative consequence of using liquid-filled fixed-tip liquid handlers. We present a novel device and technique that utilizes the effects of dispersion to the benefit of making dilutions. The device known as the Gradient Diluter extends the dilution range of practical serial dilutions to six orders of magnitude in final volumes as low as 10??L. Presented are the device, dispersion methods, and validation tests using fluorescence detection of sulforhodamine and the high-performance liquid chromatography/ultraviolet detection of furosemide. In addition, a T-cell inhibition assay of a relevant downstream protein is used to demonstrate IC(50) curves made with the Gradient Diluter compare favorably with those generated by hand. PMID:22364546

Walling, Leslie; Schulz, Craig; Johnson, Michael

2012-12-01

2

General Equation for the Serial Dilution Technique in Microbiological Assays  

Microsoft Academic Search

THE basis of the serial dilution technique is a comparison of a solution of the sample of material under test with a solution of a standard sample of known strength. In order to make the comparison, serial dilutions of both the standard and test solutions must be made; in cases where the potency (or purity) is roughly known to start

A. M. Wild

1947-01-01

3

Implementing Inquiry-Based Learning in Teaching Serial Dilutions  

ERIC Educational Resources Information Center

The 5E model of inquiry-based learning was incorporated into a sophomore-level microbiology laboratory to increase student understanding of serial dilutions, a concept that is often difficult for most students to comprehend. Quantitative and qualitative assessments were conducted during the semester to determine the value of this approach for…

Walker, Candace L.; McGill, Michael T.; Buikema, Arthur L., Jr.; Stevens, Ann M.

2008-01-01

4

Conductometric studies of the serially diluted and agitated solutions on an anomalous effect that depends on the dilution process  

Microsoft Academic Search

We analysed the experimental data related to the specific conductivities of several serially diluted and agitated solutions (SDA for short). The experimental procedure consisted in measuring the specific conductivity, ? (?S cm?1), of samples of SDA we prepared several months before. After characterizing the SDA, we diluted them with twice distilled water at several ratio of dilution, ranging from 1:1

V. Elia; L. Elia; M. Montanino; E. Napoli; M. Niccoli; L. Nonatelli

2007-01-01

5

Biometrics 60, 407417 Bayesian Analysis of Serial Dilution Assays  

E-print Network

laboratory data on cockroach allergens measured in house dust samples. Our estimates are much more accurate of measurements versus dilutions from a single plate (assays of the cockroach allergen Bla g1), for the standards

Gelman, Andrew

6

Conductometric and calorimetric studies of the serially diluted and agitated solutions  

Microsoft Academic Search

We systematically analysed the experimental data related to the specific conductivities and heats in excess of several serially\\u000a diluted and agitated solutions (SDA for short). For all of the analysed samples, we found that both the excess conductivity,\\u000a ?E (?S cm?1), and excess heat, Q\\u000a mixE (J kg?1), varied with the age of the sample (up to 2 years of

P. Belon; V. Elia; L. Elia; M. Montanino; E. Napoli; M. Niccoli

2008-01-01

7

Critical Review and Meta-Analysis of Serial Agitated Dilutions in Experimental Toxicology  

Microsoft Academic Search

1 We conducted an overview and quantitative meta-analysis of all experimental literature on the protective effects of serial agitated dilutions (SADs) of toxin preparations.2 Articles were systematically collected and evaluated for scientific quality using pre-defined methodological criteria and then independently analysed for validity.3 We found 105 publications exploring the effects of SAD preparations in toxicological systems.4 The quality of evidence

Klaus Linde; Wayne B. Jonas; Dieter Melchart; Felege Worku; Hildebert Wagner; Florian Eitel

1994-01-01

8

Research and Teaching: Implementing Inquiry-Based Learning in Teaching Serial Dilutions  

NSDL National Science Digital Library

The 5E model of inquiry-based learning was incorporated into a sophomore-level microbiology laboratory to increase student understanding of serial dilutions, a concept that is often difficult for most students to comprehend. Quantitative and qualitative assessments were conducted during the semester to determine the value of this approach for students; it was most beneficial to the middle 50% of the class.

Ann M. Stevens

2008-07-01

9

Differences in Median Ultraviolet Light Transmissions of Serial Homeopathic Dilutions of Copper Sulfate, Hypericum perforatum, and Sulfur  

PubMed Central

Homeopathic remedies are produced by potentising, that is, the serial logarithmic dilution and succussion of a mother tincture. Techniques like ultraviolet spectroscopy, nuclear magnetic resonance, calorimetry, or thermoluminescence have been used to investigate their physical properties. In this study, homeopathic centesimal (c) potencies (6c to 30c) of copper sulfate, Hypericum perforatum, and sulfur as well as succussed water controls were prepared. Samples of these preparations were exposed to external physical factors like heat, pressure, ultraviolet radiation, or electromagnetic fields to mimic possible everyday storage conditions. The median transmissions from 190?nm to 340?nm and 220?nm to 340?nm were determined by ultraviolet light spectroscopy on five measurement days distributed over several months. Transmissions of controls and potencies of sulfur differed significantly on two of five measurement days and after exposure to physical factors. Transmissions of potencies exposed to ultraviolet light and unexposed potencies of copper sulfate and Hypericum perforatum differed significantly. Potency levels 6c to 30c were also compared, and wavelike patterns of higher and lower transmissions were found. The Kruskal-Wallis test yielded significant differences for the potency levels of all three substances. Aiming at understanding the physical properties of homeopathic preparations, this study confirmed and expanded the findings of previous studies. PMID:23401712

Klein, Sabine D.; Sandig, Annegret; Baumgartner, Stephan; Wolf, Ursula

2013-01-01

10

Stability of two-fold screw axis structures for cellulose  

Technology Transfer Automated Retrieval System (TEKTRAN)

Diffraction crystallography indicates that most forms of crystalline cellulose have two-fold screw axis symmetry. Even if exact symmetry is absent, the degree of pseudo symmetry is very high. On the other hand, this symmetry leads to short contacts between H4 and H1' across the glycosidic linkage....

11

Sex Is Always Well Worth Its Two-Fold Cost  

PubMed Central

Sex is considered as an evolutionary paradox, since its positive contribution to Darwinian fitness remains unverified for some species. Defenses against unpredictable threats (parasites, fluctuating environment and deleterious mutations) are indeed significantly improved by wider genetic variability and by positive epistasis gained by sexual reproduction. The corresponding evolutionary advantages, however, do not overcome universally the barrier of the two-fold cost for sharing half of one's offspring genome with another member of the population. Here we show that sexual reproduction emerges and is maintained even when its Darwinian fitness is twice as low as the fitness of asexuals. We also show that more than two sexes (inheritance of genetic material from three or even more parents) are always evolutionary unstable. Our approach generalizes the evolutionary game theory to analyze species whose members are able to sense the sexual state of their conspecifics and to adapt their own sex consequently, either by switching or by taxis towards the highest concentration of the complementary sex. The widespread emergence and maintenance of sex follows therefore from its co-evolution with the even more widespread environmental sensing abilities. PMID:19582152

Feigel, Alexander; Englander, Avraham; Engel, Assaf

2009-01-01

12

Serial Wars  

ERIC Educational Resources Information Center

In a year filled with drama and hyperbole, the serials marketplace churned toward a future whose shape is the subject of fierce debate. Forecasts from commercial publishers touting collapse and disaster seemed oddly out of sync with the profits they enjoyed--around 25 percent on average. Nevertheless, in a market where prices continued to rise and…

Van Orsdel, Lee C.; Born, Kathleen

2007-01-01

13

Sea Urchin Embryology: Simple Dilutions 2  

NSDL National Science Digital Library

SUMMARY: Building on what was learned in SIMPLE DILUTION, students will determine the best dilution strategy to solve a dilution problem. 1. Students are given an unknown dye solution and asked to determine its concentration by comparing it with standards they create. 2. Repeated "serial" dilutions will be necessary to determine accurate concentration readings. 3. Varying the color of the filters and the path length will aid in seeing lower concentrations.

PhD David Epel (Stanford U. Hopkins Marine Station)

2006-12-20

14

UltimaSerial  

NSDL National Science Digital Library

UltimaSerial is a Windows based controller for DATAQ Instrument's DI-1xx serial data acquisition device, or WinDaq Starter Kit. It includes access to analog inputs, digital inputs, event counters, various trigger modes, and is backward compatible with the DataqSerial ActiveX control. UltimaSerial comes sample code in a range of languages.

Ultimaserial

2003-10-10

15

Wildlife Conservation Serials  

Microsoft Academic Search

The changing philosophy concerning wildlife conservation and its impact on the scientific literature is considered in order to define the serials relevant to this topic. These serials are presented in an annotated bibliography. which n compiled from lists of serials shown to be relevant as a result of three analyses of the literature. These analyses include a study of serials

Vernon N. Kisling Jr; Stephanie Haas

1994-01-01

16

Evaluation of two-fold fully conditional specification multiple imputation for longitudinal electronic health record data  

PubMed Central

Most implementations of multiple imputation (MI) of missing data are designed for simple rectangular data structures ignoring temporal ordering of data. Therefore, when applying MI to longitudinal data with intermittent patterns of missing data, some alternative strategies must be considered. One approach is to divide data into time blocks and implement MI independently at each block. An alternative approach is to include all time blocks in the same MI model. With increasing numbers of time blocks, this approach is likely to break down because of co-linearity and over-fitting. The new two-fold fully conditional specification (FCS) MI algorithm addresses these issues, by only conditioning on measurements, which are local in time. We describe and report the results of a novel simulation study to critically evaluate the two-fold FCS algorithm and its suitability for imputation of longitudinal electronic health records. After generating a full data set, approximately 70% of selected continuous and categorical variables were made missing completely at random in each of ten time blocks. Subsequently, we applied a simple time-to-event model. We compared efficiency of estimated coefficients from a complete records analysis, MI of data in the baseline time block and the two-fold FCS algorithm. The results show that the two-fold FCS algorithm maximises the use of data available, with the gain relative to baseline MI depending on the strength of correlations within and between variables. Using this approach also increases plausibility of the missing at random assumption by using repeated measures over time of variables whose baseline values may be missing. PMID:24782349

Welch, Catherine A; Petersen, Irene; Bartlett, Jonathan W; White, Ian R; Marston, Louise; Morris, Richard W; Nazareth, Irwin; Walters, Kate; Carpenter, James

2014-01-01

17

Greg Anderson Bates College click here How to Make Simple Solutions and Dilutions !  

E-print Network

NOTE:.. Greg Anderson Bates College click here How to Make Simple Solutions and Dilutions ! ! Unit # ' 0 ! # ' 9 #12;!# ' 7 ! ! ! .4 #.' ! 8 #.' ! 7 :4 0 0 0 0 # 4 3. Serial Dilution.. serial dilution. Making fixed volumes of specific concentrations from liquid reagents: V1C1=V2C2.. C D + ! + e g , + . V

Ray, David

18

Star Formation in One and Two-Fold Resonance Ring Galaxies  

NASA Astrophysics Data System (ADS)

Resonance rings of star formation are a common phenomenon of early type barred spiral galaxies. Rings form by gas cloud gravitational coelesence near resonances with a turning perturbation. The resulting bright stars trace out the rings. We show how to use the Byrd et al. (1998) analytic formulation to model two-fold resonance rings with an example, NGC 3081. We obtain bar strength, orientation, and pattern speed reproducing the observed shapes and radial velocities. We show that an additional type, a one-fold resonance ring, can be produced by lop-sided perturbations. We identify shape, star formation, and velocity signatures of one-fold versus two-fold rings. As an example, we model the one-fold ring of NGC 4622. We study star formation in rings in more detail. Age of associations can be predicted as a function of angle around the ring. Correlating with observed colors or other age indicators permits empirical calibration of the indicator to study star formation and the ages of stellar complexes in other galaxies. Acknowledgements: T. Freeman and G. Byrd were supported by NSF grant 9802918. D. Ousley was supported by a Univerisyt of Alabama Mc Wane Undergraduate Research Fellowship. We thank R. But and G. Purcell for observational data on NGC 3081.

Freeman, T.; Byrd, G.; Ousley, D.; Domingue, D.

2000-05-01

19

Automated Serials Control System.  

ERIC Educational Resources Information Center

In 1967, the New York State Library at Albany (NYSL) developed a tape-oriented, off-line serials control system for 10,000 active titles. The system would perform all the serials control functions: bibliographic control, check-in of current receipts, claiming for gaps in receipts and late issues, binding notification for completed sets,…

Pan, Elizabeth

20

21 CFR 866.2500 - Microtiter diluting and dispensing device.  

Code of Federal Regulations, 2014 CFR

...HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES IMMUNOLOGY AND MICROBIOLOGY DEVICES Microbiology... A microtiter diluting and dispensing device is a mechanical device intended for medical purposes to dispense or serially...

2014-04-01

21

21 CFR 866.2500 - Microtiter diluting and dispensing device.  

Code of Federal Regulations, 2012 CFR

...HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES IMMUNOLOGY AND MICROBIOLOGY DEVICES Microbiology... A microtiter diluting and dispensing device is a mechanical device intended for medical purposes to dispense or serially...

2012-04-01

22

HIPPI/Serial-HIPPI  

SciTech Connect

The High-Performance Parallel Interface (HIPPI) is a simple high-performance, point-to-point channel for transmitting digital data at peak data rates of 800 or 1600 Mbit/S. The transmission distance between data processing equipment using copper cabling can be up to 25 meters. This distance may be increased by using a Serial-HIPPI extender. This paper describes the HIPPI channel, the choices considered for a serial extender, and the resulting agreement for the Serial-HIPPI specification. 5 refs., 4 figs.

Tolmie, D.E. (Los Alamos National Lab., NM (United States)); Halvorson, M.G. (Digital Equipment Corp., Los Alamos, NM (United States))

1991-01-01

23

Standards for Serial Holdings and for Serials Data in the Serials Analytic Record  

E-print Network

Standards for Serial Holdings and for Serials Data in the Serials Analytic Record by Alan Hopkinson or not, issued in successive parts usually having numerical or chronological designations and intended

Carr, Leslie

24

Biomathematical modeling for diluted drugs.  

PubMed

Several workers have proven that succussed ultra high dilution of a drug molecule in water or alcoholic medium, even exceeding Avogadro number, can bring forth noticeable physiological changes of an organism. Homeopathic drugs are prepared by dissolving such drug ingredients in distilled water and then the solution is centesimally diluted serially by ethanol. A mathematical model has been proposed by the present worker, which explains why the drug does not become non-molecular even in ultra-high dilution. This is due to loss of homogeneity in the solution, caused by increase of dielectric constant of the medium during the process of potentization. Facilitated binding of the drug molecules with minute physiologically important protein factors may be the cause of visible physiological alterations. PMID:12781641

Chattopadhyay, S

2003-07-01

25

Serial Subtraction Errors Revealed  

E-print Network

A fine-grained analysis of errors and their frequency during the performance of a mental multi-digit serial subtraction task reveals the cognitive processes most prone to failure. Example serial subtraction problems from the experimental problem set are utilized in illustrating different types of errors and their probable causes. A list of considerations is presented for future descriptive and computational modeling of the errors committed during performance of the task.

Sue E. Kase; Frank E. Ritter; Michael Schoelles

26

Dilution Confusion: Conventions for Defining a Dilution  

ERIC Educational Resources Information Center

Two conventions for preparing dilutions are used in clinical laboratories. The first convention defines an "a:b" dilution as "a" volumes of solution A plus "b" volumes of solution B. The second convention defines an "a:b" dilution as "a" volumes of solution A diluted into a final volume of "b". Use of the incorrect dilution convention could affect…

Fishel, Laurence A.

2010-01-01

27

Stress in Harmonic Serialism  

ERIC Educational Resources Information Center

This dissertation proposes a model of word stress in a derivational version of Optimality Theory (OT) called Harmonic Serialism (HS; Prince and Smolensky 1993/2004, McCarthy 2000, 2006, 2010a). In this model, the metrical structure of a word is derived through a series of optimizations in which the "best" metrical foot is chosen…

Pruitt, Kathryn Ringler

2012-01-01

28

A mixed finite element method for nonlinear elasticity: two-fold saddle point approach and a-posteriori error estimate  

Microsoft Academic Search

Summary.   We extend the applicability of stable mixed finite elements for linear plane elasticity, such as PEERS, to a mixed variational\\u000a formulation of hyperelasticity. The present approach is based on the introduction of the strain tensor as a further unknown,\\u000a which yields a two-fold saddle point nonlinear operator equation for the corresponding weak formulation. We provide the uniqueness of solution

Mauricio A. Barrientos; Gabriel N. Gatica; Ernst P. Stephan

2002-01-01

29

Management of Serials in Libraries.  

ERIC Educational Resources Information Center

This volume reviews current options for handling serials problems and clarifies fundamental issues in one of the greatest challenges confronting today's library and information science professionals. Focusing on the management of serials in libraries and the role of serials in scholarly communications, this book combines descriptive and…

Nisonger, Thomas E.

30

Application of multiple imputation using the two-fold fully conditional specification algorithm in longitudinal clinical data  

PubMed Central

Electronic health records of longitudinal clinical data are a valuable resource for health care research. One obstacle of using databases of health records in epidemiological analyses is that general practitioners mainly record data if they are clinically relevant. We can use existing methods to handle missing data, such as multiple imputation (mi), if we treat the unavailability of measurements as a missing-data problem. Most software implementations of MI do not take account of the longitudinal and dynamic structure of the data and are difficult to implement in large databases with millions of individuals and long follow-up. Nevalainen, Kenward, and Virtanen (2009, Statistics in Medicine 28: 3657–3669) proposed the two-fold fully conditional specification algorithm to impute missing data in longitudinal data. It imputes missing values at a given time point, conditional on information at the same time point and immediately adjacent time points. In this article, we describe a new command, twofold, that implements the two-fold fully conditional specification algorithm. It is extended to accommodate MI of longitudinal clinical records in large databases. PMID:25420071

Welch, Catherine; Bartlett, Jonathan; Petersen, Irene

2014-01-01

31

Serial Code Optimization  

NSDL National Science Digital Library

This guide presents the main features of serial optimisation for computationally intensive codes with a focus on the HECToR computing resources. From a user point of view, two main avenues can be followed when trying to optimise an application. One type of optimisations DO NOT involve modifying the source code (modification may not be desirable); optimisation consists of searching for the best compiler, set of flags and libraries. Another type of optimisations DO involve modifying the source code; in the first instance the programmer must evaluate if a new algorithm is necessary, followed by writing or rewriting optimised code. According to the these choices this guide presents optimisation as a problem of compiler and library selection, followed by a presentation of the key factors that must be considered when writing numerically intensive code.

32

Serials Cancellation Project. Final Report.  

ERIC Educational Resources Information Center

A serials cancellation pilot project was conducted by the Pittsburgh Regional Library Center (PRLC) from August 1981 to December 1983 in order to demonstrate the utility of using a large online union list of serials for making and reporting collection management decisions. A total of 21 academic libraries and one public library from Pennsylvania,…

Carter, Ruth C.; Bruntjen, Scott

33

International marketing serials: a retrospective  

Microsoft Academic Search

The content of selected international marketing serials, published from 1985 to 1998, is examined. Results show that the authors published in these serials tend to be affiliated with marketing departments, senior professors, male, and work with a single co-author. Articles often focus on export and import, promotion, consumer behavior, and country of origin. Empirical studies – often survey research based

Michael R. Hyman; Zhilin Yang

2001-01-01

34

A bit serial sequential circuit  

NASA Technical Reports Server (NTRS)

Normally a sequential circuit with n state variables consists of n unique hardware realizations, one for each state variable. All variables are processed in parallel. This paper introduces a new sequential circuit architecture that allows the state variables to be realized in a serial manner using only one next state logic circuit. The action of processing the state variables in a serial manner has never been addressed before. This paper presents a general design procedure for circuit construction and initialization. Utilizing pass transistors to form the combinational next state forming logic in synchronous sequential machines, a bit serial state machine can be realized with a single NMOS pass transistor network connected to shift registers. The bit serial state machine occupies less area than other realizations which perform parallel operations. Moreover, the logical circuit of the bit serial state machine can be modified by simply changing the circuit input matrix to develop an adaptive state machine.

Hu, S.; Whitaker, S.

1990-01-01

35

The Effect of Dilution on the Structure of Microbial Communities  

NASA Technical Reports Server (NTRS)

To determine how dilution of microbial communities affects the diversity of the diluted assemblage a series of numerical simulations were conducted that determined the theoretical change in diversity, richness, and evenness of the community with serial dilution. The results of the simulation suggested that the effects are non linear with a high degree of dependence on the initial evenness of the community being diluted. A series of incubation experiments using a range of dilutions of raw sewage as an inoculum into sterile sewage was used for comparison to the simulations. The diluted communities were maintained in batch fed reactors (three day retention time) for nine days. The communities were harvested and examined by conventional plating and by molecular analysis of the whole-community DNA using AFLP and T-RFLP. Additional, CLPP analysis was also applied. The effects on richness predicted by the numerical simulations were confirmed by the analyses used. The diluted communities fell into three groups, a low dilution, intermediate dilution, and high dilution group, which corresponded well with the groupings obtained for community richness in simulation. The grouping demonstrated the non-linear nature of dilution of whole communities. Furthermore, the results implied that the undiluted community consisted of a few dominant types accompanied by a number of rare (low abundance) types as is typical in unevenly distributed communities.

Mills, Aaron L.

2000-01-01

36

Serial Network Flow Monitor  

NASA Technical Reports Server (NTRS)

Using a commercial software CD and minimal up-mass, SNFM monitors the Payload local area network (LAN) to analyze and troubleshoot LAN data traffic. Validating LAN traffic models may allow for faster and more reliable computer networks to sustain systems and science on future space missions. Research Summary: This experiment studies the function of the computer network onboard the ISS. On-orbit packet statistics are captured and used to validate ground based medium rate data link models and enhance the way that the local area network (LAN) is monitored. This information will allow monitoring and improvement in the data transfer capabilities of on-orbit computer networks. The Serial Network Flow Monitor (SNFM) experiment attempts to characterize the network equivalent of traffic jams on board ISS. The SNFM team is able to specifically target historical problem areas including the SAMS (Space Acceleration Measurement System) communication issues, data transmissions from the ISS to the ground teams, and multiple users on the network at the same time. By looking at how various users interact with each other on the network, conflicts can be identified and work can begin on solutions. SNFM is comprised of a commercial off the shelf software package that monitors packet traffic through the payload Ethernet LANs (local area networks) on board ISS.

Robinson, Julie A.; Tate-Brown, Judy M.

2009-01-01

37

Pulse shape analysis of a two fold clover detector with an EMD based new algorithm: A comparison  

NASA Astrophysics Data System (ADS)

An investigation of Empirical Mode Decomposition (EMD) based noise filtering algorithm has been carried out on a mirror signal from a two fold germanium clover detector. EMD technique can decompose linear as well as nonlinear and chaotic signals with a precise frequency resolution. It allows to decompose the preamplifier signal (charge pulse) on an event-by-event basis. The filtering algorithm provides the information about the Intrinsic Mode Functions (IMFs) mainly dominated by the noise. It preserves the signal information and separates the overriding noise oscillations from the signals. The identification of noise structure is based on the frequency distributions of different IMFs. The preamplifier noise components which distort the azimuthal co-ordinates information have been extracted on the basis of the correlation between the different IMFs and the mirror signal. The correlation studies have been carried out both in frequency and time domain. The extracted correlation coefficient provides an important information regarding the pulse shape of the ?-ray interaction in the detector. A comparison between the EMD based and state-of-the-art wavelet based denoising techniques has also been made and discussed. It has been observed that the fractional noise strength distribution varies with the position of the collimated gamma-ray source. Above trend has been reproduced by both the denoising techniques.

Siwal, Davinder; Mandal, S.; Palit, R.; Sethi, J.; Garg, R.; Saha, S.; Prasad, Awadhesh; Chavan, P. B.; Naidu, B. S.; Jadhav, S.; Donthi, R.; Schaffner, H.; Adamczewski-Musch, J.; Kurz, N.; Wollersheim, H. J.; Singh, R.

2014-03-01

38

Two-fold odd-even effect in self-assembled nanowires from oligopeptide-polymer-substituted perylene bisimides.  

PubMed

Organic nanowires are important building blocks for nanoscopic organic electronic devices. In order to ensure efficient charge transport through such nanowires, it is important to understand in detail the molecular parameters that guide self-assembly of ?-conjugated molecules into one-dimensional stacks with optimal constructive ?-? overlap. Here, we investigated the subtle relationship between molecular structure and supramolecular arrangement of the chromophores in self-assembled nanowires prepared from perylene bisimides with oligopeptide-polymer side chains. We observed a "two-fold" odd-even effect in circular dichroism spectra of these derivatives, depending on both the number of l-alanine units in the oligopeptide segments and length of the alkylene spacer between chromophore and oligopeptide substituents. Our results indicate that there is a complex interplay between the translation of molecular chirality into supramolecular helicity and the molecules' inherent propensity for well-defined one-dimensional aggregation into ?-sheet-like superstructures in the presence of a central chromophore. Strong excitonic coupling as expressed by the appearance of hypsochromically and bathochromically shifted UV-vis absorptions and strong CD signals was systematically observed for molecules with an odd number of l-alanines in the side chains. The latter derivatives gave rise to nanowires with a significantly higher electron mobility. Our results, hence, provide an important design rule for self-assembled organic nanowires. PMID:24524326

Marty, Roman; Nigon, Robin; Leite, Deborah; Frauenrath, Holger

2014-03-12

39

Serial Input Output  

SciTech Connect

Serial Input/Output (SIO) is designed to be a long term storage format of a sophistication somewhere between simple ASCII files and the techniques provided by inter alia Objectivity and Root. The former tend to be low density, information lossy (floating point numbers lose precision) and inflexible. The latter require abstract descriptions of the data with all that that implies in terms of extra complexity. The basic building blocks of SIO are streams, records and blocks. Streams provide the connections between the program and files. The user can define an arbitrary list of streams as required. A given stream must be opened for either reading or writing. SIO does not support read/write streams. If a stream is closed during the execution of a program, it can be reopened in either read or write mode to the same or a different file. Records represent a coherent grouping of data. Records consist of a collection of blocks (see next paragraph). The user can define a variety of records (headers, events, error logs, etc.) and request that any of them be written to any stream. When SIO reads a file, it first decodes the record name and if that record has been defined and unpacking has been requested for it, SIO proceeds to unpack the blocks. Blocks are user provided objects which do the real work of reading/writing the data. The user is responsible for writing the code for these blocks and for identifying these blocks to SIO at run time. To write a collection of blocks, the user must first connect them to a record. The record can then be written to a stream as described above. Note that the same block can be connected to many different records. When SIO reads a record, it scans through the blocks written and calls the corresponding block object (if it has been defined) to decode it. Undefined blocks are skipped. Each of these categories (streams, records and blocks) have some characteristics in common. Every stream, record and block has a name with the condition that each stream, record or block name must be unique in its category (i.e. all streams must have different names, but a stream can have the same name as a record). Each category is an arbitrary length list which is handled by a 'manager' and there is one manager for each category.

Waite, Anthony; /SLAC

2011-09-07

40

Serials Control Systems on Microcomputers.  

ERIC Educational Resources Information Center

This paper describes seven commercially available microcomputer serials systems in terms of the following functions: cataloging/title entry, searching, check-in, claims, routing, bindery control, duplicates control, financial control, ordering, subscription renewal/payment, vendor records, reports, technical descriptions, costs, and number of…

Leatherbury, Maurice C.

1984-01-01

41

Speaking a Serials Cataloging Tongue  

Microsoft Academic Search

In this session, attended primarily by catalogers, Debora Seys speculated about the evolution of the catalog and cataloging from adding value or meaning to “static materials” to being part of the creation process of Web documents, where meaning itself is in a state of flux. She further described serials cataloging as the transitional stage in this process of evolution, referring

Debora Seys Presenter; Christine W. Blackman Recorder

2001-01-01

42

A Few Aspects of Acquiring Serials  

Microsoft Academic Search

IN THE FAMILY of graphic media, serial publi- cations are brash upstarts of a relatively recent age. Although their 300th anniversary will not occur for another decade, the impact of serials as a medium for the mass dissemination of information to lay- men and specialists alike has been incalculable. The effect of serials on libraries has been no less profound.

ROBERT W. ORR

43

The Serial Process in Visual Search  

ERIC Educational Resources Information Center

The conditions for serial search are described. A multiple target search methodology (Thornton & Gilden, 2007) is used to home in on the simplest target/distractor contrast that effectively mandates a serial scheduling of attentional resources. It is found that serial search is required when (a) targets and distractors are mirror twins, and (b)…

Gilden, David L.; Thornton, Thomas L.; Marusich, Laura R.

2010-01-01

44

Serial dependence in visual perception  

PubMed Central

Visual input often arrives in a noisy and discontinuous stream, owing to head and eye movements, occlusion, lighting changes, and many other factors. Yet the physical world is generally stable—objects and physical characteristics rarely change spontaneously. How then does the human visual system capitalize on continuity in the physical environment over time? Here we show that visual perception is serially dependent, using both prior and present input to inform perception at the present moment. Using an orientation judgment task, we found that even when visual input changes randomly over time, perceived orientation is strongly and systematically biased toward recently seen stimuli. Further, the strength of this bias is modulated by attention and tuned to the spatial and temporal proximity of successive stimuli. These results reveal a serial dependence in perception characterized by a spatiotemporally tuned, orientation-selective operator—which we call a continuity field—that may promote visual stability over time. PMID:24686785

Fischer, Jason; Whitney, David

2014-01-01

45

Serial analysis of gene expression  

Microsoft Academic Search

Serial analysis of gene expression (SAGE) is a method used to obtain comprehensive, unbiased and quantitative gene-expression profiles. Its major advantage over arrays is that it does not require a priori knowledge of the genes to be analyzed and reflects absolute mRNA levels. Since the original SAGE protocol was developed in a short-tag (10-bp) format, several modifications have been made

Min Hu; Kornelia Polyak

2006-01-01

46

The pattern of xylan acetylation suggests xylan may interact with cellulose microfibrils as a two-fold helical screw in the secondary plant cell wall of Arabidopsis thaliana.  

E-print Network

). The homogenate was spun at 2200g to pellet the unbroken cells, cell walls, nuclei and most of the plastids and mitochondria. The supernatant was centrifuged in a SW28 rotor at 100000g for 2 h at 4°C onto an 18% iodixanol cushion. The concentrated microsomes... CONFIDENTIAL The pattern of xylan acetylation suggests xylan may interact with cellulose microfibrils as a two-fold helical screw in the secondary plant cell wall of Arabidopsis thaliana. Journal: The Plant Journal Manuscript ID...

Busse-Wicher, Marta; Gomes, Thiago C. F.; Tryfona, Theodora; Nikolovski, Nino; Stott, Katherine; Grantham, Nicholas J.; Bolam, David N.; Skaf, Munir S.; Dupree, Paul D.

2014-06-02

47

New two-fold integration transformation for the Wigner operator in phase space quantum mechanics and its relation to operator ordering  

Microsoft Academic Search

Using the Weyl ordering of operators expansion formula (Hong-Yi Fan, J. Phys. A 25 (1992) 3443) this paper finds a kind of two-fold integration transformation about the Wigner operator Delta (q',p') (q-number transform) in phase space quantum mechanics, and its inverse where Q, P are the coordinate and momentum operators, respectively. We apply it to study mutual converting formulae among

Hong-Yi Fan

2010-01-01

48

Serial murder by healthcare professionals.  

PubMed

The prosecution of Charles Cullen, a nurse who killed at least 40 patients over a 16-year period, highlights the need to better understand the phenomenon of serial murder by healthcare professionals. The authors conducted a LexisNexis search which yielded 90 criminal prosecutions of healthcare providers that met inclusion criteria for serial murder of patients. In addition we reviewed epidemiologic studies, toxicology evidence, and court transcripts, to provide data on healthcare professionals who have been prosecuted between 1970 and 2006. Fifty-four of the 90 have been convicted; 45 for serial murder, four for attempted murder, and five pled guilty to lesser charges. Twenty-four more have been indicted and are either awaiting trial or the outcome has not been published. The other 12 prosecutions had a variety of legal outcomes. Injection was the main method used by healthcare killers followed by suffocation, poisoning, and tampering with equipment. Prosecutions were reported from 20 countries with 40% taking place in the United States. Nursing personnel comprised 86% of the healthcare providers prosecuted; physicians 12%, and 2% were allied health professionals. The number of patient deaths that resulted in a murder conviction is 317 and the number of suspicious patient deaths attributed to the 54 convicted caregivers is 2113. These numbers are disturbing and demand that systemic changes in tracking adverse patient incidents associated with presence of a specific healthcare provider be implemented. Hiring practices must shift away from preventing wrongful discharge or denial of employment lawsuits to protecting patients from employees who kill. PMID:17199622

Yorker, Beatrice Crofts; Kizer, Kenneth W; Lampe, Paula; Forrest, A R W; Lannan, Jacquetta M; Russell, Donna A

2006-11-01

49

Serial Position Learning in Honeybees  

PubMed Central

Learning of stimulus sequences is considered as a characteristic feature of episodic memory since it contains not only a particular item but also the experience of preceding and following events. In sensorimotor tasks resembling navigational performance, the serial order of objects is intimately connected with spatial order. Mammals and birds develop episodic(-like) memory in serial spatio-temporal tasks, and the honeybee learns spatio-temporal order when navigating between the nest and a food source. Here I examine the structure of the bees’ memory for a combined spatio-temporal task. I ask whether discrimination and generalization are based solely on simple forms of stimulus-reward learning or whether they require sequential configurations. Animals were trained to fly either left or right in a continuous T-maze. The correct choice was signaled by the sequence of colors (blue, yellow) at four positions in the access arm. If only one of the possible 4 signals is shown (either blue or yellow), the rank order of position salience is 1, 2 and 3 (numbered from T-junction). No learning is found if the signal appears at position 4. If two signals are shown, differences at positions 1 and 2 are learned best, those at position 3 at a low level, and those at position 4 not at all. If three or more signals are shown these results are corroborated. This salience rank order again appeared in transfer tests, but additional configural phenomena emerged. Most of the results can be explained with a simple model based on the assumption that the four positions are equipped with different salience scores and that these add up independently. However, deviations from the model are interpreted by assuming stimulus configuration of sequential patterns. It is concluded that, under the conditions chosen, bees rely most strongly on memories developed during simple forms of associative reward learning, but memories of configural serial patterns contribute, too. PMID:19259265

Menzel, Randolf

2009-01-01

50

Nanoflow electrospinning serial femtosecond crystallography  

PubMed Central

An electrospun liquid microjet has been developed that delivers protein microcrystal suspensions at flow rates of 0.14–3.1?µl?min?1 to perform serial femtosecond crystallography (SFX) studies with X-ray lasers. Thermolysin microcrystals flowed at 0.17?µl?min?1 and diffracted to beyond 4?Å resolution, producing 14?000 indexable diffraction patterns, or four per second, from 140?µg of protein. Nanoflow electrospinning extends SFX to biological samples that necessitate minimal sample consumption. PMID:23090408

Sierra, Raymond G.; Laksmono, Hartawan; Kern, Jan; Tran, Rosalie; Hattne, Johan; Alonso-Mori, Roberto; Lassalle-Kaiser, Benedikt; Glöckner, Carina; Hellmich, Julia; Schafer, Donald W.; Echols, Nathaniel; Gildea, Richard J.; Grosse-Kunstleve, Ralf W.; Sellberg, Jonas; McQueen, Trevor A.; Fry, Alan R.; Messerschmidt, Marc M.; Miahnahri, Alan; Seibert, M. Marvin; Hampton, Christina Y.; Starodub, Dmitri; Loh, N. Duane; Sokaras, Dimosthenis; Weng, Tsu-Chien; Zwart, Petrus H.; Glatzel, Pieter; Milathianaki, Despina; White, William E.; Adams, Paul D.; Williams, Garth J.; Boutet, Sébastien; Zouni, Athina; Messinger, Johannes; Sauter, Nicholas K.; Bergmann, Uwe; Yano, Junko; Yachandra, Vittal K.; Bogan, Michael J.

2012-01-01

51

Advances in Serial MSK modems  

NASA Technical Reports Server (NTRS)

Lumped element as well as distributed element networks are used in the Serial MSK (SMSK) modems, for 20-1000 Mbps data rate range applications, whose design and performance characteristics are described. It is noted that the use of baseband conversion filters for the modulator yields good performance in many applications, with typical matched filter designs (structurally simple to implement) causing less than 0.5 dB bit error rate performance degradation. The SMSK modem technique begins with the use of a biphased shift-keyed modulator, and then employs passive filters to obtain the MSK signal.

Ryan, C. R.

1981-01-01

52

Serial turbo trellis coded modulation using a serially concatenated coder  

NASA Technical Reports Server (NTRS)

Serial concatenated trellis coded modulation (SCTCM) includes an outer coder, an interleaver, a recursive inner coder and a mapping element. The outer coder receives data to be coded and produces outer coded data. The interleaver permutes the outer coded data to produce interleaved data. The recursive inner coder codes the interleaved data to produce inner coded data. The mapping element maps the inner coded data to a symbol. The recursive inner coder has a structure which facilitates iterative decoding of the symbols at a decoder system. The recursive inner coder and the mapping element are selected to maximize the effective free Euclidean distance of a trellis coded modulator formed from the recursive inner coder and the mapping element. The decoder system includes a demodulation unit, an inner SISO (soft-input soft-output) decoder, a deinterleaver, an outer SISO decoder, and an interleaver.

Divsalar, Dariush (Inventor); Dolinar, Samuel J. (Inventor); Pollara, Fabrizio (Inventor)

2010-01-01

53

Serial turbo trellis coded modulation using a serially concatenated coder  

NASA Technical Reports Server (NTRS)

Serial concatenated trellis coded modulation (SCTCM) includes an outer coder, an interleaver, a recursive inner coder and a mapping element. The outer coder receives data to be coded and produces outer coded data. The interleaver permutes the outer coded data to produce interleaved data. The recursive inner coder codes the interleaved data to produce inner coded data. The mapping element maps the inner coded data to a symbol. The recursive inner coder has a structure which facilitates iterative decoding of the symbols at a decoder system. The recursive inner coder and the mapping element are selected to maximize the effective free Euclidean distance of a trellis coded modulator formed from the recursive inner coder and the mapping element. The decoder system includes a demodulation unit, an inner SISO (soft-input soft-output) decoder, a deinterleaver, an outer SISO decoder, and an interleaver.

Divsalar, Dariush (Inventor); Dolinar, Samuel J. (Inventor); Pollara, Fabrizio (Inventor)

2011-01-01

54

950 keV X-Band Linac For Material Recognition Using Two-Fold Scintillator Detector As A Concept Of Dual-Energy X-Ray System  

SciTech Connect

One of the advantages of applying X-band linear accelerator (Linac) is the compact size of the whole system. That shows us the possibility of on-site system such as the custom inspection system in an airport. As X-ray source, we have developed X-band Linac and achieved maximum X-ray energy 950 keV using the low power magnetron (250 kW) in 2 {mu}s pulse length. The whole size of the Linac system is 1x1x1 m{sup 3}. That is realized by introducing X-band system. In addition, we have designed two-fold scintillator detector in dual energy X-ray concept. Monte carlo N-particle transport (MCNP) code was used to make up sensor part of the design with two scintillators, CsI and CdWO4. The custom inspection system is composed of two equipments: 950 keV X-band Linac and two-fold scintillator and they are operated simulating real situation such as baggage check in an airport. We will show you the results of experiment which was performed with metal samples: iron and lead as targets in several conditions.

Lee, Kiwoo; Natsui, Takuya; Hirai, Shunsuke; Uesaka, Mitsuru [University of Tokyo, 2-22 Tokai-mura, Ibaraki-ken 319-1188 (Japan); Hashimoto, Eiko [Japan atomic energy agency (JAEA), 4-49 Muramatsu Tokai-mura, Ibaraki-ken (Japan)

2011-06-01

55

A two-fold interpenetrating 3D metal-organic framework material constructed from helical chains linked via 4,4'-H{sub 2}bpz fragments  

SciTech Connect

A 3-connected dia-f-type metal-organic framework compound {l_brace}[Ag(L){sub 3/2}H{sub 2}PO{sub 4}]{r_brace}{sub n} (1) has been synthesized by self-assembly of 4,4'-H{sub 2}bpz (L=4,4'-H{sub 2}bpz=3,3',5,5'-tetramethyl-4,4'-bipyrazole) and Ag{sub 4}P{sub 2}O{sub 7} under hydrothermal conditions. It crystallizes in the tetragonal space group I4{sub 1}/acd with a=21.406(4) A, b=21.406(4) A, c=36.298(8) A, Z=32. X-ray single-crystal diffraction reveals that 1 has a three-dimensional framework with an unprecedented alternate left- and right-handed helices structure, featuring a non-uniform two-fold interpenetrated (4.14{sup 2}) net. Photoluminescent investigation reveals that the title compound displays interesting emissions in a wide region, which shows that the title compound may be a good potential candidate as a photoelectric material. - Graphical abstract: A 3-connected dia-f-type metal-organic framework compound [Ag(4,4'-bpz){sub 3/2}H{sub 2}PO{sub 4}] shows unprecedented alternating left- and right-handed helices structure, featuring a non-uniform two-fold interpenetrated (4.14{sup 2}) net.

Xie Yiming [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 35002 (China); College of Materials Science and Engineering, Huaqiao University, the Key Laboratory for Functional Materials of Fujian Higher Education, Quanzhou, Fujian 362021 (China); Zhao Zhenguo; Wu Xiaoyuan; Zhang Qisheng; Chen Lijuan; Wang Fei; Chen Shanci [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 35002 (China); Lu Canzhong [State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 35002 (China)], E-mail: czlu@fjirsm.ac.cn

2008-12-15

56

Serials Management Transitions in Turbulent Times  

Microsoft Academic Search

This installment of “The Balance Point” presents descriptions of existing ideas and activities related to serials management during the current economic situation and with new digital priorities in medium to very large academic library systems. Contributors discuss current organization and activities related to traditional serials tasks, such as acquisitions, check-in, claiming and binding of print periodicals, and outline relationships to

Lisa Spagnolo; Buddy Pennington; Kathy Carter; Sharon Dyas-Correia

2010-01-01

57

Reidentifying hardware after loss of serial number  

NASA Technical Reports Server (NTRS)

System traces fabrication and inspection records of special hardware back to the raw material. Reidentification of hardware, after loss of serial numbers, is established by X raying all parts again and comparing the new film with the original, whose numbers were previously recorded on serialized documents.

Wells, R. J.

1969-01-01

58

Decision Making in the Recataloging of Serials  

Microsoft Academic Search

Catalogers make decisions constantly, especially when recataloging serials. This article explores the decisions that need to be made when recataloging serials, within the framework of a decision-making model used in business. For catalogers, this model consists of becoming aware that a recataloging problem exists, defining what the problem is, analyzing the alternatives for handling it, selecting the best solution based

Lori L. Osmus

1992-01-01

59

Kismet: parallel speedup estimates for serial programs  

Microsoft Academic Search

Software engineers now face the difficult task of refactoring serial programs for parallel execution on multicore processors. Currently, they are offered little guidance as to how much benefit may come from this task, or how close they are to the best possible parallelization. This paper presents Kismet, a tool that creates parallel speedup estimates for unparallelized serial programs. Kismet differs

Donghwan Jeon; Saturnino Garcia; Chris Louie; Michael Bedford Taylor

2011-01-01

60

Helium dilution refrigeration system  

DOEpatents

A helium dilution refrigeration system operable over a limited time period, and recyclable for a next period of operation. The refrigeration system is compact with a self-contained pumping system and heaters for operation of the system. A mixing chamber contains .sup.3 He and .sup.4 He liquids which are precooled by a coupled container containing .sup.3 He liquid, enabling the phase separation of a .sup.3 He rich liquid phase from a dilute .sup.3 He-.sup.4 He liquid phase which leads to the final stage of a dilution cooling process for obtaining low temperatures. The mixing chamber and a still are coupled by a fluid line and are maintained at substantially the same level with the still cross sectional area being smaller than that of the mixing chamber. This configuration provides maximum cooling power and efficiency by the cooling period ending when the .sup.3 He liquid is depleted from the mixing chamber with the mixing chamber nearly empty of liquid helium, thus avoiding unnecessary and inefficient cooling of a large amount of the dilute .sup.3 He-.sup.4 He liquid phase.

Roach, Patrick R. (Darien, IL); Gray, Kenneth E. (Naperville, IL)

1988-01-01

61

Design of Serially Concatenated Interleaved Codes  

NASA Technical Reports Server (NTRS)

A serially concatenated code with interleaver consists of the cascade of an outer encoder, an interleaver permuting the outer codeword bits, and an inner encoder whose input words are the permuted outer codewords.

Pollara, F.

1997-01-01

62

Design of Serially Concatenated Trellis Coded Modulation  

NASA Technical Reports Server (NTRS)

Serial concatenation of an outer binary convolutional code with an inner TCM code over a multidimensional Euclidean constellation through an interleaver, allows to extend the extremely good performance of turbo codes to the case of high spectral efficiency.

Benedetto, S.; Divsalar, D.; Garello, R.; Montorsi, G.; Pollara, F.

1998-01-01

63

Parallel Models of Serial Behaviour: Lashley Revisited  

Microsoft Academic Search

In 1951, Lashley highlighted the importance of serial order for the brain and behavioural sciences. He considered the response chaining account untenable and proposed an alternative employing parallel response activation and \\

George Houghton; Tom Hartley

64

Diluted magnetic semiconductors  

Microsoft Academic Search

Diluted magnetic semiconductors (DMSs), i.e. semiconducting crystals whose lattice is made up in part of substitutional magnetic ions (e.g. Cd1-xMnxTe, Hg1-xFex Se, Zn1-xCoxS), are reviewed. The focus is on materials of the type A1-xII MnxB VI, which are the most thoroughly understood. However, the similarities and differences between these materials and the A1-x IIFexBVI and A1-IICoxBVI systems are discussed wherever

Nitin Samarth; J. K. Furdyna

1990-01-01

65

Anomalies in vortex lattice dynamics driven by induced ac currents in superconducting films with magnetic arrays of two-fold symmetry  

NASA Astrophysics Data System (ADS)

We study the dynamics of the vortex lattice driven by ac induced currents in the critical state regime, for T > 0.70 TC. The samples are superconducting films grown on top of two-fold symmetry array of magnetic dots. In these heterostructures, the induced ac currents flow parallel to the short and to the long side of the pinning array in different areas of the samples simultaneously. This behavior produces remarkable effects in the vortex lattice dynamics. First of all, periodic features are observed in the ac susceptibility versus applied magnetic field measurements which are related to matching effects between the vortex lattices and the magnetic array. However, the vortex lattice reconfiguration observed in magnetotransport experiments is absent. Some of these features are revealed as maxima instead of being minima, indicating higher mobility at certain matching fields. Competing unstable vortex configurations could lead to increase vortex mobility precluding the reconfiguration transition. At high temperatures, where the matching effects show up, the magnetic permeability of the dots is the mechanism that governs the JC(T) behavior. Moreover, the temperature dependence of the pinning force FP(T) shows a temperature crossover related to an unexpected enhancement in vortex mobility. Vortex–vortex interaction and the interplay between trapped and interstitial vortices are a hint to explain these phenomena.

Moreno, A. J.; Chiliotte, C. E.; Pasquini, G.; Bekeris, V.; Gomez, A.; del Valle, J.; Gonzalez, E. M.; Prieto, J. L.; Vicent, J. L.

