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1

ISS EPS Orbital Replacement Unit Block Diagrams  

NASA Technical Reports Server (NTRS)

The attached documents are being provided to Switching Power Magazine for information purposes. This magazine is writing a feature article on the International Space Station Electrical Power System, focusing on the switching power processors. These units include the DC-DC Converter Unit (DDCU), the Bi-directional Charge/Discharge Unit (BCDU), and the Sequential Shunt Unit (SSU). These diagrams are high-level schematics/block diagrams depicting the overall functionality of each unit.

Schmitz, Gregory V.

2001-01-01

2

Spectrum Analyzer Basics Simplified Block Diagram  

E-print Network

Spectrum Analyzer Basics Simplified Block Diagram Major Controls Frequency Sweep Set Start { Hit MKR-> in the MARKER/LINE CURSOR group. { Use the softkeys to move the marker to the maximum and the CONTmode (it sometimes gets confused and stuck in a single-sweep mode) { If the analyzer complains about

Kuhn, William B.

3

On-Line Simulation of Block-Diagram Systems  

Microsoft Academic Search

This paper is concerned with a general approach to the on-line simulation of block-diagram systems. These systems may be analog, digital, or hybrid; memory or memoryless; explicit or implicit (i.e., possessing loops of memoryless elements); vector or scalar; or of a more specialized nature, such as dynamic systems with integrators as memory elements; and simulation may be conducted in one

M. L. Dertouzos; M. E. Kaliski; K. P. Polzen

1969-01-01

4

Process Flow Diagrams for Training and Operations  

NASA Astrophysics Data System (ADS)

This paper focuses on the use of process flow diagrams for training first responders who execute search and seizure warrants at electronic crime scenes. A generic process flow framework is presented, and the design goals and layout characteristics of process flow diagrams are discussed. An evaluation of the process flow diagrams used in training courses indicates that they are beneficial to first responders performing searches and seizures, and they speed up investigations, including those conducted by experienced personnel.

Venter, Jacobus

5

Software safety analysis of function block diagrams using fault trees , Junbeom Yoob,*, Sungdeok Chab  

E-print Network

Software safety analysis of function block diagrams using fault trees Younju Oha , Junbeom Yoob propose a fault tree analysis technique on Function Block Diagrams (FBDs) which is one of the most widely) for a nuclear power plant in South Korea. Our approach to fault tree analysis, which combines fault

6

Flight control systems properties and problems. Volume 2: Block diagram compendium  

NASA Technical Reports Server (NTRS)

A compendium of stability augmentation system and autopilot block diagrams is presented. Descriptive materials for 48 different types of aircraft systems are provided. A broad representation of the many mechanical approaches which have been used for aircraft control is developed.

Johnston, D. E.

1975-01-01

7

Recognition and processing of logic diagrams  

NASA Astrophysics Data System (ADS)

In this paper we present a vision system that is capable of interpreting schematic logic diagrams, i.e. determine the output as a logic function of the inputs. The system is composed of a number of modules each designed to perform a specific subtask. Each module bears a minor contribution in the form of a new mixture of known algorithms or extensions to handle actual real life image imperfections which researchers tend to ignore when they develop their theoretical foundations. The main contribution, thus, is not in any individual module, it is rather in their integration to achieve the target job. The system is organized more or less in a classical fashion. Aside from the image acquisition and preprocessing modules, interesting modules include: the segmenter, the identifier, the connector and the grapher. A good segmentation output is one reason for the success of the presented system. Several novelties exist in the presented approach. Following segmentation the type of each logic gate is determined and its topological connectivity. The logic diagram is then transformed to a directed acyclic graph in which the final node is the output logic gate. The logic function is then determined by backtracking techniques. The system is not only aimed at recognition applications. In fact its main usage may be to target other processing applications such as storage compression and graphics modification and manipulation of the diagram as is explained.

Darwish, Ahmed M.; Bashandy, Ahmed R.

1996-03-01

8

Pressure processable block copolymers: Baroplastics  

NASA Astrophysics Data System (ADS)

There has been great interest in recent years in the effect of pressure on the miscibility of polymer pairs; this effect is present in the displacement of the order/disorder temperature of block copolymers, which has been shown to be significant in some cases. In an attempt to exploit this effect, we have synthesized block copolymers that consist of one rubbery block and one glassy block, chosen to present enhanced miscibility under pressure. These materials can undergo an order/disorder transition with pressure that reflects macroscopically in a radical change in the material's rheological behavior, going from a solid (ordered) state to a liquid (disordered) state by the application of pressure. Such materials, termed baroplastics, can be melt-processed at temperatures well below the glass transition of the glassy component. For example, polystyrene-containing baroplastics were compression molded at room temperature. Mechanical property measurements on baroplastics as-processed and after multiple recycles showed these materials to exhibit excellent recyclability, with no apparent processing-related degradation. TEM and SAXS studies of the processed baroplastics were conducted to elucidate their low-temperature post-processing morphology.

Gonzalez, Juan; Acar, Metin H.; Mayes, Anne M.

2003-03-01

9

The use of a block diagram simulation language for rapid model prototyping  

NASA Technical Reports Server (NTRS)

The research performed this summer focussed on the development of a predictive model for the loading of liquid oxygen (LO2) into the external tank (ET) of the shuttle prior to launch. A predictive model can greatly aid the operational personnel since instrumentation aboard the orbiter and ET is limited due to weight constraints. The model, which focuses primarily on the orbiter section of the system was developed using a block diagram based simulation language known as VisSim. Simulations were run on LO2 loading data for shuttle flights STS50 and STS55 and the model was demonstrated to accurately predict the sensor data recorded for these flights. As a consequence of the simulation results, it can be concluded that the software tool can be very useful for rapid prototyping of complex models.

Whitlow, Jonathan E.

1995-01-01

10

The Use of a Block Diagram Simulation Language for Rapid Model Prototyping  

NASA Technical Reports Server (NTRS)

The research performed this summer was a continuation of work performed during the 1995 NASA/ASEE Summer Fellowship. The focus of the work was to expand previously generated predictive models for liquid oxygen (LOX) loading into the external fuel tank of the shuttle. The models which were developed using a block diagram simulation language known as VisSim, were evaluated on numerous shuttle flights and found to well in most cases. Once the models were refined and validated, the predictive methods were integrated into the existing Rockwell software propulsion advisory tool (PAT). Although time was not sufficient to completely integrate the models developed into PAT, the ability to predict flows and pressures in the orbiter section and graphically display the results was accomplished.

Whitlow, Johnathan E.; Engrand, Peter

1996-01-01

11

Phase diagrams of block copolymer melts by dissipative particle dynamics simulations  

NASA Astrophysics Data System (ADS)

Phase diagrams for monodisperse and polydisperse diblock copolymer melts and a random multiblock copolymer melt are constructed using dissipative particle dynamics simulations. A thorough visual analysis and calculation of the static structure factor in several hundreds of points at each of the diagrams prove the ability of mesoscopic molecular dynamics to predict the phase behavior of polymer systems as effectively as the self-consistent field-theory and Monte Carlo simulations do. It is demonstrated that the order-disorder transition (ODT) curve for monodisperse diblocks can be precisely located by a spike in the dependence of the mean square pressure fluctuation on ?N, where ? is the Flory-Huggins parameter and N is the chain length. For two other copolymer types, the continuous ODTs are observed. Large polydispersity of both blocks obeying the Flory distribution in length does not shift the ODT curve but considerably narrows the domains of the cylindrical and lamellar phases partially replacing them with the wormlike micelle and perforated lamellar phases, respectively. Instead of the pure 3d-bicontinuous phase in monodisperse diblocks, which could be identified as the gyroid, a coexistence of the 3d phase and cylindrical micelles is detected in polydisperse diblocks. The lamellar domain spacing D in monodisperse diblocks follows the strong-segregation theory prediction, D/N1/2 ˜ (?N)1/6, whereas in polydisperse diblocks it is almost independent of ?N at ?N < 100. Completely random multiblock copolymers cannot form ordered microstructures other than lamellas at any composition.

Gavrilov, Alexey A.; Kudryavtsev, Yaroslav V.; Chertovich, Alexander V.

2013-12-01

12

Rock magnetic properties estimated from coercivity - blocking temperature diagram: application to recent volcanic rocks  

NASA Astrophysics Data System (ADS)

Magnetic properties of ferromagnetic minerals generally depend on their chemical composition, crystal structure, size, and shape. In the usual paleomagnetic study, we use a bulk sample which is the assemblage of magnetic minerals showing broad distributions of various magnetic properties. Microscopic and Curie-point observations of the bulk sample enable us to identify the constituent magnetic minerals, while other measurements, for example, stepwise thermal and/or alternating field demagnetizations (ThD, AFD) make it possible to estimate size, shape and domain state of the constituent magnetic grains. However, estimation based on stepwise demagnetizations has a limitation that magnetic grains with the same coercivity Hc (or blocking temperature Tb) can be identified as the single population even though they could have different size and shape. Dunlop and West (1969) carried out mapping of grain size and coercivity (Hc) using pTRM. However, it is considered that their mapping method is basically applicable to natural rocks containing only SD grains, since the grain sizes are estimated on the basis of the single domain theory (Neel, 1949). In addition, it is impossible to check thermal alteration due to laboratory heating in their experiment. In the present study we propose a new experimental method which makes it possible to estimate distribution of size and shape of magnetic minerals in a bulk sample. The present method is composed of simple procedures: (1) imparting ARM to a bulk sample, (2) ThD at a certain temperature, (3) stepwise AFD on the remaining ARM, (4) repeating the steps (1) ~ (3) with ThD at elevating temperatures up to the Curie temperature of the sample. After completion of the whole procedures, ARM spectra are calculated and mapped on the HC-Tb plane (hereafter called HC-Tb diagram). We analyze the Hc-Tb diagrams as follows: (1) For uniaxial SD populations, theoretical curve for a certain grain size (or shape anisotropy) is drawn on the Hc-Tb diagram. The curves are calculated using the single domain theory, since coercivity and blocking temperature of uniaxial SD grains can be expressed as a function of size and shape. (2) Boundary between SD and MD grains are calculated and drawn on the Hc-Tb diagram according to the theory by Butler and Banerjee (1975). (3) Theoretical predictions by (1) and (2) are compared with the obtained ARM spectra to estimate quantitive distribution of size, shape and domain state of magnetic grains in the sample. This mapping method has been applied to three samples: Hawaiian basaltic lava extruded in 1995, Ueno basaltic lava formed during Matsuyama chron, and Oshima basaltic lava extruded in 1986. We will discuss physical states of magnetic grains (size, shape, domain state, etc.) and their possible origins.

Terada, T.; Sato, M.; Mochizuki, N.; Yamamoto, Y.; Tsunakawa, H.

2013-12-01

13

What can we learn by comparing students' diagram-construction processes with the mathematical conceptions inferred from their explanations with completed diagrams?  

NASA Astrophysics Data System (ADS)

Despite recent research interest in student-created diagrams, little research has systematically investigated students' diagram- construction processes, meaning the order and manner in which students create markings as they physically generate diagrams. In this study, we characterize the various processes students use to create diagrams that represent a quadratic motion situation involving increasing speed, and we explore how these diagram-construction processes are related to students' conceptions of speed as inferred from their explanations with their completed diagrams. Previous literature suggests contrasting predictions regarding whether or not students' diagram-construction processes are closely related (from our perspective as researchers) to students' inferred conceptions. We see the study as having value for research and practice by raising new questions related to diagram-construction processes, pointing to the potential formative assessment value of attending to diagram-construction processes, and demonstrating the need for the development of theory to explain the relationships identified by this study.

Lobato, Joanne; Hohensee, Charles; Diamond, Jaime Marie

2014-09-01

14

Observed Human Errors in Interpreting 3D visualizations: implications for Teaching Students how to Comprehend Geological Block Diagrams  

NASA Astrophysics Data System (ADS)

Block diagrams are commonly used to communicate three dimensional geological structures and other phenomena relevant to geological science (e.g., water bodies in the ocean). However, several recent studies have suggested that these 3D visualizations create difficulties for individuals with low to moderate spatial abilities. We have therefore initiated a series of studies to understand what it is about the 3D structures that make them so difficult for some people and also to determine if we can improve people’s understanding of these structures through web-based training not related to geology or other underlying information. Our first study examined what mistakes subjects made in a set of 3D block diagrams designed to represent progressively more difficult internal structures. Each block was shown bisected by a plane either perpendicular or at an angle to the block sides. Five low to medium spatial subjects were asked to draw the features that would appear on the bisecting plane. They were asked to talk aloud as they solved the problem. Each session was videotaped. Using the time it took subjects to solve the problems, the subject verbalizations of their problem solving and the drawings that were found to be in error, we have been able to find common patterns in the difficulties the subjects had with the diagrams. We have used these patterns to generate a set of strategies the subjects used in solving the problems. From these strategies, we are developing methods of teaching. A problem found in earlier work on geology structures was not observed in our study, that is, one of subjects failing to recognize the 2D representation of the block as 3D and drawing the cross-section as a combined version of the visible faces of the object. We attribute this to our experiment introduction, suggesting that even this simple training needs to be carried out with students encountering 3D block diagrams. Other problems subjects had included difficulties in perceptually recognizing variations in layer thicknesses, difficulties in recognizing an internal structure from the visible cues on the block walls, difficulties in mentally constructing objects and intersections that were not perpendicular, and difficulties in keeping track of the number of folds of a layer, and thus, the number of intersections of the layer with the bisecting plane. All of these problems suggest that web-based games giving mass practice with these variations in block diagram representations are likely to give any person appropriate skills in their interpretation. The time to complete the drawings and the errors in the drawings were also correlated with quantifiable properties of the diagrams, e.g., number of layers, number of folds in the layers, angle of bisection of the plane, etc. These will be used in further research to organize the training from easy to hard problems following what is known already about mass practice and developing abstracted skill sets. The plan is to also make the training adaptive, that is, to provide practice in those areas where an individual user is having the most problems.

Bemis, K. G.; Pirl, E.; Chiang, J.; Tremaine, M.

2009-12-01

15

Process Technical Basis Documentation Diagram for a solid-waste processing facility  

SciTech Connect

The Process Technical Basis Documentation Diagram is for a solid-waste processing facility that could be designed to treat, package, and certify contact-handled mixed low-level waste for permanent disposal. The treatment processes include stabilization using cementitious materials and immobilization using a polymer material. The Diagram identifies several engineering/demonstration activities that would confirm the process selection and process design. An independent peer review was conducted at the request of Westinghouse Hanford Company to determine the technical adequacy of the technical approach for waste form development. The peer review panel provided comments and identified documents that it felt were needed in the Diagram as precedence for Title I design. The Diagram is a visual tool to identify traceable documentation of key activities, including those documents suggested by the peer review, and to show how they relate to each other. The Diagram is divided into three sections: (1) the Facility section, which contains documents pertaining to the facility design, (2) the Process Demonstration section, which contains documents pertaining to the process engineering/demonstration work, and 3) the Regulatory section, which contains documents describing the compliance strategy for each acceptance requirement for each feed type, and how this strategy will be implemented.

Benar, C.J.; Petersen, C.A.

1994-02-01

16

Query Processing for Probabilistic State Diagrams Describing Multiple Robot Navigation in an Indoor Environment  

SciTech Connect

This paper describes the syntax and semantics of multi-level state diagrams to support probabilistic behavior of cooperating robots. The techniques are presented to analyze these diagrams by querying combined robots behaviors. It is shown how to use state abstraction and transition abstraction to create, verify and process large probabilistic state diagrams.

Czejdo, Bogdan [ORNL; Bhattacharya, Sambit [North Carolina Fayetteville State University; Ferragut, Erik M [ORNL

2012-01-01

17

Lifting business process diagrams to 2.5 dimensions  

NASA Astrophysics Data System (ADS)

In this work, we describe our visualization approach for business processes using 2.5 dimensional techniques (2.5D). The idea of 2.5D is to add the concept of layering to a two dimensional (2D) visualization. The layers are arranged in a three-dimensional display space. For the modeling of the business processes, we use the Business Process Modeling Notation (BPMN). The benefit of connecting BPMN with a 2.5D visualization is not only to obtain a more abstract view on the business process models but also to develop layering criteria that eventually increase readability of the BPMN model compared to 2D. We present a 2.5D Navigator for BPMN models that offers different perspectives for visualization. Therefore we also develop BPMN specific perspectives. The 2.5D Navigator combines the 2.5D approach with perspectives and allows free navigation in the three dimensional display space. We also demonstrate our tool and libraries used for implementation of the visualizations. The underlying general framework for 2.5D visualizations is explored and presented in a fashion that it can easily be used for different applications. Finally, an evaluation of our navigation tool demonstrates that we can achieve satisfying and aesthetic displays of diagrams stating BPMN models in 2.5D-visualizations.

Effinger, Philip; Spielmann, Johannes

2010-01-01

18

Phase diagram of the symbiotic two-species contact process  

NASA Astrophysics Data System (ADS)

We study the two-species symbiotic contact process, recently proposed by de Oliveira, Santos, and Dickman [Phys. Rev. E 86, 011121 (2012), 10.1103/PhysRevE.86.011121]. In this model, each site of a lattice may be vacant or host single individuals of species A and/or B. Individuals at sites with both species present interact in a symbiotic manner, having a reduced death rate ? <1. Otherwise, the dynamics follows the rules of the basic contact process, with individuals reproducing to vacant neighbor sites at rate ? and dying at a rate of unity. We determine the full phase diagram in the ?-? plane in one and two dimensions by means of exact numerical quasistationary distributions, cluster approximations, and Monte Carlo simulations. We also study the effects of asymmetric creation rates and diffusion of individuals. In two dimensions, for sufficiently strong symbiosis (i.e., small ?), the absorbing-state phase transition becomes discontinuous for diffusion rates D within a certain range. We report preliminary results on the critical surface and tricritical line in the ?-?-D space. Our results raise the possibility that strongly symbiotic associations of mobile species may be vulnerable to sudden extinction under increasingly adverse conditions.

de Oliveira, Marcelo Martins; Dickman, Ronald

2014-09-01

19

Applying state diagrams to food processing and development  

NASA Technical Reports Server (NTRS)

The physical state of food components affects their properties during processing, storage, and consumption. Removal of water by evaporation or by freezing often results in formation of an amorphous state (Parks et al., 1928; Troy and Sharp, 1930; Kauzmann, 1948; Bushill et al., 1965; White and Cakebread, 1966; Slade and Levine, 1991). Amorphous foods are also produced from carbohydrate melts by rapid cooling after extrusion or in the manufacturing of hard sugar candies and coatings (Herrington and Branfield, 1984). Formation of the amorphous state and its relation to equilibrium conditions are shown in Fig. 1 [see text]. The most important change, characteristic of the amorphous state, is noticed at the glass transition temperature (Tg), which involves transition from a solid "glassy" to a liquid-like "rubbery" state. The main consequence of glass transition is an increase of molecular mobility and free volume above Tg, which may result in physical and physico-chemical deteriorative changes (White and Cakebread, 1966; Slade and Levine, 1991). We have conducted studies on phase transitions of amorphous food materials and related Tg to composition, viscosity, stickiness, collapse, recrystallization, and ice formation. We have also proposed that some diffusion-limited deteriorative reactions are controlled by the physical state in the vicinity of Tg (Roos and Karel, 1990, 1991a, b, c). The results are summarized in this article, with state diagrams based on experimental and calculated data to characterize the relevant water content, temperature, and time-dependent phenomena of amorphous food components.

Roos, Y.; Karel, M.

1991-01-01

20

Interpreting Evolutionary Diagrams: When Topology and Process Conflict  

ERIC Educational Resources Information Center

The authors argue that some diagrams in biology textbooks and the popular press presented as depicting evolutionary relationships suggest an inappropriate (anagenic) conception of evolutionary history. The goal of this research was to provide baseline data that begin to document how college students conceptualize the evolutionary relationships…

Catley, Kefyn M.; Novick, Laura R.; Shade, Courtney K.

2010-01-01

21

BLOCK BOOTSTRAP THEORY FOR MULTIVARIATE INTEGRATED AND COINTEGRATED PROCESSES  

E-print Network

BLOCK BOOTSTRAP THEORY FOR MULTIVARIATE INTEGRATED AND COINTEGRATED PROCESSES CARSTEN JENTSCH of block bootstrap resampling schemes to multivariate integrated and cointegrated time series. It is proved that a multivariate, continuous-path block bootstrap scheme applied to a full rank integrated process, succeeds

Politis, Dimitris N.

22

Spent Nuclear Fuel (SNF) Project Canister Storage Building (CSB) Process Flow Diagram Mass Balance Calculations  

SciTech Connect

The purpose of these calculations is to develop the material balances for documentation of the Canister Storage Building (CSB) Process Flow Diagram (PFD) and future reference. The attached mass balances were prepared to support revision two of the PFD for the CSB. The calculations refer to diagram H-2-825869.

KLEM, M.J.

2000-05-11

23

Comparisons of block diagram and Markov method system reliability and mean time to failure results for constant and non-constant unit failure rates  

Microsoft Academic Search

This paper presents a comparison of system reliability and mean time to failure results obtained using two different methods (i.e. block diagram and Markov) for the same system with constant and non-constant unit failures rates. The device of stages approach is used to obtain the non-constant unit failure rate when using the Markov method.

B. S. Dhillon; N. Yang

1997-01-01

24

A Formal Verification Method of Function Block Diagram Kwang Yong Koh1  

E-print Network

control systems in chemical processing plants, nuclear power plants or traffic control systems [1 and list of I/O ports. The first part of a module defines I/O and data type of each port. Keyword input module. 2.2 Cadence SMV Cadence SMV is a model checker based on symbolic model checking technique. It can

Jee, Eunkyoung

25

FMEF Electrical single line diagram and panel schedule verification process  

Microsoft Academic Search

Since the FMEF did not have a mission, a formal drawing verification program was not developed, however, a verification process on essential electrical single line drawings and panel schedules was established to benefit the operations lock and tag program and to enhance the electrical safety culture of the facility. The purpose of this document is to provide a basis by

1998-01-01

26

The organization of intrinsic computation: complexity-entropy diagrams and the diversity of natural information processing.  

PubMed

Intrinsic computation refers to how dynamical systems store, structure, and transform historical and spatial information. By graphing a measure of structural complexity against a measure of randomness, complexity-entropy diagrams display the different kinds of intrinsic computation across an entire class of systems. Here, we use complexity-entropy diagrams to analyze intrinsic computation in a broad array of deterministic nonlinear and linear stochastic processes, including maps of the interval, cellular automata, and Ising spin systems in one and two dimensions, Markov chains, and probabilistic minimal finite-state machines. Since complexity-entropy diagrams are a function only of observed configurations, they can be used to compare systems without reference to system coordinates or parameters. It has been known for some time that in special cases complexity-entropy diagrams reveal that high degrees of information processing are associated with phase transitions in the underlying process space, the so-called "edge of chaos." Generally, though, complexity-entropy diagrams differ substantially in character, demonstrating a genuine diversity of distinct kinds of intrinsic computation. PMID:19123616

Feldman, David P; McTague, Carl S; Crutchfield, James P

2008-12-01

27

Improving the polishing process for Rockwell hardness test block  

E-print Network

Inefficiencies in a Rockwell hardness test block manufacturing process were analyzed. The polishing stage was identified to be the bottleneck with a high reworking rate. An understanding based on the physics of polishing ...

Imani Nejad, Mohammad

2009-01-01

28

Constructing a 3D structural block diagram of the Central Basin in Marmara Sea by means of bathymetric and seismic data  

NASA Astrophysics Data System (ADS)

In this study we made a comparative interpretation of multibeam bathymetric and seismic reflection data with different resolutions and penetration properties collected in the Central Basin of the Marmara Sea. Our main objectives were (i) to investigate and compare the active tectonic deformation observed on the sea bottom and within the uppermost sedimentary layers to that of the deep-seated deformation within the limits of resolution and penetration of the available geophysical data and (ii) to build a three-dimensional (3D) block diagram of the active tectonic and buried features by means of a sliced mapping technique. In this approach, we produced slice maps of the active and buried structural features at selected depths and then combined them to form a 3D structural block diagram. Motivation for our work was to produce a 3D structural diagram to derive a more detailed image of the structural features in the Central Basin where there is no available 3D seismic data. The observations from the bathymetry and seismic data and developed 3D diagram support the presence of a through-going strike-slip fault that forms a rotational depression zone against a right-stepping strike-slip faulting causing a pull-apart basin in the Central Depression zone.

Demirba?, Emin; Kurt, Hülya; Dü?ünür, Do?a; Sar?kavak, Kerim; Çetin, Suna

2007-12-01

29

Effect of Thermomechanical Processing on Forming Limit Diagrams Predicted by Neural Networks  

Microsoft Academic Search

In the present work, an artificial neural network (ANN) model was developed for predicting the effect of thermo-mechanical processing on the forming limit diagram (FLD) of low carbon steels. The model introduced here considers the content of carbon, the hot finishing temperature, the degree of cold work, the work hardening exponent, the initial yield stress and the ASTM grain size

K. Dehghani; A. Shafiei M; H. Naeimi

2008-01-01

30

Student Understanding Of The Physics And Mathematics Of Process Variables In P-V Diagrams  

E-print Network

Student Understanding Of The Physics And Mathematics Of Process Variables In P-V Diagrams Evan B on the paired questions shows evidence of isolated understanding of physics and mathematics. Some difficulties may affect understanding of physics concepts in thermodynamics. We have presented results

Maine, University of

31

Spent Nuclear Fuel (SNF) Project Multi Canister Overpack (MCO) Process Flow Diagram Mass Balance Calculations  

SciTech Connect

The purpose of this calculation document is to develop the bases for the material balances of the Multi-Canister Overpack (MCO) Level 1 Process Flow Diagram (PFD). The attached mass balances support revision two of the PFD for the MCO and provide future reference.

KLEM, M.J.

2000-09-08

32

Blocking and Dimer Processes on the Cayley Tree  

NASA Astrophysics Data System (ADS)

We show that the equilibrium distribution for the dimer process on the finite Cayley tree tends to a translation invariant limit as the size of the tree tends to infinity. The same is true for the blocking process except when there is a phase transition, in which case there are two limits, each a one-step translation of the other. We also find correlations for occupation probabilities.

Gouet, Raul; Sudbury, Aidan

2008-03-01

33

Melt processing and mechanical properties of polyolefin block copolymers  

NASA Astrophysics Data System (ADS)

This thesis addresses the mechanical properties and melt processing behavior of lamellae-forming polyolefin based block copolymers composed of poly(cyclohexylethylene) (C) and polyethylene (E). These materials display a variety of desirable physical properties, most notably, a significantly higher upper use temperature than polystyrene based block copolymers used in traditional thermoplastic elastomers and plastics. A comprehensive framework was developed to describe the toughness of C/E block copolymers having a wide range of chain architectures. Uniaxial tensile testing experiments revealed that the weight fraction of E chains confined between C domains (psiE) critically controls the elongation-to-break. A design parameter was thus identified to potentially predict the toughness of any hard-soft block copolymer system. CEC and CECEC block copolymers, and their blends were extruded through a capillary rheometer, and the resulting lamellar alignment was studied. Extrudates were found to possess mixed or perpendicular alignment of lamellae, in agreement with the previously established phenomenology from oscillatory shear experiments. CEC and CECEC extrudates displayed dramatically different surface properties. CECEC extrudates exhibited undesirable surface roughness, which was eliminated by adding just 20% CEC. Thus, an "optimum" CEC/CECEC blend composition window was identified that provides high toughness, without undesirable surface instabilities during extrusion. In the final part of the thesis, an experimental apparatus was designed and built to produce melt blown fibers on a laboratory scale. A number of polymers, including a CEC triblock, were extruded using a capillary rheometer and hot air streams were used to successfully attenuate the extrudate into sub-micron fibers. These results prove the potential of the melt blowing process to compete with electrospinning, which is currently the only continuous process to produce polymeric nanofibers.

Phatak, Alhad

34

Student Understanding of the Physics and Mathematics of Process Variables in P-V Diagrams  

NSDL National Science Digital Library

Students in an upper-level thermal physics course were asked to compare quantities related to the First Law of Thermodynamics along with similar mathematical questions devoid of all physical context. We report on a comparison of student responses to physics questions involving interpretation of ideal gas processes on P-V diagrams and to analogous mathematical qualitative questions about the signs of and comparisons between the magnitudes of various integrals. Student performance on individual questions combined with performance on the paired questions shows evidence of isolated understanding of physics and mathematics. Some difficulties are addressed by instruction.

Pollock, Evan B.; Thompson, John R.; Mountcastle, Donald B.

2009-06-24

35

Prediction of Forming Limit Diagrams for 22MnB5 in Hot Stamping Process  

NASA Astrophysics Data System (ADS)

Hot stamping of ultra-high strength steels possesses many superior characteristics over conventional room temperature forming process and is fairly attractive in improving strength and reducing weight of vehicle body product. However, the mechanical and failure behavior of hot stamping boron steel 22MnB5 are both strongly affected by strain hardening, temperature, strain rate, and microstructure. In this paper, the material yield and flow behavior of 22MnB5 within the temperature and strain rate range of hot stamping are described by an advanced anisotropic yield criterion combined with two different hardening laws. The elevated temperature forming limit diagram (ET-FLD) is constructed using the M-K theoretical analysis. The developed model was validated by comparing our predicted result with experimental data in the literature under isothermal conditions. Based on the verified model, the influence of temperature and strain rate on the forming limit curve for 22MnB5 steel under equilibrium isothermal condition are discussed. Furthermore, the transient forming limit diagram is developed by performing a transient forming process simulation under non-isothermal transient condition.

Li, Hongzhou; Wu, Xin; Li, Guangyao

2013-08-01

36

Venn diagrams  

NSDL National Science Digital Library

These online resources offer varied opportunities to work with Venn diagrams, one of many tools used in logic and reasoning. Their use is especially helpful in learning foundational notions of definition and set theory. One of the five Process Standards promoted by NCTM, Reasoning and Proof requires middle school students to sharpen such skills as they learn to develop mathematical argument.

National Science Digital Library (NSDL) Middle School Portal Staff

2008-03-10

37

The organization of intrinsic computation: Complexity-entropy diagrams and the diversity of natural information processing  

E-print Network

The organization of intrinsic computation: Complexity-entropy diagrams and the diversity of natural Shields Ave., Davis, California 95616, USA 4 DPMMS, Centre for Mathematical Sciences, University a measure of random- ness, complexity-entropy diagrams display the different kinds of intrinsic computation

Feldman, David P.

38

Object-process networks & object-process diagrams : implementation issues for oil exploration systems  

E-print Network

This thesis discusses different ways to increase the ability of OPN (Object-Process- Network), a system-architecture meta-language, to model complex systems and identify architectures to address those systems. It proposes ...

Rozenblum, Ziv

2007-01-01

39

Diblock copolymer phase diagram  

NSDL National Science Digital Library

Adaptation of the Matsen and Bates BCP phase diagram predicted using Mean-field Theory. * Matsen MW, Bates FS, ''http://pubs3.acs.org/acs/journals/doilookup?in_doi=10.1021/ma951138i Unifying weak- and strong-segregation block copolymer theories. Diblock copolymer phase diagram as calculated using Mean-field Theory by Matsen and Bates, where fA is the Block fraction, Ï is the Flory-Huggins Chi Parameter, and N is the length of the block.

Iacovella, Christopher R.

2006-11-20

40

Automation of process accountability flow diagrams at Los Alamos National Laboratory's Plutonium Facility  

SciTech Connect

Many industrial processes (including reprocessing activities; nuclear fuel fabrication; and material storage, measurement and transfer) make use of process flow diagrams. These flows can be used for material accountancy and for data analysis. At Los Alamos National Laboratory (LANL), the Technical Area (TA)-55 Plutonium Facility is home to various research and development activities involving the use of special nuclear material (SNM). A facility conducting research and development (R and D) activities using SNM must satisfy material accountability guidelines. All processes involving SNM or tritium processing, at LANL, require a process accountability flow diagram (PAFD). At LANL a technique was developed to generate PAFDs that can be coupled to a relational database for use in material accountancy. These techniques could also be used for propagation of variance, measurement control, and inventory difference analysis. The PAFD is a graphical representation of the material flow during a specific process. PAFDs are currently stored as PowerPoint files. In the PowerPoint format, the data captured by the PAFD are not easily accessible. Converting the PAFDs to an accessible electronic format is desirable for several reasons. Any program will be able to access the data contained in the PAFD. For the PAFD data to be useful in applications such as an expert system for data checking, SNM accountability, inventory difference evaluation, measurement control, and other kinds of analysis, it is necessary to interface directly with the information contained within the PAFD. The PAFDs can be approved and distributed electronically, eliminating the paper copies of the PAFDs and ensuring that material handlers have the current PAFDs. Modifications to the PAFDs are often global. Storing the data in an accessible format would eliminate the need to manually update each of the PAFDs when a global change has occurred. The goal was to determine a software package that would store the PAFDs in an accessible format that could be interfaced by various programs. After evaluating several commercial relational database and graphing software packages, VISIO Enterprise was selected. LANL is in the process of completing conversion of the existing PAFDs into VISIO Enterprise. A number of the PAFDs have been converted to VISIO Enterprise, and the data from the drawings have been exported to an ACCESS database. After the conversion has taken place, the data contained in the PAFDs will be accessible for various programs. The data that was once stored in PowerPoint will now be available for tools, including expert analysis, propagation of a variance, SNM accountability, inventory difference analysis, measurement control, and other analysis tools that have yet to be identified. Converting from the PowerPoint format to a drawing stored as a relational database will improve the ability of plant personnel to interface with the PAFD.

Knepper, P.; Whiteson, R.; Strittmatter, R.; Mousseau, K.

1999-07-01

41

Diagram of the Biofuel Production Process (SPORL -Alcohol Production):Introduction: The Northwest Advanced Renewables Alliance (NARA) is an organization  

E-print Network

Diagram of the Biofuel Production Process (SPORL - Alcohol Production):Introduction: The Northwest Advanced Renewables Alliance (NARA) is an organization that aims to create a sustainable aviation biofuels to determine the atmospheric emissions and emission sources that may be released from proposed NARA biofuels

Collins, Gary S.

42

Precise vs. UltraLight Activity Diagrams - An Experimental Assessment in the Context of Business Process Modelling  

Microsoft Academic Search

\\u000a UML activity diagrams are a commonly used notation for modelling business processes in the field of both workflow automation\\u000a and requirements engineering. In this paper, we present a novel precise style for this notation. Further, the effectiveness\\u000a of this style has been investigated in the context of the modelling of business processes through a controlled experiment\\u000a conducted with master students

Francesco Di Cerbo; Gabriella Dodero; Gianna Reggio; Filippo Ricca; Giuseppe Scanniello

43

UCSD Graduate Council Report of Block Grant Allocation Process Subcommittee  

E-print Network

for academic year (n , n+1) is given by Bn = Nn-1 · Kn · Mn , where Nn-1 is the average departmental graduate=2009, is shown in fig. 1. The K values, which are specific to each department, accrue annual cost of living adjustments (COLA) according to Kn = (1 + cn) · Kn-1 , 1 For example, the Block Grant allocation

Gleeson, Joseph G.

44

Networks of Influence Diagrams: A Formalism for Representing Agents' Beliefs and Decision-Making Processes  

Microsoft Academic Search

This paper presents Networks of Influence Diagrams (NID), a compact, natural and highly expressive language for reasoning about agents' beliefs and decision-making pro- cesses. NIDs are graphical structures in which agents' mental models are represented as nodes in a network; a mental model for an agent may itself use descriptions of the mental models of other agents. NIDs are demonstrated

Ya'akov Gal; Avi Pfeffer

2008-01-01

45

Velocity diagrams  

NASA Technical Reports Server (NTRS)

The selection and design of velocity diagrams for axial flow turbines are considered. Application is treated in two parts which includes: (1) mean-section diagrams, and (2) radial variation of diagrams. In the first part, the velocity diagrams occurring at the mean section are assumed to represent the average conditions encountered by the turbine. The different types of diagrams, their relation to stage efficiency, and their selection when staging is required are discussed. In the second part, it is shown that in certain cases the mean-section diagrams may or may not represent the average flow conditions for the entire blade span. In the case of relatively low hub- to tip-radius ratios, substantial variations in the velocity diagrams are encountered. The radial variations in flow conditions and their effect on the velocity diagrams are considered.

Whitney, W. J.; Stewart, W. L.

1972-01-01

46

The testing of thermal-mechanical-hydrological-chemical processes using a large block  

SciTech Connect

The radioactive decay heat from nuclear waste packages may, depending on the thermal load, create coupled thermal-mechanical-hydrological-chemical (TMHC) processes in the near-field environment of a repository. A group of tests on a large block (LBT) are planned to provide a timely opportunity to test and calibrate some of the TMHC model concepts. The LBT is advantageous for testing and verifying model concepts because the boundary conditions are controlled, and the block can be characterized before and after the experiment. A block of Topopah Spring tuff of about 3 {times} 3 {times} 4.5 m will be sawed and isolated at Fran Ridge, Nevada Test Site. Small blocks of the rock adjacent to the large block will be collected for laboratory testing of some individual thermal-mechanical, hydrological, and chemical processes. A constant load of about 4 MPa will be applied to the top and sides of the large block. The sides will be sealed with moisture and thermal barriers. The large block will be heated with one heater in each borehole and guard heaters on the sides so that a dry-out zone and a condensate zone will exist simultaneously. Temperature, moisture content, pore pressure, chemical composition, stress and displacement will be measured throughout the block during the heating and cool-down phases. The results from the experiments on small blocks and the tests on the large block will provide a better understanding of some concepts of the coupled TMHC processes.

Lin, W.; Wilder, D.G.; Blink, J.A.; Blair, S.C.; Buscheck, T.A.; Chesnut, D.A.; Glassley, W.E.; Lee, K.; Roberts, J.J.

1994-01-01

47

Analysis and Control of Batch Order Picking Processes Considering Picker Blocking  

E-print Network

distance required to retrieve the items. As more pickers are added to meet increased demand, order picking performance is likely to decline due to significant picker blocking. However, in batch picking, the process of assigning orders to particular batches...

Hong, Soon Do

2011-10-21

48

The design, synthesis and properties of pressure-processable biodegradable block copolymers  

E-print Network

In this thesis, biodegradable block copolyesters were specifically designed and synthesized for their susceptibility to pressure-induced mixing. These baroplastic materials are capable of being processed and molded through ...

Lovell, Nathan Gary

2005-01-01

49

Linking attentional processes and conceptual problem solving: visual cues facilitate the automaticity of extracting relevant information from diagrams  

PubMed Central

This study investigated links between visual attention processes and conceptual problem solving. This was done by overlaying visual cues on conceptual physics problem diagrams to direct participants’ attention to relevant areas to facilitate problem solving. Participants (N = 80) individually worked through four problem sets, each containing a diagram, while their eye movements were recorded. Each diagram contained regions that were relevant to solving the problem correctly and separate regions related to common incorrect responses. Problem sets contained an initial problem, six isomorphic training problems, and a transfer problem. The cued condition saw visual cues overlaid on the training problems. Participants’ verbal responses were used to determine their accuracy. This study produced two major findings. First, short duration visual cues which draw attention to solution-relevant information and aid in the organizing and integrating of it, facilitate both immediate problem solving and generalization of that ability to new problems. Thus, visual cues can facilitate re-representing a problem and overcoming impasse, enabling a correct solution. Importantly, these cueing effects on problem solving did not involve the solvers’ attention necessarily embodying the solution to the problem, but were instead caused by solvers attending to and integrating relevant information in the problems into a solution path. Second, this study demonstrates that when such cues are used across multiple problems, solvers can automatize the extraction of problem-relevant information extraction. These results suggest that low-level attentional selection processes provide a necessary gateway for relevant information to be used in problem solving, but are generally not sufficient for correct problem solving. Instead, factors that lead a solver to an impasse and to organize and integrate problem information also greatly facilitate arriving at correct solutions. PMID:25324804

Rouinfar, Amy; Agra, Elise; Larson, Adam M.; Rebello, N. Sanjay; Loschky, Lester C.

