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1

Reliability computation from reliability block diagrams  

NASA Technical Reports Server (NTRS)

A method and a computer program are presented to calculate probability of system success from an arbitrary reliability block diagram. The class of reliability block diagrams that can be handled include any active/standby combination of redundancy, and the computations include the effects of dormancy and switching in any standby redundancy. The mechanics of the program are based on an extension of the probability tree method of computing system probabilities.

Chelson, P. O.; Eckstein, R. E.

1971-01-01

2

Modeling process flow using diagrams  

Microsoft Academic Search

In the practice of process improvement, tools such as the flowchart, the value-stream map (VSM), and a variety of ad hoc variants of such diagrams are commonly used. The purpose of this paper is to present a clear, precise, and consistent framework for the use of such flow diagrams in process improvement projects. The paper finds that traditional diagrams, such

Benjamin Kemper; Jeroen de Mast; Michel Mandjes

2010-01-01

3

Function Block Diagrams * {ekjee, jbyoo, suhyun, cha}@dependable.kaist.ac.kr  

E-print Network

(Function Overview Diagram). FOD (data-flow diagram) , , 3 #12;(a) g_PZR_RPS_WR FOD (b) g_BP FOD 3Function Block Diagrams * , , , 373-1 {ekjee, jbyoo, suhyun, cha}@dependable.kaist.ac.kr : FBD(Function Block Diagram) FBD . PLC FBD C . FBD . FBD

4

Word-length determination and scaling software for a signal flow block diagram  

Microsoft Academic Search

Software for word-length determination and scaling of a general signal flow block diagram is developed for aiding the development of fixed-point digital signal processing algorithms. A fixed-point performance measure, such as signal to quantization noise ratio, and a hardware cost model are used as constraints to the optimization. Simulation using a real input signal is conducted for the evaluation of

Wonyong Sung; Ki-Il Kum

1994-01-01

5

Automated Modeling of Dynamic Reliability Block Diagrams Using Colored Petri Nets  

E-print Network

. BNF Backus-Naur form. CPN Colored Petri net. DFTA Dynamic fault tree analysis. DOM Document object model. DRBD Dynamic reliability block diagram. FTA Fault tree analysis. PDP Piecewise deterministic on statistical methods. Their typical examples are reliability block diagram (RBD), fault tree analysis (FTA

Xu, Haiping

6

Direct synthesis of optimized DSP assembly code from signal flow block diagrams  

Microsoft Academic Search

Block diagrams with signal flow semantics have proven their utility in system simulation and algorithm development. They can also be used as high-level languages for real-time system implementation and design. An approach to synthesizing optimized assembly code for programmable DSPs from block diagrams is described. The extensible block library defines code segments in a meta-assembly language that uses the syntax

Douglas B. Powell; Edward A. Lee; William C. Newman

1992-01-01

7

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

8

Development of the Functional Flow Block Diagram for the J-2X Rocket Engine System  

NASA Technical Reports Server (NTRS)

The J-2X program calls for the upgrade of the Apollo-era Rocketdyne J-2 engine to higher power levels, using new materials and manufacturing techniques, and with more restrictive safety and reliability requirements than prior human-rated engines in NASA history. Such requirements demand a comprehensive systems engineering effort to ensure success. Pratt & Whitney Rocketdyne system engineers performed a functional analysis of the engine to establish the functional architecture. J-2X functions were captured in six major operational blocks. Each block was divided into sub-blocks or states. In each sub-block, functions necessary to perform each state were determined. A functional engine schematic consistent with the fidelity of the system model was defined for this analysis. The blocks, sub-blocks, and functions were sequentially numbered to differentiate the states in which the function were performed and to indicate the sequence of events. The Engine System was functionally partitioned, to provide separate and unique functional operators. Establishing unique functional operators as work output of the System Architecture process is novel in Liquid Propulsion Engine design. Each functional operator was described such that its unique functionality was identified. The decomposed functions were then allocated to the functional operators both of which were the inputs to the subsystem or component performance specifications. PWR also used a novel approach to identify and map the engine functional requirements to customer-specified functions. The final result was a comprehensive Functional Flow Block Diagram (FFBD) for the J-2X Engine System, decomposed to the component level and mapped to all functional requirements. This FFBD greatly facilitates component specification development, providing a well-defined trade space for functional trades at the subsystem and component level. It also provides a framework for function-based failure modes and effects analysis (FMEA), and a rigorous baseline for the functional architecture.

White, Thomas; Stoller, Sandra L.; Greene, WIlliam D.; Christenson, Rick L.; Bowen, Barry C.

2007-01-01

9

Accuracy analysis of the parallel composition for the block diagram based reliability assessment of quantum circuits  

Microsoft Academic Search

Simulation cannot be applied for complex quantum circuits' reliability analysis. Therefore, mixed simulation - analytical techniques should be applied in order to evaluate the reliability of quantum devices. One of the most used analytical methods is represented by the reliability block diagrams (RBD). This paper presents the accuracy estimates analysis for the parallel composition in the RBD based reliability estimation

O. Boncalo; M. Vladutiu; A. Amaricai

2010-01-01

10

COMPLEXITY MEASURE FOR BLOCK DIAGRAMS E. S. Hori1  

E-print Network

different fields, e.g., system analysis (Ben-Hur et al., 2002), manufacturing processes (Deshmukh et al find difficult to understand (Flood and Carson, 1988); 4. Complex systems are typically organizations

Skogestad, Sigurd

11

Activity Diagrams Patterns for Modeling Business Processes  

E-print Network

on Software Engineering Research, Management and Applications (SERA 2013). The final publication is available consider in this paper the UML since it offers also many other diagrams (classes, state ma- chine, etc so as to build complex activity diagrams. Our ap- proach also takes classes into account. We have

André, Étienne

12

Surface Morphology Diagram for Cylinder-Forming Block Copolymer Thin Films  

SciTech Connect

We investigate the effect of annealing temperature (T), film thickness (hf) on the surface morphology of flow coated films of a cylinder forming block copolymer, poly (styrene-block-methyl methacrylate) (PS-b-PMMA). Surface morphology transitions from a perpendicular to a parallel cylinder orientation with respect to the substrate with increasing hf are observed in these model frustrated-interaction films where the substrate interaction is preferential for one of the blocks (PMMA) and nearly neutral for the other interface (polymer-air). In these films a transition occurs from cylinders oriented parallel to the substrate to a mixed or hybrid state where the two orientations coexist followed by a transition to cylinders oriented perpendicularly to the polymer-air interface for larger hf. The characteristic values of hf defining these surface morphological transitions depend on T and we construct a surface morphology diagram as a function of hf and T. The surface morphology diagram is found to depend on the method of film formation (flow coated versus spun cast films) so non-equilibrium effects evidently have a large effect on the surface pattern morphology. In particular, the residual solvent within the film (quantified by neutron reflectivity measurements) in the context of physics of glass-formation can have a large effect on the surface morphology diagram.

Zhang, Xiaohua [National Institute of Standards and Technology (NIST); Berry, Brian C. [National Institute of Standards and Technology (NIST); Yager, Kevin G. [National Institute of Standards and Technology (NIST); Kim, Sangcheol [National Institute of Standards and Technology (NIST); Jones, Ronald L. [National Institute of Standards and Technology (NIST); Satija, Sushil [National Institute of Standards and Technology (NIST); Pickel, Deanna L [ORNL; Douglas, Jack F> [National Institute of Standards and Technology (NIST); Karim, Alamgir [National Institute of Standards and Technology (NIST)

2008-01-01

13

Application of quaternary phase diagrams to compound semiconductor processing  

SciTech Connect

Isobaric, isothermal phase diagrams are a molar representation of condensed phases in equilibrium with each other at a fixed temperature, pressure, and composition. Since three or four elements are usually involved at a fabricated interface in a semiconductor device, knowledge of the appropriate ternary or quaternary phase diagram is important for optimizing the processing parameters and designing long term stability of devices. While the use of phase diagrams is well-established in the fields of metallurgy, ceramics and mineralogy, only recently have phase diagrams been employed to provide a framework for understanding thin film reactions on a substrate, encountered in semiconductor processing. Even though there are many examples of applications of ternary phase diagrams in the semiconductor literature (for instance, metallization of GaAs, the use of refractory metal silicides for metallization layers in VLSI devices and oxidation of III-V compounds), the same is not true for quaternary phase diagrams. To date, the only application is oxidation of mercury cadmium telluride. This lack of examples is not warranted, as four elements are often involved at a critical interface in compound semiconductor processing and devices. This paper reports on the progress made to remedy this situation by considering the application of quaternary phase diagrams to understanding and predicting the behavior of II-VI thin film interfaces in photovoltaic devices under annealing conditions. Moreover, for the first time, solid solubility is taken into account for quaternary phase diagrams of semiconductor systems.

Sinclair, R.

1994-10-01

14

2014 APSECA Safe Programming Guidance of Function Block Diagram for Reactor Protection Systems Dong-Ah Lee*, Junbeom Yoo  

E-print Network

in safety critical systems ­ Nuclear power plant · RPS (Reactor Protection System) · ESF-CCS (Engineering of Function Block Diagram for Reactor Protection Systems Software development in the nuclear power plant Nuclear Instrumentation & Control System R&D Center (KNICS) · FBD and Ladder Diagram (LD) to design

15

Equilibrium Phase Diagram of a Model Rod-Coil Block Copolymer  

NASA Astrophysics Data System (ADS)

Rod-coil block copolymers can be used to form important self-assembled structures containing functional blocks such as helical polypeptides or conducting polymers. The thermodynamics of these materials is distinct from classical block copolymers due to the conformational asymmetry of the polymer chain and the effect of liquid crystallinity on the microphase structure. We have recently developed a weakly segregated model system, poly(alkoxyphenylene vinylene-b-isoprene) (PPV-b-PI), in which rod-rod and rod-coil interactions are modulated by the presence of short side chains on the rod. We present the phase diagram for rod-coil block copolymers in the weak segregation limit, demonstrating equilibrium lamellar, nematic, and isotropic phases. As molecular weight is increased, subtle order-order transitions in the lamellar phase become obvious. In particular, we will discuss the relative stabilities of smectic phases based on scattering data. Finally, we will discuss the non-lamellar hexagonal phases that are observed as the relative rod-fraction of the block copolymer is decreased.

Olsen, B. D.; Segalman, R. A.

2006-03-01

16

An Algebra for Data Flow Diagram Process Decomposition  

Microsoft Academic Search

Data flow diagram process decomposition, as applied in the analysis phase of software engineering, is a top-down method that takes a process, and its input and output data flows, and logically implements the process as a network of smaller processes. The decomposition is generally performed in an ad hoc manner by an analyst applying heuristics, expertise, and knowledge to the

Mike Adler

1988-01-01

17

Simulating Building Blocks for Spikes Signals Processing  

Microsoft Academic Search

\\u000a In this paper we will explain in depth how we have used Simulink with the addition of Xilinx System Generation to design a\\u000a simulation framework for testing and analyzing neuro-inspired elements for spikes rate coded signals processing. Those elements\\u000a have been designed as building blocks, which represent spikes processing primitives, combining them we have designed more\\u000a complex blocks, which behaves

A. Jimenez-Fernandez; M. Domínguez-Morales; E. Cerezuela-Escudero; R. Paz-Vicente; A. Linares-Barranco; G. Jimenez

18

Structural Aspects of Business Process Diagram Abstraction  

Microsoft Academic Search

As companies more and more often turn to documenting their business processes in models, the task of managing large model collections becomes essential. There is a number of techniques simplifying this task, e.g., con- struction of customized process views and business process model abstraction. The latter aims at deriving abstract process representations from existing low-level models omitting details irrelevant for

Sergey Smirnov

2009-01-01

19

Dataflow diagram representation of biological process: DNA, RNA, and protein  

Microsoft Academic Search

In this paper, we introduce a new method of modeling tool for a biological process -central dogma. The data-flow diagram is used as a representation of the whole data input and output, which enables us to simulate, analyze, and manipulate (in the future) at our disposal. From DNA to protein via RNA is the one of most well-known biological process,

Joe W. Yeol; W. Samarrai; I. Barjis; Y. S. Ryu

2005-01-01

20

Stereo Diagrams  

NSDL National Science Digital Library

This exercise is an introduction to stereo diagrams. Students draw stereo diagrams for various models, determine the point group and crystal system of certain crystal shapes, and determine which block models match given stereo diagrams.

Dexter Perkins

21

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

22

Processing of IN-718 Lattice Block Castings  

NASA Technical Reports Server (NTRS)

Recently a low cost casting method known as lattice block casting has been developed by JAM Corporation, Wilmington, Massachusetts for engineering materials such as aluminum and stainless steels that has shown to provide very high stiffness and strength with only a fraction of density of the alloy. NASA Glenn Research Center has initiated research to investigate lattice block castings of high temperature Ni-base superalloys such as the model system Inconel-718 (IN-718) for lightweight nozzle applications. Although difficulties were encountered throughout the manufacturing process , a successful investment casting procedure was eventually developed. Wax formulation and pattern assembly, shell mold processing, and counter gravity casting techniques were developed. Ten IN-718 lattice block castings (each measuring 15-cm wide by 30-cm long by 1.2-cm thick) have been successfully produced by Hitchiner Gas Turbine Division, Milford, New Hampshire, using their patented counter gravity casting techniques. Details of the processing and resulting microstructures are discussed in this paper. Post casting processing and evaluation of system specific mechanical properties of these specimens are in progress.

Hebsur, Mohan G.

2002-01-01

23

Phase diagram of selectively cross-linked block copolymers shows chemically microstructured gel  

NASA Astrophysics Data System (ADS)

We study analytically the intricate phase behavior of cross-linked AB diblock copolymer melts, which can undergo two main phase transitions due to quenched random constraints. Gelation, i.e., spatially random localisation of polymers forming a system-spanning cluster, is driven by increasing the number parameter ? of irreversible, type-selective cross-links between random pairs of A blocks. Self-assembly into a periodic pattern of A/B-rich microdomains (microphase separation) is controlled by the AB incompatibility ? inversely proportional to temperature. Our model aims to capture the system's essential microscopic features, including an ensemble of random networks that reflects spatial correlations at the instant of cross-linking. We identify suitable order parameters and derive a free-energy functional in the spirit of Landau theory that allows us to trace a phase diagram in the plane of ? and ?. Selective cross-links promote microphase separation at higher critical temperatures than in uncross-linked diblock copolymer melts. Microphase separation in the liquid state facilitates gelation, giving rise to a novel gel state whose chemical composition density mirrors the periodic AB pattern.

von der Heydt, Alice; Zippelius, Annette

2015-02-01

24

Phase diagram of selectively cross-linked block copolymers shows chemically microstructured gel  

E-print Network

We study analytically the intricate phase behavior of cross-linked $AB$ diblock copolymer melts, which can undergo two main phase transitions due to quenched random constraints: Gelation, i.e., spatially random localization of polymers forming a system-spanning cluster, is driven by increasing the number parameter $\\mu$ of irreversible, type-selective cross-links between random pairs of $A$ blocks. Self-assembly into a periodic pattern of $A$/$B$-rich microdomains (microphase separation) is controlled by the $AB$ incompatibility $\\chi$ inversely proportional to temperature. Our model aims to capture the system's essential microscopic features, including an ensemble of random networks that reflects spatial correlations at the instant of cross-linking. We identify suitable order parameters and derive a free-energy functional in the spirit of Landau theory that allows us to trace a phase diagram in the plane of $\\mu$ and $\\chi$. Selective cross-links promote microphase separation at higher critical temperatures than in uncross-linked diblock copolymer melts. Microphase separation in the liquid state facilitates gelation, giving rise to a novel gel state whose chemical composition density mirrors the periodic $AB$ pattern.

Alice von der Heydt; Annette Zippelius

2014-09-29

25

WATER PROCESS SYSTEM FLOW DIAGRAM FOR MTR, TRA603. SUMMARY OF ...  

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

WATER PROCESS SYSTEM FLOW DIAGRAM FOR MTR, TRA-603. SUMMARY OF COOLANT FLOW FROM WORKING RESERVOIR TO INTERIOR OF REACTOR'S THERMAL SHIELD. NAMES TANK SECTIONS. PIPE AND DRAIN-LINE SIZES. SHOWS DIRECTION OF AIR FLOW THROUGH PEBBLE AND GRAPHITE BLOCK ZONE. NEUTRON CURTAIN AND THERMAL COLUMN DOOR. BLAW-KNOX 3150-92-7, 3/1950. INL INDEX NO. 531-0603-51-098-100036, REV. 6. - Idaho National Engineering Laboratory, Test Reactor Area, Materials & Engineering Test Reactors, Scoville, Butte County, ID

26

Analysing UML 2.0 activity diagrams in the software performance engineering process  

E-print Network

Analysing UML 2.0 activity diagrams in the software performance engineering process C. Canevet, S, there will typically be a static structure diagram (or class diagram) describing the classes and in- terfaces present an original method of analysing the newly- revised UML2.0 activity diagrams. Our analysis method

Stevens, Perdita

27

Design of processes with reactive distillation line diagrams  

SciTech Connect

On the basis of the transformation of concentration coordinates, the concept of reactive distillation lines is developed. It is applied to study the feasibility of a reactive distillation with an equilibrium reaction on all trays of a distillation column. The singular points in the distillation line diagrams are characterized in terms of nodes and saddles. Depending on the characterization of the reactive distillation line diagrams, it can be decided whether a column with two feed stages is required. On the basis of the reaction space concept, a procedure for identification of reactive distillation processes is developed, in which the reactive distillation column has to be divided into reactive and nonreactive sections. This can be necessary to overcome the limitations in separation which result from the chemical equilibrium. The concentration profile of this combined reactive/nonreactive distillation column is estimated using combined reactive/nonreactive distillation lines.

Bessling, B. [BASF Ludwigshafen (Germany). Engineering Research and Development] [BASF Ludwigshafen (Germany). Engineering Research and Development; Schembecker, G.; Simmrock, K.H. [Univ. of Dortmund (Germany). Dept. of Chemical Engineering] [Univ. of Dortmund (Germany). Dept. of Chemical Engineering

1997-08-01

28

HMI ring diagram analysis I. The processing pipeline  

NASA Astrophysics Data System (ADS)

The combination of high resolution, spatial coverage, and continuity of photospheric Doppler and other data from HMI has allowed us to embark on a program of systematic exploration of solar subsurface flows and thermal structure variations using the technique of ring-diagram analysis on an unprecedented scale. Two ring-diagrams pipelines exist: a synoptic program aimed at mapping the evolution of the circulation and local subsurface flows on a global scale from the surface to depths of down to 0.9Rsun, and a targeted program designed to provide a comprehensive view of the thermal structure anomalies associated with loci of magnetic activity over the course of their life cycles. In this paper we describe the analysis techniques implemented in the processing pipelines.

Bogart, R. S.; Baldner, C.; Basu, S.; Haber, D. A.; Rabello-Soares, M. C.

2011-01-01

29

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

30

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

31

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

32

HMI ring diagram analysis I. The processing pipeline  

Microsoft Academic Search

The combination of high resolution, spatial coverage, and continuity of photospheric Doppler and other data from HMI has allowed us to embark on a program of systematic exploration of solar subsurface flows and thermal structure variations using the technique of ring-diagram analysis on an unprecedented scale. Two ring-diagrams pipelines exist: a synoptic program aimed at mapping the evolution of the

R. S. Bogart; C. Baldner; S. Basu; D. A. Haber; M. C. Rabello-Soares

2011-01-01

33

Application of a feasible formability diagram for the effective design in stamping processes of automotive panels  

Microsoft Academic Search

The objective of this study is to propose a method of process design that uses a feasible formability diagram, which denotes the safe region without fracture and wrinkle, for the effective and rapid design of stamping processes. To determine the feasible formability diagram, FE-analyses have been performed for combinations of process variables that correspond to the orthogonal array of design

Dae-Cheol Ko; Seung-Hoon Cha; Sang-Kon Lee; Chan-Joo Lee; Byung-Min Kim

2010-01-01

34

Students' Ability to Solve Process-Diagram Problems in Secondary Biology Education  

ERIC Educational Resources Information Center

Process diagrams are important tools in biology for explaining processes such as protein synthesis, compound cycles and the like. The aim of the present study was to measure the ability to solve process-diagram problems in biology and its relationship with prior knowledge, spatial ability and working memory. For this purpose, we developed a test…

Kragten, Marco; Admiraal, Wilfried; Rijlaarsdam, Gert

2015-01-01

35

Block Digital Filter Implementation Techniques and Transform Domain Processing  

NASA Astrophysics Data System (ADS)

This dissertation is concerned with block implementation techniques of digital filters and their application to transform domain processing. Block implementation of digital filters is useful for high throughput filtering due to inherent parallelism. Furthermore, more accurate computation is possible through proper allocation of computation resources in the block transform domain when input data are correlated. The performance improvement is closely related to block transform coding gain of the input signal. By extending scalar linear constant coefficient difference equation (LCCDE) to block LCCDE, we have shown various block filter structure implementation techniques, and investigated their finite precision coefficient quantization effects. Particularly, block lattice implementation of IIR and FIR filters is of interest due to their good numerical properties. In order to derive the block lattice structures, we have used block lossless bounded real (BLBR) functions; in the block IIR lattice implementation, a BLBR function derived from the denominator of the block transfer function is used, which parallels the Gray-Markel lattice for the scalar case, and in the block FIR lattice implementation, the block version of power complementary pair polynomials is derived and utilized. It has been demonstrated that these block lattice filter structures have better finite coefficient quantization characteristics than those of any other block filter structures. The block filter structures are directly applied to transform domain filtering without any modification of the block filter structures. The matrix coefficients only need to be changed to the transform domain coefficients. It has been shown that nonuniform coefficient quantization in the transform domain filtering improves the accuracy of filtering for finite given computational resources (for example, number of transistors in the VLSI implementation).

Jang, Youngbeom

1994-01-01

36

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

37

Class Diagram Extraction from Textual Requirements Using Natural Language Processing (NLP) Techniques  

Microsoft Academic Search

The automation of class generation from natural language requirements is highly challenging. This paper proposes a method and a tool to facilitate requirements analysis process and class diagram extraction from textual requirements supporting natural language processing NLP and Domain Ontology techniques. Requirements engineers analyze requirements manually to come out with analysis artifacts such as class diagram. The time spent on

Mohd Ibrahim; Rodina Ahmad

2010-01-01

38

Stacking of blocks by chimpanzees: developmental processes and physical understanding  

Microsoft Academic Search

The stacking-block task has been used to assess cognitive development in both humans and chimpanzees. The present study reports\\u000a three aspects of stacking behavior in chimpanzees: spontaneous development, acquisition process following training, and physical\\u000a understanding assessed through a cylindrical-block task. Over 3 years of longitudinal observation of block manipulation, one\\u000a of three infant chimpanzees spontaneously started to stack up cubic

Misato Hayashi

2007-01-01

39

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

40

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

41

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

42

Light-emitting block copolymers composition, process and use  

DOEpatents

Generally, and in one form, the present invention is a composition of light-emitting block copolymer. In another form, the present invention is a process producing a light-emitting block copolymers that intends polymerizing a first di(halo-methyl) aromatic monomer compound in the presence of an anionic initiator and a base to form a polymer and contacting a second di(halo-methyl) aromatic monomer compound with the polymer to form a homopolymer or block copolymer wherein the block copolymer is a diblock, triblock, or star polymer. In yet another form, the present invention is an electroluminescent device comprising a light-emitting block copolymer, wherein the electroluminescent device is to be used in the manufacturing of optical and electrical devices.