2015-01-01

66

Effect of serial extraction alone on crowding: Spontaneous changes in dentition after serial extraction  

Microsoft Academic Search

We examined changes in dentition after serial extraction in subjects who wore no appliances to determine the relationships between changes in dentition and improvement in dental crowding. Mandibular dental casts and lateral cephalograms from 31 subjects who had undergone serial extraction without orthodontic treatment were analyzed at 3 stages: before extraction of the deciduous canines (T1), after extraction of first

Toshihiro Yoshihara; Yuko Matsumoto; Junichi Suzuki; Naoshi Sato; Haruhisa Oguchi

2000-01-01

67

Functional integration of serial dilution and capillary electrophoresis on a PDMS microchip  

Microsoft Academic Search

For the quantitative analysis of an unknown sample a calibration curve should be obtained, as analytical instruments give\\u000a relative, rather than absolute measurements. Therefore, researchers should make standard samples with various known concentrations,\\u000a measure each standard and the unknown sample, and then determine the concentration of the unknown by comparing the measured\\u000a value to those of the standards. These procedures

Jun Keun Chang; Yun Seok Heo; Hyunwoo Bang; Keunchang Cho; Seok Chung; Chanil Chung; Dong Chul Han

2003-01-01

68

Dilution jet mixing program  

NASA Technical Reports Server (NTRS)

Parametric tests were conducted to quantify the mixing of opposed rows of jets (two-sided injection) in a confined cross flow. Results show that jet penetrations for two sided injections are less than that for single-sided injections, but the jet spreading rates are faster for a given momentum ratio and orifice plate. Flow area convergence generally enhances mixing. Mixing characteristics with asymmetric and symmetric convergence are similar. For constant momentum ratio, the optimum S/H(0) with in-line injections is one half the optimum value for single sided injections. For staggered injections, the optimum S/H(0) is twice the optimum value for single-sided injection. The correlations developed predicted the temperature distributions within first order accuracy and provide a useful tool for predicting jet trajectory and temperature profiles in the dilution zone with two-sided injections.

Srinivasan, R.; Coleman, E.; Johnson, K.

1984-01-01

69

Standard dilution analysis.  

PubMed

Standard dilution analysis (SDA) is a novel calibration method that may be applied to most instrumental techniques that will accept liquid samples and are capable of monitoring two wavelengths simultaneously. It combines the traditional methods of standard additions and internal standards. Therefore, it simultaneously corrects for matrix effects and for fluctuations due to changes in sample size, orientation, or instrumental parameters. SDA requires only 200 s per sample with inductively coupled plasma optical emission spectrometry (ICP OES). Neither the preparation of a series of standard solutions nor the construction of a universal calibration graph is required. The analysis is performed by combining two solutions in a single container: the first containing 50% sample and 50% standard mixture; the second containing 50% sample and 50% solvent. Data are collected in real time as the first solution is diluted by the second one. The results are used to prepare a plot of the analyte-to-internal standard signal ratio on the y-axis versus the inverse of the internal standard concentration on the x-axis. The analyte concentration in the sample is determined from the ratio of the slope and intercept of that plot. The method has been applied to the determination of FD&C dye Blue No. 1 in mouthwash by molecular absorption spectrometry and to the determination of eight metals in mouthwash, wine, cola, nitric acid, and water by ICP OES. Both the accuracy and precision for SDA are better than those observed for the external calibration, standard additions, and internal standard methods using ICP OES. PMID:25599250

Jones, Willis B; Donati, George L; Calloway, Clifton P; Jones, Bradley T

2015-02-17

70

Serial-parallel decompositions of Mueller matrices.  

PubMed

The algebraic methods for serial and parallel decompositions of Mueller matrices are combined in order to obtain a general framework for a suitable analysis of polarimetric measurements based on equivalent systems constituted by simple components. A general procedure for the parallel decomposition of a Mueller matrix into a convex sum of pure elements is presented and applied to the two canonical forms of depolarizing Mueller matrices [Ossikovski, J. Opt. Soc. Am. A 27, 123 (2010).], leading to the serial-parallel decomposition of any Mueller matrix. The resultant model is consistent with the mathematical structure and the reciprocity properties of Mueller matrices. PMID:23456000

Gil, José J; San José, Ignacio; Ossikovski, Razvigor

2013-01-01

71

Serial multiplier arrays for parallel computation  

NASA Technical Reports Server (NTRS)

Arrays of systolic serial-parallel multiplier elements are proposed as an alternative to conventional SIMD mesh serial adder arrays for applications that are multiplication intensive and require few stored operands. The design and operation of a number of multiplier and array configurations featuring locality of connection, modularity, and regularity of structure are discussed. A design methodology combining top-down and bottom-up techniques is described to facilitate development of custom high-performance CMOS multiplier element arrays as well as rapid synthesis of simulation models and semicustom prototype CMOS components. Finally, a differential version of NORA dynamic circuits requiring a single-phase uncomplemented clock signal introduced for this application.

Winters, Kel

1990-01-01

72

Dose reduction in CT with correlated-polarity noise reduction: context-dependent spatial resolution and noise properties demonstrating two-fold dose reduction with minimal artifacts  

NASA Astrophysics Data System (ADS)

Correlated-polarity noise reduction (CPNR) is a novel noise reduction technique that uses a statistical approach to reducing noise while maintaining excellent spatial resolution and a traditional noise appearance. It was demonstrated in application to CT imaging for the first time at SPIE 2013 and showed qualitatively excellent image quality at half of normal CT dose. In this current work, we measure quantitatively the spatial resolution and noise properties of CPNR in CT imaging. To measure the spatial resolution, we developed a metrology approach that is suitable for nonlinear algorithms such as CPNR. We introduce the formalism of Signal Modification Factor, SMF(u,v), which is the ratio in frequency space of the CPNR-processed image divided by the noise-free image, averaged over an ensemble of ROIs in a given anatomical context. SMF is a nonlinear analog to the MTF. We used XCAT computer-generated anthropomorphic phantom images followed by projection space processing with CPNR. The SMF revealed virtually no effect from CPNR on spatial resolution of the images (<7% degradation at all frequencies). Corresponding contextdependent NPS measurements generated with CPNR at half-dose were about equal to the NPS of full-dose images without CPNR. This result demonstrates for the first time the quantitative determination of a two-fold reduction in dose with CPNR with less than 7% reduction in spatial resolution. We conclude that CPNR shows strong promise as a method for reduction of noise (and hence, dose) in CT. CPNR may also be used in combination with iterative reconstruction techniques for yet further dose reduction, pending further investigation.

Dobbins, James T.; Wells, Jered R.; Segars, W. Paul

2014-03-01

73

A Serials Holdings List Using UNIX Refer.  

ERIC Educational Resources Information Center

Describes the production of an automated union list of serials holdings at minimal cost by a small consortium of state government libraries in Louisiana. Use of the UNIX Refer system without any modifications for data entry and production is described. (EM)

Boyce, Judith I.; Boyce, Bert R.

1987-01-01

74

Serial Position Curves in Free Recall  

ERIC Educational Resources Information Center

The scenario for free recall set out in Laming (2009) is developed to provide models for the serial position curves from 5 selected sets of data, for final free recall, and for multitrial free recall. The 5 sets of data reflect the effects of rate of presentation, length of list, delay of recall, and suppression of rehearsal. Each model…

Laming, Donald

2010-01-01

75

Notes for Serials Cataloging. Second Edition.  

ERIC Educational Resources Information Center

Notes are indispensable to serials cataloging. Researchers, reference librarians, and catalogers regularly use notes on catalog records and, as the audience for these notes has expanded from the local library community to the global Internet community, the need for notes to be cogent, clear, and useful is greater than ever. This book is a…

Geer, Beverley, Ed.; Caraway, Beatrice L., Ed.

76

Digital Fundamentals Presentation: Serial Digital Interface  

NSDL National Science Digital Library

Basic electronics systems operations all contain the generation, transfer, and reception of electronic data. One of the most common but not usually covered interfaces is Serial Input and Output (I/O). This presentation covers the standard ways of getting data in and out of digital circuits, equipment, and computer systems. Users must create a free account to download this resource.

2014-07-18

77

Stress in dilute suspensions  

NASA Technical Reports Server (NTRS)

Generally, two types of theory are used to describe the field equations for suspensions. The so-called postulated equations are based on the kinetic theory of mixtures, which logically should give reasonable equations for solutions. The basis for the use of such theory for suspensions is tenuous, though it at least gives a logical path for mathematical arguments. It has the disadvantage that it leads to a system of equations which is underdetermined, in a sense that can be made precise. On the other hand, the so-called averaging theory starts with a determined system, but the very process of averaging renders the resulting system underdetermined. A third type of theory is proposed in which the kinetic theory of gases is used to motivate continuum equations for the suspended particles. This entails an interpretation of the stress in the particles that is different from the usual one. Classical theory is used to describe the motion of the suspending medium. The result is a determined system for a dilute suspension. Extension of the theory to more concentrated systems is discussed.

Passman, Stephen L.

1989-01-01

78

/ http://www.sciencemag.org/content/early/recent / 11 September 2014 / Page 1 / 10.1126/science.1256729 The hallmark of meiosis is a two-fold reduction in ploidy, which occurs  

E-print Network

.1126/science.1256729 The hallmark of meiosis is a two-fold reduction in ploidy, which occurs because one round of DNA replication is followed by two rounds of chromosome segregation. During meiosis I, sister chromatids uniquely co-migrate, thereby enabling segregation of homologous chromosomes. During meiosis II

Asbury, Chip

79

40 CFR 1065.240 - Dilution air and diluted exhaust flow meters.  

Code of Federal Regulations, 2014 CFR

... 2014-07-01 false Dilution air and diluted exhaust flow meters...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS ENGINE-TESTING PROCEDURES...Measurements § 1065.240 Dilution air and diluted exhaust flow...

2014-07-01

80

Dynamic Control of Serial-batch Processing Systems  

E-print Network

This research explores how near-future information can be used to strategically control a batch processor in a serial-batch processor system setting. Specifically, improved control is attempted by using the upstream serial processor to provide near...

Cerekci, Abdullah

2010-01-14

81

Serial Position Markers in Space: Visuospatial Priming of Serial Order Working Memory Retrieval  

PubMed Central

Most general theories on serial order working memory (WM) assume the existence of position markers that are bound to the to-be-remembered items to keep track of the serial order. So far, the exact cognitive/neural characteristics of these markers have remained largely underspecified, while direct empirical evidence for their existence is mostly lacking. In the current study we demonstrate that retrieval from verbal serial order WM can be facilitated or hindered by spatial cuing: begin elements of a verbal WM sequence are retrieved faster after cuing the left side of space, while end elements are retrieved faster after cuing the right side of space. In direct complement to our previous work—where we showed the reversed impact of WM retrieval on spatial processing—we argue that the current findings provide us with a crucial piece of evidence suggesting a direct and functional involvement of space in verbal serial order WM. We outline the idea that serial order in verbal WM is coded within a spatial coordinate system with spatial attention being involved when searching through WM, and we discuss how this account can explain several hallmark observations related to serial order WM. PMID:25611595

De Belder, Maya; Abrahamse, Elger; Kerckhof, Emma; Fias, Wim; van Dijck, Jean-Philippe

2015-01-01

82

Magnetic Particle Recovery of Serial Numbers  

SciTech Connect

One method used by crime labs to recover obliterated serial numbers in steel firearms (ferrous samples) is the magnetic particle technique. The use of this method is predicated on the detection of metal deformation present under stamped serial numbers after the visible stamp has been removed. Equipment specialized for this detection is not used in these attempts; a portable magnetic yoke used typically for flaw detection on large weldments or structures, along with dry visible magnetic powders, have been the tools of criminologists working in this area. Crime labs have reported low success rates using these tools [1, 2]. This is not surprising when one considers that little formal development has apparently evolved for use in such investigations since the publication of seminal work in this area some time ago [3]. The aim of this project is to investigate specific aspects of magnetic particle inspection for serial number recovery. This includes attempts to understand the magnetic characteristics of different steels that affect their performance in the test, such as varying results for carbon steels and alloy steels after different thermal and forming treatments. Also investigated are the effects of the nature of the sample magnetization (AC, rectified DC, and true DC) and the use of various detection media, such as visible powders and fluorescent sprays, on test outcome. Additionally, some aspects of surface preparation of firearm samples prior to number recovery were included in this work. The scope of this report includes a brief overview of the magnetic particle inspection method in general and its applications to forensic serial number recovery. This is followed by a description of how such investigations were simulated on lab samples, including a look at how the microstructure of a given steel will affect its performance in the test. Investigations into the serial number recovery in a series of ferromagnetic firearms (both steel and certain stainless steels) will then be presented. Recommendations for modifications to current approaches used in crime labs for serial number recovery, as well as suggestions for future work, conclude this document.

D. Utrata; M.J. Johnson

2003-10-01

83

Serial Publications Section. Collections and Services Division. Papers.  

ERIC Educational Resources Information Center

Papers on the acquisition and cataloging of serials presented at the 1982 International Federation of Library Associations (IFLA) conference include: (1) "CONSER (CONversion of SERials): What It Is and How It Works," a description by Barrie A. F. Burns (Canada) of a North American cooperative serials cataloging project and its origins, management,…

International Federation of Library Associations, The Hague (Netherlands).

84

Tracking Serial Criminals with a Road Metric Control #7273  

E-print Network

Tracking Serial Criminals with a Road Metric Control #7273 February 22, 2010 Abstract In this paper for a serial criminal based on the loca- tions and times of a sequence of past crimes. We first create a "road to predict the residences of serial criminals, we use a refinement of a model developed by Rossmo, again

Morrow, James A.

85

Concurrent Cognitive Processes in Rat Serial Pattern Learning: Item Memory, Serial Position, and Pattern Structure.  

PubMed

Three experiments examined the processes mediating rat serial pattern learning for rule-consistent versus rule-violating pattern elements ("violation elements"). In all three experiments, rats were trained to press retractable levers in a circular array in a specific sequence for brain stimulation reward (BSR). Experiment 1 examined the role of lever location (L) and element serial position (SP) cues in rats' ability to learn to anticipate a violation element positioned at the end of a 24-element serial pattern. Rats with L cues either alone or in combination with SP cues learned to anticipate the violation element, whereas those with SP cues alone did not. Rats in groups L and L+SP underwent a series of transfers designed to remove various cues that might have controlled their performance on the violation element. Results indicated that intra-chamber lever location cues mediated performance on the violation element whereas performance on rule-consistent elements within pattern chunks was mediated by an internal mnemonic representation that was insensitive to changes in lever location cues. Experiment 2 examined whether rats could learn to use SP cues alone to anticipate a violation element if it was positioned earlier in a serial pattern. Rats learned to anticipate the violation element based on SP cues alone when it was located in SP6 in a 24-element pattern, but not when it was in SP12. Experiment 3 examined whether or not rats spontaneously encode information about chunk length and the serial position of phrasing cues in serial patterns. Rats were trained to a high criterion on the serial pattern used in Experiment 1, then were challenged with three probe patterns that manipulated both chunk length and overall pattern length. Results indicated that rats spontaneously encoded information regarding the serial position of phrasing cues in relation to chunk length. Thus, rats appear to use at least three cognitive processes concurrently in serial pattern learning tasks, namely, item memory involving external discriminative cues, counting- or timing-like processes for encoding serial position, and rule abstraction for encoding an internal representation of pattern structure. PMID:22969166

Muller, Melissa D; Fountain, Stephen B

2010-11-01

86

Sea Urchin Embryology: Sperm Dilution  

NSDL National Science Digital Library

Lab directions for up to two 50 min periods and the last of the dilution labs. Includes set up information, materials, procedure, experimental design, things to observe, math possibilities, thought-provoking questions and an assessment.

PhD David Epel (Stanford U. Hopkins Marine Station)

2007-04-20

87

Sea Urchin Embryology: Simple Dilutions  

NSDL National Science Digital Library

Starting from a known concentration students learn to use dilutions to determine the concentration of an unknown. The following skills are used in this lesson: 1. making dilutions 2. reading the meter on a simple homemade spectrophotometer 3. keeping careful laboratory records 4. graphing on linear graph paper 5. determining an unknown concentration from known 6. using a colored filter to enhance contrast and sensitivity

PhD David Epel (Stanford U. Hopkins Marine Station)

2006-12-20

88

Stochastic modeling of a serial killer  

E-print Network

We analyze the time pattern of the activity of a serial killer, who during twelve years had murdered 53 people. The plot of the cumulative number of murders as a function of time is of "Devil's staircase" type. The distribution of the intervals between murders (step length) follows a power law with the exponent of 1.4. We propose a model according to which the serial killer commits murders when neuronal excitation in his brain exceeds certain threshold. We model this neural activity as a branching process, which in turn is approximated by a random walk. As the distribution of the random walk return times is a power law with the exponent 1.5, the distribution of the inter-murder intervals is thus explained. We confirm analytical results by numerical simulation.

Simkin, M V

2012-01-01

89

A Spatial Modality Effect in Serial Memory  

Microsoft Academic Search

In 2 experiments, the authors tested whether the classical modality effect—that is, the stronger recency effect for auditory items relative to visual items—can be extended to the spatial domain. An order reconstruction task was undertaken with four types of material: visual–spatial, auditory–spatial, visual–verbal, and auditory–verbal. Similar serial position curves were obtained regardless of the nature of the to-be-remembered sequences, with

Sébastien Tremblay; Fabrice B. R. Parmentier; Katherine Guérard; Alastair P. Nicholls; Dylan M. Jones

2006-01-01

90

Droplet streams for serial crystallography of proteins  

Microsoft Academic Search

Serial diffraction of proteins requires an injection method to deliver analyte molecules—preferably uncharged, fully hydrated,\\u000a spatially oriented, and with high flux—into a focused probe beam of electrons or X-rays that is only a few tens of microns\\u000a in diameter. This work examines conventional Rayleigh sources and electrospray-assisted Rayleigh sources as to their suitability\\u000a for this task. A comparison is made

U. Weierstall; R. B. Doak; J. C. H. Spence; D. Starodub; D. Shapiro; P. Kennedy; J. Warner; G. G. Hembree; P. Fromme; H. N. Chapman

2008-01-01

91

Serial wireless IP networks for DOT applications  

Microsoft Academic Search

This work presents the use of commercial off-the-shelf (COTS) wireless Internet technology to meet needs of departments of transportation (DOTs). COTS wireless is an economical, scalable alternative to traditional fiber optics and telephony communications solutions. A virtual Ethernet network is created along a highway right-of-way (ROW) by installing wireless point-to-point links in a serial fashion that can extend upwards of

A. Amanna; A. Schroeder

2004-01-01

92

Lipidic phase membrane protein serial femtosecond crystallography  

PubMed Central

X-ray free electron laser (X-feL)-based serial femtosecond crystallography is an emerging method with potential to rapidly advance the challenging field of membrane protein structural biology. here we recorded interpretable diffraction data from micrometer-sized lipidic sponge phase crystals of the Blastochloris viridis photosynthetic reaction center delivered into an X-feL beam using a sponge phase micro-jet. PMID:22286383

Johansson, Linda C; Arnlund, David; White, Thomas A; Katona, Gergely; DePonte, Daniel P; Weierstall, Uwe; Doak, R Bruce; Shoeman, Robert L; Lomb, Lukas; Malmerberg, Erik; Davidsson, Jan; Nass, Karol; Liang, Mengning; Andreasson, Jakob; Aquila, Andrew; Bajt, Sasa; Barthelmess, Miriam; Barty, Anton; Bogan, Michael J; Bostedt, Christoph; Bozek, John D; Caleman, Carl; Coffee, Ryan; Coppola, Nicola; Ekeberg, Tomas; Epp, Sascha W; Erk, Benjamin; Fleckenstein, Holger; Foucar, Lutz; Graafsma, Heinz; Gumprecht, Lars; Hajdu, Janos; Hampton, Christina Y; Hartmann, Robert; Hartmann, Andreas; Hauser, Günter; Hirsemann, Helmut; Holl, Peter; Hunter, Mark S; Kassemeyer, Stephan; Kimmel, Nils; Kirian, Richard A; Maia, Filipe R N C; Marchesini, Stefano; Martin, Andrew V; Reich, Christian; Rolles, Daniel; Rudek, Benedikt; Rudenko, Artem; Schlichting, Ilme; Schulz, Joachim; Seibert, M Marvin; Sierra, Raymond G; Soltau, Heike; Starodub, Dmitri; Stellato, Francesco; Stern, Stephan; Strüder, Lothar; Timneanu, Nicusor; Ullrich, Joachim; Wahlgren, Weixiao Y; Wang, Xiaoyu; Weidenspointner, Georg; Wunderer, Cornelia; Fromme, Petra; Chapman, Henry N; Spence, John C H; Neutze, Richard

2012-01-01

93

Serial reversal learning in bumblebees (Bombus impatiens).  

PubMed

Bumblebees are capable of rapidly learning discriminations, but flexibility in bumblebee learning is less well understood. We tested bumblebees (Bombus impatiens) on a serial reversal learning task. A serial reversal task requires learning of an initial discrimination between two differentially rewarded stimuli, followed by multiple reversals of the reward contingency between stimuli. A reduction in errors with repeated reversals in a serial reversal task is an indicator of behavioural flexibility. Bees were housed in a large indoor environment and tested during foraging flights. Testing free-flying bees allowed for large numbers of trials and reversals. All bees were trained to perform a simultaneous discrimination between two colours for a nectar reward, followed by nine reversals of this discrimination. Results showed that bumblebees reduced errors and improved their performance across successive reversals. A reduction in perseverative errors was the major cause of the improvement in performance. Bees showed a slight increase in error rate in their final trials, perhaps as a consequence of increasing proactive interference, but proactive interference may also have contributed to the overall improvement in performance across reversals. Bumblebees are thus capable of behavioural flexibility comparable to that of other animals and may use proactive interference as a mechanism of behavioural flexibility in varying environments. PMID:24218120

Strang, Caroline G; Sherry, David F

2014-05-01

94

Novel synthesis of 5-methyl-5,10-dihydroindolo[3,2-b]indoles by Pd-catalyzed C-C and two-fold C-N coupling reactions.  

PubMed

A series of 5,10-dihydroindolo[3,2-b]indoles was successfully prepared by an efficient two-step strategy based on site-selective Pd-catalyzed cross-coupling reaction with N-methyl-2,3-dibromoindole and subsequent cyclization by two-fold Pd-catalyzed C-N coupling with amines. The products show a strong fluorescence. PMID:25381935

Hung, Tran Quang; Hancker, Sören; Villinger, Alexander; Lochbrunner, Stefan; Dang, Tuan Thanh; Friedrich, Aleksej; Breitsprecher, Wolfgang; Langer, Peter

2015-01-14

95

Concurrent Cognitive Processes in Rat Serial Pattern Learning: Item Memory, Serial Position, and Pattern Structure  

ERIC Educational Resources Information Center

Three experiments examined the processes mediating rat serial pattern learning for rule-consistent versus rule-violating pattern elements ("violation elements"). In all three experiments, rats were trained to press retractable levers in a circular array in a specific sequence for brain-stimulation reward (BSR). Experiment 1 examined the role of…

Muller, Melissa D.; Fountain, Stephen B.

2010-01-01

96

Resource Dilution or Resource Augmentation?  

E-print Network

Resource Dilution or Resource Augmentation? Number of Siblings, Birth Order, Sex of the Child Augmentation? Number of Siblings, Birth Order, Sex of the Child and Frequency of Mother's Activities, the labor market, equality, migration, health, or gender. One goal of the SFB is to integrate these fields

Moeller, Ralf

97

Single-chip computer and serial communication of GPRS modem  

NASA Astrophysics Data System (ADS)

Communication between PC and Modem is common, while communication between single-chip computer and Modem is rare. This article will elaborate serial communication between single-chip computer and GPRS modem. The wide use of serial communication will enable various transmission units to connect as one organically and exchange data and information in safe and reliable manner. However, since signal of each transmission channel is different, the serial port in use should be various. Therefore, in order to realize communication among units, it is necessary to involve serial port conversion among each unit.

Li, Baohong

2013-03-01

98

Serial transcranial Doppler study in meningitis.  

PubMed

Serial transcranial doppler studies were carried out in 12 patients, who developed meningitis during their hospital stay. Blood flow velocities in large basal vessels of the anterior circle of Willis were correlated with CSF pleocytosis and CSF sugar values. Mean blood flow velocities were found to be directly proportional to the CSF white blood cell (WBC) count and were inversely proportional to the CSF sugar values. Blood flow velocities were higher when CSF WBC count was raised. With only one exception these velocities decreased progressively with a fall in the CSF WBC count. At the time of meningitis there occurred a reduction in CSF sugar values and the blood flow velocities were significantly higher. With increase in CSF sugar values there occurred a gradual fall in the blood flow velocities. PMID:8748873

Gupta, R; Mahapatra, A K; Bhatia, R

1995-01-01

99

Performance evaluation of object serialization libraries in XML, JSON and binary formats  

Microsoft Academic Search

This paper compares twelve libraries of object serialization from qualitative and quantitative aspects. Those are object serialization in XML, JSON and binary formats. Using each library, a common example is serialized to a file. The size of the serialized file and the processing time are measured during the execution to compare all object serialization libraries. Some libraries show the performance

Kazuaki Maeda

2012-01-01

100

The Application of Control Technology Based on Serial Port Communication  

Microsoft Academic Search

In this article data glove and mechanical arm are connected by RS-232 serial port line, so mechanical arm and data glove are very critical in the data transmission among computers. Under windows serial port communication can be realized in the two methods below: making use of ActiveX control and API communication function. In this passage the advantages and shortcomings of

Junjie Zhang; Wei Wei

2009-01-01

101

Impact of police cultural knowledge on violent serial crime investigation  

Microsoft Academic Search

Purpose – This paper aims to examine the influence of police cultural knowledge on the investigation of violent serial crimes. Specifically, it aims to identify whether such knowledge impacts the way in which investigative techniques are implemented. Of particular interest is the police knowledge specific to victims of violent serial crimes. Design\\/methodology\\/approach – A case study analysis of five incidents

Natalie Scerra

2011-01-01

102

From Serial Loops to Parallel Execution on Distributed Systems  

E-print Network

code instead of making progress in her field of science. A better solution would be to rely on a runFrom Serial Loops to Parallel Execution on Distributed Systems George Bosilca1 , Aurelien presented in this paper can analyze the data flow of serial codes with imperfectly nested, affine loop

Dongarra, Jack

103

A Management Information System for Serials and Continuations.  

ERIC Educational Resources Information Center

Cutbacks in funding and personnel required the Mankato State College Library to gain more effective control over its serials collection. The task was to integrate the various data, some unrecorded, on standing orders and serials holdings and to produce for the library directors specialized lists of many types: all titles ordered from a specific…

Olson, Nancy B.; Lester, Daniel W.

104

EXPLOITING IMMUNOLOGICAL METAPHORS IN THE DEVELOPMENT OF SERIAL, PARALLEL, AND  

E-print Network

EXPLOITING IMMUNOLOGICAL METAPHORS IN THE DEVELOPMENT OF SERIAL, PARALLEL, AND DISTRIBUTED LEARNING;Abstract This thesis examines the use of immunological metaphors in building serial, parallel are placed in the context of this framework. An investigation into the use of immunological components

Kent, University of

105

High efficiency battery management system for serially connected battery string  

Microsoft Academic Search

This article presents an approach for balancing serially connected battery strings with high efficiency energy transferred. The efficiency of this balancing process is accomplished by channeling an excess energy through a DC Link Bus rather than done serially. Using this proposed technique with converter which was 80 percent efficiency, the equalized efficiency of balancing process is increased more than the

C. Karnjanapiboon; Kamon Jirasereeamornkul; Veerapol Monyakul

2009-01-01

106

Indexing Serialized Fiction: May the Force Be with You.  

ERIC Educational Resources Information Center

The adult novel offers indexers an unusual opportunity to create a serialized fiction index. This research paper involved designing and creating a Character Index, Thesaurus, Glossary, and Abstract (with descriptors) for 21 novels based on the "Star Wars" movies. The novels are an unusual example of serialized fiction featuring main characters,…

Barr, Melissa M.

107

FLEXIBLE ESTIMATION OF SERIAL CORRELATION IN LINEAR MIXED MODELS  

Microsoft Academic Search

Abstract The linear mixed eects model has, arguably, become the most commonly used tool for analyzing continuous, normally distributed longitudinal data. In its general model formulation four structures can be distinguished: fixed eects, random eects, measurement error and serial correlation. Broadly speaking, serial correlation captures the phenomenon,that the correlation structure within a subject depends on the time lag between two

J. SERROYEN; E. VLOEBERGHS; G. VERBEKE

108

Postretention mandibular incisor stability after premolar serial extractions  

Microsoft Academic Search

The purpose of this study was to evaluate the mandibular incisor alignmentin serial extraction cases, using the longitudinal dental cast records of the Burlington Growth Center as a control sample. Various parameters were investigated and the statistical differences determined between the treated and untreated groups. The results were also compared with data from serial extraction groups that subsequently had orthodontic

Donald G. Woodside; P. Emile Rossouw; David Shearer

1999-01-01

109

Using a Text-Processing Language for Serial Record Conversion.  

ERIC Educational Resources Information Center

Describes the automation of the machine-readable library serials file at Golda Meir Library, University of Wisconsin-Milwaukee. Highlights include purchase of the PERLINE/BOOKLINE system including a MARC interface module called MICA, five main aspects of the problem posed by the library serials conversion project, and use of the text-processing…

Lowrey, James R.; Hardiman, Paul V.

1985-01-01

110

Retrospective Revaluation Effects Following Serial Compound Training and Target Extinction  

ERIC Educational Resources Information Center

Using a conditioned suppression task, two experiments examined retrospective revaluation effects after serial compound training in a release from overshadowing design. In Experiment 1, serial X [right arrow] A+ training produced suppression to target A, which was enhanced when preceded by feature X, whereas X by itself elicited no suppression.…

Effting, Marieke; Vervliet, Bram; Kindt, Merel

2010-01-01

111

Science Notes: Dilution of a Weak Acid  

ERIC Educational Resources Information Center

This "Science note" arose out of practical work involving the dilution of ethanoic acid, the measurement of the pH of the diluted solutions and calculation of the acid dissociation constant, K[subscript a], for each diluted solution. The students expected the calculated values of K[subscript a] to be constant but they found that the…

Talbot, Christopher; Wai, Chooi Khee

2014-01-01

112

An optically clocked transistor array for dual serial-to- parallel and parallel-to-serial conversion of optical packets  

Microsoft Academic Search

We propose an optically clocked transistor array which performs both serial-to-parallel and parallel-to-serial conversion (time demux\\/mux) of incoming\\/outgoing packets, enabling a low cost, low power, compact optical label processor for asynchronous burst optical packets.

Ryohei Urata; R. Takahashi; T. Nakahara; K. Takahata; H. Suzuki

2005-01-01

113

75 FR 59102 - Defense Federal Acquisition Regulation Supplement; Government-Assigned Serial Number Marking...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Acquisition Regulation Supplement; Government- Assigned Serial Number Marking (DFARS...DFARS) to require contractors to apply Government-assigned serial numbers in human-readable...Background Contractors are required to apply Government-assigned serial numbers, such...

2010-09-27

114

75 FR 22727 - Defense Federal Acquisition Regulation Supplement; Government-Assigned Serial Number Marking...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Acquisition Regulation Supplement; Government- Assigned Serial Number Marking (DFARS...DFARS) to require contractors to apply Government-assigned serial numbers in human-readable...274 to require contractors to apply Government-assigned serial numbers, such...

2010-04-30

115

Switch for serial or parallel communication networks  

DOEpatents

A communication switch apparatus and a method for use in a geographically extensive serial, parallel or hybrid communication network linking a multi-processor or parallel processing system has a very low software processing overhead in order to accommodate random burst of high density data. Associated with each processor is a communication switch. A data source and a data destination, a sensor suite or robot for example, may also be associated with a switch. The configuration of the switches in the network are coordinated through a master processor node and depends on the operational phase of the multi-processor network: data acquisition, data processing, and data exchange. The master processor node passes information on the state to be assumed by each switch to the processor node associated with the switch. The processor node then operates a series of multi-state switches internal to each communication switch. The communication switch does not parse and interpret communication protocol and message routing information. During a data acquisition phase, the communication switch couples sensors producing data to the processor node associated with the switch, to a downlink destination on the communications network, or to both. It also may couple an uplink data source to its processor node. During the data exchange phase, the switch couples its processor node or an uplink data source to a downlink destination (which may include a processor node or a robot), or couples an uplink source to its processor node and its processor node to a downlink destination.

Crosette, Dario B. (DeSoto, TX)

1994-01-01

116

Switch for serial or parallel communication networks  

DOEpatents

A communication switch apparatus and a method for use in a geographically extensive serial, parallel or hybrid communication network linking a multi-processor or parallel processing system has a very low software processing overhead in order to accommodate random burst of high density data. Associated with each processor is a communication switch. A data source and a data destination, a sensor suite or robot for example, may also be associated with a switch. The configuration of the switches in the network are coordinated through a master processor node and depends on the operational phase of the multi-processor network: data acquisition, data processing, and data exchange. The master processor node passes information on the state to be assumed by each switch to the processor node associated with the switch. The processor node then operates a series of multi-state switches internal to each communication switch. The communication switch does not parse and interpret communication protocol and message routing information. During a data acquisition phase, the communication switch couples sensors producing data to the processor node associated with the switch, to a downlink destination on the communications network, or to both. It also may couple an uplink data source to its processor node. During the data exchange phase, the switch couples its processor node or an uplink data source to a downlink destination (which may include a processor node or a robot), or couples an uplink source to its processor node and its processor node to a downlink destination. 9 figs.

Crosette, D.B.

1994-07-19

117

A Microgravity Helium Dilution Cooler  

NASA Technical Reports Server (NTRS)

We are developing a He-3-He-4 dilution cooler to operate in microgravity. It uses charcoal adsorption pumps and heaters for its operation; it has no moving parts. It currently operates cyclically to well below 0.1 K and we have designed a version to operate continuously. We expect that the continuous version will be able to provide the long-duration cooling that many experiments need at temperatures down to 0.040 K. More importantly, such a dilution cooler could provide the precooling that enables the use of adiabatic demagnetization techniques that can reach temperatures below 0.001 K. At temperatures below 0.002 K many fascinating microgravity experiments on superfluid He-3 become possible. Among the possibilities are: research into a superfluid He-3 gyroscope, study of the nucleation of the B-phase of superfluid He-3 when the sample is floating out of contact with walls, study of the anisotropy of the surface tension of the B-phase, and NMR experiments on tiny free-floating clusters of superfluid He-3 atoms that should model the shell structure of nuclei.

Roach, Pat R.; Sperans, Joel (Technical Monitor)

1994-01-01

118

Dilute Acid and Autohydrolysis Pretreatment  

NASA Astrophysics Data System (ADS)

Exposure of cellulosic biomass to temperatures of about 120-210°C can remove most of the hemicellulose and produce cellulose-rich solids from which high glucose yields are possible with cellulase enzymes. Furthermore, the use of dilute sulfuric acid in this pretreatment operation can increase recovery of hemicellulose sugars substantially to about 85-95% of the maximum possible versus only about 65% if no acid is employed. The use of small-diameter tubes makes it possible to employ high solids concentrations similar to those preferred for commercial operations, with rapid heat-up, good temperature control, and accurate closure of material balances. Mixed reactors can be employed to pretreat larger amounts of biomass than possible in such small-diameter tubes, but solids concentrations are limited to about 15% or less to provide uniform temperatures. Pretreatment of large amounts of biomass at high solids concentrations is best carried out using direct steam injection and rapid pressure release, but closure of material balances in such “steam gun” devices is more difficult. Although flow of water alone or containing dilute acid is not practical commercially, such flow-through configurations provide valuable insight into biomass deconstruction kinetics not possible in the batch tubes, mixed reactors, or steam gun systems.

Yang, Bin; Wyman, Charles E.

119

Automatic registration of serial mammary gland sections  

SciTech Connect

We present two new methods for automatic registration of microscope images of consecutive tissue sections. They represent two possibilities for the first step in the 3-D reconstruction of histological structures from serially sectioned tissue blocks. The goal is to accurately align the sections in order to place every relevant shape contained in each image in front of its corresponding shape in the following section before detecting the structures of interest and rendering them in 3D. This is accomplished by finding the best rigid body transformation (translation and rotation) of the image being registered by maximizing a matching function based on the image content correlation. The first method makes use of the entire image information, whereas the second one uses only the information located at specific sites, as determined by the segmentation of the most relevant tissue structures. To reduce computing time, we use a multiresolution pyramidal approach that reaches the best registration transformation in increasing resolution steps. In each step, a subsampled version of the images is used. Both methods rely on a binary image which is a thresholded version of the Sobel gradients of the image (first method) or a set of boundaries manually or automatically obtained that define important histological structures of the sections. Then distance-transform of the binary image is computed. A proximity function is then calculated between the distance image of the image being registered and that of the reference image. The transformation providing a maximum of the proximity function is then used as the starting point of the following step. This is iterated until the registration error lies below a minimum value.

Arganda-Carreras, Ignacio; Fernandez-Gonzalez, Rodrigo; Ortiz-de-Solorzano, Carlos

2004-04-13

120

Dilution in single pass arc welds  

SciTech Connect

A study was conducted on dilution of single pass arc welds of type 308 stainless steel filler metal deposited onto A36 carbon steel by the plasma arc welding (PAW), gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), and submerged arc welding (SAW) processes. Knowledge of the arc and melting efficiency was used in a simple energy balance to develop an expression for dilution as a function of welding variables and thermophysical properties of the filler metal and substrate. Comparison of calculated and experimentally determined dilution values shows the approach provides reasonable predictions of dilution when the melting efficiency can be accurately predicted. The conditions under which such accuracy is obtained are discussed. A diagram is developed from the dilution equation which readily reveals the effect of processing parameters on dilution to aid in parameter optimization.

DuPont, J.N.; Marder, A.R. [Lehigh Univ., Bethlehem, PA (United States). Dept. of Materials Science and Engineering

1996-06-01

121

Stiffness mapping of compliant parallel mechanisms in a serial arrangement  

E-print Network

Stiffness mapping of compliant parallel mechanisms in a serial arrangement Hyun K. Jung a , Carl D.: +1 352 392 9461; fax: +1 352 392 1071. E-mail addresses: hyunkwon.jung@gmail.com (H.K. Jung), ccrane

Florida, University of

122

Seriality in Contemporary American Memoir: 1957-2007  

E-print Network

, and in tandem with the rapid technological advancements of postmodern and postindustrial culture, I look at the serial authorship and publication of multiple self-reflexive texts and propose that serial memoir presents a challenge to the historically... privileged techniques of linear storytelling, narrative closure, and the possibility for autonomous subjectivity in American life writing. As generic boundaries become increasingly fluid, postmodern memoirists are able to be both more innovative and overt...

McDaniel-Carder, Nicole Eve

2010-10-12

123

Normalcy in Behavioral Characteristics of the Sadistic Serial Killer  

Microsoft Academic Search

Sadistic serial killers have been widely diagnosed as sociopaths who are lacking in empathy and inordinately concerned with\\u000a impression management. We propose instead that many of the behavioral characteristics thought to be distinctive of these serial\\u000a murderers are actually shared widely with millions of people who never kill anyone. By focusing so much on sociopathic characteristics,\\u000a researchers may have downplayed

Jack Levin; James Alan Fox

124

Three more semantic serial position functions and a SIMPLE explanation.  

PubMed

There are innumerable demonstrations of serial position functions-with characteristic primacy and recency effects-in episodic tasks, but there are only a handful of such demonstrations in semantic memory tasks, and those demonstrations have used only two types of stimuli. Here, we provide three more examples of serial position functions when recalling from semantic memory. Participants were asked to reconstruct the order of (1) two cartoon theme song lyrics, (2) the seven Harry Potter books, and (3) two sets of movies, and all three demonstrations yielded conventional-looking serial position functions with primacy and recency effects. The data were well-fit by SIMPLE, a local distinctiveness model of memory that was originally designed to account for serial position effects in short- and long-term episodic memory. According to SIMPLE, serial position functions in both episodic and semantic memory tasks arise from the same type of processing: Items that are more separated from their close neighbors in psychological space at the time of recall will be better remembered. We argue that currently available evidence suggests that serial position functions observed when recalling items that are presumably in semantic memory arise because of the same processes as those observed when recalling items that are presumably in episodic memory. PMID:23263860

Kelley, Matthew R; Neath, Ian; Surprenant, Aimée M

2013-05-01

125

Turbulence in Dilute Polymer Solutions  

NASA Astrophysics Data System (ADS)

We report measurements of particle trajectories in bulk turbulence of Re < 3200 for a dilute polymer solution of polyethylene oxide or polyacrylamide in water. Dissipation range Lagrangian statistics such as the rms acceleration of fluid particles and the acceleration autocorrelation are extracted from the trajectories. We compare these statistics with those for pure water. At high enough Re we find the rms acceleration for the polymer solution to be significantly less than that of water. The acceleration autocorrelation function decays more slowly for the polymer solution which indicates a change in the small scales of turbulence. More information is available at http:// milou.msc.cornell.edu/turbulence.html. This work is supported by the NSF under grant PHY9988755.

Mordant, Nicholas; Crawford, Alice; Laporta, Arthur; Bodenschatz, Eberhard

2002-03-01

126

Band anticrossing in dilute nitrides  

SciTech Connect

Alloying III-V compounds with small amounts of nitrogen leads to dramatic reduction of the fundamental band-gap energy in the resulting dilute nitride alloys. The effect originates from an anti-crossing interaction between the extended conduction-band states and localized N states. The interaction splits the conduction band into two nonparabolic subbands. The downward shift of the lower conduction subband edge is responsible for the N-induced reduction of the fundamental band-gap energy. The changes in the conduction band structure result in significant increase in electron effective mass and decrease in the electron mobility, and lead to a large enhance of the maximum doping level in GaInNAs doped with group VI donors. In addition, a striking asymmetry in the electrical activation of group IV and group VI donors can be attributed to mutual passivation process through formation of the nearest neighbor group-IV donor nitrogen pairs.

Shan, W.; Yu, K.M.; Walukiewicz, W.; Wu, J.; Ager III, J.W.; Haller, E.E.

2003-12-23

127

Starting from Scratch: The Decisions, Policies, and Procedures behind Central Piedmont Community College Libraries' Serials Module  

ERIC Educational Resources Information Center

The Central Piedmont Community College Libraries moved from a separately maintained periodicals holdings list to a fully-integrated serials module. Establishing the serials module from scratch required the library to make a series of interrelated decisions beyond the realm of serials management and control. The implications of the serials module…

Arnold, Jennifer

2004-01-01

128

Hardware Implementation of Serially Concatenated PPM Decoder  

NASA Technical Reports Server (NTRS)

A prototype decoder for a serially concatenated pulse position modulation (SCPPM) code has been implemented in a field-programmable gate array (FPGA). At the time of this reporting, this is the first known hardware SCPPM decoder. The SCPPM coding scheme, conceived for free-space optical communications with both deep-space and terrestrial applications in mind, is an improvement of several dB over the conventional Reed-Solomon PPM scheme. The design of the FPGA SCPPM decoder is based on a turbo decoding algorithm that requires relatively low computational complexity while delivering error-rate performance within approximately 1 dB of channel capacity. The SCPPM encoder consists of an outer convolutional encoder, an interleaver, an accumulator, and an inner modulation encoder (more precisely, a mapping of bits to PPM symbols). Each code is describable by a trellis (a finite directed graph). The SCPPM decoder consists of an inner soft-in-soft-out (SISO) module, a de-interleaver, an outer SISO module, and an interleaver connected in a loop (see figure). Each SISO module applies the Bahl-Cocke-Jelinek-Raviv (BCJR) algorithm to compute a-posteriori bit log-likelihood ratios (LLRs) from apriori LLRs by traversing the code trellis in forward and backward directions. The SISO modules iteratively refine the LLRs by passing the estimates between one another much like the working of a turbine engine. Extrinsic information (the difference between the a-posteriori and a-priori LLRs) is exchanged rather than the a-posteriori LLRs to minimize undesired feedback. All computations are performed in the logarithmic domain, wherein multiplications are translated into additions, thereby reducing complexity and sensitivity to fixed-point implementation roundoff errors. To lower the required memory for storing channel likelihood data and the amounts of data transfer between the decoder and the receiver, one can discard the majority of channel likelihoods, using only the remainder in operation of the decoder. This is accomplished in the receiver by transmitting only a subset consisting of the likelihoods that correspond to time slots containing the largest numbers of observed photons during each PPM symbol period. The assumed number of observed photons in the remaining time slots is set to the mean of a noise slot. In low background noise, the selection of a small subset in this manner results in only negligible loss. Other features of the decoder design to reduce complexity and increase speed include (1) quantization of metrics in an efficient procedure chosen to incur no more than a small performance loss and (2) the use of the max-star function that allows sum of exponentials to be computed by simple operations that involve only an addition, a subtraction, and a table lookup. Another prominent feature of the design is a provision for access to interleaver and de-interleaver memory in a single clock cycle, eliminating the multiple clock-cycle latency characteristic of prior interleaver and de-interleaver designs.

Moision, Bruce; Hamkins, Jon; Barsoum, Maged; Cheng, Michael; Nakashima, Michael

2009-01-01

129

Turbulence of Dilute Polymer Solution  

E-print Network

In fully developed three dimensional fluid turbulence the fluctuating energy is supplied at large scales, cascades through intermediate scales, and dissipates at small scales. It is the hallmark of turbulence that for intermediate scales, in the so called inertial range, the average energy flux is constant and independent of viscosity [1-3]. One very important question is how this range is altered, when an additional agent that can also transport energy is added to the fluid. Long-chain polymers dissolved at very small concentrations in the fluid are such an agent [4,5]. Based on prior work by de Gennes and Tabor [6,7] we introduce a theory that balances the energy flux through the turbulent cascade with that of the energy flux into the elastic degrees of freedom of the dilute long-chain polymer solution. We propose a refined elastic length scale, $r_\\varepsilon$, which describes the effect of polymer elasticity on the turbulence energy cascade. Our experimental results agree excellently with this new energy ...

Xi, Heng-Dong; Xu, Haitao

2013-01-01

130

Energy data base. Serial titles with ISSN listing  

SciTech Connect

This issue of Serial Titles with ISSN Listing is the first revision of DOE/TIC-4579 to include the International Standard Serial Number (ISSN) for journals. The TIC journal authority was established to bring about conformity in citing the approximately 16,000 titles contained in this authority. It can prove to be a valuable tool in establishing the precise journal by ISSN and CODEN indication, especially for journals with the same title published in different locations. Serial Titles with ISSN Listing is comprised of two parts. Part 1 is an alphabetical listing by full title of the publication and also includes abbreviated title, CODEN, ISSN, coverage code, and country code. Part 2 is an ISSN-title correlation arranged in numeric order by ISSN and also includes the CODEN and full title.

Hendricks, P.L. (ed.)

1984-03-01

131

21 CFR 864.5240 - Automated blood cell diluting apparatus.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Automated blood cell diluting apparatus. 864.5240 Section...Devices § 864.5240 Automated blood cell diluting apparatus. (a) Identification. An automated blood cell diluting apparatus is a fully...

2010-04-01

132

21 CFR 864.5240 - Automated blood cell diluting apparatus.  

Code of Federal Regulations, 2011 CFR

...2011-04-01 false Automated blood cell diluting apparatus. 864.5240 Section...Devices § 864.5240 Automated blood cell diluting apparatus. (a) Identification. An automated blood cell diluting apparatus is a fully...