2014-01-01

50

Phase Diagrams  

NSDL National Science Digital Library

This problem set challenges students to interpret a simplified temperature-composition phase diagram for the system enstatite (Mg2Si2O6) - diopside (CaMgSi2O6), which are common constituents of peridotites, gabbros, and basalts. Students are provided with the phase diagram and asked to answer 13 questions about it.

51

Military Curricula for Vocational & Technical Education. Metals Processing Specialist, Block VII, Classroom Course 13-8.  

ERIC Educational Resources Information Center

These curriculum materials are the fourth section of a four-part, secondary-postsecondary-level course in metals processing. The course is one of a number of military-developed curriculum packages selected for adaptation to vocational instruction and curriculum development in a civilian setting. Block VII deals with heat treating, hardness…

Ohio State Univ., Columbus. National Center for Research in Vocational Education.

52

System identification for block-ice process: Comparison between linear and neural network models  

Microsoft Academic Search

This paper presents an application of system identification techniques for block-ice process. In particular, we compare two parametric models, namely, linear and neural network models. Linear models are built with Auto-Regressive model with exogenous inputs (ARX structure). Feedforward neural networks (NNARX structure) are constructed using the information provided by the linear ARX models. In addition, the Optimal Brain Surgeon (OBS)

Minh Le Hai; David Banjerdpongchai

2008-01-01

53

Death and Bereavement. Module A-6. Block A. Basic Knowledge of the Aging Process.  

ERIC Educational Resources Information Center

This instructional module on death and bereavement is one in a block of 10 modules designed to provide the human services worker who works with older adults with basic information regarding the aging process. An introduction provides an overview of the module content. A listing of general objectives follows. Four sections present informative…

Harvey, Dexter; Cap, Orest

54

Time and Fairness in a Process Algebra with Non-blocking Reading  

Microsoft Academic Search

We introduce the first process algebra with non-blocking reading actions for modelling concurrent asynchronous systems. We study the impact this new kind of actions has on fairness, liveness and the tim- ing of systems, using as application Dekker's mutual exclusion algorithm we already considered in (4). Regarding some actions as reading, this algo- rithm satisfies MUTEX liveness already under the

Flavio Corradini; Maria Rita Di Berardini; Walter Vogler

2009-01-01

55

Simplified Cu/Polyimide Damascene Approach Based on Imprint Process of Soluble Block Copolymer Polyimide  

NASA Astrophysics Data System (ADS)

In this study, a Cu/polyimide damascene approach based on an imprint technique was demonstrated aiming at developing a low-cost fabrication process for high-density interconnections in polyimide. First, a UV-assisted thermal imprint process that utilizes the high formability and low shrinkage of a soluble block copolymer polyimide was proposed as a high precision patterning process for polyimide. As a result, fine patterns (line widths ranging from 3 to 50 µm) with rectangular cross sections and clear line edges were fabricated in soluble block copolymer polyimide films by UV-assisted thermal imprinting followed by curing. Additionally, Cu damascene structures with a minimum line width of 3 µm were fabricated in the polyimide by performing subsequent Cu electroplating and chemical mechanical polishing (CMP), and the feasibility of the process was verified.

Park, Sang-Cheon; Youn, Sung-Won; Hiroshima, Hiroshi; Takagi, Hideki; Maeda, Ryutaro; Kato, Takahisa

2013-10-01

56

Imprints of Archean to Neoproterozoic crustal processes in the Madurai Block, Southern India  

NASA Astrophysics Data System (ADS)

Madurai Block, the largest crustal block in the Southern Granulite Terrane (SGT) of Peninsular India, preserves the imprints of multistage tectonic evolution. Here, we present U-Pb and Hf isotope data on zircons from a charnockite-granite suite in the north-western part of this block. The oscillatory zoning, and the LREE to HREE enriched patterns of the zircons with positive Ce and negative Eu anomalies suggest that the zircon cores are of magmatic origin, with ages in the range of 2634-2435 Ma implying Neoarchean-Paleoproterozoic magmatism followed by subsequent metamorphism and protocontinent formation in the north-western part of the Madurai Block. A regional 550-500 Ma metamorphic overprint is also preserved in the zircons coinciding with the final amalgamation of the Gondwana supercontinent. The Hf isotopic data suggest that the granite and charnockite were derived from isotopically heterogeneous juvenile crustal domains and the charnockites show a significant contribution of mantle-derived components. Therefore, the Hf isotopic data reflect mixing of crustal and mantle-derived sources for the generation of Neoarchean crust in the north-western Madurai Block, possibly in a suprasubduction zone setting during continent building processes.

Bhattacharya, Shrema; Santosh, M.; Zhang, Zhaochong; Huang, He; Banerjee, Amlan; George, P. M.; Sajeev, K.

2014-07-01

57

Performance of Three Mode-Meter Block-Processing Algorithms for Automated Dynamic Stability Assessment  

Microsoft Academic Search

The frequency and damping of electromechanical modes offer considerable insight into the dynamic stability properties of a power system. The performance properties of three mode-estimation block-processing algorithms from the perspective of near real-time automated stability assessment are demonstrated and examined. The algorithms are: the extended modified Yule Walker (YW); extended modified Yule Walker with spectral analysis (YWS); and sub-space system

Daniel J. Trudnowski; John W. Pierre; Ning Zhou; John F. Hauer; Manu Parashar

2008-01-01

58

Morphological similarity of a tri-block copolymer processed at ambient and elevated temperatures  

NASA Astrophysics Data System (ADS)

We investigated the effect of temperature on the morphology of a tri-block copolymer (BCP) processed in a capillary rheometer. The material used was a polystyrene- b-poly(2-ethylhexyl acrylate)- b-polystyrene (PS- b-PEHA- b-PS) tri-block copolymer, which was synthesized by ATRP with a molecular weight of 38.5 K consisting of 49 molar % PEHA. According to the rheological data obtained with dynamic viscoelastic oscillatory measurements, order-disorder temperature (ODT) of the BCP was measured at around 110°C. Considering this observation, the samples were studied under different temperatures and pressures (from 110°C to 28°C and from 48 to 75 bar) in capillary rheometer. All processed materials were characterized by using differential scanning calorimetry (DSC) and atomic force microscopy (AFM). It was found that all samples processed by aid of either temperature or pressure showed similar mixed morphologies (a mixture of the ordered and disordered structures i.e., the reduction of microphase separation due to processing).

?nceo?lu, ?ebnem; Aytun, Taner; Mencelo?lu, Yusuf Z.; Özen, ?lhan; Acar, Metin H.

2012-12-01

59

Analysis of backward error recovery for concurrent processes with recovery blocks  

NASA Technical Reports Server (NTRS)

Three different methods of implementing recovery blocks (RB's). These are the asynchronous, synchronous, and the pseudo recovery point implementations. Pseudo recovery points so that unbounded rollback may be avoided while maintaining process autonomy are proposed. Probabilistic models for analyzing these three methods under standard assumptions in computer performance analysis, i.e., exponential distributions for related random variables were developed. The interval between two successive recovery lines for asynchronous RB's mean loss in computation power for the synchronized method, and additional overhead and rollback distance in case PRP's are used were estimated.

Shin, K. G.; Lee, Y. H.

1982-01-01

60

Process-controlled multiscale morphologies in metal-containing block copolymer thin films.  

PubMed

Poly(styrene-block-ferrocenyldimethylsilane) (PS-b-PFS) is a metal-containing block copolymer that exhibits certain advantages as a scaffold for nanoporous membranes and as a mask for lithographic applications. These advantages include compatibility with a wide range of substrates, ease of control over domain morphologies and remarkable stability, which aid in the development of robust nanoporous networks or high-aspect-ratio patterns. An asymmetric cylinder-forming PS-b-PFS copolymer is subjected to different processing to manipulate the morphology of the phase-separated domains. Control of film structure and domain morphology is achieved by adjusting the film thickness, mode of annealing, and/or annealing time. Changing the process from thermal or solvent annealing to hybrid annealing (thermal and then solvent annealing in sequence) leads to the formation of mesoscale spherulitic and dendritic morphologies. In this communication, we show that reversing the order of the hybrid annealing (solvent annealing first and then thermal annealing) of relatively thick films (> 100 nm) on homogeneously thick substrates develops a discontinuous lamellar structure. Furthermore, the same processing applied on a substrate with a thin, mechanically flexible window in the center leads to the formation of sub-micron scale concentric ring patterns. Enhanced material mobility in the thick film during hybrid annealing along with dynamic rippling effects that may arise from the vibration of the thin window during spin casting are likely causes for these morphologies. PMID:24745279

Ramanathan, Muruganathan; Kilbey, S Michael; Darling, Seth B

2014-03-01

61

Process Controlled Multiscale Morphologies in Metal-containing Block Copolymer Thin Films  

SciTech Connect

Poly(styrene-block-ferrocenyldimethylsilane) (PS-b-PFS) is a metal-containing block copolymer that exhibits certain advantages as a mask for lithographic applications. These advantages include compatibility with a wide range of substrates, ease of control over domain morphologies and robust stability to etch plasma, which aid in the development of high-aspect-ratio patterns. An asymmetric cylinder-forming PS-b-PFS copolymer is subjected to different processing to manipulate the morphology of the phase-separated domains. Control of film structure and domain morphology is achieved by adjusting the film thickness, mode of annealing, and/or annealing time. Changing the process from thermal or solvent annealing to hybrid annealing (thermal and then solvent annealing in sequence) leads to the formation of mesoscale spherulitic and dendritic morphologies. In this communication, we show that reversing the order of the hybrid annealing (solvent annealing first and then thermal annealing) of relatively thick films (>100 nm) on homogeneously thick substrates develops disordered lamellar structure. Furthermore, the same processing applied on a substrate with a thin, mechanically flexible window in the center leads to the formation of sub-micron scale concentric ring patterns. Enhanced material mobility in the thick film during hybrid annealing along with dynamic rippling effects that may arise from the vibration of the thin window during spin casting are likely causes for these morphologies.

Ramanathan, Nathan Muruganathan [ORNL] [ORNL; Kilbey, II, S Michael [ORNL; Darling, Seth B. [Argonne National Laboratory (ANL)] [Argonne National Laboratory (ANL)

2014-01-01

62

Nickel ferrite aerogels with monodisperse nanoscale building blocks--the importance of processing temperature and atmosphere.  

PubMed

Using two-step (air/argon) thermal processing, sol-gel-derived nickel-iron oxide aerogels are transformed into monodisperse, networked nanocrystalline magnetic oxides of NiFe(2)O(4) with particle diameters that can be ripened with increasing temperature under argon to 4.6, 6.4, and 8.8 nm. Processing in air alone yields poorly crystalline materials; heating in argon alone leads to single phase, but diversiform, polydisperse NiFe(2)O(4), which hampers interpretation of the magnetic properties of the nanoarchitectures. The two-step method yields an improved model system to study magnetic effects as a function of size on the nanoscale while maintaining the particles within the size regime of single domain magnets, as networked building blocks, not agglomerates, and without stabilizing ligands capping the surface. PMID:19206611

Pettigrew, Katherine A; Long, Jeffrey W; Carpenter, Everett E; Baker, Colin C; Lytle, Justin C; Chervin, Christopher N; Logan, Michael S; Stroud, Rhonda M; Rolison, Debra R

2008-04-01

63

Autoplan: A self-processing network model for an extended blocks world planning environment  

NASA Technical Reports Server (NTRS)

Self-processing network models (neural/connectionist models, marker passing/message passing networks, etc.) are currently undergoing intense investigation for a variety of information processing applications. These models are potentially very powerful in that they support a large amount of explicit parallel processing, and they cleanly integrate high level and low level information processing. However they are currently limited by a lack of understanding of how to apply them effectively in many application areas. The formulation of self-processing network methods for dynamic, reactive planning is studied. The long-term goal is to formulate robust, computationally effective information processing methods for the distributed control of semiautonomous exploration systems, e.g., the Mars Rover. The current research effort is focusing on hierarchical plan generation, execution and revision through local operations in an extended blocks world environment. This scenario involves many challenging features that would be encountered in a real planning and control environment: multiple simultaneous goals, parallel as well as sequential action execution, action sequencing determined not only by goals and their interactions but also by limited resources (e.g., three tasks, two acting agents), need to interpret unanticipated events and react appropriately through replanning, etc.

Dautrechy, C. Lynne; Reggia, James A.; Mcfadden, Frank

1990-01-01

64

Arrows in Comprehending and Producing Mechanical Diagrams  

ERIC Educational Resources Information Center

Mechanical systems have structural organizations--parts, and their relations--and functional organizations--temporal, dynamic, and causal processes--which can be explained using text or diagrams. Two experiments illustrate the role of arrows in diagrams of mechanical systems. In Experiment 1, people described diagrams with or without arrows,…

Heiser, Julie; Tversky, Barbara

2006-01-01

65

NTNU Java: Free-Body Force Diagram  

NSDL National Science Digital Library

This applet illustrates the forces on a block on an inclined plane. A free-body diagram shows the gravitational, normal, frictional and net force vectors. The weight, angle of the plane, and coefficient of friction can be changed by the user. The user can also apply an external force to the block. The motion resulting from the forces is not shown.

Hwang, Fu-Kwun

2005-02-07

66

Quantum Diagrams and Quantum Networks  

E-print Network

This paper is an introduction to diagrammatic methods for representing quantum processes and quantum computing. We review basic notions for quantum information and quantum computing. We discuss topological diagrams and some issues about using category theory in representing quantum computing and teleportation. We analyze very carefully the diagrammatic meaning of the usual representation of the Mach-Zehnder interferometer, and we show how it can be generalized to associate to each composition of unitary transformations a "laboratory quantum diagram" such that particles moving though the many alternate paths in this diagram will mimic the quantum process represented by the composition of unitary transformations. This is a finite dimensional way to think about the Feynman Path Integral. We call our representation result the Path Theorem. Then we go back to the basics of networks and matrices and show how elements of quantum measurement can be represented with network diagrams.

Louis H. Kauffman; Samuel J. Lomonaco Jr

2014-04-17

67

Combining stressors that individually impede long-term memory blocks all memory processes.  

PubMed

The effects of stress on memory are typically assessed individually; however, in reality different stressors are often experienced simultaneously. Here we determined the effect that two environmentally relevant stressors, crowding and low calcium availability, have on memory and neural activity following operant conditioning of aerial respiration in the pond snail, Lymnaea stagnalis. We measured aerial breathing behaviour and activity of a neuron necessary for memory formation, right pedal dorsal 1 (RPeD1), in the central pattern generator (CPG) that drives aerial respiration in untrained animals, and assessed how these traits changed following training. In naïve animals both crowding and combined stressors significantly depressed burst activity in RPeD1 which correlated with a depression in aerial breathing behaviour, whereas low calcium availability had no effect on RPeD1 activity. Following training, changes in burst activity in RPeD1 correlated with behavioural changes, decreasing relative to their naïve state at 3 h and 24 h in control conditions when both intermediate-term memory (ITM: 3 h) and long-term memory (LTM: 24 h) are formed, at 3 h but not 24 h when exposed to individual stressors when only ITM is formed, and did not change in combined stressors (i.e. when no memory is formed). Additionally, we also found that Lymnaea formed short-term memory (STM: 10 min) in the presence of individual stressors or under control conditions, but failed to do so in the presence of combined stressors. Our data demonstrate that by combining stressors that individually block LTM only we can block all memory processes. Therefore the effects of two stressors with similar individual affects on memory phenotype may be additive when experienced in combination. PMID:24223180

Dalesman, Sarah; Sunada, Hiroshi; Teskey, Morgan Lee; Lukowiak, Ken

2013-01-01

68

Combining Stressors That Individually Impede Long-Term Memory Blocks All Memory Processes  

PubMed Central

The effects of stress on memory are typically assessed individually; however, in reality different stressors are often experienced simultaneously. Here we determined the effect that two environmentally relevant stressors, crowding and low calcium availability, have on memory and neural activity following operant conditioning of aerial respiration in the pond snail, Lymnaea stagnalis. We measured aerial breathing behaviour and activity of a neuron necessary for memory formation, right pedal dorsal 1 (RPeD1), in the central pattern generator (CPG) that drives aerial respiration in untrained animals, and assessed how these traits changed following training. In naïve animals both crowding and combined stressors significantly depressed burst activity in RPeD1 which correlated with a depression in aerial breathing behaviour, whereas low calcium availability had no effect on RPeD1 activity. Following training, changes in burst activity in RPeD1 correlated with behavioural changes, decreasing relative to their naïve state at 3 h and 24 h in control conditions when both intermediate-term memory (ITM: 3 h) and long-term memory (LTM: 24 h) are formed, at 3 h but not 24 h when exposed to individual stressors when only ITM is formed, and did not change in combined stressors (i.e. when no memory is formed). Additionally, we also found that Lymnaea formed short-term memory (STM: 10 min) in the presence of individual stressors or under control conditions, but failed to do so in the presence of combined stressors. Our data demonstrate that by combining stressors that individually block LTM only we can block all memory processes. Therefore the effects of two stressors with similar individual affects on memory phenotype may be additive when experienced in combination. PMID:24223180

Teskey, Morgan Lee; Lukowiak, Ken

2013-01-01

69

TIME-SCALE BLOCK BOOTSTRAP TESTS FOR NON GAUSSIAN FINITE VARIANCE SELF-SIMILAR PROCESSES WITH STATIONARY INCREMENTS  

E-print Network

TIME-SCALE BLOCK BOOTSTRAP TESTS FOR NON GAUSSIAN FINITE VARIANCE SELF-SIMILAR PROCESSES could be based on non parametric bootstrap approaches. We showed that such procedures are efficient processes. In the present contribution, we investigate the relevance of such bootstrap procedures

Paris-Sud XI, Université de

70

Block copolymer lithography for growth of wide band gap nanostructures: Process control and optimization  

Microsoft Academic Search

Block copolymer lithography offers a promising route for fabricating wide band gap semiconductor quantum dots. A PS-PMMA block copolymer is self-assembled over a random copolymer brush to allow for perpendicular orientation of PMMA cylinders. The substrate consists of GaAs, SiO2 and the brush layer. The block copolymer pattern is transferred to the SiO2 by reactive ion etching. In the next

Kasiraman Krishnan; Azar Alizadeh; Oliver Boomhover; Kenneth Conway; Lauraine Denault; David Hays; Christopher Keimel; Rosalyn Neander; Seth Taylor; Andreas Stintz; Jay Brown; Sanjay Krishna; Colin Jones

2007-01-01

71

True Phase Diagrams  

NASA Astrophysics Data System (ADS)

With the use of today's computer softwares, phase diagrams can readily be plotted with a wide choice of variables on the axes. Hillert defined a true phase diagram as a diagram where each point uniquely defines the stable phases. He also showed that not all choices of axis variables give true phase diagrams. In this note we will demonstrate that although the rules stated by Hillert are necessary they are not sufficient to have true phase diagrams.

Ågren, John; Schmid-Fetzer, Rainer

2014-10-01

72

Processing-structure-mechanical Property Relationships of Semicrystalline Polyolefin-based Block Copolymers  

SciTech Connect

The incremental plastic deformation of the crystals of block copolymers made of semicrystalline polypropylene endblocks and amorphous ethylene-r-propylene midblocks occurring during step cycle tensile tests has dramatic effects on the stress-strain curves. This can be understood from the evolution of the morphology and of the microstructure of the crystalline blocks revealed by X-ray scattering experiments.

Deplace, F.; Wang, Z; Lynd, N; Hotta, A; Rose, J; Hustad, P; Tian, J; Ohtaki, H; Coates, J; et. al.

2010-01-01

73

Forming Limit Diagrams of Zircaloy-4 and Zirlo Sheets for Stamping Process of Spacer Grids of Nuclear Fuel Rod  

NASA Astrophysics Data System (ADS)

We investigated the theoretical forming limit models for Zircaloy-4 and Zirlo used for spacer grid of nuclear fuel rods. Tensile tests were performed to obtain stress-strain curves and anisotropic coefficients, such as r-values. The experimental forming limit diagrams (FLD) for two materials were obtained by dome stretching tests following the specification of NUMISHEET 96. Theoretical FLD depends on forming limit model and yield criterion. To obtain the right hand side of FLD, we applied the forming limit models (Swift's diffuse necking, Marciniak-Kuczynski damage defect, Storen-Rice's vertex theory) to Zircaloy-4 and Zirlo sheets. Hill's local necking theory was adopted for the left side of FLD. To consider the anisotropy of sheets, the yield criteria of Hill (1948) and Hosford (1979) were applied. Comparing the predicted curves with the experimental data, we found that the FLD for Zircaloy-4 can be described by the Swift model with the Hill 48 yield criterion, while the FLD for Zirlo can be explained by the Storen-Rice model and the Hosford yield criterion (a = 8).

Seo, Yunmi; Hyun, Hong Chul; Lee, Hyungyil; Kim, Naksoo

2011-08-01

74

Establishment of pseudoternary LiO0.5-NiO-MnO2 phase diagram by combinatorial wet process.  

PubMed

A pseudoternary LiO0.5-NiO-MnO2 reaction phase diagram was established using a combinatorial high-throughput materials exploration process to find candidate electrode materials for lithium ion secondary batteries. Each powder library was prepared using our combinatorial wet process based on the electrostatic spray deposition method and results obtained at various firing temperatures in an air atmosphere and an oxide atmosphere. In the air atmosphere, newly composed single phase regions of a layered rock salt-type structure were only found around Li2MnO3 at 800 °C. On the other hand, in the oxide atmosphere, most of the powder library showed the multiphase of the spinel and layered rock salt type structure. PMID:24171655

Fujimoto, Kenjiro; Shimura, Yosuke; Ito, Shigeru

2013-12-01

75

Rapid Modular Synthesis and Processing of Thiol-Ene Functionalized Styrene-Butadiene Block Copolymers  

E-print Network

difficult. Therefore, the development of facile and effective postpolymerization modification techniques of Chemistry and Materials Science, Food and Drug Administration, Silver Spring, Maryland 20993, United States. This technique described allows for the formation of nanopatterned block copolymer films with controlled

Rubloff, Gary W.

76

Military Curricula for Vocational & Technical Education. Metals Processing Specialist, Blocks III and IV, Classroom Course 13-6.  

ERIC Educational Resources Information Center

These curriculum materials are the second section of a four-part, secondary-postsecondary-level course in metals processing. The course is one of a number of military-developed curriculum packages selected for adaptation to vocational instruction and curriculum development in a civilian setting. Block III, Introduction to Metallic Arc Welding,…

Ohio State Univ., Columbus. National Center for Research in Vocational Education.

77

Military Curricula for Vocational & Technical Education. Metals Processing Specialist, Blocks I and II, Classroom Course 13-5.  

ERIC Educational Resources Information Center

These curriculum materials are the first section of a four-part, secondary-postsecondary-level course in metals processing. The course is one of a number of military-developed curriculum packages selected for adaptation to vocational instruction and curriculum development in a civilian setting. Block I, Introduction to Oxyacetylene Welding,…

Ohio State Univ., Columbus. National Center for Research in Vocational Education.

78

Simplified Voronoi Diagrams  

E-print Network

The Voronoi diagram has proved to be a useful tool in a variety of contexts in computational geometry. Our interest here is in using the diagram to simplify the planning of collision-free paths for a robot among ...

Canny, John

1987-04-01

79

The geological processes time scale of the Ingozersky block TTG complex (Kola Peninsula)  

NASA Astrophysics Data System (ADS)

Ingozersky block located in the Tersky Terrane of the Kola Peninsula is composed of Archean gneisses and granitoids [1; 5; 8]. The Archaean basement complexes on the regional geological maps have called tonalite-trondemit-gneisses (TTG) complexes [6]. In the previous studies [1; 3; 4; 5; 7] within Ingozersky block the following types of rocks were established: biotite, biotite-amphibole, amphibole-biotite gneisses, granites, granodiorites and pegmatites [2]. In the rocks of the complex following corresponding sequence of endogenous processes observed (based on [5]): stage 1 - the biotitic gneisses formation; 2 - the introduction of dikes of basic rocks; 3 phase - deformation and foliation; 4 stage - implementation bodies of granite and migmatization; 5 stage - implementation of large pegmatite bodies; stage 6 - the formation of differently pegmatite and granite veins of low power, with and without garnet; stage 7 - quartz veins. Previous U-Pb isotopic dating of the samples was done for biotite gneisses, amphibole-biotite gneisses and biotite-amphibole gneisses. Thus, some Sm-Nd TDM ages are 3613 Ma - biotite gnesses, 2596 Ma - amphibole-biotite gnesses and 3493 Ma biotite-amphibole gneisses.. U-Pb ages of the metamorphism processes in the TTG complex are obtained: 2697±9 Ma - for the biotite gneiss, 2725±2 and 2667±7 Ma - for the amphibole-biotite gneisses, and 2727±5 Ma for the biotite-amphibole gneisses. The age defined for the biotite gneisses by using single zircon dating to be about 3149±46 Ma corresponds to the time of the gneisses protolith formation. The purpose of these studies is the age establishing of granite and pegmatite bodies emplacement and finding a geological processes time scale of the Ingozerskom block. Preliminary U-Pb isotopic dating of zircon and other accessory minerals were held for granites - 2615±8 Ma, migmatites - 2549±30 Ma and veined granites - 1644±7 Ma. As a result of the isotope U-Pb dating of the different Ingozerskogo TTG complex rocks, the following age-formation stages are determined: protolith of the biotite gneisses - 3149±46 Ma; metamorphism, deformation of rocks, foliation - 2727±5 - 2725±2 - 2697±9 - 2667±7 Ma, granite bodies formation - 2615±8 Ma and biotite gneisses migmatization - 2549±30 Ma, formation of different pegmatite and granite veins -1644±7 Ma. Author are grateful to Akad. Mitrofanov F.P. and Bayanova T.B. for the consultations. The work is supported by RFBR 12-05-31063, 11-05-00570. 1.Batieva I.D., Belkov I.V. Granitoidnie formacii Kolskogo poluostrova. // Ocgerki po petrologiy, mineralogiy i metallogeniy Kolskogo poluostrova. L.: Nauka. 1968. p. 5-143. (in russian) 2. Belkov I.V., Zagorodny V.G., Predovsky A.A. et al. Stratigraficheskoe raschlenenie i korrelyacia dokembria severo-vostochoi chasty Baltiyskogo shita. L.: Nauka. 1971. p. 141-150. (in russian) 3. Docembriskaya tektonica severo-vostochoi chasty Baltiyskogo shita (Ob'asnitelnaya zapiska k tektonicheskoi karte severo-vostochoi chasty Baltiyskogo shita 1:500000) / ed.: F.P.Mitrofanov. Apatity: KFAN SSSR. 1992. 112 P. (in russian) 4. Zagorodny V.G., Radchenko A.T. Tectonika i glubinnoe stroenie severo-vostochoi chasty Baltiyskogo shita. Apatity: KFA SSSR. 1978. p. 3-12. (in russian) 5. Kozlov N.E., Sorohtin N.O., Glaznev V.N. et al. Geologia Arhea Baltiskogo shita. S.Pb.: Nauka. 2006. 329 p. (in russian) 6. Mitrofanov F.P. Sovremennie problemy i nekotorie resheniya dokembriskoy geologii kratonov. (2001) Litosphera.2001. V 1. P. 5-14. (in russian) 7. Ob'asnitelnaya zapiska k geologicheskoy karte severo-vostochoi chasty Baltiyskogo shita 1:500000 / ed.: F.P.Mitrofanov. Apatity: KFAN SSSR. 1994. 95 P. (in russian) 8. Haritonov L.Y. Structura i stratigraphia karelid vostoka Baltiskogo shita. M.: Nedra. 1966. 354 P. (in russian)

Nitkina, Elena

2013-04-01

80

Simplified Voronoi Diagrams  

Microsoft Academic Search

We are interested in Voronoi diagrams as a tool in robot path planning, where thesearch for a path in an r dimensional space may be simplified to a search on an r - 1dimensional Voronoi diagram. We define a Voronoi diagram V based on a measure ofdistance which is not a true metric. This formulation has lower algebraic complexity thanthe

John F. Canny; Bruce Randall Donald

1988-01-01

81

AFM Diagram Quiz  

NSDL National Science Digital Library

This exercise should be used after you think students know what AFM diagrams are and how they work. This is sort of a quiz - to see if they can properly interpret the diagrams. There is no point moving on to real projects that involve AFM diagrams if the students don't understand the basics.

Perkins, Dexter

82

76 FR 2919 - Outer Continental Shelf Official Protraction Diagram and Supplemental Official Outer Continental...  

Federal Register 2010, 2011, 2012, 2013

...Regulation and Enforcement Outer Continental Shelf Official Protraction Diagram and Supplemental Official Outer Continental Shelf Block Diagrams AGENCY: Bureau...Datum of 1983 (NAD 83) Outer Continental Shelf Official Protraction...

2011-01-18

83

Phase Equilibria Diagrams Database  

National Institute of Standards and Technology Data Gateway

SRD 31 NIST/ACerS Phase Equilibria Diagrams Database (PC database for purchase)   The Phase Equilibria Diagrams Database contains commentaries and more than 21,000 diagrams for non-organic systems, including those published in all 21 hard-copy volumes produced as part of the ACerS-NIST Phase Equilibria Diagrams Program (formerly titled Phase Diagrams for Ceramists): Volumes I through XIV (blue books); Annuals 91, 92, 93; High Tc Superconductors I & II; Zirconium & Zirconia Systems; and Electronic Ceramics I. Materials covered include oxides as well as non-oxide systems such as chalcogenides and pnictides, phosphates, salt systems, and mixed systems of these classes.

84

Additive-driven assembly of block copolymer-nanoparticle hybrid materials for solution processable floating gate memory.  

PubMed

Floating gate memory devices were fabricated using well-ordered gold nanoparticle/block copolymer hybrid films as the charge trapping layers, SiO(2) as the dielectric layer, and poly(3-hexylthiophene) as the semiconductor layer. The charge trapping layer was prepared via self-assembly. The addition of Au nanoparticles that selectively hydrogen bond with pyridine in a poly(styrene-b-2-vinyl pyridine) block copolymer yields well-ordered hybrid materials at Au nanoparticle loadings up to 40 wt %. The characteristics of the memory window were tuned by simple control of the Au nanoparticle concentration. This approach enables the fabrication of well-ordered charge storage layers by solution processing, which is extendable for the fabrications of large area and high density devices via roll-to-roll processing. PMID:22272941

Wei, Qingshuo; Lin, Ying; Anderson, Eric R; Briseno, Alejandro L; Gido, Samuel P; Watkins, James J

2012-02-28

85

Venn Diagram Shape Sorter  

NSDL National Science Digital Library

In this activity, students practice placing big and small shapes into Venn diagrams depending on the rules of the diagram. Students can either specify these rules or have the applet assign the rules so they can try to figure them out by placing shapes in the diagram. This activity allows students to explore Venn diagrams and the terms associated with set theory. This activity includes supplemental materials, including background information about the topics covered, a description of how to use the application, and exploration questions for use with the java applet.

2010-01-01

86

The thermal process diagram and equipment of the secondary coolant circuit of a nuclear power station unit based on the BREST-OD-300 reactor installation for subcritical steam conditions  

NASA Astrophysics Data System (ADS)

The 300-MWe power unit based on an experimental-demonstration two-circuit 700-MWt reactor installation with lead coolant is briefly described. The thermal process diagram of the secondary coolant circuit for the subcritical steam conditions 17 MPa and 505°C at the outlet from steam generators is presented.

Nesterov, Yu. V.; Lisyanskii, A. S.; Makarova, E. I.; Bal'Va, L. Ya.; Prikhod'Ko, P. Yu.

2011-06-01

87

Hexagonally Arrayed 17 nm Interpenetrating and Continuous Biphasic Structure via Block-Copolymer-Templating Process  

NASA Astrophysics Data System (ADS)

Biphasic and interpenetrating continuous membranes with precisely controlled two-dimensional (2D)-hexagonal nanoperiodicity were fabricated using amphiphilic block copolymer poly(ethylene oxide)-b-polymethacrylate with azobenzene mesogen units in the side chain [PEOm-b-PMA(Az)n]. On a silica (SiO2) nanodot array templated from the block copolymer membrane, the next phase, such as titanium dioxide (TiO2), or gold (Au), was coated. Herein, the surface modification of the transferred SiO2 nanodot array was crucial to obtaining the interpenetration of the precursor of TiO2 and its continuous contact. The typical size of the hexagonal array (d) and the center-to-center distance (D) of the SiO2 nanodots were (d, D) = (17 nm, 27 nm) and (d, D) = (22 nm, 51 nm), respectively. The interpenetrating and continuous biphasic structure will provide a promising approach to multiferroic materials, interpenetrative heterojunction for solar cells, new integrated catalysts, and so forth.

Yamashita, Nanae; Komiyama, Hideaki; Zhao, Yongbin; Komura, Motonori; Iyoda, Tomokazu; Nagai, Keiji

2012-07-01

88

Formalizing Spider Diagrams  

Microsoft Academic Search

Geared to complement UML and to the specification of large software systems by non-mathematicians,spider di- agrams are a visual language that generalizes the popu- lar and intuitive Venn diagrams and Euler circles. The language design emphasized scalability and expressiveness while retaining intuitiveness. In this extended abstract we describe spider diagrams from a mathematical standpoint and show how their formal semantics

Joseph Gil; John Howse; Stuart Kent

1999-01-01

89

Lenses and Ray Diagrams  

NSDL National Science Digital Library

This is the first time that students will draw technical ray diagrams (in previous experiments, they simply sketched the rays). They need a little instruction in drawing ray diagrams before they can do it, so the activity is not purely inquiry. But it is

Horton, Michael

2009-05-30

90

Free-Body Diagrams: Necessary or Sufficient?  

NSDL National Science Digital Library

The Rutgers PAER group is working to help students develop various scientific abilities. One of the abilities is to create, understand and learn to use for qualitative reasoning and problem solving different representations of physical processes such as pictorial representations, motion diagrams, free-body diagrams, and energy bar charts. Physics education literature indicates that using multiple representations is beneficial for student understanding of physics ideas and for problem solving. We developed a special approach to construct and utilize free-body diagrams for representing physical phenomena and for problem solving. We will examine whether students draw free-body diagrams in solving problems when they know they will not receive credit for it; the consistency of their use in different conceptual areas; and if students who use free-body diagrams while solving problems in different areas of physics are more successful then those who do not.

Rosengrant, David; Van Heuvelen, A.; Etkina, Eugenia

2009-11-30

91

The Classroom as Rhizome: New Strategies for Diagramming Knotted Interactions  

ERIC Educational Resources Information Center

This article calls attention to the unexamined role of diagrams in educational research and offers examples of alternative diagramming practices or tools that shed light on classroom interaction as a rhizomatic process. Drawing extensively on the work of Latour, Deleuze and Guattari, and Chatelet, this article explores the power of diagramming as…

de Freitas, Elizabeth

2012-01-01

92

Dinosaur Extinction: Causal Loop Diagram of Earth Feedback System  

NSDL National Science Digital Library

This site features a causal loop diagram from system dynamics methodology showing the solar-earth-space energy flow system (the dominant flow system driving earth's surficial systems, including the biosphere) and interactive natural earthly processes that influence it. Also included is a discussion of the diagram, and a link to a page that explains how to read causal loop diagrams.

Mclean, Dewey M.; Tech, Virginia

93

Geometry of random Toeplitz-block sensing matrices: bounds and implications for sparse signal processing  

NASA Astrophysics Data System (ADS)

A rich body of literature has emerged during the last decade that seeks to exploit the sparsity of a signal for a reduction in the number of measurements required for various inference tasks. Much of the initial work in this direction has been for the case when the measurements correspond to a projection of the signal of interest onto the column space of (sub)Gaussian and subsampled Fourier matrices. The physics in a number of applications, however, dictates the use of "structured" matrices for measurement purposes. This has led to a recent push in the direction of structured measurement (or sensing) matrices for inference of sparse signals. This paper complements some of the recent work in this direction by studying the geometry of Toeplitz-block sensing matrices. Such matrices are bound to arise in any system that can be modeled as a linear, time-invariant (LTI) system with multiple inputs and single output. The reported results therefore should be of particular benefit to researchers interested in exploiting sparsity in LTI systems with multiple inputs.

Bajwa, Waheed U.

2012-06-01

94

Diagram of Computer Keyboard  

NSDL National Science Digital Library

This is a line drawing of a Windows PC keyboard complete with labels for each key. This diagram is used on tests where students are asked to circle the keys that would be used to perform various functions.

Ward, Charles

2011-01-21

95

Low temperature processing of baroplastic core-shell nanoparticles and block copolymers  

E-print Network

Baroplastics are nanophase polymeric materials comprised of two components that can miscibilize under pressure thereby facilitating flow. The possibility of processing these materials at low temperatures was the main focus ...

González-León, Juan A. (Juan Antonio)

2006-01-01

96

Voronoi Diagrams and Arrangements  

Microsoft Academic Search

We propose a uniform and general framework for defining and dealing with Voronoi diagrams. In this framework a Voronoi diagram is a partition of a domainD induced by a finite number of real valued functions onD. Valuable insight can be gained when one considers how these real valued functions partitionD ×R. With this view it turns out that the standard

Herbert Edelsbrunner; Raimund Seidel

1986-01-01

97

Inhibition of glycoprotein processing blocks assembly of spicules during development of the sea urchin embryo  

Microsoft Academic Search

Previous studies have implicated an 130-kD glycoprotein containing complex, N-linked oligosac- charide chain(s) in the process of spicule formation in sea urchin embryos. To ascertain whether the process- ing of high mannose oligosaccharides to complex oligosaccharides is necessary for spiculogenesis, intact embryos and cultures of spicule-forming primary mesenchyme cells were treated with glycoprotein pro- cessing inhibitors. In both the embryonic

Bruce Kabakoff; William J. Lennarz

1990-01-01

98

Building the blocks of executive functioning: differentiating early developing processes contributing to executive functioning skills.  

PubMed

The neural processes that underlie executive function begin to develop in infancy. However, it is unclear how the behavior manifested by these processes are related or if they can be differentiated early in development. This study seeks to examine early emerging executive functioning skills in monkeys (Macaca fascicularis) by using an error analysis approach where traditional measures of the tasks, as well as identification of major error patterns are related. Results show that during the infancy and early juvenile period, two processes that help support set-maintenance could be differentiated: modulation of responses to novelty and persistence despite negative feedback. The results suggest that these two aspects of set-maintenance were largely independent. Modulation of responses to novelty was most prominent in the infancy and early juvenile period. The ability to persist with a response set despite negative feedback emerged in the early juvenile period and was related to task performance until the end of the study. PMID:21563178

Mandell, Dorothy J; Ward, Sarah E

2011-12-01

99

Compute-unified device architecture implementation of a block-matching algorithm for multiple graphical processing unit cards  

PubMed Central

In this paper we describe and evaluate a fast implementation of a classical block matching motion estimation algorithm for multiple Graphical Processing Units (GPUs) using the Compute Unified Device Architecture (CUDA) computing engine. The implemented block matching algorithm (BMA) uses summed absolute difference (SAD) error criterion and full grid search (FS) for finding optimal block displacement. In this evaluation we compared the execution time of a GPU and CPU implementation for images of various sizes, using integer and non-integer search grids. The results show that use of a GPU card can shorten computation time by a factor of 200 times for integer and 1000 times for a non-integer search grid. The additional speedup for non-integer search grid comes from the fact that GPU has built-in hardware for image interpolation. Further, when using multiple GPU cards, the presented evaluation shows the importance of the data splitting method across multiple cards, but an almost linear speedup with a number of cards is achievable. In addition we compared execution time of the proposed FS GPU implementation with two existing, highly optimized non-full grid search CPU based motion estimations methods, namely implementation of the Pyramidal Lucas Kanade Optical flow algorithm in OpenCV and Simplified Unsymmetrical multi-Hexagon search in H.264/AVC standard. In these comparisons, FS GPU implementation still showed modest improvement even though the computational complexity of FS GPU implementation is substantially higher than non-FS CPU implementation. We also demonstrated that for an image sequence of 720×480 pixels in resolution, commonly used in video surveillance, the proposed GPU implementation is sufficiently fast for real-time motion estimation at 30 frames-per-second using two NVIDIA C1060 Tesla GPU cards. PMID:22347787

Massanes, Francesc; Cadennes, Marie; Brankov, Jovan G.