Ferraris, John P.; Gutierrez, Jose J.

2006-11-14

43

Algorithm and block diagram for controlling the modes of operation of a hydroelectric plant with energy storage in a large energy complex  

Microsoft Academic Search

The paper presents the block diagram of an algorithm for optimizing the diurnal operations of a hydroelectric power plant with energy storage. This algorithm is part of the software of an automatic system of dispatcher control of the short-term operations of a power plant in a large energy complex. Some computational results are presented for the particular example of the

L. A. Karol; B. I. Silaev; V. M. Rabinkii

1978-01-01

44

Process logic flow diagram write up for the Advanced Recovery and Integrated Extraction System (ARIES) facility  

SciTech Connect

The Department of Energy Office of Fissile Materials Disposition (DOE-MD) is planning a facility to disassemble pits and convert the plutonium in the pits into a form suitable for international inspection. The facility, called the Advanced Recovery and Integrated Extraction System (ARIES) Facility, must handle much of the 38.2 metric tons of plutonium declared excess to national security needs in ten years of operation. A process logic flow diagram for the ARIES Facility is presented here. This flow diagram is based on and supported by a library of fact sheets on topics that impact the design of the facility. Developing the flow diagram raised issues that significantly impact the design of the facility. These issues are discussed later in this document, and for some issues, discussed in greater detail in the appropriate fact sheets. The flow diagram is designed to show requirements that dictate the need for space and/or equipment. In physically designing the facility, the same space or equipment may be used to meet several requirements. The flow diagram merely shows the activities that need to occur to meet requirements for the facility. The flow diagram is not associated with any DOE site. The requirements shown on the flow diagram may be met by an existing facilities at a given site. The flow diagram and this write up do not contain a great deal of detail on how each step in the diagram is performed. At this stage of design, the flow diagram merely identifies the need for the activity. Examples for some of the activities are given in the appropriate fact sheet. How the steps are performed becomes more defined as the design of the facility progresses.

Zygmunt, S.J.

1997-05-01

45

Decoupling Processes in Block-and-ash Flows  

NASA Astrophysics Data System (ADS)

Lava dome collapse and collapse of lava flow fronts generate short-lived, highly mobile block-and-ash flows, usually comprising three components, a high-density, ground-hugging basal avalanche, a low-density ash cloud surge and a more dilute ash cloud on top. Generally the basal avalanche is valley-confined whereas the overlying surge has the ability to decouple from the dense basal part, overtop topographic barriers and affect greater areas than the basal avalanche, hence posing a larger hazard to the population. These processes have been observed at several volcanoes, e.g. Unzen (Japan), Merapi (Indonesia) and Soufriere Hills (Montserrat), resulting often in the loss of lives. Decoupling is often accentuated by topographic obstructions causing blocking or deflecting of the basal avalanche. Currently laboratory flume experiments are being undertaken to examine the factors initiating and influencing the decoupling processes of block-and-ash flows. A better understanding of the flow dynamics of a moving block-and-ash flow and of the interaction with the underlying substrate and topographic irregularities will provide better hazard zone delineation maps for the future. The experimental results will be used to investigate the emplacement of the block-and-ash flows at Mount Tarawera, New Zealand, where the deposits show indicators of possible decoupling processes during the AD 1305 Kaharoa eruptive episode.

Hanenkamp, E.; Davies, T.

2009-05-01

46

Automatic identification of structural process weaknesses in flow chart diagrams  

Microsoft Academic Search

Purpose – Financial institutions have been engaged in numerous business process reengineering (BPR) projects to make their organizations more efficient. However, the success of BPR projects in banks varies significantly and it remains a challenge to systematically discover weaknesses in business process landscapes. Based on the flow chart notation language this paper seeks to argue for the definition of weakness

Axel Winkelmann; Burkhard Weiß

2011-01-01

47

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

Microsoft Academic Search

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

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

1999-01-01

48

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

49

Does the process map influence the outcome of quality improvement work? A comparison of a sequential flow diagram and a hierarchical task analysis diagram  

Microsoft Academic Search

BACKGROUND: Many quality and safety improvement methods in healthcare rely on a complete and accurate map of the process. Process mapping in healthcare is often achieved using a sequential flow diagram, but there is little guidance available in the literature about the most effective type of process map to use. Moreover there is evidence that the organisation of information in

Lacey Colligan; Janet E Anderson; Henry WW Potts; Jonathan Berman

2010-01-01

50

Morphology phase diagram of ultrathin anatase TiO2 films templated by a single PS-b-PEO block copolymer.  

PubMed

Ultrathin TiO2 films showing rich morphologies are prepared on Si(100) substrates using sol-gel chemistry coupled with an amphilic polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymer as a structure-directing agent. The block copolymer undergoes a good-poor solvent pair induced phase separation in a mixed solution of 1,4-dioxane, concentrated hydrochloric acid (HCl), and titanium tetraisopropoxide (TTIP). By adjusting the weight fractions of 1,4-dioxane, HCl, and TTIP, inorganic block copolymer composite films containing a variety of different morphologies are obtained. On the basis of the results a ternary phase diagram of the morphologies is mapped. By calcination, anatase TiO2 films are achieved. The morphologies and crystallographic phase of the films are studied with AFM, SEM, and XRD, respectively, and the formation mechanisms of the different morphologies are discussed. PMID:16594703

Cheng, Ya-Jun; Gutmann, Jochen S

2006-04-12

51

Does the process map influence the outcome of quality improvement work? A comparison of a sequential flow diagram and a hierarchical task analysis diagram  

PubMed Central

Background Many quality and safety improvement methods in healthcare rely on a complete and accurate map of the process. Process mapping in healthcare is often achieved using a sequential flow diagram, but there is little guidance available in the literature about the most effective type of process map to use. Moreover there is evidence that the organisation of information in an external representation affects reasoning and decision making. This exploratory study examined whether the type of process map - sequential or hierarchical - affects healthcare practitioners' judgments. Methods A sequential and a hierarchical process map of a community-based anti coagulation clinic were produced based on data obtained from interviews, talk-throughs, attendance at a training session and examination of protocols and policies. Clinic practitioners were asked to specify the parts of the process that they judged to contain quality and safety concerns. The process maps were then shown to them in counter-balanced order and they were asked to circle on the diagrams the parts of the process where they had the greatest quality and safety concerns. A structured interview was then conducted, in which they were asked about various aspects of the diagrams. Results Quality and safety concerns cited by practitioners differed depending on whether they were or were not looking at a process map, and whether they were looking at a sequential diagram or a hierarchical diagram. More concerns were identified using the hierarchical diagram compared with the sequential diagram and more concerns were identified in relation to clinical work than administrative work. Participants' preference for the sequential or hierarchical diagram depended on the context in which they would be using it. The difficulties of determining the boundaries for the analysis and the granularity required were highlighted. Conclusions The results indicated that the layout of a process map does influence perceptions of quality and safety problems in a process. In quality improvement work it is important to carefully consider the type of process map to be used and to consider using more than one map to ensure that different aspects of the process are captured. PMID:20056005

2010-01-01

52

Molecular systems biology: data-flow diagram modeling of process in protein  

Microsoft Academic Search

In this paper, we introduce a new method of modeling tool for a biological process - central dogma. The data-flow diagram is used as a representation of the whole data input and output, which enables us to simulate, analyze, and manipulate (in the future) at our disposal. From DNA to protein via RNA is the one of most well-known biological

J. W. Yeol; I. Barjis; Y. S. Ryu

2005-01-01

53

Display the CIE 1931 color chromaticity diagram with digital image processing  

NASA Astrophysics Data System (ADS)

The chromaticity diagram is also needed in the instrument of a non-contact system for measuring color of printed material. The purpose of this paper is to design the color chromaticity diagram identical with the CIE 1931 and its program in MATLAB with digital image processing is realized. The chromaticity diagram in a binary format representation as black and white is used and the boundary for every color is confined by a closed black real line. More than 20 kinds of colors are selected by the psychophysiology of vision according to the CIE 1931 and their values in RGB are also are given. After every region colors are put in, the closed black real lines are wiped away and their values of RGB are updated according to the value for the nearest color region. The program including the filters in RGB space run until the all steps between every two colors up to the psychophysiology of vision, the chromaticity diagram is obtained. The values of RGB in every position in the chromaticity diagram can be presented.

Zhao, Hong-Dong; Yao, Yi-Yang; Sun, Fei; Zhang, Qin; Yang, Xiao-Hui

2013-12-01

54

Ecohydrologic process modeling of mountain block groundwater recharge.  

PubMed

Regional mountain block recharge (MBR) is a key component of alluvial basin aquifer systems typical of the western United States. Yet neither water scientists nor resource managers have a commonly available and reasonably invoked quantitative method to constrain MBR rates. Recent advances in landscape-scale ecohydrologic process modeling offer the possibility that meteorological data and land surface physical and vegetative conditions can be used to generate estimates of MBR. A water balance was generated for a temperate 24,600-ha mountain watershed, elevation 1565 to 3207 m, using the ecosystem process model Biome-BGC (BioGeochemical Cycles) (Running and Hunt 1993). Input data included remotely sensed landscape information and climate data generated with the Mountain Climate Simulator (MT-CLIM) (Running et al. 1987). Estimated mean annual MBR flux into the crystalline bedrock terrain is 99,000 m(3) /d, or approximately 19% of annual precipitation for the 2003 water year. Controls on MBR predictions include evapotranspiration (radiation limited in wet years and moisture limited in dry years), soil properties, vegetative ecotones (significant at lower elevations), and snowmelt (dominant recharge process). The ecohydrologic model is also used to investigate how climatic and vegetative controls influence recharge dynamics within three elevation zones. The ecohydrologic model proves useful for investigating controls on recharge to mountain blocks as a function of climate and vegetation. Future efforts will need to investigate the uncertainty in the modeled water balance by incorporating an advanced understanding of mountain recharge processes, an ability to simulate those processes at varying scales, and independent approaches to calibrating MBR estimates. PMID:19702780

Magruder, Ian A; Woessner, William W; Running, Steve W

2009-01-01

55

Block copolymers useful for enhanced oil recovery processes  

SciTech Connect

A method is described for permeability control of a subterranean formation and for enhancing oil recovery from the subterranean formation. The method comprising consists of injecting an aqueous solution comprised of a block copolymer having a segment which entangles in a high brine environment to function as a physical crosslink and a segment which form a continuous non- or low degree crosslinked phase which is brine tolerant. The block copolymer has the structural form of ABA triblock or (AB)/sub n/ multiblock, wherein A is a brine sensitive polymer block capable forming entangled segments, each a polymer block being characterized by a degree of hydrolysis of over 30% and a degree of polymerization of 1,000 to 200,000, each B polymer block is a brine tolerant segment and n is a number of at least 2, each B polymer block having a degree of polymerization of 10,000 to 600,000.

Shu, P.

1989-03-07

56

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

NASA Astrophysics Data System (ADS)

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.

2007-11-01

57

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

58

Nursing job process analysis from viewpoint of process design by job diagram.  

PubMed

Recently Japan demands more and more quality assurance in clinical practice. Several aspects of issues have been discussed to provide significant suggestions for nursing quality assurance. In the quality management field, Process Design, which is known to contribute to quality assurance, is an important frame. This study attempts to analyze the nursing job process from the viewpoint of process design. As a result, some knowledge on the nursing job process could be comprehended. Process analysis from the viewpoint of Process Design is considered significant in nursing practice and further improvement of its technique and application is a challenge for the future. PMID:17102465

Dannoue, Hideo; Tsuru, Satoko; Munechika, Masahiko; Iizuka, Yoshinori

2006-01-01

59

Figure 1. Block diagram of the turbo decoder. A Memory-Reduced Log-MAP Kernel for Turbo Decoder  

E-print Network

, +1) k 7 * ( +1, -1) k 2 * ( +1, +1, -1) k 6 ( -1, +1) k 1 = -k 2 ( +1, -1, +1) k 5 ( -1, -1) k 0 = -k 3 ( +1, -1, -1) k 4 * ( -1, +1, +1) k 3 = -k 4 ( -1, +1, -1) k 2 = -k 5 ( -1, -1, +1) k 1 = -k 6 area in UMC 0.18um CMOS process. I. INTRODUCTION The turbo codes have been proved that they can get

Hung, Shih-Hao

60

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

61

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

62

Block copolymers useful for enhanced oil recovery processes  

SciTech Connect

This patent describes a method for permeability control of a subterranean formation and for enhancing oil recovery from the subterranean formation. It comprises: injecting into the subterranean formation an aqueous solution comprised of a linear block copolymer having the structural form of ABA triblock or (AB){sub {ital n}} multiblock wherein A is a petrophilic polymer segment capable of being adsorbed on the surface of rock, B is a polymer segment inert to rock and n is a number of at least 2.

Shu, P.

1990-03-20

63

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.

64

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, ? is the Flory-Huggins Chi Parameter, and N is the length of the block.

Iacovella, Christopher R.

2006-11-20

65

Block copolymers useful for enhanced oil recovery processes  

SciTech Connect

This patent describes a method for permeability control of a subterranean formation and for enhancing oil recovery from the subterranean formation. The method comprising injecting into the subterranean formation an aqueous solution comprised of a block copolymer having the structural form of ABA triblock or (AB){sub n} multiblock wherein A is a crosslinkable polymer, B is a non-crosslinkable polymer or a polymer having low reactivity to crosslinking agents, n is a number of at least 2 and a crosslinking agent. Wherein A is selected from the group consisting of polyacrylic acid, partially hydrolyzed polyacrylamide, highly hydrolyzed polyacrylamide, partially hydrolyzed polyacrylic ester, highly hydrolyzed polyacrylic ester, polyvinyl alcohol and mixtures thereof and B is selected from the group consisting of polyacrylamide, partially hydrolyzed polyacrylamide, polyalkylene ethers, polyvinyl alcohol and polyvinylpyridine.

Shu, P.

1989-10-03

66

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

67

Batch process diagnosis: PLS with variable selection versus block-wise PCR  

Microsoft Academic Search

Data from a batch chemical process have been analysed in order to diagnose the causes of variability of a final quality parameter. The trajectories of 47 process variables from 37 batches have been arranged in a matrix by using alignment methods. Two different approaches are compared to diagnose the key process variables: PLS with variable selection and block-wise PCR. The

Manuel Zarzo; Alberto Ferrer

2004-01-01

68

Automatic Translation of a Process Level Petri-Net to a Ladder Diagram  

Microsoft Academic Search

\\u000a \\u000a Major part of discrete industrial automation hardware is controlled by Programmable Logic Controllers (PLCs). While Petri-nets\\u000a (PNs) have been proposed by many researchers for modelling shop floor discrete control, the majority of the world PLCs are\\u000a programmed using ladder diagrams (LD) and significant portion of them cannot be programmed using another language. This paper\\u000a proposes hierarchical approach to translating PN

Yuval Cohen; Ming-En Wang; Bopaya Bidanda

2008-01-01

69

Signal Processing: Image Communication 20 (2005) 435446 Low-complexity GMM-based block quantisation of images  

E-print Network

Signal Processing: Image Communication 20 (2005) 435­446 Low-complexity GMM-based block in the presence of current state-of-the-art wavelet-based coders, the Gaussian mixture model (GMM)-based block coders. In this paper, a GMM-based block quantiser of low computational complexity is presented which

70

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.

71

Mollier-I, S-Diagrams for Combustion Gases in Data Processing  

NASA Technical Reports Server (NTRS)

In order to have all the thermal and caloric states of combustion gases accessible in a computer, closed mathematical approximation equations were established for the real factors, the enthalpy and the entropy of a real combustion gas. The equations approximate the various effects of molecular forces real gas influence and dissociation - at temperatures of 200 K to 6,000 K, pressures of 0.001 to 1,000 bar, and in the range from stoichiometric composition to air. A system of subprograms is listed in FORTRAN, by means of which thermodynamic calculations can be carried out in the same manner as with Mollier I,S diagrams.

Zacharias, F.

1982-01-01

72

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

73

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

74

Summarization of Diagrams in Documents  

Microsoft Academic Search

Documents are composed of text and graphics. There is substantial work on automated text summarization but almost none on the automated summarization of graphics. Four examples of diagrams from the scientific literature are used to indicate the problems and possible solutions: a table of images, a flow chart, a set of x,y data plots, and a block diagram. Manual summaries

Robert P. Futrelle

1999-01-01

75

Automated Processing of LASCO Coronal Images: Spurious Point-Source-Filtering and Missing-Blocks Correction  

NASA Astrophysics Data System (ADS)

We report on automated procedures for correcting the images of the LASCO coronagraph for i) spurious quasi-point-sources such as the impacts of cosmic rays, stars, and planets, and ii) the absence of signal due to transmission errors or dropouts, which results in blocks of missing information in the images. Correcting for these undesirable artifacts is mandatory for all quantitative works on the solar corona that require data inversion and/or long series of images, for instance. The nonlinear filtering of spike noise or point-like objects is based on mathematical morphology and implements the procedure opening by morphological reconstruction. However, a simple opening filter is applied whenever the fractional area of corrupted pixels exceeds 50 % of the original image. We describe different strategies for reconstructing the missing information blocks. In general, it is possible to implement the method of averaged neighbors using the two images obtained immediately before and after the corrupted image. For the other cases, and in particular when missing blocks overlapped in three images, we developed an original procedure of weighted interpolation along radial profiles from the center of the Sun that intercept the missing block(s). This procedure is also adequate for the saturated images of bright planets (such as Venus) that bleed along the neighboring pixels. Missing blocks in polarized images may generally be reconstructed using the associated unpolarized image of the same format. But in the case of overlapping missing blocks, we implemented our procedure of weighted interpolation. All tests performed on numerous LASCO-C2 images at various periods of solar activity ( i.e. varying complexity of the structure of the corona) demonstrate the excellent performance of these new procedures, with results vastly superior to the methods implemented so far in the pipeline-processing of the LASCO images.

Pagot, E.; Lamy, P.; Llebaria, A.; Boclet, B.

2014-04-01

76

76 FR 63654 - Outer Continental Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer Continental...Official Protraction Diagram (OPD), Lease Maps, and Supplemental Official OCS Block Diagrams...OCS Official Protraction Diagram, Lease Maps, and Supplemental Official OCS Shelf...

2011-10-13

77

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

78

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

PubMed

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

79

A Diagramming Software for UML Class Diagrams  

Microsoft Academic Search

\\u000a UML diagrams have become increasingly important in the engineering and reengineering processes for software systems. Of particular\\u000a interest are UML class diagrams whose purpose is to display class hierarchies (generalizations), associations, aggregations,\\u000a and compositions in one picture. The combination of hierarchical and non-hierarchical relations poses a special challenge\\u000a to a graph layout tool.

Carsten Gutwengerl; Michael Jünger; Karsten Kleinl; Joachim Kupkel; Sebastian Leipert; Petra Mutzel

80

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

81

Lucidchart: Diagramming  

NSDL National Science Digital Library

For all those who have wrestled with creating charts and diagrams in word processors, the Google Chrome application Lucidchart may be a long-awaited answer. Users can start using the intuitive drag-and-drop interface right away, although a free signup is required to save diagrams. By sharing a link with coworkers, project collaborators can work on the same diagram at the same time. This application is compatible with all computers running Google Chrome.

2012-08-24

82

Venn Diagrams  

NSDL National Science Digital Library

In this activity, students are given a Venn diagram with certain rules and an element. They must then determine where in the Venn diagram the element belongs. This activity allows students to practice placing elements in Venn diagrams as well as reviewing mathematical terms associated with the different rules. 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.

2011-05-24

83

Efficient block processing of long duration biotelemetric brain data for health care monitoring  

NASA Astrophysics Data System (ADS)

In real time clinical environment, the brain signals which doctor need to analyze are usually very long. Such a scenario can be made simple by partitioning the input signal into several blocks and applying signal conditioning. This paper presents various block based adaptive filter structures for obtaining high resolution electroencephalogram (EEG) signals, which estimate the deterministic components of the EEG signal by removing noise. To process these long duration signals, we propose Time domain Block Least Mean Square (TDBLMS) algorithm for brain signal enhancement. In order to improve filtering capability, we introduce normalization in the weight update recursion of TDBLMS, which results TD-B-normalized-least mean square (LMS). To increase accuracy and resolution in the proposed noise cancelers, we implement the time domain cancelers in frequency domain which results frequency domain TDBLMS and FD-B-Normalized-LMS. Finally, we have applied these algorithms on real EEG signals obtained from human using Emotive Epoc EEG recorder and compared their performance with the conventional LMS algorithm. The results show that the performance of the block based algorithms is superior to the LMS counter-parts in terms of signal to noise ratio, convergence rate, excess mean square error, misadjustment, and coherence.

Soumya, I.; Zia Ur Rahman, M.; Rama Koti Reddy, D. V.; Lay-Ekuakille, A.

2015-03-01

84

Towards Obtaining Analysis-Level Class and Use Case Diagrams from Business Process Models  

Microsoft Academic Search

Nowadays, business process modeling, using industrial standards such as UML or BPMN, offers us a good opportunity to incorporate\\u000a requirements at high levels of abstraction. In the context of Model Driven Architecture (MDA), the business process model\\u000a is considered as a Computation Independent Model (CIM). In our proposal we will transform the business process specifications\\u000a into analysis-level classes and use

Alfonso Rodríguez; Eduardo Fernández-medina; Mario Piattini

2008-01-01

85

Venn Diagrams  

NSDL National Science Digital Library

This interactive problem provides an opportunity for children to become familiar with Venn diagrams, while reinforcing knowledge of number properties. Students must place the numbers from 1 to 40 into a Venn diagram of two sets with an intersection. The Teachers' Notes page offers rationale, suggestions for implementation, discussion questions, ideas for extension and support.

86

Venn Diagrams  

NSDL National Science Digital Library

This lesson is designed to introduce students to sorting objects/elements using Venn diagrams. This lesson provides links to discussions and activities related to Venn diagrams as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

2011-05-23

87

Using ordered partial binary decision diagrams, forced basis nodes, and the blocking method for observability to calculate bounds on testability analysis measures  

E-print Network

of the combinational logic block being analyzed, so each pj is actually a PI signal probability (usually 0. 5). cafe~rob(G): IGI = ? number of nodes in graph G V ? = the number of different variables (indices) index(n;) ? = the index of node nv which corresponds...-controllability are determined by the cole~rob algorithm described above. Cl(l) = calc~rob Isig(l)) CO(l) = calc~rob ( sig(l) ), where f represents the logical inversion of a function f. The observability of a line in a circuit is the probability that a...

Crofts, Andrew H.

1995-01-01

88

Application of ISO22000, failure mode, and effect analysis (FMEA) cause and effect diagrams and pareto in conjunction with HACCP and risk assessment for processing of pastry products.  