2011-04-01

133

21 CFR 864.5240 - Automated blood cell diluting apparatus.  

Code of Federal Regulations, 2012 CFR

...2012-04-01 false Automated blood cell diluting apparatus. 864.5240 Section...Devices § 864.5240 Automated blood cell diluting apparatus. (a) Identification. An automated blood cell diluting apparatus is a fully...

2012-04-01

134

21 CFR 864.5240 - Automated blood cell diluting apparatus.  

Code of Federal Regulations, 2013 CFR

...2013-04-01 false Automated blood cell diluting apparatus. 864.5240 Section...Devices § 864.5240 Automated blood cell diluting apparatus. (a) Identification. An automated blood cell diluting apparatus is a fully...

2013-04-01

135

21 CFR 864.5240 - Automated blood cell diluting apparatus.  

Code of Federal Regulations, 2014 CFR

...2014-04-01 false Automated blood cell diluting apparatus. 864.5240 Section...Devices § 864.5240 Automated blood cell diluting apparatus. (a) Identification. An automated blood cell diluting apparatus is a fully...

2014-04-01

136

Harmonic Syntax in the "Serial" Works of Dmitri Shostakovich  

E-print Network

,” 14#19;. 6 Ibid., 151. 7 Ned Charles Kirk, “Gra]yna %acewic] and Social Realism,” ('MA diss., 8niversity of Washington, 2#19;#19;1), 13. 17 vulgar and without value.”8 In nearly every way serialism broke these strictures with its air... be 19 Schmel], “Listening, Memory, and the Thaw,” 64. 20 Schmel], “Andrey 9olkonsky,” 151. 21 Ibid., 153. 22 Ibid. 21 felt to crystallize around his first serial experiment, the piano piece Musica Stricta, composed in 1956. Describing the work...

Webber, Miriam Brack

2013-05-31

137

In situ serial Laue diffraction on a microfluidic crystallization device.  

PubMed

Renewed interest in room-temperature diffraction has been prompted by the desire to observe structural dynamics of proteins as they function. Serial crystallography, an experimental strategy that aggregates small pieces of data from a large uniform pool of crystals, has been demonstrated at synchrotrons and X-ray free-electron lasers. This work utilizes a microfluidic crystallization platform for serial Laue diffraction from macroscopic crystals and proposes that a collection of small slices of Laue data from many individual crystals is a realistic solution to the difficulties in dynamic studies of irreversible biochemical reactions. PMID:25484843

Perry, Sarah L; Guha, Sudipto; Pawate, Ashtamurthy S; Henning, Robert; Kosheleva, Irina; Srajer, Vukica; Kenis, Paul J A; Ren, Zhong

2014-12-01

138

Impact of dilution on microbial community structure and functional potential: comparison of numerical simulations and batch culture experiments  

NASA Technical Reports Server (NTRS)

A series of microcosm experiments was performed using serial dilutions of a sewage microbial community to inoculate a set of batch cultures in sterile sewage. After inoculation, the dilution-defined communities were allowed to regrow for several days and a number of community attributes were measured in the regrown assemblages. Based upon a set of numerical simulations, community structure was expected to differ along the dilution gradient; the greatest differences in structure were anticipated between the undiluted-low-dilution communities and the communities regrown from the very dilute (more than 10(-4)) inocula. Furthermore, some differences were expected among the lower-dilution treatments (e.g., between undiluted and 10(-1)) depending upon the evenness of the original community. In general, each of the procedures used to examine the experimental community structures separated the communities into at least two, often three, distinct groups. The groupings were consistent with the simulated dilution of a mixture of organisms with a very uneven distribution. Significant differences in community structure were detected with genetic (amplified fragment length polymorphism and terminal restriction fragment length polymorphism), physiological (community level physiological profiling), and culture-based (colony morphology on R2A agar) measurements. Along with differences in community structure, differences in community size (acridine orange direct counting), composition (ratio of sewage medium counts to R2A counts, monitoring of each colony morphology across the treatments), and metabolic redundancy (i.e., generalist versus specialist) were also observed, suggesting that the differences in structure and diversity of communities maintained in the same environment can be manifested as differences in community organization and function.

Franklin, R. B.; Garland, J. L.; Bolster, C. H.; Mills, A. L.

2001-01-01

139

Near critical phase behaviour of dilute mixtures  

NASA Astrophysics Data System (ADS)

Predictions of the limiting phase behaviour of dilute mixtures of n-decane, n-tetradecane, n-octadecane, and n-docosane with n-hexane in the highly compressible region close to the critical point of n-hexane are presented. The predictions are based on a classical Taylor expansion of the Helmholtz energy about the critical point of the solvent [1, 2] and make use of the measured critical properties of the dilute mixtures. The importance of the Krichevskii parameter as a key factor influencing the limiting phase behaviour of dilute mixtures is demonstrated in the case of infinite dilution partition coefficients as well as solute partial molar volumes, and the link to a statistical mechanical description is made.

Gude, Michael T.; Teja, Amyn S.

140

Helium Dilution Cryocooler for Space Applications  

NASA Technical Reports Server (NTRS)

NASA's New Millenium Program Space Technology presents the Helium Dilution Cryocooler for Space Applications. The topics include: 1) Capability; 2) Applications; and 3) Advantages. This paper is in viewgraph form.

Roach, Pat; Hogan, Robert (Technical Monitor)

2001-01-01

141

LLW solidification in cement: Effect of dilution  

SciTech Connect

A simulated Low Level nuclear Waste (LLW) solution was tested for long term solidification in a cement-based matrix. The waste is characterized by high pH and high concentrations of sodium, aluminum, nitrate, nitrite, phosphate and carbonate. The effect of diluting the waste with additional water was studied. The cementitious matrix was composed of cement, fly-ash and clay (21%, 68% and 11% respectively) with high solution to solid ratio (1 liter /1 kg.). Mixes were prepared at 45{degrees}C and cured at 90{degrees}C for 28 days. Maximum 28 day compressive strengths and early age heat evolution were achieved by diluting the LLW solution to approximately 67% of its original concentration. More dilution led to a lower heat evolution and compressive strength. No dilution was found to give lower compressive strength, and a heat evolution that was delayed, and lower in intensity. XRD spectra showed formation of zeolites and tobermorite at the higher concentrations (67, 85, and 100% of the concentration of the undiluted simulated LLW), with a change from Na-Pl zeolite for 67% of the undiluted concentration to a sodalite at 100%. SEM observations showed a porous system for the low and high dilution rates but a less porous one for an intermediate level of dilution.

Kruger, A.A. [Westinghouse Hanford Co., Richland, WA (United States); Katz, A.; Brough, A.R.; Bakharev, T.; Kirkpatrick, R.J.; Struble, L.J.; Young, J.F. [Univ. of Illinois at Urbana-Champaign, IL (United States). Center for Advanced Cement Based Materials

1995-02-01

142

Automated matching and segmentation of lymphoma on serial CT examinations  

Microsoft Academic Search

In patients with lymphoma, identification and quantification of the tumor extent on serial CT examinations is critical for assessing tumor response to therapy. In this paper, we present a computer method to automatically match and segment lymphomas in follow-up CT images. The method requires that target lymph nodes in baseline CT images be known. A fast, approximate alignment technique along

Jiayong Yan; Binsheng Zhao; Sean Curran; Andrew Zelenetz; Lawrence H. Schwartz

2007-01-01

143

The second STEP: the feasibility of repeat serial transverse enteroplasty  

Microsoft Academic Search

Background: Serial transverse enteroplasty (STEP) lengthens and tapers dilated bowel. Redilation of the STEP segment occurs in some patients with intestinal failure. The feasibility of a repeat STEP procedure in a pig model is evaluated. Methods: Six pigs underwent reversal of an intestinal segment distal to the ligament of Treitz. At 6-week intervals after reversal, each animal had 2 STEP

Hannah Piper; Biren P. Modi; Heung Bae Kim; Dario Fauza; John Glickman; Tom Jaksic

144

Picture Detection in Rapid Serial Visual Presentation: Features or Identity?  

ERIC Educational Resources Information Center

A pictured object can be readily detected in a rapid serial visual presentation sequence when the target is specified by a superordinate category name such as "animal" or "vehicle". Are category features the initial basis for detection, with identification of the specific object occurring in a second stage (Evans & Treisman, 2005), or is…

Potter, Mary C.; Wyble, Brad; Pandav, Rijuta; Olejarczyk, Jennifer

2010-01-01

145

Making serial number based authentication robust against loss of state  

Microsoft Academic Search

In this paper a novel method for making serial number based authentication protocols resilient against database failure is described. The method is applicable to the situation where a single server wishes to authenticate itself to a number of clients, but cannot reliably maintain a sequence number database. The solution has recently been included in a draft international standard for third

Chris J. Mitchell

2000-01-01

146

Allocation of buffers to serial production lines with bottlenecks  

Microsoft Academic Search

The optimal placement of a predetermined amount of buffer capacity in balanced serial production lines is a well-understood problem: in lines with moderate variability, the optimal allocation involves equal numbers of buffers at each site; in lines with severe variability, the equal allocation is modified slightly to place more buffers toward the center of the line. Buffering unbalanced lines is

STEPHEN G. POWELL; DAVID F. PYKE

1996-01-01

147

Nymphalid eyespot serial homologues originate as a few individualized modules.  

PubMed

Serial homologues are repeated traits that share similar development but occur in different parts of the body. Variation in number of repeats accounts for substantial diversity in animal form and considerable work has focused on identifying the factors accounting for this variation. Little is known, however, about how serial homologues originally become repeated, or about the relative timing of repeat individuation relative to repeat origin. Here, we show that the serially repeated eyespots on nymphalid butterfly wings most likely arose as a small cluster of units on the ventral hindwing that were later co-opted to the dorsal and anterior wing surfaces. Based on comparative analyses of over 400 species, we found support for a model of eyespot origin followed by redeployment, rather than by the conventional model, where eyespots arose as a complete row of undifferentiated units that later gained individuation. In addition, eyespots most likely evolved from simpler pattern elements, single-coloured spots, which were already individuated among different wing sectors. Finally, the late appearance of eyespots on the dorsal, hidden wing surface further suggests that these novel complex traits originally evolved for one function (thwarting predator attacks) and acquired a second function (sexual signalling) when moved to a different body location. This broad comparative analysis illustrates how serial homologues may initially evolve as a few units serving a particular function and subsequently become repeated in novel body locations with new functions. PMID:24870037

Oliver, Jeffrey C; Beaulieu, Jeremy M; Gall, Lawrence F; Piel, William H; Monteiro, Antónia

2014-07-22

148

Serial Learning in Rats: A Test of Three Hypotheses  

ERIC Educational Resources Information Center

Findings obtained by providing rats with a single fixed series of events, A-B-C-..., often are equally compatible with three alternative serial learning interpretations: that the signal for items is (A) their position in the series (position view), (B) the prior item of the series (chaining view), and (C) one, two, or more prior items of the…

Capaldi, E. J.; Miller, Ronald Mellado

2004-01-01

149

Can serial rapists be distinguished from one-off rapists?  

PubMed

There are investigative advantages to being able to determine early in a police investigation whether a rape has been committed by a serial or a one-off rapist. Previous research has found some differences in the crime-scene behaviors of serial and one-off rapists; however, this research suffers from the limitation of utilizing a sample of rapes within which there was a mixture of victim-offender relationships. To address this limitation, this study sampled 38 serial (two or more convictions) and 50 one-off (one conviction) stranger rapists and compared their crime scene behavior across four domains (control, sex, escape and style behaviors). Serial and one-off rapists differed in some control and sexual behaviors, in particular, in the type of victim targeted, the offense locations, methods of control and the sexual acts forced upon the victim. However, the results did not indicate a striking difference in the offending behavior of the two groups. The implications of these findings for criminal investigations are discussed. PMID:24723507

Slater, Chelsea; Woodhams, Jessica; Hamilton-Giachritsis, Catherine

2014-01-01

150

Union List of Serials in Pacific Island Libraries.  

ERIC Educational Resources Information Center

This union list contains the serial holdings from Pacific Island libraries, including the University of the South Pacific Library (Fiji), the University of Guam Robert F. Kennedy Library, Guam Public Library, College of Micronesia-FSM Library, College of the Marshall Islands Library, Micronesian Seminar Library, Palau Community College Library,…

Cohen, Arlene G., Comp.; Yoshida, Patricia, Comp.

151

Phosphorus and calcium retention in serially harvested cattle  

Technology Transfer Automated Retrieval System (TEKTRAN)

Data from 3 serial harvest trials were utilized to calculate phosphorus and calcium retention in cattle. Trial 1 evaluated three rates of gain during a growing period followed by a common finishing diet utilizing British crossbred steers. Four steers were harvested from each treatment following th...

152

The simultaneous chain: a new approach to serial learning  

Microsoft Academic Search

Recent advances have allowed the application of behaviorism's rigor to the control of complex cognitive tasks in animals. This article examines recent research on serially organized behavior in animals. 'Chaining theory', the traditional approach to the study of such behavior, reduces intelligent action to sequences of discrete stimulus-response units in which each overt response is evoked by a particular stimulus.

Herbert S. Terrace

2005-01-01

153

Multiagent supervisory control for antifault propagation in serial production systems  

Microsoft Academic Search

In this paper, a multiagent supervisory control methodology is proposed for antifault propagation in serial production systems by incorporating the idea of multiagent control within the fault-tolerant supervisory control scheme. Especially, the concept of antifault propagation between cascaded processes is established and the synthesis of agent supervisors is investigated based on this concept. A case study of a polypropylene polymerization

Kwang-Hyun Cho; Jong-Tae Lim

2001-01-01

154

Counterbalancing for Serial Order Carryover Effects in Experimental Condition Orders  

ERIC Educational Resources Information Center

Reactions of neural, psychological, and social systems are rarely, if ever, independent of previous inputs and states. The potential for serial order carryover effects from one condition to the next in a sequence of experimental trials makes counterbalancing of condition order an essential part of experimental design. Here, a method is proposed…

Brooks, Joseph L.

2012-01-01

155

Serial Block-Face Scanning Electron Microscopy to Reconstruct  

E-print Network

of a scanning electron microscope. Backscattering contrast is used to visualize the heavy-metal stainingSerial Block-Face Scanning Electron Microscopy to Reconstruct Three-Dimensional Tissue at electron microscopic, and tissue at light-microscopic resolution. A gap exists, however, when 3D tissue

Born, Richard

156

Effects of Serial and Concurrent Training on Acquisition and Generalization  

ERIC Educational Resources Information Center

Despite a large body of research demonstrating that generalization to novel stimuli can be produced by training sufficient exemplars, the methods by which exemplars can be trained remain unclear. The purpose of the current study was to evaluate 2 methods, serial and concurrent presentation of stimuli, to train sufficient exemplars. Five preschool…

Wunderlich, Kara L.; Vollmer, Timothy R.; Donaldson, Jeanne M.; Phillips, Cara L.

2014-01-01

157

Serials Management by Microcomputer: The Potential of DBMS.  

ERIC Educational Resources Information Center

Describes serials management at Philadelphia College of Textiles and Science library via a microcomputer, a file manager called PFS, and a relational database management system called dBase II. Check-in procedures, programing with dBase II, "static" and "active" databases, and claim procedures are discussed. Check-in forms are included. (EJS)

Vogel, J. Thomas; Burns, Lynn W.

1984-01-01

158

SHORT COMMUNICATION Characterisation of serial order encoding in monkey anterior  

E-print Network

SHORT COMMUNICATION Characterisation of serial order encoding in monkey anterior cingulate sulcus working memory task with only one component. Methods Two male rhesus monkeys (M and P) were trained to sit were recorded in monkey M using the scleral search coil technique. A moving eye-position window centred

Paris-Sud XI, Université de

159

DC and RF Measurements of Serial Bi-SQUID Arrays  

E-print Network

SQUID arrays are promising candidates for low profile antennas and low noise amplifier applications. We present the integrated circuit designs and results of DC and RF measurements of the wideband serial arrays based on integration of linear bi-SQUID cells forming a Superconducting Quantum Interference Filter (bi-SQUID SQIF). Various configurations of serial arrays designs are described. The measured linearity, power gain, and noise temperature are analyzed and compared. The experimental results are matched to results of mathematical modeling. A serial bi-SQUID SQIF arrays are mounted into a coplanar waveguide (CPW) and symmetrically grounded to corresponding sides of CPW. The RF output comes out from the central common line, which is also used for DC biasing and forms a symmetrical balanced output. The signal and DC flux biasing line is designed as coplanar lines passed in parallel over each bi-SQUID cell in a bidirectional fashion concentrating magnetic flux inside of each cell. Serial bi-SQUID SQIF arrays ...

Prokopenko, G V; de Escobar, A Leese; Taylor, B; de Andrade, M C; Berggren, S; Longhini, P; Palacios, A; Nisenoff, M; Fagaly, R L

2012-01-01

160

Active accumulation of very diluted biomolecules by nano-dispensing for easy detection below the femtomolar range  

NASA Astrophysics Data System (ADS)

Highly sensitive detection of biomolecules is of paramount interest in many fields including biomedicine, safety and eco-pollution. Conventional analyses use well-established techniques with detection limits ~1?pM. Here we propose a pyro-concentrator able to accumulate biomolecules directly onto a conventional binding surface. The operation principle is relatively simple but very effective. Tiny droplets are drawn pyro-electro-dynamically and released onto a specific site, thus increasing the sensitivity. The reliability of the technique is demonstrated in case of labelled oligonucleotides diluted serially. The results show the possibility to detect very diluted oligonucleotides, down to a few hundreds of attomoles. Excellent results are shown also in case of a sample of clinical interest, the gliadin, where a 60-fold improved detection limit is reached, compared with standard ELISA. This method could open the way to a mass-based technology for sensing molecules at very low concentrations, in environmental as well as in diagnostics applications.

Grilli, S.; Miccio, L.; Gennari, O.; Coppola, S.; Vespini, V.; Battista, L.; Orlando, P.; Ferraro, P.

2014-11-01

161

75 FR 52917 - Defense Federal Acquisition Regulation Supplement (DFARS); Warranty Tracking of Serialized Items...  

Federal Register 2010, 2011, 2012, 2013, 2014

...by revising the clause date to read ``(XXX 2010)'' and, at paragraph (a), by...Warranty Tracking of Serialized Items (XXX 2010) (a) Definition. ``Unique item...Warranty Tracking of Serialized Items (XXX 2010) (a) Definitions. As used in...

2010-08-30

162

A systematic approach for design of digit-serial signal processing architectures  

Microsoft Academic Search

A systematic unfolding transformation technique for transforming bit-serial architecture into equivalent digit-serial ones is presented. The novel feature of the unfolding technique lies in the generation of functionally correct control circuits in the digit-serial architectures. For some applications bit-serial architectures may be too slow, and bit-parallel architectures may be faster than necessary and may require too much hardware. The desired

Keshab K. Parhi

1991-01-01

163

Serial-Order Short-Term Memory Predicts Vocabulary Development: Evidence from a Longitudinal Study  

ERIC Educational Resources Information Center

Serial-order short-term memory (STM), as opposed to item STM, has been shown to be very consistently associated with lexical learning abilities in cross-sectional study designs. This study investigated longitudinal predictions between serial-order STM and vocabulary development. Tasks maximizing the temporary retention of either serial-order or…

Leclercq, Anne-Lise; Majerus, Steve

2010-01-01

164

Serialized TID numbers - A headache or a blessing for RFID crackers?  

Microsoft Academic Search

Though transponder ID (TID) numbers of RFID tags were originally introduced to identify the chip model, serialized TID numbers are currently advertised as security features of UHF chips. Serialized TID numbers do not provide any cryptographic protection, but they do introduce a practical hurdle against adversaries who want to clone RFID tags today. Furthermore, serialized TID numbers are important for

Mikko Lehtonen; Antti Ruhanen; Florian Michahelles; Elgar Fleisch

2009-01-01

165

Serialized TID Numbers - A Headache or a Blessing for RFID Crackers?  

Microsoft Academic Search

Though transponder ID (TID) numbers of RFID tags were originally introduced to identify the chip model, serialized TID numbers are currently advertised as security features of UHF chips. Serialized TID numbers do not provide any cryptographic protection, but they do introduce a practical hurdle against adversaries who want to clone RFID tags today. Furthermore, serialized TID numbers are important for

Mikko Lehtonen; Antti Ruhaneny; Florian Michahelles; Elgar Fleischz

166

Haptic Rendering of Topological Constraints to Users Manipulating Serial Virtual Linkages  

E-print Network

Haptic Rendering of Topological Constraints to Users Manipulating Serial Virtual Linkages Daniela-- This paper presents an approach for haptic rendering of topological constraints to users operating serial that they manipulate. Index Terms-- topological constraints, serial linkage, physically-based simulation, haptic

Constantinescu, Daniela

167

Building a Serials Database on NOTIS at the University of Louisville  

Microsoft Academic Search

The implementation of the NOTIS system at the University of Louisville Libraries has introduced various changes to Serials cataloging in Ekstrom Library. An initial goal was to provide a clean database, containing all currently received serial titles. The decision by Ekstrom Library to maintain a permanent order record on the current title necessitates frequent record manipulation as serial titles change.

Tyler Goldberg; Pamela Burton

1990-01-01

168

Mossbauer effect in dilute iron alloys  

NASA Technical Reports Server (NTRS)

The effects of variable concentration, x, of Aluminum, Germanium, and Lanthanum atoms in Iron lattice on various Mossbauer parameters was studied. Dilute binary alloys of (Fe-Al), (Fe-Ge), (Fe-Al) containing up to x = 2 a/o of the dilute constituent were prepared in the form of ingots and rolled to a thickness of 0.001 in. Mossbauer spectra of these targets were then studied in transmission geometry to measure changes in the hyperfine field, peak widths isomer shifts as well as the ratio of the intensities of peaks (1,6) to the intensities of peaks (2,5). It was shown that the concept of effective hyperfine structure field in very dilute alloys provides a useful means of studying the effects of progressively increasing the solute concentration on host lattice properties.

Singh, J. J.

1975-01-01

169

Insect morphological diversification through the modification of wing serial homologs.  

PubMed

Fossil insects living some 300 million years ago show winglike pads on all thoracic and abdominal segments, which suggests their serial homology. It remains unclear whether winglike structures in nonwinged segments have been lost or modified through evolution. Here, we identified a ventral lateral part of the body wall on the first thoracic segment, the hypomeron, and pupal dorsolateral denticular outgrowths as wing serial homologs in the mealworm beetle Tenebrio molitor. Both domains transform into winglike structures under Hox RNA interference conditions. Gene expression and functional analyses revealed central roles for the key wing selector genes, vestigial and scalloped, in the hypomeron and the denticular outgrowth formation. We propose that modification, rather than loss, of dorsal appendages has provided an additional diversifying mechanism of insect body plan. PMID:23493422

Ohde, Takahiro; Yaginuma, Toshinobu; Niimi, Teruyuki

2013-04-26

170

Molluscan engrailed expression, serial organization, and shell evolution  

NASA Technical Reports Server (NTRS)

Whether the serial features found in some molluscs are ancestral or derived is considered controversial. Here, in situ hybridization and antibody studies show iterated engrailed-gene expression in transverse rows of ectodermal cells bounding plate field development and spicule formation in the chiton, Lepidochitona cavema, as well as in cells surrounding the valves and in the early development of the shell hinge in the clam, Transennella tantilla. Ectodermal expression of engrailed is associated with skeletogenesis across a range of bilaterian phyla, suggesting a single evolutionary origin of invertebrate skeletons. The shared ancestry of bilaterian-invertebrate skeletons may help explain the sudden appearance of shelly fossils in the Cambrian. Our interpretation departs from the consideration of canonical metameres or segments as units of evolutionary analysis. In this interpretation, the shared ancestry of engrailed-gene function in the terminal/posterior addition of serially repeated elements during development explains the iterative expression of engrailed genes in a range of metazoan body plans.

Jacobs, D. K.; Wray, C. G.; Wedeen, C. J.; Kostriken, R.; DeSalle, R.; Staton, J. L.; Gates, R. D.; Lindberg, D. R.

2000-01-01

171

Plastic optical fiber serial communications link for distributed control system  

NASA Astrophysics Data System (ADS)

One of the most common interface for communications specified is RS 232C standard. Though widely accepted, RS232 has limited transmission speed, range and networking capabilities. RS 422 standard overcomes limitations by using differential signal lines. In automation of the operation of gas discharge lasers, multiple processors are used for control of lasers, cooling system, vacuum system etc. High EMI generated by lasers interfere through galvanic transmission or by radiation over the length of cables, and hang up operation of processors or control PC. A serial communications link was designed eliminating copper transmission media, using plastic optical fiber cables and components, to connect local controllers with the master PC working on RS232 protocols. The paper discusses the design and implementation of a high ly reliable EMI harden serial communications link.

Saxena, Piyush; Sharangpani, K. K.; Vora, H. S.; Nakhe, S. V.; Jain, R.; Shenoy, N. M.; Bhatnagar, R.; Shirke, N. D.

2001-09-01

172

Serial analysis of gene expression (SAGE) in rat liver regeneration  

Microsoft Academic Search

We have applied serial analysis of gene expression for studying the molecular mechanism of the rat liver regeneration in the model of 70% partial hepatectomy. We generated three SAGE libraries from a normal control liver (NL library: 52,343 tags), from a sham control operated liver (Sham library: 51,028 tags), and from a regenerating liver (PH library: 53,061 tags). By SAGE

Velasco. Cimica; Danko Batusic; Borislava Haralanova-Ilieva; Yonglong Chen; Thomas Hollemann; Tomas Pieler; Giuliano Ramadori

2007-01-01

173

Creating a Serial Database Using Subscription Agency Files  

Microsoft Academic Search

Subscription agency invoice files on diskette can be transferred into standard microcomputer database management packages to provide libraries with a fast low-cost serials database useful for various public or technical service functions and for management decision-making. Specific procedures are detailed for producing such a database using EBSCO Subscription Services invoice diskettes and the PC-File III and dBASE III PLUS database

Susan A. Cady

1988-01-01

174

Overlapping mental operations in serial performance with preview  

Microsoft Academic Search

Dual-task research has revealed a response-selection bottleneck: response selection cannot occur simultaneously in two different tasks, though perceptual processing may overlap response selection (Welford, 1952; Pashler & Johnston, 1989). In serial performance with preview, the same task is performed repeatedly, but stimuli are available well before response. Does the dual-task bottleneck limit the rate of responding in this situation, despite

Harold Pashler

1994-01-01

175

Two Serial Data to Pulse Code Modulation System Interfaces  

NASA Technical Reports Server (NTRS)

Two pulse code modulation (PCM) system interfaces for asynchronous serial data are described. One interface is for global positioning system (GPS) data on the NASA Dryden Flight Research Center (DFRC) F-15B (McDonnell Douglas Corporation, St. Louis, Missouri) airplane, tail number 836 (F-15B/836). The other is for flight control computer data on the duPont Aerospace (La Jolla, California) DP-1, a 53-percent scale model of the duPont Aerospace DP-2.

Hamory, Phil

2006-01-01

176

Natural History of Stenosis From Intracranial Atherosclerosis by Serial Angiography  

Microsoft Academic Search

Background and Purpose—Knowledge of the natural history of stenoses due to intracranial atherosclerosis may be useful for evaluating possible treatments such as angioplasty. Methods—We retrospectively reviewed records over a 7-year period to identify patients with intracranial atherosclerotic stenoses and serial angiograms. Quantitative measurements of stenoses were made in a blinded manner, and clinical outcomes were reviewed. Results—We identified 21 patients

Paul T. Akins; Thomas K. Pilgram; DeWitte T. Cross III; Christopher J. Moran

177

DT-bottlenecks in serial production lines: theory and application  

Microsoft Academic Search

The bottleneck (BN) of a production line is a machine that impedes the system's performance in the strongest manner. It has been shown in the previous work that the so-called down- time bottlenecks (DT-BNs) are of main industrial importance. In this paper, a method for DT-BN identification is developed in the framework of serial production lines with unreliable (Markovian) machines

Shu-Yin Chiang; Chih-Tsung Kuo; Semyon M. Meerkov

2000-01-01

178

The "dilution effect" in stallion sperm.  

PubMed

Dilution of semen to less than 20 × 10(6) sperm/mL has been reported to decrease sperm quality in multiple species, a phenomenon known as the semen "dilution effect." Critical evaluation of stallion semen diluted to these concentrations, however, has not been reported. This study evaluated sperm motion characteristics (percent total motility [TMOT], percent progressive motility [PMOT], curvilinear velocity [?m/s], and percent straightness) and plasma membrane integrity (percent plasma membrane intact [PMI]) in semen samples diluted to 2.5 × 10(6) sperm/mL with the addition of 0%, 7.5%, or 25% seminal plasma (groups T-2.5/0, T-2.5/7.5, and T-2.5/25, respectively), or after simple dilution to 30 × 10(6) sperm/mL (group T-30), or simple dilution to a ratio of 3:1 (extender:semen; group T-3:1SD). Evaluations were performed immediately after semen collection (T0), and after 24 and 48 hours of cooled storage (T24 and T48, respectively). The PMI and TMOT were the highest in group T-3:1SD at T0. At T24, the PMI in groups T-30, T3:1SD and T3:1/30, and T-2.5/0 were higher than that in the other groups (P < 0.05), whereas TMOT in group T-3:1SD was higher (P < 0.05) than that in all other groups except T-30. By T48, no difference was detected for PMI among groups T-3:1SD, T-30, and T-2.5/0; for TMOT among groups T-3:1SD, T-30, and T-2.5/0, and T-2.5/7.5 (P > 0.05), whereas PMOT was the highest in groups T-2.5/0 and T-2.5/7.5 (P < 0.05). These findings revealed that treatments in which semen was diluted to a concentration of 2.5 × 10(6) sperm/mL had lower initial PMI, TMOT, and PMOT, but semen quality did not decline after 24 and 48 hours of cooled storage. In this study, TMOT and PMI in dilute semen were less than those in more concentrated semen at T0. This effect, while significant, was small and less apparent after cooled storage. PMID:25543156

Hayden, Shelby S; Blanchard, Terry L; Brinsko, Steven P; Varner, Dickson D; Hinrichs, Katrin; Love, Charles C

2015-03-01

179

The Effect of Concurrent Semantic Categorization on Delayed Serial Recall  

PubMed Central

The influence of semantic processing on the serial ordering of items in short-term memory was explored using a novel dual-task paradigm. Subjects engaged in two picture judgment tasks while simultaneously performing delayed serial recall. List material varied in the presence of phonological overlap (Experiments 1 and 2) and in semantic content (concrete words in Experiment 1 and 3; nonwords in Experiments 2 and 3). Picture judgments varied in the extent to which they required accessing visual semantic information (i.e., semantic categorization and line orientation judgments). Results showed that, relative to line orientation judgments, engaging in semantic categorization judgments increased the proportion of item ordering errors for concrete lists but did not affect error proportions for nonword lists. Furthermore, although more ordering errors were observed for phonologically similar relative to dissimilar lists, no interactions were observed between the phonological overlap and picture judgment task manipulations. These results thus demonstrate that lexical-semantic representations can affect the serial ordering of items in short-term memory. Furthermore, the dual-task paradigm provides a new method for examining when and how semantic representations affect memory performance. PMID:21058880

Acheson, Daniel J.; MacDonald, Maryellen C.; Postle, Bradley R.

2010-01-01

180

Highly Reliable, High-Speed, Unidirectional Serial Data Links  

NASA Technical Reports Server (NTRS)

Highly reliable, high-speed, unidirectional serial data-communication subsystems have been proposed to be installed in an upgrade of the computing systems aboard the space shuttles. The basic design concept of these serial data links is also adaptable to terrestrial use in applications in which there are requirements for highly reliable serial data communications. The hardware and software aspects of the architecture of the data links are dictated largely by a requirement, in the original space-shuttle application, for one computer to monitor the memory transactions and memory contents of other computers in real time with high reliability and without reliance on requests for retransmission. To minimize weight while affording a capability to transfer data at a required rate of 2.56 x 10(exp 8) bits per second, it was decided that the links would be serial ones of the fiber-channel type. [Fiber channel denotes a type of serial computer bus that is used to connect a computer (usually a supercomputer) with a high-speed data storage device. Depending on the specific application, the physical connection between the transmitter and receiver could be made via an optical fiber or a twisted pair of wires.] Heretofore, fiber-channel links have ordinarily been bidirectional and have operated under protocols that provide for receiving stations to detect errors and request retransmission when necessary. In the present case, the time taken by processing to request retransmission would conflict with the requirement for real-time transfer of data. To ensure reliability without retransmission, a link according to the proposal would utilize a modified version of the normal fiberchannel character set in conjunction with forward error correction by means of a Reed-Solomon code (see figure). The Reed-Solomon encoding and decoding and the translations between the normal and modified character sets would be effected by logic circuitry external to the fiber-channel transmitter and receiver, which would be commercial off-the-shelf units. The receiving end of the link could detect and correct errors at a rate as high as 4 million times per second, if necessary. The receiver detects uncorrectable double-byte errors. It has been estimated that uncorrectable-error rate would amount to one failure in about 10(exp 19) characters.

Cole, Robert M.; Bishop, Jamie

2005-01-01

181

Automatic dilution gaging of rapidly varying flow  

USGS Publications Warehouse

Obtaining discharge ratings at urban gaging stations is often difficult. Results of using an automated constant-rate dye-dilution technique to measure discharge at two sites in Madison, Wisconsin, are presented. The sites selected have well-defined stage-discharge ratings, developed during previous hydrologic studies. One site is a 60-inch-diameter concrete storm sewer and the other a concrete-lined open trapezoidal channel. Equipment selected to automate the method included a portable automatic water sampler, four-channel event recorder; and for dye injection, a peristaltic pump. An electrical switching circuit was designed to coordinate the operation of the water sampler, injection pump, and four-channel recorder. During the data-collection period of 1 year, a total of 20 storms was monitored. The analyses showed that the discharges measured by dye-dilution techniques ranged from + or - 5 to + or - 10 percent of the discharges determined from ratings established by current-meter measurements. Larger differences were noted at the start of and on the rising limb of four hydrographs. Of the 20 storms monitored, 17 produced acceptable results. Peak discharges by the dilution method at the open-channel site ranged from 0 to 12 percent departures from the existing rating, whereas the peak discharge by the dilution method at the storm-sewer site ranged from 0 to 5 percent departures from the existing rating. (UGGS)

Duerk, M.D.

1983-01-01

182

THE MOST DILUTE LAKE IN THE WORLD?  

EPA Science Inventory

Lake Notasha, near the crest of the Oregon Cascade mountain range, is the most dilute lake known. he measured conductivity during two visits was 1.3 and 1.6 uS cm-1, with a sum of base cations of 9 and 18 ueq L-1; bicarbonate was the dominant anion. ost of the cations in the lake...

183

Dissipative stresses in dilute polymer solutions  

Microsoft Academic Search

Planar extensional flows of a dilute polymer solution are investigated using a free-draining bead-rod model. For steady flows, an analytic expression for the probability density of the polymer configuration is available. It is found that part of the associated steady polymer stress is unambiguously viscous at all time scales, in the sense that on cessation of flow it disappears instantaneously,

J. M. Rallison

1997-01-01

184

Science Sampler: Dilution, Concentration, and Flotation  

NSDL National Science Digital Library

Classroom teaching practice and literature show that many students have difficulties with science concepts such as density. These investigations identify the relationship between density and floating through experimenting with successive dilution of a liquid, or the systematic change of concentration of a saltwater solution. The lessons follow the constructivist teaching model--invitation, exploration, proposing explanations, and taking action.

Joseph S. Schmuckler

2004-04-01

185

AN INITIAL DILUTION ZONE IMPACT ASSESSMENT  

E-print Network

TECHNICAL REPORT SERIES FREMP WQWM 93-06 DOE FRAP 1993-14 Prepared for FREMP Water Quality/Waste Management estuary (Technical report serices; WQWM 93-06) (Technical report series; DOE FRAP 1993-14) Includes FRAP 1993-14. TD227.F7N67 1993 363.73'942'0971133 C93-960027-X #12;INITIAL DILUTION ZONE IMPACT

186

Zinc oxide based diluted magnetic semiconductors  

Microsoft Academic Search

During my graduate research I have synthesized materials known as diluted magnetic semiconductors (DMS) as epitaxial thin film structures using the process of pulsed laser deposition (PLD). These materials are envisioned to be of importance in the emerging field of spintronics where the charge as well as the spin of the charge carriers can be combined to yield unique functionalities

Shivaraman Ramachandran

2007-01-01

187

Sulfuric Acid and Water: Paradoxes of Dilution  

ERIC Educational Resources Information Center

On equilibrium properties of aqueous solutions of sulfuric acid, Julius Thomsen has marked that the heat evolved on diluting liquid sulfuric acid with water is a continuous function of the water used, and excluded absolutely the acceptance of definite hydrates as existing in the solution. Information about thermochemical measurement, a discussion…

Leenson, I. A.

2004-01-01

188

LAKE RESTORATION BY DILUTION: MOSES LAKE, WASHINGTON  

EPA Science Inventory

Dilution water, low in macronutrients, was added to Moses Lake on three occasions in 1977 and once in 1978 during the spring-summer period. The addition resulted in reducing the annual average inflow concentration of phosphorus from about 130-140 micrograms/l to 100 micrograms/l....

189

Safety of serial MRI in patients with implantable cardioverter defibrillators  

PubMed Central

Objective While patients with cardiac implantable electronic devices could benefit from magnetic resonance (MR) imaging, the presence of such devices has been designated as an absolute contraindication to MR. Although scanning algorithms are proposed for cardiac implantable electronic devices, their safety remains uncertain. To address this issue, the safety of serial cardiac MR scans was evaluated in patients with implantable cardioverter defibrillators (ICDs). Methods Three serial cardiac MR scans were prospectively performed at 1.5 T on 10 patients (9 men) of median age 56 years (range 51–68) with ICDs. ICD interrogation was performed before and after the MR scan and at a follow-up of median 370 days (range 274–723). Image quality was also assessed. Results In all patients MR scanning occurred without complications. There were no differences between preand post-MR pacing capture threshold, pacing lead or high voltage lead impedance, or battery voltage values. During follow-up there were no occurrences of ICD dysfunction. Although most patients had image artifacts, the studies were generally diagnostic regarding left ventricular function and wall motion. Delayed enhancement imaging was of good quality for inferior wall and inferolateral infarcts, but ICD artifacts often affected the imaging of anterior wall infarcts. Conclusion Serial MR scans at 1.5 T in patients with ICDs, when carefully performed in a monitored setting, have no adverse effects on either patient or device. When required, single or multiple MR scans at 1.5 T may therefore be considered for clinical diagnostic purposes in these patients. PMID:21873440

Junttila, M Juhani; Fishman, Joel E; Lopera, Gustavo A; Pattany, Pradip M; Velazquez, Darcy L; Williams, Adam R; Trachtenberg, Barry H; Sanina, Cristina; Mather, Jacques; Hare, Joshua M

2014-01-01

190

Serial Gene Expression Profiling in the Intact Human Heart  

PubMed Central

Background In chronic heart failure due to a dilated cardiomyopathy phenotype, the molecular bases for contractile dysfunction and chamber remodeling remain largely unidentified. Methods To investigate the feasibility of measuring global gene expression serially in the intact failing human heart, we performed repeated messenger RNA (mRNA) expression profiling using RNA extracted from endomyocardial biopsy specimens and gene chip methodology in 8 subjects with idiopathic dilated cardiomyopathy. In patients treated with ?-blocking agents or placebo, myocardial gene expression was measured in endomyocardial biopsy material and radionuclide ejection fraction was measured at baseline and after 4 to 12 months of treatment. Gene expression was measured for 12,625 gene sequences by using Affymetrix U95 gene chips and commercially available software. For 6 mRNAs, gene chip results were compared with measurements made by quantitative reverse transcriptase-polymerase chain reaction (RT-PCR). Results In an unfiltered composite analysis of changes in expression detected in the patients with high-signal intensity chips, 241 genes showed an increase and 331 genes a decrease in mRNA abundance. There was good agreement between changes measured by quantitative RT-PCR and those determined by gene chips. There was less variance between differences in phenotype in patients sampled serially as compared between subjects with similar phenotypes sampled at baseline. Conclusions Serial gene expression profiling with association to phenotypic change is feasible in the intact human heart and may offer advantages to cross-sectional expression profiling. This study suggests that the intact failing remodeled human heart is in an activated state of gene expression, with a large net reduction in gene expression occurring as phenotypic improvement occurs. J Heart Lung Transplant 2006;25:579 – 88. Copyright © 2006 by the International Society for Heart and Lung Transplantation. PMID:16678038

Lowes, Brian D.; Zolty, Ronald; Minobe, Wayne A.; Robertson, Alastair D.; Leach, Sonia; Hunter, Lawrence; Bristow, Michael R.

2009-01-01

191

40 CFR 1065.667 - Dilution air background emission correction.  

Code of Federal Regulations, 2011 CFR

... 2011-07-01 false Dilution air background emission correction...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS ENGINE-TESTING PROCEDURES...Requirements § 1065.667 Dilution air background emission...

2011-07-01

192

40 CFR 1065.667 - Dilution air background emission correction.  

Code of Federal Regulations, 2013 CFR

... 2013-07-01 false Dilution air background emission correction...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS ENGINE-TESTING PROCEDURES...Requirements § 1065.667 Dilution air background emission...

2013-07-01

193

40 CFR 1065.667 - Dilution air background emission correction.  

Code of Federal Regulations, 2010 CFR

... 2010-07-01 false Dilution air background emission correction...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS ENGINE-TESTING PROCEDURES...Requirements § 1065.667 Dilution air background emission...

2010-07-01

194

40 CFR 1065.667 - Dilution air background emission correction.  

Code of Federal Regulations, 2012 CFR

... 2012-07-01 false Dilution air background emission correction...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS ENGINE-TESTING PROCEDURES...Requirements § 1065.667 Dilution air background emission...

2012-07-01

195

40 CFR 1066.610 - Dilution air background correction.  

Code of Federal Regulations, 2014 CFR

... 2014-07-01 false Dilution air background correction. 1066.610...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS VEHICLE-TESTING PROCEDURES...Calculations § 1066.610 Dilution air background correction....

2014-07-01

196

40 CFR 1065.667 - Dilution air background emission correction.  

Code of Federal Regulations, 2014 CFR

... 2014-07-01 false Dilution air background emission correction...ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR POLLUTION CONTROLS ENGINE-TESTING PROCEDURES...Requirements § 1065.667 Dilution air background emission...

2014-07-01

197

A Classic Case of Serial Murder Forensics Meets Photonics  

NSDL National Science Digital Library

In this case study, a newly appointed medical examiner uncovers an unusual trend in drowning cases, which she suspects may be the work of a serial murderer. To prove that she is right, she must rely on instrumentation designed and tested by a team of students from the local university. Students read the case, then design and build a device for the detection of blood stains. The case was developed for use in an undergraduate laboratory course sequence in photonics for junior and senior level students. It would be suitable for any undergraduate course in physics, chemistry, or electrical engi eering that covers topics in optics, photonics, or spectroscopy.

Altendorf, Karen; Cheville, Alan

2005-01-01

198

Hi-speed versatile serial crate controller for CAMAC  

SciTech Connect

A serial crate controller, primarily for use in the SLC CAMAC control system, has been designed, and has been in use for about 2 years. The design supports a party line approach, with up to 16 crates on a single twisted pair for data transfers, plus another pair for prompt L response. The bit rate is 5 megabits/s, and complete transaction times of about 10 ..mu..s are achieved for 16-bit data transfers over cables up to 1000 feet long. One of the primary objects of the design was simplicity - there are approximately 60 chips in the two-board unit.

Horelick, D.

1984-10-01

199

Inorganic positive uniaxial films fabricated by serial bideposition.  

PubMed

The physical vapor deposition process of serial bideposition is adapted to the fabrication of uniaxial optical coatings. During the coating process the vapor impinges at an angle of incidence of about 70 on to the substrate, and a stepwise axial rotation with 90 increments causes a columnar structure to grow normal to the substrate. Symmetry considerations that follow from the choice of 90 for the stepwise increment ensure that the film is achiral and has negligible in-plane linear birefringence. Optical characterization techniques confirm that films of tantalum oxide, titanium oxide and zirconium oxide are positive uniaxial with ne -no in the range 0.10 to 0.14. PMID:19483917

Hodgkinson, Ian; Wu, Qi Hong; De Silva, Lakshman; Arnold, Matthew

2004-08-01

200

Diffusion thermopower of a serial double quantum dot  

NASA Astrophysics Data System (ADS)

We have experimentally studied the diffusion thermopower of a serial double quantum dot, defined electrostatically in a GaAs/AlGaAs heterostructure. We present the thermopower stability diagram for a temperature difference ?T = (20 ± 10) mK across the device and find a maximum thermovoltage signal of several ?V in the vicinity of the triple points. Along a constant energy axis in this regime, the data show a characteristic pattern which is in agreement with Mott's relation and can be well understood within a model of sequential transport.

Thierschmann, H.; Henke, M.; Knorr, J.; Maier, L.; Heyn, C.; Hansen, W.; Buhmann, H.; Molenkamp, L. W.

2013-12-01

201

Serial rapists and their victims: reenactment and repetition.  