2012-01-01

100

Transformation Strategies between Block-Oriented and Graph-Oriented Process Modelling Languages  

Microsoft Academic Search

Much recent research work discusses the transformation between different process modelling languages. This work, however, is mainly focussed on specific pro- cess modelling languages, and thus the general reusability of the applied transformati- on concepts is rather limited. In this paper, we aim to abstract from concrete transfor- mation strategies by distinguishing two major paradigms for representing control flow in

Jan Mendling; Kristian Bisgaard Lassen; Uwe Zdun

2005-01-01

101

A new building block for analog signal processing: current follower\\/inverter buffered transconductance amplifier  

Microsoft Academic Search

A new active element for analog signal processing is proposed, namely the Current Follower\\/Inverter Buffered Transconductance Amplifier (CFBTA, CIBTA). This multiterminal device is a synthesis of the well-known Current Differencing Buffered Amplifier (CDBA) and Current Differencing Transconductance Amplifier (CDTA). The common input stage of these amplifiers, the Current Differencing Unit (CDU), is replaced by a simpler current follower or inverter.

Josef Bajer; Jiri Vavra; Dalibor Biolek

2009-01-01

102

Genetic Circuit Building Blocks for Cellular Computation, Communications, and Signal Processing  

E-print Network

will advance the capabilities of genetic engineering, and allow us to harness cells for a myriad evolution, ge- netic signal processing, synthetic gene networks 1. Introduction Genetic engineering at the possibilities for harnessing cells to our benefit. For the purpose of genetic engineering, it is currently

Batzoglou, Serafim

103

Wear Protection of AJ62 Mg Engine Blocks using Plasma Electrolytic Oxidation Process  

NASA Astrophysics Data System (ADS)

In order to reduce the fuel consumption and pollution, automotive companies are developing magnesium-intensive components. However, due to the low wear resistance of the magnesium (Mg) alloys, Mg cylinder bores are vulnerable to the sliding wear attack. In this thesis, two approaches were used to protect the cylinder bores, made of a new developed Mg engine alloy AJ62 (MgA16Mn0.34Sr2). The first one was to use a Plasma Electrolytic Oxidation (PEO) process to produce oxide coatings on the Mg bores. The wear properties of the PEO coatings were evaluated by sliding wear tests under the boundary lubrication condition at the room and elevated temperatures. It was found that due to the substrate softening and the vaporization loss of the lubricant, the tribological properties of the PEO coatings were deteriorated at the elevated temperature. In order to optimize the PEO process, a statistical method (Response surface method) was used to analyze the effects of the 4 main PEO process parameters with 2 levels for each and their interactions on the tribological properties of the PEO coatings at the room and elevated temperatures, individually. A cylinder liner made of an economical metal-matrix composite (MMC) was another approach to improve the wear resistance of the Mg cylinder bore. In this thesis, an A1383/SiO2 MMC was designed to replace the expensive Alusil alloy used in the BMW Mg/Al composite engine to build the cylinder liner. To further increase the wear resistance of the MMC, PEO process was also used to form an oxide coating on the MMC. The effects of the SiO 2 content and coating thickness on the tribological properties of the MMC were studied. To evaluate the wear properties of the optimal PEO coated Mg coupons and the MMC with the oxide coatings, Alusil and cast iron, currently used on the cylinder bores of the commercial aluminum engines, were used as reference materials. The optimal PEO coated Mg coupons and the oxidized MMC showed their advantages over the two reference materials under the high contact stress, especially at the elevated temperature.

Zhang, Peng

104

Air-stable, nanostructured electronic and plasmonic materials from solution-processable, silver nanocrystal building blocks.  

PubMed

Herein we describe a room-temperature, chemical process to transform silver nanocrystal solids, deposited from colloidal solutions, into highly conductive, corrosion-resistant, optical and electronic materials with nanometer-scale architectures. After assembling the nanocrystal solids, we treated them with a set of simple, compact, organic and inorganic reagents: ammonium thiocyanate, ammonium chloride, potassium hydrogen sulfide, and ethanedithiol. We find that each reagent induces unique changes in the structure and composition of the resulting solid, giving rise to films that vary from insulating to, in the case of thiocyanate, conducting with a remarkably low resistivity of 8.8×10(-6) ?·cm, only 6 times that of bulk silver. We show that thiocyanate mediates the spontaneous sintering of nanocrystals into structures with a roughness of less than 1/10th of the wavelength of visible light. We demonstrate that these solution-processed, low-resistivity, optically smooth films can be patterned, using imprint lithography, into conductive electrodes and plasmonic mesostructures with programmable resonances. We observe that thiocyanate-treated solids exhibit significantly retarded atmospheric corrosion, a feature that dramatically increases the feasibility of employing silver for electrical and plasmonic applications. PMID:24484271

Fafarman, Aaron T; Hong, Sung-Hoon; Oh, Soong Ju; Caglayan, Humeyra; Ye, Xingchen; Diroll, Benjamin T; Engheta, Nader; Murray, Christopher B; Kagan, Cherie R

2014-03-25

105

The Interferon-Induced Gene ISG15 Blocks Retrovirus Release from Cells Late in the Budding Process?  

PubMed Central

The release of retroviruses from cells requires ubiquitination of Gag and recruitment of cellular proteins involved in endosome sorting, including the ESCRT-III proteins and the Vps4 ATPase. In response to infection, cells have evolved an interferon-induced mechanism to block virus replication through expression of the interferon-stimulated gene 15 (ISG15), a dimer homologue of ubiquitin, which interferes with ubiquitin pathways in cells. Previously, it has been reported that ISG15 expression inhibited the E3 ubiquitin ligase, Nedd4, and prevented association of the ESCRT-I protein Tsg101 with human immunodeficiency virus type 1 (HIV-1) Gag. The budding of avian sarcoma leukosis virus and HIV-1 Gag virus-like particles containing L-domain mutations can be rescued by fusion to ESCRT proteins, which cause entry into the budding pathway beyond these early steps. The release of these fusions from cells was susceptible to inhibition by ISG15, indicating that there was a block late in the budding process. We now demonstrate that the Vps4 protein does not associate with the avian sarcoma leukosis virus or the HIV-1 budding complexes when ISG15 is expressed. This is caused by a loss in interaction between Vps4 with its coactivator protein LIP5 needed to promote the formation of the ESCRT-III-Vps4 double-hexamer complex required for membrane scission and virus release. The inability of LIP5 to interact with Vps4 is the probable result of ISG15 conjugation to the ESCRT-III protein, CHMP5, which regulates the availability of LIP5. Thus, there appear to be multiple levels of ISG15-induced inhibition acting at different stages of the virus release process. PMID:20164219

Pincetic, Andrew; Kuang, Zhizhou; Seo, Eun Joo; Leis, Jonathan

2010-01-01

106

The projection diagram  

NASA Astrophysics Data System (ADS)

We describe a diagram, named the projection diagram (PD), that can be used for the interpretation of fringe projection operations in a similar way as the Holodiagram is used in holography and other branches in optics. It is obtained as a Moiré pattern between two spoke targets that mimic central projections, the same as those in a projection and observation system or two projection systems. N. Abramson [Academic, London (1981)] has already proposed its use in systems with two observation points (i.e., stereoscopic observation). By using this PD, several interesting features dealing with fringe projection are highlighted. Information on the sensitivity vector and the geometry of the contouring surfaces can be straightforwardly obtained in a graphical way. The effect of defocusing can also be included in the diagram.

Muramatsu, Mikaya; Torroba, Patricia; Cap, Nelly; Rabal, Hector

2003-08-01

107

Simulation of plasma based semiconductor processing using block structured locally refined grids  

SciTech Connect

We have described a new numerical method for plasma simulation. Calculations have been presented which show that the method is accurate and suggest the regimes in which the method provides savings in CPU time and memory requirements. A steady state simulation of a four centimeter domain was modeled with sheath scale (150 microns) resolution using only 40 grid points. Simulations of semiconductor processing equipment have been performed which imply the usefulness of the method for engineering applications. It is the author`s opinion that these accomplishments represent a significant contribution to plasma simulation and the efficient numerical solution of certain systems of non-linear partial differential equations. More work needs to be done, however, for the algorithm to be of practical use in an engineering environment. Despite our success at avoiding the dielectric relaxation timestep restrictions the algorithm is still conditionally stable and requires timesteps which are relatively small. This represents a prohibitive runtime for steady state solutions on high resolution grids. Current research suggests that these limitations may be overcome and the use of much larger timesteps will be possible.

Wake, D.D.

1998-01-01

108

Carbon Cycle Diagram  

NSDL National Science Digital Library

This diagram illustrates some of the most abundant stores of carbon and identifies some of the pathways in the carbon cycle along which carbon is transferred from one form to another. Long-term sinks of carbon are labelled in black; shorter-term fluxes are labelled in purple. Amounts are in billions of tons.

2011-07-12

109

Impulse-Momentum Diagrams  

ERIC Educational Resources Information Center

Multiple representations are a valuable tool to help students learn and understand physics concepts. Furthermore, representations help students learn how to think and act like real scientists. These representations include: pictures, free-body diagrams, energy bar charts, electrical circuits, and, more recently, computer simulations and…

Rosengrant, David

2011-01-01

110

Interactive Molecular Orbital Diagrams  

NSDL National Science Digital Library

Here is an application for constructing the molecular orbital electron configurations of heteronuclear diatomic molecules. Energy level diagrams are given for the two different cases encountered in heteronuclear diatomics of the first short period (Li2 - Ne2). This is a useful tool for having students explore questions of bond order, magnetic properties and numbers of unpaired electrons.

111

Venn Diagrams and Logic  

NSDL National Science Digital Library

This math lesson from Illuminations uses Venn diagrams to illustrate direct, indirect and transitive reasoning. Students will learn the definitions of direct, indirect and transitive reasoning and give examples of each. Several student activity sheets are included. The material is intended for grades 9-12 and should require 2 and a half class periods to complete.

2011-01-04

112

Diagramming the Never Ending Story: Student-generated diagrammatic stories integrate and retain science concepts improving science literacy  

Microsoft Academic Search

This research examined an instructional strategy called Diagramming the Never Ending Story: A method called diagramming was taught to sixth grade students via an outdoor science inquiry ecology unit. Students generated diagrams of the new ecology concepts they encountered, creating explanatory 'captions' for their newly drawn diagrams while connecting them in a memorable story. The diagramming process culminates in 20-30

Ralph T. Pillsbury

2008-01-01

113

An Introduction to Tree Diagrams  

NSDL National Science Digital Library

This brief article describes the use of tree diagrams in calculating probabilities. The author provides examples of how tree diagrams are used to calculate specific probabilities and why the language chosen relates to the operations used to find the probability.

Cork, Stu

2014-01-01

114

Voronoi diagrams for planar shapes  

Microsoft Academic Search

Although many algorithms compute Voronoi diagrams for polygons, few do so for shapes bounded by arbitrary closed curves. The paper presents an algorithm which does this. It also traces the diagrams directly from their differential properties

J. J. Chou

1995-01-01

115

Impulse-Momentum Diagrams  

Microsoft Academic Search

Multiple representations are a valuable tool to help students learn and understand physics concepts.1 Furthermore, representations help students learn how to think and act like real scientists.2 These representations include: pictures, free-body diagrams,3 energy bar charts,4 electrical circuits, and, more recently, computer simulations and animations.5 However, instructors have limited choices when they want to help their students understand impulse and

David Rosengrant

2011-01-01

116

HW: A diagram that list the major processes involved in your biofuel production pathway, along with the relevant chemical inputs and products/emissions. The example from Corn Ethanol in lecture has been included as a guide. (Due Sunday by Midnight, one pe  

E-print Network

HW: A diagram that list the major processes involved in your biofuel production pathway, along with the relevant chemical inputs and products/emissions. The example from Corn Ethanol in lecture has been included

Iglesia, Enrique

117

Feynman diagram drawing made easy  

NASA Astrophysics Data System (ADS)

We present a drawing package optimised for Feynman diagrams. These can be constructed interactively with a mouse-driven graphical interface or from a script file, more suitable to work with a diagram generator. It provides most features encountered in Feynman diagrams and allows to modify every part of a diagram after its creation. Special attention has been paid to obtain a high quality printout as easily as possible. This package is written in Tcl/Tk and in C.

Baillargeon, Marc; Nogueira, P.

1997-02-01

118

Additive-Driven Assembly of Block Copolymer-Nanoparticle Hybrid Materials for Solution Processable Floating Gate Memory  

NASA Astrophysics Data System (ADS)

The preparation of well-ordered hybrid materials at nanoscale is not only fundamentally interesting but also of significant importance for the development of next generation functional devices. In this study, we present a simple approach for the preparation of well-ordered polymer/NP composites through the concept of additive-driven assembly, and its application for the fabrication of floating gate organic FET memory devices. The addition of gold NPs that selectively hydrogen bond with pyridine in poly(styrene-b-2-vinyl pyridine) is shown to induce an ordered structure. This enables the fabrication of well-ordered hybrid materials with lamellar domains at Au NP loadings of more than 40 wt%. The fabrication of floating gate memory devices was demonstrated by the ordered Au NPs / block copolymer hybrid film as a charge trapping layer, which is sandwiched between a SiO2 dielectric layer and a poly(3-hexylthiophene) semiconductor layer. This approach enables us to fabricate well-ordered charge storage layers by solution processing and to achieve facile control of the memory windows by changing the density of gold NPs. The devices show high carrier mobility (> 0.1 cm^2/Vs), controllable memory windows (0˜50V), high on/off ratio (>10^5) between memory states and long retention times (>10^4 s). This approach is potentially suitable for roll-to-roll printing techniques to make flexible, large area and high density devices.

Wei, Qingshuo; Lin, Ying; Anderson, Eric; Briseno, Alejandro; Gido, Samuel; Watkins, James

2012-02-01

119

Dispersion polymerization of methyl acrylate in nonpolar solvent stabilized by block copolymers formed in situ via the RAFT process.  

PubMed

The free-radical dispersion polymerization of methyl acrylate (MA) in isododecane was carried out in the presence of a poly(2-ethylhexyl acrylate) macromolecular RAFT (reversible addition-fragmentation chain transfer) agent bearing a trithiocarbonate reactive group in the middle of the chain (P2EHA-TTC). The presence of the trithiocarbonate function was crucial for the synthesis of monodisperse colloidal poly(methyl acrylate) (PMA) particles stabilized by the P2EHA segments. The hydrodynamic diameters ranged from 100 to 300 nm, using particularly low amounts of the macro(RAFT agent) (1-6 wt % vs. MA) in dispersion polymerizations carried out at 20 wt % solids content. As shown by 2D liquid chromatography, P2EHA-b-PMA or P2EHA-b-PMA-b-P2EHA block copolymers formed in situ at the early stage of the dispersion polymerization due to the reversible transfer process and played the role of particle stabilizer. The glass-transition temperature of the derived polymer films was not affected by the low amount of the chosen macromolecular stabilizer and the mechanical properties were mainly those of PMA, which makes the technique very attractive for coating applications. PMID:20356189

Houillot, Lisa; Bui, Chuong; Farcet, Céline; Moire, Claudine; Raust, Jacques-Antoine; Pasch, Harald; Save, Maud; Charleux, Bernadette

2010-02-01

120

Valves - current operating experience of slurry valves (block and letdown) in coal liquefaction processes. Third quarter report  

SciTech Connect

This paper summarizes the recent letdown and block valve experience in the liquefaction pilot plants. Also included is a brief description of the research and development activities on valves which are conducted in supporting laboratories. The purpose of the summary is to concentrate on critical component problems common to all liquefaction plants, to avoid duplication of efforts, and to help provide timely solutions to the valve problems. The main source of information used in this paper is the Minutes of the Critical Component and Materials Meeting which is sponsored by the Office of Coal Processing, Fossil Energy, Department of Energy. Other sources of information such as the technical progress reports are also included based on availability and relevance to topics covered in this paper. It is intended that this report will be followed by updates as pertinent information concerning valves becomes available. In the subsequent sections of this paper a brief outline of past valve studies is given as background material followed by a summary of the most recent valve operating experience at the liquefaction plants.

NONE

1996-07-01

121

U.S. data processing for the IRAS project  

Microsoft Academic Search

The JPL's Scientific Data Analysis System (SDAS), which will process IRAS data and produce a catalogue of perhaps a million infrared sources in the sky, as well as other information for astronomical records, is described. The purposes of SDAS are discussed, and the major SDAS processors are shown in block diagram. The catalogue processing is addressed, mentioning the basic processing

J. H. Duxbury

1983-01-01

122

Solution processable colloidal nanoplates as building blocks for high-performance electronic thin films on flexible substrates.  

PubMed

Low-temperature solution-processed electronic materials on plastic substrates are of considerable interest for flexible electronics. Solution dispersible inorganic nanostructures (e.g., zero-dimensional (0D) quantum dots or one-dimensional (1D) nanowires) have emerged as interesting ink materials for low-temperature solution processing of electronic thin films on flexible substrates, but usually with limited performance due to the large number of grain boundaries (0D) or incomplete surface coverage (1D). Here, we report two-dimensional (2D) colloidal nanoplates of layered materials as a new ink material for solution assembly of high-performance electronic thin films. The 2D colloidal nanoplates exhibit few dangling bonds and represent an ideal geometry for the assembly of highly uniform continuous thin films with greatly reduced grain boundaries dictated by large-area conformal plane-plane contact with atomically flat/clean interfaces. It can therefore promise efficient charge transport across neighboring nanoplates and throughout the entire thin film to enable unprecedented electronic performance. We show that Bi2Se3 and Bi2Te3 nanoplates can be synthesized with well-controlled thickness (6-15 nm) and lateral dimension (0.5-3 ?m) and can be used for the assembly of highly uniform continuous thin films with a full surface coverage and an excellent room temperature carrier mobility >100 cm(2)·V(-1)·s(-1), approaching that of chemical vapor deposition grown materials. Our study demonstrates a general strategy to using 2D nanoplates as a unique building block for the construction of high-performance electronic thin films on plastic substrates for future flexible electronics and optoelectronics. PMID:25343683

Lin, Zhaoyang; Chen, Yu; Yin, Anxiang; He, Qiyuan; Huang, Xiaoqing; Xu, Yuxi; Liu, Yuan; Zhong, Xing; Huang, Yu; Duan, Xiangfeng

2014-11-12

123

When a Writer Can't Write: Studies in Writer's Block and Other Composing-Process Problems. Perspectives in Writing Research Series.  

ERIC Educational Resources Information Center

The essays in this book address various cognitive and emotional dimensions of disrupted composing and describe some of the situational variables that can contribute to it. The titles and authors are as follows: "Blocking and the Young Writer" (Donald H. Graves); "Emotional Scenarios in the Writing Process: An Examination of Young Writers'…

Rose, Mike, Ed.

124

Control and Data Flow Testing on Function Block Diagrams  

E-print Network

an indispensable step required to assure software quality. In the nuclear power plant control system, as existing. Moreover, generating intermediate code leads to additional cost. In this paper, we propose a direct cost-efficient

Jee, Eunkyoung

125

Adaptive techniques for signal processing in communications  

NASA Astrophysics Data System (ADS)

The basic characteristics of adaptive signal processing techniques are described. Consideration is given to adaptive equalization; adaptive echo cancellation; adaptive noise cancellation; and linear predictive coding. The principle classes of signal processing systems are discussed, including: adaptive systems identification systems; signal estimation systems; and signal correction systems. The main components of adaptive processing routines are also described, with attention given to a priori knowledge; quality criteria; adaptive signal processing algorithms; and gradients methods. Block diagrams of the different adaptive processing systems are provided.

Claasen, T. A. C. M.; Mecklenbraeuker, W. F. G.

1985-11-01

126

APRICODD: Approximate Policy Construction Using Decision Diagrams  

Microsoft Academic Search

We propose a method of approximate dynamic programming for Markov decision processes (MDPs) using algebraic decision diagrams (ADDs). We produce near-optimal value functions and policies with much lower time and space requirements than exact dynamic programming. Our method reduces the sizes of the intermediate value functions generated during value iteration by replacing the values at the terminals of the ADD

Robert St-aubin; Jesse Hoey; Craig Boutilier

2000-01-01

127

Impact decision support diagrams  

NASA Astrophysics Data System (ADS)

One way to frame the job of planetary defense is to “find the optimal approach for finding the optimal approach” to NEO mitigation. This requires a framework for defining in advance what should be done under various circumstances. The two-dimensional action matrix from the recent NRC report “Defending Planet Earth” can be generalized to a notional “Impact Decision Support Diagram” by extending it into a third dimension. The NRC action matrix incorporated two important axes: size and time-to-impact, but probability of impact is also critical (it is part of the definitions of both the Torino and Palermo scales). Uncertainty has been neglected, but is also crucial. It can be incorporated by subsuming it into the NEO size axis by redefining size to be three standard deviations greater than the best estimate, thereby providing a built-in conservative margin. The independent variable is time-to-impact, which is known with high precision. The other two axes are both quantitative assessments of uncertainty and are both time dependent. Thus, the diagram is entirely an expression of uncertainty. The true impact probability is either one or zero, and the true size does not change. The domain contains information about the current uncertainty, which changes with time (as opposed to reality, which does not change).

Boslough, Mark

2014-10-01

128

Visualization design and verification of Ada tasking using timing diagrams  

NASA Technical Reports Server (NTRS)

The use of timing diagrams is recommended in the design and testing of multi-task Ada programs. By displaying the task states vs. time, timing diagrams can portray the simultaneous threads of data flow and control which characterize tasking programs. This description of the system's dynamic behavior from conception to testing is a necessary adjunct to other graphical techniques, such as structure charts, which essentially give a static view of the system. A series of steps is recommended which incorporates timing diagrams into the design process. Finally, a description is provided of a prototype Ada Execution Analyzer (AEA) which automates the production of timing diagrams from VAX/Ada debugger output.

Vidale, R. F.; Szulewski, P. A.; Weiss, J. B.

1986-01-01

129

Using Eye Tracking to Investigate Semantic and Spatial Representations of Scientific Diagrams During Text-Diagram Integration  

NASA Astrophysics Data System (ADS)

We investigated strategies used by readers when reading a science article with a diagram and assessed whether semantic and spatial representations were constructed while reading the diagram. Seventy-one undergraduate participants read a scientific article while tracking their eye movements and then completed a reading comprehension test. Our results showed that the text-diagram referencing strategy was commonly used. However, some readers adopted other reading strategies, such as reading the diagram or text first. We found all readers who had referred to the diagram spent roughly the same amount of time reading and performed equally well. However, some participants who ignored the diagram performed more poorly on questions that tested understanding of basic facts. This result indicates that dual coding theory may be a possible theory to explain the phenomenon. Eye movement patterns indicated that at least some readers had extracted semantic information of the scientific terms when first looking at the diagram. Readers who read the scientific terms on the diagram first tended to spend less time looking at the same terms in the text, which they read after. Besides, presented clear diagrams can help readers process both semantic and spatial information, thereby facilitating an overall understanding of the article. In addition, although text-first and diagram-first readers spent similar total reading time on the text and diagram parts of the article, respectively, text-first readers had significantly less number of saccades of text and diagram than diagram-first readers. This result might be explained as text-directed reading.

Jian, Yu-Cin; Wu, Chao-Jung

2014-10-01

130

Optoelectronics using block copolymers.  

SciTech Connect

Block copolymers, either as semiconductors themselves or as structure directors, are emerging as a promising class of materials for understanding and controlling processes associated with both photovoltaic energy conversion and light emitting devices.

Botiz, I.; Darling, S. B.; Center for Nanoscale Materials

2010-05-01

131

(?, ?) uniform-scale chromaticity diagram  

NASA Astrophysics Data System (ADS)

The non-uniformity of scale in the usual chromaticity diagrams is a very old problem in colour measurements. This program computes the transformation from the CIE 1931 ( x, y) chromaticity diagram to the recent uniform scale (?, ?) diagram and vice-versa. Moreover the program evaluates the most important colorimetric quantities for a comparison with the experimental data. Finally the chromatic gamut needed for TV applications is shown.

Oleari, Claudio; Formaleoni, Guido

1992-02-01

132

Generating function for web diagrams  

NASA Astrophysics Data System (ADS)

We present the description of the exponentiated diagrams in terms of generating function within the universal diagrammatic technique. In particular, we show the exponentiation of the gauge theory amplitudes involving products of an arbitrary number of Wilson lines of arbitrary shapes, which generalizes the concept of web diagrams. The presented method gives a new viewpoint on the web diagrams and proves the non-Abelian exponentiation theorem.

Vladimirov, A. A.

2014-09-01

133

Box diagram in Yukawa theory  

SciTech Connect

We present a light-front calculation of the box diagram in Yukawa theory. The covariant box diagram is finite for the case of spin-1/2 constituents exchanging spin-0 particles. In light-front dynamics, however, individual time-ordered diagrams are divergent. We analyze the corresponding light-front singularities and show the equivalence between the light-front and covariant results by taming the singularities.

Bakker, Bernard L. G.; Boomsma, Jorn K. [Department of Physics and Astrophysics, Vrije Universiteit, De Boelelaan 1081, NL-1081 HV Amsterdam (Netherlands); Ji, Chueng-Ryong [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695-8202 (United States)

2007-03-15

134

Thinking Blocks  

NSDL National Science Digital Library

Thinking Blocks is an interactive Flash tool for modeling and solving math problems visually. Students represent quantities and relationships by placing blocks and braces on a work space and using the tools to resize and label them accordingly. Users can change the color of blocks, move them, copy them, divide them into equal parts, and separate them. A pencil tool and keyboard are also available. The site includes video tutorials demonstrating how to use the tool and how to model a wide variety of problem types. It also contains a bank of hundreds of word problems.

2011-01-01

135

Diagonal Slices of 3D Young Diagrams in the Approach of Maya Diagrams  

NASA Astrophysics Data System (ADS)

According to the correspondence between 2D Young diagrams and Maya diagrams and the relation between 2D and 3D Young diagrams, we construct 3D Young diagrams in the approach of Maya diagrams. Moreover, we formulate the generating function of 3D Young diagrams, which is the MacMahon function in terms of Maya diagrams.

Cai, Li-Qiang; Wang, Li-Fang; Wu, Ke; Yang, Jie

2014-09-01

136

Geotechnical properties and their relation to geologic processes in south pass outer continental shelf lease area blocks 28, 47 and 48, offshore Louisiana  

E-print Network

of sediments from fi ve bori ngs located in South Pass, Outer Continental Shelf, Blocks 28, 47 and 48 have been investigated to establish more clearly their re'lationship to the geol ogi c processes associated with the Mississippi delta co uplex... . Variations in the geotechni cal properties are related to changes in depositional environments and the corresponding fluctu- ations in sedimentation rates and source material. Peripheral lumping may affert these proper ties to depths greater than 30...

Shephard, Les Edward

2012-06-07

137

Better Blocks  

E-print Network

a public right-of-way for the following uses is: (4) Fee for awnings and canopies: $1,000 per awning or canopy. Team Better Block ? Jason Roberts ? jason@teambetterblock.com ? www.betterblock.com ... a public right-of-way for the following uses is: (4) Fee for awnings and canopies: $1,000 per awning or canopy. Team Better Block ? Jason Roberts ? jason@teambetterblock.com ? www.betterblock.com ...

Roberts, J.

2011-01-01

138

Geometric Relations Among Voronoi Diagrams  

Microsoft Academic Search

Two general classes of Voronoi diagrams are introduced and, along with their modifications to higher order, are shown to be geometrically related. This geometric background, on one hand, serves to analyze the size and the combinatorial structure, and on the other hand, implies general and efficient methods of construction, for various important types of Voronoi diagrams considered in the literature.

Franz Aurenhammer; Hiroshi Imai

1987-01-01

139

Voronoi diagrams and Delaunay triangulations  

Microsoft Academic Search

IntroductionThe Voronoi diagram of a set of sites partitions space into regions, one per site; theregion for a site s consists of all points closer to s than to any other site. The dual ofthe Voronoi diagram, the Delaunay triangulation, is the unique triangulation so thatthe circumsphere of every triangle contains no sites in its interior. Voronoi diagramsand Delaunay triangulations

Steven Fortune

1995-01-01

140

Potential-pH Diagrams.  

ERIC Educational Resources Information Center

Potential-pH diagrams show the domains of redoxpotential and pH in which major species are most stable. Constructing such diagrams provides students with opportunities to decide what species must be considered, search literature for equilibrium constants and free energies of formation, and practice in using the Nernst equation. (Author/JN)

Barnum, Dennis W.

1982-01-01

141

Spider Diagrams: A Diagrammatic Reasoning System  

Microsoft Academic Search

Spider diagrams combine and extend Venn diagrams and Euler circles to express constraints on sets and their relationships with other sets. These diagrams can be used in conjunction with object-oriented modelling notations such as the Unified Modelling Language. This paper summarises the main syntax and semantics of spider diagrams. It also introduces inference rules for reasoning with spider diagrams and

John Howse; Fernando Molina; John Taylor; Stuart Kent; JOSEPH YOSSI GIL

2001-01-01

142

Highly efficient hybrid thin-film solar cells using a solution-processed hole-blocking layer.  

PubMed

We report the origin of the improvement of the power conversion efficiency (PCE) of hybrid thin-film solar cells when a soluble C(60) derivative, [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM), is introduced as a hole-blocking layer. The PCBM layer could establish better interfacial contact by decreasing the reverse dark-saturation current density, resulting in a decrease in the probability of carrier recombination. The PCE of this optimized device reached a maximum value of 8.34% and is the highest yet reported for hybrid thin-film solar cells. PMID:23258449

Seo, Ji Hoon; Kim, Dong-Ho; Kwon, Se-Hun; Park, Yun Chang; Jung, Hyung Hwan; Lee, Hyung Woo; Kwon, Jung-Dae; Park, Sung-Gyu; Nam, Kee-Seok; Jeong, Yongsoo; Ryu, Seung Yoon; Kang, Jae-Wook; Kim, Chang Su

2013-02-14

143

Concrete and abstract Voronoi diagrams  

SciTech Connect

The Voronoi diagram of a set of sites is a partition of the plane into regions, one to each site, such that the region of each site contains all points of the plane that are closer to this site than to the other ones. Such partitions are of great importance to computer science and many other fields. The challenge is to compute Voronoi diagrams quickly. The problem is that their structure depends on the notion of distance and the sort of site. In this book the author proposes a unifying approach by introducing abstract Voronoi diagrams. These are based on the concept of bisecting curves which are required to have some simple properties that are actually possessed by most bisectors of concrete Voronoi diagrams. Abstract Voronoi diagrams can be computed efficiently and there exists a worst-case efficient algorithm of divide-and-conquer type that applies to all abstract Voronoi diagrams satisfying a certain constraint. The author shows that this constraint is fulfilled by the concrete diagrams based no large classes of metrics in the plane.

Klein, R. (Universitat-Gesamthochschule Essen (DE))

1989-01-01

144

Do students use and understand free-body diagrams?  

NSDL National Science Digital Library

Physics education literature recommends using multiple representations to help students understand concepts and solve problems. However, there is little research concerning why students use the representations and whether those who use them are more successful. This study addresses these questions using free-body diagrams (diagrammatic representations used in problems involving forces) as a type of representation. We conducted a two-year quantitative and qualitative study of studentsâ use of free-body diagrams while solving physics problems. We found that when students are in a course that consistently emphasizes the use of free-body diagrams, the majority of them do use diagrams on their own to help solve exam problems even when they receive no credit for drawing the diagrams. We also found that students who draw diagrams correctly are significantly more successful in obtaining the right answer for the problem. Lastly, we interviewed students to uncover their reasons for using free-body diagrams. We found that high achieving students used the diagrams to help solve the problems and as a tool to evaluate their work while low achieving students only used representations as aids in the problem-solving process.

Rosengrant, David; Van Heuvelen, Alan; Etkina, Eugenia

2010-06-29

145

Do students use and understand free-body diagrams?  

NSDL National Science Digital Library

Physics education literature recommends using multiple representations to help students understand concepts and solve problems. However, there is little research concerning why students use the representations and whether those who use them are more successful. This study addresses these questions using free-body diagrams (diagrammatic representations used in problems involving forces) as a type of representation. We conducted a two-year quantitative and qualitative study of studentsâ use of free-body diagrams while solving physics problems. We found that when students are in a course that consistently emphasizes the use of free-body diagrams, the majority of them do use diagrams on their own to help solve exam problems even when they receive no credit for drawing the diagrams. We also found that students who draw diagrams correctly are significantly more successful in obtaining the right answer for the problem. Lastly, we interviewed students to uncover their reasons for using free-body diagrams. We found that high achieving students used the diagrams to help solve the problems and as a tool to evaluate their work while low achieving students only used representations as aids in the problem-solving process.

Rosengrant, David; Van Heuvelen, Alan; Etkina, Eugenia

2014-03-31

146

Development and Application of a Rubric for Analysis of Novice Students' Laboratory Flow Diagrams  

ERIC Educational Resources Information Center

The purpose of this study was to develop and apply a scheme for the analysis of flow diagrams. The flow diagrams in question are a schematic representation of written instructions that require students to process the text of their practical manual. It was hoped that an analysis of the flow diagrams would provide insight into students'…

Davidowitz, Bette; Rollnick, Marissa; Fakudze, Cynthia

2005-01-01

147

The design of an intrusion security system using digital processing for alarm indication  

E-print Network

Detector. . . 6. Block diagram of the linear processing circuitry. . 20 7. Schematic for 2 Hz high-pass filter 23 8. Interconnections for Burr-Brown notch filters. . 9. Schematic of the 210 Hz low-pass filter. . . . . . . . 25 27 10. Plot of log... Detector. . . 6. Block diagram of the linear processing circuitry. . 20 7. Schematic for 2 Hz high-pass filter 23 8. Interconnections for Burr-Brown notch filters. . 9. Schematic of the 210 Hz low-pass filter. . . . . . . . 25 27 10. Plot of log...

Holyoak, Joel Nelson

2012-06-07

148

Diagrams of States in Quantum Information: an Illustrative Tutorial  

E-print Network

We present "Diagrams of States", a way to graphically represent and analyze how quantum information is elaborated during the execution of quantum circuits. This introductory tutorial illustrates the basics, providing useful examples of quantum computations: elementary operations in single-qubit, two-qubit and three-qubit systems, immersions of gates on higher dimensional spaces, generation of single and multi-qubit states, procedures to synthesize unitary, controlled and diagonal matrices. To perform the analysis of quantum processes, we directly derive diagrams of states from physical implementations of quantum circuits associated to the processes. Complete diagrams are then rearranged into simplified diagrams, to visualize the overall effects of computations. Conversely, diagrams of states help to conceive new quantum algorithms, by schematically describing desired manipulations of quantum information with intuitive diagrams and then by guessing the equivalent complete diagrams, from which the corresponding quantum circuit is obtained effortlessly. Related examples and analysis of complex algorithms will be provided in future works, for whose comprehension this first tutorial offers the necessary introduction.

Sara Felloni; Alberto Leporati; Giuliano Strini

2009-04-17

149

Formation of sub-7 nm feature size PS-b-P4VP block copolymer structures by solvent vapour process  

NASA Astrophysics Data System (ADS)

The nanometer range structure produced by thin films of diblock copolymers makes them a great of interest as templates for the microelectronics industry. We investigated the effect of annealing solvents and/or mixture of the solvents in case of symmetric Poly (styrene-block-4vinylpyridine) (PS-b-P4VP) diblock copolymer to get the desired line patterns. In this paper, we used different molecular weights PS-b-P4VP to demonstrate the scalability of such high ? BCP system which requires precise fine-tuning of interfacial energies achieved by surface treatment and that improves the wetting property, ordering, and minimizes defect densities. Bare Silicon Substrates were also modified with polystyrene brush and ethylene glycol self-assembled monolayer in a simple quick reproducible way. Also, a novel and simple in situ hard mask technique was used to generate sub-7nm Iron oxide nanowires with a high aspect ratio on Silicon substrate, which can be used to develop silicon nanowires post pattern transfer.

Chaudhari, Atul; Ghoshal, Tandra; Shaw, Matthew T.; Cummins, Cian; Borah, Dipu; Holmes, Justin D.; Morris, Michael A.

2014-03-01

150

A Block-Matrix Method for Course Development  

ERIC Educational Resources Information Center

Describes the block-matrix method, a technique used to develop new training programs (commonly involving educational program developers and community representatives). Two examples of the block-matrix application and supplementary diagrams are included. It is noted that this method has been used successfully in the development of new courses for…

Greenaway, John

1977-01-01

151

Suppression of the four-wave-mixing background noise in a quantum memory retrieval process by channel blocking  

NASA Astrophysics Data System (ADS)

In a quantum memory scheme with the Raman process, the read process encounters noise from four-wave mixing (FWM), which can destroy the nonclassical properties of the generated quantum fields. Here we demonstrate experimentally that the noise from FWM can be greatly suppressed by simply reducing the FWM transition channels with a circularly polarized read beam while at the same time retaining relatively high retrieval efficiency.

Zhang, Kai; Guo, Jinxian; Chen, L. Q.; Yuan, Chunhua; Ou, Z. Y.; Zhang, Weiping

2014-09-01

152

Automatically Assessing Graph-Based Diagrams  

ERIC Educational Resources Information Center

To date there has been very little work on the machine understanding of imprecise diagrams, such as diagrams drawn by students in response to assessment questions. Imprecise diagrams exhibit faults such as missing, extraneous and incorrectly formed elements. The semantics of imprecise diagrams are difficult to determine. While there have been…

Thomas, Pete; Smith, Neil; Waugh, Kevin

2008-01-01

153

DRAWING DIAGRAMS IN AN ONLINE EXAMINATION  

Microsoft Academic Search

This paper describes a study into the drawing of diagrams in an online examination. The diagrams were produced by students during an on-line examination using a simple drawing tool. The students' examination answers, which included a diagram, were submitted over the Internet to an automatic marking tool for grading and feedback. This paper describes the diagram drawing tool and discusses

Pete Thomas

154

Phase diagrams and crystal growth  

NASA Astrophysics Data System (ADS)

Phase diagrams are briefly treated as generalized property-composition relationships, with respect to crystal technology optimization. The treatment is based on mutual interaction of three systems related to semiconductors: (a) the semiconducting material systems, (b0 the data bank, (c) the system of crystallization methods. A model is proposed enabling optimatization on the path from application requirements to the desired material. Further, several examples of the selection as to the composition of LED and laser diode material are given. Some of molten-solution-zone methods are being successfully introduced for this purpose. Common features of these methods, the application of phase diagrams, and their pecularities compared with other crystallization methods are illustrated by schematic diagrams and by examples. LPE methods, particularly the steady-state LPE methods such as Woodall's ISM and Nishizawa's TDM-CVP, and the CAM-S (Crystallization Method Providing Composition Autocontrol in Situ) have been chosen as examples. Another approach of exploiting phase diagrams for optimal material selection and for determination of growth condition before experimentation through a simple calculation is presented on InP-GaP solid solutions. Ternary phase diagrams are visualized in space through calculation and constructions based on the corresponding thermodynamic models and anaglyphs. These make it easy to observe and qualitatively analyze the crystallization of every composition. Phase diagrams can be also used as a powerful tool for the deduction of new crystallization methods. Eutectic crystallization is an example of such an approach where a modified molten-solution-zone method can give a sandwich structure with an abrupt concentration change. The concentration of a component can range from 0 to 100% in the different solid phases.

Venkrbec, Jan

1980-04-01

155

Block Oriented Simulation System (BOSS)  

NASA Technical Reports Server (NTRS)

Computer simulation is assuming greater importance as a flexible and expedient approach to modeling system and subsystem behavior. Simulation has played a key role in the growth of complex, multiple access space communications such as those used by the space shuttle and the TRW-built Tracking and Data Relay Satellites (TDRS). A powerful new simulator for use in designing and modeling the communication system of NASA's planned Space Station is being developed. Progress to date on the Block (Diagram) Oriented Simulation System (BOSS) is described.