PubMed

The Failure Mode and Effect Analysis (FMEA) model has been applied for the risk assessment of pastry processing. A tentative approach of FMEA application to the pastry industry was attempted in conjunction with ISO22000. Preliminary Hazard Analysis was used to analyze and predict the occurring failure modes in a food chain system (pastry processing plant), based on the functions, characteristics, and/or interactions of the ingredients or the processes, upon which the system depends. Critical Control points have been identified and implemented in the cause and effect diagram (also known as Ishikawa, tree diagram, and fishbone diagram). In this work a comparison of ISO22000 analysis with HACCP is carried out over pastry processing and packaging. However, the main emphasis was put on the quantification of risk assessment by determining the Risk Priority Number (RPN) per identified processing hazard. Storage of raw materials and storage of final products at -18°C followed by freezing were the processes identified as the ones with the highest RPN (225, 225, and 144 respectively) and corrective actions were undertaken. Following the application of corrective actions, a second calculation of RPN values was carried out leading to considerably lower values (below the upper acceptable limit of 130). It is noteworthy that the application of Ishikawa (Cause and Effect or Tree diagram) led to converging results thus corroborating the validity of conclusions derived from risk assessment and FMEA. Therefore, the incorporation of FMEA analysis within the ISO22000 system of a pastry processing industry is considered imperative. PMID:21838557

Varzakas, Theodoros H

2011-09-01

89

Characteristic Features of Process Sequence Diagrams for the Continuous Preparation of Multicomponent Powder Mixtures  

Microsoft Academic Search

At the present time, continuous-mixing processes, which make it possible to react to deviations from the normal course of an operation, and to regulate these deviations, are used to produce multicomponent powder mixtures. That mixture, when the components for the minimum heterogenous reaction microcell in which they are in the required (assigned) proportion and required (assigned) mutual arrangement dictated by

A. V. Chuvpilo

2001-01-01

90

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

91

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

92

Phase Diagrams in Vivo  

NSDL National Science Digital Library

This activity uses three experiments for students to construct a phase diagram; the experiments have been videotaped and can be seen online. The purpose of this laboratory as designed is to gain familiarity with simple phase diagrams, their construction, and their applications to the understanding of geological and environmental problems. Subsidiary objectives include development of strategies for data processing including evaluation of assumptions and sources of errors, as well as honing of computer, spreadsheet, presentation (tabular and graphical), and report writing skills.

93

Application of quaternary phase diagrams to compound semiconductor processing. Progress report, April 1, 1988--December 31, 1988  

SciTech Connect

This paper considers the application of quaternary phase diagrams to understanding and predicting the behavior of II-VI thin film interfaces in photovoltaic devices under annealing conditions. Examples, listed in a table, include semiconductor/insulator/semiconductor (SIS) layered structures, II-VI/II-VI and III-V/II-VI epitaxial heterojunctions and oxidation of ternary compounds. Solid solubility is taken into account for quaternary phase diagrams of semiconductor systems. Using free energies of formation, a method to calculate the quaternary phase diagrams was developed. The Ga-As-II-VI and Cd-Te-Zn-O phase diagrams are reviewed as examples of quaternary phase diagrams without and with solid solubility.

Schwartzman, A.

1988-12-31

94

A comprehensive wiring diagram of the protocerebral bridge for visual information processing in the Drosophila brain.  

PubMed

How the brain perceives sensory information and generates meaningful behavior depends critically on its underlying circuitry. The protocerebral bridge (PB) is a major part of the insect central complex (CX), a premotor center that may be analogous to the human basal ganglia. Here, by deconstructing hundreds of PB single neurons and reconstructing them into a common three-dimensional framework, we have constructed a comprehensive map of PB circuits with labeled polarity and predicted directions of information flow. Our analysis reveals a highly ordered information processing system that involves directed information flow among CX subunits through 194 distinct PB neuron types. Circuitry properties such as mirroring, convergence, divergence, tiling, reverberation, and parallel signal propagation were observed; their functional and evolutional significance is discussed. This layout of PB neuronal circuitry may provide guidelines for further investigations on transformation of sensory (e.g., visual) input into locomotor commands in fly brains. PMID:23707064

Lin, Chih-Yung; Chuang, Chao-Chun; Hua, Tzu-En; Chen, Chun-Chao; Dickson, Barry J; Greenspan, Ralph J; Chiang, Ann-Shyn

2013-05-30

95

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

96

Scaffolding cognitive and metacognitive processes in low verbal ability learners: Use of diagrams in computer-based training environments  

Microsoft Academic Search

This study investigated how instructionalstrategies can support learners' knowledgeacquisition and metacomprehension of complexsystems in a computer-based trainingenvironment, and how individual characteristicsinteract with these manipulations. Incorporating diagrams into the trainingfacilitated performance on measures ofintegrative knowledge (i.e., the integrationand application of task-relevant knowledge),but had no significant effect on measures ofdeclarative knowledge (i.e., mastery of basicfactual knowledge). Diagrams additionallyfacilitated the development of accurate

Haydee M. Cuevas; Stephen M. Fiore; Randall L. Oser

2002-01-01

97

76 FR 54787 - Outer Continental Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer Continental...Shelf Official Protraction Diagram, Lease Maps, and Supplemental Official Outer Continental...Official Protraction Diagram (OPD), Lease Maps, and Supplemental Official OCS Block...

2011-09-02

98

Phase Diagrams  

NSDL National Science Digital Library

This handout and problem set is a stand alone tutorial that introduces students to the basics of phase diagrams and the phase rule. It is a rather lengthy exercise, suitable as a homework assignment. It can replace lectures and yields superior learning.

Dexter Perkins

99

Scrutinizing UML Activity Diagrams  

NASA Astrophysics Data System (ADS)

Building an information system involves two processes: conceptual modeling of the “real world domain” and designing the software system. Object-oriented methods and languages (e.g., UML) are typically used for describing the software system. For the system analysis process that produces the conceptual description, object-oriented techniques or semantics extensions are utilized. Specifically, UML activity diagrams are the “flow charts” of object-oriented conceptualization tools. This chapter proposes an alternative to UML activity diagrams through the development of a conceptual modeling methodology based on the notion of flow.

Al-Fedaghi, Sabah

100

A progress report for the large block test of the coupled thermal-mechanical-hydrological-chemical processes  

SciTech Connect

This is a progress report on the Large Block Test (LBT) project. The purpose of the LBT is to study some of the coupled thermal-mechanical-hydrological-chemical (TMHC) processes in the near field of a nuclear waste repository under controlled boundary conditions. To do so, a large block of Topopah Spring tuff will be heated from within for about 4 to 6 months, then cooled down for about the same duration. Instruments to measure temperature, moisture content, stress, displacement, and chemical changes will be installed in three directions in the block. Meanwhile, laboratory tests will be conducted on small blocks to investigate individual thermal-mechanical, thermal-hydrological, and thermal-chemical processes. The fractures in the large block will be characterized from five exposed surfaces. The minerals on fracture surfaces will be studied before and after the test. The results from the LBT will be useful for testing and building confidence in models that will be used to predict TMHC processes in a repository. The boundary conditions to be controlled on the block include zero moisture flux and zero heat flux on the sides, constant temperature on the top, and constant stress on the outside surfaces of the block. To control these boundary conditions, a load-retaining frame is required. A 3 x 3 x 4.5 m block of Topopah Spring tuff has been isolated on the outcrop at Fran Ridge, Nevada Test Site. Pre-test model calculations indicate that a permeability of at least 10{sup -15} m{sup 2} is required so that a dryout zone can be created within a practical time frame when the block is heated from within. Neutron logging was conducted in some of the vertical holes to estimate the initial moisture content of the block. It was found that about 60 to 80% of the pore volume of the block is saturated with water. Cores from the vertical holes have been used to map the fractures and to determine the properties of the rock. A current schedule is included in the report.

Lin, W.; Wilder, D.G.; Blink, J. [and others

1994-10-01

101

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

102

Program Synthesizes UML Sequence Diagrams  

NASA Technical Reports Server (NTRS)

A computer program called "Rational Sequence" generates Universal Modeling Language (UML) sequence diagrams of a target Java program running on a Java virtual machine (JVM). Rational Sequence thereby performs a reverse engineering function that aids in the design documentation of the target Java program. Whereas previously, the construction of sequence diagrams was a tedious manual process, Rational Sequence generates UML sequence diagrams automatically from the running Java code.

Barry, Matthew R.; Osborne, Richard N.

2006-01-01

103

Scaffolding Cognitive and Metacognitive Processes in Low Verbal Ability Learners: Use of Diagrams in Computer-Based Training Environments.  

ERIC Educational Resources Information Center

This study of undergraduates investigated how scaffolding instructional strategies can support learners' knowledge acquisition and metacomprehension of complex systems in a computer-based training environment. Results showed that incorporating diagrams facilitated performance on measures of integrative knowledge and facilitated the development of…

Cuevas, Haydee M.; Fiore, Stephen M.; Oser, Randall L.

2002-01-01

104

Understanding Network Diagrams.  

ERIC Educational Resources Information Center

A survey of a range of introductory university level textbooks in the social sciences found little use of network diagrams (NDs), i.e., graphic representations of processes, organizations, systems, and mechanisms. NDs can be viewed as a text/picture hybrid medium with titles and captions serving to qualify and identify the meaning and status of…

Waller, Robert

105

Spectrum Analyzer Basics Simplified Block Diagram  

E-print Network

IF Filters Horizontal Vertical Video Averaging Filter Log Amp/ DetectorMixer Processor/ Display Tracking mixer from strong signals, improves compression point and intermodulation performance of analyzer

Kuhn, William B.

106

Process off-gas characterization experiments for block reactor runs 10 and 12  

SciTech Connect

Western Research Institute (WRI) has developed a facility to study gaseous emissions from a block reactor by sampling volatile trace metals, particulates, and gas condensates. The facility was recently used in two experiments to sample process off-gas from the retorting of an eastern oil shale. Those elements found in measurable quantities in the retort off-gas of the first experiment were silver, aluminium, arsenic, boron, calcium, sodium, iron, mercury, magnesium, molybdenum, phosphorus, selenium, silicon, and zinc. Elements detected in the second experiment were arsenic, boron, calcium, chromium, copper, sodium, iron, mercury, magnesium, nickel, phosphorus, and selenium. The off-gas samples in both experiments contained very low quantities of metals. There are probably several causes for the low recovery of metals. the most salient characteristic of the off-gas from eastern oil shale compared with that from western oil shale is the high concentration of sulfur. The amount of sulfur in the off-gas depends on the sulfur source, reaction, temperature, and steam injection rate. In these experiments, the presence of oxygen in the off-gas allowed the formation of subsequent precipitation of elemental sulfur, thus hampering accurate characterization of the sulfur species in the off-gas. 11 refs., 5 figs., 10 tabs.

Biezugbe. G.B.O.; Place, B.G.; Owen, T.E.; Barbour, A.

1986-07-01

107

A multiscale modeling study of loss processes in block-copolymer-based solar cell nanodevices.  

PubMed

Flexible photovoltaic devices possess promising perspectives in opto-electronic technologies, where high mobility and/or large-scale applicability are important. However, their usefulness in such applications is currently still limited due to the low level of optimization of their performance and durability. For the improvement of these properties, a better understanding and control of small-scale annihilation phenomena involved in the photovoltaic process, such as exciton loss and charge carrier loss, is necessary, which typically implicates multiple length- and time-scales. Here, we study the causes for their occurrence on the example of nanostructured diblock- and triblock-copolymer systems by making use of a novel solar-cell simulation algorithm and explore new routes to optimize their photovoltaic properties. A particular focus is set on the investigation of exciton and charge carrier loss phenomena and their dependence on the inter-monomeric interaction strength, chain architecture, and external mechanical loading. Our simulation results reveal that in the regime from low up to intermediate ?-parameters an increasing number of continuous percolation paths is created. In this parameter range, the internal quantum efficiency (IQE) increases up to a maximum, characterized by a minimum in the number of charge losses due to charge recombination. In the regime of high ?-parameters both block-copolymer systems form nanostructures with a large number of bottlenecks and dead ends. These lead to a large number of charge losses due to charge recombination, charge trapping, and a deteriorated exciton dissociation, resulting in a significant drop in the IQE. Moreover, we find that the photovoltaic performance of the triblock-copolymer material decreases with increasing mechanical loading, caused by a growing number of charge losses due to charge recombination and charge accumulation. Finally, we demonstrate that the process of charge trapping in defects can be reversed by changing the polarity of the electrodes, which confers these materials the ability to be used as charge storage media. PMID:23485320

Donets, Sergii; Pershin, Anton; Christlmaier, Martin J A; Baeurle, Stephan A

2013-03-01

108

A multiscale modeling study of loss processes in block-copolymer-based solar cell nanodevices  

NASA Astrophysics Data System (ADS)

Flexible photovoltaic devices possess promising perspectives in opto-electronic technologies, where high mobility and/or large-scale applicability are important. However, their usefulness in such applications is currently still limited due to the low level of optimization of their performance and durability. For the improvement of these properties, a better understanding and control of small-scale annihilation phenomena involved in the photovoltaic process, such as exciton loss and charge carrier loss, is necessary, which typically implicates multiple length- and time-scales. Here, we study the causes for their occurrence on the example of nanostructured diblock- and triblock-copolymer systems by making use of a novel solar-cell simulation algorithm and explore new routes to optimize their photovoltaic properties. A particular focus is set on the investigation of exciton and charge carrier loss phenomena and their dependence on the inter-monomeric interaction strength, chain architecture, and external mechanical loading. Our simulation results reveal that in the regime from low up to intermediate ?-parameters an increasing number of continuous percolation paths is created. In this parameter range, the internal quantum efficiency (IQE) increases up to a maximum, characterized by a minimum in the number of charge losses due to charge recombination. In the regime of high ?-parameters both block-copolymer systems form nanostructures with a large number of bottlenecks and dead ends. These lead to a large number of charge losses due to charge recombination, charge trapping, and a deteriorated exciton dissociation, resulting in a significant drop in the IQE. Moreover, we find that the photovoltaic performance of the triblock-copolymer material decreases with increasing mechanical loading, caused by a growing number of charge losses due to charge recombination and charge accumulation. Finally, we demonstrate that the process of charge trapping in defects can be reversed by changing the polarity of the electrodes, which confers these materials the ability to be used as charge storage media.

Donets, Sergii; Pershin, Anton; Christlmaier, Martin J. A.; Baeurle, Stephan A.

2013-03-01

109

Military Curricula for Vocational & Technical Education. Metals Processing Specialist, Blocks V and VI, Classroom Course 13-7.  

ERIC Educational Resources Information Center

These curriculum materials are the third 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 V, Inert Gas Shielded Welding of High…

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

110

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.

111

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.

112

Forming Limit Diagrams of Zircaloy4 and Zirlo Sheets for Stamping Process of Spacer Grids of Nuclear Fuel Rod  

Microsoft Academic Search

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

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

2011-01-01

113

Differential Cognitive and Affective Responses to Flow Diagrams in Science  

ERIC Educational Resources Information Center

Describes a study in which tenth-grade biology students who were low verbal performers scored significantly higher on achievement tests when provided with picture-word diagrams of biological concepts than when provided with block-word diagrams. Students and teachers also preferred picture-word diagrams as indicated by a questionnaire. (MLH)

Holliday, William G.; And Others

1977-01-01

114

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

115

The GONG++ DATA Processing Pipeline F. Hill,, J. Bolding, C. Toner, T. Corbard, S. Wampler, B. Goodrich, J. Goodrich, P. Eliason National Solar Observatory  

E-print Network

.A flow chart/block diagram of the GONG++ data processing pipeline. The square blocks represent analysis flow maps via ring diagrams. Hardware · Sunfire 4800 · Twelve 900-MHz CPUS · 24 GB RAM · Six T3 disk, including subsurface synoptic flow maps, subsurface sunspot flow maps, farside images, tracked and remapped

Corbard, Thierry

116

Semantics of the Domain of Flow Diagrams  

Microsoft Academic Search

A domain of flow diagrams similar to that proposed by Scott, a domain of linear flow diagrams proposed by Goguen et al , a domain of decision table diagrams involving mfimtary branching, and a domain of processes based on the ideas of Milner and Beklc are each provided with a direct semantics, closely related to partial-function semantics, and a continuation

John C. Reynolds

1977-01-01

117

Retrieving Information from Data Flow Diagrams  

Microsoft Academic Search

For reverse engineering, we need tools that can extract information from documents written before routine digital storage was feasible. Documents contain both text and diagrams; data flow diagrams play a prominent role in software documents. Using current techniques, it is possible to recover the information in a data flow diagram by scanning the printed document and processing the data obtained.

Gregory Butler; Peter Grogono; Rajjan Shinghal; Indra A. Tjandra

1995-01-01

118

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

119

Bite-Block Perturbation in People Who Stutter: Immediate Compensatory and Delayed Adaptive Processes  

ERIC Educational Resources Information Center

This exploratory study investigated sensory-motor mechanisms in five people who stutter (PWS) and five people who do not (PNS). Lip kinematic and coordination data were recorded as they produced bi-syllabic nonwords at two rates (normal and fast) in three conditions (jaw-free, immediately after insertion of a bite-block, and after a 10-min…

Namasivayam, Aravind Kumar; van Lieshout, Pascal; De Nil, Luc

2008-01-01

120

Hertzsprung-Russell Diagram  

NSDL National Science Digital Library

Authored by Martin Hackworth of Idaho State University, This lab asks students to construct two Hertzsprung-Russell diagrams, one for the Pleiades Cluster and the other for the Trapezium Cluster. Students should then to be able to recognize the evolution process of all stars depending on their mass. The page features objectives, equipment, discussion, procedure, and exercises. The lesson plan is outlined in an understandable format for translation into almost any curriculum. The resource is available in a pdf format.

Hackworth, Martin

121

Free Body Diagrams  

NSDL National Science Digital Library

This website from the University of Guelph's physics department offers a tutorial on free body diagrams. The tutorial includes an explanation of what free body diagrams are, example problems, a self-test, and a free body diagram java applet.

122

A residual hybrid encoder for image processing  

E-print Network

or transmission. A block diagram of an Image Processor is shown in Fig. 1 [4]. Mapper Quantizer Coder Fig. 1 ? Block Di. agram of Image Processing Model The existing methods of image compression fit into two basic categories: 1) spatial domain, where Pulse...

Beck, John Andrew

1980-01-01

123

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

124

Origin and use of crystallization phase diagrams.  

PubMed

Crystallization phase diagrams are frequently used to conceptualize the phase relations and also the processes taking place during the crystallization of macromolecules. While a great deal of freedom is given in crystallization phase diagrams owing to a lack of specific knowledge about the actual phase boundaries and phase equilibria, crucial fundamental features of phase diagrams can be derived from thermodynamic first principles. Consequently, there are limits to what can be reasonably displayed in a phase diagram, and imagination may start to conflict with thermodynamic realities. Here, the commonly used `crystallization phase diagrams' are derived from thermodynamic excess properties and their limitations and appropriate use is discussed. PMID:25760697

Rupp, Bernhard

2015-03-01

125

Potential lack of "standardized" processing techniques for production of allogeneic and xenogeneic bone blocks for application in humans.  

PubMed

In the present study, the structure of two allogeneic and three xenogeneic bone blocks, which are used in dental and orthopedic surgery, were histologically analyzed. The ultimate goal was to assess whether the components postulated by the manufacturer can be identified after applying conventional histological and histochemical staining techniques. Three samples of each material, i.e. allogeneic material-1 and -2 as well as xenogeneic material-1, -2 and -3, were obtained commercially. After decalcification and standardized embedding processes, conventional histological staining was performed in order to detect inorganic matrix, cellular or organic matrix components. Allogeneic material-1 showed trabecular bone-like structures, which were free of cellular components as well as of organic matrix. The allogeneic material-2 showed trabecular bone structures, in which connective tissue and cellular remnants were embedded. Additionally, some connective tissue, which resembled fat-like tissue, was found within this material. The xenogeneic material-1 showed trabecular bone-like structures and contained organic components comparable to that demonstrated for the allogeneic material-2. The xenogeneic material-2 showed trabecular bone structures with single cells located in lacunae. The xenogeneic material-3 also showed trabecular structures. Neither cellular nor organic matrix components were found within this material. According to the data of the present study, the allogeneic material-1 and the xenogeneic material-3 were the only investigated materials for which the obtained histological data were in accordance with the manufacturer?s advertised information. The remaining three materials showed discrepancies-although the manufacturers of all five bone substitute materials stated that their blocks were free of organic/cellular remnants. These data are of great clinical and material science interest. It seems that even patented processing techniques are not always able to deliver reproducible materials. Although the manufacturers of all five bone blocks stated that their blocks were free of organic/cellular remnants, our histological analysis revealed that three out of five bone blocks did contain such remnants. Such specimens might be able to induce an immune response within the recipient. PMID:24769111

Ghanaati, S; Barbeck, M; Booms, P; Lorenz, J; Kirkpatrick, C J; Sader, R A

2014-08-01

126

Sea-floor character and sedimentary processes of Block Island Sound, offshore Rhode Island  

USGS Publications Warehouse

Gridded multibeam bathymetry covers approximately 634 square kilometers of sea floor in Block Island Sound. Although originally collected for charting purposes during National Oceanic and Atmospheric Administration hydrographic surveys H12009, H12010, H12011, H12015, H12033, H12137, and H12139, these combined acoustic data and the sea-floor sediment sampling and photography stations subsequently occupied to verify them during U.S. Geological Survey cruise 2011-006-FA (1) show the composition and terrain of the seabed, (2) provide information on sediment transport and benthic habitat, and (3) are part of an expanding series of studies that provide a fundamental framework for research and management activities (for example, wind farms and fisheries) along the Rhode Island inner continental shelf.

Poppe, L.J.; Danforth, W.W.; McMullen, K.Y.; Blankenship, M.A.; Glomb, K.A.; Wright, D.B.; Smith, S.M.

2012-01-01

127

The influence of random slowdown process and lock-step effect on the fundamental diagram of the nonlinear pedestrian dynamics: An estimating-correction cellular automaton  

NASA Astrophysics Data System (ADS)

Random slowdown process and lock-step effect, observed from real-life observation and the experiments of other researchers, were investigated in the view of the pedestrian microscopic behaviors. Due to the limited controllability, repeatability and randomness of the pedestrian experiments, a new estimating-correction cellular automaton was established to research the influence of random slowdown process and lock-step effect on the fundamental diagram. The first step of the model is to estimate the next time-step status of the neighbor cell in front of the tracked pedestrian. The second step is to correct the status and confirm the position of the tracked pedestrian in the next time-step. It is found that the random slowdown process and lock-step have significant influence on the curve configuration and the characteristic parameters, including the concavity-convexity, the inflection point, the maximum flow rate and the critical density etc. The random slowdown process reduces the utilization of the available space between two adjacent pedestrians in the longitudinal direction, especially in the region of intermediate density. However, the lock-step effect enhances the utilization of the available space, especially in the region of high density.

Fu, Zhijian; Zhou, Xiaodong; Chen, Yanqiu; Gong, Junhui; Peng, Fei; Yan, Zidan; Zhang, Taolin; Yang, Lizhong

2015-03-01

128

Recording Block Transfer Agreements with PCTIA-Accredited Institutions: Policy and Process  

ERIC Educational Resources Information Center

The purpose of this policy and process document is to provide advice to public and private institutions intending to enter into articulation agreements regarding: (1) Appropriate steps to be taken by each partner to the agreement; (2) Recommended processes for recording and monitoring the agreement; and (3) Circumstances under which agreements…

British Columbia Council on Admissions and Transfer, 2008

2008-01-01

129

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

130

Analysis and Control of Batch Order Picking Processes Considering Picker Blocking  

E-print Network

Order picking operations play a critical role in the order fulfillment process of distribution centers (DCs). Picking a batch of orders is often favored when customers’ demands create a large number of small orders, since the traditional single...