PubMed

The major finding in this study of 41 serial rapists is the large numbers of reported and unreported victims. For over 1200 attempted and completed rapes, there were 200 convictions. The hidden rapes or earliest nonreported victims of these men as boys and adolescents were identified from their families, their neighborhood, and their schools. Examining the possible link between childhood sexual abuse and criminal behavior in this sample of 41 serial rapists, 56.1% were judged to have at least one forced or exploitive abuse experience in boyhood, as compared to a study of 2,972 college males reporting 7.3% experiencing boyhood sexual abuse. Looking within the abused samples, 56.1% of the rapists reported forced sex, compared to the college sample's 30.4%. Also, the rapist sample revealed higher rates of family member as abuser (48.4%), compared to 22.2% for the college sample. Retrospective reconstruction of the sexual activities and assertive behaviors of these men as boys reveals that 51% of the boys reenact the abuse as a preadolescent with their earliest victims being known to them (48% as neighborhood girls), family (25% as sisters), or girlfriend (25%). The onset of rape fantasies in midadolescence (mean age 16.9) crystalizes the earlier sexually initiated behaviors into juvenile behaviors of spying, fetish burglaries, molestations, and rapes. Repetition of these juvenile behaviors set their criminal patters on strangers--their next group of victims. To reduce victimization, serial rapists need to be identified early and stopped. This means acknowledging and reporting boy sexual abuse. This includes being sensitive to the reenactment behaviors noted in the initiated activities of abused children, which in turn need to be differentiated from peer play. Closer attention needs to be paid to families with incest behavior to insure that younger children are protected. Adolescents showing early repetitive juvenile delinquent behaviors must be assessed for physical and sexual abuse, and intervention must be planned to deal with the victimization. In the investigation and apprehension of serial rapists, law enforcement might pay closer attention to fetish burglaries and the spying, secretive behaviors that serve as the prototype for rape behavior. PMID:3421601

Burgess, A W; Hazelwood, R R; Rokous, F E; Hartman, C R; Burgess, A G

1988-01-01

202

High-Resolution Protein Structure Determination by Serial Femtosecond Crystallography  

PubMed Central

Structure determination of proteins and other macromolecules has historically required the growth of high-quality crystals sufficiently large to diffract x-rays efficiently while withstanding radiation damage. We applied serial femtosecond crystallography (SFX) using an x-ray free-electron laser (XFEL) to obtain high-resolution structural information from microcrystals (less than 1 micrometer by 1 micrometer by 3 micrometers) of the well-characterized model protein lysozyme. The agreement with synchrotron data demonstrates the immediate relevance of SFX for analyzing the structure of the large group of difficult-to-crystallize molecules. PMID:22653729

Boutet, Sébastien; Lomb, Lukas; Williams, Garth J.; Barends, Thomas R. M.; Aquila, Andrew; Doak, R. Bruce; Weierstall, Uwe; DePonte, Daniel P.; Steinbrener, Jan; Shoeman, Robert L.; Messerschmidt, Marc; Barty, Anton; White, Thomas A.; Kassemeyer, Stephan; Kirian, Richard A.; Seibert, M. Marvin; Montanez, Paul A.; Kenney, Chris; Herbst, Ryan; Hart, Philip; Pines, Jack; Haller, Gunther; Gruner, Sol M.; Philipp, Hugh T.; Tate, Mark W.; Hromalik, Marianne; Koerner, Lucas J.; van Bakel, Niels; Morse, John; Ghonsalves, Wilfred; Arnlund, David; Bogan, Michael J.; Caleman, Carl; Fromme, Raimund; Hampton, Christina Y.; Hunter, Mark S.; Johansson, Linda C.; Katona, Gergely; Kupitz, Christopher; Liang, Mengning; Martin, Andrew V.; Nass, Karol; Redecke, Lars; Stellato, Francesco; Timneanu, Nicusor; Wang, Dingjie; Zatsepin, Nadia A.; Schafer, Donald; Defever, James; Neutze, Richard; Fromme, Petra; Spence, John C. H.; Chapman, Henry N.; Schlichting, Ilme

2013-01-01

203

Helium 3/Helium 4 dilution cryocooler for space  

NASA Technical Reports Server (NTRS)

Prototype dilution cryocoolers based on dilution refrigeration and adiabatic demagnetization refrigeration (ADR) cycles were designed, constructed, and tested. Although devices the devices did not operate as fully functional dilution cryocoolers, important information was gathered. The porous metal phase separator was demonstrated to operate in the -1-g configuration; this phase separation is the critical element in the He-3 circulation dilution cryocooler. Improvements in instrumentation needed for additional tests and development were identified.

Hendricks, John B.; Dingus, Michael L.

1991-01-01

204

Dilution jet mixing program, supplementary report  

NASA Technical Reports Server (NTRS)

The velocity and temperature distributions predicted by a 3-D numerical model and experimental measurements are compared. Empirical correlations for the jet velocity trajectory developed are presented. The measured velocity distributions for all test cases of phase through phase 3 are presented in the form of contour and oblique plots. quantification of the effects of the following on the jet mixing characteristics with a confined crossflow are: (1) orifice geometry momentum flux ratio and density ratio; (2) nonuniform mainstream temperature and velocity profiles upstream of dilution orifices; (3) cold versus hot jet injection; (4) cross-stream flow are a convergence as encountered in practical dilution zone geometries; (5) 2-D slot versus circular orifices; (6) discrete noncirculcer orifices; (7) single-sided versus opposed jets; (8) single row of jets.

Srinivasan, R.; White, C.

1986-01-01

205

Spectroscopic imaging of a dilute cell suspension  

E-print Network

A rigorous homogenization theory is derived to describe the effective admittivity of cell suspensions. A new formula is reported for dilute cases that gives the frequency-dependent effective admittivity with respect to the membrane polarization. Different microstructures are shown to be distinguishable via spectroscopic measurements of the overall admittivity using the spectral properties of the membrane polarization. The Debye relaxation times associated with the membrane polarization tensor are shown to be able to give the microscopic structure of the medium. A natural measure of the admittivity anisotropy is introduced and its dependence on the frequency of applied current is derived. A Maxwell-Wagner-Fricke formula is given for concentric circular cells, and the results can be extended to the random cases. A randomly deformed periodic medium is also considered and a new formula is derived for the overall admittivity of a dilute suspension of randomly deformed cells.

Habib Ammari; Josselin Garnier; Laure Giovangigli; Wenjia Jing; Jin-Keun Seo

2013-10-04

206

Employee stock options, EPS dilution, and stock repurchases  

Microsoft Academic Search

We investigate whether corporate executives’ stock repurchase decisions are affected by their incentives to manage diluted earning per share (EPS). We find that executives increase the level of their firms’ stock repurchases when: (1) the dilutive effect of outstanding employee stock options (ESOs) on diluted EPS increases, and (2) earnings are below the level required to achieve the desired rate

Daniel A. Bens; Venky Nagar; Douglas J. Skinner; M. H. Franco Wong

2003-01-01

207

Interaction of clays with dilute fluoride solutions  

Microsoft Academic Search

Interaction between dilute (mg L-1) NaF solutions and clay suspensions (0.08 % w\\/v) has been examined as a function of pH (range 3 to 8), clay type (Na+- or Ca2+-kaolinite, illite, montmorillonite) and NaF concentration. No F loss from solution was detected at pH > 6.5, while enhanced uptake was found on decreasing the pH, especially in the 4 to

J. Slavek; H. Farrah; W. F. Pickering

1984-01-01

208

The Physics and Technology of Dilute Nitrides  

Microsoft Academic Search

Dilute nitrides have emerged from conventional III–V semiconductors such as GaAs or InP by the insertion of nitrogen into the group V sub-lattice, which has a profound influence on the electronic properties of these materials and allows widely extended band structure engineering. This is expected to lead to novel devices, e.g. for optical data transmission, solar cells, biophotonics or gas

N Balkan

2004-01-01

209

Spectra of turbulence in dilute polymer solutions  

E-print Network

We investigate turbulence in dilute polymer solutions when polymers are strongly stretched by the flow. We establish power-law spectrum of velocity, which is not associated with a flux of a conserved quantity, in two cases. The first case is the elastic waves range of high Reynolds number turbulence of polymer solutions above the coil-stretch transition. The second case is the elastic turbulence, where chaotic flow is excited due to elastic instabilities at small Reynolds numbers.

A. Fouxon; V. Lebedev

2002-07-02

210

Zinc oxide-based diluted magnetic semiconductors  

Microsoft Academic Search

The current experimental situation on the occurrence or absence of ferromagnetism in diluted magnetic semiconductors based on wurtzite zinc oxide hosts is presented, focusing mainly on the many recent experiments which have been performed on bulk systems. Numerous reports have suggested that partial (typically less than 10at.%) substitution of Zn2+ in ZnO by magnetic transition metal (tM) ions, particularly Mn2+

Ram Seshadri

2005-01-01

211

Kinetic theory for dilute dipolar systems  

NASA Astrophysics Data System (ADS)

We propose a new kinetic theory to study dilute dipolar systems and apply it to the calculation of the angular velocity autocorrelation function for a system of Stockmayer molecules (Lennard-Jones particles with point dipoles) in the supercritical region. The predictions made from the theory are in excellent agreement with results obtained from molecular dynamics simulations over a broad range of densities above the critical temperature. The theory can be generalized to describe dielectric relaxation in supercritical water.

Bembenek, Scott D.; Szamel, Grzegorz

2002-11-01

212

The Anisotropic Transport Effects on Dilute Plasmas  

NASA Astrophysics Data System (ADS)

We examine the linear stability analysis of a hot, dilute, and differentially rotating plasma by considering anisotropic transport effects. In dilute plasmas, the ion Larmor radius is small compared with its collisional mean free path. In this case, the transport of heat and momentum along the magnetic field lines becomes important. This paper presents a novel linear instability that may be more powerful and greater than ideal magnetothermal instability and ideal magnetorotational instability in the dilute astrophysical plasmas. This type of plasma is believed to be found in the intracluster medium (ICM) of galaxy clusters and radiatively ineffective accretion flows around black holes. We derive the dispersion relation of this instability and obtain the instability condition. There is at least one unstable mode that is independent of the temperature gradient direction for a helical magnetic field geometry. This novel instability is driven by the gyroviscosity coupled with differential rotation. Therefore, we call it gyroviscous-modified magnetorotational instability (GvMRI). We examine how the instability depends on signs of the temperature gradient and the gyroviscosity and also on the magnitude of the thermal frequency and on the values of the pitch angle. We provide a detailed physical interpretation of the obtained results. The GvMRI is applicable not only to the accretion flows and ICM but also to the transition region between cool dense gas and the hot low-density plasma in stellar coronae, accretion disks, and the multiphase interstellar medium because it is independent of the temperature gradient direction.

Devlen, Ebru

2011-04-01

213

Molluscan engrailed expression, serial organization, and shell evolution.  

PubMed

Whether the serial features found in some molluscs are ancestral or derived is considered controversial. Here, in situ hybridization and antibody studies show iterated engrailed-gene expression in transverse rows of ectodermal cells bounding plate field development and spicule formation in the chiton, Lepidochitona cavema, as well as in cells surrounding the valves and in the early development of the shell hinge in the clam, Transennella tantilla. Ectodermal expression of engrailed is associated with skeletogenesis across a range of bilaterian phyla, suggesting a single evolutionary origin of invertebrate skeletons. The shared ancestry of bilaterian-invertebrate skeletons may help explain the sudden appearance of shelly fossils in the Cambrian. Our interpretation departs from the consideration of canonical metameres or segments as units of evolutionary analysis. In this interpretation, the shared ancestry of engrailed-gene function in the terminal/posterior addition of serially repeated elements during development explains the iterative expression of engrailed genes in a range of metazoan body plans. PMID:11256378

Jacobs, D K; Wray, C G; Wedeen, C J; Kostriken, R; DeSalle, R; Staton, J L; Gates, R D; Lindberg, D R

2000-01-01

214

Fast word reading in pure alexia: "fast, yet serial".  

PubMed

Pure alexia is a severe impairment of word reading in which individuals process letters serially with a pronounced length effect. Yet, there is considerable variation in the performance of alexic readers with generally very slow, but also occasionally fast responses, an observation addressed rarely in previous reports. It has been suggested that "fast" responses in pure alexia reflect residual parallel letter processing or that they may even be subserved by an independent reading system. Four experiments assessed fast and slow reading in a participant (DN) with pure alexia. Two behavioral experiments investigated frequency, neighborhood, and length effects in forced fast reading. Two further experiments measured eye movements when DN was forced to read quickly, or could respond faster because words were easier to process. Taken together, there was little support for the proposal that "qualitatively different" mechanisms or reading strategies underlie both types of responses in DN. Instead, fast responses are argued to be generated by the same serial-reading strategy. PMID:24592898

Bormann, Tobias; Wolfer, Sascha; Hachmann, Wibke; Neubauer, Claudia; Konieczny, Lars

2015-04-01

215

Gene expression analysis in serial liver fine needle aspirates.  

PubMed

No method with low morbidity presently exists for obtaining serial hepatic gene expression measurements in humans. While hepatic fine needle aspiration (FNA) has lower morbidity than core needle biopsy, applicability is limited due to blood contamination, which confounds quantification of gene expression changes. The aim of this study was to validate FNA for assessment of hepatic gene expression. Liver needle biopsies and FNA procedures were simultaneously performed on 17 patients with chronic hepatitis C virus infection with an additional FNA procedure 1 week later. Nine patients had mild/moderate fibrosis and eight advanced fibrosis. Gene expression profiling was performed using Affymetrix microarrays and TaqMan qPCR; pathway analysis was performed using Ingenuity. We developed a novel strategy that applies liver-enriched normalization genes to determine the percentage of liver in the FNA sample, which enables accurate gene expression measurements overcoming biases derived from blood contamination. We obtained almost identical gene expression results (? = 0.99, P < 0.0001) comparing needle biopsy and FNA samples for 21 preselected genes. Gene expression results were also validated in dogs. These data suggest that liver FNA is a reliable method for serial hepatic tissue sampling with potential utility for a variety of preclinical and clinical applications. PMID:24475909

Lejnine, S; Marton, M J; Wang, I-M; Howell, B J; Webber, A L; Maxwell, J W; Shire, N; Malkov, V; Lunceford, J; Zeremski, M; Sun, A; Ruddy, M; Talal, A H

2015-01-01

216

Implementation of Bluetooth serial port based profiles in embedded systems  

NASA Astrophysics Data System (ADS)

Bluetooth is a new short-range wireless communication technology developing rapidly in recent years. Bluetooth software architecture consists of stack and profiles. Serial Port Profile (SPP) is an underlying profile that emulates RS232 serial cable connections between two peer devices. Based on SPP, Dial-up Networking (DUN) Profile establishes PPP connection with remote dial-up server, Fax Profile realizes document facsimile function and LAN Access Profile (LAP) provides local area network access service. When it comes to their implementation in embedded systems, there are several challenges such as memory consumption, code efficiency, code reliability, and code portability onto different OS and hardware platforms to be attacked. In this paper, we propose integrated software architecture after discussing the great similarities shared among the three SPP based profiles. Then implementation of the architecture is given, in which OS-dependent and OS-independent parts are clearly separated. Profile interfaces with stack and OS are specified respectively so that the three profiles as a whole can be ported onto various software and hardware platforms easily. As a result, policy of transplanting our implementation onto different platforms is addressed at the end of the paper.

Liu, Guanglei; Qiu, Zhengding; Wang, Quanping; Gao, Qiang

2001-10-01

217

The NM29A040\\/NM29A080 serial flash memory architecture and its application  

Microsoft Academic Search

This paper describes the 4 and 8 Mbit serial flash memory devices developed by National Semiconductor. The serial flash architecture evolved from a need to store and retrieve large amounts of data in a simple, straightforward manner. The four-wire MicroWireTM interface used by this device makes the serial flash an ideal memory solution for systems with modest performance requirements. Examples

K. C. Adkins; R. Frizzell; J. D. Lyle

1996-01-01

218

Binding serial order to representations in working memory: a spatial\\/verbal dissociation  

Microsoft Academic Search

Verbal information is coded naturally as ordered representations in working memory (WM). However, this may not be true for\\u000a spatial information. Accordingly, we used memory span tasks to test the hypothesis that serial order is more readily bound\\u000a to verbal than to spatial representations. Removing serial-order requirements improved performance more for spatial locations\\u000a than for digits. Furthermore, serial order was

Leon Gmeindl; Megan Walsh; Susan M. Courtney

2011-01-01

219

A Comparison of the Properties of Diluted Bitumen Crudes with other Oils A Comparison of the Properties of Diluted Bitumen  

E-print Network

A Comparison of the Properties of Diluted Bitumen Crudes with other Oils A Comparison of the Properties of Diluted Bitumen Crudes with other Oils POLARIS Applied Sciences, Inc. (2013) Abstract Diluted bitumen (dilbit) crude oil represents a range of oils produced from bitumen extracted from oil sands

New Hampshire, University of

220

Inhibition of oil plume dilution in Langmuir ocean circulation  

NASA Astrophysics Data System (ADS)

Oil spills from deep-water blowouts rise through and interact with the ocean mixed layer and Langmuir turbulence, leading to considerable diversity of oil slick dilution patterns observed on the ocean surface. Certain conditions can drive oil droplet plumes to organize into distinct bands called windrows, inhibiting oil dilution. Observations of blurred or even diffused plumes are also common, but conditions under which these various dilution regimes emerge are not well understood. Here we use large eddy simulations to explain and quantify the dilution patterns and their dependence on relevant physical parameters. Two mechanisms, the downwelling and dilution due to Langmuir cells and the inhibition of dilution due to buoyancy of oil droplets, compete. This competition can be characterized by the ratio of Stokes drift to droplet rise velocity—the drift-to-buoyancy parameter, Db. We find that plume appearance and quantitative measures of relative dilution depend mainly on Db.

Yang, Di; Chamecki, Marcelo; Meneveau, Charles

2014-03-01

221

Dilution jet mixing program, phase 3  

NASA Technical Reports Server (NTRS)

The main objectives for the NASA Jet Mixing Phase 3 program were: extension of the data base on the mixing of single sided rows of jets in a confined cross flow to discrete slots, including streamlined, bluff, and angled injections; quantification of the effects of geometrical and flow parameters on penetration and mixing of multiple rows of jets into a confined flow; investigation of in-line, staggered, and dissimilar hole configurations; and development of empirical correlations for predicting temperature distributions for discrete slots and multiple rows of dilution holes.

Srinivasan, R.; Coleman, E.; Myers, G.; White, C.

1985-01-01

222

Serial blood phosphine levels in acute aluminium phosphide poisoning.  

PubMed

Serial blood phosphine (PH3) levels were done in patients with severe (Group I, n = 30), mild (Group 2, n = 10) and minimal or nil toxicity due to aluminium phosphide compound. Blood phosphine levels were significantly higher (p < 0.001) in patients of Group I than other two groups. Phosphine was not detectable in Group 3 patients. Therefore, blood phosphine levels were positively correlated to clinical grades of toxicity and to dose of active pesticide consumed. Higher the blood phosphine, higher was the mortality. Patients having blood phosphine levels equal to or less than 1.067 +/- 0.16 mg% survived, hence, it appeared to be limit of phosphine toxicity. PMID:9251315

Chugh, S N; Pal, R; Singh, V; Seth, S

1996-03-01

223

Serial analysis of gene expression (SAGE) in rat liver regeneration  

SciTech Connect

We have applied serial analysis of gene expression for studying the molecular mechanism of the rat liver regeneration in the model of 70% partial hepatectomy. We generated three SAGE libraries from a normal control liver (NL library: 52,343 tags), from a sham control operated liver (Sham library: 51,028 tags), and from a regenerating liver (PH library: 53,061 tags). By SAGE bioinformatics analysis we identified 40 induced genes and 20 repressed genes during the liver regeneration. We verified temporal expression of such genes by real time PCR during the regeneration process and we characterized 13 induced genes and 3 repressed genes. We found connective tissue growth factor transcript and protein induced very early at 4 h after PH operation before hepatocytes proliferation is triggered. Our study suggests CTGF as a growth factor signaling mediator that could be involved directly in the mechanism of liver regeneration induction.

Cimica, Velasco [Georg-August-University of Goettingen, Department of Gastroenterology and Endocrinology, Robert Koch Str. 40, 37075 Goettingen (Germany)]. E-mail: vcimica@aecom.yu.edu; Batusic, Danko [Georg-August-University of Goettingen, Department of Gastroenterology and Endocrinology, Robert Koch Str. 40, 37075 Goettingen (Germany); Haralanova-Ilieva, Borislava [Georg-August-University of Goettingen, Department of Gastroenterology and Endocrinology, Robert Koch Str. 40, 37075 Goettingen (Germany); Chen, Yonglong [Georg-August-University of Goettingen, Department of Developmental Biochemistry, Justus-von-Liebig-Weg 11, 37077 Goettingen (Germany); Hollemann, Thomas [Georg-August-University of Goettingen, Department of Developmental Biochemistry, Justus-von-Liebig-Weg 11, 37077 Goettingen (Germany); Pieler, Tomas [Georg-August-University of Goettingen, Department of Developmental Biochemistry, Justus-von-Liebig-Weg 11, 37077 Goettingen (Germany); Ramadori, Giuliano [Georg-August-University of Goettingen, Department of Gastroenterology and Endocrinology, Robert Koch Str. 40, 37075 Goettingen (Germany)

2007-08-31

224

Serially connected solid oxide fuel cells having monolithic cores  

DOEpatents

A solid oxide fuel cell for electrochemically combining fuel and oxidant for generating galvanic output, wherein the cell core has an array of cell segments electrically serially connected in the flow direction, each segment consisting of electrolyte walls and interconnect that are substantially devoid of any composite inert materials for support. Instead, the core is monolithic, where each electrolyte wall consists of thin layers of cathode and anode materials sandwiching a thin layer of electrolyte material therebetween. Means direct the fuel to the anode-exposed core passageways and means direct the oxidant to the cathode-exposed core passageways; and means also direct the galvanic output to an exterior circuit. Each layer of the electrolyte composite materials is of the order of 0.002-0.01 cm thick; and each layer of the cathode and anode materials is of the order of 0.002-0.05 cm thick. Between 2 and 50 cell segments may be connected in series.

Herceg, Joseph E. (Naperville, IL)

1987-01-01

225

Serial MSK modem for the Advanced Communications Satellite Program  

NASA Technical Reports Server (NTRS)

The design and test results of the 550-Mb/s, 110-Mb/s, and 27.5-Mb/s modems for the Advanced Communication Satellite Program are described. The TDMA/FDMA satellite environmental constraints have resulted in several unique features which include total acquisition times of 100 bit times and modem degradation of less than 1.5 dB at 10 to the -6th Pe. Key to the serial implementation of MSK is the resulting hardware simplicity and degradation insensitivity relative to conventionally implemented MSK and QPSK modems. The 110/27.5-Mb/s modems use an integrated circuit specifically developed for the program to perform the key carrier and clock-loop functions.

Stilwell, J. H.

1982-01-01

226

Optimal operation of turbo blowers serially connected using inlet vanes  

NASA Astrophysics Data System (ADS)

Optimal operation of the turbo blowers having an inlet vane has been studied to understand the blowers' operating performance. To analyze three-dimensional flow field in the turbo blowers serially connected, general analysis code, CFX, is introduced in the present work. SST turbulence model is employed to estimate the eddy viscosity. Throughout the numerical analysis, it is found that the flow rates of the turbo blowers can be controlled at the vane angle between 90 (full open condition) degrees and 60 degrees effectively, because pressure loss rapidly increases below 60 degree of a vane angle. Efficiency also has almost the same values from 90 degrees to 60 degrees of a vane angle. It is noted that the distorted inlet velocity generated in the small vane angle makes performance deterioration of the turbo blowers due to the local leading edge separation and the following non-uniform blade loading.

Jang, Choon-Man

2011-03-01

227

Application of Electronic Serial Usage Statistics in a National Laboratory  

SciTech Connect

Traditional measures of library performance – walk-in visitors, number of users attending presentations, classes, number of individual subscriptions processed, etc. – do not reflect the increased activity and use of library products and services. The Hanford Technical Library is physically removed from the main campus of Pacific Northwest National Laboratory, and thus necessitates having a robust online presence in order to effectively reach and provide services to library users. Online usage statistics have become vital in convincing Laboratory management to invest funding the library at continuing or increasing levels of demand for library services. E-serial usage statistics in particular give the Hanford Technical Library a myriad of information on user behavior, research trends, collection development, and act as important analytical tools which support resource allocation analysis, reporting, and managerial decision-making. However, there are many problems with publisher and vendor supplied usage statistics and possible solutions are proposed.

Noonan, Christine F.; McBurney, Melissa K.

2007-08-27

228

Star adaptation for two-algorithms used on serial computers  

NASA Technical Reports Server (NTRS)

Two representative algorithms used on a serial computer and presently executed on the Control Data Corporation 6000 computer were adapted to execute efficiently on the Control Data STAR-100 computer. Gaussian elimination for the solution of simultaneous linear equations and the Gauss-Legendre quadrature formula for the approximation of an integral are the two algorithms discussed. A description is given of how the programs were adapted for STAR and why these adaptations were necessary to obtain an efficient STAR program. Some points to consider when adapting an algorithm for STAR are discussed. Program listings of the 6000 version coded in 6000 FORTRAN, the adapted STAR version coded in 6000 FORTRAN, and the STAR version coded in STAR FORTRAN are presented in the appendices.

Howser, L. M.; Lambiotte, J. J., Jr.

1974-01-01

229

Bit-Serial Adder Based on Quantum Dots  

NASA Technical Reports Server (NTRS)

A proposed integrated circuit based on quantum-dot cellular automata (QCA) would function as a bit-serial adder. This circuit would serve as a prototype building block for demonstrating the feasibility of quantum-dots computing and for the further development of increasingly complex and increasingly capable quantum-dots computing circuits. QCA-based bit-serial adders would be especially useful in that they would enable the development of highly parallel and systolic processors for implementing fast Fourier, cosine, Hartley, and wavelet transforms. The proposed circuit would complement the QCA-based circuits described in "Implementing Permutation Matrices by Use of Quantum Dots" (NPO-20801), NASA Tech Briefs, Vol. 25, No. 10 (October 2001), page 42 and "Compact Interconnection Networks Based on Quantum Dots" (NPO-20855), which appears elsewhere in this issue. Those articles described the limitations of very-large-scale-integrated (VLSI) circuitry and the major potential advantage afforded by QCA. To recapitulate: In a VLSI circuit, signal paths that are required not to interact with each other must not cross in the same plane. In contrast, for reasons too complex to describe in the limited space available for this article, suitably designed and operated QCA-based signal paths that are required not to interact with each other can nevertheless be allowed to cross each other in the same plane without adverse effect. In principle, this characteristic could be exploited to design compact, coplanar, simple (relative to VLSI) QCA-based networks to implement complex, advanced interconnection schemes. To enable a meaningful description of the proposed bit-serial adder, it is necessary to further recapitulate the description of a quantum-dot cellular automation from the first-mentioned prior article: A quantum-dot cellular automaton contains four quantum dots positioned at the corners of a square cell. The cell contains two extra mobile electrons that can tunnel (in the quantum-mechanical sense) between neighboring dots within the cell. The Coulomb repulsion between the two electrons tends to make them occupy antipodal dots in the cell. For an isolated cell, there are two energetically equivalent arrangements (denoted polarization states) of the extra electrons. The cell polarization is used to encode binary information. Because the polarization of a nonisolated cell depends on Coulomb-repulsion interactions with neighboring cells, universal logic gates and binary wires could be constructed, in principle, by arraying QCA of suitable design in suitable patterns. Again, for reasons too complex to describe here, in order to ensure accuracy and timeliness of the output of a QCA array, it is necessary to resort to an adiabatic switching scheme in which the QCA array is divided into subarrays, each controlled by a different phase of a multiphase clock signal. In this scheme, each subarray is given time to perform its computation, then its state is frozen by raising its inter-dot potential barriers and its output is fed as the input to the successor subarray. The successor subarray is kept in an unpolarized state so it does not influence the calculation of preceding subarray. Such a clocking scheme is consistent with pipeline computation in the sense that each different subarray can perform a different part of an overall computation. In other words, QCA arrays are inherently suitable for pipeline and, moreover, systolic computations. This sequential or pipeline aspect of QCA would be utilized in the proposed bit-serial adders.

Fijany, Amir; Toomarian, Nikzad; Modarress, Katayoon; Spotnitz, Mathew

2003-01-01

230

Closed-Loop Analysis of Soft Decisions for Serial Links  

NASA Technical Reports Server (NTRS)

We describe the benefit of using closed-loop measurements for a radio receiver paired with a counterpart transmitter. We show that real-time analysis of the soft decision output of a receiver can provide rich and relevant insight far beyond the traditional hard-decision bit error rate (BER) test statistic. We describe a Soft Decision Analyzer (SDA) implementation for closed-loop measurements on single- or dual- (orthogonal) channel serial data communication links. The analyzer has been used to identify, quantify, and prioritize contributors to implementation loss in live-time during the development of software defined radios. This test technique gains importance as modern receivers are providing soft decision symbol synchronization as radio links are challenged to push more data and more protocol overhead through noisier channels, and software-defined radios (SDRs) use error-correction codes that approach Shannon's theoretical limit of performance.

Lansdowne, Chatwin A.; Steele, Glen F.; Zucha, Joan P.; Schlesinger, Adam M.

2013-01-01

231

Closed-Loop Analysis of Soft Decisions for Serial Links  

NASA Technical Reports Server (NTRS)

Modern receivers are providing soft decision symbol synchronization as radio links are challenged to push more data and more overhead through noisier channels, and software-defined radios use error-correction techniques that approach Shannon s theoretical limit of performance. The authors describe the benefit of closed-loop measurements for a receiver when paired with a counterpart transmitter and representative channel conditions. We also describe a real-time Soft Decision Analyzer (SDA) implementation for closed-loop measurements on single- or dual- (orthogonal) channel serial data communication links. The analyzer has been used to identify, quantify, and prioritize contributors to implementation loss in real-time during the development of software defined radios.

Lansdowne, Chatwin A.; Steele, Glen F.; Zucha, Joan P.; Schlensinger, Adam M.

2012-01-01

232

The evolution of photosynthesis in chromist algae through serial endosymbioses  

PubMed Central

Chromist algae include diverse photosynthetic organisms of great ecological and social importance. Despite vigorous research efforts, a clear understanding of how various chromists acquired photosynthetic organelles has been complicated by conflicting phylogenetic results, along with an undetermined number and pattern of endosymbioses, and the horizontal movement of genes that accompany them. We apply novel statistical approaches to assess impacts of endosymbiotic gene transfer on three principal chromist groups at the heart of long-standing controversies. Our results provide robust support for acquisitions of photosynthesis through serial endosymbioses, beginning with the adoption of a red alga by cryptophytes, then a cryptophyte by the ancestor of ochrophytes, and finally an ochrophyte by the ancestor of haptophytes. Resolution of how chromist algae are related through endosymbioses provides a framework for unravelling the further reticulate history of red algal-derived plastids, and for clarifying evolutionary processes that gave rise to eukaryotic photosynthetic diversity. PMID:25493338

Stiller, John W.; Schreiber, John; Yue, Jipei; Guo, Hui; Ding, Qin; Huang, Jinling

2014-01-01

233

Serially transplantable chemically induced rat islet cell tumor  

SciTech Connect

A serially transplantable, chemically induced pancreatic islet cell tumor was developed in Lewis rats. The original tumor was induced by the administration of streptozotocin and nicotinamide. It was subsequently maintained by ip or sc transplantation of tissue fragments into recipient animals. They were well encapsulated, without gross evidence of metastasis. Peroxidase immunocytochemical staining revealed a predominance of insulin-positive cells. Somatostatin-positive cells were also present and varied widely in numbers between different tumors. On electron microscopy, cells containing secretory granules, indistinguishable from nonneoplastic ..beta..-cells, were most abundant. Tumor extracts contained an average of 3260 ..mu..g insulin, 22.6 ..mu..g somatostatin, and 0.84 ..mu..g glucagon per g wet wt of tissue.

Chick, W.L. (Harvard Medical School, Boston, MA); Appel, M.C.; Weir, G.C.; Like, A.A.; Lauris, V.; Porter, J.G.; Chute, R.N.

1980-10-01

234

Serial assessment of local peripheral vascular function after eccentric exercise.  

PubMed

Muscle damage is a common response to unaccustomed eccentric exercise; however, the effects of skeletal muscle damage on local vascular function and blood flow are poorly understood. This study examined serial local vascular responses to flow-mediated (endothelial-dependent) and nitroglycerin-mediated (endothelial-independent) dilation in the brachial artery after strenuous eccentric exercise and serially assessed resting blood flow. Ten healthy males performed 50 maximal eccentric unilateral arm contractions to induce muscle damage to the biceps brachii. Changes in maximal isometric strength and vascular responses were assessed 1, 24, 48, and 96 h after exercise. Mean blood velocities and arterial diameters, measured with Doppler ultrasound, were used to calculate blood flow and shear stress (expressed as area under the curve). Eccentric exercise resulted in impaired maximal isometric strength for up to 96 h (p < 0.001). Reductions in flow-mediated dilation (before exercise, 9.4% ± 2.6%; 1 h after exercise, 5.1% ± 2.2%) and nitroglycerin responses (before exercise, 26.3% ± 6.5%; 1 h after exercise, 20.7% ± 4.7%) were observed in the 1 h after exercise and remained lower for 96 h (p < 0.05). The shear stress response was attenuated immediately after exercise and remained impaired for 48 h (p < 0.05). Resting blood pressure and muscle blood flow remained similar throughout the study. Results suggest that muscle damage from eccentric exercise leads to impaired local endothelial and vascular smooth muscle function. Lower shear stress after exercise might contribute to the observed reduction in flow-mediated dilation responses, but the mechanism responsible for the attenuated endothelial-independent vasodilation remains unclear. PMID:24195617

Stacy, Mitchel R; Bladon, Kallie J; Lawrence, Jennifer L; McGlinchy, Sarah A; Scheuermann, Barry W

2013-12-01

235

A procedure for serial simulation of electrochemical processes: cycling of electrodes and batteries  

E-print Network

Serial simulation is required to predict the behavior of an electrochemical system undergoing manyA procedure for serial simulation of electrochemical processes: cycling of electrodes and batteries B. Wu, R.E. White* Center for Electrochemical Engineering, Department of Chemical Engineering

236

Endoscopic laser surgery versus serial amniocenteses in the treatment of severe twin-twin transfusion syndrome  

Microsoft Academic Search

Objective: Severe twin-twin transfusion can be treated by either serial amniocenteses with removal of large volumes of amniotic fluid or by endoscopic laser coagulation of the communicating vessels. We investigated the benefit of laser surgery in comparison to serial amniocenteses in terms of pregnancy outcome. Study Design: The data used in this comparative study were collected from 116 patients with

Kurt Hecher; Hanno Plath; Thomas Bregenzer; Manfred Hansmann; Bernhard J. Hackelöer

1999-01-01

237

Controlling system design of high speed stepping motor based on serial communication  

Microsoft Academic Search

This paper introduces a controlling system of high speed stepping motor which combines singlechip and serial communication. This system contains the upper machine which is a PC, and the lower machine which is a singlechip. The upper machine communicates with the lower machine through serial port. An accelerating process is required because corresponding pulse frequency of regulated rotating speed is

Hui Tan; Mingliang Huang; Qi Zhang; Yi Liu

2011-01-01

238

Assembly of Large Three-Dimensional Volumes from Serial-Section Transmission Electron Microscopy  

Microsoft Academic Search

Serial-section transmission electron microscopy (TEM) is an important imaging modality for studying neuronal connectivity patterns. However, before serial-section TEM images can be used to reconstruct connectivities of neurons, several image registration problems must be addressed. The first pro blem arises due to the large sample size and limited field of view: each section must be assembled from many overlapping tiles,

Pavel Koshevoy; Tolga Tasdizen; Ross Whitaker; Bryan Jones; Robert Marc

239

Serial Data Fusion Using Space-filling Curves in Wireless Sensor Networks  

E-print Network

. This often makes parallel solution expensive, as sensors need to relay data to a central node for aggregation the communication cost as we will see later. This makes alternative approaches such as serial fusion attractiveSerial Data Fusion Using Space-filling Curves in Wireless Sensor Networks Swapnil Patil and Samir R

Das, Samir R.

240

Solving Linear Algebra Problems on Distributed-Memory Computers using Serial Codes  

E-print Network

-memory machines: we propose to make usual serial algorithms run above a run-time that carries out allSolving Linear Algebra Problems on Distributed-Memory Computers using Serial Codes Francisco D the solution to a problem on a distributed-memory multicomputer requires an effort much higher than

Batory, Don

241

Chapter 8: Conclusions A Solution to the Problem of Serial Order?  

E-print Network

246 Chapter 8: Conclusions A Solution to the Problem of Serial Order? How then do we store implementation of this theory, which makes further assumptions about short-term memory and the serial recall for this argument is summarised below. Summary of Thesis Chapter 1 introduced three possible solutions

Henson, Rik

242

Assembly of Large Three-Dimensional Volumes from Serial-Section Transmission Electron Microscopy  

E-print Network

be corrected. We present a carefully engineered solution to these problems making by modifying existing regis1 Assembly of Large Three-Dimensional Volumes from Serial-Section Transmission Electron Microscopy and Imaging Institute, University of Utah, USA 2Moran Eye Center, University of Utah, USA Abstract-- Serial

Utah, University of

243

Decision making under uncertainty for a class of production systems with serial and parallel operations  

Microsoft Academic Search

Purpose – The purpose of this paper is to present results concerning resource distribution problems for a class of production systems composed of production operations described by relations with uncertain parameters – for newly considered serial-parallel and parallel-serial structures. Design\\/methodology\\/approach – The resource distribution problems are formulated. For the typical mathematical model of a single production operation, the resource distribution

D. Orski; M. Hojda

2008-01-01

244

Serial Entrepreneurs and Venture Performance: Evidence from U.S. Venture-Capital-Financed  

E-print Network

Serial Entrepreneurs and Venture Performance: Evidence from U.S. Venture into account self-selection by founders into serial entrepreneurship and two roles of venture capitalists (VC). Analysis of the survival of U.S. venture-capital-financed semiconductor firms that entered the market

Sadoulet, Elisabeth

245

Evidence for a clade composed of molluscs with serially repeated structures: Monoplacophorans are related to chitons  

Microsoft Academic Search

Monoplacophorans are among the rarest members of the phylum Mollusca. Previously only known from fossils since the Cambrian, the first living monoplacophoran was discovered during the famous second Galathea deep-sea expedition. The anatomy of these molluscs shocked the zoological community for presenting serially repeated gills, nephridia, and eight sets of dorsoventral pedal retractor muscles. Seriality of organs in supposedly independent

Gonzalo Giribet; Akiko Okusu; Annie R. Lindgren; Stephanie W. Huff; Michael Schrödl; Michele K. Nishiguchi

2006-01-01

246

Interference between binary classification judgments and some repetition effects in a serial choice reaction time task  

Microsoft Academic Search

Hypotheses to explain the repetition effect in serial choice reaction tasks have suggested that on each consecutive trial S compares the percept of the current signal against his memory trace of the last. A direct test was made of this hypothesis, requiring a total of 34 college students in a serial self-paced choice reaction time task to classify each signal

P. M. Rabbitt; S. M. Vyas

1974-01-01

247

ON THE CORRELATION BETWEEN A SERIAL CHOICE REACTION TASK AND SUBSEQUENT ACHIEVEMENT AT TYPEWRITING  

Microsoft Academic Search

A serial choice reaction te3t and an intelligence test were administered to a group of new entrants to secretarial courses. At regular intervals typewriting test scores of this group were obtained. No correlation with intelligence was found. Performance on the serial choice reaction test and typewriting was found to be significantly correlated.

J. A. LEONARD; A. CARPENTER

1964-01-01

248

Optimal Allocation of Heat Exchanger Inventory in a Serial Type Diabatic Distillation Column  

E-print Network

Optimal Allocation of Heat Exchanger Inventory in a Serial Type Diabatic Distillation Column Edward the column . We have previously shown (Jimenez et al. 2003) that optimaloperation of serial heat exchangers total heat exchanger area in different trays and calculate the optimal allocation of a given heat

Salamon, Peter

249

Using Signal Detection Theory to Model Changes in Serial Learning of Radiological Image Interpretation  

ERIC Educational Resources Information Center

Signal detection theory (SDT) parameters can describe a learner's ability to discriminate (d[prime symbol]) normal from abnormal and the learner's criterion ([lambda]) to under or overcall abnormalities. To examine the serial changes in SDT parameters with serial exposure to radiological cases. 46 participants were recruited for this study: 20…

Boutis, Kathy; Pecaric, Martin; Seeto, Brian; Pusic, Martin

2010-01-01

250

Voxel Similarity Measures for 3D Serial MR Brain Image Registration  

Microsoft Academic Search

We have evaluated eight different similarity measures used for rigid body registration of serial magnetic resonance (MR) brain scans. To assess their accuracy we used 33 clinical three- dimensional (3-D) serial MR images, with deformable extradural tissue excluded by manual segmentation and simulated 3-D MR images with added intensity distortion. For each measure we deter- mined the consistency of registration

Mark Holden; Derek L. G. Hill; Erika R. E. Denton; Jo M. Jarosz; Tim C. S. Cox; Torsten Rohlfing; Joanne Goodey; David J. Hawkes

2000-01-01

251

More E cient Serialization and RMI for Java Michael Philippsen, Bernhard Haumacher, and Christian Nester  

E-print Network

RMI, standard serialization, and Fast Ethernet; a remote methodinvocation runsas fast as 80 by Fast Ethernet, JDK 1.1.6 regular JIT; the JDK 1.2beta was too buggy. For three di erent types-product, a benchmark collection for RMI is presented. On PCs connected through Ethernet, the better serialization

Hybinette, Maria

252

Design of the Modbus Communication through Serial Port in QNX Operation System  

Microsoft Academic Search

This paper presents a general design method on serial interface device driver, which is based on the analysis of Modbus protocol and QNX operation system (QNX OS) device driver architecture. Further, the paper specifies serial port communication in C program under QNX OS, and tests its communication with SIEMENS S7-200 PLC. The test result has proved that the method is

Sen Xu; Haipeng Pan; Jia Ren; Jie Su

2008-01-01

253

Joint Stiffness Identification of Six-revolute Industrial Serial Robots Claire Dumas  

E-print Network

Joint Stiffness Identification of Six-revolute Industrial Serial Robots Claire Dumas , St the stiffness of industrial robots from robot manufacturers. As a consequence, this paper introduces a robust and fast procedure that can be used to identify the joint stiffness values of any six-revolute serial robot

Paris-Sud XI, Université de

254

Analysis of Readex's Serial Set MARC Records: Improving the Data for the Library Catalog  

ERIC Educational Resources Information Center

Colorado State University Libraries (CSUL) purchased the digitized "United States Congressional Serial Set," 1817-1994 and "American State Papers" (1789-1838) from the Readex Division of NewsBank, Inc. and, once funds and records were available, the accompanying MARC records. The breadth of information found in the "Serial Set" is described, along…

Draper, Daniel; Lederer, Naomi

2013-01-01

255

The Effect of Rate of Presentation on Digit Serial Recall in Reading Retarded Children.  

ERIC Educational Resources Information Center

This study examined the effect of presentation rate on accuracy of digit serial recall and on serial position curves of digit strings of different lengths with 18 boys classified as reading retarded and a comparison group of children (ages for both groups averaged 11 years) who read at grade level. The results indicated that normal children…

Gan, Jennifer; Tymchuk, Alexander J.

256

3Gb/s CMOS Adaptive Equalizer for Backplane Serial Links  

E-print Network

3Gb/s CMOS Adaptive Equalizer for Backplane Serial Links Jae-Wook Lee and Woo-Young Choi Department equalizer is proposed for the appli- cation of backplane serial link. The equalizer is made of digitally controlled feed-forward equalizer (DCFFE), bottom detector, limiting amplifier and control block. The control

Choi, Woo-Young

257

Edinburgh Research Explorer Quantitative Serial MRI of the Treated Fibroid Uterus  

E-print Network

Edinburgh Research Explorer Quantitative Serial MRI of the Treated Fibroid Uterus Citation Serial MRI of the Treated Fibroid Uterus' PLoS One, vol 9, no. 3, e89809., 10.1371/journal.pone.0089809 of the Treated Fibroid Uterus Kirsty I. Munro1. , Michael J. Thrippleton1,2. , Alistair R. W. Williams1

Maizels, Rick

258

A century of indicator dilution technique.  

PubMed

This review imparts the history and the present status of the indicator dilution technique with quantitative bolus injection. The first report on flow measurement with this technique appeared 100 years ago. In 1928, the use of intravascular dyes made possible a widespread application in animals and human during the next decades. Multiple indicators, radioactive tracers, inlet-outlet detection and residue detection were introduced in the 1950s and 1960s, and refined along with the development of indicator kinetics. From the 1970s, a wide clinical use in the study of heart, brain, lungs, liver and kidneys developed, and powerful computers in the 1980s and 1990s accorded the technique a new dimension. Today, the indicator dilution technique, on one hand, is applied in the same way as 100 years ago, on the other hand it forms the basis of quantitative SPECT, positron emission tomography, and dynamic MR scans. The technique still undergoes refinement and elaboration as a lasting concept with a high potential for further development. PMID:23869947

Henriksen, Jens H; Jensen, Gorm B; Larsson, Henrik B W

2014-01-01

259

IEEE 1394/firewire a low cost, high speed, digital serial bus  

SciTech Connect

Does the world need yet another 1/0 bus standard? If you need fast and cheap serial video communication, then the answer is yes. As technology advances, so too must data transport mechanisms advance. You can`t expect RS-232 to support real-time digital video, and if you can`t afford expensive professional serial video interfaces, (such as Sony`s Serial Digital Interface), Firewire may be a good solution. IEEE 1394, or commonly known as Firewire, is a general purpose serial bus that meets many of the 1/0 needs of today`s video and multimedia developers. For those of you who only read the first paragraph, here`s Firewire in a nutshell: It provides a guaranteed transfer rate of 10OMbps or 20OMbps of digital data (such as video direct from camera to computer), over an inexpensive, non-proprietary serial bus. Here is a list of its features.

Gaunt, R.

1997-05-01

260

Characterization of the Dilute Ising Antiferromagnet  

SciTech Connect

A spin glass is a magnetic ground state in which ferromagnetic and antiferromagnetic exchange interactions compete, thereby creating frustration and a multidegenerate state with no long range order. An Ising system is a system where the spins are constrained to lie parallel or antiparallel to a primary axis. There has been much theoretical interest in the past ten years in the effects of applying a magnetic field transverse to the primary axis in an Ising spin glass at low temperatures and thus study phase transitions at the T=0 limit. The focus of this study is to search for and characterize a new Ising spin glass system. This is accomplished by site diluting yttrium for terbium in the crystalline material TbNi{sub 2}Ge{sub 2}. The first part of this work gives a brief overview of the physics of rare earth magnetism and an overview of experimental characteristics of spin glasses. This is followed by the methodology used to manufacture the large single crystals used in this study, as well as the measurement techniques used. Next, a summary of the results of magnetic measurements on across the dilution series from pure terbium to pure yttrium is presented. This is followed by detailed measurements on particular dilutions which demonstrate spin glass behavior. Pure TbNi{sub 2}Ge{sub 2} is an Ising antiferromagnet with a several distinct metamagnetic states below 17 K. As the terbium is alloyed with yttrium, these magnetic states are weakened in a consistent manner, as is seen in measurements of the transition temperatures and analysis of Curie-Weiss behavior at high temperature. At low concentrations of terbium, below 35%, long range order is no longer present and a spin-glass-like state emerges. This state is studied through various measurements, dc and ac susceptibility, resistivity, and specific heat. This magnetic behavior was then compared to that of other well characterized spin glasses. It is concluded that there is a region of concentration s for which a spin glass state is formed with the best spin glasses existing between the concentration of 25% and 30%.

Wiener, T.

2000-09-12

261

Quantitative Serial MRI of the Treated Fibroid Uterus  

PubMed Central

Objective There are no long-term medical treatments for uterine fibroids, and non-invasive biomarkers are needed to evaluate novel therapeutic interventions. The aim of this study was to determine whether serial dynamic contrast-enhanced MRI (DCE-MRI) and magnetization transfer MRI (MT-MRI) are able to detect changes that accompany volume reduction in patients administered GnRH analogue drugs, a treatment which is known to reduce fibroid volume and perfusion. Our secondary aim was to determine whether rapid suppression of ovarian activity by combining GnRH agonist and antagonist therapies results in faster volume reduction. Methods Forty women were assessed for eligibility at gynaecology clinics in the region, of whom thirty premenopausal women scheduled for hysterectomy due to symptomatic fibroids were randomized to three groups, receiving (1) GnRH agonist (Goserelin), (2) GnRH agonist+GnRH antagonist (Goserelin and Cetrorelix) or (3) no treatment. Patients were monitored by serial structural, DCE-MRI and MT-MRI, as well as by ultrasound and serum oestradiol concentration measurements from enrolment to hysterectomy (approximately 3 months). Results A volumetric treatment effect assessed by structural MRI occurred by day 14 of treatment (9% median reduction versus 9% increase in untreated women; P?=?0.022) and persisted throughout. Reduced fibroid perfusion and permeability assessed by DCE-MRI occurred later and was demonstrable by 2–3 months (43% median reduction versus 20% increase respectively; P?=?0.0093). There was no apparent treatment effect by MT-MRI. Effective suppression of oestradiol was associated with early volume reduction at days 14 (P?=?0.041) and 28 (P?=?0.0061). Conclusion DCE-MRI is sensitive to the vascular changes thought to accompany successful GnRH analogue treatment of uterine fibroids and should be considered for use in future mechanism/efficacy studies of proposed fibroid drug therapies. GnRH antagonist administration does not appear to accelerate volume reduction, though our data do support the role of oestradiol suppression in GnRH analogue treatment of fibroids. Trial Registration ClinicalTrials.gov NCT00746031 PMID:24608161

Williams, Alistair R. W.; McKillop, Graham; Walker, Jane; Horne, Andrew W.; Newby, David E.; Anderson, Richard A.; Semple, Scott I.; Marshall, Ian; Lewis, Steff C.; Millar, Robert P.; Bastin, Mark E.; Critchley, Hilary O. D.