Ratcliffe, Jaimie

1988-01-01

156

Diagram of Zeolite Crystals  

NASA Technical Reports Server (NTRS)

The Center for Advanced Microgravity Materials Processing (CAMMP) in Cambridge, MA, a NASA-sponsored Commercial Space Center, is working to improve zeolite materials for storing hydrogen fuel. CAMMP is also applying zeolites to detergents, optical cables, gas and vapor detection for environmental monitoring and control, and chemical production techniques that significantly reduce by-products that are hazardous to the environment. Depicted here is one of the many here complex geometric shapes which make them highly absorbent. Zeolite experiments have also been conducted aboard the International Space Station

2003-01-01

157

The BPM to UML activity diagram transformation using XSLT  

E-print Network

business processes of an organization. Problems con- nected with a complexity of notation and missing, 118 00, Praha 1, Czech Republic karel.richta@mff.cuni.cz Abstract. The Business Process Model represented as a diagram in Business Process Modeling Notation (BPMN) is a commonly used way how to describe

158

Secretion of rat hepatic lipase is blocked by inhibition of oligosaccharide processing at the stage of glucosidase I  

Microsoft Academic Search

Rat hepatic lipase is a glycoprotein bearing two N- linked oligosaccharide chains. The importance of glycosylation in the secretion of hepatic lipase was studied using freshly isolated rat hepatocytes. Various inhibitors of oligosaccharide synthesis and processing were used at concentrations that selec- tively interfere with protein glycosylation. Secretion of hepatic lipase activity was abolished by tunicamycin, castanospermine, and N-methyldeoxynojirimycin. No

Adrie J. M. Verhoeven; Hans Jansen

159

Neuraminidase Ribbon Diagram  

NASA Technical Reports Server (NTRS)

Ribbons is a program developed at UAB used worldwide to graphically depict complicated protein structures in a simplified format. The program uses sophisticated computer systems to understand the implications of protein structures. The Influenza virus remains a major causative agent for a large number of deaths among the elderly and young children and huge economic losses due to illness. Finding a cure will have a general impact both on the basic research of viral pathologists of fast evolving infectious agents and clinical treatment of influenza virus infection. The reproduction process of all strains of influenza are dependent on the same enzyme neuraminidase. Shown here is a segmented representation of the neuraminidase inhibitor compound sitting inside a cave-like contour of the neuraminidase enzyme surface. This cave-like formation present in every neuraminidase enzyme is the active site crucial to the flu's ability to infect. The space-grown crystals of neuraminidase have provided significant new details about the three-dimensional characteristics of this active site thus allowing researchers to design drugs that fit tighter into the site. Principal Investigator: Dr. Larry DeLucas

2004-01-01

160

Block Copolymers with a Twist  

SciTech Connect

Chiral block copolymers (BCPs*) comprising chiral entities were designed to fabricate helical architectures (i.e., twisted morphologies) from self-assembly. A new helical phase (H*) with P622 symmetry was discovered in the self-assembly of poly(styrene)-b-poly(l-lactide) (PS-PLLA) BCPs*. Hexagonally packed, interdigitated PLLA helical microdomains in a PS matrix were directly visualized by electron tomography. The phase diagram of the PS-PLLA BCPs* was also established. Phase transitions from the H* phase to the stable cylinder and gyroid phases were found after long-time annealing, suggesting that the H* is a long-lived metastable phase. In contrast to racemic poly(styrene)-b-poly(d,l-lactide) BCPs, chiral interaction significantly enhances the incompatibility between achiral PS and chiral PLLA blocks in the PS-PLLA BCPs* and can be estimated through the determination of the interaction parameter.

Ho, R.; Chiang, Y; Chen, C; Wang, H; Hasegawa, H; Akasaka, S; Thomas, E; Burger, C; Hsiao, B

2009-01-01

161

Concrete and Abstract Voronoi Diagrams  

Microsoft Academic Search

The Voronoi diagram of a set of sites is a partition of the plane into regions, one to each site, such that the region of each site contains all points of the plane that are closer to this site than to the other ones. Such partitions are of great importance to computer science and many other fields. The challenge is

Rolf Klein

1989-01-01

162

Higher Order City Voronoi Diagrams  

E-print Network

We investigate higher-order Voronoi diagrams in the city metric. This metric is induced by quickest paths in the L1 metric in the presence of an accelerating transportation network of axis-parallel line segments. For the structural complexity of kth-order city Voronoi diagrams of n point sites, we show an upper bound of O(k(n - k) + kc) and a lower bound of {\\Omega}(n + kc), where c is the complexity of the transportation network. This is quite different from the bound O(k(n - k)) in the Euclidean metric. For the special case where k = n - 1 the complexity in the Euclidean metric is O(n), while that in the city metric is {\\Theta}(nc). Furthermore, we develop an O(k^2(n + c) log n)-time iterative algorithm to compute the kth-order city Voronoi diagram and an O(nc log^2(n + c) log n)-time divide-and-conquer algorithm to compute the farthest-site city Voronoi diagram.

Gemsa, Andreas; Liu, Chih-Hung; Wagner, Dorothea

2012-01-01

163

The Hubble diagram for supernovae  

Microsoft Academic Search

The distribution of 47 type I and 13 type II supernovae (SN) in the Hubble diagram is presented and evaluated. Values of the parameter Mpg(100) and the dispersion are determined by least-squares fits to various data subsets, and the results are compared with those of previous studies. Sources of scatter are considered, specifically inaccurate corrections for interstellar extinction in the

D. Branch; C. Bettis

1978-01-01

164

Precipitation and the Sounding Diagram  

NSDL National Science Digital Library

This undergraduate meteorology tutorial deals with the interplay between the vertical temperature structure of the atmosphere and the temperature of the ascending air in the formation of precipitation. Students learn about the dry and moist adiabatic lapse rates, reading and interpreting sounding diagrams, and determining the change in temperature as air parcels rise or sink.

Nielsen-Gammon, John

1996-01-01

165

Animated Diagram: Sedimentary Rock Identification  

NSDL National Science Digital Library

This Flash-enabled diagram provides a scheme for sedimentary rock identification accompanied by pop-up images of the rocks. Rolling the mouse over highlighted boxes links texture, grain size, composition, and map symbols to images of a variety of sedimentary rocks. The animation is downloadable.

166

Index of Animated Phase Diagrams  

NSDL National Science Digital Library

This is a collection of animated phase diagrams by Kenneth Windom at Iowa State University. These short Power Point animations can be used to illustrate equilibrium crystallization concepts. There are slide shows for plagioclase feldspars (albite and anorthite); forsterite, diopside and anorthite; forsterite, enstatite and silica; and diopside and anorthite.

Windom, Kenneth E.; University, Iowa S.

167

ccsd00000445, Making diagrams speak,  

E-print Network

raised by the presence of diagrams in a VIIth century Sanskrit mathematical com- mentary. Exploring di- agrammes dans un commentaire math#19;ematique en langue sanskrite datant du VII#18;eme si#18;ecle: A. Keller is a French CNRS researcher working on medieval sanskrit mathematics but also

168

Introduction to the recognition of patterns in compressed data: optical processing of data transformed by block-, transform-, and runlength-encoding, as well as vector quantization  

NASA Astrophysics Data System (ADS)

We have recently shown that the processing of compressed and encrypted imagery can achieve computational speedup and data security by processing fewer data, which are encoded in an obscure format [5- 9]. Our previous work in compressive processing produced numerous image processing algorithms that yielded computational speedups on the order of the compression ratio. In Part 1 of this series [1], we discuss the theoretical basis for pattern recognition over compressed imagery. In this paper, we present theory in support of optical or electro-optical implementations of convolution or correlation operations over block-, transform-, and runlength-encoded imagery, as well as data encoded by vector quantization (VQ). Unlike our previous work in this area, we do not derive operations that return a compressed result. Instead, our algorithms produce a map of correlation coefficients in the image domain, using a compressed image as input. Several of our architectures could, in principle, perform in time that is at least proportional to the compression ratio. Theory is expressed in terms of image algebra, an emerging branch of mathematics that unifies linear and nonlinear mathematics in the image domain. Image algebra has been implemented on a variety of workstations and parallel processors, as well as electro-optical processors. Thus our algorithms are feasible as well as portable Analyses emphasize computational complexity and information loss.

Schmalz, Mark S.

1995-03-01

169

Accuracy of fine needle aspiration biopsy processed by cytologic smear and cell block techniques for the diagnosis of lacrimal gland tumors: a study of 48 cases  

PubMed Central

Objective: To study the accuracy of fine needle aspiration biopsy (FNAB) processed by smear cytology and cell block (CB) techniques for the diagnosis of lacrimal gland tumors (LGTs). Study Design: In a prospective study, we enrolled 48 consecutive patients with LGTs. Immediately after excision of LGTs, the tissues were underwent FNAB with 23-gauge needles. The FNAB samples were processed to produce cytologic smears and CB from which slides were cut for immunohistochemical staining. The remainders were submitted for routine histopathologic processing. The diagnostic value of FNAB was assessed by comparing the FNAB diagnoses to those made by routine histopathology. Results: Cytopathologic evaluations based on smear cytology and CB with sections stained immunohistochemically can distinguish non-epithelial lesions from epithelial ones in all cases. The diagnostic sensitivities, specificities, and accuracies for distinguishing benign from malignant lesions were: cytologic smears--76%, 68%, and 71%, respectively; CB with immunohistochemical staining--88%, 87%, and 88%, respectively. The accuracy of the tissue diagnosis compared to routine histopathology was less for cytologic smears (58%) than for CB with immunohistochemistry (81%; P < 0.05). Conclusions: FNAB of LGT processed using a CB technique capable of producing immunohistochemically stained slides results in a greater percentage of accurate tissue diagnoses than do cytologic smears, when compared to routine histopathology. PMID:25120744

Wang, Xiangning; Qian, Jiang; Yuan, Yifei; Ping, Bo; Feng, Liqing; Bi, Yingwen; Li, Xiaping

2014-01-01

170

Crustal blocks and accretionnary process in the Southern Damara belt (Namibia), new insights from high-resolution airborne geophysical surveys  

NASA Astrophysics Data System (ADS)

The Damara orogen developed during the pan-African orogeny that led to the assembly of Gondwana at the end of Neoproterozoic. Interpreted as a collision belt, it is divided into a N-S trending coastal arm (the Kaoko belt) and a NE-SW striking inland branch with a width of ca. 400 km, which can be traced for more than 1500 km from Namibia into Botswana and Zambia (Miller, 1983). Subduction of the Kalahari province in the South beneath the Congo province to the North led to the highly asymmetric nature of the Damara orogen. Combined interpretation of existing geological data and new high resolution airborne geophysical data (radiometric and magnetic datasets) has been conducted in the region of Rehoboth, situated within the Southern margin and foreland of the Damara orogen. Three contrasting stages of crustal accretion are differentiated. A Late Paleoproterozoic greenstone belt is mainly composed by large volcanic and plutonic mafic sequences depleted in radioelements. A magnetite-bearing quartzite constitutes a regional marker, followed by well-defined magnetic horizons. A major ignimbrite system, followed by a stage of rifting, is developed during Mesoproterozoic. The felsic volcanic-magmatic suite represents a major input of radioelements in the crust. In general, the introduction of such large amounts of K, Th and U is associated with orogenic and/or subduction processes. Orogenic processes are unlikely as no collision tectonics are recorded during Mesoproterozoic in this zone and an active margin situation (arc, back-arc) is the most probable geodynamic context for this region. The structural pattern within the granitic massifs is marked by: (i) a NW-SE fault system, contemporaneous of granite emplacement, (ii) NE-SW lineaments, in continuity with the Southern Damara shear zone system. Finally, the Neoproterozoic Damara sequence is deposited over this basement. Continental sediments of the Nosib Group display varied sources of eroded material and variation in radioelement content. The base of the Nama marine sediments is marked by a change in radioelement source, being depleted in K-Th and slightly enriched in U. In conclusion, high-resolution geophysical surveys from Namibia provide new datasets, which can be used to produce interpreted geological maps and give new insights on successive accretionnary processes.

Ledru, P.; Becker, T.; Hutchins, D.; Milesi, J. P.; Tourliere, B.; Truffert, C.; Wackerle, R.

2003-04-01

171

Band diagrams of layered plasmonic metamaterials  

NASA Astrophysics Data System (ADS)

We introduce a method to map the band diagrams, or equipotential contours (EPCs), of any layered plasmonic metamaterial using a general expression for the Poynting vector in a lossy layered medium of finite extent under plane-wave illumination. Unlike conventional methods to get band diagrams by solving the Helmholtz equation using the Floquet-Bloch theorem (an approach restricted to infinite, periodic, lossless media), our method adopts a bottom-up philosophy based on spatial-frequency decomposition of the electric and magnetic fields (an approach applicable to finite, lossy media). Equipotential contours are used to visualize phase and group velocities in a wide range of layered plasmonic systems, including the basic building block of a thin metallic layer and more complex multi-layers with unique optical properties such as negative phase velocity, super-resolution imaging, canalization, and far-field imaging. We show that a thin metallic layer can mimic a left-handed electromagnetic response at the surface plasmon resonance and that stacks of metal and dielectric layers can do the same provided that the dielectric layer is sufficiently thin. We also use EPCs to estimate resolution limits of both Pendry's silver slab lens and the Veselago lens and show that the image location and lateral image resolution of metal-dielectric layered flat lenses can be described (and tailored) by the concavity and spectral reach of the dominant band in their EPCs. Homogenization methods for describing the effective optical properties of various layered systems are validated by the extent to which they accurately mimic features in their EPCs.

Al Shakhs, Mohammed H.; Ott, Peter; Chau, Kenneth J.

2014-11-01

172

Phase diagrams of two-lane driven diffusive systems  

NASA Astrophysics Data System (ADS)

We consider a large class of two-lane driven diffusive systems in contact with reservoirs at their boundaries and develop a stability analysis of mean-field profiles as a method to derive the phase diagrams of such systems. We illustrate the method by deriving phase diagrams for the asymmetric exclusion process coupled to various second lanes: a diffusive lane, an asymmetric exclusion process with advection in the same direction as the first lane, and an asymmetric exclusion process with advection in the opposite direction. The competing currents on the two lanes naturally lead to a very rich phenomenology and we find a variety of phase diagrams. It is shown that the stability analysis is equivalent to an 'extremal current principle' for the total current in the two lanes. We also point to classes of models where the analysis fails due to the lack of a dynamically stable current-density relation.

Evans, M. R.; Kafri, Y.; Sugden, K. E. P.; Tailleur, J.

2011-06-01

173

Automatic Code Generation From UML Class and Statechart Diagrams  

E-print Network

Fariha and our children, Rameen and Sarmad for their love, encouragement and support #12;1 Abstract of automated software tools that facilitate the development process from analysis through coding. In UML of the classes is represented by a set of statechart diagrams. To facilitate the software development process

Tanaka, Jiro

174

1095 REAL-TIME PROCESSING OF DOWNLINK PHASE MEASUREMENTS * Larry R. D'Addario  

E-print Network

The two-way time transfer link between earth station and satellite will be * *of the form shown in Figure. Fig. 1: Conceptual block diagram of the two-way time transfer. The present memo is concerned 1095 REAL-TIME PROCESSING OF DOWNLINK PHASE MEASUREMENTS

Groppi, Christopher

175

Hero's journey in bifurcation diagram  

NASA Astrophysics Data System (ADS)

The hero's journey is a narrative structure identified by several authors in comparative studies on folklore and mythology. This storytelling template presents the stages of inner metamorphosis undergone by the protagonist after being called to an adventure. In a simplified version, this journey is divided into three acts separated by two crucial moments. Here we propose a discrete-time dynamical system for representing the protagonist's evolution. The suffering along the journey is taken as the control parameter of this system. The bifurcation diagram exhibits stationary, periodic and chaotic behaviors. In this diagram, there are transition from fixed point to chaos and transition from limit cycle to fixed point. We found that the values of the control parameter corresponding to these two transitions are in quantitative agreement with the two critical moments of the three-act hero's journey identified in 10 movies appearing in the list of the 200 worldwide highest-grossing films.

Monteiro, L. H. A.; Mustaro, P. N.

2012-06-01

176

Phase Diagrams and Chemographic Projections  

NSDL National Science Digital Library

This exercise is a good way to get students thinking about the phase rule, metastable and stable reactions and phase diagrams. The exercise contains a lot of reading, and is suitable for in-class work or for homework. The idea is that students can do this on their own with little help from their instructor. The students only answer a few questions making this is more of a tutorial than a worksheet.

Perkins, Dexter

177

T-X Phase Diagrams  

NSDL National Science Digital Library

This is a 15 page tutorial and problem set designed to get students familiar with T-X diagrams, their implications, and uses. Students start by reading but, after 10-15 minutes, the room becomes noisy as they work their way through the questions at the end. Often there are "Eureka" moments as they all of a sudden grasp some fundamental principles. It is also interesting to hear them try to explain these insights to others.

Perkins, Dexter

178

Critical point analysis of phase envelope diagram  

NASA Astrophysics Data System (ADS)

Phase diagram or phase envelope is a relation between temperature and pressure that shows the condition of equilibria between the different phases of chemical compounds, mixture of compounds, and solutions. Phase diagram is an important issue in chemical thermodynamics and hydrocarbon reservoir. It is very useful for process simulation, hydrocarbon reactor design, and petroleum engineering studies. It is constructed from the bubble line, dew line, and critical point. Bubble line and dew line are composed of bubble points and dew points, respectively. Bubble point is the first point at which the gas is formed when a liquid is heated. Meanwhile, dew point is the first point where the liquid is formed when the gas is cooled. Critical point is the point where all of the properties of gases and liquids are equal, such as temperature, pressure, amount of substance, and others. Critical point is very useful in fuel processing and dissolution of certain chemicals. Here in this paper, we will show the critical point analytically. Then, it will be compared with numerical calculations of Peng-Robinson equation by using Newton-Raphson method. As case studies, several hydrocarbon mixtures are simulated using by Matlab.

Soetikno, Darmadi; Kusdiantara, Rudy; Puspita, Dila; Sidarto, Kuntjoro A.; Siagian, Ucok W. R.; Soewono, Edy; Gunawan, Agus Y.

2014-03-01

179

Causal diagrams in systems epidemiology  

PubMed Central

Methods of diagrammatic modelling have been greatly developed in the past two decades. Outside the context of infectious diseases, systematic use of diagrams in epidemiology has been mainly confined to the analysis of a single link: that between a disease outcome and its proximal determinant(s). Transmitted causes ("causes of causes") tend not to be systematically analysed. The infectious disease epidemiology modelling tradition models the human population in its environment, typically with the exposure-health relationship and the determinants of exposure being considered at individual and group/ecological levels, respectively. Some properties of the resulting systems are quite general, and are seen in unrelated contexts such as biochemical pathways. Confining analysis to a single link misses the opportunity to discover such properties. The structure of a causal diagram is derived from knowledge about how the world works, as well as from statistical evidence. A single diagram can be used to characterise a whole research area, not just a single analysis - although this depends on the degree of consistency of the causal relationships between different populations - and can therefore be used to integrate multiple datasets. Additional advantages of system-wide models include: the use of instrumental variables - now emerging as an important technique in epidemiology in the context of mendelian randomisation, but under-used in the exploitation of "natural experiments"; the explicit use of change models, which have advantages with respect to inferring causation; and in the detection and elucidation of feedback. PMID:22429606

2012-01-01

180

Teaching Tip: Using Activity Diagrams to Model Systems Analysis Techniques: Teaching What We Preach  

ERIC Educational Resources Information Center

Activity diagrams are used in Systems Analysis and Design classes as a visual tool to model the business processes of "as-is" and "to-be" systems. This paper presents the idea of using these same activity diagrams in the classroom to model the actual processes (practices and techniques) of Systems Analysis and Design. This tip…

Lending, Diane; May, Jeffrey

2013-01-01

181

Designing UML diagrams for technical documentation  

Microsoft Academic Search

This paper presents a framework for improving the presentation of Unified Modeling Language (UML) diagrams, as applied in technical documentation produced at the IBM Toronto Software Laboratory. UML diagrams are a key part of program design. They can enhance understanding of complex programming concepts, and assist in problem analysis and solution design. In turn, UML diagrams can add significant value

Neil MacKinnon; Steve Murphy

2003-01-01

182

Guelph Physics Tutorials: Free Body Diagrams  

NSDL National Science Digital Library

This website offers a tutorial on free body diagrams. The tutorial includes an introduction to free body diagrams, example problems, a series of self-paced questions, and a free body diagram java applet. This is part of series of tutorials on physics and mathematics used in physics classes.

2007-04-23

183

Illinois PER Interactive Examples: Two Blocks  

NSDL National Science Digital Library

This is an interactive homework problem for introductory physics students relating to tension forces in a system featuring an incline plane with a 30-degree angle, two blocks of known mass, and an ideal pulley. Students are required to determine the acceleration of the block moving up the incline. A user-activated "help" sequence is provided for each step of the problem-solving, including conceptual analysis, free-body diagrams, and tips to set up the calculations. To promote critical thinking, immediate feedback is received for both correct and incorrect responses. This item is part of a larger collection of interactive homework problems for introductory physics.

Gladding, Gary

2008-09-12

184

Liftings of diagrams of semilattices by diagrams of dimension groups  

E-print Network

We investigate categorical and amalgamation properties of the functor Idc assigning to every partially ordered abelian group G its semilattice of compact ideals Idc G. Our main result is the following. Theorem 1. Every diagram of finite Boolean semilattices indexed by a finite dismantlable partially ordered set can be lifted, with respect to the Idc functor, by a diagram of pseudo-simplicial vector spaces. Pseudo-simplicial vector spaces are a special kind of finite-dimensional partially ordered vector spaces (over the rationals) with interpolation. The methods introduced make it also possible to prove the following ring-theoretical result. Theorem 2. For any countable distributive join-semilattices S and T and any field K, any (v,0)-homomorphism $f: S\\to T$ can be lifted, with respect to the Idc functor on rings, by a homomorphism $f: A\\to B$ of K-algebras, for countably dimensional locally matricial algebras A and B over K. We also state a lattice-theoretical analogue of Theorem 2 (with respect to the Conc functor, and we provide counterexamples to various related statements. In particular, we prove that the result of Theorem 1 cannot be achieved with simplicial vector spaces alone.

Jiri Tuma; Friedrich Wehrung

2005-01-22

185

Liftings of diagrams of semilattices by diagrams of dimension groups.  

E-print Network

We investigate categorical and amalgamation properties of the functor Idc assigning to every partially ordered abelian group G its semilattice of compact ideals Idc G. Our main result is the following. Theorem 1. Every diagram of finite Boolean semilattices indexed by a finite dismantlable partially ordered set can be lifted, with respect to the Idc functor, by a diagram of pseudo-simplicial vector spaces. Pseudo-simplicial vector spaces are a special kind of finite-dimensional partially ordered vector spaces (over the rationals) with interpolation. The methods introduced make it also possible to prove the following ring-theoretical result. Theorem 2. For any countable distributive join-semilattices S and T and any field K, any (v,0)-homomorphism $f: S\\to T$ can be lifted, with respect to the Idc functor on rings, by a homomorphism $f: A\\to B$ of K-algebras, for countably dimensional locally matricial algebras A and B over K. We also state a lattice-theoretical analogue of Theorem 2 (with respect to the Conc functor, and we provide counterexamples to various related statements. In particular, we prove that the result of Theorem 1 cannot be achieved with simplicial vector spaces alone.

Jiri Tuma (MFF-UK); Friedrich Wehrung (LMNO).; no. 3 (2003) 1--28

186

Recent Results in Ring-Diagram Analysis  

NASA Astrophysics Data System (ADS)

The ring-diagram technique was developed by Frank Hill 25 years ago and matured quickly during the late 1990s. It is nowadays one of the most commonly used techniques in local helioseismology. The method consists in the power spectral analysis of solar acoustic oscillations on small regions (2° to 30°) of the solar surface. The power spectrum resembles a set of trumpets nested inside each other and for a given frequency, it looks like a ring, hence the technique's name. It provides information on the horizontal flow field and thermodynamic structure in the layers immediately below the photosphere. With data regularly provided by MDI, GONG, and more recently HMI, many important results have been achieved. In recently years, these results include estimations of the meridional circulation and its evolution with solar cycle; flows associated with active regions, as well as, flow divergence and vorticity, and thermal structure beneath and around active regions. Much progress is expected with data now provided by HMI's high spatial resolution observations and high duty cycle. There are two data processing pipelines (GONG and HMI) providing free access to the data and the results of the ring-diagram analysis. Here we will discuss the most recent results and improvements in the technique, as well as, the many challenges that still remain.

Rabello-Soares, M. C.

2013-12-01

187

Phase diagrams of polyelectrolyte solutions  

NASA Astrophysics Data System (ADS)

We study the phase diagram of polyelectrolyte solutions in salt and salt-free environments. We examine the phase behavior of polyelectrolyte solutions, in the semidilute regime, using different physical models, namely the Random Phase Approximation (RPA) and the cross-linked model. In the RPA, we calculate the electrostatic free energy by summing all the fluctuations of the chains and all present ionic species. Within this approximation, the phase diagrams of salt-free polyelectrolyte solutions show phase separation even without including short-range attractions or ion condensation. We find that the phase behavior of large chains resembles the phase diagram of polymer network solutions. That is, the equilibrium is established between a network phase and a chain-free phase. Upon the addition of salt, the dissociated ions increase the entropy of the system and overcome the energy from the electrostatic fluctuations. When the short-range attraction between monomers is included in the model, the free energy predicts phase segregation for all salt valences at high salt concentrations (1 mol/l and higher). The phenomenon is called salting-out and occurs simply because the addition of salt reduces the quality of the solvent and induces precipitation. However, phase segregation in the presence of multivalent ions in polyelectrolyte solutions occurs at low salt concentrations (less than 1 mol/l). We propose that this phase separation is due to polyions cross-linked by multivalent ions. We constructed a phenomenological two-state model to examine this phenomenon. The two phases coexisting in the solution are a network-like phase and a polymer-free phase. The polymer-free phase is modeled using Debye-Huckel theory. In the cross-linked phase, each condensed multivalent ion attracts an equal number of monomers creating a neutral cluster. The energy of the cluster is evaluated by a simple Coulombic energy. The bare monomer charges between the linkages are treated as line of charges. The cross-linked model solves self-consistently for the fraction of multivalent ions and counterions condensed along the polyions. The calculated phase diagram predicts the precipitation found experimentally; however, it fails to predict the redissolution transition at higher salt concentrations.

Mahdi, Khaled A.

188

Modified Block Letters  

NSDL National Science Digital Library

Objective: Properly type a modified block style business letter. In your previous assignment, you created block style business letters. The letters, whether business or personal business, had all the content lined up on the left-hand side of the page. This is what made them block style. Today you are going to learn about modified block style letters. Modified block letters ...

Simonson, Mrs.

2009-12-05

189

Baroplastic Block copolymers  

NASA Astrophysics Data System (ADS)

Block copolymers with rubbery and glassy components have been observed to have pressure induced miscibility. These microphase-separated materials, termed baroplastics, were able to flow and be processed at temperatures below the Tg of the glassy component by simple compression molding and extrusion. Diblock and triblock copolymers of polystyrene and poly(butyl acrylate) or poly(2-ethyl hexyl acrylate) were synthesized by atom transfer radical polymerization (ATRP) and processed at room temperature into well defined transparent objects. SAXS and SANS measurements demonstrated partial mixing between components as a result of pressure during processing. DSC results also show the presence of distinct domains even after several processing cycles. Their mechanical properties after processing were tested and compared with commercial thermoplastic elastomers.

Hewlett, Sheldon A.

2005-03-01

190

A Working Model of Protein Synthesis Using Lego(TM) Building Blocks.  

ERIC Educational Resources Information Center

Uses Lego building blocks to improve the effectiveness of teaching about protein synthesis. Provides diagrams and pictures for a 2-3 day student activity. Discusses mRNA, transfer RNA, and a protein synthesis model. (MVL)

Templin, Mark A.; Fetters, Marcia K.

2002-01-01

191

Failure analysis of railway brake blocks  

Microsoft Academic Search

Past efforts of the Nigerian Railway Corporation to produce shoe brake blocks locally have proved unsuccessful; the brake blocks produced are defective, and are highly susceptible to brittle (catastrophic) failure. The objective of this work was to undertake failure analysis of locally produced shoe blocks, and to design a metallurgical process to produce efficient ones. To this end, mechanical and

John Ade Ajayi; O. A. Adeleke

1997-01-01

192

A fault tree analysis strategy using binary decision diagrams  

Microsoft Academic Search

The use of binary decision diagrams (BDDs) in fault tree analysis provides both an accurate and efficient means of analysing a system. There is a problem, however, with the conversion process of the fault tree to the BDD. The variable ordering scheme chosen for the construction of the BDD has a crucial effect on its resulting size and previous research

Karen A. Reay; John D. Andrews

2002-01-01

193

Composition Inference for UML Class Diagrams Ana Milanova  

E-print Network

-to analysis, reverse engineering, ownership 1. INTRODUCTION In modern software development design recovery through reverse engineering is performed often; in a typical iterative development process reverse in a tool for the reverse engineering of UML class diagrams. Firstly, recovery of composition relationships

Bystroff, Chris

194

Graphic elicitation: using research diagrams as interview stimuli  

Microsoft Academic Search

Diagrams are effective instruments of thought and a valuable tool in conveying those thoughts to others. As such, they can be usefully employed as representations of a research domain and act as stimulus materials in interviews. This process of graphic elicitation may encourage contributions from interviewees that are difficult to obtain by other means. By representing concepts and relationships that

NATHAN CRILLY; ALAN F BLACKWELL; P JOHN CLARKSON

2006-01-01

195

Ultrasound guided supraclavicular block.  

PubMed

Ultrasound guided regional anaesthesia is becoming increasingly popular. The supraclavicular block has been transformed by ultrasound guidance into a potentially safe superficial block. We reviewed the techniques of performing supraclavicular block with special focus on ultrasound guidance. PMID:23979618

Hanumanthaiah, Deepak; Vaidiyanathan, Sabanayagam; Garstka, Maria; Szucs, Szilard; Iohom, Gabriella

2013-09-01

196

Sequential Voronoi diagram calculations using simple chemical reactions  

E-print Network

In our recent paper [de Lacy Costello et al. 2010] we described the formation of complex tessellations of the plane arising from the various reactions of metal salts with potassium ferricyanide and ferrocyanide loaded gels. In addition to producing colourful tessellations these reactions are naturally computing generalised Voronoi diagrams of the plane. The reactions reported previously were capable of the calculation of three distinct Voronoi diagrams of the plane. As diffusion coupled with a chemical reaction is responsible for the calculation then this is achieved in parallel. Thus an increase in the complexity of the data input does not utilise additional computational resource. Additional benefits of these chemical reactions is that a permanent record of the Voronoi diagram calculation (in the form of precipitate free bisectors) is achieved, so there is no requirement for further processing to extract the calculation results. Previously it was assumed that the permanence of the results was also a potenti...

Costello, Ben de Lacy; Adamatzky, Andy

2012-01-01

197

Pattern Blocks with Fractions  

NSDL National Science Digital Library

As a class we will be exploring fractions with pattern blocks. Each student will have a selection of pattern blocks. The students will manipulate their blocks to match mine as we discover patterns. pattern blocks explained Two work stations to choose from 1. pattern block work station 2. pattern work station pattern assignment pattern block assignment 2 Paper copies of assignments will be handed out. Students ...

Brown, Mrs.

2010-03-20

198

Basic primitives for molecular diagram sketching  

PubMed Central

A collection of primitive operations for molecular diagram sketching has been developed. These primitives compose a concise set of operations which can be used to construct publication-quality 2 D coordinates for molecular structures using a bare minimum of input bandwidth. The input requirements for each primitive consist of a small number of discrete choices, which means that these primitives can be used to form the basis of a user interface which does not require an accurate pointing device. This is particularly relevant to software designed for contemporary mobile platforms. The reduction of input bandwidth is accomplished by using algorithmic methods for anticipating probable geometries during the sketching process, and by intelligent use of template grafting. The algorithms and their uses are described in detail. PMID:20923555

2010-01-01

199

Hubble's diagram and cosmic expansion  

PubMed Central

Edwin Hubble's classic article on the expanding universe appeared in PNAS in 1929 [Hubble, E. P. (1929) Proc. Natl. Acad. Sci. USA 15, 168–173]. The chief result, that a galaxy's distance is proportional to its redshift, is so well known and so deeply embedded into the language of astronomy through the Hubble diagram, the Hubble constant, Hubble's Law, and the Hubble time, that the article itself is rarely referenced. Even though Hubble's distances have a large systematic error, Hubble's velocities come chiefly from Vesto Melvin Slipher, and the interpretation in terms of the de Sitter effect is out of the mainstream of modern cosmology, this article opened the way to investigation of the expanding, evolving, and accelerating universe that engages today's burgeoning field of cosmology. PMID:14695886

Kirshner, Robert P.

2004-01-01

200

Phase diagram of ammonium nitrate  

NASA Astrophysics Data System (ADS)

Ammonium Nitrate (AN) has often subjected to uses in improvised explosive devices, due to its wide availability as a fertilizer and its capability of becoming explosive with slight additions of organic and inorganic compounds. Yet, the origin of enhanced energetic properties of impure AN (or AN mixtures) is neither chemically unique nor well understood -resulting in rather catastrophic disasters in the past1 and thereby a significant burden on safety in using ammonium nitrates even today. To remedy this situation, we have carried out an extensive study to investigate the phase stability of AN at high pressure and temperature, using diamond anvil cells and micro-Raman spectroscopy. The present results confirm the recently proposed phase IV-to-IV' transition above 17 GPa2 and provide new constraints for the melting and phase diagram of AN to 40 GPa and 400 °C.

Dunuwille, M.; Yoo, C. S.

2014-05-01

201

PHASE DIAGRAMS and MACROMOLECULAR STABILITY  

E-print Network

. Shifts in second derivative UV peak position as a function of pH and temperature. 17 Figure 3. Phase diagram created using high- resolution second derivative UV spectroscopy data. 4 5 6 7 8 pH 10 20 30 40 50 T Ricin- - 2nd Derivative UV Figure 4....25 ?g/mL, circles) and aggregate (19.17 ?g/mL, triangles) species in 25 mM Tris, 300 mM NaCl, 4 mM CaCl2, pH 7 Grillo et al. Biochemistry, 40 (2), 586 -595, 2001 53 (A) Effect of temperature on rhFVIII fluorescence emission intensity at 330 nm. (B...

Middaugh, C. Russell

2006-10-26

202

Some remarks about underused Loedel diagrams  

NASA Astrophysics Data System (ADS)

We emphasize that it can be didactically very useful for students to realize how a space-time diagram of an observer, moving with a constant velocity with respect to another observer, can be obtained easily by means of a standard matrix of rotation, without recourse to imaginary axes and angles. These diagrams were introduced for the first time by Loedel and their main advantage over Minkowski diagrams is that a scale factor is not necessary to convert the units of an observer to those of another observer. We show this well-known property of Loedel diagrams using a new geometric approach.

Benedetto, E.; Capriolo, M.; Feoli, A.; Tucci, D.

2013-01-01

203

Software Tool Integrating Data Flow Diagrams and Petri Nets  

NASA Technical Reports Server (NTRS)

Data Flow Diagram - Petri Net (DFPN) is a software tool for analyzing other software to be developed. The full name of this program reflects its design, which combines the benefit of data-flow diagrams (which are typically favored by software analysts) with the power and precision of Petri-net models, without requiring specialized Petri-net training. (A Petri net is a particular type of directed graph, a description of which would exceed the scope of this article.) DFPN assists a software analyst in drawing and specifying a data-flow diagram, then translates the diagram into a Petri net, then enables graphical tracing of execution paths through the Petri net for verification, by the end user, of the properties of the software to be developed. In comparison with prior means of verifying the properties of software to be developed, DFPN makes verification by the end user more nearly certain, thereby making it easier to identify and correct misconceptions earlier in the development process, when correction is less expensive. After the verification by the end user, DFPN generates a printable system specification in the form of descriptions of processes and data.

Thronesbery, Carroll; Tavana, Madjid

2010-01-01

204

DECISION DIAGRAMS AND PASS TRANSISTOR LOGIC SYNTHESIS  

E-print Network

DECISION DIAGRAMS AND PASS TRANSISTOR LOGIC SYNTHESIS V. Bertacco S. Minato P. Verplaetse L. Benini by ARPA, under grant No. DABT63-95-C-0049. #12;Decision Diagrams and Pass Transistor Logic Synthesis V transistors and domino logic. The synthesis of these cells is based on BDD and ZBDD representations

De Micheli, Giovanni

205

THE QCD PHASE DIAGRAM AT FINITE DENSITY.  

SciTech Connect

We study the density of states method to explore the phase diagram of the chiral transition on the temperature and quark chemical potential plane. Four quark flavours are used in the analysis. Though the method is quite expensive small lattices show an indication for a triple-point connecting three different phases on the phase diagram.

SCHMIDT, C.; FODOR, Z.; KATZ, S.

2005-07-25

206

Voronoi diagrams based on convex distance functions  

Microsoft Academic Search

We present an “expanding waves” view of Voronoi diagrams that allows such diagrams to be defined for very general metrics and for distance measures that do not qualify as metrics. If a pebble is dropped into a still pond, circular waves move out from the point of impact. If n pebbles are dropped simultaneously, the places where wave fronts meet

L. Paul Chew

1985-01-01

207

Locational optimization problems solved through Voronoi diagrams  

Microsoft Academic Search

This paper reviews a class of continuous locational optimization problems (where an optimal location or an optimal configuration of facilities is found in a continuum on a plane or a network) that can be solved through the Voronoi diagram. Eight types of continuous locational optimization problems are formulated, and these problems are solved through the ordinary Voronoi diagram, the farthest-point

Atsuyuki Okabe; Atsuo Suzuki

1997-01-01

208

A sweepline algorithm for Voronoi diagrams  

Microsoft Academic Search

We present a transformation that can be used to compute Voronoi diagrams with a sweepline technique. The transformation is used to obtain simple algorithms for computing the Voronoi diagram of point sites, of line segment sites, and of weighted point sites. All algorithms have &Ogr;(n log n) worst case running time and use &Ogr;(n) space.

Steven Fortune

1986-01-01

209

Feynman Diagrams and the Quantum Stochastic Calculus  

E-print Network

We present quantum stochastic calculus in terms of diagrams taking weights in the algebra of observables of some quantum system. In particular, we note the absence of non-time-consecutive Goldstien diagrams. We review recent results in Markovian limits in these terms.

John Gough

2004-11-09

210

Visualizing hyperbolic Voronoi diagrams Frank Nielsen  

E-print Network

Visualizing hyperbolic Voronoi diagrams Frank Nielsen Sony Computer Science Laboratories, Japan simultaneously the diagram in the five standard models of hyperbolic geometry: Namely, the Poincar�e disk for personal or classroom use is granted without fee provided that copies are not made or distributed

Nielsen, Frank

211

Operations space diagram for ECRH and ECCD  

NASA Astrophysics Data System (ADS)

A Clemmov-Mullaly-Allis (CMA) type diagram, the ECW-CMA diagram, for representing the operational possibilities of electron cyclotron heating and current drive (ECRH/ECCD) systems for fusion plasmas is presented. In this diagram, with normalized density and normalized magnetic field coordinates, the parameter range in which it is possible to achieve a given task (e.g. O-mode current drive for stabilizing a neoclassical tearing mode) appears as a region. With also the Greenwald density limit shown, this diagram condenses the information on operational possibilities, facilitating the overview required at the design phase. At the operations phase it may also prove useful in setting up experimental scenarios by showing operational possibilities, avoiding the need for survey type ray-tracing at the initial planning stages. The diagram may also serve the purpose of communicating operational possibilities to non-experts. JET and ITER like plasmas are used, but the method is generic.