Hong, Soon Do

2011-10-21

131

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

PubMed

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

2011-07-01

132

A PRECISE SEMANTICS FOR VAGUE DIAGRAMS TIM MENZIES,  

E-print Network

) drawn to share expert intuitions in domains like neuroendocrinology (the study of the interaction", "+", "promotes", "-", or "blocks". These diagrams are common (e.g. figure 1). Our neuroendocrinological expert for neuroendocrinology. We say that such

Menzies, Tim

133

Nonverbal Poetry: Family Life-Space Diagrams  

Microsoft Academic Search

The purpose of this article is to examine life-space diagrams as a form of nonverbal poetry. Family life-space diagrams, by their very nature, are a nonverbal blend of lyrical, narrative, and dramatic poetry. The life-space diagram taps personal feelings, tells a story, and characterizes a particular life situation. The human memory process, with its multilevel consciousness, provides the basis for

Donald R. Bardill

2001-01-01

134

A novel algorithm for blending process monitoring of Angong Niuhuang intermediate using vector operation moving block standard deviation  

NASA Astrophysics Data System (ADS)

This study aimed to introduce a novel approach named Vector Operation Moving Block Standard Deviation (VO-MBSD) to characterize the original powder blend uniformity of Angong Nuihuang intermediate using NIR technology, including 400g Rhizoma Coptidis, 400g Radix Scutellariae, 400g Radix Curcumae and 400g Fructus Gardeniae. A novel blending evaluation method named VO-MBSD compared with Moving Block Standard Deviation (MBSD) was applied to characterize the blending of Chinese Materia Medica (CMM) original powder including Rhizoma Coptidis, Radix Scutellariae, Radix Curcumae and Fructus Gardeniae. HPLC (High Performance Liquid Chromatography) analysis demonstrated these observations perfectly. OV-MBSD is the rate of change by time, which not only represents the scalar change but also the vector change. The identification accuracy of blend uniformity and end-point via VO-MBSD was the same with classical HPLC method. This method is more accuracy than original MBSD method. Compared with classical MBSD, it is appropriate for the determination of blending end-point and could be successfully implemented as an on-line monitoring tool for blending process.

Liu, Shanshan; Wu, Zhisheng; Feng, Xin; Ma, Qun; Qiao, Yanjiang

2014-11-01

135

Coating Bores of Light Metal Engine Blocks with a Nanocomposite Material using the Plasma Transferred Wire Arc Thermal Spray Process  

NASA Astrophysics Data System (ADS)

Engine blocks of modern passenger car engines are generally made of light metal alloys, mostly hypoeutectic AlSi-alloys. Due to their low hardness, these alloys do not meet the tribological requirements of the system cylinder running surface—piston rings—lubricating oil. In order to provide a suitable cylinder running surface, nowadays cylinder liners made of gray cast iron are pressed in or cast into the engine block. A newer approach is to apply thermal spray coatings onto the cylinder bore walls. Due to the geometric conditions, the coatings are applied with specifically designed internal diameter thermal spray systems. With these processes a broad variety of feedstock can be applied, whereas mostly low-alloyed carbon steel feedstock is being used for this application. In the context of this work, an iron-based wire feedstock has been developed, which leads to a nanocrystalline coating. The application of this material was carried out with the Plasma Transferred Wire Arc system. AlMgSi0.5 liners were used as substrates. The coating microstructure and the properties of the coatings were analyzed.

Bobzin, K.; Ernst, F.; Zwick, J.; Schlaefer, T.; Cook, D.; Nassenstein, K.; Schwenk, A.; Schreiber, F.; Wenz, T.; Flores, G.; Hahn, M.

2008-09-01

136

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

137

Aesthetics of Class Diagrams  

Microsoft Academic Search

Visualization of object-oriented programs by class dia- grams is a widely used technique. So far no commonly agreed aesthetic criteria have been recorded in order to standardize and measure the quality of class diagrams. In this paper we focus on UML class diagrams, the standard notation for class diagrams in software engineering. We propose some aesthetic criteria which reflect the

Holger Eichelberger

2002-01-01

138

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.

Dexter Perkins

139

Tree Diagrams and Probability  

NSDL National Science Digital Library

This lesson is designed to develop students' ability to create tree diagrams and figure probabilities of events based on those diagrams. This lesson provides links to discussions and activities related to tree diagrams as well as suggested ways to work them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

2011-01-20

140

Processing Effects on Block-Copolymer Based Pressure-Sensitive Adhesives  

Microsoft Academic Search

The goal of this work is to investigate how the variables in the hot-melt coating process affect the microstructure and properties of pressure-sensitive adhesives based on a styrene isoprene styrene triblock copolymer. This polymer is a thermoplastic elastomer, able to be coated at high temperatures and physically crosslinked at lower temperatures. Adhesive tape samples have been made through hot-melt and

A. E. O'Connor; C. W. Macosko

2000-01-01

141

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

2011-12-01

142

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.

143

Simplifying computation of dynamic influence diagrams  

Microsoft Academic Search

Influence diagrams (EDs) are based on Bayesian networks (BNs) and decision theory, and they are powerful tools for representing and processing problems of agents. An approach of decomposition and incorporation is developed to solve problems of multi-agent system based on influence diagrams and dynamic Bayesian networks (DBNs) that is intractable for exact calculation. In additional, we discuss realizing decision of

Hong-Liang Yao; Hao Wang; You-Sheng Zhang; Xue-Gang Hu; Bao-Fu Fang

2004-01-01

144

Extracting Sequence Diagrams from Execution Traces using Interactive Visualization  

E-print Network

. Keywords-reverse engeneering; sequence diagrams; visual- ization; I. INTRODUCTION The reverse engineering automat- ing the reverse-engineering process of sequence diagrams, we propose a semi-automated processExtracting Sequence Diagrams from Execution Traces using Interactive Visualization Hassen Grati

Montréal, Université de

145

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

146

Processing Effects on Block-Copolymer Based Pressure-Sensitive Adhesives  

NASA Astrophysics Data System (ADS)

The goal of this work is to investigate how the variables in the hot-melt coating process affect the microstructure and properties of pressure-sensitive adhesives based on a styrene isoprene styrene triblock copolymer. This polymer is a thermoplastic elastomer, able to be coated at high temperatures and physically crosslinked at lower temperatures. Adhesive tape samples have been made through hot-melt and solvent coating methods. Hot-melt coatings are prepared at speeds up to 110 feet/minute. Materials with the same thermal history have been coated using both methods and then tested for comparison of properties. PSA properties are strongly dependent on the time scale of application and debonding, as revealed by shear rheology data, and three types of performance tests (tack, peel, and shear holding power) are used to capture the various responses. Solvent-coated tape has superior shear strength, while hot-melt-coated tape performs better in peel tests. It is expected that the varying flow and deformation histories of the samples will lead to distinct chain orientations, while the rate of cooling of hot-melt-coated samples may influence the degree of phase separation achieved. These factors will cause the adhesive coatings to have different microstructures and therefore different properties.

O'Connor, A. E.; Macosko, C. W.

2000-03-01

147

Implementation of a knowledge-based methodology in a decision support system for the design of suitable wastewater treatment process flow diagrams.  

PubMed

In light of rapid global change, the demand for wastewater treatment is increasing rapidly and will continue to do so in the near future. Wastewater management is a complex puzzle for which the proper pieces must be combined to achieve the desired solution, requiring the simultaneous consideration of technical, economic, social and environmental issues. In this context, a knowledge-based methodology (KBM) for the conceptual design of wastewater treatment plant (WWTP) process flow diagrams (PFDs) and its application for two scenarios is presented in this paper. The core of the KBM is composed of two knowledge bases (KBs). The first, a specification knowledge base (S-KB), summarizes the main features of the different treatment technologies: pollutants removal efficiency, operational costs and technical reliability. The second, a compatibility knowledge base (C-KB), contains information about the different interactions amongst the treatment technologies and determines their degree of compatibility. The proposed methodology is based on a decision hierarchy that uses the information contained in both KBs to generate all possible WWTP configurations, screening and selecting appropriate configurations based on user-specified requirements and scenario characteristics. The design of the most adequate treatment train for small and medium sized wastewater treatment plants (2000 and 50,000 p.e. respectively) according to different restrictions (space constraints, operation simplicity and cost optimization) was the example in order to show the usefulness of the KBM. PMID:22982697

Garrido-Baserba, Manel; Reif, Rubén; Hernández, Francesc; Poch, Manel

2012-12-15

148

Energy Efficient Heat Treatment for Linerless Hypereutectic Al-Si Engine Blocks Made Using Vacuum HPDC Process  

NASA Astrophysics Data System (ADS)

Heat treatment standards developed by the aluminum industry over the last several decades are often not well optimized when applied to components cast by high cooling rate processes such as High Pressure Die Casting (HPDC), Low Pressure Permanent Mold (LPPM), Squeeze Casting, etc. The inherently finer as-cast structures should not require long solution times for the effective dissolution of intermetallic phases and the adequate thermal modification of structural constituents. Hence, long and expensive T6 and T7 treatments should not be required. Heat treatment studies involving as-cast laboratory samples with SDAS = 13.6 ?m (equivalent to a thick-section HPDC casting) were conducted. Traditional and modified solution and aging treatments were compared. These studies suggest that a reduction of up to 92% in thermal processing time is possible while maintaining and/or improving the cast component's metallurgical characteristics including hardness (?75 HRB), dissolution of secondary phases, and spheroidization of the eutectic Si as well as overall homogeneity. Vacuum HPDC of an actual hypereutectic Al-20%Si motorcycle engine block confirmed the potential for significantly reduced heat treatment times, energy consumption, and overall costs.

Kasprzak, W.; Sokolowski, J. H.; Yamagata, H.; Aniolek, M.; Kurita, H.

2011-02-01

149

Predicting process windows for pattern density multiplication using block copolymer directed self-assembly in conjunction with chemoepitaxial guiding layers  

NASA Astrophysics Data System (ADS)

Pattern density multiplication using directed self-assembly (DSA) of block copolymers (BCPs) is a technique capable of producing patterns with small pitches utilizing guiding template patterns printed as larger feature sizes and pitches. One method for achieving this density multiplication is to utilize chemoepitaxy based on a guiding underlayer that is nominally topographically flat but which is composed of a pinning region, or stripe if referring to lamellae, which will chemically prefer one microphase of the BCP, as well as a second region that is often referred to as "neutral" to both phases of the BCP. In most conceptions of such a chemoepitaxial approach for alignment of lamellae patterns, the pinning stripe is typically the width of a single lamellae of the phase separated BCP, while the neutral stripe is some odd number of lamellae widths. In this work, detailed simulation studies have been performed to elucidate the effects of variables such as guiding stripe size, chemical composition of the neutral stripes, and small topography on the process window of DSA pitch sub-division patterning processes. A simple but novel technique has been developed and utilized to quantify the level of alignment of a simulated BCP film to an underlying guiding pattern. Such process windows and lithographic parameters have been studied for different pitch sub-division conditions including 1:3 and 1:5 pinning stripe:neutral stripe width ratios. It is found that the center of the processing window occurs at a composition of the "neutral stripe" such that it is slightly to somewhat strongly preferential to the type of polymer of opposite type to that attracted by the pinning stripe, and that this ideal "neutral stripe" composition becomes more neutral as the density multiplication increases.

Nation, Benjamin D.; Peters, Andrew; Lawson, Richard A.; Ludovice, Peter J.; Henderson, Clifford L.

2014-03-01

150

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

151

Population Blocks.  

ERIC Educational Resources Information Center

Describes an educational game called "Population Blocks" that is designed to illustrate the concept of exponential growth of the human population and some potential effects of overpopulation. The game material consists of wooden blocks; 18 blocks are painted green (representing land), 7 are painted blue (representing water); and the remaining…

Smith, Martin H.

1992-01-01

152

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

153

PHASE DIAGRAMS Phase Rule  

E-print Network

diagram demarcates regions of existence of various phases. This is similar to a map which demarcates regions based on political, geographical, ecological etc. criteria. Phase diagrams are maps* Thorough) are extensively used in materials science and will be considered in detail in this chapter. Also, we shall

Subramaniam, Anandh

154

Xilinx State Diagram  

E-print Network

Xilinx State Diagram Tutorial Department of Electrical and Computer Engineering State University of New York ­ New Paltz © Fall 2006 Baback Izadi #12;Start a new Project Next. #12;This opens the New Project Dialog box. Click on New Source. Select State Diagram and give

Izadi, Baback

155

Automatic Code Generation From UML Class and Statechart Diagrams  

E-print Network

of the classes is represented by a set of statechart diagrams. To facilitate the software development processAutomatic Code Generation From UML Class and Statechart Diagrams Graduate School of Systems From UML Class and Statechart Diagrams Iftikhar Azim Niaz November 2005 A dissertation submitted

Tanaka, Jiro

156

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.

Dewey M. McLean

157

Online Diagnosis Using Influence Diagrams  

Microsoft Academic Search

\\u000a This paper presents the utilization of influence diagrams in the diagnosis of industrial processes. The diagnosis in this\\u000a context signifies the early detection of abnormal behavior, and the selection of the best recommendation for the operator\\u000a in order to correct the problem or minimize the effects. A software architecture is presented, based on the Elvira package, including the connection with

Baldramino Morales Sánchez; Pablo H. Ibargüengoytia

2004-01-01

158

Transformation from Data Flow Diagram to UML2.0 activity diagram  

Microsoft Academic Search

Model transformations are frequently applied in business process modeling to bridge between languages on a different level of abstraction and formality This paper proposes a model transformation from Data Flow Diagrams (DFD) which have been used widely in structure requirement analysis phase to UML Activity Diagrams (UML-AD) which have been used widely in various phases of Object Oriented Development Method.

Fanchao Meng; Dianhui Chu; Dechen Zhan

2010-01-01

159

Heterochromatin Blocks Constituting the Entire Short Arms of Acrocentric Chromosomes of Azara's Owl Monkey: Formation Processes Inferred From Chromosomal Locations  

PubMed Central

Centromeres and telomeres of higher eukaryotes generally contain repetitive sequences, which often form pericentric or subtelomeric heterochromatin blocks. C-banding analysis of chromosomes of Azara's owl monkey, a primate species, showed that the short arms of acrocentric chromosomes consist mostly or solely of constitutive heterochromatin. The purpose of the present study was to determine which category, pericentric, or subtelomeric is most appropriate for this heterochromatin, and to infer its formation processes. We cloned and sequenced its DNA component, finding it to be a tandem repeat sequence comprising 187-bp repeat units, which we named OwlRep. Subsequent hybridization analyses revealed that OwlRep resides in the pericentric regions of a small number of metacentric chromosomes, in addition to the short arms of acrocentric chromosomes. Further, in the pericentric regions of the acrocentric chromosomes, OwlRep was observed on the short-arm side only. This distribution pattern of OwlRep among chromosomes can be simply and sufficiently explained by assuming (i) OwlRep was transferred from chromosome to chromosome by the interaction of pericentric heterochromatin, and (ii) it was amplified there as subtelomeric heterochromatin. OwlRep carries several direct and inverted repeats within its repeat units. This complex structure may lead to a higher frequency of chromosome scission and may thus be a factor in the unique distribution pattern among chromosomes. Neither OwlRep nor similar sequences were found in the genomes of the other New World monkey species we examined, suggesting that OwlRep underwent rapid amplification after the divergence of the owl monkey lineage from lineages of the other species. PMID:23761219

Prakhongcheep, Ornjira; Chaiprasertsri, Nampech; Terada, Shoko; Hirai, Yuriko; Srikulnath, Kornsorn; Hirai, Hirohisa; Koga, Akihiko

2013-01-01

160

The geometry of polynomial diagrams  

E-print Network

In this paper we introduce the concept of polynomial diagrams and its area for special polynomials.We study the properties of polynomial area diagrams. The formula for the area of an arbitrary polynomial diagram.

Maksim Alennikov

2015-02-18

161

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.

Dr. Charles Ward

162

Satellite Venn Diagram  

NSDL National Science Digital Library

In this activity, students will use the background information they have read to organize a list of sources and objects, putting each item given in the appropriate part of the Venn diagram, depending on which instrument will study that item. Students will demonstrate their understanding of spectra, astronomical observations, and have read the background material on Chandra, Astro-E and the microcalorimeter, and the Constellation X-ray Observatory. They will write a five minute summary of the capabilities of the three observatories, based on their Venn diagram. Students' understanding of the background material will be evaluated based on the accuracy of their Venn diagrams and the interpretation of the information on the Venn diagrams from their closure paper.

163

Weyl Card Diagrams  

E-print Network

To capture important physical properties of a spacetime we construct a new diagram, the card diagram, which accurately draws generalized Weyl spacetimes in arbitrary dimensions by encoding their global spacetime structure, singularities, horizons, and some aspects of causal structure including null infinity. Card diagrams draw only non-trivial directions providing a clearer picture of the geometric features of spacetimes as compared to Penrose diagrams, and can change continuously as a function of the geometric parameters. One of our main results is to describe how Weyl rods are traversable horizons and the entirety of the spacetime can be mapped out. We review Weyl techniques and as examples we systematically discuss properties of a variety of solutions including Kerr-Newman black holes, black rings, expanding bubbles, and recent spacelike-brane solutions. Families of solutions will share qualitatively similar cards. In addition we show how card diagrams not only capture information about a geometry but also its analytic continuations by providing a geometric picture of analytic continuation. Weyl techniques are generalized to higher dimensional charged solutions and applied to generate perturbations of bubble and S-brane solutions by Israel-Khan rods. This paper is a condensed and simplified presentation of the card diagrams in hep-th/0409070.

Gregory C. Jones; John E. Wang

2005-06-02

164

Ionic Blocks  

ERIC Educational Resources Information Center

"Ionic Blocks" is a teaching tool designed to help middle school students visualize the concepts of ions, ionic compounds, and stoichiometry. It can also assist high school students in reviewing their subject mastery. Three dimensional blocks are used to represent cations and anions, with color indicating charge (positive or negative) and size…

Sevcik, Richard S.; Gamble, Rex; Martinez, Elizabet; Schultz, Linda D.; Alexander, Susan V.

2008-01-01

165

Bifurcation diagram globally underpinning neuronal firing behaviors modified by SK conductance  

NASA Astrophysics Data System (ADS)

Neurons in the brain utilize various firing trains to encode the input signals they have received. Firing behavior of one single neuron is thoroughly explained by using a bifurcation diagram from polarized resting to firing, and then to depolarized resting. This explanation provides an important theoretical principle for understanding neuronal biophysical behaviors. This paper reports the novel experimental and modeling results of the modification of such a bifurcation diagram by adjusting small conductance potassium (SK) channel. In experiments, changes in excitability and depolarization block in nucleus accumbens shell and medium-spiny projection neurons are explored by increasing the intensity of injected current and blocking the SK channels by apamin. A shift of bifurcation points is observed. Then, a Hodgkin—Huxley type model including the main electrophysiological processes of such neurons is developed to reproduce the experimental results. The reduction of SK channel conductance also shifts the bifurcations, which is in consistence with experiment. A global bifurcation paradigm of this shift is obtained by adjusting two parameters, intensity of injected current and SK channel conductance. This work reveals the dynamics underpinning modulation of neuronal firing behaviors by biologically important ionic conductance. The results indicate that small ionic conductance other than that responsible for spike generation can modify bifurcation points and shift the bifurcation diagram and, thus, change neuronal excitability and adaptation.

Chen, Meng-Jiao; Ling, Heng-Li; Liu, Yi-Hui; Qu, Shi-Xian; Ren, Wei

2014-02-01

166

Weyl card diagrams  

SciTech Connect

To capture important physical properties of a spacetime we construct a new diagram, the card diagram, which accurately draws generalized Weyl spacetimes in arbitrary dimensions by encoding their global spacetime structure, singularities, horizons, and some aspects of causal structure including null infinity. Card diagrams draw only nontrivial directions providing a clearer picture of the geometric features of spacetimes as compared to Penrose diagrams, and can change continuously as a function of the geometric parameters. One of our main results is to describe how Weyl rods are traversable horizons and the entirety of the spacetime can be mapped out. We review Weyl techniques and as examples we systematically discuss properties of a variety of solutions including Kerr-Newman black holes, black rings, expanding bubbles, and recent spacelike-brane solutions. Families of solutions will share qualitatively similar cards. In addition we show how card diagrams not only capture information about a geometry but also its analytic continuations by providing a geometric picture of analytic continuation. Weyl techniques are generalized to higher dimensional charged solutions and applied to generate perturbations of bubble and S-brane solutions by Israel-Khan rods.

Jones, Gregory [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States); Wang, John E. [Department of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States); Department of Physics, National Taiwan University, Taipei 106, Taiwan (China); National Center for Theoretical Sciences, Taiwan, National Taiwan University, Taipei 10617, Taiwan (China)

2005-06-15

167

A 256Kb Dual-VCC SRAM Building Block in 65-nm CMOS Process With Actively Clamped Sleep Transistor  

Microsoft Academic Search

This paper addresses the stability problem of SRAM cells used in dense last level caches (LLCs). In order for the LLC not to limit the minimum voltage at which a processor core can run, a dual-VCC 256-Kb SRAM building block is proposed. A fixed high-voltage supply powers the cache which allows the use of the smallest SRAM cell for maximum

Muhammad Khellah; Dinesh Somasekhar; Yibin Ye; Nam Sung Kim; Jason Howard; Greg Ruhl; Murad Sunna; James Tschanz; Nitin Borkar; Fatih Hamzaoglu; Gunjan Pandya; Ali Farhang; Kevin Zhang; Vivek De

2007-01-01

168

Nerve Blocks  

MedlinePLUS

... doctor. By performing a nerve block and then monitoring how the patient responds to the injection, the ... and/or imaging guidance. He or she will clean the area with antiseptic solution, and then the ...

169

Earth Observing System (EOS)/Advanced Microwave Sounding Unit-A (AMSU-A): Instrument logic diagrams  

NASA Technical Reports Server (NTRS)

This report contains all of the block diagrams and internal logic diagrams for the Earth Observation System Advanced Microwave Sounding Unit-A (AMSU-A). These diagrams show the signal inputs, outputs, and internal signal flow for the AMSU-A.

1994-01-01

170

Endpoint-based parallel data processing with non-blocking collective instructions in a parallel active messaging interface of a parallel computer  

DOEpatents

Methods, apparatuses, and computer program products for endpoint-based parallel data processing with non-blocking collective instructions in a parallel active messaging interface (`PAMI`) of a parallel computer are provided. Embodiments include establishing by a parallel application a data communications geometry, the geometry specifying a set of endpoints that are used in collective operations of the PAMI, including associating with the geometry a list of collective algorithms valid for use with the endpoints of the geometry. Embodiments also include registering in each endpoint in the geometry a dispatch callback function for a collective operation and executing without blocking, through a single one of the endpoints in the geometry, an instruction for the collective operation.

Archer, Charles J; Blocksome, Michael A; Cernohous, Bob R; Ratterman, Joseph D; Smith, Brian E

2014-11-18

171

Endpoint-based parallel data processing with non-blocking collective instructions in a parallel active messaging interface of a parallel computer  

DOEpatents

Endpoint-based parallel data processing with non-blocking collective instructions in a PAMI of a parallel computer is disclosed. The PAMI is composed of data communications endpoints, each including a specification of data communications parameters for a thread of execution on a compute node, including specifications of a client, a context, and a task. The compute nodes are coupled for data communications through the PAMI. The parallel application establishes a data communications geometry specifying a set of endpoints that are used in collective operations of the PAMI by associating with the geometry a list of collective algorithms valid for use with the endpoints of the geometry; registering in each endpoint in the geometry a dispatch callback function for a collective operation; and executing without blocking, through a single one of the endpoints in the geometry, an instruction for the collective operation.