2014-01-01

262

Dilution Jet Mixing Program, phase 1  

NASA Technical Reports Server (NTRS)

The effect of jet to mainstream density ratio, flow area convergence as encounted in transition sections, and nonuniform mainstream profile upstream of dilution orifices on the mixing of a row of jets with a confined cross flow was quantified. It is found that: (1) jet spreading rate in transverse direction is increased with increasing J, H/D and with decreasing S/D; (2) the density ratio has only a second order effect on the jet mixing characteristics for a constant momentum ratio; (3) the temperature distributions in the jet mixing region are strongly influenced by the undisturbed mainstream profile; (4) flow area convergence enhances mixing in radial and transverse directions. An asymmetric convergent duct with flat wall injection has the same jet mixing characteristics as a symmetric convergent duct. An asymmetric convergent duct with slant wall injection has a faster jet spreading rate in the transverse direction.

Srinivasan, R.; Berenfeld, A.; Mongia, H. C.

1982-01-01

263

Are Room Temperature Ionic Liquids Dilute Electrolytes?  

E-print Network

An important question in understanding the structure of ionic liquids is whether ions are truly "free" and mobile which would correspond to a concentrated ionic melt, or are rather "bound" in ion pairs, that is a liquid of ion pairs with a small concentration of free ions. Recent surface force balance experiments from different groups have given conflicting answers to this question. We propose a simple model for the thermodynamics and kinetics of ion pairing in ionic liquids. Our model takes into account screened ion-ion, dipole-dipole and dipole-ion interactions in the mean field limit. The results of this model suggest that almost two thirds of the ions are free at any instant, and ion pairs have a short lifetime comparable to the characteristic timescale for diffusion. These results suggest that there is no particular thermodynamic or kinetic preference for ions residing in pairs. We therefore conclude that ionic liquids are concentrated, rather than dilute, electrolytes.

Lee, Alpha A; Perkin, Susan; Goriely, Alain

2014-01-01

264

Hydration structure in dilute hydrofluoric acid.  

PubMed

We have performed the multistate empirical valence bond (MS-EVB) molecular dynamics simulations of a dilute hydrofluoric acid solution at ambient temperature to study the hydration structure associated with its weak acidity. The developed MS-EVB model showed reasonable agreement with experimental and previous ab initio molecular dynamics and reference interaction site model self-consistent field simulations for the free energy and structural properties. The local tetrahedral and translational order parameters around the fluorine atom significantly increase in the transition and product states of the HF dissociation reaction. This indicates that the angular and translational rearrangements of the hydrogen-bond topology are necessary especially around the fluorine atom. At the transition state of the proton transfer, the tetrahedral order parameters are very large, whereas the translational order parameters are not. This suggests that for the proton transfer to occur the large angular rearrangements of the hydrogen-bond topology are more necessary than the translational ones. PMID:21210669

Joutsuka, Tatsuya; Ando, Koji

2011-02-10

265

Serial Subtraction Errors Revealed Sue E. Kase (skase@ist.psu.edu), Frank E. Ritter (frank.ritter@psu.edu)  

E-print Network

Serial Subtraction Errors Revealed Sue E. Kase (skase@ist.psu.edu), Frank E. Ritter (frank the performance of a mental multi-digit serial subtraction task reveals the cognitive processes most prone to failure. Example serial subtraction problems from the experimental problem set are utilized

Ritter, Frank

266

Placing order in space: the SNARC effect in serial learning.  

PubMed

The SNARC effect, consisting of a systematic association between numbers and lateralized response, reflects the mental representation of magnitude along a left-to-right mental number line (Dehaene et al. in J Exp Psychol 122:371-396, 1993). Critically, this effect has been reported in the classification of overlearned non-numerical sequences such as letters, days and months (Gevers et al. in Cognition 87:B87-B95, 2003 and Cortex 40:171-172, 2004) suggesting that ordinal, rather than magnitude information, is critical for spatial coding. This study tests the hypothesis of an oriented spatial representation as the privileged way of mentally organizing serial information, by looking for stimulus-response compatibility effects in the processing of a newly acquired arbitrary sequence. Here we report an association between ordinal position of the items and spatial response preference for both order-relevant and order-irrelevant tasks. These results suggest that any ordered information, even when order is not intrinsically relevant to it, is spontaneously mapped in the representational space. This spatial representation is likely to acquire a left-to-right orientation, at least in western cultures. PMID:19888566

Previtali, Paola; de Hevia, Maria Dolores; Girelli, Luisa

2010-03-01

267

Serial reproduction of traumatic events: does the chain unravel?  

PubMed

Our goal in this paper is to show that a careful analysis of recall accuracy within a serial reproduction chain can add to a detailed qualitative analysis of the reproductions within the chain. The texts we chose are based on newspaper reports concerning current events, which are far from being mundane: reports of tragic events, even traumatic events. The participants were 216 students who were randomly assigned to 54 four-person reproduction chains, 18 for each of three 160-word texts. The reproduction chain is highly dependent on the recall accuracy of the first generation (i.e., the first participant in the reproduction chain). Thus, we argue (and show) that there should be a qualitative difference between chains starting off with a high level of recall accuracy from those starting off with a low level of recall accuracy. Our data-analytic approach is based on trend analysis, which we argue is an apt quantitative, holistic, dynamic, process-oriented type of analysis that is required in such research. PMID:25168856

Nahari, Galit; Sheinfeld, Vallery; Glicksohn, Joseph; Nachson, Israel

2015-02-01

268

Serial Monitoring of Endogenous Neuroblast Migration by Cellular MRI  

PubMed Central

Endogenous neural progenitor cell migration in vivo can be monitored using MRI-based cell tracking. The current protocol is that micron sized iron oxide particles (MPIOs) are injected into the lateral ventricle proximal to the neural stem cell niche in the brain. MPIOs are endocytosed and incorporated into the neural progenitor cell population, making them visible by gradient echo MRI. Here this new method is extended to serially quantify cell migration. Initially, in vivo cell labeling methodologies were optimized, as high susceptibility effects from the MPIOs generate substantial signal loss around the injection site, masking early migratory events. Then, using improved labeling conditions, a longitudinal study was conducted over two weeks to quantify the migration of labeled progenitor cells towards the olfactory bulb (OB). By 3 days following injection, we calculated 0.26 % of the volume of the OB containing labeled cells. By 8 days, this volume nearly doubled to 0.49% and plateaued. These MRI results are in accordance with our data on iron quantification from the OB and with those from purely immunohistochemical studies. PMID:21571076

Granot, Dorit; Scheinost, Dustin; Markakis, Eleni A.; Papademetris, Xenios; Shapiro, Erik M.

2011-01-01

269

Serial haemostatic monitoring of dogs with multicentric lymphoma.  

PubMed

Lymphoma is the most common haematopoietic malignancy in dogs and it has been associated with hypercoagulability and subsequent thromboembolism. The objectives of this study were to serially characterize the haemostatic status of dogs with multicentric lymphoma. Thromboelastography, thrombin-antithrombin complex concentration and routine haematology and coagulation panels were measured. Twenty-seven dogs were included in the study and 15 completed the study in remission. At presentation, 81% (22/27) of dogs with multicentric lymphoma had altered haemostatic profiles consistent with hypercoagulability. Laboratory evidence of hypercoagulability did not resolve during treatment or for up to 1 month following attainment of clinical remission. Accelerated rate of clot formation at the time of chemotherapeutic protocol completion was associated with decreased survival time. We concluded that dogs with multicentric lymphoma were frequently hypercoagulable from presentation through 4?weeks after the completion of chemotherapy. Increased angle and shortened K in dogs that have successfully completed their chemotherapeutic protocol may be associated with shorter survival times. PMID:23710569

Kol, A; Marks, S L; Skorupski, K A; Kass, P H; Guerrero, T; Gosselin, R C; Borjesson, D L

2013-05-25

270

Serially connected solid oxide fuel cells having monolithic cores  

DOEpatents

Disclosed is a solid oxide fuel cell for electrochemically combining fuel and oxidant for generating galvanic output. The cell core has an array of cell segments electrically serially connected in the flow direction, each segment consisting of electrolyte walls and interconnect that are substantially devoid of any composite inert materials for support. Instead, the core is monolithic, where each electrolyte wall consists of thin layers of cathode and anode materials sandwiching a thin layer of electrolyte material therebetween. Means direct the fuel to the anode-exposed core passageways and means direct the oxidant to the cathode-exposed core passageways; and means also direct the galvanic output to an exterior circuit. Each layer of the electrolyte composite materials is of the order of 0.002 to 0.01 cm thick; and each layer of the cathode and anode materials is of the order of 0.002 to 0.05 cm thick. Between 2 and 50 cell segments may be connected in series.

Herceg, J.E.

1985-05-20

271

High speed serial link for UA1 microprocessor network  

E-print Network

The UA1 data acquisition system consists of a set of distributed microprocessor units. An interprocessor link, independent of the CAMAC data readout, has been developed in order to have continuous remote control and run-time data handling, e.g. transmission of calibration programs/parameters, equipment test/status and histogram accumulation. The data transmission system is designed to be used in a loop configuration equipped with transceivers for twisted pair cables (RS-422). As an economical system, it is running as an ancillary serial loop-link between microprocessors, like Data Acquisition Crate Controllers and systems with distributed intelligence. The software driver consists of a loop-controller package, which may run in a BAMBI Computer Language environment and a fully interrupt controlled program for all other secondary stations. A special single-character mode provides a handy link for remote debugging in a pseudo-full-duplex mode. The format is based on the HDLC protocol without sequence numbering. ...

Cittolin, S; Zurfluh, E

1981-01-01

272

Serial analysis of gene expression in a microglial cell line.  

PubMed

We used the serial analysis of gene expression (SAGE) method to systematically analyze transcripts present in a microglial cell line. Over 10,000 SAGE tags were sequenced, and shown to represent 6,013 unique transcripts. Among the diverse transcripts that had not been previously detected in microglia were those for cytokines such as endothelial monocyte-activating polypeptide I (EMAP I), and for cell surface antigens, including adhesion molecules such as CD9, CD53, CD107a, CD147, CD162 and mast cell high affinity IgE receptor. In addition, we detected transcripts that were characteristic of hematopoietic cells or mesodermal structures, such as E3 protein, A1, EN-7, B94, and ufo. Furthermore, the profile contained a transcript, Hn1, that is important in hematopoietic cells and neurological development (Tang et al. Mamm Genome 8:695-696, 1997), suggesting the probable neural differentiation of microglia from the hematopoietic system in development. Messenger RNA expression of these genes was confirmed by RT-PCR in primary cultures of microglia. Significantly, this is the first systematic profiling of the genes expressed in a microglial cell line. The identification and further characterization of the genes described here should provide potential new targets for the study of microglial biology. PMID:10559785

Inoue, H; Sawada, M; Ryo, A; Tanahashi, H; Wakatsuki, T; Hada, A; Kondoh, N; Nakagaki, K; Takahashi, K; Suzumura, A; Yamamoto, M; Tabira, T

1999-12-01

273

Serial exercise gated radionuclide ventriculograms (RVG) in monitoring doxorubicin cardiotoxicity  

SciTech Connect

The resting RVG (Radionuclide Ventriculograms) are demonstrated to be an effective monitor of the cardiotoxicity of doxorubicin. The exercise RVG has not been as well studied to see if it yields additional information or detects toxicity effects earlier. Sixteen patients receiving doxorubicin for chemotherapy had 2-6 serial exercise studies with intervals between studies of 1 month to 15 months. The patients exercised varying amounts with cardiac work indicated by their double products (HR x Sys. BP). Although all patients started with a normal resting LVEF (>50%), 5 of the 16 did not have a normal response (greater than or equal to5% increase in LVEF) with initial exercise study. Of the 11 patients with an initially normal response to exercise, on at least one subsequent study, 3 had an abnormal response to exercise. On a later follow up study 1 of these 3 patients again had a normal response to exercise. Six of these 11 patients had had RVG evidence of cardiotoxicity. Four of these 6 patients had continually normal exercise responses, while 2 of these 5 patients had had an abnormal exercise response. An initial exercise RVG may be reasonable to detect unsuspected CAD in cancer victims. These patients are reported to be more sensitive to the toxic effects of doxorubicin. Follow up exercise RVGs do not contribute useful information, do not predict cardiotoxicity, and may be misleading.

Goldstein, H.A.; Lahoda, J.; Fox, L.

1985-05-01

274

A rare case of serial killing by poisoning.  

PubMed

A case of serial killing by poisoning by a 59-year-old practical nurse is discussed. Following a report by an emergency-room doctor of an attempted murder, police performed an investigation into all deaths of patients in the nurse's care. Earlier, a medico-legal cause-of-death investigation had been performed on two of these cadavers, but in the other three cases the death certificate had been issued after a medical investigation only. In two of these latter cases, the body had been cremated, but fixed histological samples taken at medical autopsy were available, while in one case the person had died recently and the body was thereafter exhumed and autopsied. All of the suspected victims were older people who required nursing, and the nurse's course of action was consistent in all cases. In the absence of ordinary post-mortem toxicology samples in the medical cases, extraordinary evidence--paraffin-embedded liver tissue samples originally taken for histology at autopsy--was successfully recovered in two cases and analyzed for drugs. In all five cases, drugs not prescribed to the patient were detected, including digoxin, dixyrazine, citalopram, venlafaxine, and benzodiazepines (diazepam, chlordiazepoxide, temazepam, and oxazepam). The nurse was eventually found guilty of five murders by poisoning, five attempted murders, and three aggravated assaults. The nurse was sentenced to life imprisonment. PMID:23613335

Vuori, Erkki; Pelander, Anna; Rasanen, Ilpo; Juote, Mikko; Ojanperä, Ilkka

2013-01-01

275

Three-dimensional reconstruction from serial sections using triakis  

NASA Astrophysics Data System (ADS)

Various methods for serial-section reconstruction from images of tissue sections have been investigated using the Apple Macintosh-based program Triakis. Triakis is a three-dimensional mathematical morphology software package that processes 3-D binary data in the FCC (face centered cubic) tessellation by means of LUT (look-up table) manipulations. Tissue sections have been obtained from a breast tumor and traced using PC3-D [Jandel Scientific, Corte Madera, Calif.] were transferred via a software interface to Triakis. Triakis uses the Apple Macintosh polygon filling routine to fill each tracing with binary ones. Next, ranking transforms in the binary FCC tessellation were used in order to demonstrate their capability of smoothly interpolating from one section to the other. The optimum transform is based on the placement of the binarized tissue sections in hexagonal planes and uses three cycles of a rank three transform for the initial interpolation. Irregularities are then removed from the resulting solid by seven cycles of a compound transform. Thereafter, the filled polygons were eroded using Triakis and, from the annular histogram, the spatial interrelationships of malignant cells within the tumor determined.

Preston, Kendall, Jr.; Siderits, Richard

1992-06-01

276

LabVIEW Serial Driver Software for an Electronic Load  

NASA Technical Reports Server (NTRS)

A LabVIEW-language computer program enables monitoring and control of a Transistor Devices, Inc., Dynaload WCL232 (or equivalent) electronic load via an RS-232 serial communication link between the electronic load and a remote personal computer. (The electronic load can operate at constant voltage, current, power consumption, or resistance.) The program generates a graphical user interface (GUI) at the computer that looks and acts like the front panel of the electronic load. Once the electronic load has been placed in remote-control mode, this program first queries the electronic load for the present values of all its operational and limit settings, and then drops into a cycle in which it reports the instantaneous voltage, current, and power values in displays that resemble those on the electronic load while monitoring the GUI images of pushbuttons for control actions by the user. By means of the pushbutton images and associated prompts, the user can perform such operations as changing limit values, the operating mode, or the set point. The benefit of this software is that it relieves the user of the need to learn one method for operating the electronic load locally and another method for operating it remotely via a personal computer.

Scullin, Vincent; Garcia, Christopher

2003-01-01

277

Distinguishing between parallel and serial accounts of multiple object tracking  

PubMed Central

Humans can track multiple moving objects. Is this accomplished by attending to all the objects at the same time or do we attend to each object in turn? We addressed this question using a novel application of the classic simultaneous-sequential paradigm. We considered a display in which objects moved for only part of the time. In one condition, the objects moved sequentially, whereas in the other condition they all moved and paused simultaneously. A parallel model would predict that the targets are tracked independently, so the tracking of one target should not be influenced by the movement of another target. Thus, one would expect equal performance in the two conditions. Conversely, a simple serial account of object tracking would predict that an observer's accuracy should be greater in the sequential condition because in that condition, at any one time, fewer targets are moving and thus need to be attended. In fact, in our experiments we observed performance in the simultaneous condition to be equal to or greater than the performance in the sequential condition. This occurred regardless of the number of targets or how the targets were positioned in the visual field. These results are more directly in line with a parallel account of multiple object tracking. PMID:20884586

Howe, Piers D. L.; Cohen, Michael A.; Pinto, Yair; Horowitz, Todd S.

2010-01-01

278

Serial myocardial perfusion imaging: defining a significant change and targeting management decisions.  

PubMed

Myocardial perfusion imaging (MPI) with gated single-photon emission tomography provides important information on the extent and severity of myocardial perfusion abnormalities, including myocardial ischemia. The availability of software for automated quantitative assessment of myocardial perfusion in an objective and more reproducible manner than visual assessment has allowed MPI to be particularly effective in serial evaluation. Serial testing using MPI is widely used in guiding patient care despite the lack of well-defined appropriateness use criteria. This should not be surprising because ischemic heart disease is a life-long malady subject to dynamic changes throughout its natural course and particularly following man-made interventions that may improve or worsen the disease process, such as medical therapy and coronary revascularization. Serial MPI has filled an important clinical gap by providing crucial information for managing patients with changes in clinical presentations or in anticipation of such changes in patients with stable symptoms. In the research arena, serial MPI has been widely applied in randomized controlled trials to study the impact of various medical and interventional therapies on myocardial perfusion, as well as the relative merits of new imaging procedures (hardware and/or software), radiotracers, and stressor agents. Serial testing, however, unlike initial or 1-time testing, has more stringent requirements and is subject to variability because of technical, procedural, interpretational, and biological factors. The intrinsic variability of MPI becomes important in interpreting serial tests in order to define a true change in a given patient and to guide clinical decision making. The purpose of this first comprehensive review on this subject is to illustrate where serial MPI may be useful clinically and in research studies, and to highlight strategies for addressing the various issues that are unique to serial testing in order to derive more valid and robust data from the serial scans. PMID:24433711

Iskandrian, Ami E; Hage, Fadi G; Shaw, Leslee J; Mahmarian, John J; Berman, Daniel S

2014-01-01

279

Dominance of the odometer over serial landmark learning in honeybee navigation  

NASA Astrophysics Data System (ADS)

Honeybees use their visual flow field to measure flight distance. It has been suggested that the experience of serial landmarks encountered on the flight toward a feeding place contributes to distance estimation. Here, we address this question by tracing the flight paths of individual bees with a harmonic radar system. Bees were trained along an array of three landmarks (tents), and the distance between these landmarks was either increased or decreased under two test conditions. We find that absolute distance estimation dominates the search for the feeding place, but serial position effects are also found. In the latter case, bees search only or additionally at locations determined by serial experience of the landmarks.

Menzel, Randolf; Fuchs, Jacqueline; Nadler, Leonard; Weiss, Benjamin; Kumbischinski, Nicole; Adebiyi, Daniel; Hartfil, Sergej; Greggers, Uwe

2010-08-01

280

A quad multi-speed serializer\\/deserializer with analog adaptive equalization  

Microsoft Academic Search

A quad multi-speed (1.25\\/1.5625\\/2.5\\/3.125Gb\\/s) serializer\\/deserializer implemented in 0.25?m CMOS technology is described. It uses a 4× interleaved sample-and-hold receiver architecture. An analog adaptive receiver equalizer and a linear phase detector are used for clock and data recovery. At 3.125Gb\\/s, the serializer RMS jitter is 2.4ps. The serializer\\/deserializer runs error free for 231-1 PRBS data pattern over various length, up to

Hui Wang; Xicheng Jiang; Derek Tam; Felix Cheung; Darwin Cheung; Wynstan Tong; Michael Le; M. Wakayama; Jurgen Van Engelen; V. Parthasarathy; H. Baumer; Aaron Buchwald

2004-01-01

281

Development of gallium arsenide high-speed, low-power serial parallel interface modules: Executive summary  

NASA Technical Reports Server (NTRS)

Final report to NASA LeRC on the development of gallium arsenide (GaAS) high-speed, low power serial/parallel interface modules. The report discusses the development and test of a family of 16, 32 and 64 bit parallel to serial and serial to parallel integrated circuits using a self aligned gate MESFET technology developed at the Honeywell Sensors and Signal Processing Laboratory. Lab testing demonstrated 1.3 GHz clock rates at a power of 300 mW. This work was accomplished under contract number NAS3-24676.

1988-01-01

282

Test of dilute gas approximation in quantum mechanical model  

Microsoft Academic Search

The validity of dilute gas approximation is explored by making use of the large-sized instanton in quantum mechanical model. It is shown that the Euclidean probability amplitude derived through a dilute gas approximation not only cannot explain the result of the linear combination of atomic orbitals approximation, but also does not exhibit a proper limiting case when the size of

D. K. Park; Soo-Young Lee; Jae-Rok Kahng; Sahng-Kyoon Yoo; C. H. Lee; Chang Soo Park; Eui-Soon Yim

1996-01-01

283

RESEARCH ARTICLE Advantages of dilution in the connectivity  

E-print Network

Edmund T. Rolls Oxford Centre for Computational Neuroscience, Oxford, UK Received 5 March 2012; received and correctly retrieved), below the normal large capacity for diluted connectivity. Diluted connectivity between.bica.2012.03.003 E-mail address: Edmund.Rolls@oxcns.org URL: http://www.oxcns.org Biologically Inspired

Rolls, Edmund T.

284

A PRESSURIZED PROPORTIONAL DILUTER FOR AQUATIC TOXICOLOGICAL STUDIES  

EPA Science Inventory

A half-liter proportional diluter using positive pressure was designed and tested. Its primary siphons are activated by a pulse of pressure instead of by a partial vacuum as in conventional diluters. This method eliminated the need for venturi tubes, vacuum manifolds, and individ...

285

Modeling of Axisymmetric Two-phase Dilute Flows  

Microsoft Academic Search

This paper deals with the numerical treatment of Eulerian approach for dilute two-phase compressible flows (gas-particles mixtures) in axisymmetric configurations. For dilute flows, two classes of models depending on the dispersed phase volumetric fraction can be found. The volume occupied by the particles may be considered, that yields a model in which the gas phase and the dispersed phase equations

E. Daniel; R. Saurel; J. C. Loraud

1998-01-01

286

Solid-phase microextraction and gas chromatography olfactometry analysis of successively diluted samples. A new approach of the aroma extract dilution analysis applied to the characterization of wine aroma.  

PubMed

The relationship between the composition and the aroma of the wine can be established by using gas chromatography with olfactometric detection (sniffing or GCO), which combines the chromatographic response with the human nose response. To evaluate the contribution of the odor compounds in wine aroma, we designed a new approach of the aroma extract dilution analysis (AEDA) that lies in the GCO analysis of serially diluted wine samples using headspace solid-phase microextraction (HS-SPME) as the extraction technique. The fiber coating used was Flex divinyl-carboxen-polydimethylsiloxane. The method developed was applied to determine the aromatic composition of a red Grenache wine from Priorat (Spain). The method allows 38 important odorants to be determined in the AEDA study, 30 of them precisely identified. These results are similar to those reported by other studies related to this variety of wine. HS-SPME is a suitable technique to obtain representative extracts of wine aroma with several advantages such as simplicity, speediness, and little sample manipulation. PMID:14690365

Martí, Maria Pilar; Mestres, Montserrat; Sala, Cristina; Busto, Olga; Guasch, Josep

2003-12-31

287

Dilute Surfactant Methods for Carbonate Formations  

SciTech Connect

There are many fractured carbonate reservoirs in US (and the world) with light oil. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). The process of using dilute anionic surfactants in alkaline solutions has been investigated in this work for oil recovery from fractured oil-wet carbonate reservoirs both experimentally and numerically. This process is a surfactant-aided gravity drainage where surfactant diffuses into the matrix, lowers IFT and contact angle, which decrease capillary pressure and increase oil relative permeability enabling gravity to drain the oil up. Anionic surfactants have been identified which at dilute concentration of 0.05 wt% and optimal salinity can lower the interfacial tension and change the wettability of the calcite surface to intermediate/water-wet condition as well or better than the cationic surfactant DTAB with a West Texas crude oil. The force of adhesion in AFM of oil-wet regions changes after anionic surfactant treatment to values similar to those of water-wet regions. The AFM topography images showed that the oil-wetting material was removed from the surface by the anionic surfactant treatment. Adsorption studies indicate that the extent of adsorption for anionic surfactants on calcite minerals decreases with increase in pH and with decrease in salinity. Surfactant adsorption can be minimized in the presence of Na{sub 2}CO{sub 3}. Laboratory-scale surfactant brine imbibition experiments give high oil recovery (20-42% OOIP in 50 days; up to 60% in 200 days) for initially oil-wet cores through wettability alteration and IFT reduction. Small (<10%) initial gas saturation does not affect significantly the rate of oil recovery in the imbibition process, but larger gas saturation decreases the oil recovery rate. As the core permeability decreases, the rate of oil recovery reduces, and this reduction can be scaled by the gravitational dimensionless time. Mechanistic simulation of core-scale surfactant brine imbibition matches the experimentally observed imbibition data. In-situ distributions observed through simulation indicate that surfactant diffusion (which depends on temperature and molecular weight) is the rate limiting step. Most of the oil is recovered through gravitational forces. Oil left behind at the end of this process is at its residual oil saturation. The capillary and Bond numbers are not large enough to affect the residual oil saturation. At the field-scale, 50% of the recoverable oil is produced in about 3 years if the fracture spacing is 1 m and 25% if 10 m, in the example simulated. Decreasing fracture spacing and height, increasing permeability, and increasing the extent of wettability alteration increase the rate of oil recovery from surfactant-aided gravity drainage. This dilute surfactant aided gravity-drainage process is relatively cheap. The chemical cost for a barrel of oil produced is expected to be less than $1.

Kishore K. Mohanty

2006-02-01

288

Specialized postsynaptic morphology enhances neurotransmitter dilution and high-frequency signaling at an auditory synapse.  

PubMed

Sensory processing in the auditory system requires that synapses, neurons, and circuits encode information with particularly high temporal and spectral precision. In the amphibian papillia, sound frequencies up to 1 kHz are encoded along a tonotopic array of hair cells and transmitted to afferent fibers via fast, repetitive synaptic transmission, thereby promoting phase locking between the presynaptic and postsynaptic cells. Here, we have combined serial section electron microscopy, paired electrophysiological recordings, and Monte Carlo diffusion simulations to examine novel mechanisms that facilitate fast synaptic transmission in the inner ear of frogs (Rana catesbeiana and Rana pipiens). Three-dimensional anatomical reconstructions reveal specialized spine-like contacts between individual afferent fibers and hair cells that are surrounded by large, open regions of extracellular space. Morphologically realistic diffusion simulations suggest that these local enlargements in extracellular space speed transmitter clearance and reduce spillover between neighboring synapses, thereby minimizing postsynaptic receptor desensitization and improving sensitivity during prolonged signal transmission. Additionally, evoked EPSCs in afferent fibers are unaffected by glutamate transporter blockade, suggesting that transmitter diffusion and dilution, and not uptake, play a primary role in speeding neurotransmission and ensuring fidelity at these synapses. PMID:24920639

Graydon, Cole W; Cho, Soyoun; Diamond, Jeffrey S; Kachar, Bechara; von Gersdorff, Henrique; Grimes, William N

2014-06-11

289

Specialized Postsynaptic Morphology Enhances Neurotransmitter Dilution and High-Frequency Signaling at an Auditory Synapse  

PubMed Central

Sensory processing in the auditory system requires that synapses, neurons, and circuits encode information with particularly high temporal and spectral precision. In the amphibian papillia, sound frequencies up to 1 kHz are encoded along a tonotopic array of hair cells and transmitted to afferent fibers via fast, repetitive synaptic transmission, thereby promoting phase locking between the presynaptic and postsynaptic cells. Here, we have combined serial section electron microscopy, paired electrophysiological recordings, and Monte Carlo diffusion simulations to examine novel mechanisms that facilitate fast synaptic transmission in the inner ear of frogs (Rana catesbeiana and Rana pipiens). Three-dimensional anatomical reconstructions reveal specialized spine-like contacts between individual afferent fibers and hair cells that are surrounded by large, open regions of extracellular space. Morphologically realistic diffusion simulations suggest that these local enlargements in extracellular space speed transmitter clearance and reduce spillover between neighboring synapses, thereby minimizing postsynaptic receptor desensitization and improving sensitivity during prolonged signal transmission. Additionally, evoked EPSCs in afferent fibers are unaffected by glutamate transporter blockade, suggesting that transmitter diffusion and dilution, and not uptake, play a primary role in speeding neurotransmission and ensuring fidelity at these synapses. PMID:24920639

Graydon, Cole W.; Cho, Soyoun; Diamond, Jeffrey S.; Kachar, Bechara; von Gersdorff, Henrique

2014-01-01

290

Comparison of fluorescence optical respirometry and microbroth dilution methods for testing antimicrobial compounds.  

PubMed

An analysis of the usefulness of the fluorescence optical respirometry test method to study several antimicrobials was performed. An oxygen-sensitive sensor: ruthenium-tris(4,7-diphenyl-1,10-phenanthroline) dichloride (Ru(DPP)3Cl2), the phosphorescence of which is quenched by molecular oxygen, was synthesised according to a method modified by us and then applied. A prototype sensitive measurement system was designed and constructed. Analyses of the impact of various antimicrobial chemical factors were performed: ampicillin, co-trimoxazole, nystatin, and newly synthesised compounds. It was shown that optical respirometry allows for analysis of the culture growth kinetics of bacteria and fungi and determination of cell growth parameters. It was shown also that MIC values obtained by fluorescence optical respirometry are consistent with the results of the MIC determinations made by serial dilution method (traditional MIC testing using CLSI). The method allows the time to obtain results to be significantly reduced (from 24-48h to 5-7h for bacteria and 24 yeasts) and allows the effect of concentrations below the MIC for the metabolic activity of microorganisms to be monitored. The sensitivity of the method allowed the volume of the tested samples to be lessened from 160?l to 50?l. Fluorescence optical respirometry allows for the rapid detection and evaluation of the action of various chemical compounds on the metabolic activity of microorganisms in real-time measurement of fluorescence intensity. PMID:25307692

Ha?asa, R; Turecka, K; Orlewska, C; Werel, W

2014-12-01

291

Room-temperature macromolecular serial crystallography using synchrotron radiation.  

PubMed

A new approach for collecting data from many hundreds of thousands of microcrystals using X-ray pulses from a free-electron laser has recently been developed. Referred to as serial crystallography, diffraction patterns are recorded at a constant rate as a suspension of protein crystals flows across the path of an X-ray beam. Events that by chance contain single-crystal diffraction patterns are retained, then indexed and merged to form a three-dimensional set of reflection intensities for structure determination. This approach relies upon several innovations: an intense X-ray beam; a fast detector system; a means to rapidly flow a suspension of crystals across the X-ray beam; and the computational infrastructure to process the large volume of data. Originally conceived for radiation-damage-free measurements with ultrafast X-ray pulses, the same methods can be employed with synchrotron radiation. As in powder diffraction, the averaging of thousands of observations per Bragg peak may improve the ratio of signal to noise of low-dose exposures. Here, it is shown that this paradigm can be implemented for room-temperature data collection using synchrotron radiation and exposure times of less than 3?ms. Using lysozyme microcrystals as a model system, over 40?000 single-crystal diffraction patterns were obtained and merged to produce a structural model that could be refined to 2.1?Å resolution. The resulting electron density is in excellent agreement with that obtained using standard X-ray data collection techniques. With further improvements the method is well suited for even shorter exposures at future and upgraded synchrotron radiation facilities that may deliver beams with 1000 times higher brightness than they currently produce. PMID:25075341

Stellato, Francesco; Oberthür, Dominik; Liang, Mengning; Bean, Richard; Gati, Cornelius; Yefanov, Oleksandr; Barty, Anton; Burkhardt, Anja; Fischer, Pontus; Galli, Lorenzo; Kirian, Richard A; Meyer, Jan; Panneerselvam, Saravanan; Yoon, Chun Hong; Chervinskii, Fedor; Speller, Emily; White, Thomas A; Betzel, Christian; Meents, Alke; Chapman, Henry N

2014-07-01

292

Cancer therapy and cardiotoxicity: The need of serial Doppler echocardiography  

PubMed Central

Cancer therapy has shown terrific progress leading to important reduction of morbidity and mortality of several kinds of cancer. The therapeutic management of oncologic patients includes combinations of drugs, radiation therapy and surgery. Many of these therapies produce adverse cardiovascular complications which may negatively affect both the quality of life and the prognosis. For several years the most common noninvasive method of monitoring cardiotoxicity has been represented by radionuclide ventriculography while other tests as effort EKG and stress myocardial perfusion imaging may detect ischemic complications, and 24-hour Holter monitoring unmask suspected arrhythmias. Also biomarkers such as troponine I and T and B-type natriuretic peptide may be useful for early detection of cardiotoxicity. Today, the widely used non-invasive method of monitoring cardiotoxicity of cancer therapy is, however, represented by Doppler-echocardiography which allows to identify the main forms of cardiac complications of cancer therapy: left ventricular (systolic and diastolic) dysfunction, valve heart disease, pericarditis and pericardial effusion, carotid artery lesions. Advanced ultrasound tools, as Integrated Backscatter and Tissue Doppler, but also simple ultrasound detection of "lung comet" on the anterior and lateral chest can be helpful for early, subclinical diagnosis of cardiac involvement. Serial Doppler echocardiographic evaluation has to be encouraged in the oncologic patients, before, during and even late after therapy completion. This is crucial when using anthracyclines, which have early but, most importantly, late, cumulative cardiac toxicity. The echocardiographic monitoring appears even indispensable after radiation therapy, whose detrimental effects may appear several years after the end of irradiation. PMID:17254324

Galderisi, Maurizio; Marra, Francesco; Esposito, Roberta; Lomoriello, Vincenzo Schiano; Pardo, Moira; de Divitiis, Oreste

2007-01-01

293

Herative Decoding of Serially Concatenated Codes with Interleavers and Comparison with Turbo Codes  

NASA Technical Reports Server (NTRS)

A serially concatenated code with interleaver consists of the cascade of an outer encoder, an interleaver permuting the outer codewords bits, and an inner encoder whose input words are the permuted outer codewords.

Benedetto, S.; Montorsi, G.; Divsalar, D.; Pollara, F.

1997-01-01

294

The Paranormal: A Selected Bibliography of Serials and Reference Works, with Commentary.  

ERIC Educational Resources Information Center

Provides bibliography of references and serials to assist acquisitions librarians in selection of the paranormal. Topics include alchemy, astrology, magic, conjuring, witchcraft, paganism, demonology, satanism, voodooism, sorcery, cults, shamanism, UFOs, exobiology, curious physical and biological phenomena, ghosts, poltergeists, haunted places,…

Smith, Charles H.

1997-01-01

295

77 FR 66920 - Registration of Claims to Copyright: Group Registration of Serial Issues Filed Electronically  

Federal Register 2010, 2011, 2012, 2013, 2014

...LIBRARY OF CONGRESS Copyright Office 37 CFR Part...Electronically AGENCY: Copyright Office, Library of Congress. ACTION: Interim regulations...subscription copies of the serial promptly to the Library of Congress as a condition of...

2012-11-08

296

Flexible Serial Response Learning by Pigeons (Columba livia) and Humans (Homo sapiens)  

E-print Network

Flexible Serial Response Learning by Pigeons (Columba livia) and Humans (Homo sapiens) Walter T to each target was measured. Pigeons (Columba livia) and humans (Homo sapiens) both showed response time

Herbranson, Wally

297

Serial and Parallel Genetic Algorithms as Function Optimizers V. Scott Gordon  

E-print Network

Serial and Parallel Genetic Algorithms as Function Optimizers V. Scott Gordon Department of Computer Science Colorado State University Fort Collins, Colorado 80523 Darrell Whitley Department of Computer Science Colorado State University Fort Collins, Colorado 80523 Abstract Parallel genetic

Whitley, Darrell

298

Geometric Design of Spherical Serial Chains with Curvature Constraints in the Environment  

E-print Network

This research builds up on recent results in planar kinematic synthesis with contact direction and curvature constraints on the workpiece. The synthesis of spherical serial chains is considered to guide a rigid body, such that it does not violate...

Tolety, Anurag Bharadwaj

2012-10-19

299

DILUTE SURFACTANT METHODS FOR CARBONATE FORMATIONS  

SciTech Connect

There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effective in these reservoirs. Surfactant flooding (or huff-n-puff) is the only hope, yet it was developed for sandstone reservoirs in the past. The goal of this research is to evaluate dilute (hence relatively inexpensive) surfactant methods for carbonate formations and identify conditions under which they can be effective. Imbibition in an originally oil-wet 2D capillary is the fastest in the case of Alf-38 and slowest in the case of DTAB (among the surfactants studied). Force of adhesion studies and contact angle measurements show that greater wettability alteration is possible with these anionic surfactants than the cationic surfactant studied. The water imbibition rate does not increase monotonically with an increase in the surfactant concentration. A numerical model has been developed that fits the rate of imbibition. Plans for the next quarter include conducting simulation and imbibition studies.

Kishore K. Mohanty

2005-01-01

300

Chain Dynamics in a Dilute Magnetorheological Fluid  

NASA Technical Reports Server (NTRS)

The structure, formation, and dynamics of dilute, mono-dispersive ferrofluid emulsions in an external magnetic field have been investigated using dynamic light scattering techniques. In the absence of the magnetic field, the emulsion particles are randomly distributed and behave like hard spheres in Brownian motion. An applied magnetic field induces a magnetic dipole moment in each particle. Dipolar interactions between particles align them into chains where correlation functions show two decay processes. The short-time decay shows the motion of straight chains as a whole where the apparent chain length increases with the applied magnetic field and the particle volume fraction. Good scaling results are obtained showing that the apparent chain length grows with time following a power law with exponent of 0.6 and depends on the applied field, particle volume fraction, and diffusion constant of the particles. The long-time decay in the correlation function shows oscillation when the chains reach a certain length with time and stiffness with threshold field This result shows that chains not only fluctuate, but move in a periodic motion with a frequency of 364 Hz at lambda = 15. It may suggest the existence of phonons. This work is the first step in the understanding of the structure formation, especially chain coarsening mechanism, of magnetorheological (MR) fluids at higher volume fractions.

Liu, Jing; Hagenbuchle, Martin

1996-01-01

301

Dilute acid hydrolysis of wheat straw oligosaccharides.  

PubMed

The dilute acid posthydrolysis of wheat straw hemicellulosic oligosaccharides obtained by autohydrolysis was evaluated. An empirical model was used to describe the effect of catalyst concentration (sulfuric acid, 0.1-4% w/w) and reaction time (0-60 min) based on data from a Doehlert experimental design. Catalyst concentration is the main variable influencing posthydrolysis performance, as both its linear and quadratic coefficients are statistically significant for the majority of the studied variables, namely, the ones related to sugar and byproducts production. Reaction time influences xylose and furan derivatives concentrations but not phenolics or acetic acid content. Catalyst concentration and reaction time interact synergistically, minimizing sugar recovery and promoting furan derivatives production. Based on the proposed models, it was possible to delimit an operational range that enables to obtain high monosaccharides recovery together with a slight decrease in inhibitors content as compared to the standard acid hydrolysis treatment. Furthermore, this is achieved with up to 70% less acid spending or considerable savings on reaction time. PMID:19043676

Duarte, Luís C; Silva-Fernandes, Talita; Carvalheiro, Florbela; Gírio, Francisco M

2009-05-01

302

DILUTE SURFACTANT METHODS FOR CARBONATE FORMATIONS  

SciTech Connect

There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effective in these reservoirs. Surfactant flooding (or huff-n-puff) is the only hope, yet it was developed for sandstone reservoirs in the past. The goal of this research is to evaluate dilute (hence relatively inexpensive) surfactant methods for carbonate formations and identify conditions under which they can be effective. Laboratory imbibition tests show about 61% oil recovery in the case of Alf-38 and 37% in the case of DTAB. A numerical model has been developed that fits the rate of imbibition of the laboratory experiment. Field-scale fracture block simulation shows that as the fracture spacing increases, so does the time of recovery. Plans for the next quarter include simulation studies.

Kishore K. Mohanty

2005-04-01

303

Dilute Surfactant Methods for Carbonate Formations  

SciTech Connect

There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effective in these reservoirs. Surfactant flooding (or huff-n-puff) is the only hope, yet it was developed for sandstone reservoirs in the past. The goal of this research is to evaluate dilute (hence relatively inexpensive) surfactant methods for carbonate formations and identify conditions under which they can be effective. Anionic surfactants (Alfoterra 35, 38) recover more than 40% of the oil in about 50 days by imbibition driven by wettability alteration in the core-scale. Anionic surfactant, Alfoterra-68, recovers about 28% of the oil by lower tension aided gravity-driven imbibition in the core-scale. Residual oil saturation showed little capillary number dependence between 10{sup -5} and 10{sup -2}. Wettability alteration increases as the number of ethoxy groups increases in ethoxy sulfate surfactants. Plans for the next quarter include conducting mobilization, and imbibition studies.

Kishore K. Mohanty

2004-03-31

304

DILUTE SURFACTANT METHODS FOR CARBONATE FORMATIONS  

SciTech Connect

There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effective in these reservoirs. Surfactant flooding (or huff-n-puff) is the only hope, yet it was developed for sandstone reservoirs in the past. The goal of this research is to evaluate dilute (hence relatively inexpensive) surfactant methods for carbonate formations and identify conditions under which they can be effective. We have conducted adsorption, phase behavior, interfacial tension (IFT) and wettability studies. Alfoterra-38 (0.05 wt%), Alfoterra-35 (0.05 wt%), SS-6656 (0.05 wt%), and DTAB (1 wt%) altered the wettability of the initially oil-wet calcite plate to an intermediate/water-wet state. Low IFT ({approx}10{sup -3} dynes/cm) is obtained with surfactants 5-166, Alfoterra-33 and Alfoterra-38. Plans for the next quarter include conducting wettability and mobilization studies.

Kishore K. Mohanty

2003-10-01

305

DILUTE SURFACTANT METHODS FOR CARBONATE FORMATIONS  

SciTech Connect

There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effective in these reservoirs. Surfactant flooding (or huff-n-puff) is the only hope, yet it was developed for sandstone reservoirs in the past. The goal of this research is to evaluate dilute (hence relatively inexpensive) surfactant methods for carbonate formations and identify conditions under which they can be effective. Anionic surfactants (SS-6656, Alfoterra 35, 38, 63,65,68) have been identified which can change the wettability of the calcite surface to intermediate/water-wet condition as well or better than the cationic surfactant DTAB with a West Texas crude oil in the presence of Na{sub 2}CO{sub 3}. All the carbonate surfaces (Lithographic Limestone, Marble, Dolomite and Calcite) show similar behavior with respect to wettability alteration with surfactant 4-22. Anionic surfactants (5-166, Alfoterra-33 and Alfoterra-38 and Alfoterra-68), which lower the interfacial tension with a West Texas crude oil to very low values (<10{sup -2} nM/m), have also been identified. Plans for the next quarter include conducting wettability, mobilization, and imbibition studies.

Kishore K. Mohanty

2004-01-01

306

DILUTE SURFACTANT METHODS FOR CARBONATE FORMATIONS  

SciTech Connect

There are many carbonate reservoirs in US (and the world) with light oil and fracture pressure below its minimum miscibility pressure (or reservoir may be naturally fractured). Many carbonate reservoirs are naturally fractured. Waterflooding is effective in fractured reservoirs, if the formation is water-wet. Many fractured carbonate reservoirs, however, are mixed-wet and recoveries with conventional methods are low (less than 10%). Thermal and miscible tertiary recovery techniques are not effective in these reservoirs. Surfactant flooding (or huff-n-puff) is the only hope, yet it was developed for sandstone reservoirs in the past. The goal of this research is to evaluate dilute (hence relatively inexpensive) surfactant methods for carbonate formations and identify conditions under which they can be effective. Simulation studies indicate that both wettability alteration and gravity-driven flow play significant role in oil recovery from fractured carbonates. Anionic surfactants (Alfoterra 35, 38) recover about 55% of the oil in about 150 days by imbibition driven by wettability alteration and low tension in the core-scale. Anionic surfactant, Alfoterra-68, recovers about 40% of the oil by lower tension aided gravity-driven imbibition in the core-scale. Cationic surfactant, DTAB recovers about 35% of the oil. Plans for the next quarter include conducting simulation and imbibition studies.

Kishore K. Mohanty

2004-10-01

307

Microscopy of DNA in dilute polymer solutions  

SciTech Connect

The mechanism of separation of DNA in polymer solutions is not well understood. In this paper the authors use epifluorescence videomicroscopy to investigate the dynamic behavior of DNA electrophoresing through dilute polymer solutions. DNA collides with polymer obstacles, which cause the conformation of DNA to change from the globular, random coil conformation it takes in free solution. There are two main types of DNA-polymer collisions: U-shape collisions and brief collisions. In U-shape collisions, the DNA collides with a polymer obstacle, extends into a U-shape, and then slides around the polymer obstacle like a pulley. There are occasionally multiple entanglement points, causing the DNA to take more complex conformations, such as W-shapes. In the brief collision process, the DNA collides with a polymer obstacle and begins to extend but then collapses back into its globular conformation before a full U-shape is formed. The frequency of these interactions increases as the DNA size increases, and it also increases when the polymer size or concentration increases. These data support the transient entanglement coupling mechanism of separation of DNA, which states that entanglements between DNA and polymer molecules result in the separation of DNA.