Bindslev, Henrik

2004-07-01

212

Reading fitness landscape diagrams through HSAB concepts  

NASA Astrophysics Data System (ADS)

Fitness landscapes are conceived as range of mountains, with local peaks and valleys. In terms of potential, such topographic variations indicate places of local instability or stability. The chemical potential, or electronegativity, its value changed of sign, carries similar information. In addition to chemical descriptors defined through hard-soft acid-base (HSAB) concepts and computed through density functional theory (DFT), the principles that rule chemical reactions allow the design of such landscape diagrams. The simplest diagram uses electrophilicity and hardness as coordinates. It allows examining the influence of maximum hardness or minimum electrophilicity principles. A third dimension is introduced within such a diagram by mapping the topography of electronegativity, polarizability or charge exchange. Introducing charge exchange during chemical reactions, or mapping a third parameter (f.i. polarizability) reinforces the information carried by a simple binary diagram. Examples of such diagrams are provided, using data from Earth Sciences, simple oxides or ligands.

Vigneresse, Jean-Louis

2014-10-01

213

Fuel “Hot” Particles of the Chernobyl Accident in the Retrospective Evaluation of the Emergency Processes at the 4th Block of the Chernobyl Nuclear Power Plant  

Microsoft Academic Search

Solid particles fallen out after the Chernobyl accident were studied by electron microscopy and X-ray diffraction analysis. The morphological and physicochemical characteristics of the dispersed fuel particles ejected into the environment and their nature were evaluated for different fallout directions, which supplements the existing version of the active accident stage at the 4th block of the Chernobyl Nuclear Power Plant

G. I. Petelin; Yu. I. Zimin; V. E. Tepikin; V. B. Rybalka; E. M. Pazukhin

2003-01-01

214

Phase diagram of ammonium nitrate  

SciTech Connect

Ammonium Nitrate (AN) is a fertilizer, yet becomes an explosive upon a small addition of chemical impurities. The origin of enhanced chemical sensitivity in impure AN (or AN mixtures) is not well understood, posing significant safety issues in using AN even today. To remedy the situation, we have carried out an extensive study to investigate the phase stability of AN and its mixtures with hexane (ANFO–AN mixed with fuel oil) and Aluminum (Ammonal) at high pressures and temperatures, using diamond anvil cells (DAC) and micro-Raman spectroscopy. The results indicate that pure AN decomposes to N{sub 2}, N{sub 2}O, and H{sub 2}O at the onset of the melt, whereas the mixtures, ANFO and Ammonal, decompose at substantially lower temperatures. The present results also confirm the recently proposed phase IV-IV{sup ?} transition above 17 GPa and provide new constraints for the melting and phase diagram of AN to 40 GPa and 400°C.

Dunuwille, Mihindra; Yoo, Choong-Shik, E-mail: csyoo@wsu.edu [Department of Chemistry and Institute for Shock Physics, Washington State University, Pullman, Washington 99164 (United States)] [Department of Chemistry and Institute for Shock Physics, Washington State University, Pullman, Washington 99164 (United States)

2013-12-07

215

Kennedy Space Center Orion Processing Team Planning for Ground Operations  

NASA Technical Reports Server (NTRS)

Topics in this presentation are: Constellation Ares I/Orion/Ground Ops Elements Orion Ground Operations Flow Orion Operations Planning Process and Toolset Overview, including: 1 Orion Concept of Operations by Phase 2 Ops Analysis Capabilities Overview 3 Operations Planning Evolution 4 Functional Flow Block Diagrams 5 Operations Timeline Development 6 Discrete Event Simulation (DES) Modeling 7 Ground Operations Planning Document Database (GOPDb) Using Operations Planning Tools for Operability Improvements includes: 1 Kaizen/Lean Events 2 Mockups 3 Human Factors Analysis

Letchworth, Gary; Schlierf, Roland

2011-01-01

216

Geochemistry, zircon U-Pb and Lu-Hf isotopes of an Early Cretaceous intrusive suite in northeastern Jiangxi Province, South China Block: Implications for petrogenesis, crust/mantle interactions and geodynamic processes  

NASA Astrophysics Data System (ADS)

The Early Cretaceous Tieshan intrusive suite, in northeastern Jiangxi Province along the northern margin of the Eastern Cathaysia Block, is composed of diabase porphyrites, monzodiorites, syenite porphyries, quartz monzonites, monzogranites and granite porphyries. LA-ICPMS zircon U-Pb isotopic analyses reveal that this intrusive complex was emplaced between 142 Ma and 117 Ma. The ~ 135 Ma diabase porphyrites, monzodiorites, and syenite porphyries are characterized by low to moderate SiO2 and MgO contents, with high K2O and total alkaline contents. These rocks exhibit slightly to strongly fractionated REE patterns and upper crust-like multi-element patterns with depletions of Nb, Ta and Ti, and show strongly negative ?Hf (t) values of - 9.0 to - 11.8. All these patterns are identical to those of the Caiyuan syenites, Huangtuling gabbros in the east, and Lengshuikeng trachyandesites and quartz syenites in the west. These geochemical and zircon Lu-Hf isotopic features indicate that their magmatic precursors were generated by 0.2%-2% partial melting of a phlogopite-bearing enriched subcontinental lithospheric mantle source that was metasomatized by sediments. The ~ 117 Ma quartz monzonite has slightly higher ?Hf (t) values (- 5.6 to - 8.7) like those of the Honggong syenites, indicating an interaction between the asthenosphere and the lithosphere. The ~ 142-134 Ma granite porphyries and monzogranites are characterized by high SiO2 levels but low concentrations of refractory elements, and show enrichment of LREEs and LILEs, with variable negative anomalies of Nb, Ta, Ti, Sr, P and Ba in multi-element diagrams normalized by primitive mantle. The monzogranite exhibits strongly negative ?Hf (t) values of - 10.5 to - 13.3 and TDM2 (Hf) values of 1849-2023 Ma, and the granite porphyries display relatively wide ?Hf (t) values of - 7.2 to - 13.4 and TDM2 (Hf) values of 1645-2043 Ma, indicating that these monzogranites and granite porphyries are highly fractionated granites derived from partial melting of the Paleoproterozoic basement with involvement of enriched mantle-derived magmas or juvenile components, and the primary magma experienced fractionation of K-feldspar, plagioclase, monazite, allanite and zircon during magma ascent and emplacement. The Tieshan intrusive suite, together with the Caiyuan syenites, Huangtuling gabbros, and Lengshuikeng trachyandesites and quartz syenites, forms a highly enriched shoshonitic rock belt in the northeastern margin of the Cathaysia Block. Integrating with previously published data, we propose that the subducted Paleo-Pacific plate extended into the central South China Block in the Middle Jurassic, and experienced slab rollback during the Early Cretaceous.

Deng, Zhengbin; Liu, Shuwen; Zhang, Lifei; Wang, Zongqi; Wang, Wei; Yang, Pengtao; Luo, Ping; Guo, Boran

2014-07-01

217

The Amplituhedron from Momentum Twistor Diagrams  

E-print Network

We propose a new diagrammatic formulation of the all-loop scattering amplitudes/Wilson loops in planar N=4 SYM, dubbed the "momentum-twistor diagrams". These are on-shell-diagrams obtained by gluing trivalent black and white vertices defined in momentum twistor space, which, in the reduced diagram case, are known to be related to diagrams in the original twistor space. The new diagrams are manifestly Yangian invariant, and they naturally represent factorization and forward-limit contributions in the all-loop BCFW recursion relations in momentum twistor space, in a fashion that is completely different from those in momentum space. We show how to construct and evaluate momentum-twistor diagrams, and how to use them to obtain tree-level amplitudes and loop-level integrands; in particular for the latter we identify an isolated bubble-structure for each loop variable, arising from a forward limit, or entangled removal of particles. From a given diagram one can directly read off the C, D matrices via a generalized "boundary measurement"; this in turn determines a cell in the amplituhedron associated with the amplitude, and our diagrammatic representations of the amplitude can provide triangulations of the amplituhedron with generally very intricate geometries. To demonstrate the computational power of the formalism, we give explicit results for general two-loop integrands, and the cells of the complete amplituhedron for two-loop MHV amplitudes.

Yuntao Bai; Song He

2014-08-11

218

Base Blocks Virtual Manipulative  

NSDL National Science Digital Library

This virtual manipulative provides base blocks that consist of individual "units," "longs," "flats," and "blocks" (ten of each set for base 10). They can be used to show place value for numbers and to increase understanding of addition and subtraction.

Manipulatives, National L.

2008-12-10

219

Living with Heart Block  

MedlinePLUS

... Share this page from the NHLBI on Twitter. Living With Heart Block First-degree heart block may ... whether you need ongoing care for your condition. Living With a Pacemaker People who have third-degree ...

220

Numerical Simulation of Nonperiodic Rail Operation Diagram Characteristics  

PubMed Central

This paper succeeded in utilizing cellular automata (CA) model to simulate the process of the train operation under the four-aspect color light system and getting the nonperiodic diagram of the mixed passenger and freight tracks. Generally speaking, the concerned models could simulate well the situation of wagon in preventing trains from colliding when parking and restarting and of the real-time changes the situation of train speeds and displacement and get hold of the current train states in their departures and arrivals. Finally the model gets the train diagram that simulates the train operation in different ratios of the van and analyzes some parameter characters in the process of train running, such as time, speed, through capacity, interval departing time, and departing numbers.

Qian, Yongsheng; Wang, Bingbing; Zeng, Junwei; Wang, Xin

2014-01-01

221

Numerical simulation of the electromagnetic field and the heat and mass transfer processes during microwave-induced pyrolysis of a wood block  

Microsoft Academic Search

A detailed two-dimensional mathematical model is proposed for the microwave-induced pyrolysis of a wood block, based on a close combination of the propagation and absorption of electromagnetic waves into the lignocellulosic material and heat\\/mass transfer with chemical reactions. Owing to characteristic times shorter by several orders of magnitude, a quasi-steady approximation is used for the electromagnetic field. In agreement with

Tommaso Ciacci; Antonio Galgano; Colomba Di Blasi

2010-01-01

222

Physics Classroom: Drawing Free-Body Diagrams  

NSDL National Science Digital Library

This tutorial explains how free body diagrams are used in solving problems involving Newton's Second Law. This tutorials demonstrates how to draw free body diagrams, what the diagram means to Physics, and includes practice problems for the student. This tutorial also includes other tutorials, animations, and student activities in other concepts of Physics. The Physics Classroom is a set of resources created for learners and teachers of high school physics. It includes comprehensive tutorials, problem sets with solutions, extra help for struggling students, Shockwave animations, multimedia learning modules, labs, and photo gallery.

Henderson, Tom

2011-10-03

223

ProofFlow: Flow Diagrams for Proofs  

E-print Network

We present a light formalism for proofs that encodes their inferential structure, along with a system that transforms these representations into flow-chart diagrams. Such diagrams should improve the comprehensibility of proofs. We discuss language syntax, diagram semantics, and our goal of building a repository of diagrammatic representations of proofs from canonical mathematical literature. The repository will be available online in the form of a wiki at proofflow.org, where the flow chart drawing software will be deployable through the wiki editor. We also consider the possibility of a semantic tagging of the assertions in a proof, to permit data mining.

Kieffer, Steven A

2012-01-01

224

Generic Quantum Block Compression  

E-print Network

A generic approach for compiling any classical block compression algorithm into a quantum block compression algorithm is presented. Using this technique, compression asymptoticaly approaching the von Neumann entropy of a qubit source can be achieved. The automatically compiled algorithms are competitive (in time and space complexity) with hand constructed quantum block compression algorithms.

John Langford

2001-09-17

225

1990 CENSUS BLOCK CENTROIDS  

EPA Science Inventory

The block_cen layer in the EPA New England database provides the centroids of block boundaries coverage based on the U.S. Bureau of the Census Public Law (PL) 94-171 data. The block_cen layer is an ARC/INFO point coverage....

226

AdBlockVideo  

NSDL National Science Digital Library

Video ads can be quite a nuisance. AdBlockVideo can help users out by effectively blocking such ads. Visitors will need to download the program and they can toggle AdBlockVideo on and off as they see fit. This application is compatible with computers running Windows 98 and newer, Max OS 10.3 and newer, and Linux.

2011-01-01

227

Building, block, street : residential block design  

E-print Network

Late twentieth-century housing, formed by economic and internally generated functional problems rather than by limitations imposed by traditional street pattern and block size, is fundamentally anti-urban. Modern American ...

Kamell, Elizabeth N. (Elizabeth Natanya)

1996-01-01

228

BLOCK SIZE FORENSIC ANALYSIS IN DIGITAL IMAGES Steven Tjoa  

E-print Network

to processing. An important first step to forensic analysis is the detection and estimation of block processing@ece.ualberta.ca. To even begin forensic analysis for digital images, we must first address the presence of block processingBLOCK SIZE FORENSIC ANALYSIS IN DIGITAL IMAGES Steven Tjoa , W. Sabrina Lin , H. Vicky Zhao , and K

Liu, K. J. Ray

229

TreeParser-Aided Klee Diagrams Display Taxonomic Clusters in DNA Barcode and Nuclear Gene Datasets  

PubMed Central

Indicator vector analysis of a nucleotide sequence alignment generates a compact heat map, called a Klee diagram, with potential insight into clustering patterns in evolution. However, so far this approach has examined only mitochondrial cytochrome c oxidase I (COI) DNA barcode sequences. To further explore, we developed TreeParser, a freely-available web-based program that sorts a sequence alignment according to a phylogenetic tree generated from the dataset. We applied TreeParser to nuclear gene and COI barcode alignments from birds and butterflies. Distinct blocks in the resulting Klee diagrams corresponded to species and higher-level taxonomic divisions in both groups, and this enabled graphic comparison of phylogenetic information in nuclear and mitochondrial genes. Our results demonstrate TreeParser-aided Klee diagrams objectively display taxonomic clusters in nucleotide sequence alignments. This approach may help establish taxonomy in poorly studied groups and investigate higher-level clustering which appears widespread but not well understood. PMID:24022383

Stoeckle, Mark Y.; Coffran, Cameron

2013-01-01

230

Blocking Delaunay triangulations  

PubMed Central

Given a set B of n black points in general position, we say that a set of white points W blocks B if in the Delaunay triangulation of B?W there is no edge connecting two black points. We give the following bounds for the size of the smallest set W blocking B: (i) 3n/2 white points are always sufficient to block a set of n black points, (ii) if B is in convex position, 5n/4 white points are always sufficient to block it, and (iii) at least n?1 white points are always necessary to block a set of n black points. PMID:23483043

Aichholzer, Oswin; Fabila-Monroy, Ruy; Hackl, Thomas; van Kreveld, Marc; Pilz, Alexander; Ramos, Pedro; Vogtenhuber, Birgit

2013-01-01

231

Architecture flow diagrams under teamwork reg sign  

SciTech Connect

The Teamwork CASE tool allows Data Flow Diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended teamwork under UNIX{trademark} to permit Hatley and Pirbhai Architecture Flow Diagrams (AFDs) to be associated with DFDs and subsequently maintained. This extension, called TWKAFD, allows a user to open an AFD, graphically edit it, and replace it into a TWKAFD maintained library. Other aspects of Hatley and Pirbhai's methodology are supported. This paper presents a quick tutorial on Architecture Diagrams. It then describes the user's view of TWKAFD, the experience incorporating it into teamwork, and the successes with using the Architecture Diagram methodology along with the shortcomings of using the teamwork/TWKAFD tool. 8 refs.

Nicinski, T.

1992-02-01

232

Free energy diagrams for protein function.  

PubMed

Simplified representations can be powerful. Two common examples are sequence logos and ribbon diagrams. Both have been extraordinarily successful in capturing complex static features of sequences and structures. Capturing function is challenging, since activation involves triggered dynamic shifts between ON and OFF states. Here, we show that simple funnel drawings can capture and usefully portray proteins by their cellular triggering mechanism. The funnel shape around the proteins' native states can describe mechanisms of upstream signal integration and downstream response. "Function diagrams" are important: they can combine diverse biochemical data to visually distinguish among activation (or recruitment) mechanisms and tag proteins in cellular networks, clarifying their mechanism at a glance. We create templates for function classification and suggest that they can extend signaling pathway maps. Of note, the diagrams describe free energy landscapes; thus, they can be quantified. We name our dynamic free-energy diagrams dFEDs. PMID:24508196

Nussinov, Ruth; Tsai, Chung-Jung

2014-03-20

233

Recognition of hand drawn chemical diagrams  

E-print Network

Chemists often use hand-drawn structural diagrams to capture and communicate ideas about organic compounds. However, the software available today for specifying these structures to a computer relies on a traditional mouse ...

Ouyang, Tom Yu

2007-01-01

234

Interfaces for creating quantitative conceptual diagrams  

E-print Network

Modern chart-making, illustration, and mathematical tools poorly support the use of conceptual components in quantitative graphs such as Economics diagrams. The substantial time those tools require to achieve the desired ...

Stewart, Robin S. (Robin Scott)

2008-01-01

235

Attribute Reduction Based on Property Pictorial Diagram  

PubMed Central

This paper mainly studies attribute reduction which keeps the lattice structure in formal contexts based on the property pictorial diagram. Firstly, the property pictorial diagram of a formal context is defined. Based on such diagram, an attribute reduction approach of concept lattice is achieved. Then, through the relation between an original formal context and its complementary context, an attribute reduct of complementary context concept lattice is obtained, which is also based on the property pictorial diagram of the original formal context. Finally, attribute reducts in property oriented concept lattice and object oriented concept lattice can be acquired by the relations of attribute reduction between these two lattices and concept lattice of complementary context. In addition, a detailed illustrative example is presented.

Wan, Qing; Wei, Ling

2014-01-01

236

Algebraic decision diagrams and their applications  

Microsoft Academic Search

In this paper we present theory and experiments on the AlgebraicDecision Diagrams (ADD's). These diagrams extend BDD'sby allowing values from an arbitrary finite domain to be associatedwith the terminal nodes. We present a treatment foundedin boolean algebras and discuss algorithms and results in applicationslike matrix multiplication and shortest path algorithms.Furthermore, we outline possible applications of ADD's to logicsynthesis, formal verification,

R. Iris Bahar; Erica A. Frohm; Charles M. Gaona; Gary D. Hachtel; Enrico Macii; Abelardo Pardo; Fabio Somenzi

1993-01-01

237

On the Construction of Abstract Voronoi Diagrams  

Microsoft Academic Search

We show that the abstract Voronoi diagram ofn sites in the plane can be constructed in timeO(n logn) by a randomized algorithm. This yields an alternative, but simpler,O(n logn) algorithm in many previously considered cases and the firstO(n logn) algorithm in some cases, e.g., disjoint convex sites with the Euclidean distance function. Abstract Voronoi diagrams are\\u000a given by a family

Kurt Mehlhorn; Stefan Meiser; Colm Ó'dúnlaing

1991-01-01

238

A Sweepline Algorithm for Voronoi Diagrams  

Microsoft Academic Search

We introduce a geometric transformation that allows Voronoi diagrams to be computed using a sweepline technique. The transformation\\u000a is used to obtain simple algorithms for computing the Voronoi diagram of point sites, of line segment sites, and of weighted\\u000a point sites. All algorithms haveO(n logn) worst-case running time and useO(n) space.

Steven Fortune

1987-01-01

239

Fluctuations and the QCD phase diagram  

SciTech Connect

In this contribution the role of quantum fluctuations for the QCD phase diagram is discussed. This concerns in particular the importance of the matter back-reaction to the gluonic sector. The impact of these fluctuations on the location of the confinement/deconfinement and the chiral transition lines as well as their interrelation are investigated. Consequences of our findings for the size of a possible quarkyonic phase and location of a critical endpoint in the phase diagram are drawn.

Schaefer, B.-J., E-mail: bernd-jochen.schaefer@uni-graz.at [Karl-Franzens-Universitaet, Institut fuer Physik (Austria)

2012-06-15

240

Preliminary Study of Impulse-Momentum Diagrams  

NSDL National Science Digital Library

In this paper we present a new representation to help students learn about momentum, impulse and conservation of momentum which we call an Impulse-Momentum Diagram. We include a description of this diagram as well as examples of how instructors can use them in the classroom. Next we present preliminary quantitative and qualitative data of a study we conducted where students used these representations. Our final analysis shows how students benefited from these representations.

Rosengrant, David; Mzoughi, Taha

2009-01-24

241

An analysis of Newton's projectile diagram  

NASA Astrophysics Data System (ADS)

Newton's famous mountain projectile diagram, reproduced in countless science books, is analysed in detail - mathematically, graphically, and historically - perhaps for the first time. A study of the relationship between this diagram from Newton's On the System of the World and the written texts on projectile motion in this book and in the Principia reveals an ambiguity in Newton's presentation. We propose an explanation of the ambiguity based on an exploration of its roots in Newton's thought.

Topper, D.; Vincent, D. E.

1999-01-01

242

Use of Frequency-Conversion Diagrams  

Microsoft Academic Search

The mathematical difficulties involved in analytical treatment of single-mesh mixer circuits with diodes and crystals lead us to consider other methods for the determination of important mixer characteristics. This paper briefly reviews the rectification-diagram method as applied to large-signal detectors, and presents for consideration the Chaffee conversion-diagram method, which treats mixer circuits in the same way as large-signal detector circuits.

H. Stockman

1944-01-01

243

Elementary diagrams in nuclear and neutron matter  

SciTech Connect

Variational calculations of nuclear and neutron matter are currently performed using a diagrammatic cluster expansion with the aid of nonlinear integral equations for evaluating expectation values. These are the Fermi hypernetted chain (FHNC) and single-operator chain (SOC) equations, which are a way of doing partial diagram summations to infinite order. A more complete summation can be made by adding elementary diagrams to the procedure. The simplest elementary diagrams appear at the four-body cluster level; there is one such E{sub 4} diagram in Bose systems, but 35 diagrams in Fermi systems, which gives a level of approximation called FHNC/4. We developed a novel technique for evaluating these diagrams, by computing and storing 6 three-point functions, S{sub xyz}(r{sub 12}, r{sub 13}, r{sub 23}), where xyz (= ccd, cce, ddd, dde, dee, or eee) denotes the exchange character at the vertices 1, 2, and 3. All 35 Fermi E{sub 4} diagrams can be constructed from these 6 functions and other two-point functions that are already calculated. The elementary diagrams are known to be important in some systems like liquid {sup 3}He. We expect them to be small in nuclear matter at normal density, but they might become significant at higher densities appropriate for neutron star calculations. This year we programmed the FHNC/4 contributions to the energy and tested them in a number of simple model cases, including liquid {sup 3}He and Bethe`s homework problem. We get reasonable, but not exact agreement with earlier published work. In nuclear and neutron matter with the Argonne v{sub 14} interaction these contributions are indeed small corrections at normal density and grow to only 5-10 MeV/nucleon at 5 times normal density.

Wiringa, R.B.

1995-08-01

244

Bifurcation diagrams for two substrate oscillatory systems  

NASA Astrophysics Data System (ADS)

The bifurcation diagrams for the Mn 2+-malonic acid-H 2SO 4-KBrO 3 an Mn 2--oxaloacetic acid-H 2SO 4-KBrO 3 systems have been studied in a stirred tank reactor. Complex oscillations associated with a period-doubling bifurcation were found. Bifurcation diagrams for the two substrate malonic-citric and malonic-oxaloacetic acid systems were also determined.

Mase?ko, Jerzy

1983-08-01

245

Phase diagram of the excitonic insulator  

Microsoft Academic Search

Motivated by recent experiments, which give strong evidence for an excitonic insulating phase in TmSe0.45Te0.55, we developed a scheme to quantitatively construct, for generic two-band models, the phase diagram of an excitonic insulator. As a first application of our approach, we calculated the phase diagram for an effective mass two-band model with long-range Coulomb interaction. The shielded potential approximation is

B. Hülsen; F. X. Bronold; H. Fehske; K. Yonemitsu

2006-01-01

246

Block LU factorization  

NASA Technical Reports Server (NTRS)

Many of the currently popular 'block algorithms' are scalar algorithms in which the operations have been grouped and reordered into matrix operations. One genuine block algorithm in practical use is block LU factorization, and this has recently been shown by Demmel and Higham to be unstable in general. It is shown here that block LU factorization is stable if A is block diagonally dominant by columns. Moreover, for a general matrix the level of instability in block LU factorization can be founded in terms of the condition number kappa(A) and the growth factor for Gaussian elimination without pivoting. A consequence is that block LU factorization is stable for a matrix A that is symmetric positive definite or point diagonally dominant by rows or columns as long as A is well-conditioned.

Demmel, James W.; Higham, Nicholas J.; Schreiber, Robert S.

1992-01-01

247

Rational synthesis of low-polydispersity block copolymer vesicles in concentrated solution via polymerization-induced self-assembly.  

PubMed

Block copolymer self-assembly is normally conducted via post-polymerization processing at high dilution. In the case of block copolymer vesicles (or "polymersomes"), this approach normally leads to relatively broad size distributions, which is problematic for many potential applications. Herein we report the rational synthesis of low-polydispersity diblock copolymer vesicles in concentrated solution via polymerization-induced self-assembly using reversible addition-fragmentation chain transfer (RAFT) polymerization of benzyl methacrylate. Our strategy utilizes a binary mixture of a relatively long and a relatively short poly(methacrylic acid) stabilizer block, which become preferentially expressed at the outer and inner poly(benzyl methacrylate) membrane surface, respectively. Dynamic light scattering was utilized to construct phase diagrams to identify suitable conditions for the synthesis of relatively small, low-polydispersity vesicles. Small-angle X-ray scattering (SAXS) was used to verify that this binary mixture approach produced vesicles with significantly narrower size distributions compared to conventional vesicles prepared using a single (short) stabilizer block. Calculations performed using self-consistent mean field theory (SCMFT) account for the preferred self-assembled structures of the block copolymer binary mixtures and are in reasonable agreement with experiment. Finally, both SAXS and SCMFT indicate a significant degree of solvent plasticization for the membrane-forming poly(benzyl methacrylate) chains. PMID:25026466

Gonzato, Carlo; Semsarilar, Mona; Jones, Elizabeth R; Li, Feng; Krooshof, Gerard J P; Wyman, Paul; Mykhaylyk, Oleksandr O; Tuinier, Remco; Armes, Steven P

2014-08-01

248

Diagrams in Architecture: An Examination of Diagram Based Design Methods in Contemporary Urban Architecture Projects.  

E-print Network

??This research explores the relationship between the use of diagrams in architectural production and an architectural outcome which redefines conventional relationships between urban built form… (more)

Shields, Fraser

2012-01-01

249

Identification of polymer stabilized blue-phase liquid crystal display by chromaticity diagram  

NASA Astrophysics Data System (ADS)

We reported an identification method of blue phase liquid crystal (BPLC) display status by using Commission International de l'Éclairage (CIE) chromaticity diagram. The BPLC was injected into in-plane-switch (IPS) cell, polymer stabilized (PS) by ultraviolet cured process and analyzed by luminance colorimeter. The results of CIE chromaticity diagram showed a remarkable turning point when polymer stabilized blue phase liquid crystal II (PSBPLC-II) formed in the IPS cell. A mechanism of CIE chromaticity diagram identify PSBPLC display status was proposed, and we believe this finding will be useful to application and production of PSBPLC display.

Lan, Yi-Fen; Tsai, Cheng-Yeh; Wang, Ling-Yung; Ku, Po-Jen; Huang, Tai-Hsiang; Liu, Chu-Yu; Sugiura, Norio

2012-04-01

250

The Epsilon Expansion of Feynman Diagrams via Hypergeometric Functions and Differential Reduction  

E-print Network

Higher-order diagrams required for radiative corrections to mixed electroweak and QCD processes at the LHC and anticipated future colliders will require numerically stable representations of the associated Feynman diagrams. The hypergeometric representation supplies an analytic framework that is useful for deriving such stable representations. We discuss the reduction of Feynman diagrams to master integrals, and compare integration-by-parts methods to differential reduction of hypergeometric functions. We describe the problem of constructing higher-order terms in the epsilon expansion, and characterize the functions generated in such expansions.

S. A. Yost; V. V. Bytev; M. Yu. Kalmykov; B. A. Kniehl; B. F. L. Ward

2011-10-02

251

Blocking Losses on an Optical Communications Link  

NASA Technical Reports Server (NTRS)

Many photon-counting photo-detectors have the property that they become inoperative for some time after detection event. We say the detector is blocked during this time.Blocking produces losses when using the detector as a photon-counter to detect a communications signal. In this paper, we characterize blocking losses for single detectors and for arrays of detectors. For arrays, we discuss conditions under which the output may be approximated as a Poisson point process, and provide a simple approximation to the blocking loss. We show how to extend the analysis to arrays of non-uniformly illuminated arrays.

Moision, Bruce; Piazzolla, Sabino

2011-01-01

252

Formation of Anisotropic Block Copolymer Gels  

NASA Astrophysics Data System (ADS)

Anisotropic, fibrillar gels are important in a variety of processes. Biomineralization is one example, where the mineralization process often occurs within a matrix of collagen or chitin fibers that trap the mineral precursors and direct the mineralization process. We wish to replicate this type of behavior within block copolymer gels. Particularly, we are interested in employing gels composed of cylindrical micelles, which are anisotropic and closely mimic biological fibers. Micelle geometry is controlled in our system by manipulating the ratio of molecular weights of the two blocks and by controlling the detailed thermal processing history of the copolymer solutions. Small-Angle X-ray Scattering and Dynamic Light Scattering are used to determine the temperature dependence of the gel formation process. Initial experiments are based on a thermally-reversible alcohol-soluble system, that can be subsequently converted to a water soluble system by hydrolysis of a poly(t-butyl methacrylate) block to a poly (methacrylic acid) block.

Liaw, Chya Yan; Shull, Kenneth; Henderson, Kevin; Joester, Derk

2011-03-01

253

Mediation by NF-?B of cytokine induced expression of intercellular adhesion molecule 1 (ICAM-1) in an intestinal epithelial cell line, a process blocked by proteasome inhibitors  

PubMed Central

Background/aims—The gene promoter for the intercellular adhesion molecule ICAM-1 possesses binding sites for several transcriptional factors, including nuclear factor ?B (NF-?B). The role of NF-?B in ICAM-1 gene regulation was therefore examined by using different proteasome inhibitors in tumour necrosis factor ? (TNF-?) stimulated IEC-6 rat intestinal epithelial cells. ?Methods—ICAM-1 expression was analysed by enzyme linked immunosorbent assay (ELISA), reverse transcriptase polymerase chain reaction, and immunohistochemistry. Steady state levels of cytoplasmic I?B protein were evaluated by western blot, and nuclear translocation of NF-?B was determined by electrophoretic mobility shift assay and immunofluorescence staining. Cell adhesion was assayed by measuring the binding of fluorescence labelled MOLT-4 cells. ?Results—TNF-? induced ICAM-1 mRNA and protein expression in IEC-6 cells, which was followed by increased adhesion of MOLT-4 lymphocytes. Blocking TNF-? induced I?B? degradation with proteasome inhibitors reduced TNF-? induced NF-?B activation and ICAM-1 gene induction and notably decreased MOLT-4 cell adhesion without affecting Jun N-terminal kinase (JNK/SAPK) activity or de novo protein synthesis. ?Conclusion—TNF-? induction of ICAM-1 expression is mediated by the transcription factor NF-?B and can be inhibited by blocking I?B? degradation. Thus the I?B/NF-?B system is a promising target for pharmacological modulation of the expression of adhesion molecules and other inflammatory genes in the intestine. ?? Keywords: adhesion molecules; ICAM-1; cytokines; tumour necrosis factor ?; intestinal inflammation; NF-?B. PMID:9691914

Jobin, C; Hellerbrand, C; Licato, L; Brenner, D; Sartor, R

1998-01-01

254

Pentagon diagrams of Bhabha scattering  

E-print Network

We report on tensor reduction of five point integrals needed for the evaluation of loop-by-loop corrections to Bhabha scattering. As an example we demonstrate the calculation of the rank two tensor integral with cancellation of the spurious Gram determinant in the denominator. The reduction scheme is worked out for arbitrary five point processes.

J. Fleischer; J. Gluza; K. Kajda; T. Riemann

2007-10-26

255

On phase diagrams of magnetic reconnection  

NASA Astrophysics Data System (ADS)

Recently, "phase diagrams" of magnetic reconnection were developed to graphically organize the present knowledge of what type, or phase, of reconnection is dominant in systems with given characteristic plasma parameters. Here, a number of considerations that require caution in using the diagrams are pointed out. First, two known properties of reconnection are omitted from the diagrams: the history dependence of reconnection and the absence of reconnection for small Lundquist number. Second, the phase diagrams mask a number of features. For one, the predicted transition to Hall reconnection should be thought of as an upper bound on the Lundquist number, and it may happen for considerably smaller values. Second, reconnection is never "slow," it is always "fast" in the sense that the normalized reconnection rate is always at least 0.01. This has important implications for reconnection onset models. Finally, the definition of the relevant Lundquist number is nuanced and may differ greatly from the value based on characteristic scales. These considerations are important for applications of the phase diagrams. This is demonstrated by example for solar flares, where it is argued that it is unlikely that collisional reconnection can occur in the corona.

Cassak, P. A.; Drake, J. F.

2013-06-01

256

ASSESSING DIAGRAM QUALITY: MAKING A DIFFERENCE TO REPRESENTATION  

Microsoft Academic Search

The effectiveness of a diagram in problem solving is dependent on its utility as a cognitive tool. In order to develop students' ability to use diagrams as cognitive tools, teachers need to assess the quality of students' diagrams and provide them with the necessary support. However assessing the quality of diagrams is problematic. This paper discusses how theoretical prototypes and

Carmel M Diezmann

257

The Hardness-Duration Diagram of Gamma-Ray Bursts  

Microsoft Academic Search

The hardness-duration diagram for gamma-ray bursts still contains undiscovered important information about the intrinsic properties of these phenomena. We analyze these diagrams for the PHEBUS and BATSE experiments. First, we show that the BATSE diagram is very similar to that for PHEBUS when we restrict the BATSE data set to events observable by PHEBUS. In this case, both diagrams present

J. P. Dezalay; J. P. Lestrade; C. Barat; R. Talon; R. Sunyaev; O. Terekhov; A. Kuznetsov

1996-01-01

258

Fishbone Diagrams: Organize Reading Content with a "Bare Bones" Strategy  

ERIC Educational Resources Information Center

Fishbone diagrams, also known as Ishikawa diagrams or cause-and-effect diagrams, are one of the many problem-solving tools created by Dr. Kaoru Ishikawa, a University of Tokyo professor. Part of the brilliance of Ishikawa's idea resides in the simplicity and practicality of the diagram's basic model--a fish's skeleton. This article describes how…

Clary, Renee; Wandersee, James

2010-01-01

259

The Use of Computational Diagrams and Nomograms in Higher Education.  

ERIC Educational Resources Information Center

The use of computational diagrams and nomographs for the calculations that frequently occur in college administration is examined. Steps in constructing a nomograph and a four-dimensional computational diagram are detailed, and uses of three- and four-dimensional diagrams are covered. Diagrams and nomographs are useful in the following cases: (1)…

Brandenburg, Richard K.; Simpson, William A.

1984-01-01

260

Use of Affinity Diagrams as Instructional Tools in Inclusive Classrooms.  

ERIC Educational Resources Information Center

This article describes how the affinity diagram, a tool for gathering information and organizing it into natural groupings, can be used in inclusive classrooms. It discusses how students can be taught to use an affinity diagram, how affinity diagrams can be used to reflect many voices, and how affinity diagrams can be used to plan class projects.…

Haselden, Polly G.

2003-01-01

261

Picturing Probability: the poverty of Venn diagrams, the richness of  

E-print Network

's name deserves to be attached to these diagrams. Venn diagrams visually ground symbolic logic book Symbolic Logic Venn makes much use of these diagrams, yet in his book on probability, The Logic 1 It is true that Venn's probability book predates his symbolic logic book, however the diagrams

Oldford, R.W.

262

Satellite Feature Identification: Blocking Patterns  

NSDL National Science Digital Library

Satellite Feature Identification: Blocking Patterns examines how water vapor imagery can be used to help diagnose blocking patterns and their dissipation. Four major blocking patterns are covered in this module: Blocking highs, Cut-off lows, Rex blocks and Omega blocks. This module is part of the series: "Dynamic Feature Identification: The Satellite Palette".

Comet

2009-06-26

263

Thermally actuated wedge block  

DOEpatents

This invention relates to an automatically-operating wedge block for maintaining intimate structural contact over wide temperature ranges, including cryogenic use. The wedging action depends on the relative thermal expansion of two materials having very different coefficients of thermal expansion. The wedge block expands in thickness when cooled to cryogenic temperatures and contracts in thickness when returned to room temperature.

Queen, Jr., Charles C. (Knoxville, TN)

1980-01-01

264

Commercial applications of block copolymer photonic gels  

E-print Network

Block copolymer photonic gels are a simple and easily processed material which responds rapidly to environmental stimuli through a color change. The diblock copolymer that forms the gel self-assembles into a lamellar ...

Lou, Sally S

2008-01-01

265

A Geometric Diagram of Separable States  

E-print Network

This paper present a geometric diagram of a separable state: If a mixed state $\\sigma $ is separable, there are $2^{nS(\\sigma)}$ linearly independant product vectors which span the same Hilbert space as the $2^{nS(\\sigma)}$ ``likely'' strings of $\\sigma ^{\\otimes n}$ do. This diagram results in a criterion for separability which is strictly stronger than the inorder criterion in [M.A. Nielsen and J. Kempe, Phys. Rev. Lett. 86, 5184 (2001)]. This means that the number of product bases of states of a system has close link to the nonlocality of the system.

Ping Xing Chen; Cheng Zu Li

2004-03-02

266

Sampling versus Blocking  

E-print Network

The idea of blocking in configuration space has played an important role in the development of the RG ideas. However, despite being half a century old and having had a huge intellectual impact, generic numerical methods to perform blocking for lattice models have progressed more slowly than sampling methods. Blocking may be essential to deal with near conformal situations. Typically, blocking methods have smaller statistical errors but larger systematic errors than sampling methods. This situation is evolving with recent developments based on the Tensor RG (TRG) method. We report recent results for spin and gauge lattice models obtained with this new method regarding searches for fixed points, calculations of critical exponents and resolutions of sign problems. An interesting model for comparison is the 2-dimensional O(2) model with a chemical potential which has a sign problem with conventional Monte Carlo but allows sampling with the worm algorithm and blocking with various TRG formulations. We compare the ...

Meurice, Yannick; Unmuth-Yockey, Judah; Yang, Li-Ping; Zou, Haiyuan

2014-01-01

267

Rapid prototyping system for teaching real-time digital signal processing  

Microsoft Academic Search

A low-cost rapid-prototyping system using Texas Instruments' (TI) TMS320C30 Evaluation Module (EVM) based on the MathWorks development software is presented in this paper. The rapid prototyping system serves as an educational tool in learning digital signal processing (DSP) and seeing the concept realized in real time. The development software modules, Simulink, uses graphical block diagrams to create models for real-time

Woon-Seng Gan; Yong-Kim Chong; W. Gong; Wei-Tong Tan

2000-01-01

268

Analyses of requirements for computer control and data processing experiment subsystems: Image data processing system (IDAPS) software description (7094 version), volume 2  

NASA Technical Reports Server (NTRS)

A description of each of the software modules of the Image Data Processing System (IDAPS) is presented. The changes in the software modules are the result of additions to the application software of the system and an upgrade of the IBM 7094 Mod(1) computer to a 1301 disk storage configuration. Necessary information about IDAPS sofware is supplied to the computer programmer who desires to make changes in the software system or who desires to use portions of the software outside of the IDAPS system. Each software module is documented with: module name, purpose, usage, common block(s) description, method (algorithm of subroutine) flow diagram (if needed), subroutines called, and storage requirements.

1973-01-01

269

A block copolymer approach to the pre-programmed organization of inorganic nanostructures  

NASA Astrophysics Data System (ADS)

Organized arrays of inorganic nanoparticles show electronic, optical, and magnetic properties that originate from the coupling of size- and shape-dependent properties of individual nanoparticles (NPs). Controllable and predictable organization of NPs in complex, hierarchical structures provides a route to the fabrication of new materials and functional devices. Significant progress has been achieved in the bottom-top organization of NPs arrays, which is based on their self-assembly, yet, currently, this approach remains largely empirical. We propose a block copolymer paradigm for the self-assembly of asymmetric inorganic nanorods. By using a striking analogy between amphiphilic ABA triblock copolymers and inorganic nanorods carrying distinct ligands at the edges and ling sides, we assembled the nanorods in structures with varying geometries. The self-assembly was tunable and reversible, and it was achieved solely by changing the solvent quality for the constituent ``blocks''. We mapped the self-assembly process by using phase-like diagrams and demonstrated control over the optical properties of the self-assembled structures. The proposed strategy provides a new route to the organization of nanoparticles by using the strategies that are established for the self-assembly of block copolymers.