Archer, Charles J; Blocksome, Michael A; Cernohous, Bob R; Ratterman, Joseph D; Smith, Brian E

2014-11-11

172

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.

173

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

174

Plagioclase Phase Diagram  

NSDL National Science Digital Library

This is a short exercise aimed at evaluating whether students understand how to interpret the Ab-An phase diagram. If students know what is going on, it takes about 10 minutes to complete. This active learning exercise makes a good break from lecture. It is best done as a group activity.

Dexter Perkins

175

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

176

OPTIMAL PARENTHESIZATION OF LEXICAL ORDERINGS FOR DSP BLOCK DIAGRAMS1  

E-print Network

Projects Agency and the U. S. Air Force (under the RASSP program, contract F33615-93-C-1317), Semiconductor for program and data are critical objectives when synthesizing software for embedded DSP applications. Previously, it has been demon- strated that for graphical programs based on the widely-used synchronous

Bhattacharyya, Shuvra S.

177

A new Approach for Absolute Paleointensity Determination: Consideration on Blocking Processes Between Temperature and Interaction-Field  

NASA Astrophysics Data System (ADS)

Numerous paleomagnetic studies showed that only rarely the magnetic carriers in rocks are pure non- interacting single-domain (SD) grains. In most cases, samples contain mixture of pseudo-single domain (PSD), multidomain (MD), and/or SD particles with strong magnetic grain/or domain interactions. Our recent investigations indicate that magnetostatic interactions within magnetic particles can seriously affect the properties of thermal remanent magnetization (TRM) and generate non-ideal behavior for the Thellier-Coe paleointensity experiment. Here we present a new method for absolute paleointensity determination for the case where magnetostatic interactions among particles generally exist. We demonstrate that, with the presence of strong magnetostatic interactions, grain's unblocking temperature (Tub) will not equal to its blocking temperature (Tb). Significant viscous effect will also exist, that is, TRM will be blocked or unblocked more at slower cooling or heating rate. At the temperature that is higher than the ideal maximum Tub of an assemblage of clustered SD particles, the interacting field will disappear statistically, the particles will be reset, and acquire a completely magnetized TRM (CM_TRM) during successively cooling, which is identical to the total TRM (cooled from Curie temperature to room temperature). This is the crucial point of our new experimental method for paleointensity determination: we compare the unblocking temperature spectra of the CM_TRM part of an artificial TRM with that of natural remanent magnetization (NRM) to estimate paleointensity, rather than comparing the unblocking spectra of NRM with blocking spectra of progressive artificial TRM, which is used in the traditional Thellier-Coe method. The premise of our new method is that, if the unblocking spectra of CM_TRM of an artificial TRM can be obtained before significant laboratory physicochemical alteration occurs, a reliable paleointensity can be extracted from samples, even for those samples that contain PSD and MD grains. To illustrate these characteristics and validate our method, we have conducted detailed experiments on several representative artificial magnetite samples and will present these results at the meeting.

Zheng, Z.; Zhao, X.

2006-12-01

178

17. (MICROFILM ORIGINAL): WISCONSIN STATE HIGHWAY COMMISSION DIAGRAM M374. 'STEEL ...  

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

17. (MICROFILM ORIGINAL): WISCONSIN STATE HIGHWAY COMMISSION DIAGRAM M374. 'STEEL HIGHWAY BRIDGE WITH WOOD BLOCK FLOOR. 8-26-14.' - Hemlock Bridge, Spanning Black River on Warner Drive, Greenwood, Clark County, WI

179

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

Federal Register 2010, 2011, 2012, 2013, 2014

...DEPARTMENT OF THE INTERIOR Bureau of Ocean Energy Management, Regulation and Enforcement Outer Continental Shelf...Shelf Block Diagrams AGENCY: Bureau of Ocean Energy Management, Regulation and Enforcement (BOEMRE),...

2011-01-18

180

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.

Stu Cork

2014-01-01

181

Effects of temperature, packaging and electron beam irradiation processing conditions on the property behaviour of Poly (ether-block-amide) blends.  

PubMed

The radiation stability of Poly (ether-block-amide) (PEBA) blended with a multifunctional phenolic antioxidant and a hindered amide light stabiliser was examined under various temperatures, packaging and electron beam processing conditions. FTIR revealed that there were slight alterations to the PEBA before irradiation; however, these became more pronounced following irradiation. The effect of varying the temperature, packaging and processing conditions on the resultant PEBA properties was apparent. For example, rheology demonstrated that the structural properties could be enhanced by manipulating the aforementioned criteria. Mechanical testing exhibited less radiation resistance when the PEBA samples were vacuum packed and exposed to irradiation. MFI and AFM confirmed that the melting strength and surface topography could be reduced/increased depending on the conditions employed. From this study it was concluded that virgin PEBA submerged in dry ice with non-vacuum packaging during the irradiation process, provided excellent radiation resistance (20.9% improvement) in contrast to the traditional method. PMID:24863239

Murray, Kieran A; Kennedy, James E; McEvoy, Brian; Vrain, Olivier; Ryan, Damien; Cowman, Richard; Higginbotham, Clement L

2014-06-01

182

On the Transformation of Control Flow between Block-Oriented and Graph-Oriented Process Modeling Languages  

Microsoft Academic Search

Much recent research work discusses the transformation between difier- ent process modeling languages. This work, however, is mainly focussed on speciflc process modeling languages, and thus the general reusability of the applied transfor- mation concepts is rather limited. In this article, we aim to abstract from concrete transformations by distinguishing two major paradigms for representing control ?ow in process modeling

Jan Mendling; Kristian Bisgaard Lassen; Uwe Zdun

183

Linking diagrams for free  

E-print Network

Linking diagrams with path composition are ubiquitous, for example: Temperley-Lieb and Brauer monoids, Kelly-Laplaza graphs for compact closed categories, and Girard's multiplicative proof nets. We construct the category Link=Span(iRel), where iRel is the category of injective relations (reversed partial functions) and show that the aforementioned linkings, as well as Jones-Martin partition monoids, reside inside Link. Path composition, including collection of loops, is by pullback. Link contains the free compact closed category on a self-dual object (hence also the looped Brauer and Temperly-Lieb monoids), and generalises partition monoids with partiality (vertices in no partition) and empty- and infinite partitions. Thus we obtain conventional linking/partition diagrams and their composition "for free", from iRel.

Dominic J. D. Hughes

2008-05-11

184

UML class diagram metrics tool  

Microsoft Academic Search

Many of the object-oriented (OO) metrics that have been proposed over the last decade can be applied to measure internal quality attributes of class diagrams. This paper describes a tool that automates the computation of the important metrics that are applicable to the UML class diagrams. The tool collects information by parsing the XMI format of the class diagram to

Moheb R. Girgis; T. M. Mahmoud; Rehab R. Nour

2009-01-01

185

On web diagrams Jun Murakami  

E-print Network

On web diagrams Jun Murakami Department of Mathematics, Graduate School of Science, Osaka­ tive invariant is defined in the space of web diagrams, and it includes the Casson­ Walker invariant of the mapping class groups. (cf. [9], [10]) 2. Web space 2.1. Web diagram. To explain the universal perturbative

186

Modeling Yin-Yang balance in tai-chi diagram with a melting-freezing rotating device part 3 — The contemporary tai-chi diagram, the yuan-chi diagram and the Fu Xi's eight trigrams  

NASA Astrophysics Data System (ADS)

The physical model describing the Yin-Yang balance in the tai-chi diagram via the melting and freezing processes in a rotating device presented in parts 1 and 2 is further developed for the contemporary tai-chi diagram and in the yuan-chi diagram. The contemporary tai-chi diagram shown in Fig.1 is a simplification form of the ancient tai-chi diagram presented in Reference [2]. There are two semi-circles forming the interface curve between the yin and yang in the contemporary tai-chi diagram. By knowing the location of the interface between the yin and yang in the contemporary tai-chi diagram, the requirement for the simulation model is to find the condition to match the interface location. The simplification changes not only the structure but also the physical insight of the ancient tai-chi diagram, which will be described in the present study. The yuan-chi diagram shown in Fig.2 is the combination of the Master Chen’s tai-chi diagram presented in References [1,2] and the contemporary tai-chi diagram. The formulation of the yuan-chi diagram is similar to that of contemporary tai-chi diagram. The Fu Xi’s eight trigrams present three levels of yin-yang relation that are a natural result from the contemporary tai-chi diagram, which will be described in the last part of this study.

Lin, Sui; Chen, Tzu-Fang

2002-11-01

187

Superalloy Lattice Block Structures  

NASA Technical Reports Server (NTRS)

In their simplest form, lattice block panels are produced by direct casting and result in lightweight, fully triangulated truss-like configurations which provide strength and stiffness [2]. The earliest realizations of lattice block were made from A1 and steels, primarily under funding from the US Navy [3]. This work also showed that the mechanical efficiency (eg., specific stiffness) of lattice block structures approached that of honeycomb structures [2]. The lattice architectures are also less anisotropic, and the investment casting route should provide a large advantage in cost and temperature capability over honeycombs which are limited to alloys that can be processed into foils. Based on this early work, a program was initiated to determine the feasibility of extending the high temperature superalloy lattice block [3]. The objective of this effort was to provide an alternative to intermetallics and composites in achieving a lightweight high temperature structure without sacrificing the damage tolerance and moderate cost inherent in superalloys. To establish the feasibility of the superalloy lattice block concept, work was performed in conjunction with JAMCORP, Inc. Billerica, MA, to produce a number of lattice block panels from both IN71 8 and Mar-M247.

Whittenberger, J. D.; Nathal, M. V.; Hebsur, M. G.; Kraus, D. L.

2003-01-01

188

On Earthquake Predictability Measurement: Information Score and Error Diagram  

NASA Astrophysics Data System (ADS)

We discuss two methods for measuring the effectiveness of earthquake prediction algorithms: The information score based on the likelihood ratio and error diagrams. For both of these methods, closed form expressions are obtained for the renewal process based on the gamma and lognormal distributions. The error diagram is more informative than the likelihood ratio and uniquely specifies the information score. We derive an expression connecting the information score and error diagrams. We then obtain the estimate of the region bounds in the error diagram for any value of the information score. We discuss how these preliminary results can be extended for more realistic models of earthquake occurrence.

Kagan, Yan Y.

2007-10-01

189

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

190

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

191

Removing Redundancies and Deducing Equivalences in UML Class Diagrams  

E-print Network

TesterComputerTester 0..* 2 Evaluation EngineTransmission Feasible-Model (b) A tight class diagram, equivalent to FigRemoving Redundancies and Deducing Equivalences in UML Class Diagrams Azzam Maraee1,2 and Mira. The emerging Model-driven Engineering approach puts mod- els at the heart of the software development process

Balaban, Mira

192

Automatic layout of UML class diagrams in orthogonal style  

Microsoft Academic Search

Unified modelling language (UML) diagrams have become increasingly important in engineering and re-engineering processes for software systems. Of particular interest are UML class diagrams whose purpose is to display generalizations, associations, aggregations, and compositions in one picture. The combination of directed and undirected relations poses a special challenge to a graph layout tool. Current approaches for the automatic layout of

Markus Eiglsperger; Carsten Gutwenger; Michael Kaufmann; Joachim Kupke; Michael Jünger; Sebastian Leipert; Karsten Klein; Petra Mutzel; Martin Siebenhaller

2004-01-01

193

Data flow diagrams: reverse engineering production and animation  

Microsoft Academic Search

The authors propose the use of interactive animation techniques as a support to reverse engineering processes oriented to the synthesis of semantic abstractions. Starting from data flow diagrams, a formal model, called dynamic data flow diagrams (DDFDs), has been defined, which can be used for the production of executable models of a software system. A strategy for the DDFD interactive

G. Canfora; L. Sansone; G. Visaggio

1992-01-01

194

Automated Analysis of Doppler Ultrasound Velocity Flow Diagrams  

Microsoft Academic Search

A highly automated method for the identification and quantization of maximum blood velocity curves from Doppler ultrasound flow diagrams is presented. The method uses an image processing scheme to analyze video-recorded image sequences of flow diagrams. The sequences are acquired, a sequence of images relating to chronological cardiac cycles is extracted, and a maximum blood velocity envelope is determined and

Juerg Tschirren; Ronald M. Lauer; Milan Sonka

2001-01-01

195

Formal semantics for SA style data flow diagram specification languages  

Microsoft Academic Search

Using operational semantic techniques, we present a formal semantics for an extended variant of structured analysis style data flow diagrams. This semantics is intended to serve as a semantic foundation for many different specification languages that specify concurrent systems using a graphical notation similar to data flow diagrams. Besides allowing one to specify how information is processed, it allows one

Gary T. Leavens; Tim Wahls; Albert L. Baker

1999-01-01

196

Benzyloxycarbonyl-Val-Ala-Asp (OMe) fluoromethylketone (Z-VAD.FMK) inhibits apoptosis by blocking the processing of CPP32.  

PubMed Central

Interleukin-1 beta converting enzyme (ICE)-like proteases, which are synthesized as inactive precursors, play a key role in the induction of apoptosis. We now demonstrate that benzyloxycarbonyl-Val-Ala-Asp (OMe) fluoromethylketone (Z-VAD.FMK), an ICE-like protease inhibitor, inhibits apoptosis by preventing the processing of CPP32 to its active form. These results suggest that novel inhibitors of apoptosis can be developed which prevent processing of proforms of ICE-like proteases. PMID:8670109

Slee, E A; Zhu, H; Chow, S C; MacFarlane, M; Nicholson, D W; Cohen, G M

1996-01-01

197

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

2015-02-01

198

Ecohydrological Processes in Cutover Peatlands: The Impact of Peatland Restoration (Rewetting) on the Site Hydrology and Water Balance of an Abandoned Block-cut bog in Quebec  

NASA Astrophysics Data System (ADS)

Artificial drainage networks established throughout peatlands during the peat extraction process often remain active following abandonment, maintaining a water table relatively far from the surface of the peat and hindering the survival and reestablishment of Sphagnum mosses. In an effort to restore a suitable hydrological regime, the primary drainage network of an abandoned cutover peatland (the Cacouna bog) was blocked with a series of peat dams, resulting in a site-averaged water table rise of 32 cm. The components of the water balance and site hydrology were monitored over three consecutive study periods (2005-2006 prior to rewetting; 2007 following rewetting), permitting quantification of the altered hydrologic conditions due to rewetting. Following ditch blocking, runoff was reduced from 23 to 10% of precipitation during the 2005/2006 (two-year average) and 2007 seasons, respectively. The higher water table and blocked drainage network resulted in increased runoff variability, dependant upon antecedent conditions (capacity to retain additional water on-site) and event-based precipitation dynamics. Evapotranspiration (ET) remained the major water loss from the site in each year, comprising 91, 77 and 91% of total outputs during the 2005, 2006 and 2007 seasons, respectively. ET rates were 25% higher in 2007 following rewetting (3.6 mm/day), compared to pre-restoration ET rates of 2.7 mm/day during both the 2005 and 2006 study periods. Storage changes were restricted following rewetting, due to reduced runoff losses limiting water table drawdown, thereby constraining peat compression and preventing undue drying of the unsaturated zone. An average surface level rebound of 3 cm was observed, increasing the mean hydraulic conductivity by an order of magnitude. There is a need to understand the impact of site rewetting on the system hydrology, to facilitate a timely return to a functioning ecohydrological state following disturbance. The intention of this presentation is to provide an overview of the hydrological regime prior to, and following, rewetting.

Ketcheson, S. J.; Price, J. S.

2009-05-01

199

Warped penguin diagrams  

SciTech Connect

We present an analysis of the loop-induced magnetic dipole operator in the Randall-Sundrum model of a warped extra dimension with anarchic bulk fermions and an IR brane-localized Higgs. These operators are finite at one-loop order and we explicitly calculate the branching ratio for {mu}{yields}e{gamma} using the mixed position/momentum space formalism. The particular bound on the anarchic Yukawa and Kaluza-Klein (KK) scales can depend on the flavor structure of the anarchic matrices. It is possible for a generic model to either be ruled out or unaffected by these bounds without any fine-tuning. We quantify how these models realize this surprising behavior. We also review tree-level lepton flavor bounds in these models and show that these are on the verge of tension with the {mu}{yields}e{gamma} bounds from typical models with a 3 TeV Kaluza-Klein scale. Further, we illuminate the nature of the one-loop finiteness of these diagrams and show how to accurately determine the degree of divergence of a five-dimensional loop diagram using both the five-dimensional and KK formalism. This power counting can be obfuscated in the four-dimensional Kaluza-Klein formalism and we explicitly point out subtleties that ensure that the two formalisms agree. Finally, we remark on the existence of a perturbative regime in which these one-loop results give the dominant contribution.

Csaki, Csaba; Grossman, Yuval; Tanedo, Philip; Tsai, Yuhsin [Institute for High Energy Phenomenology, Newman Laboratory of Elementary Particle Physics, Cornell University, Ithaca, New York 14853 (United States)

2011-04-01

200

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

201

Argument Diagramming: The Araucaria Project  

NASA Astrophysics Data System (ADS)

Formal arguments, such as those used in science, medicine and law to establish a conclusion by providing supporting evidence, are frequently represented by diagrams such as trees and graphs. We describe the software package Araucaria which allows textual arguments to be marked up and represented as standard, Toulmin or Wigmore diagrams. Since each of these diagramming techniques was devised for a particular domain or argumentation, we discuss some of the issues involved in translating between diagrams. The exercise of translating between different diagramming types illustrates that any one diagramming system often cannot capture all of the nuances inherent in an argument. Finally, we describe some areas, such as critical thinking courses in colleges and universities and the analysis of evidence in court cases, where Araucaria has been put to practical use.

Rowe, Glenn; Reed, Chris

202

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

203

Antibodies that Inhibit Malaria Merozoite Surface Protein1 Processing and Erythrocyte Invasion Are Blocked by Naturally Acquired Human Antibodies  

Microsoft Academic Search

Summary Merozoite surface protein-1 (MSP-1) of the human malaria parasite Plasmodium falciparum un- dergoes at least two endoproteolytic cleavage events during merozoite maturation and release, and erythrocyte invasion. We have previously demonstrated that mAbs which inhibit erythro- cyte invasion and are specific for epitopes within a membrane-proximal, COOH-terminal do- main of MSP-1 (MSP-1 19 ) prevent the critical secondary processing

José A. Guevara Patiño; Anthony A. Holder; Jana S. McBride; Michael J. Blackman

204

Generating function for web diagrams  

E-print Network

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.

A. A. Vladimirov

2014-09-06

205

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

206

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

207

Physiology Flow-Diagram Models  

NSDL National Science Digital Library

A set of physiology flow-diagrams for the cardiovascular system, cardiac auto-rhythmic cell, cardiac contractile cell, respiratory system, coagulation/hemostasis, digestive system, excretion, and autonomic nervous system. These flow-diagrams show cause-and-effect markup and have accompanying tutorials.

PhD Sandra J Bruner (Polk Community College Biology)

2005-10-04

208

Perturbations to the Hubble diagram  

E-print Network

We compute the linear responses of the Hubble diagram to small scalar perturbations in the Robertson-Walker metric and to small peculiar velocities of emitter and receiver. We discuss the monotonicity constraint of the Hubble diagram in the light of these responses.

Thomas Schucker; Ilhem ZouZou

2005-11-17

209

Sets and the Venn Diagram  

NSDL National Science Digital Library

This lesson is designed to introduce students to sets, terms used with sets, and Venn diagrams. This lesson provides links to discussions and activities related to sets and Venn diagrams as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

2011-05-23

210

Architecture flow diagrams under Teamwork  

Microsoft Academic Search

The Teamwork CASE tool allows data flow diagrams (DFDs) to be maintained for structured analysis. Fermilab has extended Teamwork under UNIX 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.

Tom Nicinski

1992-01-01

211

Time-Based Voronoi Diagram  

Microsoft Academic Search

We consider a variation of Voronoi diagram, or time-based Voronoi diagram, for a set S of points in the presence of transportation lines or highways in the plane. A shortest time-distance path from a query point to any given point in S is a path that takes the least travelling time. The travelling speeds and hence travelling times of the

D. T. Lee; Chung-Shou Liao; Wei-Bung Wang

212

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

213

Development and application of a rubric for analysis of novice students' laboratory flow diagrams  

Microsoft Academic Search

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' understanding of the manual.

Bette Davidowitz; Marissa Rollnick; Cynthia Fakudze

2005-01-01

214

Bier's block revisited: intercuff block.  

PubMed Central

Bier introduced his intravenous technique of local anaesthesia to facilitate palliative surgery on the elbow or knee. He cannulated a suitably large vein in the vicinity of the joint to inject procaine after first isolating the operating site with a proximal and a distal tourniquet. This extra containment of the local anaesthetic solution made it feasible to flush out any unfixed drug with saline before release of the main tourniquet, an advantage which has been lost in the currently fashionable technique of intravenous regional anaesthesia (IVRA) involving a single tourniquet above the elbow or knee and a fine butterfly needle in a vein on the dorsum of the hand or foot. A modern version of Bier's original method is described, conveniently called an intercuff block (ICB), which reintroduces the possibility of effective flushing, offers better operating conditions and engenders new ideas for further study. PMID:2182859

Hannington-Kiff, J G

1990-01-01

215

Bier's block revisited: intercuff block.  

PubMed

Bier introduced his intravenous technique of local anaesthesia to facilitate palliative surgery on the elbow or knee. He cannulated a suitably large vein in the vicinity of the joint to inject procaine after first isolating the operating site with a proximal and a distal tourniquet. This extra containment of the local anaesthetic solution made it feasible to flush out any unfixed drug with saline before release of the main tourniquet, an advantage which has been lost in the currently fashionable technique of intravenous regional anaesthesia (IVRA) involving a single tourniquet above the elbow or knee and a fine butterfly needle in a vein on the dorsum of the hand or foot. A modern version of Bier's original method is described, conveniently called an intercuff block (ICB), which reintroduces the possibility of effective flushing, offers better operating conditions and engenders new ideas for further study. PMID:2182859

Hannington-Kiff, J G

1990-03-01

216

Transformations of triangle ladder diagrams  

E-print Network

It is shown how dual space diagrammatic representation of momentum integrals corresponding to triangle ladder diagrams with an arbitrary number of rungs can be transformed to half-diamonds. In paper arXiv:0803.3420 [hep-th] the half-diamonds were related by conformal integral substitution to the diamonds which represent the dual space image of four-point ladder integrals in the four-dimensional momentum space. Acting in the way described in the present paper we do not need to use the known result for diamond (four-point) diagrams as an external input in deriving relations of arXiv:0803.3420 [hep-th], however, that result for the diamond diagram arises in the present proof as an intermediate consequence in a step-by-step diagrammatic transformation from the triangle ladder diagram to the half-diamond diagrams.

Igor Kondrashuk; Alvaro Vergara

2010-02-13

217

Incorporation of gypsum waste in ceramic block production: Proposal for a minimal battery of tests to evaluate technical and environmental viability of this recycling process.  