Sunada, W.M.; Blanch, H.W. [Univ. of California, Berkeley, CA (United States). Dept. of Chemical Engineering] [Univ. of California, Berkeley, CA (United States). Dept. of Chemical Engineering

1998-09-01

308

Serum-free Media for Culturing and Serial-Passaging of Adult Human Retinal Pigment Epithelium  

Microsoft Academic Search

The ability of a chemically-defined serum-free culture medium to support the attachment, growth and serial passaging of primary adult human retinal pigment epithelial (RPE) cells was studied. Primary cultures of adult human RPE were established in a chemically-defined serum-free culture medium on both bare or bovine corneal endothelial extracellular matrix-coated tissue-culture plastic. Confluent cells were serially passaged in chemically-defined serum-free

TONGALP H. TEZEL; LUCIAN V. DEL PRIORE

1998-01-01

309

Fast test method for serial A\\/D and D\\/A converters  

Microsoft Academic Search

An efficient test method for so-called serial analog\\/digital (A\\/D) and D\\/A converters which can be executed on digital automated test equipment is described. The method is applicable for stand-alone converters and for mixed-signal devices containing this type of converters. The proposed solution makes use of some special properties of serial converters. The method consists of a measurement of the output

A. Jongepier

1989-01-01

310

Experimental fixed bed adsorption dynamics with moments analysis and serial cell model simulation  

E-print Network

EXPERIIPNTAL FIXED BED ADSORPTION DYNA. , IICS 1YITH MOiitEIZI'S ANALYSIS AIID SERIAL CEI, L MODEL S11KLATION A Thesis EUGENE 0' GORMAN Submitted to the Graduate College of Texas AQI University in oartial fulfillment of the requirement... for the degree of MAS'1ER OF SCIENCE May 1976 Major Subject: Chemical Engineering EXPERIMENTAL FIXED BED ADSORPTION DYNAMOS WITH MOMENTS ANALYSIS AND SERIAL CELL MODEL SDAJIATION A Thesis EUGENE O'GORMAN Approved as to style and content by: ~ch ' . : f...

O'Gorman, Eugene

2012-06-07

311

Serial reaction time learning and Parkinson's disease: Evidence for a procedural learning deficit  

Microsoft Academic Search

This paper presents evidence in support of a serial reaction time (SRT) deficit associated with Parkinson's disease, and related to the acquisition or execution of serial-order information. Eleven patients with idiopathic Parkinson's disease, and 10 age-matched but otherwise healthy control subjects, were compared on a variant of the SRT task introduced by Nissen and Bullemer (Cognit. Psychol.19, 1–32, 1987). The

Georgina M. Jackson; Stephen R. Jackson; John Harrison; Leslie Henderson; Christopher Kennard

1995-01-01

312

Word length and age influences on forward and backward immediate serial recall  

Microsoft Academic Search

The present research is aimed at understanding the processes involved in short-term memory and how they interact with age.\\u000a Specifically, word length effects were examined under forward serial recall, backward serial recall, and item recognition\\u000a tasks, with performance being interpreted within an item-order theoretical framework. The interaction of age, word length,\\u000a and direction of recall was examined in two experiments,

Rosemary Baker; Gerald Tehan; Hannah Tehan

313

RS485 serial port pseudo-full-duplex communication research and application  

Microsoft Academic Search

The RS-485 serial port communication is very popular in a monitoring and controlling system. A concept of RS-485 free port pseudo-full-duplex communication is presented in this paper, that is, RS-485 can not only send timed messages continuously but also receive messages at any moment from the host computer. Since RS-485 serial port has the advantage of far distance communication and

Su Xunwen; Wang Shaoping; Zhu Dongmei; Qishen Zhu

2010-01-01

314

Frequency of Serial Sexual Homicide Victimization in Virginia for a Ten-Year Period  

Microsoft Academic Search

ABSTRACT: The frequency of serial sexual murder has been widely discussed, and estimates of the number of victims in the United States range from 500 to 6000 per year. This study attempted,to quantify the number,of serial sexual murder,victims in Virginia for a ten-year period. Multiple sources of data were utilized, including Federal Bureau of Investigation (FBI) case files, FBI’s Violent

James J. McNamara; Robert J. Morton

2004-01-01

315

Transdermal Suctioning Technique for Serial Sampling of Interstitial Fluid in Newborn Infants  

Microsoft Academic Search

Overview: Use of a suction-induced epidermal mini-erosion for serial sampling of dermal interstitial fluid (IF) in 16 newborn infants with gestational age ranging from 24 to 42 weeks is reported. Results: The mini-erosion formed reproducibly and electron microscopy showed that the split was located within the epidermis. IF was sampled serially by suctioning during 1–3 days without signs of stress

I. Hansen-Pupp; K. Håkansson; S. Polberger; P. Svedman

2005-01-01

316

Serially grafted polymer optical waveguides fabricated by light-induced self-written waveguide technique.  

PubMed

Serially grafted polymer optical waveguides were fabricated by the light-induced self-written (LISW) waveguide technique for the first time to our knowledge. To realize functional waveguide cores by the LISW technique, transparent materials at the writing wavelength were selected. By inserting thin transparent partitions, a serial-graft structure consisting of passive and active waveguides without any misalignment was realized automatically. This technique is advantageous for its extremely easy process over conventional fabrication techniques. PMID:18246159

Sugihara, Okihiro; Yasuda, Shuhei; Cai, Bin; Komatsu, Kyoji; Kaino, Toshikuni

2008-02-01

317

Kinematic and dynamic analysis of a novel 6DOF serial manipulator for underground distribution power lines  

Microsoft Academic Search

This paper presents a new 6-DOF serial manipulator with five revolute joints and one prismatic joint, designed to operate equipment inside Hydro-Québec underground distribution vaults. The manipulator is an upgraded model developed after field testing a 6-DOF wrist-partitioned serial manipulator prototype. The new manipulator architecture is intended to solve space constraint problems in some vaults. This paper covers the geometrical

J.-F. Allan; S. Lavoie; S. Reiher; G. Lambert

2011-01-01

318

Finding the answer in space: the mental whiteboard hypothesis on serial order in working memory  

PubMed Central

Various prominent models on serial order coding in working memory (WM) build on the notion that serial order is achieved by binding the various items to-be-maintained to fixed position markers. Despite being relatively successful in accounting for empirical observations and some recent neuro-imaging support, these models were largely formulated on theoretical grounds and few specifications have been provided with respect to the cognitive and/or neural nature of these position markers. Here we outline a hypothesis on a novel candidate mechanism to substantiate the notion of serial position markers. Specifically, we propose that serial order WM is grounded in the spatial attention system: (I) The position markers that provide multi-item WM with a serial context should be understood as coordinates within an internal, spatially defined system; (II) internal spatial attention is involved in searching through the resulting serial order representation; and (III) retrieval corresponds to selection by spatial attention. We sketch the available empirical support and discuss how the hypothesis may provide a parsimonious framework from which to understand a broad range of observations across behavioral, neural and neuropsychological domains. Finally, we pinpoint what we believe are major questions for future research inspired by the hypothesis. PMID:25505394

Abrahamse, Elger; van Dijck, Jean-Philippe; Majerus, Steve; Fias, Wim

2014-01-01

319

Frequency of serial sexual homicide victimization in Virginia for a ten-year period.  

PubMed

The frequency of serial sexual murder has been widely discussed, and estimates of the number of victims in the United States range from 500 to 6000 per year. This study attempted to quantify the number of serial sexual murder victims in Virginia for a ten-year period. Multiple sources of data were utilized, including Federal Bureau of Investigation (FBI) case files, FBI's Violent Criminal Apprehension Program (ViCAP) reports, Virginia State Police ViCAP reports, Virginia Homicide Investigators Association, and the Virginia Division of Forensic Science DNA database, to effectively cull out all the known serial sexual murder victims for the given time period. Review of these records revealed a total of 28 victims of serial sexual murder, compared with a total of 5183 murder victims for the same ten-year period. The frequency of serial sexual victimization was 0.5% of all homicides for the given period. These results highlight the unusual frequency of serial sexual murder. PMID:15171171

McNamara, James J; Morton, Robert J

2004-05-01

320

Heat input and dilution effects in microalloyed steel weld metals  

SciTech Connect

The sensitivity of weld metal microstructure and mechanical properties to variations in both heat input (i.e., cooling rate) and weld dilution in submerged arc (SA) welding of microalloyed steel was examined. Weldments were prepared with weld metal dilutions of approximately 40% and 70% at heat inputs of 2.0, 3.3, 4.6, and 5.3 kJ/mm, using two commercial welding wires and a basic commercial flux. The high dilution welds, which were ordinary bead-on-plate welds, resulted in microstructures that ranged from ferrite with aligned second phase at low heat inputs to acicular ferrite at high heat inputs. Special over-welding techniques were used to make the low dilution welds, allowing use of the same welding parameters as those for the high dilution welds. The technique involved remelting of weld metal to simulate the effect of multipass welding. The microstructure of these welds was predominantly acicular ferrite, independent of heat input. As a consequence, the low dilution welds had superior toughness compared to the high dilution welds.

Hunt, A.C. (Hunt Integrated Technologies, Oklahoma City, OK (United States)); Kluken, A.O. (SINTEF, Trondheim (Norway). Div. of Metallurgy); Edwards, G.R. (Colorado School of Mines, Golden, CO (United States). Center for Welding and Joining Research)

1994-01-01

321

Characteristics of Social Science Serials; The Construction and Analysis of a File of Social Science Serial Titles. Research Reports Series B No. 4.  

ERIC Educational Resources Information Center

This report is in two parts; the first part deals with a construction of a data base for bibliometric studies. The second part provides a detailed account of the results of those studies. Needs for a data base, the search for a possible candidate, and the decision to build the Check List of Social Sciences Serials (CLOSSS) are explained in the…

Nicholas, David; And Others

322

Special dilution refrigerator systems of Milli-Kelvin detector experiments  

SciTech Connect

Several hundred ultra low temperature systems have been designed and built for a variety of applications. One common application is the refrigeration of low temperature detectors. Although many of the requirements are satisfied by standard designs, Oxford Instruments has often built special refrigerators to suit specific detector requirements. A few of the most interesting of these systems will be discussed. (1) dilution refrigerators to cool gravitational wave antennae to 65 mK; (2) rotating dilution refrigerator for cosmic ray detector experiments; (3) compact dilution refrigerator to cool large bolometer arrays within the SCUBA telescope; (4) side access systems for beam line experiments

Batey, G.; Balshaw, N. (Oxford Instruments Ltd., Old Station Way (United Kingdom))

1993-11-01

323

Effect of dilution on carboxymethylcellulase and xylanase assays  

SciTech Connect

It has been demonstrated that the dilution of samples prior to the carboxymethylcellulase and xylanase assays causes serious discrepancies in the numerical values obtained for the enzyme activities. Even when the sample is assayed with the identical procedure, one could obtain different numerical values of the enzyme activity U depending on how much this sample has been diluted before the enzyme assay. Two crude commercial cellulase samples of Aspergillus niger and Trichoderma viride as well as the culture filtrate of our newly isolated acidophilic fungus have been used for the demonstration. An empirical method for reporting the cellulolytic activity by taking into account this dilution effect is proposed.

Cauchon, N.; LeDuy, A.

1984-08-01

324

Shear suppression of critical fluctuations in a diluted polymer blend  

NASA Astrophysics Data System (ADS)

Small-angle neutron scattering has been combined with equilibrium dynamic light scattering to study shear-induced mixing in a diluted high-molecular-weight polymer blend. The data show an enhancement of critical fluctuations upon dilution and are found to collapse onto a universal scaling curve containing no free parameters. This scaling curve is motivated by the theoretical predictions of Onuki and Kawasaki for undiluted binary mixtures. The data also appear to suggest that ``Fisher renormalization'' is relevant in this diluted pseudobinary polymer mixture, consistent with a previous dynamic-light-scattering study.

Hobbie, E. K.; Nakatani, A. I.; Yajima, H.; Douglas, J. F.; Han, C. C.

1996-05-01

325

Dilute oxygen combustion. Phase I report  

SciTech Connect

A novel burner, in which fuel (natural gas) and oxidant (oxygen or air) are separately injected into a furnace, shows promise for achieving very low nitrogen oxide(s) (NO{sub x}) emissions for commercial furnace applications. The dilute oxygen combustion (DOC) burner achieves very low NO{sub x} through in-furnace dilution of the oxidant stream prior to combustion, resulting in low flame temperatures, thus inhibiting thermal NO{sub x} production. The results of a fundamental and applied research effort on the development of the DOC burner are presented. In addition, the results of a market survey detailing the potential commercial impact of the DOC system are disclosed. The fundamental aspects of the burner development project involved examining the flame characteristics of a natural gas turbulent jet in a high-temperature ({approximately}1366 K) oxidant (7-27% O{sub 2} vol. wet). Specifically, the mass entrainment rate, the flame lift-off height, the velocity field and major species field of the jet were evaluated as a function of surrounding-gas temperature and composition. The measured entrainment rate of the fuel jet decreased with increasing oxygen content in the surrounding high-temperature oxidant, and was well represented by the d{sup +} scaling correlation found in the literature. The measured flame lift-off height decreased with increasing oxygen content and increasing temperature of the surrounding gas. An increase in surrounding-gas oxygen content and/or temperature inhibited the velocity decay within the jet periphery as a function of axial distance as compared to isothermal turbulent jets. However, the velocity measurements were only broadly represented by the d{sup +} scaling correlation. Several DOC burner configurations were tested in a laboratory-scale furnace at a nominal firing rate of 185 kW ({approximately}0.63 MMBtu/h). The flue gas composition was recorded as a function of furnace nitrogen content, furnace temperature, burner geometric arrangement, firing rate, and fuel injection velocity. NO{sub x} emissions increased with increasing furnace nitrogen content and furnace temperature, but remained relatively insensitive to variations in fuel injection velocity and firing rate. NO{sub x} emissions below 5{times}10{sup -3} g/MJ (10 ppm-air equivalent at 3% O{sub 2} dry) were obtained for furnace temperatures below 1533 K (2300{degree}F) and furnace nitrogen levels between 1 and 40%. CO emissions were typically low (<35 ppm). Detailed in- furnace species measurements revealed the importance of the interior furnace circulation patterns, as influenced by fuel and oxidant injection schemes, on pollutant emissions. The combustion stability traits of several DOC burner arrangements were ascertained through furnace pressure measurements, with increased stability occurring as furnace temperature increased and as the separation distance between fuel and oxidant inputs decreased. Based on current market conditions, oxy-fuel conversion of batch steel reheat furnaces with a DOC burner is justified on the basis of utility costs alone. However, conversion of continuous steel reheat furnaces, which are responsible for most steel production, requires additional economic incentives, such as further fuel savings, increased furnace productivity, or emission credits.

NONE

1997-10-01

326

Dilute Oxygen Combustion Phase I Final Report  

SciTech Connect

A novel burner, in which fuel (natural gas) and oxidant (oxygen or air) are separately injected into a furnace, shows promise for achieving very low nitrogen oxide(s) (NOx) emissions for commercial furnace applications. The dilute oxygen combustion (DOC) burner achieves very low NOx through in-furnace dilution of the oxidant stream prior to combustion, resulting in low flame temperatures, thus inhibiting thermal NOx production. The results of a fundamental and applied research effort on the development of the DOC burner are presented. In addition, the results of a market survey detailing the potential commercial impact of the DOC system are disclosed. The fundamental aspects of the burner development project involved examining the flame characteristics of a natural gas turbulent jet in a high-temperature (~1366 K) oxidant (7-27% O2 vol. wet). Specifically, the mass entrainment rate, the flame lift-off height, the velocity field and major species field of the jet were evaluated as a function of surrounding-gas temperature and composition. The measured entrainment rate of the fuel jet decreased with increasing oxygen content in the surrounding high-temperature oxidant, and was well represented by the d+ scaling correlation found in the literature. The measured flame lift-off height decreased with increasing oxygen content and increasing temperature of the surrounding gas. An increase in surrounding-gas oxygen content and/or temperature inhibited the velocity decay within the jet periphery as a function of axial distance as compared to isothermal turbulent jets. However, the velocity measurements were only broadly represented by the d+ scaling correlation. Several DOC burner configurations were tested in a laboratory-scale furnace at a nominal firing rate of 185 kW (~0.63 MMBtu/h). The flue gas composition was recorded as a function of furnace nitrogen content, furnace temperature, burner geometric arrangement, firing rate, and fuel injection velocity. NOx emissions increased with increasing furnace nitrogen content and furnace temperature, but remained relatively insensitive to variations in fuel injection velocity and firing rate. NOx emissions below 5-10-3 g/MJ (10 ppm-air equivalent at 3% O2 dry) were obtained for furnace temperatures below 1533 K (2300°F) and furnace nitrogen levels between 1 and 40%. CO emissions were typically low (<35 ppm). Detailed in-furnace species measurements revealed the importance of the interior furnace circulation patterns, as influenced by fuel and oxidant injection schemes, on pollutant emissions. The combustion stability traits of several DOC burner arrangements were ascertained through furnace pressure measurements, wit6h increased stability occurring as furnace temperature increased and as the separation distance between fuel and oxidant inputs decreased. Based on current market conditions, oxy-fuel conversion of batch steel reheat furnaces with a DOC burner is justified on the basis of lower utility costs alone. However, conversion of continuous steel reheat furnaces, which are responsible for most steel production, required additional economic incentives, such as further fuel savings, increased furnace productivity, or emission credits.

Ryan, H.M.; Riley, M.F.; Kobayashi, H.

1997-10-31

327

Bacterial survival in a dilute environment.  

PubMed Central

Bacteria were isolated from lake water, and their ability to remain viable in a dilute, nutrient-deficient environment was tested by a method that permits suspension of test bacteria between two appressed microporous membranes in an aqueous environment. This approach permitted separation of the lake isolates into two categories. Members of the tribe Klebsielleae were shown to have a prolonged survival rate of 40% or better after 24 h, whereas nonsurvivors were not viable for much longer than 24 h. These nonsurvivors belonged to the genera Acinetobacter, Aeromonas, Alcaligenes, Erwinia, Escherichia, Flavobacterium, and Pseudomonas. Differences in ribonuclease and adenosine triphosphatase levels between Escherichia coli (nonsurvivor) and Klebsiella (survivor) cells were detected. At pH 7.5, stressed E. coli cells contained 14% of the adenosine triphosphatase activity detected in the control, whereas at pH 5.5, in the presence of calcium ions, these same cells contained 50% of the control adenosine triphosphatase levels. At pH 7.2, E. coli cells were strongly inhibited by an adenosine triphosphatase inhibitor, bathophenanthroline (88%); oligomycin (64%); and the proton ionophore carbonyl- cyanide-m-chlorophenyl hydrazone (67%). Both sodium azide and valinomycin were only moderately inhibitory (15 and 28%, respectively). Although the ability to scavenge internal endogenous reserves seems important, we postulate that certain enteric bacteria are capable of utilizing acidic conditions (pH 5.5) as an electrochemical gradient to generate necessary high-energy intermediates for prolongation of survival beyond that possible in environments of near-neutraL pH. PMID:6454390

Sjogren, R E; Gibson, M J

1981-01-01

328

Ionic liquids behave as dilute electrolyte solutions  

PubMed Central

We combine direct surface force measurements with thermodynamic arguments to demonstrate that pure ionic liquids are expected to behave as dilute weak electrolyte solutions, with typical effective dissociated ion concentrations of less than 0.1% at room temperature. We performed equilibrium force–distance measurements across the common ionic liquid 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C4mim][NTf2]) using a surface forces apparatus with in situ electrochemical control and quantitatively modeled these measurements using the van der Waals and electrostatic double-layer forces of the Derjaguin–Landau–Verwey–Overbeek theory with an additive repulsive steric (entropic) ion–surface binding force. Our results indicate that ionic liquids screen charged surfaces through the formation of both bound (Stern) and diffuse electric double layers, where the diffuse double layer is comprised of effectively dissociated ionic liquid ions. Additionally, we used the energetics of thermally dissociating ions in a dielectric medium to quantitatively predict the equilibrium for the effective dissociation reaction of [C4mim][NTf2] ions, in excellent agreement with the measured Debye length. Our results clearly demonstrate that, outside of the bound double layer, most of the ions in [C4mim][NTf2] are not effectively dissociated and thus do not contribute to electrostatic screening. We also provide a general, molecular-scale framework for designing ionic liquids with significantly increased dissociated charge densities via judiciously balancing ion pair interactions with bulk dielectric properties. Our results clear up several inconsistencies that have hampered scientific progress in this important area and guide the rational design of unique, high–free-ion density ionic liquids and ionic liquid blends. PMID:23716690

Gebbie, Matthew A.; Valtiner, Markus; Banquy, Xavier; Fox, Eric T.; Henderson, Wesley A.; Israelachvili, Jacob N.

2013-01-01

329

Study of Co doped ZnO diluted magnetic semiconductor with various oxygen vacancies.  

E-print Network

??The dilute magnetic semiconductors is the semiconductor materials doped with transition elements, capable of room temperature ferromagnetism. However, the mechanism of oxide diluted magnetic semiconductor… (more)

Wang , Jheng-Yi

2014-01-01

330

Effect of different attentional instructions on the acquisition of a serial movement task.  

PubMed

Recent research in attentional focus of instruction has predominantly over-emphasized the investigation of discrete and continuous skills rather than serial skills. The purpose of this study was therefore to examine the effect of different attentional focus instructions on learning a serial skill task (i.e., taekwondo routine) in novice learners. It was predicted that the use of movement outcome instructions could enhance the learning of a serial skill as previously supported in studies examining the acquisition of discrete and continuous skills. Thirteen female participants were recruited for this study and were assigned to either movement form condition - control group (n = 7) or movement outcome condition - treatment group (n = 6). All participants underwent 12 practice sessions over an 8-week period with their respective instructional conditions with each session lasting 30 minutes. Video recording of the serial skill tasks (hand techniques, kicking techniques and 10-step routine) were captured at "the-twelfth-training session", "after 1-week", and "after 1-month". It was found that more participants in the treatment group obtained a higher score in all three serial skill tasks, especially in Mastery component of 'Kicking' techniques at 'after 1-week' (p < 0.05, r = 0.57). This study suggested that movement outcome instructions have positive medium effect on balance control for serial skill task, especially in kicking actions. Key PointsMovement outcome (MO) instructions have a positive impact on learning a serial task, especially in kicking actions.More functional coordination during movement executions for MO participants.Benefits for MO instructions may be individual specific. PMID:25435770

Woo, Mei Teng; Chow, Jia Yi; Koh, Michael

2014-12-01

331

Charge and magnetization inhomogeneities in diluted magnetic semiconductors  

E-print Network

It is predicted that III-V diluted magnetic semiconductors can exhibit stripelike modulations of magnetization and carrier concentration. This inhomogeneity results from the strong dependence of the magnetization on the carrier concentration. Within...

Timm, Carsten

2006-03-01

332

21 CFR 866.2500 - Microtiter diluting and dispensing device.  

Code of Federal Regulations, 2013 CFR

... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES IMMUNOLOGY AND MICROBIOLOGY DEVICES Microbiology Devices § 866.2500 Microtiter diluting and dispensing device. (a)...

2013-04-01

333

21 CFR 866.2500 - Microtiter diluting and dispensing device.  

Code of Federal Regulations, 2010 CFR

... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES IMMUNOLOGY AND MICROBIOLOGY DEVICES Microbiology Devices § 866.2500 Microtiter diluting and dispensing device. (a)...

2010-04-01

334

21 CFR 866.2500 - Microtiter diluting and dispensing device.  

Code of Federal Regulations, 2011 CFR

... Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES IMMUNOLOGY AND MICROBIOLOGY DEVICES Microbiology Devices § 866.2500 Microtiter diluting and dispensing device. (a)...

2011-04-01

335

USE OF LINED PITS FOR DISPOSAL OF DILUTE PESTICIDE WASTE  

EPA Science Inventory

Modern agricultural practices rely heavily on the use of pesticides to sustain high productivity. When pesticide containers and application equipment are rinsed after use, the contaminated water requires proper disposal. At Iowa State University in Ames, Iowa, dilute pesticide ri...

336

Fully portable, highly flexible dilution refrigerator systems for neutron scattering  

E-print Network

775 Fully portable, highly flexible dilution refrigerator systems for neutron scattering P. A systems developed specifically for neutron scattering environ- ments. The refrigerators are completely relatively recently however, the lowest temperatures available in almost all neutron scattering laboratories

Boyer, Edmond

337

Contraction/expansion flow of dilute elastic solutions in microchannels  

E-print Network

An experimental study is conducted on the nature of extensional flows of mobile dilute polymer solutions in microchannel. By observing such fluids on the microscale it is possible to generate large strain rates ([approximately] ...

Scott, Timothy Peter, 1980-

2004-01-01

338

33 CFR 154.2107 - Inerting, enriching, and diluting systems.  

Code of Federal Regulations, 2014 CFR

...concentration reading controls the enriching system and activates...alarm and automatic shutdown...majority pair controls the enriching system and activates...alarm and automatic shutdown...concentration reading controls the diluting system and activates...alarm and automatic...

2014-07-01

339

Translation of dilution tolerance for gasoline SI engine  

E-print Network

There are a variety of fuel improvement strategies being developed for spark ignition engines which use dilution. Many of these technologies use a combination of different diluents. It is impractical in optimizing these ...

Niekamp, Troy S. (Troy Steven)

2013-01-01

340

Electrical resistivity imaging of conductive plume dilution in fractured rock  

Microsoft Academic Search

Electrical resistance tomography (ERT) was used to monitor a conductive plume dilution experiment that was conducted in fractured\\u000a basalt in order to assess its applications in this type of fractured-rock environment. Tap water was injected into an injection\\u000a well for 34 days to dilute a pre-existing potassium chloride (KCl) plume at a site in Idaho, USA. No further fluids were introduced

Robin E. Nimmer; James L. Osiensky; Andrew M. Binley; Kenneth F. Sprenke; Barbara C. Williams

2007-01-01

341

Stability Characteristics of Turbulent Hydrogen Dilute Diffusion Flames  

Microsoft Academic Search

Diffusion flame combustion of high-hydrogen fuels in land-based gas turbine combustors may include dilution of the fuel with inert gases and high velocity fuel injection to reduce NOx emissions. Stability regimes of such combustors are investigated in this study by examining turbulent dilute diffusion flames of hydrogen\\/nitrogen mixtures, issuing into a quiescent environment from a thin-lipped tube. This study has

Nathan T. Weiland; Peter A. Strakey

2009-01-01

342

Anatomy of symmetry energy of dilute nuclear matter  

E-print Network

The symmetry energy coefficients of dilute clusterized nuclear matter are evaluated in the $S$-matrix framework. Employing a few different definitions commonly used in the literature for uniform nuclear matter, it is seen that the different definitions lead to perceptibly different results for the symmetry coefficients for dilute nuclear matter. They are found to be higher compared to those obtained for uniform matter in the low density domain. The calculated results are in reasonable consonance with those extracted recently from experimental data.

J. N. De; S. K. Samaddar; B. K. Agrawal

2010-09-23

343

Anatomy of symmetry energy of dilute nuclear matter  

E-print Network

The symmetry energy coefficients of dilute clusterized nuclear matter are evaluated in the $S$-matrix framework. Employing a few different definitions commonly used in the literature for uniform nuclear matter, it is seen that the different definitions lead to perceptibly different results for the symmetry coefficients for dilute nuclear matter. They are found to be higher compared to those obtained for uniform matter in the low density domain. The calculated results are in reasonable consonance with those extracted recently from experimental data.

De, J N; Agrawal, B K

2010-01-01

344

Plankton dynamics due to rainfall, eutrophication, dilution, grazing and assimilation in an urbanized coastal lagoon  

NASA Astrophysics Data System (ADS)

After a prolonged summer dry period, the effects of a distinctive and continuing rainfall on the nutrients and plankton of an urban coastal lagoon were investigated over 2 months. The lagoon filled up over 5 weeks from <10% of its maximum volume until it broke open to the sea. Nutrients (ammonia and oxidised nitrogen) significantly increased the day after initial rainfall, before returning to pre-rainfall conditions within 5 days. Phytoplankton biomass grew 10 fold within a week after initial rainfall in the 25-30 °C water and declined to near initial levels 2 weeks later. The assemblage of phytoplankton and zooplankton changed dramatically after 1 day and again by 6 days later, gradually returning to the original community by 2 weeks after the initial rainfall. Zooplankton responded within a day with a two fold increase in the adult stages of the calanoid copepod Oithona sp., followed a week later by nauplii and adult Acartia bispinosa. The influx of adult Oithona indicates resting populations that were previously under sampled by our plankton net. The plankton community returned to the initial state by 2 weeks, to being dominated by a centric diatom and A. bispinosa after 5 weeks. Dilution of the lagoon reached a maximum of 0.25 d -1, while growth rates of the phytoplankton population reached a maximum of 1 d -1, and A. bispinosa nauplii growth of 2.5 d -1. Declines in chlorophyll biomass from the maximum 10 ?g l -1, at a rate of approximately 10% d -1 are consistent with the modelled uptake by zooplankton. The nutrients from runoff, growth and the influx of new zooplankton into the water column, resulted in a depleted ?13C and ?15N stable isotope signature of A. bispinosa by 2-4 ppt within 1-2 weeks, consistent with diatom growth and the terrestrial supply of depleted nutrients. ?34S of A. bispinosa was enriched by 2 ppt for 1-2 weeks after rainfall, but unlike C and N, returned to pre-rainfall levels by the end of the study period. We suggest that plankton studies in coastal lakes with variable water levels that are not tidally driven, should account for the influence of changes in water levels to help explain data variability.

Rissik, David; Shon, Edward Ho; Newell, Brooke; Baird, Mark E.; Suthers, Iain M.

2009-08-01

345

Dilute Oxygen Combustion Phase IV Final Report  

SciTech Connect

Novel furnace designs based on Dilute Oxygen Combustion (DOC) technology were developed under subcontract by Techint Technologies, Coraopolis, PA, to fully exploit the energy and environmental capabilities of DOC technology and to provide a competitive offering for new furnace construction opportunities. Capital cost, fuel, oxygen and utility costs, NOx emissions, oxide scaling performance, and maintenance requirements were compared for five DOC-based designs and three conventional air5-fired designs using a 10-year net present value calculation. A furnace direct completely with DOC burners offers low capital cost, low fuel rate, and minimal NOx emissions. However, these benefits do not offset the cost of oxygen and a full DOC-fired furnace is projected to cost $1.30 per ton more to operate than a conventional air-fired furnace. The incremental cost of the improved NOx performance is roughly $6/lb NOx, compared with an estimated $3/lb. NOx for equ8pping a conventional furnace with selective catalytic reduction (SCCR) technology. A furnace fired with DOC burners in the heating zone and ambient temperature (cold) air-fired burners in the soak zone offers low capital cost with less oxygen consumption. However, the improvement in fuel rate is not as great as the full DOC-fired design, and the DOC-cold soak design is also projected to cost $1.30 per ton more to operate than a conventional air-fired furnace. The NOx improvement with the DOC-cold soak design is also not as great as the full DOC fired design, and the incremental cost of the improved NOx performance is nearly $9/lb NOx. These results indicate that a DOC-based furnace design will not be generally competitive with conventional technology for new furnace construction under current market conditions. Fuel prices of $7/MMBtu or oxygen prices of $23/ton are needed to make the DOC furnace economics favorable. Niche applications may exist, particularly where access to capital is limited or floor space limitations are critical. DOC technology will continue to have a highly competitive role in retrofit applications requiring increases in furnace productivity.

Riley, M.F.

2003-04-30

346

The SPi chip as an integrated power management device for serial powering of future HEP experiments  

SciTech Connect

Serial powering is one viable and very efficient way to distribute power to future high energy physics (HEP) experiments. One promising way to realize serial powering is to have a power management device on the module level that provides the necessary voltage levels and features monitoring functionality. The SPi (Serial Powering Interface) chip is such a power manager and is designed to meet the requirements imposed by current SLHC upgrade plans. It incorporates a programmable shunt regulator, two linear regulators, current mode ADCs to monitor the current distribution on the module, over-current detection, and also provides module power-down capabilities. Compared to serially powered setups that use discrete components, the SPi offers a higher level of functionality in much less real estate and is designed to be radiation tolerant. Bump bonding techniques are used for chip on board assembly providing the most reliable connection at lowest impedance. This paper gives an overview of the SPi and outlines the main building blocks of the chip. First stand alone tests are presented showing that the chip is ready for operation in serially powered setups.

Trimpl, M.; Deptuch, G.; Gingu, C.; Yarema, R.; /Fermilab; Holt, R.; Weber, M.; /Rutherford; Kierstead, J.; Lynn, D.; /Brookhaven

2009-01-01

347

Serial correlation in neural spike trains: Experimental evidence, stochastic modeling, and single neuron variability  

NASA Astrophysics Data System (ADS)

The activity of spiking neurons is frequently described by renewal point process models that assume the statistical independence and identical distribution of the intervals between action potentials. However, the assumption of independent intervals must be questioned for many different types of neurons. We review experimental studies that reported the feature of a negative serial correlation of neighboring intervals, commonly observed in neurons in the sensory periphery as well as in central neurons, notably in the mammalian cortex. In our experiments we observed the same short-lived negative serial dependence of intervals in the spontaneous activity of mushroom body extrinsic neurons in the honeybee. To model serial interval correlations of arbitrary lags, we suggest a family of autoregressive point processes. Its marginal interval distribution is described by the generalized gamma model, which includes as special cases the log-normal and gamma distributions, which have been widely used to characterize regular spiking neurons. In numeric simulations we investigated how serial correlation affects the variance of the neural spike count. We show that the experimentally confirmed negative correlation reduces single-neuron variability, as quantified by the Fano factor, by up to 50%, which favors the transmission of a rate code. We argue that the feature of a negative serial correlation is likely to be common to the class of spike-frequency-adapting neurons and that it might have been largely overlooked in extracellular single-unit recordings due to spike sorting errors.

Farkhooi, Farzad; Strube-Bloss, Martin F.; Nawrot, Martin P.

2009-02-01

348

System and method for simultaneously collecting serial number information from numerous identity tags  

DOEpatents

A system and method for simultaneously collecting serial number information reports from numerous colliding coded-radio-frequency identity tags. Each tag has a unique multi-digit serial number that is stored in non-volatile RAM. A reader transmits an ASCII coded "D" character on a carrier of about 900 MHz and a power illumination field having a frequency of about 1.6 Ghz. A one MHz tone is modulated on the 1.6 Ghz carrier as a timing clock for a microprocessor in each of the identity tags. Over a thousand such tags may be in the vicinity and each is powered-up and clocked by the 1.6 Ghz power illumination field. Each identity tag looks for the "D" interrogator modulated on the 900 MHz carrier, and each uses a digit of its serial number to time a response. Clear responses received by the reader are repeated for verification. If no verification or a wrong number is received by any identity tag, it uses a second digital together with the first to time out a more extended period for response. Ultimately, the entire serial number will be used in the worst case collision environments; and since the serial numbers are defined as being unique, the final possibility will be successful because a clear time-slot channel will be available.

Doty, Michael A. (Manteca, CA)

1997-01-01

349

Erosive events in dilute pyroclastic density currents  

NASA Astrophysics Data System (ADS)

Our understanding of the dynamics of pyroclastic density currents (PDCs) is largely based on the study of their deposits. However, sedimentological structures reflect only the low energy, depositional phases of a flow. To enlarge the source of information on PDC behaviour, we provided wind-tunnel experiments to measure the minimal velocity necessary to erode dry, volcanic ash. Our results permit to link erosive surfaces that are often found in PDC deposits to the minimum velocity that must have acted to produce them. We apply the method to field examples and discuss the occurrence of hydraulic-jumps in dilute PDCs. We measured the threshold of surface friction-velocity for erosion of two types of volcanic ash: 1) a mixture of fragments of vesiculated scoria containing also lithics and crystals and 2) pumice clasts from the Plinian Laacher See eruption. Both were sampled in quarries from the East Eifel volcanic field (Germany). For each type, we measured the threshold for particles from 63 ?m to 2 mm in 1 phi-size steps. Static threshold friction-velocities have been measured experimentally in an open, 6 m-long wind-tunnel at Aarhus University. In order to quickly guarantee the downwind equilibrium-dynamics of the saltating sand-surface, we produced roughness-carpets upstream of the study area. The roughness-carpets consist of particles of the measured sample fixed onto the bed in order to create an appropriate static roughness. The measuring section (1 m in length) is located at the downwind end of the wind-tunnel and covered with 10 mm of sample. The wind velocity in the wind-tunnel was progressively increased until a small but continuous number of grains left the surface. This wind velocity was taken as the threshold, and the associated surface friction-velocity was deduced by calibration from wind-profiles data taken over the fixed surface of material of the same characteristics. We apply our results to sedimentary features found in natural deposits and usually interpreted as "chute and pool" structures. These are characterized by erosional events producing a steep side facing the flow, and lensoidal layers deposited on the stoss face of the un-eroded, remaining strata. Our experimental results allow for quantifying the minimum current-velocity required for the observed erosion. Based on this, we discuss the interpretation of such erosional features as "chute and pool" structures, which are the sedimentary record of hydraulic-jumps. There is no clear evidence of the presence of internal hydraulic-jumps in the sedimentary record of PDCs. Moreover, such flows can decelerate drastically and eventually stop without leaving the supercritical flow regime due to their highly depositional nature. Accordingly, they would not experience a hydraulic-jump.

Douillet, G.; Kueppers, U.; Rasmussen, K.; Merrison, J. P.; Dingwell, D. B.

2011-12-01

350

Modeling syngas-fired gas turbine engines with two dilutants  

NASA Astrophysics Data System (ADS)

Prior gas turbine engine modeling work at the University of Wyoming studied cycle performance and turbine design with air and CO2-diluted GTE cycles fired with methane and syngas fuels. Two of the cycles examined were unconventional and innovative. The work presented herein reexamines prior results and expands the modeling by including the impacts of turbine cooling and CO2 sequestration on GTE cycle performance. The simple, conventional regeneration and two alternative regeneration cycle configurations were examined. In contrast to air dilution, CO2 -diluted cycle efficiencies increased by approximately 1.0 percentage point for the three regeneration configurations examined, while the efficiency of the CO2-diluted simple cycle decreased by approximately 5.0 percentage points. For CO2-diluted cycles with a closed-exhaust recycling path, an optimum CO2-recycle pressure was determined for each configuration that was significantly lower than atmospheric pressure. Un-cooled alternative regeneration configurations with CO2 recycling achieved efficiencies near 50%, which was approximately 3.0 percentage points higher than the conventional regeneration cycle and simple cycle configurations that utilized CO2 recycling. Accounting for cooling of the first two turbine stages resulted in a 2--3 percentage point reduction in un-cooled efficiency, with air dilution corresponding to the upper extreme. Additionally, when the work required to sequester CO2 was accounted for, cooled cycle efficiency decreased by 4--6 percentage points, and was more negatively impacted when syngas fuels were used. Finally, turbine design models showed that turbine blades are shorter with CO2 dilution, resulting in fewer design restrictions.

Hawk, Mitchell E.

2011-12-01

351

An application of stereoscopy and image processing in forensics: recovering obliterated firearms serial number  

NASA Astrophysics Data System (ADS)

We present an application of the use of stereoscope to recovering obliterated firearms serial number. We investigate a promising new combined cheap method using both non-destructive and destructive techniques. With the use of a stereomicroscope coupled with a digital camera and a flexible cold light source, we can capture the image of the damaged area, and with continuous polishing and sometimes with the help of image processing techniques we could enhance the observed images and they can also be recorded as evidence. This method has already proven to be useful, in certain cases, in aluminum dotted pistol frames, whose serial number is printed with a laser, when etching techniques are not successful. We can also observe acid treated steel surfaces and enhance the images of recovered serial numbers, which sometimes lack of definition.

da Silva Nunes, L. C.; dos Santos, Paulo Acioly M.

2004-10-01

352

User's guide to the intelligent serial line card (ISL-11) for LSI-11 systems (Engineering Materials)  

SciTech Connect

The ISL-11 (Intelligent Serial Line) card is a quad height LSI-11 module with an on-board Intel 8039 microprocessor which supplies intelligence between a differential (RS-422) serial line and a DMA interface to the LSI-11. It is compatible with LSI-11's, LSI-11/2's, and LSI-11/23's. The fact that there is a microprocessor on-board allows the use of this module for many different applications. One application will involve networking of minicomputers using the in-house SCULL protocol. The entire SCULL protocol can be handled by the ISL-11 thus taking a significant load off the LSI-11 and simplifying the software interface to the link. The serial line is asynchronous and can be driven up to 38.4K band if the microcode can handle such speeds. A block diagram of the ISL-11 is shown on the next page.

Not Available

1983-01-01

353

A serial-kinematic nanopositioner for high-speed atomic force microscopy  

NASA Astrophysics Data System (ADS)

A flexure-guided serial-kinematic XYZ nanopositioner for high-speed Atomic Force Microscopy is presented in this paper. Two aspects influencing the performance of serial-kinematic nanopositioners are studied in this work. First, mass reduction by using tapered flexures is proposed to increased the natural frequency of the nanopositioner. 25% increase in the natural frequency is achieved due to reduced mass with tapered flexures. Second, a study of possible sensor positioning in a serial-kinematic nanopositioner is presented. An arrangement of sensors for exact estimation of cross-coupling is incorporated in the proposed design. A feedforward control strategy based on phaser approach is presented to mitigate the dynamics and nonlinearity in the system. Limitations in design approach and control strategy are discussed in the Conclusion.

Wadikhaye, Sachin P.; Yong, Yuen Kuan; Reza Moheimani, S. O.

2014-10-01

354

SSCC TD: A Serial and Simultaneous Configural-Cue Compound Stimuli Representation for Temporal Difference Learning  

PubMed Central

This paper presents a novel representational framework for the Temporal Difference (TD) model of learning, which allows the computation of configural stimuli – cumulative compounds of stimuli that generate perceptual emergents known as configural cues. This Simultaneous and Serial Configural-cue Compound Stimuli Temporal Difference model (SSCC TD) can model both simultaneous and serial stimulus compounds, as well as compounds including the experimental context. This modification significantly broadens the range of phenomena which the TD paradigm can explain, and allows it to predict phenomena which traditional TD solutions cannot, particularly effects that depend on compound stimuli functioning as a whole, such as pattern learning and serial structural discriminations, and context-related effects. PMID:25054799

Mondragón, Esther; Gray, Jonathan; Alonso, Eduardo; Bonardi, Charlotte; Jennings, Dómhnall J.

2014-01-01

355

The Cost and the Use of Serials in Italian Astronomical Libraries  

NASA Astrophysics Data System (ADS)

We present the results of a two year study on the nature, cost and use of periodicals in Italian Astronomical Libraries (IALs). In the year 2000, IALs spent two-thirds of the budget (˜440.000 Euros) for serial subscriptions. This fact provided an incentive for the 12 Observatory librarians to investigate the potential for developing a consortium. In so doing, we first analysed characteristics of our individual collections and then evaluated the cost of on-line access as opposed to paper subscriptions. Then we studied the relationship between cost and serial usage.

Brunetti, Francesca; Marra, Monica; Olostro Cirella, Emilia; Schiavone, Luisa

356

Encoding serial data for energy-delay-product and energy minimization  

E-print Network

in this thesis, and hence these methods are not able to achieve large energy or EDP savings. The proposed MCA scheme uses a widely exploited property of digital images, that is, their inter-pixel correlations. Pixel differences are encoded rather than the pixel... utilize a serial bus, and hence are a natural application for energy sav- ing techniques used for serial links. A key property of digital images (their inter-pixel correlations) is exploited in this work. The difference between adjacent pixels in an image...

Ekambavanan, Sasidharan

2009-05-15

357

A serial digital data communications device. [for real time flight simulation  

NASA Technical Reports Server (NTRS)

A general purpose computer peripheral device which is used to provide a full-duplex, serial, digital data transmission link between a Xerox Sigma computer and a wide variety of external equipment, including computers, terminals, and special purpose devices is reported. The interface has an extensive set of user defined options to assist the user in establishing the necessary data links. This report describes those options and other features of the serial communications interface and its performance by discussing its application to a particular problem.

Fetter, J. L.

1977-01-01

358

Dilution of protein-surfactant complexes: A fluorescence study  

PubMed Central

Dilution of protein–surfactant complexes is an integrated step in microfluidic protein sizing, where the contribution of free micelles to the overall fluorescence is reduced by dilution. This process can be further improved by establishing an optimum surfactant concentration and quantifying the amount of protein based on the fluorescence intensity. To this end, we study the interaction of proteins with anionic sodium dodecyl sulfate (SDS) and cationic hexadecyl trimethyl ammonium bromide (CTAB) using a hydrophobic fluorescent dye (sypro orange). We analyze these interactions fluourometrically with bovine serum albumin, carbonic anhydrase, and beta-galactosidase as model proteins. The fluorescent signature of protein–surfactant complexes at various dilution points shows three distinct regions, surfactant dominant, breakdown, and protein dominant region. Based on the dilution behavior of protein–surfactant complexes, we propose a fluorescence model to explain the contribution of free and bound micelles to the overall fluorescence. Our results show that protein peak is observed at 3 mM SDS as the optimum dilution concentration. Furthermore, we study the effect of protein concentration on fluorescence intensity. In a single protein model with a constant dye quantum yield, the peak height increases with protein concentration. Finally, addition of CTAB to the protein–SDS complex at mole fractions above 0.1 shifts the protein peak from 3 mM to 4 mM SDS. The knowledge of protein–surfactant interactions obtained from these studies provides significant insights for novel detection and quantification techniques in microfluidics. PMID:23868358

Azadi, Glareh; Chauhan, Anuj; Tripathi, Anubhav

2013-01-01

359

Dilution of protein-surfactant complexes: a fluorescence study.  

PubMed

Dilution of protein-surfactant complexes is an integrated step in microfluidic protein sizing, where the contribution of free micelles to the overall fluorescence is reduced by dilution. This process can be further improved by establishing an optimum surfactant concentration and quantifying the amount of protein based on the fluorescence intensity. To this end, we study the interaction of proteins with anionic sodium dodecyl sulfate (SDS) and cationic hexadecyl trimethyl ammonium bromide (CTAB) using a hydrophobic fluorescent dye (sypro orange). We analyze these interactions fluourometrically with bovine serum albumin, carbonic anhydrase, and beta-galactosidase as model proteins. The fluorescent signature of protein-surfactant complexes at various dilution points shows three distinct regions, surfactant dominant, breakdown, and protein dominant region. Based on the dilution behavior of protein-surfactant complexes, we propose a fluorescence model to explain the contribution of free and bound micelles to the overall fluorescence. Our results show that protein peak is observed at 3 mM SDS as the optimum dilution concentration. Furthermore, we study the effect of protein concentration on fluorescence intensity. In a single protein model with a constant dye quantum yield, the peak height increases with protein concentration. Finally, addition of CTAB to the protein-SDS complex at mole fractions above 0.1 shifts the protein peak from 3 mM to 4 mM SDS. The knowledge of protein-surfactant interactions obtained from these studies provides significant insights for novel detection and quantification techniques in microfluidics. PMID:23868358

Azadi, Glareh; Chauhan, Anuj; Tripathi, Anubhav

2013-09-01

360

Evaluation of heavy water for indicator dilution cardiac output measurement  

SciTech Connect

We evaluated deuterium oxide (D2O) as a tracer for cardiac output measurements. Cardiac output measurements made by thermodilution were compared with those made by indicator dilution with D2O and indocyanine green as tracers. Five triplicate measurements for each method were made at intervals of 30 minutes in each of 9 anesthetized, mechanically ventilated goats. Cardiac output ranged between 0.68 and 3.79 L/min. The 45 data points yielded a correlation coefficient of 0.948 for the comparison of D2O indicator dilution cardiac output measurements with thermodilution measurements and a linear regression slope of 1.046. D2O indicator dilution measurements were biased by -0.11 +/- 0.22 L/min compared with thermodilution measurements and had a standard deviation of +/- 0.12 L/min for triplicate measurements. Hematocrits ranging between 20 and 50 vol% had no effect on optical density for D2O. D2O is more stable than indocyanine green and approximately one-tenth the price (40 cents per injection compared with $4). The basic instrumentation cost of approximately $9,000 is an additional initial expense, but provides the ability to perform pulmonary extravascular water measurements with a double-indicator dilution technique. D2O has potential as a tracer for the clinical determination of indicator dilution cardiac output measurements and pulmonary extravascular water measurements.