Kumacheva, Eugenia

2010-03-01

270

Phase Diagram in Stored-Energy-Driven Lévy Flight  

NASA Astrophysics Data System (ADS)

Phase diagram based on the mean square displacement (MSD) and the distribution of diffusion coefficients of the time-averaged MSD for the stored-energy-driven L\\'evy flight (SEDLF) is presented. In the SEDLF, a random walker cannot move while storing energy, and it jumps by the stored energy. The SEDLF shows a whole spectrum of anomalous diffusions including subdiffusion and superdiffusion, depending on the coupling parameter between storing time (trapping time) and stored energy. This stochastic process can be investigated analytically with the aid of renewal theory. Here, we consider two different renewal processes, i.e., ordinary renewal process and equilibrium renewal process, when the mean trapping time does not diverge. We analytically show the phase diagram according to the coupling parameter and the power exponent in the trapping-time distribution. In particular, we find that distributional behavior of time-averaged MSD intrinsically appears in superdiffusive as well as normal diffusive regime even when the mean trapping time does not diverge.

Akimoto, Takuma; Miyaguchi, Tomoshige

2014-11-01

271

Segmenting Dot Patterns by Voronoi Diagram Concavity  

Microsoft Academic Search

This correspondence defines a signed distance, called ``internal concavity,'' on paths of the Voronoi diagram of a dot pattern. An algorithm using internal concavity to segment dot patterns is described. The segmentation algorithm produces subsets of the Dirichlet tessellation (Delaunay triangulation) of the dot pattern.

John Fairfield

1983-01-01

272

Neural network design using Voronoi diagrams  

Microsoft Academic Search

A novel approach is proposed which determines the number of layers, the number of neurons in each layer, and their connection weights for a particular implementation of a neural network, with the multilayer feedforward topology, designed to classify patterns in the multidimensional feature space. The approach is based on construction of a Voronoi diagram over the set of points representing

N. K. Bose; Amulya K. Garga

1993-01-01

273

Evaluating formal properties of feature diagram languages  

Microsoft Academic Search

Feature diagrams (FDs) are a family of popular modelling languages, mainly used for managing variability in software product lines. FDs were first introduced by Kang et al. as part of the feature-oriented domain analysis (FODA) method back in 1990. Since then, various extensions of FODA FDs were devised to compensate for purported ambiguity and lack of precision and expressiveness. Recently,

Patrick Heymans; Pierre-yves Schobbens; Jean-christophe Trigaux; Yves Bontemps; Raimundas Matulevicius; Andreas Classen

2008-01-01

274

Nonverbal Poetry: Family Life-Space Diagrams.  

ERIC Educational Resources Information Center

Examines life-space diagrams as a form of nonverbal poetry which taps personal feelings, tells a story, and characterizes a particular life situation, forming a useful therapy technique that provides a family the opportunity to examine its internal family relationships. Offers two case studies, discusses five levels of knowing and awareness, and…

Bardill, Donald R.

2001-01-01

275

Bregman Voronoi Diagrams: Properties, Algorithms and Applications  

E-print Network

entropy of distributions. We define several types of Bregman diagrams, establish correspondences between and Object Modeling -- Geometric algorithms, languages, and systems; F.2.2 [Anal- ysis of Algorithms on Discrete Algorithms (SODA), pp. 746-755, 2007. Related materials are available online at http://www.csl.sony

Nielsen, Frank

276

Ferromagnetic phase diagram of neutron matter  

E-print Network

The magnetic properties of matter under extreme conditions are of particular importance to understanding the neutron star interior. One contributing factor to the magnetic field of a neutron star could be the ferromagnetic phase of nuclear matter. In this letter we present a self-consistent, relativistic description of ferromagnetism in dense matter, within which the ferromagnetic phase diagram for neutron matter is calculated.

J. P. W. Diener; F. G. Scholtz

2010-06-29

277

NFHS Court and Field Diagram Guide.  

ERIC Educational Resources Information Center

This guide contains a comprehensive collection of diagrams and specifications of playing fields and courts used in interscholastic and recreational sports, along with information on how to set up various formats of tournament drawings, how to compute golf handicaps, and how to convert metric-to-English distances. Lists are provided of national…

Gillis, John, Ed.

278

Shockwave Physics Studios: Free Body Diagrams  

NSDL National Science Digital Library

This interactive activity, part of The Physics Classroom tutorial collection, provides self-directed practice in constructing free-body diagrams. Twelve descriptions of physical situations are presented; the goal is to determine the type and relative magnitude of the forces acting upon the described object. Additional help is provided with one click on "Web Help".

Henderson, Tom

2011-09-27

279

Revised state diagram of Laponite dispersions  

Microsoft Academic Search

We propose a state diagram of charged disk-like mineral particle (Laponite) dispersions as a function of the Laponite concentration (C) and the concentration of added salt (Cs), based on simple observation and light-scattering measurements. At low C or high Cs the dispersions separate into two domains due to sedimentation of Laponite aggregates, while at high C and low Cs they

Philippe Mongondry; Jean François Tassin; Taco Nicolai

2005-01-01

280

Shared Variables Interaction Diagrams Rajeev Alur  

E-print Network

of an SVID, an action corresponds to, possibly multiple, reading/writing of shared variables. The actions that the problem can be solved in linear-time when all the variables are read-shared but write- exclusive. BenefitsShared Variables Interaction Diagrams Rajeev Alur Department of Computer and Information Science

Grosu, Radu

281

The Keynesian Diagram: A Cross to Bear?  

ERIC Educational Resources Information Center

In elementary economics courses students are often introduced to the basic concepts of macroeconomics through very simplified static models, and the concept of a macroeconomic equilibrium is generally explained with the help of an aggregate demand/aggregate supply (AD/AS) model and an income/expenditure model (via the Keynesian cross diagram).…

Fleck, Juergen

282

One Parameter Bifurcation Diagram for Chua's Circuit  

E-print Network

One Parameter Bifurcation Diagram for Chua's Circuit MIREILLE E. BROUCKE Abstract -The objective of this letter is to report on the usefulness of a l-dimensional map for characterizing the dynamics of a third-order piece- wise-linear circuit. The map is used to reproduce period-doubling birfurca- tions

Broucke, Mireille E.

283

Testing for monotonicity in the Hubble diagram  

E-print Network

General relativistic kinematics and the cosmological principle alone imply a monotonicity constraint in the Hubble diagram, which we confront to present-day supernova data. We use the running gradient method of statistical inference by Hall & Heckman (2000). We find no significant departure from monotonicity. The method seems well adapted and we recommend its use with future data.

Nicolai Meinshausen; John Rice; Thomas Schücker

2006-12-19

284

Dynamic Tactile Diagram Simplification on Refreshable Displays  

ERIC Educational Resources Information Center

The increasing use of visual diagrams in educational and work environments, and even our daily lives, has created obstacles for individuals who are blind or visually impaired to "independently" access the information they represent. Although physical tactile pictures can be created to convey the visual information, it is typically a slow,…

Rastogi, Ravi; Pawluk, Dianne T. V.

2013-01-01

285

Recognition of Hand Drawn Chemical Diagrams  

Microsoft Academic Search

Chemists often use hand-drawn structural diagrams to capture and communicate ideas about organic com- pounds. However, the software available today for spec- ifying these structures to a computer relies on a tra- ditional mouse and keyboard interface, and as a re- sult lacks the ease of use, naturalness, and speed of drawing on paper. In response, we have developed a

Tom Y. Ouyang; Randall Davis

2007-01-01

286

Constructing Causal Diagrams to Learn Deliberation  

ERIC Educational Resources Information Center

Policy problems like "What should we do about global warming?" are ill-defined in large part because we do not agree on a system to represent them the way we agree Algebra problems should be represented by equations. As a first step toward building a policy deliberation tutor, we investigated: (a) whether causal diagrams help students learn to…

Easterday, Matthew W.; Aleven, Vincent; Scheines, Richard; Carver, Sharon M.

2009-01-01

287

Extended Activity Diagrams for Adaptive Workflow Modelling  

Microsoft Academic Search

Activity diagrams are a recognized form of modelling real time systems and have been included in the list of UML techniques for modelling the dynamic aspects of object oriented systems. In this paper, we explain how workflow techniques can be used for developing models of larger chunks of systems. These chunks are expressed through the use of worklets. This can

Elizabeth Chang; E. Gautama; Tharam S. Dillon

2001-01-01

288

Towards Flexible Graphical Communication Using Adaptive Diagrams  

E-print Network

, life- less objects reflecting their origin in print media, the computer of the near future will provide their origin in print media, the computer of the near future will provide more flexible visual computer. There are five main differences between the old print media based view of diagrams and this new view based

Marriott, Kimbal

289

Fog Machines, Vapors, and Phase Diagrams  

ERIC Educational Resources Information Center

A series of demonstrations is described that elucidate the operation of commercial fog machines by using common laboratory equipment and supplies. The formation of fogs, or "mixing clouds", is discussed in terms of the phase diagram for water and other chemical principles. The demonstrations can be adapted for presentation suitable for elementary…

Vitz, Ed

2008-01-01

290

The Research Building Blocks  

E-print Network

Kindergarten Through Grade 3 Third Edition #12;#12;The Research Building Blocks for Teaching Children to Read Corporation Kindergarten Through Grade 3 #12;#12;Contents i Introduction 1 Phonemic Awareness Instruction 11

Rau, Don C.

291

Cell block eleven (left) and cell block fifteen, looking from ...  

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

Cell block eleven (left) and cell block fifteen, looking from cell block two into the "Death Row" exercise yard - Eastern State Penitentiary, 2125 Fairmount Avenue, Philadelphia, Philadelphia County, PA

292

31 CFR 595.301 - Blocked account; blocked property.  

... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY TERRORISM SANCTIONS REGULATIONS General Definitions § 595.301 Blocked account; blocked property. The terms blocked...

2014-07-01

293

31 CFR 551.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2011 CFR

... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY SOMALIA SANCTIONS REGULATIONS General Definitions § 551.301 Blocked account; blocked property. The terms blocked...

2011-07-01

294

31 CFR 551.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2010 CFR

... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY SOMALIA SANCTIONS REGULATIONS General Definitions § 551.301 Blocked account; blocked property. The terms blocked...

2010-07-01

295

31 CFR 551.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2012 CFR

... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY SOMALIA SANCTIONS REGULATIONS General Definitions § 551.301 Blocked account; blocked property. The terms blocked...

2012-07-01

296

31 CFR 551.301 - Blocked account; blocked property.  

... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY SOMALIA SANCTIONS REGULATIONS General Definitions § 551.301 Blocked account; blocked property. The terms blocked...

2014-07-01

297

31 CFR 551.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2013 CFR

... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY SOMALIA SANCTIONS REGULATIONS General Definitions § 551.301 Blocked account; blocked property. The terms blocked...

2013-07-01

298

31 CFR 562.301 - Blocked account; blocked property.  

...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRANIAN HUMAN RIGHTS ABUSES SANCTIONS REGULATIONS General Definitions § 562.301 Blocked account; blocked property. The terms blocked...

2014-07-01

299

View of cell block eight (left), cell block seven, and ...  

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

View of cell block eight (left), cell block seven, and southwest guard tower, looking from cell block eight roof - Eastern State Penitentiary, 2125 Fairmount Avenue, Philadelphia, Philadelphia County, PA

300

A binary-decision-diagram-based two-bit arithmetic logic unit on a GaAs-based regular nanowire network with hexagonal topology  

NASA Astrophysics Data System (ADS)

A two-bit arithmetic logic unit (ALU) was successfully fabricated on a GaAs-based regular nanowire network with hexagonal topology. This fundamental building block of central processing units can be implemented on a regular nanowire network structure with simple circuit architecture based on graphical representation of logic functions using a binary decision diagram and topology control of the graph. The four-instruction ALU was designed by integrating subgraphs representing each instruction, and the circuitry was implemented by transferring the logical graph structure to a GaAs-based nanowire network formed by electron beam lithography and wet chemical etching. A path switching function was implemented in nodes by Schottky wrap gate control of nanowires. The fabricated circuit integrating 32 node devices exhibits the correct output waveforms at room temperature allowing for threshold voltage variation.

Zhao, Hong-Quan; Kasai, Seiya; Shiratori, Yuta; Hashizume, Tamotsu

2009-06-01

301

The Atom - The Final Link in the Division Process or the First Building Block? Pre-Instructional Conceptions about the Structure of Substances.  

ERIC Educational Resources Information Center

The hypothesis as to the atomic structure of any given substance is introduced in many physics and chemistry textbooks by conveying the idea of repetitive division of a given amount of substance, for example, by grinding, dissolving, or evaporating. The rationale for this approach is the assumption of students inferring that this process of…

Pfundt, Helga

302

1736 IEEE TRANSACTIONS ON ACOUSTICS,SPEECH, ANDSIGNAL PROCESSING, VOL. ASSP-35,NO. 12, DECEMBER 1987 Two-Dimensional Block Kalman Filtering for Image  

E-print Network

1736 IEEE TRANSACTIONS ON ACOUSTICS,SPEECH, ANDSIGNAL PROCESSING, VOL. ASSP-35,NO. 12, DECEMBER is introduced. This structure is derived by arranging a vector autoregressive (AR) model with a causal quarter image which may be due to sensors, quan- tization effects, and transmission media,etc.The noise which

Azimi-Sadjadi, Mahmood R.

303

Figure 1. (a) Basic structure of the proposed system (b) Proposed architectural block diagram  

E-print Network

. The wireless system is more convenient than wire-line system in the case of passing data through multi-layered clothes. This is why the wireless system is commonly used for body sensor networks [2]. However, the wireless system consumes much more power than wire-line system. This is a huge problem since the battery

Yoo, Hoi-Jun

304

Generalized Voronoi Diagrams for a Ladder: II. Efficient Construction of the Diagram  

Microsoft Academic Search

We present a collection of algorithms, all running in timeO(n\\u000a 2 logn ? (n)\\u000a o(?(n)3)) for some fixed integers(where ?(n) is the inverse Ackermann's function), for constructing a skeleton representation of a suitably generalized “Voronoi diagram”\\u000a for a ladder moving in a two-dimensional space bounded by polygonal barriers consisting ofn line segments. This diagram, which is a two-dimensional subcomplex of

Colm Ó'dúnlaing; Micha Sharir; Chee-keng Yap

1987-01-01

305

Development of a phase diagram to control composite manufacturing using Raman spectroscopy  

NASA Astrophysics Data System (ADS)

Fiber reinforced epoxy resins manufactured in autoclaves are expected to continue to dominate the composites market through 2010. However, the ability to obtain consistent mechanical properties from product-to-product remains difficult. This is largely due to the inability to monitor and control epoxy cure, loosely defined as the process of chain extension and cross-linking. Current autoclave process control employs a heat schedule based on a time-temperature-transformation (TTT) phase diagram that is determined by dynamic mechanical rheology. The phase diagram defines epoxy cure in terms of gelation and vitrification. We have been using an FT-Raman spectrometer to develop correlations between molecular (chain extension and cross-linking) and macroscopic (gelation and vitrification) data. The basis of a TTT phase diagram using Raman kinetic data for process control will be presented for several reactions.

Farquharson, Stuart; Carignan, Jessica; Khitrov, Victor; Senador, Antonio; Shaw, Montgomery

2004-03-01

306

A non-fullerene electron acceptor based on fluorene and diketopyrrolopyrrole building blocks for solution-processable organic solar cells with an impressive open-circuit voltage.  

PubMed

A novel solution-processable non-fullerene electron acceptor 6,6'-(5,5'-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(thiophene-5,2-diyl))bis(2,5-bis(2-ethylhexyl)-3-(thiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione) (DPP1) based on fluorene and diketopyrrolopyrrole conjugated moieties was designed, synthesized and fully characterized. DPP1 exhibited excellent solubility and high thermal stability which are essential for easy processing. Upon using DPP1 as an acceptor with the classical electron donor poly(3-hexylthiophene), solution processable bulk-heterojunction solar cells afforded a power conversion efficiency of 1.2% with a high open-circuit voltage (1.1 V). As per our knowledge, this value of open circuit voltage is one of the highest values reported so far for a bulk-heterojunction device using DPP1 as a non-fullerene acceptor. PMID:25274538

Patil, Hemlata; Zu, Wang Xi; Gupta, Akhil; Chellappan, Vijila; Bilic, Ante; Sonar, Prashant; Rananaware, Anushri; Bhosale, Sidhanath V; Bhosale, Sheshanath V

2014-11-21

307

Data Flow Diagramming Skills Acquisition: Impact of Cooperative versus Individual Learning  

ERIC Educational Resources Information Center

Information systems (IS) process modeling using the technique of Data Flow Diagramming (viz., Systems Analysis) can be defined as a complex task for IS designers. This study draws from the domains of educational psychology and organizational behavior in examining the training of novices in conceptual process modeling. Specifically, an experiment…

Powell, Anne; Bordoloi, Bijoy; Ryan, Sherry D.

2007-01-01

308

Precursors to atmospheric blocking events  

E-print Network

Atmospheric blocking events disturb synoptic-scale features from their normal eastward progression, causing anomalous weather conditions for the duration of the blocking event. The essence of blocking can be captured by ...

Marino, Garrett P

2009-01-01

309

Extrinsic germanium Blocked Impurity Bank (BIB) detectors  

NASA Technical Reports Server (NTRS)

Ge:Ga blocked-impurity-band (BIB) detectors with long wavelength thresholds greater than 190 microns and peak quantum efficiencies of 4 percent, at an operating temperature of 1.8 K, have been fabricated. These proof of concept devices consist of a high purity germanium blocking layer epitaxially grown on a Ga-doped Ge substrate. This demonstration of BIB behavior in germanium enables the development of far infrared detector arrays similar to the current silicon-based devices. Present efforts are focussed on improving the chemical vapor deposition process used to create the blocking layer and on the lithographic processing required to produce monolithic detector arrays in germanium. Approaches to test the impurity levels in both the blocking and active layers are considered.

Krabach, Timothy N.; Huffman, James E.; Watson, Dan M.

1989-01-01

310

Variation block-based genomics method for crop plants  

PubMed Central

Background In contrast with wild species, cultivated crop genomes consist of reshuffled recombination blocks, which occurred by crossing and selection processes. Accordingly, recombination block-based genomics analysis can be an effective approach for the screening of target loci for agricultural traits. Results We propose the variation block method, which is a three-step process for recombination block detection and comparison. The first step is to detect variations by comparing the short-read DNA sequences of the cultivar to the reference genome of the target crop. Next, sequence blocks with variation patterns are examined and defined. The boundaries between the variation-containing sequence blocks are regarded as recombination sites. All the assumed recombination sites in the cultivar set are used to split the genomes, and the resulting sequence regions are termed variation blocks. Finally, the genomes are compared using the variation blocks. The variation block method identified recurring recombination blocks accurately and successfully represented block-level diversities in the publicly available genomes of 31 soybean and 23 rice accessions. The practicality of this approach was demonstrated by the identification of a putative locus determining soybean hilum color. Conclusions We suggest that the variation block method is an efficient genomics method for the recombination block-level comparison of crop genomes. We expect that this method will facilitate the development of crop genomics by bringing genomics technologies to the field of crop breeding. PMID:24929792

2014-01-01

311

The geometry of on-shell diagrams  

NASA Astrophysics Data System (ADS)

The fundamental role of on-shell diagrams in quantum field theory has been recently recognized. On-shell diagrams, or equivalently bipartite graphs, provide a natural bridge connecting gauge theory to powerful mathematical structures such as the Grassmannian. We perform a detailed investigation of the combinatorial and geometric objects associated to these graphs. We mainly focus on their relation to polytopes and toric geometry, the Grassmannian and its stratification. Our work extends the current understanding of these connections along several important fronts, most notably eliminating restrictions imposed by planarity, positivity, reducibility and edge removability. We illustrate our ideas with several explicit examples and introduce concrete methods that considerably simplify computations. We consider it highly likely that the structures unveiled in this article will arise in the on-shell study of scattering amplitudes beyond the planar limit. Our results can be conversely regarded as an expansion in the understanding of the Grassmannian in terms of bipartite graphs.

Franco, Sebastián; Galloni, Daniele; Mariotti, Alberto

2014-08-01

312

More on phase diagram of Laponite  

E-print Network

The phase diagram of a charged colloidal system (Laponite) has been investigated by dynamic light scattering in a previously unexplored range of salt and clay concentrations. Specifically the clay weight and salt molar concentrations have been varied in the ranges Cw=0.004- 0.025, Cs=(1x 10^-3- 5x 10^-3) M respectively. As in the case of free salt water samples (Cs= 1x 10^-4 M) an aging dynamics towards two different arrested phases is found in the whole examined Cw and Cs range. Moreover a transition between these two different regimes is found for each investigated salt concentration. It is clear from these measurements that a revision of the phase diagram is necessary and a new "transition" line between two different arrested states is drawn.

B. Ruzicka; L. Zulian; G. Ruocco

2005-09-09

313

Modeling the Round Earth through Diagrams  

NASA Astrophysics Data System (ADS)

Earlier studies have found that students, including adults, have problems understanding the scientifically accepted model of the Sun-Earth-Moon system and explaining day-to-day astronomical phenomena based on it. We have been examining such problems in the context of recent research on visual-spatial reasoning. Working with middle school students in India, we have developed a pedagogical sequence to build the mental model of the Earth and tried it in three schools for socially and educationally disadvantaged students. This pedagogy was developed on the basis of (1) a reading of current research in imagery and visual-spatial reasoning and (2) students' difficulties identified during the course of pretests and interviews. Visual-spatial tools such as concrete (physical) models, gestures, and diagrams are used extensively in the teaching sequence. The building of a mental model is continually integrated with drawing inferences to understand and explain everyday phenomena. The focus of this article is inferences drawn with diagrams.

Padalkar, Shamin; Ramadas, Jayashree

314

Persistence diagrams of cortical surface data.  

PubMed

We present a novel framework for characterizing signals in images using techniques from computational algebraic topology. This technique is general enough for dealing with noisy multivariate data including geometric noise. The main tool is persistent homology which can be encoded in persistence diagrams. These diagrams visually show how the number of connected components of the sublevel sets of the signal changes. The use of local critical values of a function differs from the usual statistical parametric mapping framework, which mainly uses the mean signal in quantifying imaging data. Our proposed method uses all the local critical values in characterizing the signal and by doing so offers a completely new data reduction and analysis framework for quantifying the signal. As an illustration, we apply this method to a 1D simulated signal and 2D cortical thickness data. In case of the latter, extra homological structures are evident in an control group over the autistic group. PMID:19694279

Chung, Moo K; Bubenik, Peter; Kim, Peter T

2009-01-01

315

Voronoi Diagrams for Pure 1-qubit Quantum States  

E-print Network

1-qubit quantum states form a space called the three-dimensional Bloch ball. To compute Holevo capacity, Voronoi diagrams in the Bloch ball with respect to the quantum divergence have been used as a powerful tool. These diagrams basically treat mixed quantum states corresponding to points in the interior of the Bloch ball. Due to the existence of logarithm in the quantum divergence, the diagrams are not defined on pure quantum states corresponding to points on the two-dimensional sphere. This paper first defines the Voronoi diagrams for pure quantum states on the Bloch sphere by the Fubini-Study distance and the Bures distance. We also introduce other Voronoi diagrams on the sphere obtained by taking a limit of Voronoi diagrams for mixed quantum states by the quantum divergences in the Bloch ball. These diagrams are shown to be equivalent to the ordinary Voronoi diagram on the sphere.

Kimikazu Kato; Mayumi Oto; Hiroshi Imai; Keiko Imai

2006-04-14

316

The phase diagram YF-GdF  

Microsoft Academic Search

The binary phase diagram YF-GdF was studied by differential scanning calorimetry (DSC). Yttrium fluoride and gadolinium fluoride show complete miscibility in all three phases (orthorhombic room temperature phase, trigonal or hexagonal high temperature phase, liquid). The transformations between room temperature and high temperature phases are of first order and occur at 1338.6 K (YF) or 1174.8 K (GdF). Melting points

D. Klimm; I. M. Ranieri; R. Bertram; S. L. Baldochi

2008-01-01

317

Communicating Phylogeny: Evolutionary Tree Diagrams in Museums  

E-print Network

History Museum 5 Address: University of Kansas, Lawrence, KS 66045-7593, USA 6 7 Second Author: E. O. Wiley 8 Institution: Ecology & Evolutionary Biology and Biodiversity Institute 9 Address: University of Kansas, Lawrence, KS 66045...IN PRESS (EVOLUTION: EDUCATION AND OUTREACH) 1 Title: Communicating Phylogeny: Evolutionary tree diagrams in museums 2 Running Head: Communicating Phylogeny 3 First Author: Teresa MacDonald 4 Institution: University of Kansas Natural...

MacDonald, Teresa; Wiley, Edward O.

2012-01-01

318

Displaying multimedia environmental partitioning by triangular diagrams  

SciTech Connect

It is suggested that equilateral triangular diagrams are a useful method of depicting the equilibrium partitioning of organic chemicals among the three primary environmental media of the atmosphere, the hydrosphere, and the organosphere (natural organic matter and biotic lipids and waxes). The technique is useful for grouping chemicals into classes according to their partitioning tendencies, for depicting the incremental effects of substituents such as alkyl groups and chlorine, and for showing how partitioning changes in response to changes in temperature.

Lee, S.C.; Mackay, D. [Univ. of Toronto, Ontario (Canada). Dept. of Chemical Engineering and Applied Chemistry

1995-11-01

319

Using Diagrams and Models: 2.75  

NSDL National Science Digital Library

This article discusses the importance of abstraction and generalization in being able to use models and diagrams effectively, whether children are creating their own models to represent a situation and explain their thinking, or interpreting a provided model. The resource offers examples to illustrate these ideas as well as teaching strategies and activities in the areas of parity, mental addition, equivalent fractions, and multi-digit multiplication.

2012-09-26

320

Reentrant phase diagram for granular superconductors  

SciTech Connect

The mean-field phase diagram of the self-charging model of a granular superconductor is calculated using the functional-integral formulation. A pronounced reentrance is obtained in quantitative agreement with a previous calculation, involving 2..pi..-antiperiodic eigenstates of the Mathieu equation. It is argued that low-lying, odd-electron-number excitations play a significant role in the thermodynamics of Josephson-junction arrays, for which the Feynman functional-integral formulation holds.

Simanek, E.

1985-07-01

321

Stability diagrams for coupled Mathieu-equations  

Microsoft Academic Search

A method is described for determining stability diagrams for coupled Mathieu-equations. The boundary curves are found by searching for those almost-periodic solutions of the differential equations for which the real part of the characteristic exponent changes from zero to a non-zero value. The method derives analytic expressions for the involved determinants and is able to find the transition curves even

J. Hansen

1985-01-01

322

Mixed wasted integrated program: Logic diagram  

SciTech Connect

The Mixed Waste Integrated Program Logic Diagram was developed to provide technical alternative for mixed wastes projects for the Office of Technology Development`s Mixed Waste Integrated Program (MWIP). Technical solutions in the areas of characterization, treatment, and disposal were matched to a select number of US Department of Energy (DOE) treatability groups represented by waste streams found in the Mixed Waste Inventory Report (MWIR).

Mayberry, J.; Stelle, S. [Science Applications International Corp., Idaho Falls, ID (United States); O`Brien, M. [Univ. of Arizona, Tucson, AZ (United States); Rudin, M. [Univ. of Nevada, Las Vegas, NV (United States); Ferguson, J. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States); McFee, J. [I.T. Corp., Albuquerque, NM (United States)

1994-11-30

323

The plutonium-oxygen phase diagram  

SciTech Connect

Identification of products formed by the reaction of plutonium metal with liquid water at 23{degree}C indicates that the plutonium-oxygen phase diagram is similar to the cerium-oxygen and praseodymium-oxygen diagrams. Quantitative measurements of H{sub 2} formation and analytical data suggest that a sequence of hydrolysis reactions produces oxide hydrides of trivalent plutonium, Pu{sub 2}O{sub 3}, mixed-valent oxides and PuO{sub 2}. The intermediate oxides are the n {equals} 7, 9, 10 and 12 members of the Pu{sub n}O{sub 2n{minus}2} homologous series. Properties of the residue formed by thermal decomposition of the initial hydrolysis product, plutonium monoxide monhydride (PuOH), are consistent with the formation of metastable plutonium monoxide. Crystal-chemical, thermodynamic, and kinetic factors are evaluated, but definitive assignment of the equilibrium Pu-O diagram is not possible. 22 refs., 6 figs., 1 tab.

Haschke, J.M.

1990-01-01

324

Table of Feynman diagrams of the interacting Fermion Green's function  

NASA Astrophysics Data System (ADS)

The Feynman diagrams of the Green's function expansion of fermions interacting with a nonrelativistic 2-body interaction are displayed in first, second, and third perturbative order of the interaction as 2, 10, and 74 diagrams, respectively. A name convention for the diagrams is proposed and then used to tabulate the diagrams of fourth to seventh order. The Hartree-Fock approximation summons up 2, 8, 40, and 224 of them in first through fourth order.

Mathar, Richard J.

325

Algorithms in electric power system one-line diagram creation  

Microsoft Academic Search

This paper analyzes various algorithms for the automatic generation of electric power system one-line diagrams. Historically these one-line diagrams were created manually. As these diagrams can be large, their manual creation takes a lot of time and resources, and it is also prone to errors. One possible solution to this problem is the automatic generation of one-line diagrams. Automatic visualization

Imre Lendak; Aleksandar Erdeljan; Darko Capko; Srdan Vukmirovic

2010-01-01

326

Indicator diagram of a high pressure pump for cryogenic liquid  

Microsoft Academic Search

sure cycles. The indicator diagram provides a basis for deriving quantitative relationships between pump parameters. To this end we determined experimentally the indicator diagram of a series-produced pump type NZhA-.22M and developed a method of constructing a calculated indicator diagram. It is ,difficult to produce indicator diagrams for high-pressure pumps operating on liquefied gas: ordinary general purpose indicators are unsuitable

E. N. Smirnov; V. I. Epifanova

1969-01-01

327

Voronoi Diagrams of Moving Points in the Plane  

Microsoft Academic Search

Consider a set of n points in the Euclidean plane each of which is continuously moving along a given trajectory. At each instant in time, the points define a Voronoi diagram. As the points move, the Voronoi diagram changes continuously, but at certain critical instants in time, topological events occur that cause a change in the Delaunay diagram. In this

Leonidas J. Guibas; Joseph S. B. Mitchell; Thomas Roos

1991-01-01

328

Symbolic Reasoning with Weighted and Normalized Decision Diagrams  

Microsoft Academic Search

Several variants of Bryant's ordered binary decision diagrams have been suggested in the literature to reason about discrete functions. In this paper, we introduce a generic notion of weighted decision diagrams that captures many of them and present criteria for canonic- ity. As a special instance of such weighted diagrams, we introduce a new BDD-variant for real-valued functions, called normalized

Jörn Ossowski; Christel Baier

2006-01-01

329

A vector diagram of Maxwell's equations for chiral media  

Microsoft Academic Search

A vector diagram of Maxwell's time-harmonic equations in homogeneous isotropic media is proposed and derived to include chiral media. This diagram may be used to obtain a number of common relationships between fields, potentials and sources by equating appropriate components of the vectors in it. The construction of the diagram is based on the formal similarity between many theorems of

S. Uckun

1998-01-01

330

Assessing the Comprehension of UML Class Diagrams via Eye Tracking  

Microsoft Academic Search

Eye-tracking equipment is used to assess how well a subject comprehends UML class diagrams. The results of a study are presented in which eye movements are captured in a non-obtrusive manner as users performed various comprehension tasks on UML class diagrams. The goal of the study is to identify specific characteristics of UML class diagrams, such as layout, color, and

Shehnaaz Yusuf; Huzefa H. Kagdi; Jonathan I. Maletic

2007-01-01

331

The Family Diagram and Genogram: Comparisons and Contrasts  

Microsoft Academic Search

The family diagram and its derivative the genogram are widely used in marriage and family therapy, other mental health disciplines, and family medicine. After a brief history of the origins of the family diagram and genogram, several different areas are compared in order to help distinguish differences between family diagrams and genograms. The results of these evaluations illustrate some similarities

John F. Butler

2008-01-01

332

Density-Enthalpy Phase Diagram 0D Boiler Simulation  

E-print Network

Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research Finite Transitions #12;Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research;Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research Goal

Vuik, Kees

333

DARLS: Differencing and Merging Diagrams Using Dual View, Animation,  

E-print Network

DARLS: Differencing and Merging Diagrams Using Dual View, Animation, Re-Layout, Layers, Animation, Re-Layout, Layers and a Storyboard, short "DARLS". It is targeted at diagrams where node and edge. It presents the union of nodes and edges in figure 1. DARLS showing two versions of a diagram, which

Stürzlinger, Wolfgang

334

Modelling network problems with power flow equations and diagrams  

Microsoft Academic Search

This paper focuses on the modelling of electrical utility networks, their problems and solutions in a network-planning environment. Equivalent single-line diagrams, vector diagrams and power flow diagrams are derived and used for each specific problem within a specific network

F. J. Rossouw; H. J. Beukes; J. H. R. Enslin

1999-01-01

335

Block copolymer nanocontainers.  

PubMed

Using cell dynamics computer simulation, we perform a systematic study of thin block copolymer films around a nanoparticle. Lamellar-, cylinder-, and sphere-forming block copolymers are investigated with respect to different film thicknesses, particle radii, and boundary conditions at the film interfaces. The obtained structures include standing lamellae and cylinders, "onions", cylinder "knitting balls", "golf ball", layered spherical, "virus"-like and mixed morphologies with T-junctions and U-type defects. The kinetics of the structure formation and difference with planar thin films are discussed. Our simulations suggest that novel porous nanocontainers can be formed by the coating of a sacrificial nanobead by a block copolymer layer with a well-controlled nanostructure. In addition, first scanning force microscopy experiments on a model system reveal surface structures similar to those predicted by our simulations. PMID:20496954

Pinna, Marco; Hiltl, Stephanie; Guo, Xiaohu; Böker, Alexander; Zvelindovsky, Andrei V

2010-05-25

336

Blocks and Screws  

NSDL National Science Digital Library

In this lesson, each student is given a block of wood and a screw (or nail), and is asked to put the screw into the block, without any tool (like a screwdriver or hammer). Their efforts, with varying success, lead to a discussion of contrivances, using various items and strategies as make-do (contrived) tools for which they were not intended, and an exploration of many examples of contrivances or adaptive compromises and other imperfections in the living world, especially in humans. This situation may be better explained by evolution rather than the result of intelligent design.

Patterson, Tim

337

Bactericidal block copolymer micelles.  

PubMed

Block copolymer micelles with bactericidal properties were designed to deactivate pathogens such as E. coli bacteria. The micelles of PS-b-PAA and PS-b-P4VP block copolymers were loaded with biocides TCMTB or TCN up to 20 or 30?wt.-%, depending on the type of antibacterial agent. Bacteria were exposed to loaded micelles and bacterial deactivation was evaluated. The micelles loaded with TCN are bactericidal; bacteria are killed in less than two minutes of exposure. The most likely interpretation of the data is that the biocide is transferred to the bacteria by repeated micelle/bacteria contacts, and not via the solution. PMID:21275041

Vyhnalkova, Renata; Eisenberg, Adi; van de Ven, Theo

2011-05-12

338

Domain-specific languages and diagram customization for a concurrent engineering environment  

NASA Astrophysics Data System (ADS)

A major open question for advocates of Model-Based Systems Engineering (MBSE) is the question of how system and subsystem engineers will work together. The Systems Modeling Language (SysML), like any language intended for a large audience, is in tension between the desires for simplicity and for expressiveness. In order to be more expressive, many specialized language elements may be introduced, which will unfortunately make a complete understanding of the language a more daunting task. While this may be acceptable for systems modelers, it will increase the challenge of including subsystem engineers in the modeling effort. One possible answer to this situation is the use of Domain-Specific Languages (DSL), which are fully supported by the Unified Modeling Language (UML). SysML is in fact a DSL for systems engineering. The expressive power of a DSL can be enhanced through the use of diagram customization. Various domains have already developed their own schematic vocabularies. Within the space engineering community, two excellent examples are the propulsion and telecommunication subsystems. A return to simple box-and-line diagrams (e.g., the SysML Internal Block Diagram) are in many ways a step backward. In order allow subsystem engineers to contribute directly to the model, it is necessary to make a system modeling tool at least approximate in accessibility to drawing tools like Microsoft PowerPoint and Visio. The challenge is made more extreme in a concurrent engineering environment, where designs must often be drafted in an hour or two. In the case of the Jet Propulsion Laboratory's Team X concurrent design team, a subsystem is specified using a combination of PowerPoint for drawing and Excel for calculation. A pilot has been undertaken in order to meld the drawing portion and the production of master equipment lists (MELs) via a SysML authoring tool, MagicDraw. Team X currently interacts with its customers in a process of sharing presentations. There are severa- inefficiencies that arise from this situation. The first is that a customer team must wait two weeks to a month (which is 2-4 times the duration of most Team X studies themselves) for a finalized, detailed design description. Another is that this information must be re-entered by hand into the set of engineering artifacts and design tools that the mission concept team uses after a study is complete. Further, there is no persistent connection to Team X or institutionally shared formulation design tools and data after a given study, again reducing the direct reuse of designs created in a Team X study. This paper presents the underpinnings of subsystem DSLs as they were developed for this pilot. This includes specialized semantics for different domains as well as the process by which major categories of objects were derived in support of defining the DSLs. The feedback given to us by the domain experts on usability, along with a pilot study with the partial inclusion of these tools is also discussed.

Cole, B.; Dubos, G.; Banazadeh, P.; Reh, J.; Case, K.; Wang, Y.; Jones, S.; Picha, F.

339

A PK2/Bv8/PROK2 antagonist suppresses tumorigenic processes by inhibiting angiogenesis in glioma and blocking myeloid cell infiltration in pancreatic cancer.  

PubMed

Infiltration of myeloid cells in the tumor microenvironment is often associated with enhanced angiogenesis and tumor progression, resulting in poor prognosis in many types of cancer. The polypeptide chemokine PK2 (Bv8, PROK2) has been shown to regulate myeloid cell mobilization from the bone marrow, leading to activation of the angiogenic process, as well as accumulation of macrophages and neutrophils in the tumor site. Neutralizing antibodies against PK2 were shown to display potent anti-tumor efficacy, illustrating the potential of PK2-antagonists as therapeutic agents for the treatment of cancer. In this study we demonstrate the anti-tumor activity of a small molecule PK2 antagonist, PKRA7, in the context of glioblastoma and pancreatic cancer xenograft tumor models. For the highly vascularized glioblastoma, PKRA7 was associated with decreased blood vessel density and increased necrotic areas in the tumor mass. Consistent with the anti-angiogenic activity of PKRA7 in vivo, this compound effectively reduced PK2-induced microvascular endothelial cell branching in vitro. For the poorly vascularized pancreatic cancer, the primary anti-tumor effect of PKRA7 appears to be mediated by the blockage of myeloid cell migration/infiltration. At the molecular level, PKRA7 inhibits PK2-induced expression of certain pro-migratory chemokines and chemokine receptors in macrophages. Combining PKRA7 treatment with standard chemotherapeutic agents resulted in enhanced effects in xenograft models for both types of tumor. Taken together, our results indicate that the anti-tumor activity of PKRA7 can be mediated by two distinct mechanisms that are relevant to the pathological features of the specific type of cancer. This small molecule PK2 antagonist holds the promise to be further developed as an effective agent for combinational cancer therapy. PMID:23372791

Curtis, Valerie F; Wang, Hui; Yang, Pengyuan; McLendon, Roger E; Li, Xiaohan; Zhou, Qun-Yong; Wang, Xiao-Fan

2013-01-01

340

Illinois PER Interactive Examples: Two Blocks on an Incline  

NSDL National Science Digital Library

This is an interactive homework problem for introductory physics students relating to interacting forces in a system featuring an incline plane, two blocks of equal mass, and an ideal pulley. Given the angles of incline, mass of the blocks, and coefficient of friction, students are required to determine the acceleration of the block moving up the incline. A user-activated "help" sequence is provided for each step of the problem-solving, including conceptual analysis, free-body diagrams, and tips to set up the calculations. To promote critical thinking, immediate feedback is received for both correct and incorrect responses. This item is part of a larger collection of interactive homework problems for introductory physics.