PubMed

Civil engineering-related construction and demolition debris is an important source of waste disposed of in municipal solid waste landfills. After clay materials, gypsum waste is the second largest contributor to the residential construction waste stream. As demand for sustainable building practices grows, interest in recovering gypsum waste from construction and demolition debris is increasing, but there is a lack of standardized tests to evaluate the technical and environmental viability of this solid waste recycling process. By recycling gypsum waste, natural deposits of gypsum might be conserved and high amounts of the waste by-product could be reused in the civil construction industry. In this context, this paper investigates a physical property (i.e., resistance to axial compression), the chemical composition and the ecotoxicological potential of ceramic blocks constructed with different proportions of clay, cement and gypsum waste, and assesses the feasibility of using a minimal battery of tests to evaluate the viability of this recycling process. Consideration of the results for the resistance to axial compression tests together with production costs revealed that the best formulation was 35% of plastic clay, 35% of non-plastic clay, 10% of Portland cement and 20% of gypsum waste, which showed a mean resistance of 4.64MPa. Energy dispersive X-ray spectrometry showed calcium and sulfur to be the main elements, while quartz, gypsum, ettringite and nacrite were the main crystalline compounds found in this formulation. Ecotoxicity tests showed that leachate from this formulation is weakly toxic toward daphnids and bacteria (EC(20%)=69.0 and 75.0, respectively), while for algae and fish the leachate samples were not toxic at the EC(50%) level. Overall, these results show that the addition of 20% of gypsum waste to the ceramic blocks could provide a viable substitute for clay in the ceramics industry and the tests applied in this study proved to be a useful tool for the technical and environmental evaluation of this recycling process, bacterial and daphnid tests being more sensitive than algae and fish tests. PMID:21959139

Godinho-Castro, Alcione P; Testolin, Renan C; Janke, Leandro; Corrêa, Albertina X R; Radetski, Claudemir M

2012-01-01

218

mre11S—a yeast mutation that blocks double-strand-break processing and permits nonhomologous synapsis in?meiosis  

PubMed Central

During meiotic prophase the repair of self-inflicted DNA double-strand break (DSB) damage leads to meiotic recombination in yeast. We employed a genetic screen to specifically characterize cellular functions that become essential after this DSB formation. As a result a new allele of MRE11, termed mre11S (for Separation of functions) was isolated that allows initiation but not processing and repair of meiotic DSBs similar to the well-characterized rad50S allele. In contrast, the mre11-1 allele blocks initiation of meiotic DSBs as reported previously by others. The mre11S allele, which is mutated in the 5? part of the gene, can partially complement mre11 alleles disrupted close to the 3? end that cannot initiate DSBs when homozygous. This suggests homodimerization of the Mre11 protein and the presence of separate domains for DSB initiation and 5? resection. The fact that two genes, RAD50 and MRE11, required for DSB processing are also essential for DSB initiation dictates a model in which a bifunctional initiation/repair complex is required to initiate meiotic recombination. A subset of mre11S nuclei was shown to perform extensive but partially nonhomologous synapsis. We propose that the unprocessed DSBs present in mre11S allow for synapsis, but that homologous synapsis is only ensured at a later stage of recombination. PMID:9303542

Nairz, Knud; Klein, Franz

1997-01-01

219

Analysis of a solid-on-solid type block model for particle redeposition in ion-beam erosion processes under normal incidence  

NASA Astrophysics Data System (ADS)

In this paper we present and investigate a simple yet physically plausible solid-on-solid type block model for the redeposition of eroded particles during ion-beam erosion processes under normal ion incidence. This model, which is based on a more general version presented in an earlier study, focuses on the very essential aspects of what one will commonly associate with the redeposition of sputtered particles. Other potential surface effects such as the Bradley-Harper mechanism are thus not taken account of. Additionally, the model is kept one-dimensional for reasons of simplicity. We introduce that model in detail, and then discuss its properties thoroughly. In particular, we show how to decouple the erosion and redeposition component in the formal description of the evolution process of the sputtered surfaces in order to derive a semi-analytical continuum approximation for both the erosion and the redeposition subprocess. The latter is investigated at length, and eventually a connection is drawn to the non-locally stabilized Kuramoto-Sivashinsky equation to discuss the potential role of particle redeposition as the physical origin of the damping term in that equation.

Anspach, Nils; Linz, Stefan J.

2012-06-01

220

Epstein-Barr Viral BNLF2a Protein Hijacks the Tail-anchored Protein Insertion Machinery to Block Antigen Processing by the Transport Complex TAP*  

PubMed Central

Virus-infected cells are eliminated by cytotoxic T lymphocytes, which recognize viral epitopes displayed on major histocompatibility complex class I molecules at the cell surface. Herpesviruses have evolved sophisticated strategies to escape this immune surveillance. During the lytic phase of EBV infection, the viral factor BNLF2a interferes with antigen processing by preventing peptide loading of major histocompatibility complex class I molecules. Here we reveal details of the inhibition mechanism of this EBV protein. We demonstrate that BNLF2a acts as a tail-anchored protein, exploiting the mammalian Asna-1/WRB (Get3/Get1) machinery for posttranslational insertion into the endoplasmic reticulum membrane, where it subsequently blocks antigen translocation by the transporter associated with antigen processing (TAP). BNLF2a binds directly to the core TAP complex arresting the ATP-binding cassette transporter in a transport-incompetent conformation. The inhibition mechanism of EBV BNLF2a is distinct and mutually exclusive of other viral TAP inhibitors. PMID:21984826

Wycisk, Agnes I.; Lin, Jiacheng; Loch, Sandra; Hobohm, Kathleen; Funke, Jessica; Wieneke, Ralph; Koch, Joachim; Skach, William R.; Mayerhofer, Peter U.; Tampé, Robert

2011-01-01

221

Epstein-Barr viral BNLF2a protein hijacks the tail-anchored protein insertion machinery to block antigen processing by the transport complex TAP.  

PubMed

Virus-infected cells are eliminated by cytotoxic T lymphocytes, which recognize viral epitopes displayed on major histocompatibility complex class I molecules at the cell surface. Herpesviruses have evolved sophisticated strategies to escape this immune surveillance. During the lytic phase of EBV infection, the viral factor BNLF2a interferes with antigen processing by preventing peptide loading of major histocompatibility complex class I molecules. Here we reveal details of the inhibition mechanism of this EBV protein. We demonstrate that BNLF2a acts as a tail-anchored protein, exploiting the mammalian Asna-1/WRB (Get3/Get1) machinery for posttranslational insertion into the endoplasmic reticulum membrane, where it subsequently blocks antigen translocation by the transporter associated with antigen processing (TAP). BNLF2a binds directly to the core TAP complex arresting the ATP-binding cassette transporter in a transport-incompetent conformation. The inhibition mechanism of EBV BNLF2a is distinct and mutually exclusive of other viral TAP inhibitors. PMID:21984826

Wycisk, Agnes I; Lin, Jiacheng; Loch, Sandra; Hobohm, Kathleen; Funke, Jessica; Wieneke, Ralph; Koch, Joachim; Skach, William R; Mayerhofer, Peter U; Tampé, Robert

2011-12-01

222

Triangle Diagram with Off-Shell Coulomb T-Matrix for (In-)Elastic Atomic and Nuclear Three-Body Processes  

E-print Network

The driving terms in three-body theories of elastic and inelastic scattering of a charged particle off a bound state of two other charged particles contain the fully off-shell two-body Coulomb T-matrix describing the intermediate-state Coulomb scattering of the projectile with each of the charged target particles. Up to now the latter is usually replaced by the Coulomb potential, either when using the multiple-scattering approach or when solving three-body integral equations. General properties of the exact and the approximate on-shell driving terms are discussed, and the accuracy of this approximation is investigated numerically, both for atomic and nuclear processes including bound-state excitation, for energies below and above the corresponding three-body dissociation threshold, over the whole range of scattering angles.

E. O. Alt; A. S. Kadyrov; A. M. Mukhamedzhanov; M. Rauh

1995-03-16

223

Influence of external factors on the micellization process and aggregate structure of poly(oxy)styrene-poly(oxy)ethylene block copolymers.  

PubMed

Solutions of the polyoxystyrene-polyoxyethylene block copolymer SO(17)EO(65), where SO denotes polystyrene oxide block as the hydrophobic block and EO the polyethylene oxide block as the hydrophilic block, in mixtures of water (a selective solvent for the EO blocks) and 1,4-dioxane (a good solvent for both blocks) were studied by surface tension and light scattering measurements. Surface and micellar structural parameters have been analyzed as a function of solvent composition. The critical micelle concentration increases and the micellar aggregation number decreases, respectively, as the amount of 1,4-dioxane in the binary solvent increases as a consequence of the enhanced solubility of the SO blocks in the solvent mixture, causing the lowering of the interfacial tension between the hydrophobic blocks in the micellar core and the solvent; therefore, to achieve thermodynamic equilibrium, the micelle size decreases. In addition, static light scattering (SLS) has been proved to be a useful technique to detect the lower boundary of the transition between a dilute micellar solution (sol) to a local-ordered micellar solution (soft gel) resulting from a percolation mechanism. Comparison of the sol-soft gel boundaries obtained from SLS for copolymers SO(17)EO(65) and EO(67)SO(15)EO(67) with those previously derived by rheology is made. Finally, changes in the autocorrelation function of the solutions at the boundary obtained from dynamic light scattering are also analyzed. PMID:18393548

Castro, Emilio; Barbosa, Silvia; Juarez, Josué; Taboada, Pablo; Katime, Issa A; Mosquera, Víctor

2008-05-01

224

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

225

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 ...

Mrs. Simonson

2009-12-05

226

The Hertzsprung-Russell Diagram.  

ERIC Educational Resources Information Center

Describes a classroom use of the Hertzsprung-Russell diagram to infer not only the properties of a star but also the star's probable stage in evolution, life span, and age of the cluster in which it is located. (ZWH)

Woodrow, Janice

1991-01-01

227

Formulae and Flow-Diagrams  

ERIC Educational Resources Information Center

The author recommends the use of flow charting to help students understand the manipulation of algebraic formulae. He identifies some problems with flow charts and suggests an alternative method of constructing flow diagrams. (SD)

Willson, William Wynne

1977-01-01

228

Reheating Phase Diagram for Higgs Inflation  

E-print Network

We investigate the impact on the inflationary predictions from various reheating histories which are characterized by an e-folding number $N_{\\mathrm{reh}}$ and an effective equation-of-state parameter $w_{\\mathrm{reh}}$ during reheating process. For Higgs inflation with a non-minimal coupling to gravity, the predictions are obtained on the $N_{\\mathrm{reh}}\\!\\!-\\!w_{\\mathrm{reh}}$ reheating phase diagram. We find that the predictions are insensitive to reheating phase. Within the $1\\sigma$ region of the scalar spectral index $n_s$ reported by Planck 2014 Preliminary, almost all possible reheating histories are allowed on the reheating phase diagram, where Higgs inflation with canonical reheating history $w_{\\mathrm{reh}}=0$ lies near the upper edge of the $1\\sigma$ range of $n_s$. Future measurements of $n_s$ with high precision will identify the reheating physics of Higgs inflation.

Cai, Rong-Gen; Wang, Shao-Jiang

2015-01-01

229

Bringing class diagrams to life  

Microsoft Academic Search

Research in formal methods emphasizes a fundamental interconnection between modeling, calculation and prototyping, made possible\\u000a by a common unambiguous, mathematical semantics. This paper, building on a broader research agenda on coalgebraic semantics\\u000a for Unified Modeling Language diagrams, concentrates on class diagrams and discusses how such a coalgebraic perspective can\\u000a be of use not only for formalizing their specification, but also

Luís Soares Barbosa; Sun Meng

2010-01-01

230

Interpreting T-X Diagrams  

NSDL National Science Digital Library

This short problem set works well as a group activity that can be completed in class. The purpose of the exercise is for students to begin to think about T-X phase diagrams and how they are interpreted. Along the way, students learn that text book authors sometimes make mistakes. The figure in the handout is from Winter's Petrology. But, Winter goofed and left some reactions off of the phase diagram.

Dexter Perkins

231

Changing Perceptions of Animated Diagrams  

Microsoft Academic Search

\\u000a While the educational effectiveness of static diagrams is underpinned by a long heritage of manipulating visuospatial characteristics\\u000a of the depicted content to improve explanatory power, no corresponding evolution has occurred regarding temporal manipulation\\u000a of animated diagrams. When complex dynamic subject matter is presented using animations that depict temporal information in\\u000a a behaviorally realistic manner, the perceptual properties of the display

Richard Lowe

2006-01-01

232

Semantic specification and verification of data flow diagrams  

Microsoft Academic Search

Data Flow Diagram (DFD) has been widely used in Software Engineering as means of requirement analysis and system specification.\\u000a However, one defect of DFD approach remains untackled: the lack of formal semantics has brought about a lot of problems. In\\u000a this paper, we model Data Flow Diagram as networks of concurrent processes. With the use of temporal logic language XYZ\\/E,

Tong Liu; C. S. Tang

1991-01-01

233

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

234

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 ...

Mrs. Brown

2010-03-20

235

UML 2 activity model support for systems engineering functional flow diagrams  

Microsoft Academic Search

This article compares Activity models of the Unified Modeling Language, version 2 (UML 2) (OMG (Object Management Group), UML 2.0 superstructure specification, August 2003, http:\\/\\/www.omg.org\\/cgi-bin\\/doc?ptc\\/03-08-02), to a widely-used systems engineering (SE) flow diagram, the Enhanced Functional Flow Block Diagram (EFFBD) (J. Long, Relationships between common graphical representations in system engineering, ViTech Corporation, 2002), and to the requirements for functional flow

Conrad Bock

2003-01-01

236

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

237

A. Syntax Diagrams A-1 Appendix A  

E-print Network

A. Syntax Diagrams A-1 Appendix A: Syntax Diagrams References: · Kathleen Jensen/Niklaus Wirth A is a short introduction to syntax diagrams. · Don Chamberlin: A Complete Guide to DB2 Universal Database. Morgan Kaufmann, 1998. Section 1.1.2 is a very quick introduction to syntax diagrams. Stefan Brass

Brass, Stefan

238

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

239

CONTEXTEXPLOITING SHAPES FOR DIAGRAM TRANSFORMATION Frank Drewes  

E-print Network

with editors for control flow diagrams, Nassi­Shneiderman diagrams, message sequence charts, state charts primitives, and reduces them to dia­ gram symbols, like assignments and branches in a control flow diagramCONTEXT­EXPLOITING SHAPES FOR DIAGRAM TRANSFORMATION Frank Drewes Institutionen fË?or Datavetenskap

Drewes, Frank

240

NAAP HR Diagram Explorer 1/9 HR Diagram Student Guide  

E-print Network

Name: NAAP ­ HR Diagram Explorer 1/9 HR Diagram ­ Student Guide Background Information Work through Orionis O9 Radius (R) Temperature (T) Luminosity (L) 1 1 1 2 1 9 1 1/2 #12;NAAP ­ HR Diagram Explorer 2 Diagram Explorer Open the HR Diagram Explorer. Begin by familiarizing yourself with the capabilities

Farritor, Shane

241

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

242

Intrinsic spatial resolution evaluation of the X'tal cube PET detector based on a 3D crystal block segmented by laser processing.  

PubMed

The X'tal cube is a depth-of-interaction (DOI)-PET detector which is aimed at obtaining isotropic resolution by effective readout of scintillation photons from the six sides of a crystal block. The X'tal cube is composed of the 3D crystal block with isotropic resolution and arrays of multi-pixel photon counters (MPPCs). In this study, to fabricate the 3D crystal block efficiently and precisely, we applied a sub-surface laser engraving (SSLE) technique to a monolithic crystal block instead of gluing segmented small crystals. The SSLE technique provided micro-crack walls which carve a groove into a monolithic scintillator block. Using the fabricated X'tal cube, we evaluated its intrinsic spatial resolution to show a proof of concept of isotropic resolution. The 3D grids of 2 mm pitch were fabricated into an 18 × 18 × 18 mm(3) monolithic lutetium yttrium orthosilicate (LYSO) crystal by the SSLE technique. 4 × 4 MPPCs were optically coupled to each surface of the crystal block. The X'tal cube was uniformly irradiated by (22)Na gamma rays, and all of the 3D grids on the 3D position histogram were separated clearly by an Anger-type calculation from the 96-channel MPPC signals. Response functions of the X'tal cube were measured by scanning with a (22)Na point source. The gamma-ray beam with a 1.0 mm slit was scanned in 0.25 mm steps by positioning of the X'tal cube at vertical and 45° incident angles. The average FWHM resolution at both incident angles was 2.1 mm. Therefore, we confirmed the isotropic spatial resolution performance of the X'tal cube. PMID:22782296

Yoshida, Eiji; Tashima, Hideaki; Inadama, Naoko; Nishikido, Fumihiko; Moriya, Takahiro; Omura, Tomohide; Watanabe, Mitsuo; Murayama, Hideo; Yamaya, Taiga

2013-01-01

243

The REA Ontology to Supplement Teaching Data Flow Diagrams  

Microsoft Academic Search

Systems Analysis and Design is a core component of most information systems curricula, and generally includes coverage of process modeling with d ata f low diagrams. I n o rder to relate process modeling to something with w hich all students are familiar, the content of a traditional Systems Analysis and Design course can be supplemented with an ontological framework.

Kevin R. Parker; Ken Trimmer; Cindy LeRouge

2005-01-01

244

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

245

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

246

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

247

Dynamic programming and influence diagrams  

Microsoft Academic Search

The concept of a super value node is developed to extend the theory of influence diagrams to allow dynamic programming to be performed within this graphical modeling framework. The operations necessary to exploit the presence of these nodes and efficiently analyze the models are developed. The key result is that by representing value function separability in the structure of the

JOSEPH A. TATMAN; ROSS D. SHACHTER

1990-01-01

248

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

249

Causal diagrams for empirical research  

Microsoft Academic Search

The primary aim of this paper is to show how graphical models can be used as a mathematical language for integrating statistical and subject-matter information. In particular, the paper develops a principled, nonparametric framework for causal inference, in which diagrams are queried to determine if the assumptions available are sufficient for identifying causal effects from nonexperimental data. If so the

JUDEA PEARL

1995-01-01

250

Phase Diagrams for Sonoluminescing Bubbles  

Microsoft Academic Search

Sound driven gas bubbles in water can emit light pulses. This phenomenon is called sonoluminescence (SL). Two different phases of single bubble SL have been proposed: diffusively stable and diffusively unstable SL. We present phase diagrams in the gas concentration vs forcing pressure state space and also in the ambient radius vs gas concentration and vs forcing pressure state spaces.

Sascha Hilgenfeldt; Detlef Lohse; Michael P. Brenner

1996-01-01

251

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.

John Nielsen-Gammon

1996-01-01

252

Using influence diagrams for PERT  

Microsoft Academic Search

Summary form only given. We describe a new method for explicit modeling of decisions that bear on activity times in a project. This method extends the PERT belief network (PBN) model to include decisions variables. The resulting network is called PERT Influence Diagram (PID). A PID is a PBN that includes decision variables, where arrows into decision nodes mean that

A. Jenzarli

1997-01-01

253

Voronoi Diagrams and Spring Rain  

ERIC Educational Resources Information Center

The goal of this geometry project is to use Voronoi diagrams, a powerful modeling tool across disciplines, and the integration of technology to analyze spring rainfall from rain gauge data over a region. In their investigation, students use familiar equipment from their mathematical toolbox: triangles and other polygons, circumcenters and…

Perham, Arnold E.; Perham, Faustine L.

2011-01-01

254

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.

Kenneth E Windom

255

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

256

Telesynergy V3 Wiring Diagram  

Cancer.gov

Extron 8 port Video/Audio Switch WAVE Camera Telesynergy v3 Wiring Diagram ISDN T1/PRI Module CTRLR 0 Legend: S-Video Audio VGA DVI USB RS-232 Serial Microphone Ethernet Planar C5i AMD Exam Cam Canon Document Camera Olympus BX51 Sony DVD Recorder JVC

257

Policy Specification Using Sequence Diagrams  

E-print Network

of Information Science and Media Studies and at the Faculty of Social Sciences at the Uni- versity of BergenPolicy Specification Using Sequence Diagrams Applied to Trust Management Bjørnar Solhaug which was funded by the Research Council of Norway. The ENFORCE project was a joint initiative between

Stølen, Ketil

258

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

259

PAPER Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications An MMSE Multiuser Detector for Space-Time Block Coded OFDM  

Microsoft Academic Search

SUMMARY In this paper, we propose a multiuser detection (MUD) scheme for space-time block coded orthogonal frequency division mul- tiplexing (STBC-OFDM) systems. We derive the optimum weight ma- trix used to decouple simultaneously signals from active multiple access users using the minimum mean square error (MMSE) multiuser detection method. The proposed scheme provides good performance over different models of the

Xuan Nam TRAN; Tadashi FUJINO; Yoshio KARASAWA

260

State diagrams of linear sequential machines  

E-print Network

14 37 38 LIST OF FIGURFS FIGURE Page 1. State Diagram M . 2. Diagram of Example l. 3. Diagram of Example 2. 4. Diagram of Example 3. 5. State Diagram of a Linear Sequential Machine. 6. State Diagram of a Sequential Machine . 24 26 35 36.... A sequential machine N is a five-tuple &S, I, s, 6, x& where S is a set of states, I is a set of input symbols, A is a set of output symbols, s is the transition function, and ~ is the output function. A particular three-state machine h1=&S, I, a...

English, Linda Sue

1977-01-01

261

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

262

Critical point analysis of phase envelope diagram  

SciTech Connect

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; Siagian, Ucok W. R. [Department of Petroleum Engineering, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia); Kusdiantara, Rudy, E-mail: rkusdiantara@s.itb.ac.id; Puspita, Dila, E-mail: rkusdiantara@s.itb.ac.id; Sidarto, Kuntjoro A., E-mail: rkusdiantara@s.itb.ac.id; Soewono, Edy; Gunawan, Agus Y. [Department of Mathematics, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia)

2014-03-24

263

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

264

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

265

Block That Pain!  

MedlinePLUS

... combination produces a unique effect, blocking pain-sensing neurons without impairing signals from other cells. In contrast, ... surgical procedures block activity in all types of neurons. This can cause numbness, paralysis, and other nervous ...

266

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.

National Library of Virtual Manipulatives

2008-12-10

267

Generation of powder compaction response diagrams  

SciTech Connect

The effect of elastic compliances in the testing system is shown to have a considerable influence on the compaction diagram generated via an automatic procedure. Proper accounting of this effect allows rapid and accurate diagrams to be made.

Matsumoto, R.L.K.

1986-10-01

268

Adapting Diagrams from Physics Textbooks: A Way to Improve the Autonomy of Blind Students  

ERIC Educational Resources Information Center

We devise and test a set of tactile symbols to represent elements frequently used in mechanics diagrams, such as vectors, ropes, pulleys, blocks and surfaces, that can be used to adapt drawings of physics situations in textbooks for blind students. We also investigate how figures are described for blind students in classroom activities and exams,…

Dickman, A. G.; Martins, A. O.; Ferreira, A. C.; Andrade, L. M.

2014-01-01

269

The Human Immune Response to Plasmodium falciparum Includes Both Antibodies That Inhibit Merozoite Surface Protein 1 Secondary Processing and Blocking Antibodies  

Microsoft Academic Search

Malaria merozoite surface protein 1 (MSP1) is cleaved in an essential step during erythrocyte invasion. The responses of children to natural malaria infection included antibodies that inhibit this cleavage and others that block the binding of these inhibitory antibodies. There was no correlation between the titer of the antibody to the 19-kDa fragment of MSP1 and its inhibitory activity. These

Roseangela I. Nwuba; Olugbemiro Sodeinde; Chiaka I. Anumudu; Yusuf O. Omosun; Alexander B. Odaibo; Anthony A. Holder; Mark Nwagwu

2002-01-01

270

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

271

The Block Scheduling Handbook.  