Schreiner, M.S.; Leksell, L.G.; Neufeld, G.R. (Univ. of Pennsylvania School of Medicine, Philadelphia (USA))

1989-10-01

361

Mobile Melt-Dilute Treatment for Russian Spent Nuclear Fuel  

SciTech Connect

Treatment of spent Russian fuel using a Melt-Dilute (MD) process is proposed to consolidate fuel assemblies into a form that is proliferation resistant and provides critically safety under storage and disposal configurations. Russian fuel elements contain a variety of fuel meat and cladding materials. The Melt-Dilute treatment process was initially developed for aluminum-based fuels so additional development is needed for several cladding and fuel meat combinations in the Russian fuel inventory (e.g. zirconium-clad, uranium-zirconium alloy fuel). A Mobile Melt-Dilute facility (MMD) is being proposed for treatment of spent fuels at reactor site storage locations in Russia; thereby, avoiding the costs of building separate treatment facilities at each site and avoiding shipment of enriched fuel assemblies over the road. The MMD facility concept is based on laboratory tests conducted at the Savannah River Technology Center (SRTC), and modular pilot-scale facilities constructed at the Savannah River Site for treatment of US spent fuel. SRTC laboratory tests have shown the feasibility of operating a Melt-Dilute treatment process with either a closed system or a filtered off-gas system. The proposed Mobile Melt-Dilute process is presented in this paper.

Peacock, H.

2002-09-17

362

Maximum First Transfer and Dilution Volumes for 241SY101  

SciTech Connect

This report discusses the solution to the following problem: what is the maximum waste transfer and dilution quantities and locations which can be allowed in the first transfer of waste from SY-101 given the following constraints? (1) The crust must float on the submerged waste (waste becomes less dense when diluted, eventually allowing crust to sink); (2) No credit is taken for the top dilution; (3) Addition of water to the bulk slurry through the transfer pump must be able to refloat the crust base to above 295 inches; (4) The margin between refloating to 295 inches and crust sinking must be at least 10,000 gallons; (5) The crust can't be thinned to less than 60 inches thick.

BARTON, W.B.

1999-10-28

363

Application of Cryocoolers to a Vintage Dilution Refrigerator  

SciTech Connect

A dilution refrigerator is required for 50mK detector operation of CDMS (Cryogenic Dark Matter Search). Besides shielding the dilution refrigerator itself, the liquid nitrogen shield and liquid helium bath in the refrigerator cool the detector cryostat heat shields and cool electronics, resulting in significant external heat loads at 80K and at 4K. An Oxford Instruments Kelvinox 400 has served this role for ten years but required daily transfers of liquid nitrogen and liquid helium. Complicating the cryogen supply is the location 800 meters below ground in an RF shielded, class 10000 clean room at Soudan, MN. Nitrogen and helium re-liquefiers using cryocoolers were installed outside the clean room and continuously condense room temperature gas and return the liquids to the dilution refrigerator through a transfer line. This paper will describe the design, installation, controls and performance of liquefaction systems.

Schmitt, Richard; Smith, Gary; Ruschman, Mark; /Fermilab; Beaty, Jim; /Minnesota U.

2011-06-06

364

Image characteristics in applications utilizing dilute subaperture arrays  

NASA Astrophysics Data System (ADS)

When a large aperture is synthesized with an array of smaller subapertures for high-resolution imaging applications, it is important not only to arrange the subapertures to achieve minimal spatial frequency redundancy but also to choose the size of the subapertures (i.e., the dilution ratio) necessary to achieve the best possible image quality. Spurious or ghost images often occur even for nonredundant dilute subaperture arrays. We show that array configurations producing a uniform modulation transfer function will not exhibit these undesirable ghost images. A prescription that is unique and original (to the best of our knowledge) is then presented for constructing both one-dimensional and two-dimensional configurations of dilute subaperture arrays that results in a uniform spatial frequency response with an arbitrarily high spatial resolution for reciprocal path-imaging applications.

Harvey, James E.; Kotha, Anita; Phillips, Ronald L.

1995-06-01

365

Gas dilution system results and application to acid rain utilities  

SciTech Connect

In 1997, the United States EPA will remove restrictions preventing acid rain utilities from using gas dilution systems for calibration or linearity studies for continuous emissions monitoring, Test Method 205 in 40CFR51 requires that a gas dilution system must produce calibration gases whose measured values are within {+-}2% of predicted values. This paper presents the evaluation of the Environics/CalMat 2020 Dilution System for use in calibration studies. Internal studies show that concentrations generated by this unit are within {+-}0.5% of predicted values. Studies are being conducted by several acid rain utilities to evaluate the Environics/CalMat system using single minor component calibration standards. In addition, an internally generated study is being performed to demonstrate the system`s accuracy using a multi-component gas mixture. Data from these tests will be presented in the final version of the paper.

Jolley-Souders, K.; Geib, R. [Matheson Gas Products, Montgomeryville, PA (United States); Dunn, C. [Environics, Inc., Tolland, CT (United States)

1997-12-31

366

Characterization of an anaerobic baffled reactor treating dilute aircraft de-icing fluid and long term effects of operation on granular biomass.  

PubMed

Successful treatment of dilute ethylene glycol based-aircraft de-icing fluid (ADF) was achieved using a four compartment, anaerobic baffled reactor (ABR). Three ADF concentrations (0.04, 0.07, and 0.13%v/v) were continuously fed at different hydrological retention times (HRTs; 24, 12, 6 and 3h) with concomitant organic loading rates (OLRs) varying between 0.3 and 6 kg chemical oxygen demand (COD)/m(3)/d. ABR achieved over 75% soluble COD removal and an average methane production potential of 0.30+/-0.05LCH(4)/gCOD(removed) at 33 degrees C for the experimental conditions evaluated. The different experimental conditions tested and a four-month summer shut-down simulation had no significant effect on reactor performance or on the settling characteristics of the granular biomass, which remained almost constant during the study. Biomass specific acetoclastic activity however, changed through the study; increasing two fold for the last three compartments and decreasing almost the same magnitude for the first compartment compared to inoculum, suggesting that a new distribution of microbial consortia was established in each compartment of the reactor by the end of the study. PMID:20005091

Marin, Juan; Kennedy, Kevin J; Eskicioglu, Cigdem

2010-04-01

367

Examples of Holdings Reports and Decisions Using the American National Standard for Serial Holdings Statements at the Summary Level.  

ERIC Educational Resources Information Center

This paper describes some of the problems encountered and the resolutions reached in converting Indiana University Libraries serials holdings information to the format specified in the 1980 American National Standard for Serial Holdings Statements at the Summary Level (ANSI). It is noted that this project was part of the development--by OCLC--of…

Charbonneau, Gary; And Others

368

Comparative study of the FireWire™ IEEE1394 protocol with the Universal Serial Bus and Ethernet  

Microsoft Academic Search

This paper presents results of study of the IEEE 1394 protocol, which is the IEEE standard for a high performance serial bus with similar, and more widely used technologies like the Universal Serial Bus 1.0 and the Ethernet Protocol. A thorough theoretical and experimental investigation between the technologies is made with respect to the actual architecture of the buses and

G. Ramamurthy; K. Ashenayi

2002-01-01

369

Parkour: Parallel Speedup Estimates for Serial Programs Donghwan Jeon, Saturnino Garcia, Chris Louie, and Michael Bedford Taylor  

E-print Network

to three benchmarks from the NAS Parallel benchmark suite run- ning on a 32-core AMD multicore systemParkour: Parallel Speedup Estimates for Serial Programs Donghwan Jeon, Saturnino Garcia, Chris, a tool that creates parallel speedup estimates for unparallelized serial programs. Unlike previous

Fainman, Yeshaiahu

370

Disentangling Stability, Variability and Adaptability in Human Performance: Focus on the Interplay between Local Variance and Serial Correlation  

ERIC Educational Resources Information Center

We address the complex relationship between the stability, variability, and adaptability of psychological systems by decomposing the global variance of serial performance into two independent parts: the local variance (LV) and the serial correlation structure. For two time series with equal LV, the presence of persistent long-range correlations…

Torre, Kjerstin; Balasubramaniam, Ramesh

2011-01-01

371

Transfer in SLA and Creoles: The Implications of Causative Serial Verbs in the Interlanguage of Vietnamese ESL Learners  

ERIC Educational Resources Information Center

This paper presents a study that attributes verb serialization in the interlanguage of Vietnamese-speaking ESL learners to language transfer and, furthermore, puts forward the view that such transfer bears a resemblance to substrate influence in creoles with serial verb constructions (SVCs). In a task that elicited English causatives through…

Helms-Park, Rena

2003-01-01

372

Evaluation of two gas-dilution methods for instrument calibration  

NASA Technical Reports Server (NTRS)

Two gas dilution methods were evaluated for use in the calibration of analytical instruments used in air pollution studies. A dual isotope fluorescence carbon monoxide analyzer was used as the transfer standard. The methods are not new but some modifications are described. The rotary injection gas dilution method was found to be more accurate than the closed loop method. Results by the two methods differed by 5 percent. This could not be accounted for by the random errors in the measurements. The methods avoid the problems associated with pressurized cylinders. Both methods have merit and have found a place in instrument calibration work.

Evans, A., Jr.

1977-01-01

373

Solvable RSOS models based on the dilute BWM algebra  

NASA Astrophysics Data System (ADS)

In this paper we present representations of the recently introduced dilute Birman-Wenzl-Murakami algebra. These representations, labelled by the level-l Bn(1), Cn(1) and Dn(1) affine Lie algebras, are baxterized to yield solutions to the Yang-Baxter equation. The thus obtained critical solvable models are RSOS counterparts of the, respectively, Dn+1(2), A2n(2) and Bn(1)R-matrices of Bazhanov and Jimbo. For the Dn+1(2) and Bn(1) algebras the RSOS models are new. An elliptic extension which solves the Yang-Baxter equation is given for all three series of dilute RSOS models.

Grimm, Uwe; Warnaar, S. Ole

1995-02-01

374

Two-stage dilute-acid pretreatment of softwoods  

Microsoft Academic Search

Whole treechips obtained from softwood forest thinnings were pretreated via single-and two-stage dilute-sulfuric acid pretreatment.\\u000a Whole-tree chips were impregnated with dilute sulfuric acid and steam treated in a 4-L steam explosion reactor. In single-stage\\u000a pretreatment, wood chips were treated using a wide range of severity. In two-stage pretreatment, the first stage was carried\\u000a out at low severity tomaximize hemicellulose recovery.

Quang A. Nguyen; Melvin P. Tucker; Fred A. Keller; Fannie P. Eddy

2000-01-01

375

Random-field effect in diluted Ising antiferromagnets  

NASA Astrophysics Data System (ADS)

It is argued that near the percolation threshold of diluted systems there should be an instability of the long-range order in spatially random fields much smaller than the local molecular fields as a result of the strong ramification of the infinite percolation cluster, in all dimensions. This may give a possible explanation for the experiments of Yoshizawa et al., who find a destruction of the long-range order due to relatively small external magnetic fields in diluted two- and three-dimensional Ising antiferromagnets.

Fähnle, M.

1983-05-01

376

Transport theory for a dilute Bose-Einstein condensate  

NASA Astrophysics Data System (ADS)

We obtain microscopic expressions for the six hydrodynamic modes of a dilute Bose-Einstein condensate: two transverse (shear) modes and four longitudinal modes corresponding to the first sound (elastic waves) and second sound (temperature waves). Our microscopic expressions include both the speed of the two types of sound and the rate of relaxation of the sound waves. We obtain numerical values for the shear viscosity of a dilute BEC composed of bosons which interact via a contact potential. Our values for the shear viscosity are obtained using the eigenvalues and eigenvectors of the three types of collision operators that govern the relaxation of the condensate.

Reichl, L. E.; Gust, Erich D.

2013-11-01

377

Group Discussion as Interactive Dialogue or as Serial Monologue: The Influence of Group Size  

Microsoft Academic Search

Current models draw a broad distinction between com- munication as dialogue and communication as monologue. The two kinds of models have different implications for who influences whom in a group discussion. If the discussion is like interactive dialogue, group members should be influenced most by those with whom they interact in the discussion; if it is like serial monologue, they

Nicolas Fay; Simon Garrod; Jean Carletta

2000-01-01

378

Serial Proton MR Spectroscopic Imaging of Recurrent Malignant Gliomas after Gamma Knife Radiosurgery  

Microsoft Academic Search

BACKGROUND AND PURPOSE: The diagnosis of brain tumors after high-dose radiation therapy is frequently limited by the lack of metabolic discrimination available with conven- tional imaging methods. The purpose of this study was to use proton MR spectroscopy to investigate serial changes in recurrent malignant gliomas after gamma knife radiosurgery to characterize tissue response to high-dose radiation. METHODS: Eighteen patients

Edward E. Graves; Sarah J. Nelson; Daniel B. Vigneron; Lynn Verhey; Michael McDermott; David Larson; Susan Chang; Michael D. Prados; William P. Dillon

379

Endoscopic Laser Surgery versus Serial Amnioreduction for Severe Twin-to-Twin Transfusion Syndrome  

Microsoft Academic Search

background Monochorionic twin pregnancies complicated by severe twin-to-twin transfusion syn- drome at midgestation can be treated by either serial amnioreduction (removal of large volumes of amniotic fluid) or selective fetoscopic laser coagulation of the communicat- ing vessels on the chorionic plate. We conducted a randomized trial to compare the effi- cacy and safety of these two treatments. methods Pregnant women

Marie-Victoire Senat; Jan Deprest; Michel Boulvain; Alain Paupe; Norbert Winer; Yves Ville

2004-01-01

380

Evidence for a Specific Impairment of Serial Order Short-Term Memory in Dyslexic Children  

ERIC Educational Resources Information Center

In order to better understand the nature of verbal short-term memory (STM) deficits in dyslexic children, the present study used the distinction between item and serial order retention capacities in STM tasks. According to recent STM models, storage of verbal item information depends very directly upon the richness of underlying phonological and…

Perez, Trecy Martinez; Majerus, Steve; Mahot, Aline; Poncelet, Martine

2012-01-01

381

Cross-Linguistic Differences in the Immediate Serial Recall of Consonants versus Vowels  

ERIC Educational Resources Information Center

The current study investigated native English and native Arabic speakers' phonological short-term memory for sequences of consonants and vowels. Phonological short-term memory was assessed in immediate serial recall tasks conducted in Arabic and English for both groups. Participants (n = 39) heard series of six consonant-vowel syllables and wrote…

Kissling, Elizabeth M.

2012-01-01

382

Task Based Optimal Geometric Design and Positioning of Serial Robotic Manipulators  

Microsoft Academic Search

This paper devises a multi-objective cost function which elaborates different constraints as well as an optimality criterion for design of serial robotic manipulators. In practice, inclusion of different constraints drastically limits the possible range of design parameters. The result of minimizing this multi-objective cost function is compared with another method which locates an optimal solution using a graphical representation. The

S. Barissi; H. D. Taghirad

2008-01-01

383

AN OPTIMIZATION PROBLEM APPROACH FOR DESIGNING BOTH SERIAL AND PARALLEL MANIPULATORS  

Microsoft Academic Search

Serial and parallel manipulators can be used in different manipulative tasks when their peculiarities in Kinematics and Dynamics behavior is properly considered since the design stage. The basic performances in Workspace, mobility constraints, and stiffness make them alternative solutions and not competiting manipulator chains. Thus, it is convenient to deduce a common design procedure that consider common design criteria, bur

Marco Ceccarelli; Giuseppe Carbone; Erika Ottaviano

384

The Serial Solution of the Diffusion Equation Using Nonstandard Hybrid Techniques  

Microsoft Academic Search

In the conventional approach to the serial solution of the one-dimension diffusion equation using continuous space-discrete time (CSDT) techniques, there is a large amount of positive feedback in the resultant analog programming. For all practical purposes, the presence of this positive feedback makes the conventional analog method useless.

Shu-Kwan Chan

1969-01-01

385

The replacement of machines in a serially dependent multi-machine production system  

Microsoft Academic Search

In this paper a heuristic procedure is developed for solving the problem of planning machine replacements for a serially dependent production system. Given a finite planning horizon, the decision-maker wishes to decide (1) which periods, if any, that the entire production system must be shut down in order to make replacements, and (2) what specific machine or machines in the

JOEL P. STINSON; BASHEER M. KHUMAWALA

1987-01-01

386

Lightweight Multitasking Support for Embedded Systems using the Phantom Serializing Compiler  

Microsoft Academic Search

Embedded software continues to play an ever increasing role in the design of complex embedded applications. In part, the elevated level of abstraction provided by a high-level programming paradigm immensely facilitates a short design cycle, fewer errors, portability, and reuse. Serializing compilers have been proposed as an alternative to traditional OS techniques, enabling a designer to develop multitasking applications without

Andre C. Nacul; Tony Givargis

2005-01-01

387

Developing creativity in tourist experiences: A solution to the serial reproduction of culture?  

Microsoft Academic Search

As culture is increasingly utilised as a means of social and economic development, the cultural tourism market is being flooded with new attractions, cultural routes and heritage centres. However, many consumers, tired of encountering the serial reproduction of culture in different destinations are searching for alternatives. The rise of skilled consumption, the importance of identity formation and the acquisition of

Greg Richards; Julie Wilson

2006-01-01

388

A new and efficient algorithm for the inverse kinematics of a general serial 6 R manipulator  

Microsoft Academic Search

In this paper a new and very efficient algorithm to compute the inverse kinematics of a general 6R serial kinematic chain is presented. The main idea is to make use of classical multidimensional geometry to structure the problem and to use the geometric information before starting the elimination process. For the geometric pre-processing we utilize the Study model of Euclidean

Manfred L. Husty; Martin Pfurner; Hans-Peter Schröcker

2007-01-01

389

A Digital Clock Re-Timing Circuit for On-Chip Source-Synchronous Serial Links  

E-print Network

A Digital Clock Re-Timing Circuit for On-Chip Source-Synchronous Serial Links Muhammad E. S. This digital makes its area much smaller than conventional problem can be circumvented using edge detection are being assembled from pre-designed blocks (i.e. IPs), usually Fully digital or semi-digital solutions

Elrabaa, Muhammad E. S.

390

Analysis, Design and Iterative Decoding of Double Serially Concatenated Codes with Interleavers  

NASA Technical Reports Server (NTRS)

A double serially concatenated code with two interleavers consists of the cascade of an outer encoder, an interleaver permuting the outer codeword bits, a middle encoder, another interleaver permuting the middle codeword bits and an inner encoder whose input words are the permuted middle codewords.

Benedetto, S.; Divsalar, D.; Montorsi, G.; Pollara, F.

1998-01-01

391

Haptic Rendering of Topological Constraints to Users Manipulating Serial Virtual Linkages  

Microsoft Academic Search

This paper presents an approach for haptic rendering of topological constraints to users operating serial virtual linkages. In the proposed approach, a haptic device controller is designed to penalize users' departure from the configuration manifold of the virtual linkage. This manifold is locally approximated through the range space of the Jacobian of the virtual linkage computed at the user's hand.

Daniela Constantinescu; Septimiu E. Salcudean; Elizabeth A. Croft

2005-01-01

392

Serial Computations of Levenshtein In the previous chapters, we discussed problems involving an exact match  

E-print Network

4 Serial Computations of Levenshtein Distances In the previous chapters, we discussed problems commonsubsequence, which is expressively equivalent to the simple form of the Levenshtein distance. 4.1 Levenshtein distance and the LCS problem The Levenshtein distance is a metric that measures the similarity of two

Hirschberg, Dan

393

NON-LINEAR REGISTRATION OF SERIAL HISTOLOGICAL IMAGES OF THE MIDDLE EAR Shruti Nambiar1  

E-print Network

NON-LINEAR REGISTRATION OF SERIAL HISTOLOGICAL IMAGES OF THE MIDDLE EAR Shruti Nambiar1 , M. Mallar components of the joint cartilage. Histological images offer much better image contrast and resolution. For example, the histological image of a middle-ear joint shown in Fig. 2 clearly shows details

Funnell, W. Robert J.

394

Success is good but failure is not so bad either: serial entrepreneurs and venture capital contracting*  

E-print Network

Success is good but failure is not so bad either: serial entrepreneurs and venture capital entrepreneurial experience ­ of financial contracting in U.S. based startups backed by venture capitalists (VCs with thriving entrepreneurship in the United States. JEL Classification Code: G24 Keywords: Venture Capital

Lin, Xiaodong

395

Component Processes in Reading: Shared and Unique Variance in Serial and Isolated Naming Speed  

ERIC Educational Resources Information Center

Reading ability is comprised of several component processes. In particular, the connection between the visual and verbal systems has been demonstrated to play an important role in the reading process. The present study provides a review of the existing literature on the visual verbal connection as measured by two tasks, rapid serial naming and…

Logan, Jessica A. R.; Schatschneider, Christopher

2014-01-01

396

Rapid Serial Naming and Reading Ability: The Role of Lexical Access  

ERIC Educational Resources Information Center

Rapid serial naming tasks are frequently used to explain variance in reading skill. However, the construct being measured by rapid naming is yet undetermined. The Phonological Processing theory suggests that rapid naming relates to reading because of similar demands of access to long-term stored phonological representations of visual stimuli. Some…

Logan, Jessica A. R.; Schatschneider, Christopher; Wagner, Richard K.

2011-01-01

397

The Roles of Outcome and Position Associations in Animal Serial Learning  

ERIC Educational Resources Information Center

Evidence that outcome associations, position associations, and response patterns each contribute to performance in animal serial learning came from two experiments in which three-trial series of rewarded and not-rewarded trials were examined. Response patterns were disrupted in Experiment 1 by placing animals directly in the goal on selected…

Burns, Richard A.; Racey, Deborah E.; Ratliff, Chasity L.

2008-01-01

398

Priming from Distractors in Rapid Serial Visual Presentation Is Modulated by Image Properties and Attention  

ERIC Educational Resources Information Center

We investigated distractor processing in a dual-target rapid serial visual presentation (RSVP) task containing familiar objects, by measuring repetition priming from a priming distractor (PD) to Target 2 (T2). Priming from a visually identical PD was contrasted with priming from a PD in a different orientation from T2. We also tested the effect of…

Harris, Irina M.; Benito, Claire T.; Dux, Paul E.

2010-01-01

399

Substantia nigra pars reticulata neurons code initiation of a serial pattern: implications for natural action sequences  

E-print Network

activity, obsessive±compulsive disorder, Parkinson's disease, rat, serial order, syntax, Tourette ganglia dysfunction, such as Parkinson's disease or Tourette's syndrome. The substantia nigra pars and Tourette's syndrome (Rapoport & Wise, 1988; Toates, 1990), which can sometimes involve speech sequences too

Berridge, Kent

400

Large-Scale Serial Analysis of Gene Expression Reveals Genes Differentially Expressed in Ovarian Cancer1  

Microsoft Academic Search

Difficulties in the detection, diagnosis, and treatment of ovarian cancer result in an overall low survival rate of women with this disease. A better understanding of the pathways involved in ovarian tumorigenesis will likely provide new targets for early and effective intervention. Here, we have used serial analysis of gene expression (SAGE) to generate global gene expression profiles from various

Colleen D. Hough; Cheryl A. Sherman-Baust; Ellen S. Pizer; F. J. Montz; Dwight D. Im; Neil B. Rosenshein; Kathleen R. Cho; Gregory J. Riggins; Patrice J. Morin

2000-01-01

401

A SAGE (Serial Analysis of Gene Expression) View of Breast Tumor Progression1  

Microsoft Academic Search

To identify molecular alterations involved in the initiation and progres- sion of breast carcinomas, we analyzed the global gene expression profiles of normal mammary epithelial cells and in situ, invasive, and metastatic breast carcinomas using serial analysis of gene expression (SAGE). We identified sets of genes expressed only or most abundantly in a specific stage of breast tumorigenesis or in

Dale A. Porter; Ian E. Krop; Selim Nasser; Dennis Sgroi; Carolyn M. Kaelin; Jeffrey R. Marks; Gregory Riggins; Kornelia Polyak

2001-01-01

402

9 CFR 113.8 - In vitro tests for serial release.  

Code of Federal Regulations, 2010 CFR

...300; (2) Testing the Master Seed...acceptable to the Animal and Plant Health...potency either by testing a Qualifying Serial in host animals or by providing...results of the testing shall be evaluated...Stage Number of animals Failures...

2010-01-01

403

Short-Term Memory for Serial Order: A Recurrent Neural Network Model  

ERIC Educational Resources Information Center

Despite a century of research, the mechanisms underlying short-term or working memory for serial order remain uncertain. Recent theoretical models have converged on a particular account, based on transient associations between independent item and context representations. In the present article, the authors present an alternative model, according…

Botvinick, Matthew M.; Plaut, David C.

2006-01-01

404

21st Century Shell Game: Cutting Serials in the Electronic Age  

ERIC Educational Resources Information Center

The advent of online journals, bundled packages, and consortial "big deals" means that librarians have to work harder than ever when budget shortfalls require cutting serials. This article recounts the experience of the Houston Academy of Medicine-Texas Medical Center Library in its journal cancellation project of 2002.

Jasper, Richard P.

2005-01-01

405

Category Induction via Distributional Analysis: Evidence from a Serial Reaction Time Task  

ERIC Educational Resources Information Center

Category formation lies at the heart of a number of higher-order behaviors, including language. We assessed the ability of human adults to learn, from distributional information alone, categories embedded in a sequence of input stimuli using a serial reaction time task. Artificial grammars generated corpora of input strings containing a…

Hunt, Ruskin H.; Aslin, Richard N.

2010-01-01

406

Serial Choice Reaction-time as a Function of Response versus Signal-and-Response Repetition  

Microsoft Academic Search

IN serial self-paced choice reaction, reaction times (RTs) to repeated signals, that is, to a signal identical to the immediately preceding one, are shorter than RTs to new signals, that is, to a signal different from the preceding one, provided the time-lag separating the onset of each signal from the end of the previous response is short. This was shown

Paul Bertelson

1965-01-01

407

Sipping Coffee with a Serial Killer: On Conducting Life History Interviews with a Criminal Genius  

ERIC Educational Resources Information Center

As part of my Ph.D. research on criminal genius, I conducted 44 semi-structured interviews. One of the 44 subjects, in particular, stood out. This noteworthy individual claimed that he had killed 15 people. His story was particularly interesting because--unlike most social research involving serial killers--he claimed that he had never been…

Oleson, J. C.

2004-01-01

408

High-Speed, Multi-Channel Serial ADC LVDS Interface for Xilinx Virtex-5 FPGA  

NASA Technical Reports Server (NTRS)

Analog-to-digital converters (ADCs) are used in scientific and communications instruments on all spacecraft. As data rates get higher, and as the transition is made from parallel ADC designs to high-speed, serial, low-voltage differential signaling (LVDS) designs, the need will arise to interface these in field programmable gate arrays (FPGAs). As Xilinx has released the radiation-hardened version of the Virtex-5, this will likely be used in future missions. High-speed serial ADCs send data at very high rates. A de-serializer instantiated in the fabric of the FPGA could not keep up with these high data rates. The Virtex-5 contains primitives designed specifically for high-speed, source-synchronous de-serialization, but as supported by Xilinx, can only support bitwidths of 10. Supporting bit-widths of 12 or more requires the use of the primitives in an undocumented configuration, a non-trivial task. A new SystemVerilog design was written that is simpler and uses fewer hardware resources than the reference design described in Xilinx Application Note XAPP866. It has been shown to work in a Xilinx XC5VSX24OT connected to a MAXIM MAX1438 12-bit ADC using a 50-MHz sample clock. The design can be replicated in the FPGA for multiple ADCs (four instantiations were used for a total of 28 channels).

Taylor, Gregory H.

2012-01-01

409

Parafoveal perception during sentence reading? An ERP paradigm using rapid serial visual presentation (RSVP)  

E-print Network

reading, which we tested in two groups of participants reading sentences with opposite reading directions an increasingly popular tool in the study of language comprehension in general and in reading in particular (forParafoveal perception during sentence reading? An ERP paradigm using rapid serial visual

Kutas, Marta

410

South African serial rapists: the offenders, their victims, and their offenses.  

PubMed

Serial rapists have the propensity to cause harm to a significant number of victims, meaning that they are of concern to the police as well as to treatment providers. Despite the serious nature of their offending, there are surprisingly few studies that provide information regarding their characteristics, the types of victim they target, or the nature of the sexual offenses they commit, and those studies that do exist are varied in their findings. This study provides a descriptive analysis of serial rape in South Africa. One hundred and nineteen sexual offenses committed by 22 serial rapists were sampled. Information regarding the victims, the offenders, and the crimes they had committed were extracted from police files. The characteristics of victims and offenders are reported as well as the frequencies for 114 different crime scene behaviors. When compared with samples of serial sex offenders from other countries, differences emerged in victim characteristics and crime scene behaviors, including how the victims were targeted, the sexual behaviors engaged in, and the incidence of physical violence. The implications of these observed differences for practice are discussed. PMID:22434346

Woodhams, Jessica; Labuschagne, Gérard

2012-12-01

411

Kismet: Parallel Speedup Estimates for Serial Programs Donghwan Jeon Saturnino Garcia Chris Louie Michael Bedford Taylor  

E-print Network

Kismet to eight high-parallelism NAS Parallel Benchmarks running on a 32-core AMD mul- ticore system, five low-parallelism SpecInt benchmarks, and six medium-parallelism benchmarks running on the fineKismet: Parallel Speedup Estimates for Serial Programs Donghwan Jeon Saturnino Garcia Chris Louie

Fainman, Yeshaiahu

412

The Impact of Electronic Resources on Serial Cancellations and Remote Storage Decisions in Academic Research Libraries.  

ERIC Educational Resources Information Center

In the past, serial cancellations and storage decisions focused primarily on print resources. With the addition of electronic resources, librarians in large research institutions must now manage an integrated collection of both print and electronic formats. Explores the impact of electronic resources on decision decisions. Identifies criteria for…

Jaguszewski, Janice M.; Probst, Laura K.

2000-01-01

413

Is It Time To Take the Paper Out of Serial Publication?  

ERIC Educational Resources Information Center

The ramifications of shifting from paper to electronic serial publication are discussed in light of the recent National Institutes of Health (NIH) proposal for a comprehensive electronic archive of peer-reviewed and preprint publications. The paper evaluates six concerns that have been expressed about the conversion to a purely electronic journal…

Solomon, David J.

414

Using DERIVE's Graphics Capabilities to Locate the Home Base of a Serial Criminal  

ERIC Educational Resources Information Center

This article will expand upon the techniques of Criminologist, D. Kim Rossmo, and Social Psychologist, David Canter for determining a serial criminal's base of operations. The basic framework for our investigation is that of Rossmo, but uses a different criterion for analysing the relationship of points within the hunting area defined by the crime…

Leinbach, Carl

2011-01-01

415

Coping with Memory Effect and Serial Correlation when Estimating Reliability in a Longitudinal Framework  

ERIC Educational Resources Information Center

Longitudinal studies are permeating clinical trials in psychiatry. Therefore, it is of utmost importance to study the psychometric properties of rating scales, frequently used in these trials, within a longitudinal framework. However, intrasubject serial correlation and memory effects are problematic issues often encountered in longitudinal data.…

Laenen, Annouschka; Alonso, Ariel; Molenberghs, Geert; Vangeneugden, Tony; Mallinckrodt, Craig H.

2010-01-01

416

High-Speed Serial AER on FPGA Hans Kristian Otnes Berge, Philipp Hafliger  

E-print Network

(AEs) requires fewer wires, allows for more compact PCB designs, and the data word with an FPGA that handles the external high speed serial link. We judge the design effort to be much smaller approach is to have a multi-chip system on a PCB with one or several AE processing ASICs and a commercial

Häfliger, Philipp

417

Association between Dyads and Correct Responses on the Paced Auditory Serial Addition Task (PASAT)  

ERIC Educational Resources Information Center

The sensitivity of the Paced Auditory Serial Addition Task (PASAT) to working memory deficits may be enhanced by examining "dyads" (i.e., correct responses immediately preceded by a correct response) as a complement to the traditional total correct summary score. In a sample of 397 mostly African American (79%) healthy adults, total dyad and total…

Gonzalez, Raul; Miller, S. Walden; Carey, Catherine L.; Woods, Steven Paul; Rippeth, Julie D.; Schweinsburg, Brian C.; Norman, Marc A.; Martin, Eileen M.; Heaton, Robert K.

2006-01-01

418

The Paced Auditory Serial Addition Task (PASAT): Norms for Age, Education, and Ethnicity.  

ERIC Educational Resources Information Center

Demographic influences on performance on a modified version of the Paced Auditory Serial Addition Task (D. Gronwall and H. Sampson, 1974), a measure of some cognitive functions, were studied with 566 healthy North-American adults. Age, education, and ethnicity were significant predictors. A formula and tables are presented for computing T scores…

Diehr, Michael C.; Heaton, Robert K.; Miller, Walden; Grant, Igor

1998-01-01

419

Neural network processing of natural language: I. Sensitivity to serial, temporal and abstract structure  

E-print Network

Neural network processing of natural language: I. Sensitivity to serial, temporal and abstract PROCESSES, 2000, 15 (1), 87­127 #12;88 DOMINEY AND RAMUS INTRODUCTION An important part of language structure of language in the infant Peter Ford Dominey Institut des Sciences Cognitives, Bron, France Franck

Dominey, Peter F.

420

Arousal and Retention in Paired-Associate, Serial, and Free Learning. Technical Report No. 91.  

ERIC Educational Resources Information Center

In three experiments employing 60 Ss, arousal was manipulated by white noise during paired-associate, serial, and free learning in an effort to investigate the relationships of arousal and long-term recall. Previous research suggested that high arousal in the paired-associate paradigm leads to better retention relative to low arousal. The present…

Haveman, Jacqueline E.; Farley, Frank H.

421

Design of a massively parallel computer using bit serial processing elements  

NASA Technical Reports Server (NTRS)

A 1-bit serial processor designed for a parallel computer architecture is described. This processor is used to develop a massively parallel computational engine, with a single instruction-multiple data (SIMD) architecture. The computer is simulated and tested to verify its operation and to measure its performance for further development.

Aburdene, Maurice F.; Khouri, Kamal S.; Piatt, Jason E.; Zheng, Jianqing

1995-01-01

422

Segmentation of serial CT images based on an improved Mumford-Shah model  

NASA Astrophysics Data System (ADS)

Segmentation of medical image is an indispensable process in image analysis and recognition, and it provides the basis of quantitative analysis of images about human organs and functions. The Mumford-Shah model using level set method is more robust than other curve evolution models to detect discontinuities under noisy environment, which has been widely used in the field of medical image segmentation. Consequently, serial computed tomography (CT) image segmentation algorithm based on an improved Mumford-Shah model is presented. First of all, the window transformation technique of medical images is introduced, which is able to display the digital imaging and communications in medicine (DICOM) images directly and distinctly with a little information loss. Secondly, the characteristics of serial CT images as well as the topological structure relation between them are analyzed, followed by the processing method of CT image sequence, which can make the serial CT image segmentation much more automatically and swiftly. Thirdly, in the light of the problems of segmentation speed and termination in traditional Mumford-Shah model, a novel segmentation algorithm based on image entropy and simulated annealing is presented. The algorithm alleviates these two problems by using the image entropy to displace the energy coefficients in the original energy function, and also combining the simulated annealing to terminate the contours evolution automatically. Finally, the algorithm is applied in some experiments to deal with serial CT images, and the results of the experiments show that the proposed algorithm can provide a fast and reliable segmentation.

Chen, Yufei; Zhao, Weidong; Wang, Zhicheng

2007-11-01

423

Chaotic behavior study for serial multicellular chopper connected to nonlinear load  

E-print Network

Chaotic behavior study for serial multicellular chopper connected to nonlinear load P. Djondine, R-cells chopper when it is associated with a nonlinear load is considered. The model of such system is described to nonlinear load may have a chaotic behavior. III. CHAOTIC BEHAVIOR A. Modelling For the sake of simplicity

Paris-Sud XI, Université de

424

Serial population bottlenecks and genetic variation: Translocated populations of the New Zealand Saddleback ( Philesturnus carunculatus rufusater )  

Microsoft Academic Search

The genetic effects of population bottlenecks have been well studied theoretically, in laboratory studies, and to some extent, in natural situations. The effects of serial population bottlenecks (SPBs), however, are less well understood. This is significant because recurrent population bottlenecks are likely to be a common feature of the life history of many species. The lack of understanding of SPBs

D. M. Lambert; T. King; L. D. Shepherd; A. Livingston; S. Anderson; J. L. Craig

2005-01-01

425

The Simultaneous Type, Serial Token Model of Temporal Attention and Working Memory  

ERIC Educational Resources Information Center

A detailed description of the simultaneous type, serial token (ST[squared]) model is presented. ST[squared] is a model of temporal attention and working memory that encapsulates 5 principles: (a) M. M. Chun and M. C. Potter's (1995) 2-stage model, (b) a Stage 1 salience filter, (c) N. G. Kanwisher's (1987, 1991) types-tokens distinction, (d) a…

Bowman, Howard; Wyble, Brad

2007-01-01

426

Statistical learning in a serial reaction time task: Access to separable statistical cues by individual learners  

Microsoft Academic Search

The ability of adult learners to exploit the joint and conditional probabilities in a serial reaction time task containing both deterministic and probabilistic information was investigated. Learners used the statistical information embedded in a continuous input stream to improve their performance for certain transitions by simultaneously exploiting differences in the predictability of 2 or more underlying statistics. Analysis of individual

Ruskin H. Hunt; Richard N. Aslin

2001-01-01

427

Computer Braille Translation of Serials: A Demonstration, Feasibility Study, and Implications for Librarianship.  

ERIC Educational Resources Information Center

This thesis investigates the impact of computer Braille on blind professionals in terms of their need for, the availability of, and the cost of production of Braille transcriptions of serials. Related problems of an economic, legal, and educational nature are discussed as they impinge on the area of investigation. The thesis is in three parts:…

Michel, Moshe

428

The exact distributions of the serial correlation coefficients and an evaluation on some approximate distributions  

Microsoft Academic Search

This paper presents the problem of finding the distribution of the standard serial correlation coefficients under the asumption that the sample comes from a norml distribution. All well-used approximate distributions are given and procedures for calculating the exact distributions—now available—are discussed.

Heather Goldsmith

1977-01-01

429

The Serial Use of Child Neurocognitive Tests: Development versus Practice Effects  

ERIC Educational Resources Information Center

When serial neurocognitive assessments are performed, 2 main factors are of importance: test-retest reliability and practice effects. With children, however, there is a third, developmental factor, which occurs as a result of maturation. Child tests recognize this factor through the provision of age-corrected scaled scores. Thus, a ready-made…

Slade, Peter D.; Townes, Brenda D.; Rosenbaum, Gail; Martins, Isabel P.; Luis, Henrique; Bernardo, Mario; Martin, Michael D.; DeRouen, Timothy A.

2008-01-01

430

Serial proton magnetic resonance spectroscopy in a patient with the interval form of carbon monoxide poisoning  

Microsoft Academic Search

Serial proton magnetic resonance spectroscopy (1H-MRS) studies were performed from immediately after the appearance of sequelae in a patient with the interval form of carbon monoxide (CO) poisoning. The volume of interest was set over the frontal lobe white matter. In the early period a persistent increase in choline was found, which was thought to reflect the course of progressive

T Murata; S Itoh; Y Koshino; M Omori; I Murata; K Sakamoto; K Isaki; H Kimura; Y Ishii

1995-01-01

431

Serial Vagus Nerve Stimulation Functional MRI in Treatment-Resistant Depression  

Microsoft Academic Search

Vagus nerve stimulation (VNS) therapy has shown antidepressant effects in open acute and long-term studies of treatment-resistant major depression. Mechanisms of action are not fully understood, although clinical data suggest slower onset therapeutic benefit than conventional psychotropic interventions. We set out to map brain systems activated by VNS and to identify serial brain functional correlates of antidepressant treatment and symptomatic

Ziad Nahas; Charlotte Teneback; Jeong-Ho Chae; Qiwen Mu; Chris Molnar; Frank A Kozel; John Walker; Berry Anderson; Jejo Koola; Samet Kose; Mikhail Lomarev; Daryl E Bohning; Mark S George

2007-01-01

432

Design And Control Of A Robotic Manipulator With A Hybrid Serial-Pararall Link Structure  

Microsoft Academic Search

A design method is proposed for balan- cing the lower and upper arms by adding two pneumatic cylinders to the conventional manipulator. The sizes of the cylinders and locations of the cylinder mountings are determined by computer programmes based on Rosenbrock's hill climbing algorithm and linear programming method respectively. The statically balanced manipulator exhibits the characteristics of both the serial

P. C. Chiu; K. F. Lee

1988-01-01

433

Dendritic Spines of Rat Cerebellar Purkinje Cells: Serial Electron Microscopy with Reference to Their Biophysical Characteristics  

Microsoft Academic Search

We have used serial electron microscopy and Z&dimensional reconstructions of dendritic spines from Purkinje spiny branchlets of normal adult rats to evaluate 2 questions about the relationships of spine geometry to synaptic efficacy. First, do relationships between spine geometry and other anatom- ical indicators of synaptic activity suggest that spine size and shape might be associated with synaptic efficacy? Re-

Kristen M. Harris; John K. Steven

1988-01-01

434

Serial Intraoperative MR Imaging of Brain Shift Arya Nabavi, M.D.1  

E-print Network

, open- configuration MRI, serial imaging Introduction Computer-assisted, image-guided neurosurgery Division of Neurosurgery 2 Department of Radiology 3 Surgical Planning Laboratory, Brigham and Women@bwh.harvard.edu Abstract Introduction: The major shortcoming of image-guided navigational systems is the use

435

Serial MR Imaging in Suprasellar Xanthogranuloma: Growth Pattern and New Lesions.  

PubMed

Xanthogranuloma is a rare lesion of the sellar-suprasellar region. We describe a case of suprasellar xanthogranuloma in whom serial MRI revealed features that have not been previously described-development of dural tail, vascular encasement and intra-axial lesions in posterior fossa. PMID:25291505

Madan Mohan, Balaguruswamy; Mohamed, Ezaz; Jain, Sunil Kumar; Jain, Manoj; Jaiswal, Awadesh Kumar

2014-10-01

436

The making of a serial false confessor: The confessions of Henry Lee Lucas  

Microsoft Academic Search

This report describes the case of Henry Lee Lucas, who is estimated to have confessed to over 600 murders in the early 1980s. He is the most prolific serial confessor in recent history and is currently on death row in Texas, awaiting his execution. The author interviewed Mr Lucas in 1996 and conducted a detailed psychological evaluation at the request

Gisli Gudjonsson

1999-01-01

437

Embedded Equalization for ADC-Based Serial I/O Receivers  

E-print Network

Embedded Equalization for ADC-Based Serial I/O Receivers Ayman Shafik, Keytaek Lee, Ehsan Zhian, the performance impact of embedding partial equalization in ADC-based receivers is analyzed. A hybrid ADC receiver architecture which includes embedded equalization and selective digital equalization power-down based

Palermo, Sam

438

Serial intravascular ultrasound studies fail to show evidence of chronic Palmaz-Schatz stent recoil  

Microsoft Academic Search

Serial IVUS analysis after intervention and at follow-up showed that late recoil of the Palmaz-Schatz stent rarely occurred, and when it did occur, late stent recoil was minimal. The dominant mechanism of late lumen loss in this setting was neointimal hyperplasia.

Jack A. Painter; Gary S. Mintz; S. Chiu Wong; Jeffrey J. Popma; Augusto D. Pichard; Kenneth M. Kent; Lowell F. Satler; Martin B. Leon

1995-01-01

439

The Burgundy Effect in Off-Line Union Catalogs of Serials.  

ERIC Educational Resources Information Center

Discusses interlibrary lending (ILL) systems and explains the localization effect--called "the burgundy effect"--which results in a partial union catalog of serials locating a higher percentage of ILL requests than an up-to-date catalog over a number of years. An econometric model, the Weibull distribution, is used to calculate localization…

De Groote, Stefan; And Others

1991-01-01

440

Solution of inverse kinematic problem for serial robot using dual quaterninons and plücker coordinates  

Microsoft Academic Search

In this paper we present a new formulation method to solve kinematic problem of serial robot manipulators. In this method our major aims are to formulize inverse kinematic problem in a compact closed form and to avoid singularity problem. This formulation is based on screw theory with dual - quaternion. Compared with other methods, screw theory methods just establish two

E. Sariyildiz; H. Temeltas

2009-01-01

441

Response of rodents to inhaled diluted diesel exhaust: biochemical and cytological changes in bronchoalveolar lavage fluid and in lung tissue  

SciTech Connect

The effect of long-term (24 months) inhalation of diesel exhaust on the bronchoalveolar region of the respiratory tract of rodents was assessed by serial (every 6 months) analysis of bronchoalveolar lavage fluid (BALF) and of lung tissue from F344/Crl rats and CD-1 mice (both sexes) exposed to diesel exhaust diluted to contain 0, 0.35, 3.5, or 7.0 mg soot/m3. The purpose of the study was twofold. One was to assess the potential health effects of inhaling diluted exhaust from light-duty diesel engines. The second was to determine the usefulness of BALF analysis in detecting the early stages in the development of nononcogenic lung disease and differentiating them from the normal repair processes. No biochemical or cytological changes in BALF or in lung tissue were noted in either species exposed to the lowest, and most environmentally relevant, concentration of diesel exhaust. In the two higher levels of exposure, a chronic inflammatory response was measured in both species by dose-dependent increases in inflammatory cells, cytoplasmic and lysosomal enzymes, and protein in BALF. Histologically, after 1 year of exposure, the rats had developed focal areas of fibrosis associated with the deposits of soot, while the mice, despite a higher lung burden of soot than the rats, had only a fine fibrillar thickening of an occasional alveolar septa in the high-level exposure group. Higher increases in BALF beta-glucuronidase activity and in hydroxyproline content accompanied the greater degree of fibrosis in the rat. BALF levels of glutathione (GSH) and glutathione reductase activity increased in a dose-dependent fashion and were higher in mice than in rats. Lung tissue GSH was depleted in a dose-dependent fashion in rats but was slightly increased in mice.

Henderson, R.F.; Pickrell, J.A.; Jones, R.K.; Sun, J.D.; Benson, J.M.; Mauderly, J.L.; McClellan, R.O.

1988-10-01

442

Population changes in Leishmania chagasi promastigote developmental stages due to serial passage.  