Gladding, Gary

2008-09-12

341

A Place for Block Play.  

ERIC Educational Resources Information Center

Discusses the importance of block play--including its contributions to perceptual, fine motor, and cognitive development--and components of a good preschool block play area. Recommends unit blocks complemented by stacking blocks, toys, beads, cubes, and Brio wooden toys. Makes recommendations for space, size, locations and connections to other…

Moore, Gary T.

1997-01-01

342

On the Cu-Nb Phase Diagram and Solidified Microstructures  

NASA Technical Reports Server (NTRS)

Container and containerless processing was employed to determine liquidus temperatures and to examine microstructural development in the Cu-Nb system. The Cu-Nb phase diagram of an S-shaped, near-horizontal liquidus, has been confirmed by both the temperature-time profiles and resultant microstructures with only Nb dendrites in a Cu matrix, which were obtained from crucible experiments under clean conditions. However, the microstructural pathways of Cu-Nb alloys are particularly sensitive to processing variables. By the addition of oxygen impurities or rapid solidification, droplet-shaped morphology was observed for some compositions, implying occurrence of a liquid-phase separation. The effects of impurities and cooling rates are analyzed in connection with a stable and metastable liquid miscibility gap, respectively.

Li, D.; Robinson, M. B.; Rathz, T. J.; Williams, G.

1998-01-01

343

A Diagram Editor for Efficient Biomedical Knowledge Capture and Integration  

PubMed Central

Understanding the molecular mechanisms underlying complex disorders requires the integration of data and knowledge from different sources including free text literature and various biomedical databases. To facilitate this process, we created the Biomedical Concept Diagram Editor (BCDE) to help researchers distill knowledge from data and literature and aid the process of hypothesis development. A key feature of BCDE is the ability to capture information with a simple drag-and-drop. This is a vast improvement over manual methods of knowledge and data recording and greatly increases the efficiency of the biomedical researcher. BCDE also provides a unique concept matching function to enforce consistent terminology, which enables conceptual relationships deposited by different researchers in the BCDE database to be mined and integrated for intelligible and useful results. We hope BCDE will promote the sharing and integration of knowledge from different researchers for effective hypothesis development. PMID:21347131

Yu, Bohua; Jakupovic, Elvis; Wilson, Justin; Dai, Manhong; Xuan, Weijian; Mirel, Barbara; Athey, Brian; Watson, Stanley; Meng, Fan

2008-01-01

344

Ischemic Nerve Block.  

ERIC Educational Resources Information Center

This experiment investigated the capability for movement and muscle spindle function at successive stages during the development of ischemic nerve block (INB) by pressure cuff. Two male subjects were observed under six randomly ordered conditions. The duration of index finger oscillation to exhaustion, paced at 1.2Hz., was observed on separate…

Williams, Ian D.

345

Spice Blocks Melanoma Growth  

ERIC Educational Resources Information Center

Curcumin, the pungent yellow spice found in both turmeric and curry powders, blocks a key biological pathway needed for development of melanoma and other cancers, according to a study that appears in the journal Cancer. Researchers from The University of Texas M. D. Anderson Cancer Center demonstrate how curcumin stops laboratory strains of…

Science Teacher, 2005

2005-01-01

346

2000 CENSUS BLOCK BOUNDARIES  

EPA Science Inventory

This data set is a polygon shapefile of the boundaries of Census Blocks in New England derived from U.S. Census Bureau 2000 TIGER/Line data. Numerous attributes pertaining to population are included. TIGER, TIGER/Line, and Census TIGER are registered trademarks of the Bureau o...

347

y? Diagram, a powerful optical design method for laser systems.  

PubMed

We present a new method for synthesizing and analyzing laser systems based on the use of the y? diagram. The diagram is commonly used to represent two rays, the marginal and the chief rays, as they propagate through an optical system. Since a Gaussian beam can be represented by two rays, it is possible to use the y? diagram to represent these rays. This results in a representation of the beam as a single ray line on the y? diagram with simple graphic interpretations for the beam parameters. An equivalent representation of the Gaussian beam on the u? diagram is also presented and discussed. Complex design problems may be reduced to simple graphic problems, which often lead directly to algebraic solutions. Examples of y? diagrams are given for beam transfer through simple optical systems, including gradient optics. Diagram transformations are discussed and design examples are given of a three-element afocal system and a three-element collimator. PMID:20725196

Kessler, D; Shack, R V

1992-05-20

348

State-Transition Diagrams for Biologists  

PubMed Central

It is clearly in the tradition of biologists to conceptualize the dynamical evolution of biological systems in terms of state-transitions of biological objects. This paper is mainly concerned with (but obviously not limited too) the immunological branch of biology and shows how the adoption of UML (Unified Modeling Language) state-transition diagrams can ease the modeling, the understanding, the coding, the manipulation or the documentation of population-based immune software model generally defined as a set of ordinary differential equations (ODE), describing the evolution in time of populations of various biological objects. Moreover, that same UML adoption naturally entails a far from negligible representational economy since one graphical item of the diagram might have to be repeated in various places of the mathematical model. First, the main graphical elements of the UML state-transition diagram and how they can be mapped onto a corresponding ODE mathematical model are presented. Then, two already published immune models of thymocyte behavior and time evolution in the thymus, the first one originally conceived as an ODE population-based model whereas the second one as an agent-based one, are refactored and expressed in a state-transition form so as to make them much easier to understand and their respective code easier to access, to modify and run. As an illustrative proof, for any immunologist, it should be possible to understand faithfully enough what the two software models are supposed to reproduce and how they execute with no need to plunge into the Java or Fortran lines. PMID:22844438

Bersini, Hugues; Klatzmann, David; Six, Adrien; Thomas-Vaslin, Veronique

2012-01-01

349

Predicting Allostery Wiring Diagrams within Motor Proteins  

NASA Astrophysics Data System (ADS)

Motor proteins are intricate molecular machines that make use of allostery as a basis of their function. Fundamental questions in trying to understand the operational mechanism of the motors is, therefore, how allostery communicated is within the proteins, what are the pathways that transmit allosteric signals, how to model and predict them. We have proposed a normal-mode analysis based perturbation model that predicts the pathways based on the structure and chemical composition of the molecules. We use the model to investigate allosteric pathways (allostery wiring diagrams) within motor proteins myosin V and VI.

Tehver, Riina

2013-03-01

350

More on the Phase Diagram of Laponite  

Microsoft Academic Search

The phase diagram of a charged colloidal system (Laponite) has been\\u000ainvestigated by dynamic light scattering in a previously unexplored range of\\u000asalt and clay concentrations. Specifically the clay weight and salt molar\\u000aconcentrations have been varied in the ranges Cw=0.004- 0.025, Cs=(1x 10^-3- 5x\\u000a10^-3) M respectively. As in the case of free salt water samples (Cs= 1x 10^-4

B. Ruzicka; L. Zulian; G. Ruocco

2006-01-01

351

The QCD Phase Diagram: Expectations and Challenges  

E-print Network

A survey is given of recent QCD theory advances concerning the phase diagram, in particular the indications for a critical point and adjacent first order phase transition at high baryo-chemical potential, and the new ideas concerning a further phase at high $\\mu_{B}$, the quarkyonic matter phase. The latter state might finally explain the hadro-chemical equilibrium freeze-out points from A+A collisions at energies below SPS energy. We review several event-by-event fluctuation signals that promise to shed a light on the existence of a critical point, and we discuss its possible reflection in recent lattice QCD calculations.

Reinhard Stock

2009-09-03

352

1 of 3 + 1 page diagram Process Engineering Thermodynamics  

E-print Network

. The temperature change and composition change of the ambient air may be neglected. Data: specific heat for N2 cp. At a surroundings temperature of 25°C, 1 kg ice with temperature -5°C is mixed with 4 kg liquid water of 80°C, giving 5 kg liquid water of a certain temperature T. a. What is the amount of work that may be obtained

Zevenhoven, Ron

353

Morphology and phase diagram of ABC linear triblock copolymers: Parallel real-space self-consistent-field-theory simulation  

NASA Astrophysics Data System (ADS)

A parallel algorithm designed for widely used distributed computer clusters is developed for the real-space self-consistent-field theory for polymers. We adopt an efficient data partition method to ensure high performance of this parallel algorithm on clusters, which enables us to explore unknown phase structures of complex block polymers with high accuracy and efficiency. As a benchmark test, the algorithm is applied to an ABC linear triblock copolymer, in which the volume fractions of the two end blocks of the polymer chain are equal (fA=fC) , to simplify the discussion. The three-dimensional microphases and phase diagram of this triblock copolymer are investigated in detail.

Sun, Mingzhu; Wang, Peng; Qiu, Feng; Tang, Ping; Zhang, Hongdong; Yang, Yuliang

2008-01-01

354

Star-Like Micelles with Star-Like Interactions: A quantitative Evaluation of Structure Factor and Phase Diagram  

E-print Network

PEP-PEO block copolymer micelles offer the possibility to investigate phase behaviour and interactions of star polymers (ultra-soft colloids). A star-like architecture is achieved by an extremely asymmetric block ratio (1:20). Micellar functionality f can be smoothly varied by changing solvent composition (interfacial tension). Structure factors obtained by SANS can be quantitatively described in terms of an effective potential developed for star polymers. The experimental phase diagram reproduces to a high level of accuracy the predicted liquid/solid transition. Whereas for intermediate f a bcc phase is observed, for high f the formation of a fcc phase is preempted by glass formation.

M. Laurati; J. Stellbrink; R. Lund; L. Willner; D. Richter; E. Zaccarelli

2005-05-04

355

The efficiency and effectiveness of utilizing diagrams in interviews: an assessment of participatory diagramming and graphic elicitation  

PubMed Central

Background This paper focuses on measuring the efficiency and effectiveness of two diagramming methods employed in key informant interviews with clinicians and health care administrators. The two methods are 'participatory diagramming', where the respondent creates a diagram that assists in their communication of answers, and 'graphic elicitation', where a researcher-prepared diagram is used to stimulate data collection. Methods These two diagramming methods were applied in key informant interviews and their value in efficiently and effectively gathering data was assessed based on quantitative measures and qualitative observations. Results Assessment of the two diagramming methods suggests that participatory diagramming is an efficient method for collecting data in graphic form, but may not generate the depth of verbal response that many qualitative researchers seek. In contrast, graphic elicitation was more intuitive, better understood and preferred by most respondents, and often provided more contemplative verbal responses, however this was achieved at the expense of more interview time. Conclusion Diagramming methods are important for eliciting interview data that are often difficult to obtain through traditional verbal exchanges. Subject to the methodological limitations of the study, our findings suggest that while participatory diagramming and graphic elicitation have specific strengths and weaknesses, their combined use can provide complementary information that would not likely occur with the application of only one diagramming method. The methodological insights gained by examining the efficiency and effectiveness of these diagramming methods in our study should be helpful to other researchers considering their incorporation into qualitative research designs. PMID:18691410

Umoquit, Muriah J; Dobrow, Mark J; Lemieux-Charles, Louise; Ritvo, Paul G; Urbach, David R; Wodchis, Walter P

2008-01-01

356

Associative list processing unit  

DOEpatents

An associative list processing unit and method comprising employing a plurality of prioritized cell blocks and permitting inserts to occur in a single clock cycle if all of the cell blocks are not full. Also, an associative list processing unit and method comprising employing a plurality of prioritized cell blocks and using a tree of prioritized multiplexers descending from the plurality of cell blocks.

Hemmert, Karl Scott; Underwood, Keith D.

2013-01-29

357

A Fault Tree Analysis Strategy Using Binary Decision Diagrams. Karen A. Reay and John D. Andrews  

E-print Network

1 A Fault Tree Analysis Strategy Using Binary Decision Diagrams. Karen A. Reay and John D. Andrews (BDDs) in fault tree analysis provides both an accurate and efficient means of analysing a system. There is a problem however, with the conversion process of the fault tree to the BDD. The variable ordering scheme

358

A Multi-layer Parsing Strategy for On-line Recognition of Hand-drawn Diagrams  

Microsoft Academic Search

The existing sketch recognizers perform only a limited drawing recognition since they process simple sketches, or rely on drawing style assumptions that reduce the recognition complexity, and in most cases they require a substantial amount of training data. In this paper we present a parsing strategy for the recognition of hand-drawn diagrams that can be used in interactive sketch interfaces.

Gennaro Costagliola; Vincenzo Deufemia; Michele Risi

2006-01-01

359

Change Diagram : A behavioural model for very speed VLSI circuit\\/highly parallel systems  

Microsoft Academic Search

The paper proposes a formal moded, named change diagram, for analysis and synthesis of the very high speed complex VLSI circuitslsystems. The CD allows f o r unambiguous expression of concurrent activities riot only of distributive processes, but also those of serni-modular. The equivalence of CDs and Petri Nets is investigated too. Possible usage of CDs in new generation simulators

A. Kondratyev; A. Taubin; V. Varshavskyl; M. Kishinevsky; E. E. Pissaloux

1994-01-01

360

Colour Magnitude Diagrams of Transiting Exoplanets  

NASA Astrophysics Data System (ADS)

Colour-Magnitude diagrams form a traditional way of representing luminous objects in the Universe and compare them to each others. Here, the photometric distances of 44 transiting exoplanetary systems were estimated. For seven of those, parallaxes confirm the methodology. From the combination of those measurements with fluxes obtained while planets were occulted by their host stars, colour-magnitude diagrams are composed in the near and mid IR. When possible, planets are plotted with field brown dwarfs who often have similar sizes and equilibrium temperatures, thus offering a natural empirical comparison sample. Exoplanets are also compared to the expected loci of pure blackbodies. In general planets do not agree with the brown dwarfs sequences, and neither do they match blackbodies. It is however possible to affirm that they are not featureless and that they display an increasing diversity in colour with decreasing intrinsic luminosity. A missing source of absorption within the [4.5 ?m] band, for some planets, would generally reconcile hot Jupiters with brown dwarfs’ cool atmospheres. Alternatively, measuring the emission of gas giants cooler than 1 000 K would disentangle whether planets’ atmospheres behave like brown dwarfs’ atmospheres, like blackbodies, or whether they form their own sequence.

Triaud, Amaury H. M. J.

2014-06-01

361

Accurate phase diagram of tetravalent DNA nanostars  

E-print Network

We evaluate, by means of molecular dynamics simulations employing a realistic DNA coarse-grained model, the phase behaviour and the structural and dynamic properties of tetravalent DNA nanostars, i.e. nanoconstructs completely made of DNA. We find that, as the system is cooled down, tetramers undergo a gas--liquid phase separation in a region of concentrations which, if the difference in salt concentration is taken into account, is comparable with the recently measured experimental phase diagram [S. Biffi \\textit{et al}, Proc. Natl. Acad. Sci, \\textbf{110}, 15633 (2013)]. We also present a mean-field free energy for modelling the phase diagram based on the bonding contribution, derived by Wertheim in its studies of associating liquids, combined with mass action law expressions appropriate for DNA binding and a numerically evaluated reference free energy. The resulting free energy qualitatively reproduces the numerical data. Finally, we report information on the nanostar structure, e.g. geometry and flexibility of the single tetramer and of the collective behaviour, providing a useful reference for future small angle scattering experiments, for all investigated temperatures and concentrations.

Lorenzo Rovigatti; Francesca Bomboi; Francesco Sciortino

2014-01-13

362

Magnetic phase diagrams of UNiGe  

SciTech Connect

UNiGe undergoes two magnetic transitions in zero field. Here, the magnetic diagrams of UNiGe for B {parallel} b and B {parallel} c are reported. We performed temperatures scans of the magnetization in static magnetic fields up to 19.5T applied along the b and c axes. For both orientations 3 magnetic phases have been identified in the B-T diagrams. We confirmed the previously reported phase boundaries for B {parallel} c, and in addition we determined the location of the phase boundaries for B {parallel} b. We discuss a possible relationship of the two zero-field antiferromagnetic phases (commensurate: T<42K; incommensurate: 42K

Nakotte, H. [Los Alamos National Lab., NM (United States); Hagmusa, I.H.; Klaasse, J.C.P. [Univ. of Amsterdam (Netherlands). Van der Waals-Zeeman Inst.; Nakotte, H.; Lacerda, A.H. [Los Alamos National Lab., NM (United States); Hagmusa, I.H.; Klaasse, J.C.P. [Univ. of Amsterdam (Netherlands). Van der Waals-Zeeman Institute] [and others

1997-11-01

363

Instability Regions in the Upper HR Diagram  

NASA Technical Reports Server (NTRS)

The following instability regions for blueward evolving supergiants are outlined and compared: (1) Areas in the Hertzsprung-Russell(HR) diagram where stars are dynamically unstable. (2) Areas where the effective acceleration in the upper part of the photospheres is negative, hence directed outward. (3) Areas where the sonic points of the stellar wind (Where wind velocity = sound velocity) are situated inside the photospheres, at a level deeper than tau(sub Ross) = 0.01. We compare the results with the positions of actual stars in the HR diagram and we find evidence that the recent strong contraction of the yellow hypergiant HR8752 was initiated in a period during which (g(sub eff)) is less than 0, whereupon the star became dynamically unstable. The instability and extreme shells around IRC+10420 are suggested to be related to three factors: (g(sub eff)) is less than 0; the sonic point is situated inside the photosphere; and the star is dynamically unstable.

deJager, Cornelis; Lobel, Alex; Nieuwenhuijzen, Hans; Stothers, Richard; Hansen, James E. (Technical Monitor)

2001-01-01

364

Revisiting the phase diagram of hard ellipsoids  

NASA Astrophysics Data System (ADS)

In this work, the well-known Frenkel-Mulder phase diagram of hard ellipsoids of revolution [D. Frenkel and B. M. Mulder, Mol. Phys. 55, 1171 (1985)] is revisited by means of replica exchange Monte Carlo simulations. The method provides good sampling of dense systems and so, solid phases can be accessed without the need of imposing a given structure. At high densities, we found plastic solids and fcc-like crystals for semi-spherical ellipsoids (prolates and oblates), and SM2 structures [P. Pfleiderer and T. Schilling, Phys. Rev. E 75, 020402 (2007)] for x : 1-prolates and 1 : x-oblates with x >= 3. The revised fluid-crystal and isotropic-nematic transitions reasonably agree with those presented in the Frenkel-Mulder diagram. An interesting result is that, for small system sizes (100 particles), we obtained 2:1- and 1.5:1-prolate equations of state without transitions, while some order is developed at large densities. Furthermore, the symmetric oblate cases are also reluctant to form ordered phases.

Odriozola, Gerardo

2012-04-01

365

Liquid blocking check valve  

DOEpatents

A liquid blocking check valve useful particularly in a pneumatic system utilizing a pressurized liquid fill chamber. The valve includes a floatable ball disposed within a housing defining a chamber. The housing is provided with an inlet aperture disposed in the top of said chamber, and an outlet aperture disposed in the bottom of said chamber in an offset relation to said inlet aperture and in communication with a cutaway side wall section of said housing.

Merrill, John T. (Pleasant Hill, CA)

1984-01-01

366

Equilibrium p-T Phase Diagram of Boron: Experimental Study and Thermodynamic Analysis  

PubMed Central

Solid-state phase transformations and melting of high-purity crystalline boron have been in situ and ex situ studied at pressures to 20?GPa in the 1500–2500?K temperature range where diffusion processes become fast and lead to formation of thermodynamically stable phases. The equilibrium phase diagram of boron has been constructed based on thermodynamic analysis of experimental and literature data. The high-temperature part of the diagram contains p-T domains of thermodynamic stability of rhombohedral ?-B106, orthorhombic ?-B28, pseudo-cubic (tetragonal) t'-B52, and liquid boron (L). The positions of two triple points have been experimentally estimated, i.e. ?–t'–L at ~ 8.0?GPa and ~ 2490?K; and ?–?–t' at ~ 9.6?GPa and ~ 2230?K. Finally, the proposed phase diagram explains all thermodynamic aspects of boron allotropy and significantly improves our understanding of the fifth element. PMID:23912523

Solozhenko, Vladimir L.; Kurakevych, Oleksandr O.

2013-01-01

367

Stylistic and Lexical Co-training for Web Block Classification  

E-print Network

shows that the co-training process results in a reduction of 28.5% in error rate over a single scheme. Many algorithms benefit from using fine-grained blocks rather than uniformly processingStylistic and Lexical Co-training for Web Block Classification Chee How Lee National University

Kan, Min-Yen

368

31 CFR 585.302 - Blocked account; blocked property.  

Code of Federal Regulations, 2010 CFR

...THE TREASURY FEDERAL REPUBLIC OF YUGOSLAVIA (SERBIA AND MONTENEGRO) AND BOSNIAN SERB-CONTROLLED AREAS OF THE REPUBLIC OF BOSNIA AND HERZEGOVINA SANCTIONS REGULATIONS General Definitions § 585.302 Blocked account; blocked property. The...

2010-07-01

369

31 CFR 588.301 - Blocked account; blocked property.  

... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WESTERN BALKANS STABILIZATION REGULATIONS General Definitions § 588.301 Blocked account; blocked property. The terms...

2014-07-01

370

31 CFR 558.301 - Blocked account; blocked property.  

...Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY SOUTH SUDAN SANCTIONS REGULATIONS General Definitions § 558.301 Blocked account; blocked property. The terms...

2014-07-01

371

31 CFR 547.302 - Blocked account; blocked property.  

...Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY DEMOCRATIC REPUBLIC OF THE CONGO SANCTIONS REGULATIONS General Definitions § 547.302 Blocked account; blocked...

2014-07-01

372

31 CFR 547.302 - Blocked account; blocked property.  

Code of Federal Regulations, 2011 CFR

...Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY DEMOCRATIC REPUBLIC OF THE CONGO SANCTIONS REGULATIONS General Definitions § 547.302 Blocked account; blocked...

2011-07-01

373

31 CFR 547.302 - Blocked account; blocked property.  

Code of Federal Regulations, 2012 CFR

...Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY DEMOCRATIC REPUBLIC OF THE CONGO SANCTIONS REGULATIONS General Definitions § 547.302 Blocked account; blocked...

2012-07-01

374

31 CFR 547.302 - Blocked account; blocked property.  

Code of Federal Regulations, 2013 CFR

...Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY DEMOCRATIC REPUBLIC OF THE CONGO SANCTIONS REGULATIONS General Definitions § 547.302 Blocked account; blocked...

2013-07-01

375

31 CFR 547.302 - Blocked account; blocked property.  

Code of Federal Regulations, 2010 CFR

...Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY DEMOCRATIC REPUBLIC OF THE CONGO SANCTIONS REGULATIONS General Definitions § 547.302 Blocked account; blocked...

2010-07-01

376

31 CFR 540.301 - Blocked account; blocked property.  

...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY HIGHLY ENRICHED URANIUM (HEU) AGREEMENT ASSETS CONTROL REGULATIONS General Definitions § 540.301 Blocked account; blocked property....

2014-07-01

377

Developing grain boundary diagrams as a materials science tool: A case study of nickel-doped molybdenum  

SciTech Connect

Impurity-based, premelting-like, grain boundary (GB) ''phases'' (complexions) can form in alloys and influence sintering, creep, and microstructural development. Calculation of Phase Diagrams (CalPhaD) methods and Miedema-type statistical interfacial thermodynamic models are combined to forecast the formation and stability of subsolidus quasiliquid GB phases in binary alloys. This work supports a long-range scientific goal of developing ''GB (phase) diagrams'' as a new materials science tool to help controlling the materials fabrication processing and resultant materials properties. Using nickel-doped molybdenum as a model system, a type of GB diagram (called ''{lambda} diagram'') is computed to represent the temperature- and composition-dependent thermodynamic tendency for general GBs to disorder. Subsequently, controlled sintering experiments are conducted to estimate the GB diffusivity as a function of temperature and overall composition, and the experimental results correlate well with the computed GB diagram. Although they are not yet rigorous GB-phase diagrams with well-defined transition lines, the predictability and usefulness of such {lambda} diagrams are demonstrated. Related interfacial thermodynamic models and computational approaches are discussed.

Shi Xiaomeng; Luo Jian [School of Materials Science and Engineering, Center for Optical Materials Science and Engineering Technologies, Clemson University, Clemson, South Carolina 29634 (United States)

2011-07-01

378

A reversibly switching block copolymer surface.  

PubMed

We present linear (AB)(n)() multiblock copolymers that exhibit a thermally induced reversible alteration of the surface composition at a sharply defined transition temperature T(s) of 120-170 degrees C depending on the polymer structure. At temperatures below T(s) the surface consists of block A, a 4,4'-methylenediphenyl diisocyanate (4,4'-MDI) type polyurea, whereas above T(s) the hydrophobic block B, a poly(ricinoleic acid hexanediol ester) dominates the surface composition. The ratio of surface concentrations c(A)/c(B) changes by a factor of at least 1000 within an analyzed depth of approximately 10 A. The full A-B surface transition is obtained within minutes. A mechanism is proposed where microphase crystallization of block A in the bulk effectively locks surface segregation of the hydrophobic block B, yielding an A-rich surface. The topology of the copolymers imposes sufficient restrictions for the lateral separation of the connected constituents such that surface segregation is largely reduced. Only above the transition temperature T(s) of microphase crystallization of block A can block B segregate to the surface, yielding a B-rich surface. Such a scheme of competing self-organizing processes in copolymers may potentially be used to reversibly switch surface properties such as adhesion and wetting in various applications. PMID:16262322

Reihs, Karsten; Voetz, Matthias

2005-11-01

379

Voronoi diagrams generated by regressing edges of precipitation fronts  

NASA Astrophysics Data System (ADS)

Reaction-diffusion systems where one of the reagents (outer electrolyte) penetrates into a gel by diffusion and forms a precipitate with the other reagent (inner electrolyte) homogenized in the gel, are able to produce various complex precipitation patterns. The previously studied NaOH+AgNO3 and recently discovered CuCl2+K3[Fe(CN)6] processes, (where the first reagent is the outer electrolyte and the other is the inner electrolyte homogenized in the gel), when reacted using the above mentioned method, are able to generate tessellations of a plane by a mechanism dependant on the dynamics of so-called regressing edges of the reaction fronts. The spontaneous partitioning of the reacted phases results in the construction of a pattern analogous to a Voronoi diagram or one of their generalizations.

de Lacy Costello, Benjamin P. J.; Hantz, Péter; Ratcliffe, Norman M.

2004-02-01

380

THE EXTRAGALACTIC DISTANCE DATABASE: COLOR-MAGNITUDE DIAGRAMS  

SciTech Connect

The color-magnitude diagrams/tip of the red giant branch (CMDs/TRGB) section of the Extragalactic Distance Database contains a compilation of observations of nearby galaxies from the Hubble Space Telescope. Approximately 250 (and increasing) galaxies in the Local Volume have CMDs and the stellar photometry tables used to produce them available through the Web. Various stellar populations that make up a galaxy are visible in the CMDs, but our primary purpose for collecting and analyzing these galaxy images is to measure the TRGB in each. We can estimate the distance to a galaxy by using stars at the TRGB as standard candles. In this paper, we describe the process of constructing the CMDs and make the results available to the public.

Jacobs, Bradley A.; Tully, R. Brent [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Rizzi, Luca [United Kingdom Infrared Telescope, 660 N. A'ohoku Pl., Hilo, HI 96720 (United States); Shaya, Edward J. [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States); Makarov, Dmitry I.; Makarova, Lidia [Isaac Newton Institute of Chile, SAO Branch (Russian Federation)

2009-08-15

381

View southeast of caps for blocks for JFK; blocks are ...  

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

View southeast of caps for blocks for JFK; blocks are used to support ship when it is repositioned to paint inaccessible areas masked by original support blocks. - Naval Base Philadelphia-Philadelphia Naval Shipyard, Carpentry Shop, League Island, Philadelphia, Philadelphia County, PA

382

Modernized system for the automatic regulation of the flotation process  

SciTech Connect

An improved system for automation of the flotation section of the Zaporozhye Coking Plant including control of the density and average particle size in the feedstock and regulation of addition of reagents in the overall flow is described. A block diagram of the system is included. The use of this automated system along with application of corrections to the reagent system at the flotation section improved the process and made it more economical. The ash content of the flotation wastes increased by 5-8%, the flotation-concentrate output increased by 0.5%, and its ash content was lowered by 0.2-0.4% using the automated system.

Rozenman, E.S.; Bugaisen, I.M.; Deberdeev, I.Kh.; Livshits, A.B.; Nikitina, V.S.; Voitenko, B.I.; Bezlyudnyi, I.F.

1984-01-01

383

A strategy to explore stable and metastable ordered phases of block copolymers.  

PubMed

Block copolymers with their rich phase behavior and ordering transitions have become a paradigm for the study of structured soft materials. A major challenge in the study of the phase behavior of block copolymers is to obtain different stable and metastable phases of the system. A strategy to discover complex ordered phases of block copolymers within the self-consistent field theory framework is developed by a combination of fast algorithms and novel initialization procedures. This strategy allows the generation of a large number of candidate structures, which can then be used to construct phase diagrams. Application of the strategy is illustrated using ABC star triblock copolymers as an example. A large number of candidate structures, including many three-dimensionally ordered phases, of the system are obtained and categorized. A phase diagram is constructed for symmetrically interacting ABC star triblock copolymers. PMID:23551204

Xu, Weiquan; Jiang, Kai; Zhang, Pingwen; Shi, An-Chang

2013-05-01

384

Compare and contrast the reaction coordinate diagrams for chemical reactions and cytoskeletal force generators  

PubMed Central

Reaction coordinate diagrams are used to relate the free energy changes that occur during the progress of chemical processes to the rate and equilibrium constants of the process. Here I briefly review the application of these diagrams to the thermodynamics and kinetics of the generation of force and motion by cytoskeletal motors and polymer ratchets as they mediate intracellular transport, organelle dynamics, cell locomotion, and cell division. To provide a familiar biochemical context for discussing these subcellular force generators, I first review the application of reaction coordinate diagrams to the mechanisms of simple chemical and enzyme-catalyzed reactions. My description of reaction coordinate diagrams of motors and polymer ratchets is simplified relative to the rigorous biophysical treatment found in many of the references that I use and cite, but I hope that the essay provides a valuable qualitative representation of the physical chemical parameters that underlie the generation of force and motility at molecular scales. In any case, I have found that this approach represents a useful interdisciplinary framework for understanding, researching, and teaching the basic molecular mechanisms by which motors contribute to fundamental cell biological processes. PMID:23408787

Scholey, Jonathan M.

2013-01-01

385

A Replacement for Voronoi Diagrams of Near Linear Size  

Microsoft Academic Search

Abstract: For a set P of n points in R^d, we define a new type of space decomposition. The new diagram provides an ε-approximation to the distance function associated with the Voronoi diagram of P, while being of near linear size, for d ≥ 2. This contrasts with the standard Voronoi diagram that has complexity Ω(n^⌈d\\/2⌉) in the worst case.

Sariel Har-peled

2001-01-01

386

Phase diagram of chirally imbalanced QCD matter  

SciTech Connect

We compute the QCD phase diagram in the plane of the chiral chemical potential and temperature using the linear sigma model coupled to quarks and to the Polyakov loop. The chiral chemical potential accounts for effects of imbalanced chirality due to QCD sphaleron transitions which may emerge in heavy-ion collisions. We found three effects caused by the chiral chemical potential: the imbalanced chirality (i) tightens the link between deconfinement and chiral phase transitions; (ii) lowers the common critical temperature; (iii) strengthens the order of the phase transition by converting the crossover into the strong first order phase transition passing via the second order end point. Since the fermionic determinant with the chiral chemical potential has no sign problem, the chirally imbalanced QCD matter can be studied in numerical lattice simulations.

Chernodub, M. N. [CNRS, Laboratoire de Mathematiques et Physique Theorique, Universite Francois-Rabelais Tours, Federation Denis Poisson, Parc de Grandmont, Tours, 37200 (France); Department of Physics and Astronomy, University of Gent, Krijgslaan 281, S9, B-9000 Gent (Belgium); Nedelin, A. S. [Department of Physics and Astronomy, Uppsala University, P. O. Box 803, Uppsala, S-75108 (Sweden); Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, Moscow (Russian Federation)

2011-05-15

387

Energy Level Diagrams for Black Hole Orbits  

E-print Network

A spinning black hole with a much smaller black hole companion forms a fundamental gravitational system, like a colossal classical analog to an atom. In an appealing if imperfect analogy to atomic physics, this gravitational atom can be understood through a discrete spectrum of periodic orbits. Exploiting a correspondence between the set of periodic orbits and the set of rational numbers, we are able to construct periodic tables of orbits and energy level diagrams of the accessible states around black holes. We also present a closed form expression for the rational q, thereby quantifying zoom-whirl behavior in terms of spin, energy, and angular momentum. The black hole atom is not just a theoretical construct, but corresponds to extant astrophysical systems detectable by future gravitational wave observatories.

Janna Levin

2009-07-29

388

Bianchi I meets the Hubble diagram  

E-print Network

We improve existing fits of the Bianchi I metric to the Hubble diagram of supernovae and find an intriguing yet non-significant signal for anisotropy that should be verified or falsified in the near future by the Large Synoptic Survey Telescope. Since the literature contains two different formulas for the apparent luminosity as a function of time of flight in Bianchi I metrics, we present an independent derivation confirming the result by Saunders (1969). The present fit differs from earlier ones by Koivisto & Mota and by Campanelli et al. in that we use Saunders' formula, a larger sample of supernovae, Union 2 and JLA, and we use the general Bianchi I metric with three distinct eigenvalues.

Schucker, Thomas; Valent, Galliano

2014-01-01

389

Thermal phase diagrams of columnar liquid crystals  

E-print Network

In order to understand the possible sequence of transitions from the disordered columnar phase to the helical phase in hexa(hexylthio)triphenylene (HHTT), we study a three-dimensional planar model with octupolar interactions inscribed on a triangular lattice of columns. We obtain thermal phase diagrams using a mean-field approximation and Monte Carlo simulations. These two approaches give similar results, namely, in the quasi one-dimensional regime, as the temperature is lowered, the columns order with a linear polarization, whereas helical phases develop at lower temperatures. The helicity patterns of the helical phases are determined by the exact nature of the frustration in the system, itself related to the octupolar nature of the molecules.

G. Lamoureux; A. Caillé; D. Sénéchal

1998-01-07

390

Bayesian Image Reconstruction Based on Voronoi Diagrams  

E-print Network

We present a Bayesian Voronoi image reconstruction technique (VIR) for interferometric data. Bayesian analysis applied to the inverse problem allows us to derive the a-posteriori probability of a novel parameterization of interferometric images. We use a variable Voronoi diagram as our model in place of the usual fixed pixel grid. A quantization of the intensity field allows us to calculate the likelihood function and a-priori probabilities. The Voronoi image is optimized including the number of polygons as free parameters. We apply our algorithm to deconvolve simulated interferometric data. Residuals, restored images and chi^2 values are used to compare our reconstructions with fixed grid models. VIR has the advantage of modeling the image with few parameters, obtaining a better image from a Bayesian point of view.

G. F. Cabrera; S. Casassus; N. Hitschfeld

2007-12-26

391

Bianchi I meets the Hubble diagram  

NASA Astrophysics Data System (ADS)

We improve existing fits of the Bianchi I metric to the Hubble diagram of supernovae and find an intriguing yet non-significant signal for anisotropy that should be verified or falsified in the near future by the Large Synoptic Survey Telescope. Since the literature contains two different formulas for the apparent luminosity as a function of time of flight in Bianchi I metrics, we present an independent derivation confirming the result by Saunders. The present fit differs from earlier ones by Koivisto & Mota and by Campanelli et al. in that we use Saunders' formula, a larger sample of supernovae, Union 2 and Joint Light curve Analysis, and we use the general Bianchi I metric with three distinct eigenvalues.

Schücker, Thomas; Tilquin, André; Valent, Galliano

2014-11-01

392

Local Anesthesia and Nerve Blocks  

Microsoft Academic Search

\\u000a Many inguino-scrotal procedures in urology can be performed under local anesthesia. Sometimes local anesthetics are used to\\u000a supplement post-operative pain relief in patients who had general anesthesia. The common nerve blocks are an inguinal block\\u000a for hernia repairs and inguinal orchidectomies, a cord block for vasectomies, and a penile block for circumcision and frenuloplasty.\\u000a The testis and scrotum are innervated

Hashim Hashim

393

55. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...  

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

55. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ONE COMPLETE CYCLE - Kennecott Copper Corporation, On Copper River & Northwestern Railroad, Kennicott, Valdez-Cordova Census Area, AK

394

54. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...  

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

54. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ONE COMPLETE CYCLE - Kennecott Copper Corporation, On Copper River & Northwestern Railroad, Kennicott, Valdez-Cordova Census Area, AK

395

53. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ...  

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

53. PHOTOCOPY OF DRAWING AMMONIA LEACHING PLANT FLOW DIAGRAM, REPRESENTING ONE COMPLETE CYCLE - Kennecott Copper Corporation, On Copper River & Northwestern Railroad, Kennicott, Valdez-Cordova Census Area, AK

396

NIPER Lab WARDEN -- Descriptive panels and diagrams for NIPER Lab WARDEN software. Volume 2  

SciTech Connect

This report is the second volume of a two-volume series on the NIPER Lab WARDEN computer program, a modular laboratory or pilot plant automation software designed for data acquisition/control/analysis/presentation. Volume 1 of the series is the User Manual that serves all users, whereas this volume is the Reference Manual intended for advanced users examining the structure or modifying the program. Volume 1 contains a brief introduction of LabVIEW and object-oriented programming, various features of the NIPER Lab WARDEN program, instructions on how to use these features, and several example problems and their step-by-step solutions. This volume (Volume 2) contains the complete program code needed to reproduce or modify the program. It includes the position in hierarchy, the connector pane, the front panel, and the block diagram for each of the virtual instruments (VI) in NIPER Lab WARDEN. The panels and block diagrams contained herein are generated from the computer program described in Volume 1 but are arranged to show and explain the structure and interrelationship between various elements of the program.

Mahmood, S.M.; Olsen, D.K.

1994-04-01

397

Snell's Law with Large Blocks  

Microsoft Academic Search

The introductory physics lab curriculum usually has one experiment devoted to the study of the refraction of light. The most obvious way to study the refraction of light is to lay a transparent block down on the lab bench and aim a laser beam horizontally at the block so that it refracts twice-inward upon entering the block and outward upon

John J. Lynch

2007-01-01

398

Lazy Decoding for Block Fading Channels  

Microsoft Academic Search

This paper deals with decoding latency and power consumption reduction techniques, with a special focus on packet transmission over non-ergodic block fading channels. Based on information theory, we propose a decoder activation criterion that forecasts unsuccessful decoding attempts before activating the decoding process. This solution permits to avoid useless decoder activations and consequent inefficient decoder computations. Simulation results show that

Emilio Calvanese Strinati

2009-01-01

399

"Building Blocks" for Early Childhood Mathematics  

ERIC Educational Resources Information Center

Building Blocks is a National Science Foundation-funded project designed to enable all young children to build a solid foundation for mathematics. To ensure this, we used a design and development model that drew from theory and research in each phase. Our design process is based on the assumption that curriculum and software design can and should…

Sarama, Julie; Clements, Douglas H.