ERIC Educational Resources Information Center

Block scheduling encourages increased comprehensive immersion into subject matter, improved teacher-student relationships, and decreased disciplinary problems. While block scheduling may offer many advantages, moving to a block schedule from conventional scheduling can be a major adjustment for both students and teachers. This guide is intended to…

Queen, J. Allen

272

The Butterfly Diagram Internal Structure  

NASA Astrophysics Data System (ADS)

A time-latitude diagram, where the spotgroup area is taken into account, is presented for cycles 12 through 23. The results show that the spotted area is concentrated in few, small portions ("knots") of the Butterfly Diagram (BD). The BD may be described as a cluster of knots. Knots are distributed in the butterfly wings in a seemingly randomly way. A knot may appear at either lower or higher latitudes than previous ones, in spite of the prevalent tendency to appear at lower and lower latitudes. Accordingly, the spotted area centroid, far from continuously drifting equatorward, drifts poleward or remains stationary in any hemisphere for significant fractions (? 1/3) of the cycle total duration. In a relevant number of semicycles, knots seem to form two roughly parallel, oblique "chains", separated by an underspotted band. This picture suggests that two (or more) "activity streams" approach the equator at a rate higher than the spot zone as a whole.

Ternullo, Maurizio

2013-06-01

273

A Library of SIMULINK Blocks for Real-Time Control of HEV Traction John Chiasson1  

E-print Network

of Automotive Engineers, Inc. ABSTRACT This paper describes the development of advanced control and modeling MATLAB/SIMULINK which allows one not only to design a controller for the system using block diagrams (on02FCC-30 A Library of SIMULINK Blocks for Real-Time Control of HEV Traction Drives John Chiasson1

Tolbert, Leon M.

274

Reasoning on UML class diagrams  

Microsoft Academic Search

UML is the de-facto standard formalism for software design and analysis. To sup- port the design of large-scale industrial applications, sophisticated CASE tools are available on the market, that provide a user-friendly environment for editing, stor- ing, and accessing multiple UML diagrams. It would be highly desirable to equip such CASE tools with automated reasoning capabilities, such as those studied

Daniela Berardi; Diego Calvanese; Giuseppe De Giacomo

2005-01-01

275

Reasoning on UML Class Diagrams  

Microsoft Academic Search

UML is the de-facto standard formalism for software design and analysis. To support the design of large-scale industrial applications, sophisticated CASE tools are available on the market, that provide a user-friendly environment for editing, storing, and accessing multiple UML diagrams. It would be highly desirable to equip such CASE tools with automated reasoning capabilities in order to detect relevant formal

Daniela Berardi; Andrea Cal; Diego Calvanese; Giuseppe De Giacomo

2003-01-01

276

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.

Dexter Perkins

277

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.

Dexter Perkins

278

Algorithm Discovery with Venn Diagrams  

NSDL National Science Digital Library

This lesson is designed to develop students' abilities to create algorithms or a set of directions to solve a problem. In this lesson, the problem is to determine the rules in a Venn diagram. This lesson provides links to discussions and activities related to the topic as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

2011-05-23

279

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

280

INCONEL 718: A solidification diagram  

NASA Astrophysics Data System (ADS)

As part of a program studying weldability of Ni-base superalloys, results of an integrated analytical approach are used to generate a constitution diagram for INCONEL 718* in the temperature range associated with solidification. Differential thermal analysis of wrought material and optical and scanning electron microscopy, electron probe microanalysis, and analytical electron microscopy of gas tungsten arc welds are used in conjunction with solidification theory to generate data points for this diagram. The important features of the diagram are an austenite (?)/Laves phase eutectic which occurs at ?19.1 wt pct Nb between austenite containing ?9.3 wt pct Nb and a Laves phase which contains ?22.4 wt pct Nb. The distribution coefficient for Nb was found to be ?0.5. The solidification sequence of INCONEL 718 was found to be (1) proeutectic ?, followed by (2) a ?/NbC eutectic at ?1250°C, followed by (3) continued ? solidification, followed by (4) a ?/Laves phase eutectic at ?1200°C. An estimate of the volume fraction eutectic is made using the Scheil solidification model, and the fraction of each phase in the eutectic is calculated via the lever rule. These are compared with experimentally determined values and found to be in good agreement.

Knorovsky, G. A.; Cieslak, M. J.; Headley, T. J.; Romig, A. D.; Hammetter, W. F.

1989-10-01

281

2IW05 Software Specification Class Diagrams  

E-print Network

2IW05 ­ Software Specification Class Diagrams Mohammad Mousavi Formal Systems Analysis (FSA) Model-Driven Software Engineering Department of Computer Science TU/Eindhoven September 7, 2012 #12;News 1 Send me specification: 1 Class diagram: data types, their operations and dependencies (extended ERDs) 2 Package diagram

Mousavi, Mohammad

282

On Class Diagrams, Crossings and Metrics  

Microsoft Academic Search

UML class diagrams, internationally specified and widely used in software engineering, are a great challenge in automatic drawing of graphs. Due to the complex nature of UML class diagrams and the requirements of software engineers, who need to read these diagrams, layout rules and algo- rithms for general graphs can not be applied without adaptions, extensions and modifications. In this

Holger Eichelberger

2005-01-01

283

Diagrams in Biology1 Laura Perini  

E-print Network

, as biologists plan experiments with flow charts, and draw models to represent hypotheses for consideration representational features of diagrams. Analysis of the relation between the forms and contents of diagrams1 Diagrams in Biology1 Laura Perini Department of Philosophy Pomona College Abstract Biologists

McBurney, Peter

284

A Layout Algorithm for Data Flow Diagrams  

Microsoft Academic Search

A layout algorithm is presented that allows the automatic drawing of data flow diagrams, a diagrammatic representation widely used in the functional analysis of information systems. A grid standard is defined for such diagrams, and aesthetics for a good readability are identified. The layout algorithm receives as input an abstract graph, specifying connectivity relations between the elements of the diagram,

Carlo Batini; Enrico Nardelli; Roberto Tamassia

1986-01-01

285

A Formal Semantics of Data Flow Diagrams  

Microsoft Academic Search

This document presents a full version of the formal semantics of data ow diagrams reported in [Larsen&93]. Data Flow Diagrams are used in Structured Analysis and are based on an abstract model for data flow transformations. The semantics consists of a collection of VDM functions, transforming an abstract syntax representation of a data flow diagram into an abstract syntax representation

Peter Gorm Larsen; Nico Plat; Hans Toetenel

1994-01-01

286

Regulating block copolymer phases via selective homopolymers.  

PubMed

The phase behavior of strongly segregated AB diblock copolymer and selective C homopolymer blends is examined theoretically using a combination of strong stretching theory (SST) and self-consistent field theory (SCFT). The C-homopolymer is immiscible with the B-blocks but strongly attractive with the A-blocks. The effect of homopolymer content on the order-order phase transitions is analyzed. It is observed that, for AB diblock copolymers with majority A-blocks, the addition of the C-homopolymers results in lamellar to cylindrical to spherical phase transitions because of the A/C complexation. For diblock copolymers with minor A-blocks, adding C-homopolymers leads to transitions from spherical or cylindrical morphology with A-rich core to lamellae to inverted cylindrical and spherical morphologies with B-rich core. The results from analytical SST and numerical SCFT are in good agreement within most regions of the phase diagram. But the deviation becomes more obvious when the composition of A-blocks is too small and the content of added C-homopolymers is large enough, where the SCFT predicts a narrow co-existence region between different ordered phases. Furthermore, it is found that the phase behavior of the system is insensitive to the molecular weight of C-homopolymer. PMID:25833605

Yang, Shuang; Lei, Zhen; Hu, Nan; Chen, Er-Qiang; Shi, An-Chang

2015-03-28

287

Regulating block copolymer phases via selective homopolymers  

NASA Astrophysics Data System (ADS)

The phase behavior of strongly segregated AB diblock copolymer and selective C homopolymer blends is examined theoretically using a combination of strong stretching theory (SST) and self-consistent field theory (SCFT). The C-homopolymer is immiscible with the B-blocks but strongly attractive with the A-blocks. The effect of homopolymer content on the order-order phase transitions is analyzed. It is observed that, for AB diblock copolymers with majority A-blocks, the addition of the C-homopolymers results in lamellar to cylindrical to spherical phase transitions because of the A/C complexation. For diblock copolymers with minor A-blocks, adding C-homopolymers leads to transitions from spherical or cylindrical morphology with A-rich core to lamellae to inverted cylindrical and spherical morphologies with B-rich core. The results from analytical SST and numerical SCFT are in good agreement within most regions of the phase diagram. But the deviation becomes more obvious when the composition of A-blocks is too small and the content of added C-homopolymers is large enough, where the SCFT predicts a narrow co-existence region between different ordered phases. Furthermore, it is found that the phase behavior of the system is insensitive to the molecular weight of C-homopolymer.

Yang, Shuang; Lei, Zhen; Hu, Nan; Chen, Er-Qiang; Shi, An-Chang

2015-03-01

288

Controlled self-assembly of conjugated rod-coil block copolymers for applications in organic optoelectronics  

NASA Astrophysics Data System (ADS)

Organic electronics are of great interest in manufacturing light weight, mechanical flexible, and inexpensive large area devices. While significant improvements have been made over the last several years and it is now clear that morphology on the lengthscale of exciton diffusion (10nm) is of crucial importance, a clear relationship between structure and device properties has not emerged. This lack of understanding largely emerges from an inability to control morphology on this lengthscale. This thesis will center around an approach, based on block copolymer self-assembly, to generate equilibrium nanostructures on the 10 nm lengthscale of exciton diffusion and study their effects on device performance. Self-assembly of semiconducting block copolymers is complicated by the non-classical chain shape of conjugated polymers. Unlike classical polymers, the chains do not assume a Gaussian coil shape which is stretched near block copolymer interfaces, instead the chains are elongated and liquid crystalline. Previous work has demonstrated how these new molecular interactions and shapes control the phase diagram of so-called rod-coil block copolymers. Here, we will focus on controlling domain size, orientation, and chemical structure. While domain size can be controlled directly through molecular weight, this requires significant additional synthesis of domain size is to be varied. Here, the domain size is controlled by blending homopolymers into a self-assembling rod-coil block copolymer. When coil-like blocks are incorporated, the domains swell, as expected. When rod-like blocks are incorporated, they interdigitate with the rods of the block copolymers. This results in an increase in interfacial area which forces the coils to rearrange and an overall decrease in domain size with increasing rod content. Control over lamellar orientation is crucial in order to design and control charge transport pathways and exciton recombination or separation interfaces. While numerous techniques have been demonstrated for classical block copolymers, the pi conjugation in the rod blocks allow for additional control mechanisms. Liquid crystals are traditionally aligned in magnetic fields. Here, it is demonstrated that if the rod-like blocks are aligned unidirectionally, the block copolymer interfaces follow to create macroscopic alignment of the nanostructures. Organic Light Emitting Diodes (OLEDs) are generally composed of electron transporting and hole transporting moieties to balance charge recombination. Here, a new multifunctional bipolar rod-coil block copolymer containing the hole transporting and electron transporting materials is synthesized. Self-assembly of this new block copolymer results in 15nm lamellae oriented in grains both parallel and perpendicula to the anode. The self-assembled block copolymer shows superior device performance to controls consisting of a luminescent, analogous homopolymer, and a blend of the two component homopolymers. The effects of the morphologies and chemical structure on photovoltaics is explored with a rod-coil block copolymer, (poly(3-hexylthiophene-b-acrylic perylene)). By varying the kinetics of self-assembly through processing, the block copolymer can be disordered, ordered with only short range registry between the nanodomains, or with long-range order. The short range ordered samples showed the best device performance suggesting that the connectivity that is a biproduct of poor order is beneficial for device performance.

Tao, Yuefei

289

Diagram, a Learning Environment for Initiation to Object-Oriented Modeling with UML Class Diagrams  

ERIC Educational Resources Information Center

This paper presents Diagram, a learning environment for object-oriented modelling (OOM) with UML class diagrams. Diagram an open environment, in which the teacher can add new exercises without constraints on the vocabulary or the size of the diagram. The interface includes methodological help, encourages self-correcting and self-monitoring, and…

Py, Dominique; Auxepaules, Ludovic; Alonso, Mathilde

2013-01-01

290

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

291

Modeling Yin-Yang balance in Tai-chi diagram with a melting-freezing rotating device part 2 ---the similarity and characteristic of Tai-chi diagram  

NASA Astrophysics Data System (ADS)

The physical model describing the Yin-Yang balance in the Tai-chi diagram via the melting and freezing processes taking place in a rotating device presented in reference [1] is further developed. The system of equations formulating the melting and freezing processes is transformed to a dimensionless form. The advantage of dimensionless equations not only reduces a significant number of parameters involved in the problem but also provides physical insight of the Tai-chi diagram. The solution of dimensionless equations offers the similarity and characteristic of the Tai-chi diagram[1].

Lin, Sui; Chen, Tzu-Fang; Huo, Yuhua

2002-05-01

292

Fast Formal Analysis of Requirements via "Topoi Diagrams"  

NASA Technical Reports Server (NTRS)

Early testing of requirements can decrease the cost of removing errors in software projects. However, unless done carefully, that testing process can significantly add to the cost of requirements analysis. We show here that requirements expressed as topoi diagrams can be built and tested cheaply using our SP2 algorithm, the formal temporal properties of a large class of topoi can be proven very quickly, in time nearly linear in the number of nodes and edges in the diagram. There are two limitations to our approach. Firstly, topoi diagrams cannot express certain complex concepts such as iteration and sub-routine calls. Hence, our approach is more useful for requirements engineering than for traditional model checking domains. Secondly, out approach is better for exploring the temporal occurrence of properties than the temporal ordering of properties. Within these restrictions, we can express a useful range of concepts currently seen in requirements engineering, and a wide range of interesting temporal properties.

Menzies, Tim; Powell, John; Houle, Michael E.; Kelly, John C. (Technical Monitor)

2001-01-01

293

Project Management Plan for the INEL technology logic diagrams  

SciTech Connect

This Project Management Plan (PjMP) describes the elements of project planning and control that apply to activities outlined in Technical Task Plan (TTP) ID-121117, ``Technology Logic Diagrams For The INEL.`` The work on this project will be conducted by personnel in EG&G Idaho, Inc.`s Waste Technology Development Program. Technology logic diagrams represent a formal methodology to identify technology gaps or needs within Environmental Restoration/Waste Management Operations, which will focus on Office of Environmental Restoration and Waste Management (EM-50) research and development, demonstration, test, and evaluation efforts throughout the US Department of Energy complex. This PjMP describes the objectives, organization, roles and responsibilities, workscope and processes for implementing and managing the technology logic diagram for the Idaho National Engineering Laboratory project.

Rudin, M.J.

1992-10-01

294

Project Management Plan for the INEL technology logic diagrams  

SciTech Connect

This Project Management Plan (PjMP) describes the elements of project planning and control that apply to activities outlined in Technical Task Plan (TTP) ID-121117, Technology Logic Diagrams For The INEL.'' The work on this project will be conducted by personnel in EG G Idaho, Inc.'s Waste Technology Development Program. Technology logic diagrams represent a formal methodology to identify technology gaps or needs within Environmental Restoration/Waste Management Operations, which will focus on Office of Environmental Restoration and Waste Management (EM-50) research and development, demonstration, test, and evaluation efforts throughout the US Department of Energy complex. This PjMP describes the objectives, organization, roles and responsibilities, workscope and processes for implementing and managing the technology logic diagram for the Idaho National Engineering Laboratory project.

Rudin, M.J.

1992-10-01

295

Research and Design of Program Abstract Table Based on UML Class Diagram  

Microsoft Academic Search

In program comprehension, program abstract table is used to sum up and empress the main messages of the program, and it provides an important process to obtain the result of program comprehension in program comprehension system. UML class diagrams directly linked to C++ language, the paper studies a method of mapping rules from UML class diagrams to tables, and analyses

Hui Gu; Huiying Qian; Hui Wang

2010-01-01

296

Learning from Text with Diagrams: Promoting Mental Model Development and Inference Generation  

ERIC Educational Resources Information Center

Two experiments investigated learning outcomes and comprehension processes when students learned about the heart and circulatory system using (a) text only, (b) text with simplified diagrams designed to highlight important structural relations, or (c) text with more detailed diagrams reflecting a more accurate representation. Experiment 1 found…

Butcher, Kirsten R.

2006-01-01

297

Formal Semantics for Structured Analysis Style Data Flow Diagram Specification Languages  

Microsoft Academic Search

Using operational semantic techniques, we present a formal semantics for an extendedvariant of structured analysis style data flow diagrams. This semantics is intendedto serve as a semantic foundation for many different specification languages thatspecify concurrent systems using a graphical notation similar to data flow diagrams.Besides allowing one to specify how information is processed, it allows one to specifythe dynamic behavior

Gary T. Leavens; Tim Wahls

1996-01-01

298

A Service-Oriented Analysis and Design Approach Based On Data Flow Diagram  

Microsoft Academic Search

In the paper, we analyze the shortages of service-oriented analysis and design (SOAD) methodologies, and then review the features of data flow diagram as a kind of requirement analysis technology. Finally, we propose an SOAD method using DFD diagram. Therefore, a process is provided as a guideline to aid analyst to accomplish high-quality service identification with the method. Through an

Zhao Yun; Si Huayou; Ni Yulin; Qi Hengnian

2009-01-01

299

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

300

Base blocks decimals  

NSDL National Science Digital Library

With this virtual manipulative, students can explore the meaning of place value and grouping as they add and subtract decimals. Base blocks consist of individual units, longs, flats, and blocks (ten of each set for base 10). These blocks can represent negative as well as positive numbers with one to four decimal places and in five different bases. Students exchange and group the blocks as needed to solve the problem. Problems can be presented to or created by the students. All material is available in Spanish and French as well as English, including instructions for using the manipulative, information about bases and place value, and suggested questions for classroom use.

Utah State University. National Library of Virtual Manipulatives for Interactive Mathematics

1999-01-01

301

Lower extremity nerve blocks.  

PubMed

Lower extremity nerve blocks have not become as popular as upper extremity blocks for anesthesia; however, the use of lower extremity nerve blocks will become more widespread, as teaching programs are now providing more regional anesthesia experiences for their trainees so that the anesthesia provider will have the familiarity to use these blocks. To increase the enthusiasm among our surgical colleagues, we must begin to use these blocks for surgery, and if the block must be supplemented with local anesthetic or a light general anesthetic, we must educate them that the block is not a failure but a success, as it will provide analgesia after surgery in a method of multimodal pain control. Lower extremity nerve blocks will become more popular when it is realized that they are an effective way of increasing operating room efficiency. Because the block may be placed in an induction room, there is no induction or emergence in the operating room. Patients may be discharged without the need for pain medications, thus lowering the incidence of nausea postoperatively and decreasing PACU and discharge times. PMID:10935013

Dilger, J A

2000-06-01

302

Protein based Block Copolymers  

PubMed Central

Advances in genetic engineering have led to the synthesis of protein-based block copolymers with control of chemistry and molecular weight, resulting in unique physical and biological properties. The benefits from incorporating peptide blocks into copolymer designs arise from the fundamental properties of proteins to adopt ordered conformations and to undergo self-assembly, providing control over structure formation at various length scales when compared to conventional block copolymers. This review covers the synthesis, structure, assembly, properties, and applications of protein-based block copolymers. PMID:21235251

Rabotyagova, Olena S.; Cebe, Peggy; Kaplan, David L.

2011-01-01

303

Data-Driven Implementation of Data Flow Diagrams  

Microsoft Academic Search

Current software engineering methods employ a variety of design notations and techniques during the development process. This paper suggests a new, unified approach to developing software, termed Program\\/System Design. Programs are viewed as being made up of systems of data-coupled, data-activated processing units. Using a coherent hierarchy of data flow diagrams, complex systems are specified as compositions of successively simpler

Robert G. Babb II; R. G. II

1982-01-01

304

A layout algorithm for data flow diagrams  

SciTech Connect

A layout algorithm is presented that allows the automatic drawing of data flow diagrams, a diagrammatic representation widely used in the functional analysis of information systems. A grid standard is defined for such diagrams, and aesthetics for a good readability are identified. The layout algorithm receives as input an abstract graph, specifying connectivity relations between the elements of the diagram, and produces as output a corresponding diagram according to the aesthetics. The basic strategy is to build incrementally the layout; first, a good topology is constructed with few crossings between edges; subsequently, the shape of the diagram is determined in terms of angles appearing along edges; and finally, dimensions are given to the graph, obtaining a grid skeleton for the diagram.

Batini, C.; Nardelli, E.; Tamassia, R.

1986-04-01

305

Variable stars across the observational HR diagram  

Microsoft Academic Search

An overview of pulsating variable stars across the observational Hertzprung-Russel (HR) diagram is presented, together with a summary of their global properties. The HR diagram is presented with a third colour-coded dimension, visualizing the fraction of variable, the amplitude of variability or the period of variability. The distribution of variable stars in the other observational diagrams, such as the Period-Amplitude

Laurent Eyer; Nami Mowlavi

2008-01-01

306

Object Flow Definition for Refined Activity Diagrams  

Microsoft Academic Search

Activity diagrams are a well-known means to model the control flow of system behavior. Their expressiveness can be enhanced\\u000a by using their object flow notation. In addition, we refine activities by pairs of pre- and post-conditions formulated by\\u000a interrelated object diagrams. To define a clear semantics for refined activity diagrams with object flow, we use a graph transformation\\u000a approach. Control

Stefan Jurack; Leen Lambers; Katharina Mehner; Gabriele Taentzer; Gerd Wierse

2009-01-01

307

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

308

Block and psychoticism  

Microsoft Academic Search

Argues that J. P. Block's (1977) criticisms of the Eysenck and Eysenck Adult Psychoticism Scale are one-sided and do not take into account all the evidence. It is also suggested that Block's criticisms center on a function not at all envisaged for the scale, that is, the discrimination of psychotics from normals and other nonpsychotic groups. The scale was constructed

Hans J. Eysenck; Sybil B. Eysenck

1977-01-01

309

Variable stars across the observational HR diagram  

E-print Network

An overview of pulsating variable stars across the observational Hertzprung-Russel (HR) diagram is presented, together with a summary of their global properties. The HR diagram is presented with a third colour-coded dimension, visualizing the fraction of variable, the amplitude of variability or the period of variability. The distribution of variable stars in the other observational diagrams, such as the Period-Amplitude diagram, is also presented. Some of the progresses performed in the field of variable stars during the last decade are briefly summarized, and future projects that will improve our knowledge of variable stars are mentioned.

Laurent Eyer; Nami Mowlavi

2007-12-21

310

Hofstadter Butterfly Diagram in Noncommutative Space  

E-print Network

We study an energy spectrum of electron moving under the constant magnetic field in two dimensional noncommutative space. It take place with the gauge invariant way. The Hofstadter butterfly diagram of the noncommutative space is calculated in terms of the lattice model which is derived by the Bopp's shift for space and by the Peierls substitution for external magnetic field. We also find the fractal structure in new diagram. Although the global features of the new diagram are similar to the diagram of the commutative space, the detail structure is different from it.