PubMed

Leishmania chagasi causes visceral leishmaniasis, a potentially fatal disease of humans. Within the sand fly vector, L. chagasi replicates as promastigotes which undergo complex changes in morphology as they progress from early stage procyclic promastigotes, to intermediate stage leptomonad and nectomonad promastigotes, and ultimately to terminal stage metacyclic promastigotes that are highly infective to vertebrates. This developmental progression is largely recapitulated in vitro using axenic promastigote cultures that have been passaged only a few times. Within a single passage (which takes about a week), axenic cultures progress from logarithmic to stationary growth phases; parasites within those growth phases progress from stages that do not have metacyclic cell properties to ones that do. Interestingly, repeated serial passage of promastigote cultures will result in cell populations that exhibit perturbations in developmental progression, in expression levels of surface macromolecules (major surface protease, MSP, and promastigote surface antigen, PSA), and in virulence properties, including resistance to serum lysis. Experiments were performed to determine whether there exists a direct relationship between promastigote developmental form and perturbations associated with repeated serial passage. Passage 2 to passage 4 L. chagasi cultures at stationary growth phase were predominately (>85%) comprised of metacyclic promastigotes and exhibited high resistance to serum lysis and high levels of MSP and PSA. Serial passaging 8, or more, times resulted in a stationary phase population that was largely (>85%) comprised of nectomonad promastigotes, almost completely devoid (<2%) of metacyclic promastigotes, and that exhibited low resistance to serum lysis and low levels of MSP and PSA. The study suggests that the loss of particular cell properties seen in cells from serially passaged cultures is principally due to a dramatic reduction in the proportion of metacyclic promastigotes. Additionally, the study suggests that serially passaged cultures may be a highly enriched source of nectomonad-stage promastigotes, a stage that has largely been characterized only in mixtures containing other promastigote forms. PMID:21158623

Lei, Soi Meng; Romine, Nathan M; Beetham, Jeffrey K

2010-12-01

443

EDITORIAL: Focus on Dilute Magnetic Semiconductors FOCUS ON DILUTE MAGNETIC SEMICONDUCTORS  

NASA Astrophysics Data System (ADS)

This focus issue of New Journal of Physics is devoted to the materials science of dilute magnetic semiconductors (DMS). A DMS is traditionally defined as a diamagnetic semiconductor doped with a few to several atomic per cent of some transition metal with unpaired d electrons. Several kinds of dopant dopant interactions can in principle couple the dopant spins leading to a ferromagnetic ground state in a dilute magnetic system. These include superexchange, which occurs principally in oxides and only between dopants with one intervening oxygen, and double exchange, in which dopants of different formal charges exchange an electron. In both of these mechanisms, the ferromagnetic alignment is not critically dependent on free carriers in the host semiconductor because exchange occurs via bonds. A third mechanism, discovered in the last few years, involves electrons associated with lattice defects that can apparently couple dopant spins. This mechanism is not well understood. Finally, the most desirable mechanism is carrier-mediated exchange interaction in which the dopant spins are coupled by itinerant electrons or holes in the host semiconductor. This mechanism introduces a fundamental link between magnetic and electrical transport properties and offers the possibility of new spintronic functionalities. In particular electrical gate control of ferromagnetism and the use of spin polarized currents to carry signals for analog and digital applications. The spin light emitting diode is a prototypical device of this kind that has been extensively used to characterize the extent of spin polarization in the active light emitting semiconductor heterostructure. The prototypical carrier mediated ferromagnetic DMS is Mn-doped GaAs. This and closely related narrow gap III V materials have been very extensively studied. Their properties are generally quite well understood and they have led to important insights into fundamental properties of ferromagnetic systems with strong spin-orbit coupling. They have also led to the demonstration of a wide range of novel phenomena including some, like tunneling anisotropic magnetoresistance, which have subsequently been achieved in metal ferromagnetic systems. However despite considerable effort over many years the maximum Curie point achieved in (Ga,Mn)As is still less than 200 K. So unless some major new breakthrough is achieved these materials are unlikely to be of use for practical spin electronics technologies. In 2000, Dietl et al [1] published a seminal paper in which mean field theory was used to predict which of the common diamagnetic semiconductors would exhibit a Curie point above ambient if doped with 5 at.% Mn and a hole concentration of 3.5 × 1020 cm-3. Of the many host semiconductors simulated, only ZnO and GaN were predicted to exhibit a critical temperature in excess of 300 K. Since 2000, high-Tc DMS research has proliferated in both experimental and theoretical arenas. Many papers have been published containing claims of new DMS materials based largely on limited film growth, powder diffraction, and magnetometry. In these papers, a film which exhibits a hysteretic SQUID or VSM loop at 300 K and phase purity with only the host semiconductor detected by XRD are often claimed to be true ferromagnetic DMSs. Many of these papers are flawed because the criteria for a well-defined DMS are much more extensive. These include: (i) a random dopant distribution, (ii) a well-known and preferably unique charge state and preferentially a unique local structural environment for the dopant, (iii) a demonstrated coupling of the dopant spin to the host band structure, leading to spin polarization of the majority carriers, and (iv) a rational dependence of the saturation magnetization and Curie point on the magnetic dopant and carrier concentrations. Implicit in this list is that trivial causes of ferromagnetism, such as magnetic contamination and magnetic secondary phase formation, are eliminated. Yet, in many papers, the authors have not carried out the necessary control experiments and materials c

Chambers, Scott A.; Gallagher, Bryan

2008-05-01

444

Dilution as a Model of Long-Term Forgetting  

ERIC Educational Resources Information Center

This article presents a model of long term forgetting based on 3 ideas: (a) Memory for a stimulus can be described by a population of accessible traces; (b) probability of retrieval after a delay is predicted by the proportion of traces in this population that will be defined as correct if sampled; and (c) this population is diluted over time by…

Lansdale, Mark; Baguley, Thom

2008-01-01

445

Color dilution alopecia in a blue Doberman pinscher crossbreed  

PubMed Central

A 6-year-old male, blue Doberman pinscher crossbreed was presented with coat abnormalities; in particular, flank alopecia and pruritus. Based on medical the history, clinical evidence, and histopathological examination, color dilution alopecia was diagnosed. The dog was with oral melatonin treated for 3 months without success. PMID:19436637

Perego, Roberta; Proverbio, Daniela; Roccabianca, Paola; Spada, Eva

2009-01-01

446

Dilution and volatilization of groundwater contaminant discharges in streams.  

PubMed

An analytical solution to describe dilution and volatilization of a continuous groundwater contaminant plume into streams is developed for risk assessment. The location of groundwater plume discharge into the stream (discharge through the side versus bottom of the stream) and different distributions of the contaminant plume concentration (Gaussian, homogeneous or heterogeneous distribution) are considered. The model considering the plume discharged through the bank of the river, with a uniform concentration distribution was the most appropriate for risk assessment due to its simplicity and limited data requirements. The dilution and volatilization model is able to predict the entire concentration field, and thus the mixing zone, maximum concentration and fully mixed concentration in the stream. It can also be used to identify groundwater discharge zones from in-stream concentration measurement. The solution was successfully applied to published field data obtained in a large and a small Danish stream and provided valuable information on the risk posed by the groundwater contaminant plumes. The results provided by the dilution and volatilization model are very different to those obtained with existing point source models, with a distributed source leading to a larger mixing length and different concentration field. The dilution model can also provide recommendations for sampling locations and the size of impact zones in streams. This is of interest for regulators, for example when developing guidelines for the implementation of the European Water Framework Directive. PMID:25496819

Aisopou, Angeliki; Bjerg, Poul L; Sonne, Anne T; Balbarini, Nicola; Rosenberg, Louise; Binning, Philip J

2015-01-01

447

Dilution and volatilization of groundwater contaminant discharges in streams  

NASA Astrophysics Data System (ADS)

An analytical solution to describe dilution and volatilization of a continuous groundwater contaminant plume into streams is developed for risk assessment. The location of groundwater plume discharge into the stream (discharge through the side versus bottom of the stream) and different distributions of the contaminant plume concentration (Gaussian, homogeneous or heterogeneous distribution) are considered. The model considering the plume discharged through the bank of the river, with a uniform concentration distribution was the most appropriate for risk assessment due to its simplicity and limited data requirements. The dilution and volatilization model is able to predict the entire concentration field, and thus the mixing zone, maximum concentration and fully mixed concentration in the stream. It can also be used to identify groundwater discharge zones from in-stream concentration measurement. The solution was successfully applied to published field data obtained in a large and a small Danish stream and provided valuable information on the risk posed by the groundwater contaminant plumes. The results provided by the dilution and volatilization model are very different to those obtained with existing point source models, with a distributed source leading to a larger mixing length and different concentration field. The dilution model can also provide recommendations for sampling locations and the size of impact zones in streams. This is of interest for regulators, for example when developing guidelines for the implementation of the European Water Framework Directive.

Aisopou, Angeliki; Bjerg, Poul L.; Sonne, Anne T.; Balbarini, Nicola; Rosenberg, Louise; Binning, Philip J.

2015-01-01

448

Dry dilution refrigerator with 4He-1 K-loop  

NASA Astrophysics Data System (ADS)

In this article we summarize experimental work on cryogen-free 3He/4He dilution refrigerators which, in addition to the dilution refrigeration circuit, are equipped with a 4He-1 K-stage. This type of DR becomes worth considering when high cooling capacities are needed at T ? 1 K to cool cold amplifiers and heat sink cables. In our application, the motivation for the construction of this type of cryostat was to do experiments on superconducting quantum circuits for quantum information technology and quantum simulations. In other work, DRs with 1 K-stage were proposed for astro-physical cryostats. For neutron scattering research, a top-loading cryogen-free DR with 1 K-stage was built which was equipped with a standard commercial dilution refrigeration insert. Cooling powers of up to 100 mW have been reached with our 1 K-stage, but higher refrigeration powers were achieved with more powerful pulse tube cryocoolers and higher 4He circulation rates in the 1 K-loop. Several different versions of a 1 K-loop have been tested in combination with a dilution refrigeration circuit. The lowest temperature of our DR was 4.3 mK.

Uhlig, Kurt

2015-03-01

449

Electrical resistivity imaging of conductive plume dilution in fractured rock  

NASA Astrophysics Data System (ADS)

Electrical resistance tomography (ERT) was used to monitor a conductive plume dilution experiment that was conducted in fractured basalt in order to assess its applications in this type of fractured-rock environment. Tap water was injected into an injection well for 34 days to dilute a pre-existing potassium chloride (KCl) plume at a site in Idaho, USA. No further fluids were introduced artificially during a 62-day monitoring period. Both surface ERT and cross-borehole ERT were used to monitor dilution and displacement of the plume. A square grid of land-surface electrodes was used with the surface ERT. Three-dimensional images of surface ERT delineated areas of increased and decreased resistivities. Increasing resistivities are attributed to dilution/displacement of the KCl solution by tap-water invasion or the influx of seasonal recharge. Decreasing resistivities resulted from redistribution of residual KCl solution. Cross-borehole ERT was conducted between the injection well and each of seven surrounding monitoring wells. Polar plots of the injection-well resistivity data in the direction of each monitoring well delineate specific locations where tap water seeped from the injection well via preferential flow paths determined by time-dependent resistivity increases. Monitoring-well data indicate locations of clustered and isolated regions of resistivity changes.

Nimmer, Robin E.; Osiensky, James L.; Binley, Andrew M.; Sprenke, Kenneth F.; Williams, Barbara C.

2007-08-01

450

Novel diluted magnetic semiconductor materials based on zinc oxide  

Microsoft Academic Search

The primary aim of this work was to develop a ZnO based diluted magnetic semiconductor (DMS) materials system which displays ferromagnetism above room temperature and to understand the origin of long-range ferromagnetic ordering in these systems. Recent developments in the field of spintronics (spin based electronics) have led to an extensive search for materials in which semiconducting properties can be

Deepayan Chakraborti

2008-01-01

451

Chemical transformations of Populus trichocarpa during dilute acid pretreatment  

E-print Network

a renaissance in the development of renewable and sustainable energy options. The utilization of non-food and methoxyl group content and these changes were accompanied with an increase in condensed lignin. The dilute. Introduction Increasing concerns about diminishing fossil fuel resources and energy security have spurred

California at Riverside, University of

452

SEPARATION OF DILUTE HAZARDOUS ORGANICS BY LOW PRESSURE COMPOSITE MEMBRANES  

EPA Science Inventory

The separation of dilute hazardous organics was accomplished through this project utilizing thin-film composite aromatic polyamide membranes. This technique offers advantages in terms of high solute separation at low pressures (1-2 MPa) and broad pH operating ranges (pH 2 to 12)....

453

ETHANOL FERMENTATION OF SUGARS IN CORN STOVER DILUTE ACID HYDROLYSATES  

Technology Transfer Automated Retrieval System (TEKTRAN)

The biomass-to-ethanol fermentation process is limited in part by the presence of inhibitory compounds that are formed when biomass is pretreated with dilute acid to release fermentable sugars. We have developed a biological system for abatement of inhibitory chemicals and incorporated its use into...

454

Inhomogeneity in Co doped ZnO diluted magnetic semiconductor  

Microsoft Academic Search

Here, we have studied the chemical and magnetic interactions in Co doped ZnO diluted magnetic semiconductor by ab initio density functional calculations. The calculated chemical pair interaction parameters suggest a strong tendency of clustering between Co atoms. Both chemical and magnetic pair interaction parameters are short ranged with a large first neighbor interaction. Monte Carlo simulations show that the Curie

B. Sanyal; R. Knut; O. Näs; D. M. Iusan; O. Karis; O. Eriksson

2008-01-01

455

33 CFR 154.824 - Inerting, enriching, and diluting systems.  

Code of Federal Regulations, 2012 CFR

...concentration reading controls the inerting or enriching system and activates...alarm and automatic shutdown...concentration reading controls the enriching system and activates...alarm and automatic shutdown...concentration reading controls the diluting system and activates...alarm and automatic...

2012-07-01

456

33 CFR 154.824 - Inerting, enriching, and diluting systems.  

Code of Federal Regulations, 2011 CFR

...concentration reading controls the inerting or enriching system and activates...alarm and automatic shutdown...concentration reading controls the enriching system and activates...alarm and automatic shutdown...concentration reading controls the diluting system and activates...alarm and automatic...

2011-07-01

457

33 CFR 154.824 - Inerting, enriching, and diluting systems.  

Code of Federal Regulations, 2013 CFR

...concentration reading controls the inerting or enriching system and activates...alarm and automatic shutdown...concentration reading controls the enriching system and activates...alarm and automatic shutdown...concentration reading controls the diluting system and activates...alarm and automatic...

2013-07-01

458

Dry Dilution Refrigerator with He-4 Precool Loop  

E-print Network

He-3/He-4 dilution refrigerators (DR) are very common in sub-Kelvin temperature research. We describe a pulse tube precooled DR where a separate He-4 circuit condenses the He-3 of the dilution loop. Whereas in our previous work the dilution circuit and the He-4 circuit were separate, we show how the two circuits can be combined. Originally, the He-4 loop with a base temperature of ~ 1 K was installed to make an additional cooling power of up to 100 mW available to cool cold amplifiers and electrical lines. In the new design, the dilution circuit is run through a heat exchanger in the vessel of the He-4 circuit so that the condensation of the He-3 stream of the DR is done by the He-4 stage. A much reduced condensation time (factor of 2) of the He-3/He-4 gas mixture at the beginning of an experiment is achieved. A compressor is no longer needed with the DR as the condensation pressure remains below atmospheric pressure at all times; thus the risk of losing expensive He-3 gas is small. The performance of the DR ...

Uhlig, K

2014-01-01

459

Activity coefficients in dilute aqueous solutions from free energy simulations  

Microsoft Academic Search

Aqueous mixtures are encountered in a large number of industrial operations, such as petroleum processing, coal gasification, separations, and waste treatment. The free energy perturbation method with Monte Carlo simulations has been used to calculate relative solvation free energies and ratios of activity coefficients of organic solutes at infinite-dilution in water at 25 C. System studied include hydrocarbons, chlorinated hydrocarbons,

Themis Lazaridis; Michael E. Paulaitis

1993-01-01

460

Ethanol production with dilute acid hydrolysis using partially dried lignocellulosics  

DOEpatents

A process of converting lignocellulosic biomass to ethanol, comprising hydrolyzing lignocellulosic materials by subjecting dried lignocellulosic material in a reactor to a catalyst comprised of a dilute solution of a strong acid and a metal salt to lower the activation energy (i.e., the temperature) of cellulose hydrolysis and ultimately obtain higher sugar yields.

Nguyen, Quang A. (Chesterfield, MO); Keller, Fred A. (Lakewood, CO); Tucker, Melvin P. (Lakewood, CO)

2003-12-09

461

Maximum-likelihood estimation for indicator dilution analysis.  

PubMed

Indicator-dilution methods are widely used by many medical imaging techniques and by dye-, lithium-, and thermodilution measurements. The measured indicator dilution curves are typically fitted by a mathematical model to estimate the hemodynamic parameters of interest. This paper presents a new maximum-likelihood algorithm for parameter estimation, where indicator dilution curves are considered as the histogram of underlying transit-time distribution. Apart from a general description of the algorithm, semianalytical solutions are provided for three well-known indicator dilution models. An adaptation of the algorithm is also introduced to cope with indicator recirculation. In simulations as well as in experimental data obtained by dynamic contrast-enhanced ultrasound imaging, the proposed algorithm shows a superior parameter estimation accuracy over nonlinear least-squares regression. The feasibility of the algorithm for use in vivo is evaluated using dynamic contrast-enhanced ultrasound recordings obtained with the purpose of prostate cancer detection. The proposed algorithm shows an improved ability (increase in receiver-operating characteristic curve area of up to 0.13) with respect to existing methods to differentiate between healthy tissue and cancer. PMID:24239967

Kuenen, Maarten P J; Herold, Ingeborg H F; Korsten, Hendrikus H M; de la Rosette, Jean J M C H; Wijkstra, Hessel; Mischi, Massimo

2014-03-01

462

Reusable chelating resins concentrate metal ions from highly dilute solutions  

NASA Technical Reports Server (NTRS)

Column chromatographic method uses new metal chelating resins for recovering heavy-metal ions from highly dilute solutions. The absorbed heavy-metal cations may be removed from the chelating resins by acid or base washes. The resins are reusable after the washes are completed.

Bauman, A. J.; Weetal, H. H.; Weliky, N.

1966-01-01

463

QUENCHED-IN VACANCIES IN DILUTE ALUMINIUM-MAGNESIUM ALLOYS  

Microsoft Academic Search

Electron-microscope observations of the development of prismatic ; dislocation loops due to quenched-in vacancies in dilute aluminum-magnesium ; alloys were made in connection with measurements of the dimensional changes of ; quenched specimens. From this irformation direct evidence for the collapse of ; vacancy clusters into prismatic dislocation loops was obtained. The retardation ; of the development of prismatic loops

J. Takamura; K. Okazaki; I. G. Greenfield

1963-01-01

464

Subcutaneous infusion anesthesia with diluted mixtures of prilocain and ropivacain  

Microsoft Academic Search

Background: Local anesthesia often suffices for surgery on the outside of the body. In recent years, it has been found that such local anesthesia can be adequately carried out using large amounts of highly diluted anesthetic solutions. Methods: Using one or more common infusomats, we injected mixed anesthetic solutions slowly, painlessly, paravenously, and automatically via subcutaneous infusion anesthesia (SIA) into

Helmut Breuninger; Franz Schimek; Peter Heeg

2000-01-01

465

Mediodorsal thalamic lesions block the stress-induced inversion of serial memory retrieval pattern in mice.  

PubMed

This study examines the effects of ibotenic acid lesions of the mediodorsal nucleus of the thalamus (MD) on serial contextual memory retrieval in non-stress and stress conditions. Independent groups of mice learned two successive contextual serial discriminations (D1 and D2) in a four-hole board. The discriminations differed each by the color and texture of the floor. Twenty-four hours later, memory testing occurred in independent groups of mice on one of the two floors of the initial acquisition session. Half of the subjects received three electric footschocks (0.9mA, 2s) 5min prior to testing. Results showed that (i) stress induced a plasma corticosterone rise of same magnitude in sham-operated and MD-lesioned mice; (ii) non-stressed sham-operated mice accurately remembered D1 but not D2, whereas stressed sham-operated animals remembered D2 but not D1; (iii) non-stressed MD-lesioned mice exhibited a memory retrieval pattern similar to that observed in non-stressed sham-operated mice; (iv) however, the stress-induced inversion of the memory retrieval pattern was not observed in MD animals. The effects of MD lesions on memory retrieval in this task are similar to those observed in earlier studies in prefrontal cortex or amygdala-lesioned mice [Chauveau F, Piérard C, Coutan M, Drouet I, Liscia P, Béracochéa D. Prefrontal cortex or basolateral amygdala lesions blocked the stress-induced inversion of serial memory pattern in mice. Neurobiol Learn Mem 2008;90:395-403]; they are however in sharp contrast with mice exhibiting hippocampal lesions [Chauveau F, Pierard C, Tronche C, Coutan M, Drouet I, Liscia P, et al. The hippocampus and prefrontal cortex are differentially involved in serial memory retrieval in non-stress and stress condition. Neurobiol Learn Mem; in press; Chauveau F, Pierard C, Tronche C, Coutan M, Drouet I, Liscia P, et al. Rapid stress-induced corticosterone rise in the hippocampus reverses serial memory retrieval pattern. Hippocampus; in press]. Overall, the present findings highlight the involvement of the MD in an AMG/PFC system mediating the rapid effects of stress on serial memory retrieval. PMID:19464320

Chauveau, Frédéric; Piérard, Christophe; Corio, Marc; Célérier, Aurélie; Christophe, Tronche; Vouimba, Rose Marie; Guillou, J L; Béracochéa, Daniel

2009-11-01

466

When Verbs Collide: Papers from the Ohio State Mini-Conference on Serial Verbs (Columbus, Ohio, May 26-27, 1990). Working Papers in Linguistics No. 39.  

ERIC Educational Resources Information Center

Papers from the conference on the occurrence of verbal constituents in series in certain languages, particularly pidgins and creoles, include the following: "What Are We Talking About When We Talk About Serial Verbs?" (Arnold M. Zwicky); "Serial Verb Constructions" (Pieter Seuren); "On the Definition and Distribution of Serial Verb Constructions"…

Joseph, Brian D., Ed.; Zwicky, Arnold M., Ed.

467

Abstract--We present a framework for the planning of end effector trajectories for serially linked robots with a non-fixed,  

E-print Network

Hyper-redundant, serially linked modular robots-- commonly referred to as snake robots--have long been robots with a non-fixed, also known as floating, support base. The FBSR (Floating Base, Serial Reach) planning algorithm extends the capabilities of serially linked, floating-base robots by planning

Choset, Howie

468

Dilute bismuthides on inp platform: growth, characterization, modeling and application  

NASA Astrophysics Data System (ADS)

Conventional III-V compounds (GaAs/ InGaAs/ InAlAs) containing a small amount of bismuth are called dilute bismuthides (a.k.a. dilute bismides). They are a relatively new class of materials and have interesting optical and electrical properties that lead to a large number of novel applications in mid-infrared(mid-IR) optoelectronics, IR transparent contact materials, photovoltaics and thermoelectrics. This dissertation focuses on the growth and characterization of dilute bismuthides with potential use in the first three applications. Incorporating Bi into conventional III-V compounds will cause a unique phenomenon called valence band anticrossing(VBAC). The interaction between the bismuth atom and the matrix material will make the valence band split into two bands: E+ and E-; E+ is closer to the conduction band than the original valence band of the matrix material. Using this effect, we can adjust the band gap and the valence band position of dilute bismuthides by controlling the bismuth concentration. The growth of bismuth-containing materials using molecular beam epitaxy (MBE) requires low growth temperature and strict stoichiometric III-V ratio. This dissertation will discuss in detail the optimum growth condition of InGaBiAs, the challenge of increasing the bismuth concentration, and the possible solution to produce high bismuth concentration samples. Accordingly, composition, strain and relaxation, surface morphology, optical properties and electrical properties of InGaBiAs thin films are characterized to study these materials. The first application of InGaBiAs is mid-IR optoelectronic materials. The band gap of InGaBiAs can be tuned within the mid-IR range, and the film can be produced being lattice-matched to the InP substrate. In addition, degenerately doped InGaBiAs:Si is an ideal choice for the transparent contact material in the infrared range due to its high transmittance and conductivity in this wavelength range. We next proposed a new upconversion solar cell design with the incorporation of dilute bismuthides, which is expected to enable very high solar cell efficiency. Finally, this dissertation discussed some future directions in this field: high bismuth concentration films, a measurement to fully understand the band structure of InGaBiAs and a proposal of temperature-insensitive application. As a conclusion, dilute bismuthides remain promising as optoelectronic materials.

Zhong, Yujun

469

The Carlina-type diluted telescope. Stellar fringes on Deneb  

NASA Astrophysics Data System (ADS)

Context. The performance of interferometers has been much increased over the past ten years. But the number of observable objects is still limited by the low sensitivity and imaging capability of the current facilities. Studies have been conducted with the aim to propose a new generation of interferometers. Aims: The Carlina concept studied at the Haute-Provence Observatory consists of an optical interferometer configured as a diluted version of the Arecibo radio telescope: above the diluted primary mirror made of fixed co-spherical segments, a helium balloon or cables that are suspended between two mountains and/or pylons carry a gondola containing the focal optics. This concept does not require delay lines. Methods: Since 2003, we have been building a technical demonstrator of this diluted telescope. The main goals of this project were to find opto-mechanical solutions to stabilize the optics attached to cables at several tens of meters above the ground, and to characterize this diluted telescope under real conditions. In 2012, we obtained metrology fringes, and co-spherized the primary mirrors within one micron accuracy. In 2013, we tested the whole optical train: servo loop, metrology, and the focal gondola. Results: We obtained stellar fringes on Deneb in September 2013. We here present the characteristics of these observations: quality of the guiding, signal-to-noise ratio reached, and possible improvements for a future system. Conclusions: By detecting fringes on Deneb, we confirm that the entire system conceptually has worked correctly. It also proves that when the primary mirrors are aligned using the metrology system, we can directly record fringes in the focal gondola, even in blind operation. It is an important step that demonstrates the feasibility of building a diluted telescope using cables strained between cliffs or pylons. Carlina, like the Multiple Mirror Telescope (MMT) or Large Binocular Telescope (LBT), could be one of the first members of a new class of telescopes named large diluted telescopes. Its optical architecture has many advantages for future projects: Planet Formation Imager (PFI), post-ELTs, interferometer in space.

Le Coroller, H.; Dejonghe, J.; Hespeels, F.; Arnold, L.; Andersen, T.; Deram, P.; Ricci, D.; Berio, P.; Blazit, A.; Clausse, J.-M.; Guillaume, C.; Meunier, J. P.; Regal, X.; Sottile, R.

2015-01-01

470

Slippage and Migration in Taylor-Couette Flow of a Model for Dilute Wormlike Micellar Solutions  

E-print Network

In this paper we explore a model, most appropriate for dilute or semi-dilute worm-like micellar solutions, in an axisymmetric circular Taylor-Couette geometry. This study is a natural continuation of earlier work on ...

Rossi, Louis F.

2005-06-09

471

Associative relatedness enhances recall and produces false memories in immediate serial recall.  

PubMed

The influence of permanent lexical network in immediate serial recall is well established. The corresponding influence of permanent semantic networks is less clear, although such networks are known to both facilitate memory in long-term memory tasks and to produce false memories in those same tasks. The current experiment involves the study of Deese-Roediger-McDermott (DRM) lists for immediate serial recall. The trials in the experiment involved presenting the six strongest items from the DRM lists either in intact associatively related lists or where those items had been randomly mixed to produce unrelated lists. The results of the experiment indicated that the associatively related lists were better recalled in order than unrelated lists and the nonpresented critical lure was falsely recalled relatively frequently. The results of the experiment confirm the importance of associative semantic networks in short-term memory. PMID:21186910

Tehan, Gerald

2010-12-01

472

Weighted-traffic-network-based geographic profiling for serial crime location prediction  

NASA Astrophysics Data System (ADS)

Geographic profiling plays a significant role in serial crime detection nowadays, in which Rossmo's formula is applied for future crime location prediction. However, the limited accuracy and demanding for vast data have largely impeded the efficiency of this technology. In this letter, a traffic network is introduced to geographic profiling. The problem is remodeled with weighted traffic network and the original Euclidean distance is replaced by the shortest path between nodes for better location prediction. A serial crime case is used to validate the correctness, efficiency and robustness of the proposed method. The main contributions of this letter can be concluded as follows: 1) the proposed model displays a higher accuracy and is less dependent on crime data; 2) strong robustness is testified by sensitive analysis, i.e. the developed model can produce an accurate prediction based on somewhat inaccurate former crime data; 3) further application in counter-terrorism is put forward with some adjustments.

Qian, Cheng; Wang, Yubo; Cao, Jinde; Lu, Jianquan; Kurths, Jürgen

2011-03-01

473

Hill-type muscle model with serial damping and eccentric force-velocity relation.  

PubMed

Hill-type muscle models are commonly used in biomechanical simulations to predict passive and active muscle forces. Here, a model is presented which consists of four elements: a contractile element with force-length and force-velocity relations for concentric and eccentric contractions, a parallel elastic element, a series elastic element, and a serial damping element. With this, it combines previously published effects relevant for muscular contraction, i.e. serial damping and eccentric force-velocity relation. The model is exemplarily applied to arm movements. The more realistic representation of the eccentric force-velocity relation results in human-like elbow-joint flexion. The model is provided as ready to use Matlab and Simulink code. PMID:24612719

Haeufle, D F B; Günther, M; Bayer, A; Schmitt, S

2014-04-11

474

Effects of temporal stimuli in the acquisition of a serial tracking task  

PubMed Central

This study investigated the effects of temporal stimuli on qualitative responses during the acquisition of a serial tracking task. One hundred and twenty young adult men performed 100 trials of a tracking task that consisted of touching six response keys in a given sequence in response to flashing light-emitting diodes in order to identify and learn the serial pattern. Six experimental groups were created with diverse inter stimuli intervals (ISI): G1: ISI = 300 ms; G2: ISI = 400 ms; G3: ISI = 500 ms; G4: ISI = 600 ms; G5: ISI = 700 ms; and G6: ISI = 800 ms. Performance was assessed by means of four types of responses: omission, error, correct, and anticipatory responses. The results showed differential effects of temporal stimulus uncertainty in the hierarchy of responses as the learning course progressed. PMID:22888279

Cattuzzo, Maria Teresa; Tani, Go

2012-01-01

475

Cross-cultural comparison of two serial sexual murder series in Italy and the United States.  

PubMed

There have been few documented comparisons of serial murder cases committed in the United States with cases occurring internationally. The authors contrasted two unique serial murder series: one in Italy and one in the United States by examining the details of both series, including the M.O., motivation, crime scene interactions, sexual acts performed, and the general backgrounds of both offenders. The comparison revealed a number of similarities. Both offenders specifically targeted elderly women, who were attacked in their residences. The two series involved sexually motivated crimes, although the sexual interactions were different. Both offenders stole objects from their victims after the murders and each kept newspaper accounts of their crimes. In addition, both offenders claimed to have abusive upbringings, including sexual abuse. PMID:20487145

Morton, Robert J; Campobasso, Carlo P; McNamara, James J; Colonna, Massimo; Carabellese, Felice; Grattagliano, Ignazio; Catanesi, Roberto; Lawrence, Jennifer M

2010-07-01

476

Computerized method of lesion volume quantitation in multiple sclerosis: error of serial studies.  

PubMed

This study was designed to evaluate a potentially important source of error in T2-hyperintense lesion measurement unique to longitudinal multiple sclerosis treatment trials that would not be detected by the standard intraobserver and interobserver error analyses. The effect of this "error of serial studies" was tested by using the standard-of-reference manual-outlining approach and a modified bi-feature space (statistical) approach applied to a database of five consecutive patients. To simulate the conditions of a longitudinal treatment trial, each patient had immediate repeat MR studies of the brain with imperfect head repositioning. The study hypothesis was confirmed that with an improved quantitative methodology, the "error of serial studies" (interseries error) would exceed the intraobserver error. PMID:9090427

Simon, J H; Scherzinger, A; Raff, U; Li, X

1997-03-01

477

[Current status of serial sialography and sialoscintigraphy in the diagnosis of salivary gland diseases].  

PubMed

Sialographic investigation of enlarged salivary glands contribute to the important decision whether a secretion blockage is caused by a stone, chronic inflammation, sialoadenosis, or a tumour. The results of sialographic investigations have been much improved by the method described by Brands and Schnepper (1967) of specific serial sialography using a single-shot and fast-repeating camera, under fluoroscopic control. The success rate of the sialographic diagnosis on 141 patients in the ENT Department of Saarland University Hospital was 80%. The fact that in four cases spaces, occupying lesions were falsely interpreted or undetected leads to the conclusion that where a tumour is suspected negative sialography should be followed by further diagnostic steps. Scintigraphy of the salivary glands with 4 mCi 99mTechnetium Pertechnetate produces extra information which clearly increases diagnostic accuracy. However, experience to date shows that it is not an alternative to serial sialography but rather a supporting diagnostic method. PMID:6086552

Schätzle, W; Wilhelm, H J

1984-05-01

478

Parallel processing data network of master and slave transputers controlled by a serial control network  

DOEpatents

The present device provides for a dynamically configurable communication network having a multi-processor parallel processing system having a serial communication network and a high speed parallel communication network. The serial communication network is used to disseminate commands from a master processor to a plurality of slave processors to effect communication protocol, to control transmission of high density data among nodes and to monitor each slave processor`s status. The high speed parallel processing network is used to effect the transmission of high density data among nodes in the parallel processing system. Each node comprises a transputer, a digital signal processor, a parallel transfer controller, and two three-port memory devices. A communication switch within each node connects it to a fast parallel hardware channel through which all high density data arrives or leaves the node. 6 figs.

Crosetto, D.B.

1996-12-31

479

A case-comparison study of automatic document classification utilizing both serial and parallel approaches  

NASA Astrophysics Data System (ADS)

A well-known problem faced by any organization nowadays is the high volume of data that is available and the required process to transform this volume into differential information. In this study, a case-comparison study of automatic document classification (ADC) approach is presented, utilizing both serial and parallel paradigms. The serial approach was implemented by adopting the RapidMiner software tool, which is recognized as the worldleading open-source system for data mining. On the other hand, considering the MapReduce programming model, the Hadoop software environment has been used. The main goal of this case-comparison study is to exploit differences between these two paradigms, especially when large volumes of data such as Web text documents are utilized to build a category database. In the literature, many studies point out that distributed processing in unstructured documents have been yielding efficient results in utilizing Hadoop. Results from our research indicate a threshold to such efficiency.

Wilges, B.; Bastos, R. C.; Mateus, G. P.; Dantas, M. A. R.

2014-10-01

480

Detecting and Remembering Simultaneous Pictures in a Rapid Serial Visual Presentation  

PubMed Central

Viewers can easily spot a target picture in a rapid serial visual presentation (RSVP), but can they do so if more than 1 picture is presented simultaneously? Up to 4 pictures were presented on each RSVP frame, for 240 to 720 ms/frame. In a detection task, the target was verbally specified before each trial (e.g., man with violin); in a memory task, recognition was tested after each sequence. Target detection was much better than recognition memory, but in both tasks the more pictures on the frame, the lower the performance. When the presentation duration was set at 160 ms with a variable interframe interval such that the total times were the same as in the initial experiments, the results were similar. The results suggest that visual processing occurs in 2 stages: fast, global processing of all pictures in Stage 1 (usually sufficient for detection) and slower, serial processing in Stage 2 (usually necessary for subsequent memory). PMID:19170468

Potter, Mary C.; Fox, Laura F.

2009-01-01

481

Parallel and serial variational inequality decomposition algorithms for multicommodity market equilibrium problems  

SciTech Connect

The authors have applied parallel and serial variational inequality (VI) diagonal decomposition algorithms to large-scale multicommodity market equilibrium problems. These decomposition algorithms resolve the VI problems into single commodity problems, which are then solved as quadratic programming problems. The algorithms are implemented on an IBM 3090-600E, and randomly generated linear and nonlinear problems with as many as 100 markets and 12 commodities are solved. The computational results demonstrate that the parallel diagonal decomposition scheme is amenable to parallelization. This is the first time that multicommodity equilibrium problems of this scale and level of generality have been solved. Furthermore, this is the first study to compare the efficiencies of parallel and serial VI decomposition algorithms. Although the authors have selected as a prototype an equilibrium problem in economics, virtually any equilibrium problem can be formulated and studied as a variational inequality problem. Hence, their results are not limited to applications in economics and operations research.

Nagurney, A.; Kim, D.S.

1989-01-01

482

Age-Related Differences in Immediate Serial Recall: Dissociating Chunk Formation and Capacity  

PubMed Central

We assessed the impact of two hypothesized mechanisms leading to the impaired memory performance of older adults in an immediate serial recall task: decreased temporary information storage in a capacity-limited mechanism such as the focus of attention, and a deficit in binding together different components into cohesive chunks. Using a method in which paired associations between words were taught to varying levels to allow an identification of multiword chunks (Cowan, Chen, & Rouder, 2004), we found that older adults recalled considerably fewer chunks and, on the average, smaller chunks than young adults. Their performance was fairly well simulated by dividing attention in younger adults, unlike what is found for long-term associative learning. Paired-associate knowledge may be used in an implicit manner in serial recall, given that younger adults under divided attention and older adults use it well despite the relatively small chunk capacities displayed by these groups. PMID:17848030

Naveh-Benjamin, Moshe; Cowan, Nelson; Kilb, Angela; Chen, Zhijian

2006-01-01

483

Application of three-dimensional digital image processing for reconstruction of microstructural volume from serial sections  

SciTech Connect

Three-dimensional digital image processing is useful for reconstruction of microstructural volume from a stack of serial sections. Application of this technique is demonstrated via reconstruction of a volume segment of the liquid-phase sintered microstructure of a tungsten heavy alloy processed in the microgravity environment of NASA's space shuttle, Columbia. Ninety serial sections (approximately one micrometer apart) were used for reconstruction of the three-dimensional microstructure. The three-dimensional microstructural reconstruction clearly revealed that the tungsten grains are almost completely connected in three-dimensional space. Both the matrix and the grains are topologically co-continuous, although the alloy was liquid-phase sintered in microgravity. Therefore, absence of gravity did not produced a microstructure consisting of discrete isolated W grains uniformly dispersed in the liquid Ni-Fe alloy matrix at the sintering temperature.

Tewari, A.; Gokhale, A.M.

2000-03-01

484

Serial or Parallel? Using Depth-of-Processing to Examine Attention Allocation During Reading  

PubMed Central

This paper presents an experiment investigating attention allocation in four tasks requiring varied degrees of lexical processing of 1-4 simultaneously displayed words. Response times and eye movements were only modestly affected by the number of words in the asterisk-detection task but increased markedly with the number of words in the letter-detection, rhyme-judgment, and semantic-judgment tasks, suggesting that attention may not be serial for tasks that do not require significant lexical processing (e.g., detecting visual features), but is approximately serial for tasks that do (e.g., retrieving word meanings). The implications of these results for models of readers’ eye movements are discussed. PMID:18602657

Reichle, Erik D.; Vanyukov, Polina M.; Laurent, Patryk A.; Warren, Tessa

2008-01-01

485

Numerical analysis and system optimization for 100 Gbit/s carrier Ethernet serial modulation formats  

NASA Astrophysics Data System (ADS)

The performance of various modulation schemes for 100 Gbit/s single-channel serial transmission is investigated by means of numerical simulations. Different ASK and PSK modulation formats are compared in terms of total system reach for a 10 -9 BER requirement. RZ-DQPSK format with a 1920 km reach, without FEC and without the support of additional Raman amplification, outperforms all the other schemes including 10 × 10 Gbit/s NRZ DWDM inverse multiplexing.

Chaouch, H.; Gonschior, C.; Klein, K.-F.; Vorbeck, S.; Schneiders, M.; Weiershausen, W.; Küppers, F.

2010-06-01

486

Real-Time Manipulation of a Hybrid Serial-and-Parallel-Driven Redundant Industrial Manipulator  

Microsoft Academic Search

The real-time implementation of path planning, trajectory generation, and servo control for manipulation of the prototype UPSarm are presented in this paper. The prototype UPSarm, which is primarily designed for studying the feasibility of loading packages inside a trailer, is a ten degree-of-freedom hybrid serial-and-parallel-driven redundant robot manipulator. The direct, forward, inverse, and indirect kinematic solutions of the UPSarm using

Harry H. Cheng

1993-01-01

487

USE OF SERIAL SECTIONS TO DELINEATE THE STRUCTURE OF PORTHETRIA DISPAR VIRUS IN THE ELECTRON MICROSCOPE  

PubMed Central

Consecutive serial sections of polyhedra obtained from gipsy moth larvae infected with P. dispar virus revealed bundles of viral rods scattered and oriented at random within the polyhedral body. Each bundle was entirely surrounded by a dense, sharply defined membrane. The rods measured 18 to 22 mµ in diameter and averaged 280 mµ in length. No spherical viral particles were encountered. The effects of variable compression and periodic distortion of the sections on the appearance of the virus are discussed. PMID:13295308

Morgan, Councilman; Bergold, G. H.; Rose, Harry M.

1956-01-01

488

Research of serial communication system based on C8051F020 singlechip  

Microsoft Academic Search

The paper introduces the characteristics of the C8051F series' singlechip, and designs the hardware circuit and software communication procedure of the asynchronous serial communication system based on the C8051F020 singlechip. Then the paper describes the problems which must be paid attention to in the process of design. The practices show that the structure of this system is simple, configuration is

Ling Xu; Zhen Chen; Shi-lei Zhang

2010-01-01

489

Developing creativity in tourist experiences: A solution to the serial reproduction of culture?  

Microsoft Academic Search

As culture is increasingly utilised as a means of social and economic development,the cultural tourism market is being flooded with new attractions,cultural routes and heritage centres. However,many consumers,tired of encountering the serial reproduction of culture in different destinations are searching for alternatives. The rise of skilled consumption,the importance of identity formation and the acquisition of cultural capital in (post)modern society

Greg Richardsa; Julie Wilson

2005-01-01

490

Bandpass filter of serial configuration with two finite transmission zeros using LTCC technology  

Microsoft Academic Search

This study proposes a second-order bandpass filter of serial configuration. The filter schema incorporates a grounding capacitor, connecting the two conventional parallel LC resonators with the ground, to provide two finite transmission zeros. The impedance matrix and graphical solutions describe proposed filter's operation principle. To demonstrate the proposed filter schema, two bandpass filters, with center frequencies of 2.44 and 4.8

Chun-Fu Chang; Shyh-Jong Chung

2005-01-01

491

Detergent screening of a G-protein-coupled receptor using serial and array biosensor technologies  

Microsoft Academic Search

We describe the benefits and limitations of two biosensor approaches for screening solubilization conditions for G-protein-coupled receptors (GPCRs). Assays designed for a serial processing instrument (Biacore 2000\\/3000\\/T100) and an array platform (Biacore Flexchip) were used to examine how effectively 96 different detergents solubilized the chemokine receptor CCR5 while maintaining its binding activity for a conformationally sensitive Fab (2D7). Using the

Rebecca L. Rich; Adam R. Miles; Bruce K. Gale; David G. Myszka

2009-01-01

492

Transmit pre-emphasis for high-speed time-division-multiplexed serial-link transceiver  

Microsoft Academic Search

Time division multiplexing (TDM) must be employed in multi-Gb\\/s transceivers in order to overcome onchip clock frequency limitations. This paper describes a transmit pre-emphasis filter for a multi-level transceiver making use of TDM. The possible applications of such a transceiver include serial links and chip-to-chip communication. The requirement of very low probability of error in the absence of coding, and

V. Stojanovic; G. Ginis; M. A. Horowitz

2002-01-01

493

AN AREA EFFICIENT, SCALABLE, HIGH SPEED SERIAL FULL MESH SWITCH FABRIC DESIGN FOR FPGA  

Microsoft Academic Search

The integration into FPGA of high-speed serial IO blocks enables the creation of flexible switching solutions that scale to meet customer requirements in a manner not cost-effective in standard products. This paper describes a Mesh Fabric switch architecture available for the Xilinx Virtex-II Pro family of devices. The design provides a configurable mesh interconnect for line cards that can be

Hamish Fallside

494

Single and Multi-objective Evolutionary Algorithms for the Coordination of Serial Manufacturing Operations  

Microsoft Academic Search

This paper focuses on a typical problem arising in serial production, where two consecutive departments must sequence their\\u000a internal work, each taking into account the requirements of the other one. Even if the considered problem is inherently multi-objective,\\u000a to date the only heuristic approaches dealing with this problem use single-objective formulations, and also require specific\\u000a assumptions on the objective function,

David Naso; Biagio Turchiano; Carlo Meloni

2006-01-01

495

Dynamically Programmable DRU for High-Speed Serial I\\/O  

Microsoft Academic Search

Multi-service optical networks today require the availability of transceivers that can operate over a wide range of input data rates. High-speed serial I\\/O has a native lower limit for operating data rates, preventing easy interfacing to low-speed client signals. The non-integer data recovery unit (NI-DRU) presented in this application note is specifically designed for RocketIO™ GTP and GTX transceivers in

Paolo Novellini; Giovanni Guasti

2010-01-01

496

Semantic Network Language Generation based on a Semantic Networks Serialization Grammar  

Microsoft Academic Search

This paper studies the Semantic Network Language Generation (SNLG), which is used to generate natural language from the information\\u000a represented as Semantic Networks (SN). After a brief analysis of the challenges faced by SNLG, a Semantic Network Serialization\\u000a Grammar (SNSG) is proposed to generate natural language from semantic networks. The SNSG is constituted by four components:\\u000a (a) a semantic pattern

Yintang Dai; Shiyong Zhang; Jidong Chen; Tianyuan Chen; Wei Zhang

2010-01-01

497

Serial Observations after High Dose Talc Slurry in the Rabbit Model for Pleurodesis  

Microsoft Academic Search

.   The mechanisms leading to a pleurodesis after the intrapleural injection of a sclerosing agent are not completely understood.\\u000a The purpose of the present study was to make serial observations over 28 days on the pleural fluid findings and the gross\\u000a and microscopic changes in the pleura after talc slurry administered intrapleurally at a high dose. Sixty-six rabbits received\\u000a 400

C. Xie; L. R. Teixeira; N.-S. Wang; J. P. McGovern; R. W. Light

1998-01-01

498

An FPGA Application with High Speed Serial Transceiver Running at Sub-nominal Rate  

Microsoft Academic Search

We describe an implementation of the physical layer circuit for 100Mb\\/s optical Ethernet using an FPGA device with embedded high-speed serial transceivers. The design is the foundation for implementing a dual-speed 100\\/1000 Mb\\/s Ethernet system in which all components except the optical ones are implemented in an FPGA. The low-speed mode is outside the transceiver's nominal range, so the PLL

Dusan Suvakovic; Ilija Hadzic

2005-01-01

499

Serial renal biopsies in three girls with tubulointerstitial nephritis and uveitis syndrome  

Microsoft Academic Search

Tubulointerstitial nephritis and uveitis (TINU) syndrome is considered to have a good prognosis even without any immunosuppressive\\u000a therapy, although there is no histological evidence to support this. The objective of this study was to evaluate, retrospectively,\\u000a serial renal biopsy findings in three girls with TINU syndrome who were treated with prednisolone. At presentation, all patients\\u000a had significantly elevated urinary ?2-microglobulin

Takeshi Yanagihara; Hiroshi Kitamura; Kaoru Aki; Nao Kuroda; Yoshitaka Fukunaga

2009-01-01

500

Covert signs of expectancy in serial reaction time tasks revealed by event-related potentials  

Microsoft Academic Search

Choice reaction time is strongly determined by the sequence of preceding stimuli. With long response-stimulus intervals (RSIs),\\u000a a cost-benefit pattern is observed, which has been related to expectancy, whereas with short RSIs a benefit-only pattern emerges,\\u000a possibly because of automatic facilitation. In the present study, event-related potentials were recorded while subjects performed\\u000a serial choice responses to visual and auditory stimuli

Werner Sommer; Hartmut Leuthold; Eric Soetens

1999-01-01