2004-01-01

400

BLOCK CAPITALS ONLY A Partnership for Learning  

E-print Network

styles and wherever possible use multiple educational modalities (problem based learning, e-learningBLOCK CAPITALS ONLY Last Name First Name CID Number A Partnership for Learning The Imperial College understanding that learning is a lifelong process and a key aim of the Imperial College London course

401

Phase Equilibria in a Water-block Copolymer System  

Microsoft Academic Search

Mixtures containing water and a PEO–PPO–PEO block copolymer, i.e. apolyoxyethylene–polyoxypropylene–polyoxyethylene glycol,\\u000a have been investigated and the phase boundaries determined.\\u000a \\u000a The phase diagram shows similarities with non-ionic surfactant systems of the n-alkyl-polyoxyethylene glycol family, with occurrence of different lyotropic liquid crystalline phases and of upper consolute\\u000a boundaries.\\u000a \\u000a \\u000a \\u000a Added sodium salts have a pronounced effect on the critical solution boundaries, which can

C. La Mesa

2000-01-01

402

Concept and development of information flow diagram for literature survey  

SciTech Connect

The Information Flow Diagram for Literature Survey (IFDLS) has been developed to manage information and procedure in the literature survey phase of the PTAs selection process. It is a tool utilizing information technology, which can organize, analyze, and evaluate information from literature survey and manage their process systematically. IFDLS is able to show the flow of information and data, and the history of information management processing. Information coverage and quality is not homogenous throughout the country and, in some areas, there may not even be sufficient data available to be able to reach a judgment on conformity with the site-specific evaluation factors (SSEF). Literature surveys could only be conducted on a volunteer area before it is nominated as a PIA. However, the absence of information on any factor mentioned will not constitute disqualification of the area. On the contrary, an attempt to compare these sites with analogous areas in Japan will be done to assemble sufficient data and consequently make a decision on whether to proceed further. The application of IFDLS to literature survey phase of the PIA selection process is being proposed. The concept, construction, application and evolution of IFDLS towards application phase on a trial basis are discussed. (authors)

Noda, Masaru; Sato, Shoko; Ueda, Tadashi [Civil Engineering, Technology Division, Obayashi Corporation, Tokyo (Japan); Tsuchi, Hiroyuki; Koike, Akihisa [Nuclear Waste Management Organization of Japan, Tokyo (Japan)

2007-07-01

403

Building Blocks for Youth  

NSDL National Science Digital Library

"Building Blocks for Youth is an alliance of children's advocates, researchers, law enforcement professionals and community organizers that seeks to protect minority youth in the justice system and promote rational and effective justice policies." The organization's Website provides reports, data, and news releases concerning the issue of the treatment of minorities in the American criminal justice system. Issued this month, their latest report Off Balance: Youth Race and Crime in the News examines the media treatment of crime victims and perpetrators who are people of color. Building Blocks also offers three previous reports that analyze data concerning the discrepancies between sentencing for black and white juveniles accused of similar crimes, both nationally and specifically in California, and data on the growing practice of charging juveniles as adults. The site also features a number of fact sheets on related issues, a newsroom featuring press releases and links to related articles in the online press, and a monthly newsletter presenting the latest fact sheet. The reports are offered in HTML as well as .pdf formats for easy downloading.

404

Energetics of Shaker K channels block by inactivation peptides  

Microsoft Academic Search

A synthetic peptide of the NH2-terminal inactivation domain of the ShB channel blocks Shaker channels which have an NH2-terminal deletion and mimics many of the characteristics of the intramolecular inactivation reaction. To investigate the role of electrostatic interactions in both peptide block and the inactivation process we measured the kinetics of block of macroscopic currents recorded from the intact ShB

RUTH D. MURRELL-LAGNADO; RICHARD W. ALDRICH

1993-01-01

405

Nanoparticles in the environment: assessment using the causal diagram approach  

PubMed Central

Nanoparticles (NPs) cause concern for health and safety as their impact on the environment and humans is not known. Relatively few studies have investigated the toxicological and environmental effects of exposure to naturally occurring NPs (NNPs) and man-made or engineered NPs (ENPs) that are known to have a wide variety of effects once taken up into an organism. A review of recent knowledge (between 2000-2010) on NP sources, and their behaviour, exposure and effects on the environment and humans was performed. An integrated approach was used to comprise available scientific information within an interdisciplinary logical framework, to identify knowledge gaps and to describe environment and health linkages for NNPs and ENPs. The causal diagram has been developed as a method to handle the complexity of issues on NP safety, from their exposure to the effects on the environment and health. It gives an overview of available scientific information starting with common sources of NPs and their interactions with various environmental processes that may pose threats to both human health and the environment. Effects of NNPs on dust cloud formation and decrease in sunlight intensity were found to be important environmental changes with direct and indirect implication in various human health problems. NNPs and ENPs exposure and their accumulation in biological matrices such as microbiota, plants and humans may result in various adverse effects. The impact of some NPs on human health by ROS generation was found to be one of the major causes to develop various diseases. A proposed cause-effects diagram for NPs is designed considering both NNPs and ENPs. It represents a valuable information package and user-friendly tool for various stakeholders including students, researchers and policy makers, to better understand and communicate on issues related to NPs. PMID:22759495

2012-01-01

406

Block copolymer investigations  

NASA Astrophysics Data System (ADS)

The research presented in this thesis deals with various aspects of block copolymers on the nanoscale: their behavior at a range of temperatures, their use as scaffolds, or for creation of chemically striped surfaces, as well as the behavior of metals on block copolymers under the influence of UV light, and the healing behavior of copolymers. Invented around the time of World War II, copolymers have been used for decades due to their macroscopic properties, such as their ability to be molded without vulcanization, and the fact that, unlike rubber, they can be recycled. In recent years, block copolymers (BCPs) have been used for lithography, as scaffolds for nano-objects, to create a magnetic hard drive, as well as in photonic and other applications. In this work we used primarily atomic force microscopy (AFM) and transmission electron microscopy (TEM), described in Chapter II, to conduct our studies. In Chapter III we demonstrate a new and general method for positioning nanoparticles within nanoscale grooves. This technique is suitable for nanodots, nanocrystals, as well as DNA. We use AFM and TEM to demonstrate selective decoration. In Chapters IV and V we use AFM and TEM to study the structure of polymer surfaces coated with metals and self-assembled monolayers. We describe how the surfaces were created, exhibit their structure on the nanoscale, and prove that their macroscopic wetting properties have been altered compared to the original polymer structures. Finally, Chapters VI and VII report out in-situ AFM studies of BCP at high temperatures, made possible only recently with the invention of air-tight high-temperature AFM imaging cells. We locate the transition between disordered films and cylinders during initial ordering. Fluctuations of existing domains leading to domain coarsening are also described, and are shown to be consistent with reptation and curvature minimization. Chapter VII deals with the healing of PS-b-PMMA following AFM-tip lithography or catastrophic damage. Although the polymer does not assume the same exact topography as before lithography or damage, the fingerprint patterns are shown to reform.

Yufa, Nataliya A.

407

Radiation Blocking Lenses  

NASA Technical Reports Server (NTRS)

The Biomedical Optical Company of America's Eagle 475 lens absorbs 100 percent of all photowavelengths considered hazardous to eye tissue, including ultraviolet and blue light, which are considered contributors to cataract and age-related macular degeneration. The lens absorbs hazardous wavelengths, but allows a higher percentage of visually useful areas of the spectrum to pass through. Polarization blocks out irritating glint and glare and heightens visual acuity. The Eagle 475 sunglasses are the latest in a series of spinoffs that originated at the Jet Propulsion Laboratory where two scientists developed a protective, welding curtain that filtered out harmful irradiance. The result was a commercial curtain that absorbs filters and scatters light, providing protection for personnel in welding areas. Further research focused on protective industrial glasses and later on consumer products.

1993-01-01

408

Electric field phase diagram of thiourea determined by optical birefringence  

E-print Network

L-123 Electric field phase diagram of thiourea determined by optical birefringence J. P. Jamet de pre- mier ordre. Abstract. 2014 The phase diagram of thiourea : SC(ND2)2 in the (E, T) plane has, Classification Physics Abstracts 77.80B 1. Introduction. - Thiourea (SC(ND2)2) has been the subject of many

Paris-Sud XI, Université de

409

Segmentation of Page Images Using the Area Voronoi Diagram  

Microsoft Academic Search

This paper presents a method of page segmentation based on the approximated area Voronoi diagram. The characteristics of the proposed method are as follows: (1) The Voronoi diagram enables us to obtain the candidates of boundaries of document components from page images with non-Manhattan layout and a skew. (2) The candidates are utilized to estimate the intercharacter and interline gaps

Koichi Kise; Akinori Sato; Motoi Iwata

1998-01-01

410

Voronoi diagrams of set-theoretic solid models  

Microsoft Academic Search

The definition of a Voronoi diagram is extended to arbitrary set-theoretic solid models. A method for approximating such diagrams using recursive subdivision is described. The method relies on octrees, which have been used for computing the distances between whole solid models. Two- and three-dimensional images generated using the algorithm are presented

David Lavender; A. Bowyer; J. Davenport; A. Wallis; J. Woodwark

1992-01-01

411

The Pathway Tools cellular overview diagram and Omics Viewer  

Microsoft Academic Search

The Pathway Tools cellular overview diagram is a visual representation of the biochemical network of an organism. The overview is automatically created from a Pathway\\/Genome Database descri- bing that organism. The cellular overview includes metabolic, transport and signaling pathways, and other membrane and periplasmic proteins. Pathway Tools supports interrogation and exploration of cellular biochemical networks through the overview diagram. Furthermore,

Suzanne M. Paley; Peter D. Karp

2006-01-01

412

Water, Water, Everywhere: Phase Diagrams of Ordinary Water Substance  

Microsoft Academic Search

A three-dimensional phase diagram for ordinary water substance, with its solid, liquid, and vapor phases, based on fitted authentic experimental data is presented. Such an authentic diagram appears not to have been presented for water before, and may improve the understanding of its phase relationships. The nature of the IAPWS-95 equations, fitted to data, is discussed.

L. Glasser

2004-01-01

413

Adding Value to Force Diagrams: Representing Relative Force Magnitudes  

ERIC Educational Resources Information Center

Nearly all physics instructors recognize the instructional value of force diagrams, and this journal has published several collections of exercises to improve student skill in this area. Yet some instructors worry that too few students perceive the conceptual and problem-solving utility of force diagrams, and over recent years a rich variety of…

Wendel, Paul

2011-01-01

414

49 CFR Appendix B to Part 230 - Diagrams and Drawings  

Code of Federal Regulations, 2010 CFR

... 4 2010-10-01 2010-10-01 false Diagrams and Drawings B Appendix B to Part 230 Transportation Other Regulations... Pt. 230, App. B Appendix B to Part 230—Diagrams and Drawings ER17No99.015 ER17No99.016 ER17No99.017...

2010-10-01

415

Diversions: Spatial Thinking Tasks--Cube Diagrams and Drawings  

ERIC Educational Resources Information Center

This article illustrates spatial thinking tasks through cube diagrams and drawings. The author talks about the pentacube diagram that is based on the principle that a vertical cube-edge is shown "vertically". The author describes how to extend isometric drawing to include triangular wedges that are made by slicing single cubes, bi-cubes,…

Gough, John

2009-01-01

416

Discrete-time random walks on diagrams (graphs) with cycles.  

PubMed

After a review of the diagram method for continuous-time random walks on graphs with cycles, the method is extended to discrete-time random walks. The basic theorems carry over formally from continuous time to discrete time. Three problems in tennis probabilities are used to illustrate random walks on discrete-time diagrams with cycles. PMID:3041408

Hill, T L

1988-08-01

417

CD2Alloy: Class Diagrams Analysis Using Alloy Revisited  

E-print Network

CD2Alloy: Class Diagrams Analysis Using Alloy Revisited Shahar Maoz , Jan Oliver Ringert present CD2Alloy, a novel, powerful translation of UML class diagrams (CDs) to Alloy. Unlike existingAlloy uses a deeper embedding strategy. Rather than mapping each CD construct to a semantically

Maoz, Shahar

418

Phase Diagram and Scattering Intensity of Binary Amphiphilic Systems  

E-print Network

Phase Diagram and Scattering Intensity of Binary Amphiphilic Systems G. Gompper and Ulrich S parameter, which describe the con- centration and orientation of the amphiphile, respectively, is used to study the phase diagram and the scattering intensity of binary amphiphilic systems. With increasing

Schwarz, Ulrich

419

Diagrams in Mathematics: To Draw or Not to Draw?  

ERIC Educational Resources Information Center

This paper describes the use of diagrams as self-explanatory tools. It considers the use of diagrams, in general, and more specifically, examines research that is currently being undertaken in the broad field of visualisation. The research participants referred to in this article were Advanced Certificate of Education students and the paper…

Mudaly, Vimolan

2012-01-01

420

The Equivalence of Reliability Diagrams and Fault-Tree Analysis  

Microsoft Academic Search

Many practicing engineers model their systems using reliability diagrams, while others use fault-tree analysis. The theoretical equivalence of the two techniques is described. System reliability can be expressed in two ways: probability of success and probability of failure approach, in terms of the tie-sets (forward paths) of a reliability diagram. Similarly, one can write two other expressions in terms of

Martin L. Shooman

1970-01-01

421

The Effect of Causal Diagrams on Text Learning  

ERIC Educational Resources Information Center

We examined the effect of studying a causal diagram on comprehension of causal relationships from an expository science text. A causal diagram is a type of visual display that explicitly represents cause-effect relationships. In Experiment 1, readers between conditions did not differ with respect to memory for main ideas, but the readers who…

McCrudden, Matthew T.; Schraw, Gregory; Lehman, Stephen; Poliquin, Anne

2007-01-01

422

Authoring Diagram-Based CBA with CourseMarker  

ERIC Educational Resources Information Center

The CourseMarker system has been used to assess free-response computer based assessment (CBA) exercises since 1998. The aim of the studies reported here was to evaluate the feasibility and usefulness of developing and deploying diagram-based exercises using DATsys, an authoring environment for diagram-based CBA, together with CourseMarker.…

Higgins, Colin A.; Bligh, Brett; Symeonidis, Pavlos; Tsintsifas, Athanasios

2009-01-01

423

Heuristic Diagrams as a Tool to Teach History of Science  

Microsoft Academic Search

The graphic organizer called here heuristic diagram as an improvement of Gowin's Vee heuristic is proposed as a tool to teach history of science. Heuristic diagrams have the purpose of helping students (or teachers, or researchers) to understand their own research considering that asks and problem-solving are central to scientific activity. The left side originally related in Gowin's Vee with

José A. Chamizo

2011-01-01

424

Using a Spreadsheet To Explore Melting, Dissolving and Phase Diagrams.  

ERIC Educational Resources Information Center

Compares phase diagrams relating to the solubilities and melting points of various substances in textbooks with those generated by a spreadsheet using data from the literature. Argues that differences between the diagrams give rise to new chemical insights. (Author/MM)

Goodwin, Alan

2002-01-01

425

DYNAMIC BIFURCATION DIAGRAMS FOR SOME MODELS IN ECONOMICS AND BIOLOGY  

Microsoft Academic Search

A method to determine the static bifurcation diagram (sbd) and dynamical bifurcation diagram (dbd) is proposed and the results for a few concrete problems are shown. 1. Historical premises For a long time, we were working in hydrodynamic stability theory (hsth) (1), just the period during which this field was quickly moving from an analytical towards a geometric and topological

Adelina Georgescu

426

Diagram This Headline in One Minute, if You Can  

ERIC Educational Resources Information Center

Say "sentence diagramming" to people of a certain age, and one gets different reactions. Say it to most college students, and one gets a blank look. But not from the 24 students in Lucy Ferriss's "Constructing Thought," a half-credit course in the English department at Trinity College. They know how to diagram a sentence--and they are passionate…

Landecker, Heidi

2009-01-01

427

Particle-hole ring diagrams for fermions in two dimensions  

NASA Astrophysics Data System (ADS)

The set of particle-hole ring diagrams for a many-fermion system in two dimensions is studied. The complex-valued polarization function is derived in detail and shown to be expressible in terms of square-root functions. For a contact-interaction the perturbative contributions to the energy per particle ?(kf) are calculated in a closed analytical form from third up to twelfth order. The resummation of the particle-hole ring diagrams to all orders is studied and a pronounced dependence on the dimensionless coupling parameter ? is found. There is a substantial difference between the complete ring-sum with all exchange-type diagrams included and the standard resummation of the leading n-ring diagrams only. The spin factor Sn(g) associated to the nth order ring diagrams is derived for arbitrary spin-degeneracy g.

Kaiser, N.

2014-11-01

428

ANN queries: covering Voronoi diagram with hyperboxes  

E-print Network

Given a set $S$ of $n$ points in $d$-dimensional Euclidean metric space $X$ and a small positive real number $\\epsilon$, we present an algorithm to preprocess $S$ and answer queries that require finding a set $S' \\subseteq S$ of $\\epsilon$-approximate nearest neighbors (ANNs) to a given query point $q \\in X$. The following are the characteristics of points belonging to set $S'$: - $\\forall s \\in S'$, $\\exists$ a point $p \\in X$ such that $|pq| \\le \\epsilon$ and the nearest neighbor of $p$ is $s$, and - $\\exists$ a $s' \\in S'$ such that $s'$ is a nearest neighbor of $q$. During the preprocessing phase, from the Voronoi diagram of $S$ we construct a set of box trees of size $O(4^d\\frac{V}{\\delta}(\\frac{\\pi}{\\epsilon})^{d-1})$ which facilitate in querying ANNs of any input query point in $O(\\frac{1}{d}lg \\frac{V}{\\delta} + (\\frac{\\pi}{\\epsilon})^{d-1})$ time. Here $\\delta$ equals to $(\\frac{\\epsilon}{2\\sqrt{d}})^d$, and $V$ is the volume of a large bounding box that contains all the points of set $S$. The averag...

Inkulu, Rajasekhar

2011-01-01

429

Diagram of Cell to Cell Communication  

NASA Technical Reports Server (NTRS)

Diagram depicts the importance of cell-cell communication as central to the understanding of cancer growth and progression, the focus of the NASA bioreactor demonstration system (BDS-05) investigation. Microgravity studies will allow us to unravel the signaling and communication between these cells with the host and potential development of therapies for the treatment of cancer metastasis. The NASA Bioreactor provides a low turbulence culture environment which promotes the formation of large, three-dimensional cell clusters. Due to their high level of cellular organization and specialization, samples constructed in the bioreactor more closely resemble the original tumor or tissue found in the body. The Bioreactor is rotated to provide gentle mixing of fresh and spent nutrient without inducing shear forces that would damage the cells. The work is sponsored by NASA's Office of Biological and Physical Research. The bioreactor is managed by the Biotechnology Cell Science Program at NASA's Johnson Space Center (JSC). NASA-sponsored bioreactor research has been instrumental in helping scientists to better understand normal and cancerous tissue development. In cooperation with the medical community, the bioreactor design is being used to prepare better models of human colon, prostate, breast and ovarian tumors. Cartilage, bone marrow, heart muscle, skeletal muscle, pancreatic islet cells, liver and kidney are just a few of the normal tissues being cultured in rotating bioreactors by investigators. Credit: Emory University.

2002-01-01

430

Microstructure and phase diagrams of polymer gels  

NASA Astrophysics Data System (ADS)

Recently we developed [Panyukov and Rabin, Macromolecules 29 (1996) 7960] a phenomenological theory of randomly cross-linked polymer networks, based on the separation of solid-like and liquid-like degrees of freedom and taking into account the frozen inhomogeneity of network structure. We calculated the scattering spectra of weakly charged, randomly cross-linked polymer gels in good, poor and in ? solvents [Panyukov and Rabin, Macromolecules 29 (1996) 8530; Rabin and Panyukov, Macromolecules 30 (1996) 301]. For some values of the thermodynamic parameters, the competition between poor solubility, electrostatics and network elasticity leads to the divergence of the structure factor at a wave vector q ?, signaling the onset of microphase separation in the gel. Depending on the choice of thermodynamic parameters, the characteristic wavelength 1/q ? varies from microscopic to macroscopic length scales. We have shown that the presence of long range elastic interactions in the network affects the phase diagrams of polymer gels in poor solvent. Weakly charged gels deswell continuously upon decreasing the quality of solvent. At intermediate degrees of ionization the gel undergoes a first order volume transition between two homogeneous states, which takes place at the spinodal. Strong hysteresis is predicted for the swelling and the deswelling transitions in this regime. Further increase of the charge on the gel leads to the formation of an anisotropically deformed phase on the surface of the isotropic bulk phase.

Panyukov, Sergei; Rabin, Yitzhak

431

Morphological Transitions in Block Copolymers.  

NASA Astrophysics Data System (ADS)

This thesis presents detailed studies of previously unobserved thermoreversible phase transitions between different microphase-separated morphologies in block copolymer melts. First, we describe the transformation from the lamellar to the cylindrical morphology in a commercially available poly(styrene) -poly(ethene-co-butene) diblock. Using a self-consistent combination of small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM), we identify the considerations which drive each step of the process and describe the intermediate states which form as the transformation progresses. Although we demonstrate the thermoreversibility of the transition, the mechanism by which the reverse transformation occurs remains unknown. Second, we present a thermoreversible transformation from the lamellar morphology to a previously undiscovered bicontinuous cubic phase of Ia3d space group symmetry (entitled the gyroid^*) in a poly(styrene) -poly(isoprene) diblock. We develop the characteristics of this new phase through a self-consistent combination of SAXS, TEM and computer modeling and evaluate aspects of its stability by examining blends of the gyroid ^*-forming material with homopolymers of low molecular weight. We compare these characteristics with those of the ordered bicontinuous double diamond (OBDD) morphology and show that differentiation of the two structures via TEM will be difficult. In addition, we present a re -evaluation of materials previously identified as possessing the OBDD morphology which suggests that most of the literature on bicontinuous phases in block copolymers is probably incorrect. This discovery has significant implications for theories of microphase formation and stability in these materials. Third, we report some preliminary observations on high pressure effects in block copolymers, an area of study which has received surprisingly little examination. SAXS measurements indicate that pressures of up to 600 bar increase the order-disorder transition temperature of poly(styrene) -poly(isoprene) diblocks without causing significant changes in either the segregation product (chiN) or the radius of gyration of the entire molecule. Finally, after discussing the limitations of these measurements, we present an outline for a detailed investigation of pressure effects in polymer materials.

Hajduk, Damian Andrew

432

Blocking contacts for N-type cadmium zinc telluride  

NASA Technical Reports Server (NTRS)

A process for applying blocking contacts on an n-type CdZnTe specimen includes cleaning the CdZnTe specimen; etching the CdZnTe specimen; chemically surface treating the CdZnTe specimen; and depositing blocking metal on at least one of a cathode surface and an anode surface of the CdZnTe specimen.

Stahle, Carl M. (Inventor); Parker, Bradford H. (Inventor); Babu, Sachidananda R. (Inventor)

2012-01-01

433

A Non-Blocking Parallel Spatial Join Algorithm  

Microsoft Academic Search

Interest in incremental and adaptive query processing has led to the investigation of equijoin evaluation algorithms that are non-blocking. This investigation has yielded a number of algorithms, including the symmetric hash join, the XJoin, the Ripple Join, and their variants. However, to our knowledge no one has proposed a non- blocking spatial join algorithm. In this paper, we propose a

Gang Luo; Jeffrey F. Naughton; Curt J. Ellmann

2002-01-01

434

MAS5051 Probability and Probability Distributions Contents of Blocks  

E-print Network

transformations 38: The Poisson Process T 39/40 39: Introduction to Markov Chains 40: Basic Bayesian inference MASMAS5051 Probability and Probability Distributions Contents of Blocks Block "Lectures" Topics A 1/2 1: Sample spaces and events 2: Defining probabilities B 3/4 3: Conditional probability 4

Jordan, Jonathan

435

Effects of Three Diagram Instruction Methods on Transfer of Diagram Comprehension Skills: The Critical Role of Inference While Learning  

ERIC Educational Resources Information Center

Can students be taught to better comprehend the diagrams in their textbooks? Can such teaching transfer to uninstructed diagrams in the same domain or even in a new domain? What methods work best for these goals? Building on previous research showing positive results compared to control groups in both laboratory studies and short-term…

Cromley, Jennifer G.; Bergey, Bradley W.; Fitzhugh, Shannon; Newcombe, Nora; Wills, Theodore W.; Shipley, Thomas F.; Tanaka, Jacqueline C.

2013-01-01

436

To block or not to block: European approaches to content regulation, and implications for freedom of expression  

Microsoft Academic Search

Based on the limited effectiveness of state laws, and lack of harmonization at international level a number of states started to introduce policies to block access to Internet content and websites deemed illegal which are situated outside their legal jurisdiction. However, blocking policies are not always subject to due process principles, decisions are not necessarily taken by the courts of

Yaman Akdeniz

2010-01-01

437

Magnetic phase diagram of F2PNNNO  

NASA Astrophysics Data System (ADS)

2-[2',6',-difluoro-4'-(N-tert-butyl-N-oxyamino)phenyl]-4,4,5,5-tetramethyl-4,5- dihydro-1H-imidazol-1-oxyl 3-oxide, F2PNNNO for short, is an organic molecule containing two unpaired electrons. Residing in the N-tert-butyl nitroxide and nitronyl nitroxide groups, the two S=1/2 spins of these electrons are ferromagnetically coupled with an exchange constant of 407 K. In a crystal, two neighboring F2PNNNO molecules form a pair in which the nitronyl-nitroxide spins are coupled antiferromagnetically with an exchange constant of 67 K. The magnetism of F2PNNNO is that of the spin tetramers of these molecular pairs, which in turn are antiferromagnetically coupled with an exchange constant of 7.4 K [1]. Specific-heat and magnetocaloric-effect measurements reveal a highly symmetric boundary of the ordered phase in the phase diagram, with a lower critical field of Hc1=9.46 T and an upper critical field of Hc2=15.37 T. The ordering temperature Tc obeys a power law Tc ˜(H-Hc1)^? near Hc1, with the exponent ? approaching 2/3 in the low-temperature limit, indicative of a Bose-Einstein condensation (BEC) of |S, Sz>=|1,1> tetramers. Near the upper critical field Hc2, where one expects a BEC of singlet |0,0> tetramers in the ``vacuum'' comprising |1,1> tetramers, the corresponding power-law exponent remains around 0.4. Remarkably, the temperature dependence of the specific heat indicates that the magnon dispersion is independent of magnetic field between the two critical fields. This work is in collaboration with H. Tsujii, B. Andraka, Y. Hosokoshi, and K. Inoue. [1] Y. Hosokoshi et al., Phys. Rev. B 60, 12924 (1999).

Takano, Yasu

2007-03-01

438

Energetic Studies and Phase Diagram of Thioxanthene  

NASA Astrophysics Data System (ADS)

The molecular stability of thioxanthene, a key species from which very important compounds with industrial relevance are derived, has been studied by a combination of several experimental techniques and computational approaches. The standard (p° = 0.1 MPa) molar enthalpy of formation of crystalline thioxanthene (117.4 ± 4.1 kJ·mol-1) was determined from the experimental standard molar energy of combustion, in oxygen, measured by rotating-bomb combustion calorimetry at T = 298.15 K. The enthalpy of sublimation was determined by a direct method, using the vacuum drop microcalorimetric technique, and also by an indirect method, using a static apparatus, where the vapor pressures at different temperatures were measured. The latter technique was used for both crystalline and undercooled liquid samples, and the phase diagram of thioxanthene near the triple point was obtained (triple point coordinates T = 402.71 K and p = 144.7 Pa). From the two methods, a mean value for the standard (p° = 0.1 MPa) molar enthalpy of sublimation, at T = 298.15 K (101.3 ± 0.8 kJ·mol-1), was derived. From the latter value and from the enthalpy of formation of the solid, the standard (p° = 0.1 MPa) enthalpy of formation of gaseous thioxanthene was calculated as 218.7 ± 4.2 kJ·mol-1. Standard ab initio molecular orbital calculations were performed using the G3(MP2)//B3LYP composite procedure and several homodesmotic reactions in order to derive the standard molar enthalpy of formation of thioxanthene. The ab initio results are in excellent agreement with the experimental data.

Freitas, Vera L. S.; Monte, Manuel J. S.; Santos, Luís M. N. B. F.; Gomes, José R. B.; Ribeiro da Silva, Maria D. M. C.

2009-10-01

439

The high-z quasar Hubble Diagram  

NASA Astrophysics Data System (ADS)

Two recent discoveries have made it possible for us to begin using high-z quasars as standard candles to construct a Hubble Diagram (HD) at z > 6. These are (1) the recognition from reverberation mapping that a relationship exists between the optical/UV luminosity and the distance of line-emitting gas from the central ionizing source. Thus, together with a measurement of the velocity of the line-emitting gas, e.g., via the width of BLR lines, such as Mg II, a single observation can therefore in principle provide a determination of the black hole's mass; and (2) the identification of quasar ULAS J1120+0641 at z = 7.085, which has significantly extended the redshift range of these sources, providing essential leverage when fitting theoretical luminosity distances to the data. In this paper, we use the observed fluxes and Mg II line-widths of these sources to show that one may reasonably test the predicted high-z distance versus redshift relationship, and we assemble a sample of 20 currently available high-z quasars for this exercise. We find a good match between theory and observations, suggesting that a more complete, high-quality survey may indeed eventually produce an HD to complement the highly-detailed study already underway (e.g., with Type Ia SNe, GRBs, and cosmic chronometers) at lower redshifts. With the modest sample we have here, we show that the Rh = ct Universe and ?CDM both fit the data quite well, though the smaller number of free parameters in the former produces a more favorable outcome when we calculate likelihoods using the Akaike, Kullback, and Bayes Information Criteria. These three statistical tools result in similar probabilities, indicating that the Rh = ct Universe is more likely than ?CDM to be correct, by a ratio of about 85% to 15%.

Melia, Fulvio

2014-01-01

440

The High-z Quasar Hubble Diagram  

E-print Network

Two recent discoveries have made it possible for us to begin using high-z quasars as standard candles to construct a Hubble Diagram (HD) at z > 6. These are (1) the recognition from reverberation mapping that a relationship exists between the optical/UV luminosity and the distance of line-emitting gas from the central ionizing source. Thus, together with a measurement of the velocity of the line-emitting gas, e.g., via the width of BLR lines, such as Mg II, a single observation can therefore in principle provide a determination of the black hole's mass; and (2) the identification of quasar ULAS J1120+0641 at z = 7.085, which has significantly extended the redshift range of these sources, providing essential leverage when fitting theoretical luminosity distances to the data. In this paper, we use the observed fluxes and Mg II line-widths of these sources to show that one may reasonably test the predicted high-z distance versus redshift relationship, and we assemble a sample of 20 currently available high-z quasars for this exercise. We find a good match between theory and observations, suggesting that a more complete, high-quality survey may indeed eventually produce an HD to complement the highly-detailed study already underway (e.g., with Type Ia SNe, GRBs, and cosmic chronometers) at lower redshifts. With the modest sample we have here, we show that the R_h=ct Universe and LCDM both fit the data quite well, though the smaller number of free parameters in the former produces a more favorable outcome when we calculate likelihoods using the Akaike, Kullback, and Bayes Information Criteria. These three statistical tools result in similar probabilities, indicating that the R_h=ct Universe is more likely than LCDM to be correct, by a ratio of about 85% to 15%.

Fulvio Melia

2013-12-20

441

31 CFR 593.204 - Expenses of maintaining blocked physical property; liquidation of blocked account.  

...Expenses of maintaining blocked physical property; liquidation of blocked account...Expenses of maintaining blocked physical property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

442

31 CFR 549.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

443

31 CFR 593.204 - Expenses of maintaining blocked physical property; liquidation of blocked account.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked account...Expenses of maintaining blocked physical property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

444

31 CFR 545.207 - Expenses of maintaining blocked property; liquidation of blocked account.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked property; liquidation of blocked account...Expenses of maintaining blocked property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

445

31 CFR 593.204 - Expenses of maintaining blocked physical property; liquidation of blocked account.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked account...Expenses of maintaining blocked physical property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

446

31 CFR 537.209 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

447

31 CFR 537.209 - Expenses of maintaining blocked property; liquidation of blocked account.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked property; liquidation of blocked account...Expenses of maintaining blocked property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

448

31 CFR 546.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

449

31 CFR 547.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

450

31 CFR 537.209 - Expenses of maintaining blocked property; liquidation of blocked account.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked property; liquidation of blocked account...Expenses of maintaining blocked property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

451

31 CFR 543.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

452

31 CFR 543.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

453

31 CFR 576.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

454

31 CFR 576.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

455

31 CFR 588.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

456

31 CFR 544.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

457

31 CFR 546.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

458

31 CFR 544.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

459

31 CFR 548.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

460

31 CFR 549.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

461

31 CFR 544.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

462

31 CFR 546.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

463

31 CFR 543.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

464

31 CFR 537.209 - Expenses of maintaining blocked property; liquidation of blocked account.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked property; liquidation of blocked account...Expenses of maintaining blocked property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

465

31 CFR 544.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

466

31 CFR 543.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

467

31 CFR 547.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

468

31 CFR 560.214 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

469

31 CFR 560.214 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

470

31 CFR 543.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

471

31 CFR 546.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

472

31 CFR 548.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

473

31 CFR 549.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

474

31 CFR 546.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

475

31 CFR 547.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

476

31 CFR 576.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

477

31 CFR 587.205 - Expenses of maintaining blocked property; liquidation of blocked account.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked property; liquidation of blocked account...Expenses of maintaining blocked property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

478

31 CFR 588.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

479

31 CFR 588.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

480

31 CFR 542.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

481

31 CFR 548.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

482

31 CFR 548.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

483

31 CFR 576.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2011 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2011-07-01

484

31 CFR 537.209 - Expenses of maintaining blocked property; liquidation of blocked account.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked property; liquidation of blocked account...Expenses of maintaining blocked property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

485

31 CFR 588.205 - Expenses of maintaining blocked property; liquidation of blocked account.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked property; liquidation of blocked account...Expenses of maintaining blocked property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

486

31 CFR 547.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

487

31 CFR 548.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2010 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2010-07-01

488

31 CFR 547.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

489

31 CFR 593.204 - Expenses of maintaining blocked physical property; liquidation of blocked account.  

Code of Federal Regulations, 2012 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked account...Expenses of maintaining blocked physical property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2012-07-01

490

31 CFR 541.205 - Expenses of maintaining blocked property; liquidation of blocked account.  

...Expenses of maintaining blocked property; liquidation of blocked account...Expenses of maintaining blocked property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2014-07-01

491

31 CFR 549.204 - Expenses of maintaining blocked physical property; liquidation of blocked property.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked property...Expenses of maintaining blocked physical property; liquidation of blocked property...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

492

31 CFR 593.204 - Expenses of maintaining blocked physical property; liquidation of blocked account.  

Code of Federal Regulations, 2013 CFR

...Expenses of maintaining blocked physical property; liquidation of blocked account...Expenses of maintaining blocked physical property; liquidation of blocked account...incident to the maintenance of physical property blocked pursuant to §...

2013-07-01

493

A Shifted Block Lanczos Algorithm 1: The Block Recurrence  

NASA Technical Reports Server (NTRS)

In this paper we describe a block Lanczos algorithm that is used as the key building block of a software package for the extraction of eigenvalues and eigenvectors of large sparse symmetric generalized eigenproblems. The software package comprises: a version of the block Lanczos algorithm specialized for spectrally transformed eigenproblems; an adaptive strategy for choosing shifts, and efficient codes for factoring large sparse symmetric indefinite matrices. This paper describes the algorithmic details of our block Lanczos recurrence. This uses a novel combination of block generalizations of several features that have only been investigated independently in the past. In particular new forms of partial reorthogonalization, selective reorthogonalization and local reorthogonalization are used, as is a new algorithm for obtaining the M-orthogonal factorization of a matrix. The heuristic shifting strategy, the integration with sparse linear equation solvers and numerical experience with the code are described in a companion paper.

Grimes, Roger G.; Lewis, John G.; Simon, Horst D.

1990-01-01

494

Diagnostic Diagram with polycyclic aromatic hydrocarbons in different types of galaxies  

NASA Astrophysics Data System (ADS)

In this contribution, we investigate the energetic processes associated to star formation activity in galaxies. In this way, spectroscopic data was used to discriminate those processes in a sample of starburst, luminous infrared galaxies-LIRGs, ultraluminous infrared galaxies-ULIRGs, and also in Seyfert, quasars and radio galaxies. We propose a new diagnostic diagram based on the polycyclic aromatic hydrocarbon features. The diagnostic diagram allow us to discriminate the behavior of starbursts and LIRGs-ULIRGs objects, taking into account the line emission of the PAHs, [NeII], [NeIII], and [OIV]. We found a good relation between [NeII] and PAH (11.2? m+11.3? m) in starburst, LINER and Seyfert samples.

Quintero, S.; Ramos P., A. F.; Higuera-G., M. A.; Martínez-Galarza, J. R.

2014-10-01

495

Use of bifurcation diagrams as fingerprints of chemical mechanisms  

SciTech Connect

Various chemical reagents were fed continuously into a continuously stirred tank reactor to perturb the Belousov-Zhabotinskii system. The resulting bifurcation diagrams each contain multiple curves separating regions with different types of dynamical behavior. These very complex diagrams can be used as fingerprints of the perturbing chemical mechanism. Essentially the same bifurcation structures were observed under the addition of formaldehyde and sodium bromite, indicating the same mechanism. The effect of bromomalonic and hypobromous acids was also found to be nearly identical; the slight differences between their fingerprints is explained by the effect of bromine, which contaminates the HOBr. Finally, the effect of added bromide is shown in another bifurcation diagram.

Noszticzius, Z.; McCormick, W.D.; Swinney, H.L. (Univ. of Texas, Austin (USA))

1989-04-06

496

Phase diagrams of single-domain ferroelectric-dielectric superlattices  

NASA Astrophysics Data System (ADS)

Using the thermodynamic theory, the authors developed misfit strain-temperature phase diagrams of single-domain ferroelectric-dielectric superlattices grown on cubic substrates. Owing to internal electric fields appearing in such multilayers, the superlattice diagrams are expected to be very different from phase maps of homogeneous ferroelectric films. The calculations show, however, that this electrostatic effect does not change relative positions of phase transition lines. It only shifts the diagram as a whole along the line separating stability ranges of paraelectric phase and in-plane polarization state. The magnitude of this shift is governed by the capacitance of dielectric layer and the thickness of ferroelectric one.

Urtiev, F. A.; Kukhar, V. G.; Pertsev, N. A.

2007-06-01

497

Cu-Zn binary phase diagram and diffusion couples  

NASA Technical Reports Server (NTRS)

The objectives of this paper are to learn: (1) what information a binary phase diagram can yield; (2) how to construct and heat treat a simple diffusion couple; (3) how to prepare a metallographic sample; (4) how to operate a metallograph; (5) how to correlate phases found in the diffusion couple with phases predicted by the phase diagram; (6) how diffusion couples held at various temperatures could be used to construct a phase diagram; (7) the relation between the thickness of an intermetallic phase layer and the diffusion time; and (8) the effect of one species of atoms diffusing faster than another species in a diffusion couple.

Mccoy, Robert A.

1992-01-01

498

Sloan Digital Sky Survey - H-R Diagram  

NSDL National Science Digital Library

This website, containing information from the Sloan Digital Sky Survey, provides students with the opportunity to make a H-R Diagram for different star systems. It goes through the relation between the color of a star and its surface temperature, in order to obtain a preliminary diagram. Then, using data from the Hipparcos probe, and the Pleiades system, the student is able to calculate the distance to several stars, which leads to the final version of the Diagram. The same concept is applied to Globular Clusters, and the student is able to tell the age of it by looking at its color.

2009-09-16

499

Mixing Block and Traditional Scheduling  

ERIC Educational Resources Information Center

In Boone, North Carolina, Watauga High School has developed an alternative schedule that blends traditional and block schedules. This composite schedule originated in the late 1990s when their faculty members and administrators were struggling to determine if the school should change to a full block schedule. The board of education encouraged…

Childers, Gary L.; Ireland, Rebecca Weeks

2005-01-01

500

Writing Blocks and Tacit Knowledge.  

ERIC Educational Resources Information Center

A review of the literature on writing block looks at two kinds: inability to write in a timely, fluent fashion, and reluctance by academicians to assist others in writing. Obstacles to fluent writing are outlined, four historical trends in treating blocks are discussed, and implications are examined. (MSE)

Boice, Robert

1993-01-01