Hidenori Takahashi; Masanori Yamanaka

2006-06-23

311

Effect of Polymer Blocking Layer and Processing Method on the Breakdown Strength and the Extractable Energy Density of Barium Titanate/poly(vinylidene fluoride-co-hexafluoropropylene) Nanocomposite Thin Film Capacitors  

NASA Astrophysics Data System (ADS)

Polymer-metal oxide nanocomposites are of great interest because of their high energy density and easy processability, which make them candidate materials for energy storage applications. Although loading of high-k filler in polymer matrix is desirable to maximize energy density of nanocomposites, the decrease of breakdown strength at higher loading compromises a potential gain in energy density. In this work, we investigate the effect of a fluoropolymer (CYTOP) blocking layer in BaTiO3/poly(vinylidene fluoride-co-hexafluoro propylene) nanocomposite films on the improvement of breakdown strength and energy storage density. The introduction of blocking layer may serve to prevent moisture absorption and charge injection from electrode, thereby decreasing the probability of catastrophic breakdown events. We also examine the influence of processing method, i.e. spin- or blade-casting, on the performance of bilayer films. The charge-discharge method shows about a twofold increase in extractable energy density (from 2 to 3.7 J/cm^3) of bilayer films fabricated by blade-casting compared to single layer film by spin-casting because of improved breakdown strength. The results will be discussed in regards to morphology, electric field distribution, and loss of bilayer films.

Kim, Yunsang; Kathaperumal, Mohanalingam; Smith, O'neil; Pan, Ming-Jen; Perry, Joseph

2013-03-01

312

Phase diagram of ammonium nitrate  

NASA Astrophysics Data System (ADS)

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 N2, N2O, and H2O 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' 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

2013-12-01

313

Hubble's diagram and cosmic expansion  

NASA Astrophysics Data System (ADS)

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.

Kirshner, Robert P.

2004-01-01

314

Caenorhabditis elegans Cyclin B3 Is Required for Multiple Mitotic Processes Including Alleviation of a Spindle Checkpoint–Dependent Block in Anaphase Chromosome Segregation  

PubMed Central

The master regulators of the cell cycle are cyclin-dependent kinases (Cdks), which influence the function of a myriad of proteins via phosphorylation. Mitotic Cdk1 is activated by A-type, as well as B1- and B2-type, cyclins. However, the role of a third, conserved cyclin B family member, cyclin B3, is less well defined. Here, we show that Caenorhabditis elegans CYB-3 has essential and distinct functions from cyclin B1 and B2 in the early embryo. CYB-3 is required for the timely execution of a number of cell cycle events including completion of the MII meiotic division of the oocyte nucleus, pronuclear migration, centrosome maturation, mitotic chromosome condensation and congression, and, most strikingly, progression through the metaphase-to-anaphase transition. Our experiments reveal that the extended metaphase delay in CYB-3–depleted embryos is dependent on an intact spindle assembly checkpoint (SAC) and results in salient defects in the architecture of holocentric metaphase chromosomes. Furthermore, genetically increasing or decreasing dynein activity results in the respective suppression or enhancement of CYB-3–dependent defects in cell cycle progression. Altogether, these data reveal that CYB-3 plays a unique, essential role in the cell cycle including promoting mitotic dynein functionality and alleviation of a SAC–dependent block in anaphase chromosome segregation. PMID:21124864

Deyter, Gary M. R.; Furuta, Tokiko; Kurasawa, Yasuhiro; Schumacher, Jill M.

2010-01-01

315

On blocks with cyclic defect group and their head orders.  

E-print Network

such a block is determined by its planar embedded Brauer tree. Applying the radical idealiser process the head] gives a rather explicit description of blocks with cyclic defect group B = ZpG of p-adic group rings with cyclic defect group of group rings over discrete valuation rings. The fact that blocks of group rings

Nebe, Gabriele

316

A tutorial on flow diagrams: A tool for developing the structure of multicomponent phase diagrams  

Microsoft Academic Search

The tabular form of multiphase equilibria in temperature- or pressure-ordered sequence, often referred to as flow diagrams,\\u000a shows the interrelations that exist among the various types or classes of equilibria in a system. These interrelations establish\\u000a the structures of the various forms of phase diagrams. Flow diagrams have been used to simplify the presentation of complex\\u000a ternary phase diagrams. However,

R. G. Connell

1994-01-01

317

Evolution of Orogenic Blocking  

NASA Astrophysics Data System (ADS)

The evolution of low-level flow upstream of the Continental Divide (Rocky Mountains) from being blocked, i.e. unable to surmount the barrier, to becoming unblocked and blocked again is studied observationally and numerically. During two months in the winter of 1991/92 a transect of three wind profilers measured the wind field every few minutes. Three -dimensional numerical simulations with the Colorado State Regional Atmospheric Modeling System (RAMS) using realistic topography supplemented the observations with details of the blocked and unblocked flow. The results confirm the theory that a mountain -induced mesoscale high above the upwind slopes causes the blocking. While previous research of idealized situations focused on changes of the cross-barrier wind and stability as determining variables to build that mesoscale high, this study found synoptic and radiative forcing to drive the blocking evolution in the atmosphere. When the low -level flow was blocked by the mountain-induced mesoscale high a opposing synoptic cross-barrier pressure gradient could negate the mesoscale gradient. Therefore unblocking happened most frequently when the trough axis of a short wave was immediately upstream of the barrier, but sometimes synoptic pressure gradients caused by contrasts in vorticity and differential temperature advection were also strong enough to overpower the mesoscale pressure gradient. The flow returned to its blocked state when the ridge behind the trough approached the barrier so that the synoptic cross-barrier pressure gradient reinforced the mesoscale gradient. For a lower barrier or stronger solar insolation a well-mixed boundary layer could grow almost to the height of the barrier by afternoon and reconnect the blocked layer with the higher cross-barrier winds above the mountain. After sunset the radiative cooling stabilizes the lower atmosphere again and the transition back to the blocked state occurred. The transition between the two states happened rapidly on the order of an hour. A blocked flow event lasted on the average one and a half days. The depth of the blocked layer even during one blocking episode fluctuated considerably but never exceeded the height of the barrier.

Mayr, Georg Johann

318

31 CFR 541.301 - 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 ZIMBABWE SANCTIONS REGULATIONS General Definitions § 541.301 Blocked account; blocked property. The terms blocked...

2010-07-01

319

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

320

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

321

31 CFR 541.301 - 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 ZIMBABWE SANCTIONS REGULATIONS General Definitions § 541.301 Blocked account; blocked property. The terms blocked...

2012-07-01

322

31 CFR 541.301 - 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 ZIMBABWE SANCTIONS REGULATIONS General Definitions § 541.301 Blocked account; blocked property. The terms blocked...

2011-07-01

323

31 CFR 541.301 - 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 ZIMBABWE SANCTIONS REGULATIONS General Definitions § 541.301 Blocked account; blocked property. The terms blocked...

2013-07-01

324

31 CFR 541.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2014 CFR

... Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY ZIMBABWE SANCTIONS REGULATIONS General Definitions § 541.301 Blocked account; blocked property. The terms blocked...

2014-07-01

325

GPU-based optical propagation simulator of a laser-processed crystal block for the X'tal cube PET detector.  

PubMed

The X'tal cube is a next-generation DOI detector for PET that we are developing to offer higher resolution and higher sensitivity than is available with present detectors. It is constructed from a cubic monolithic scintillation crystal and silicon photomultipliers which are coupled on various positions of the six surfaces of the cube. A laser-processing technique is applied to produce 3D optical boundaries composed of micro-cracks inside the monolithic scintillator crystal. The current configuration is based on an empirical trial of a laser-processed boundary. There is room to improve the spatial resolution by optimizing the setting of the laser-processed boundary. In fact, the laser-processing technique has high freedom in setting the parameters of the boundary such as size, pitch, and angle. Computer simulation can effectively optimize such parameters. In this study, to design optical characteristics properly for the laser-processed crystal, we developed a Monte Carlo simulator which can model arbitrary arrangements of laser-processed optical boundaries (LPBs). The optical characteristics of the LPBs were measured by use of a setup with a laser and a photo-diode, and then modeled in the simulator. The accuracy of the simulator was confirmed by comparison of position histograms obtained from the simulation and from experiments with a prototype detector composed of a cubic LYSO monolithic crystal with 6 × 6 × 6 segments and multi-pixel photon counters. Furthermore, the simulator was accelerated by parallel computing with general-purpose computing on a graphics processing unit. The calculation speed was about 400 times faster than that with a CPU. PMID:23896989

Ogata, Yuma; Ohnishi, Takashi; Moriya, Takahiro; Inadama, Naoko; Nishikido, Fumihiko; Yoshida, Eiji; Murayama, Hideo; Yamaya, Taiga; Haneishi, Hideaki

2014-01-01

326

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

327

Labeled floor diagrams for plane curves  

Microsoft Academic Search

Floor diagrams are a class of weighted oriented graphs introduced by E. Brugalle and the second author. Tropical geometry arguments lead to combinatorial descriptions of (ordinary and relative) Gromov-Witten invariants of projective spaces in terms of floor diagrams and their generalizations. In a number of cases, these descriptions can be used to obtain explicit (direct or recursive) formulas for the

Sergey Fomin; Grigory Mikhalkin

2009-01-01

328

Empirical Validation of Class Diagram Metrics  

Microsoft Academic Search

As a key early artefact in the development of OO software, the quality of class diagrams is crucial for all later design work and could be a major determinant for the quality of the software product that is finally delivered. Quantitative measurement instruments are useful to assess class diagram quality in an objective way, thus avoiding bias in the quality

Marcela Genero; Mario Piattini; Coral Calero

2002-01-01

329

Timing Diagrams: Formalization and Algorithmic Verification  

E-print Network

generated by B¨uchi automata in timing diagram languages is decidable. The result relies on a correlation foundation for both reasoning and theoretical analyses. This paper presents a timing dia­ gram logicTiming Diagrams: Formalization and Algorithmic Verification Kathi Fisler \\Lambda Department

Fisler, Kathryn

330

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

331

Resummation of Cactus Diagrams in Lattice QCD  

E-print Network

We show how to perform a resummation, to all orders in perturbation theory, of a certain class of gauge invariant diagrams in Lattice QCD. These diagrams are often largely responsible for lattice artifacts. Our resummation leads to an improved perturbative expansion. Applied to a number of cases of interest, this expansion yields results remarkably close to corresponding nonperturbative estimates.

H. Panagopoulos; E. Vicari

1998-06-08

332

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

333

Penrose diagram for a transient black hole  

Microsoft Academic Search

A Penrose diagram is constructed for a spatially coherent black hole that smoothly begins an accretion, and then excretes symmetrically as measured by a distant observer, with the initial and final states described by a metric of the Minkowski form. Coordinate curves on the diagram are computationally derived. Causal relationships between spacetime regions are briefly discussed. The life cycle of

James Lindesayand; Paul Sheldon

2010-01-01

334

Building Path Diagrams for Multilevel Models  

ERIC Educational Resources Information Center

Multilevel models have come to play an increasingly important role in many areas of social science research. However, in contrast to other modeling strategies, there is currently no widely used approach for graphically diagramming multilevel models. Ideally, such diagrams would serve two functions: to provide a formal structure for deriving the…

Curran, Patrick J.; Bauer, Daniel J.

2007-01-01

335

Formalizing Spider Diagrams Joseph (Yossi) Gil  

E-print Network

]. The Swiss mathemati- cian Leonhard Euler (1707-1783) introduced the notation we now call Euler circles (or- lar and intuitive Venn diagrams and Euler circles. The language design emphasized scalability Euler diagrams) [1] to illus- trate relations between sets. This notation uses the topo- logical

Kent, University of

336

Abstract Voronoi Diagrams Revisited Elmar Langetepe  

E-print Network

bisectors have infinitely many intersections, so that it was not covered by the existing AVD theory Voronoi Diagrams (AVDs) were introduced by the first author in [20], as a unifying concept for both, structure theory and algorithmic computation. The basic observation behind AVDs was that Voronoi diagrams

Klein, Rolf

337

A Formal Semantics of Data Flow Diagrams  

Microsoft Academic Search

semantics Abstract. This paper presents a formal semantics of data flow diagrams as used in Structured Analysis, based on an abstract model for data flow transformations. The semantics consists of a collection of VDM functions, transforming an abstract syntax representation of a data flow diagram into an abstract syntax representation of a VDM specification. Since this transformation is executable, it

338

Local helioseismology using ring diagram analysis  

Microsoft Academic Search

Ring diagram analysis is an extension of global helioseismology that is applied to small areas on the Sun. It can be used to infer the horizontal components of large scale flows as well as the structure, and variations thereof, in the outer convection zone. We describe below the ring-diagram analysis technique, and some results obtained using this technique.

H. M. Antia; S. Basu

2007-01-01

339

Architecture flow diagrams under teamwork reg sign  

Microsoft Academic Search

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.

Nicinski

1992-01-01

340

HMI ring diagram analysis II. Data products  

Microsoft Academic Search

The combination of high resolution, spatial coverage, and continuity of photospheric Doppler and other data from HMI has allowed us to embark on a program of systematic exploration of solar subsurface flows and thermal structure variations using the technique of ring-diagram analysis on an unprecedented scale. There are two ring-diagrams pipelines, as described in [1]. In this paper we discuss

R. S. Bogart; C. Baldner; S. Basu; D. A. Haber; M. C. Rabello-Soares

2011-01-01

341

Chord Diagrams and Coxeter Links Eriko Hironaka  

E-print Network

Chord Diagrams and Coxeter Links Eriko Hironaka April 23, 2003 Abstract This paper presents a construction of #12;bered links (K; #6;) out of chord diagrams L. Let be the incidence graph of L. Under; S). Lehmer's problem is solved for the monodromy of these Coxeter links. 1 1 Introduction A chord

Hironaka, Eriko

342

Chord Diagrams and Coxeter Links Eriko Hironaka  

E-print Network

Chord Diagrams and Coxeter Links Eriko Hironaka February 28, 2003 Abstract This paper presents a construction of #12;bered links (K; #6;) out of chord diagrams L. Let be the incidence graph of L. Under; S). Lehmer's problem is solved for the monodromy of these Coxeter links. 1 1 Introduction A chord

Aluffi, Paolo

343

The mechanism of unresponsiveness to circulating tumor antigen MUC1 is a block in intracellular sorting and processing by dendritic cells.  

PubMed

Immunity to tumor Ags in patients is typically weak and not therapeutic. We have identified a new mechanism by which potentially immunogenic glycoprotein tumor Ags, such as MUC1, fail to stimulate strong immune responses. MUC1 is a heavily glycosylated membrane protein that is also present in soluble form in sera and ascites of cancer patients. We show that this soluble protein is readily taken up by dendritic cells (DC), but is not transported to late endosomes or MHC class II compartments for processing and binding to class II MHC. MUC1 uptake is mediated by the mannose receptor, and the protein is then retained long term in early endosomes without degradation. Long-term retention of MUC1 does not interfere with the ability of DC to process and present other Ags. We also demonstrate inhibited processing of another important glycoprotein tumor Ag, HER-2/neu. This may, therefore, be a frequent obstacle to presentation of tumor Ags and an important consideration in the design of cancer vaccines. It should be possible to overcome this obstacle by providing DC with a form of tumor Ag that can be better processed. For MUC1 we show that a 140-aa-long synthetic peptide is very efficiently processed by DC. PMID:11034378

Hiltbold, E M; Vlad, A M; Ciborowski, P; Watkins, S C; Finn, O J

2000-10-01

344

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

345

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

346

Types of Heart Block  

MedlinePLUS

... is less serious than Mobitz type II. The animation below shows how your heart's electrical system works. ... block. Click the "start" button to play the animation. Written and spoken explanations are provided with each ...

347

Mid-Career Block.  

ERIC Educational Resources Information Center

Considers typical reactions of midcareer employees to blocked opportunity; reasons for correcting these attitudes; ways of motivating these employees; methods of rekindling midcareer employees' interest in their jobs; encouraging competition; job switching; self-development programs; and supervisory attitudes. (CT)

Payne, Richard A.

1984-01-01

348

Resolving writer's block.  

PubMed Central

PROBLEM BEING ADDRESSED: Writer's block, or a distinctly uncomfortable inability to write, can interfere with professional productivity. OBJECTIVE OF PROGRAM: To identify writer's block and to outline suggestions for its early diagnosis, treatment, and prevention. MAIN COMPONENTS OF PROGRAM: Once the diagnosis has been established, a stepwise approach to care is recommended. Mild blockage can be resolved by evaluating and revising expectations, conducting a task analysis, and giving oneself positive feedback. Moderate blockage can be addressed by creative exercises, such as brainstorming and role-playing. Recalcitrant blockage can be resolved with therapy. Writer's block can be prevented by taking opportunities to write at the beginning of projects, working with a supportive group of people, and cultivating an ongoing interest in writing. CONCLUSIONS: Writer's block is a highly treatable condition. A systematic approach can help to alleviate anxiety, build confidence, and give people the information they need to work productively. PMID:9481467

Huston, P.

1998-01-01

349

Superalloy Lattice Block Structures  

NASA Technical Reports Server (NTRS)

Initial investigations of investment cast superalloy lattice block suggest that this technology will yield a low cost approach to utilize the high temperature strength and environmental resistance of superalloys in lightweight, damage tolerant structural configurations. Work to date has demonstrated that relatively large superalloy lattice block panels can be successfully investment cast from both IN-718 and Mar-M247. These castings exhibited mechanical properties consistent with the strength of the same superalloys measured from more conventional castings. The lattice block structure also accommodates significant deformation without failure, and is defect tolerant in fatigue. The potential of lattice block structures opens new opportunities for the use of superalloys in future generations of aircraft applications that demand strength and environmental resistance at elevated temperatures along with low weight.

Nathal, M. V.; Whittenberger, J. D.; Hebsur, M. G.; Kantzos, P. T.; Krause, D. L.

2004-01-01

350

Cellular FLICE-inhibitory protein (cFLIP) isoforms block CD95- and TRAIL death receptor-induced gene induction irrespective of processing of caspase-8 or cFLIP in the death-inducing signaling complex.  

PubMed

Death receptors (DRs) induce apoptosis but also stimulate proinflammatory "non-apoptotic" signaling (e.g. NF-?B and mitogen-activated protein kinase (MAPK) activation) and inhibit distinct steps of DR-activated maturation of procaspase-8. To examine whether isoforms of cellular FLIP (cFLIP) or its cleavage products differentially regulate DR signaling, we established HaCaT cells expressing cFLIP(S), cFLIP(L), or mutants of cFLIP(L) (cFLIP(D376N) and cFLIP(p43)). cFLIP variants blocked TRAIL- and CD95L-induced apoptosis, but the cleavage pattern of caspase-8 in the death inducing signaling complex was different: cFLIP(L) induced processing of caspase-8 to the p43/41 fragments irrespective of cFLIP cleavage. cFLIP(S) or cFLIP(p43) blocked procaspase-8 cleavage. Analyzing non-apoptotic signaling pathways, we found that TRAIL and CD95L activate JNK and p38 within 15 min. cFLIP variants and different caspase inhibitors blocked late death ligand-induced JNK or p38 MAPK activation suggesting that these responses are secondary to cell death. cFLIP isoforms/mutants also blocked death ligand-mediated gene induction of CXCL-8 (IL-8). Knockdown of caspase-8 fully suppressed apoptotic and non-apoptotic signaling. Knockdown of cFLIP isoforms in primary human keratinocytes enhanced CD95L- and TRAIL-induced NF-?B activation, and JNK and p38 activation, underscoring the regulatory role of cFLIP for these DR-mediated signals. Whereas the presence of caspase-8 is critical for apoptotic and non-apoptotic signaling, cFLIP isoforms are potent inhibitors of TRAIL- and CD95L-induced apoptosis, NF-?B activation, and the late JNK and p38 MAPK activation. cFLIP-mediated inhibition of CD95 and TRAIL DR could be of crucial importance during keratinocyte skin carcinogenesis and for the activation of innate and/or adaptive immune responses triggered by DR activation in the skin. PMID:21454681

Kavuri, Shyam M; Geserick, Peter; Berg, Daniela; Dimitrova, Diana Panayotova; Feoktistova, Maria; Siegmund, Daniela; Gollnick, Harald; Neumann, Manfred; Wajant, Harald; Leverkus, Martin

2011-05-13

351

Browsing large image datasets through Voronoi diagrams.  

PubMed

Conventional browsing of image collections use mechanisms such as thumbnails arranged on a regular grid or on a line, often mounted over a scrollable panel. However, this approach does not scale well with the size of the datasets (number of images). In this paper, we propose a new thumbnail-based interface to browse large collections of images. Our approach is based on weighted centroidal anisotropic Voronoi diagrams. A dynamically changing subset of images is represented by thumbnails and shown on the screen. Thumbnails are shaped like general polygons, to better cover screen space, while still reflecting the original aspect ratios or orientation of the represented images. During the browsing process, thumbnails are dynamically rearranged, reshaped and rescaled. The objective is to devote more screen space (more numerous and larger thumbnails) to the parts of the dataset closer to the current region of interest, and progressively lesser away from it, while still making the dataset visible as a whole. During the entire process, temporal coherence is always maintained. GPU implementation easily guarantees the frame rates needed for fully smooth interactivity. PMID:20975166

Brivio, Paolo; Tarini, Marco; Cignoni, Paolo

2010-01-01

352

Evolution of Orogenic Blocking  

Microsoft Academic Search

The evolution of low-level flow upstream of the Continental Divide (Rocky Mountains) from being blocked, i.e. unable to surmount the barrier, to becoming unblocked and blocked again is studied observationally and numerically. During two months in the winter of 1991\\/92 a transect of three wind profilers measured the wind field every few minutes. Three -dimensional numerical simulations with the Colorado

Georg Johann Mayr

1993-01-01

353

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. PMID:25435863

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

2014-01-01

354

Numerical simulation of nonperiodic rail operation diagram characteristics.  

PubMed

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. PMID:25435863

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

2014-01-01

355

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

356

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

357

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

358

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

359

The morphological diagram of spinels  

SciTech Connect

Catalytic anisotropy in mild oxidation reactions results from the varying activity of different crystal faces. Here, spinels exposing (100), (110), and (111) faces have been considered and their Curie-Wulff plots have been drawn, admitting that the relative G(hkl) surface free energies may change in a wide range as a function of composition, inversion, and segregation degree. The normalized free surface energies are defined as A = G(100)/G(111), B = G(110)/G(111), and C = G(111)/G(111) = 1 = const. This made it possible to construct bidimensional morphological diagrams (morphology = f(A,B) at C = const) in the exposed-face-type, solid-type, and exposure-percentage versions. Eleven morphological habits of grains have been identified, including (100)-cube, (110)-dodecahedron, (111)-hexagons, 18-hedron, 20-hedron, and up to 26-hedra bordered with (i) 6 (100)-octagons, 12 (110)-rectangles, and 8 (111)-hexagons, (ii) 6 (100)-squares, 12 (110)-rectangles, and 8 (111)-triangles, or (iii) 6 (100)-squares, 12 (110)-octagons, and 8 (100)-triangles. The analysis is valid for all compounds crystallizing in the cubic system and preferentially exposing the three enumerated faces.

Ziolkowski, J. [Institute of Catalysis and Surface Chemistry, Krakow (Poland)] [Institute of Catalysis and Surface Chemistry, Krakow (Poland)

1996-02-01

360

Towards the QCD phase diagram  

E-print Network

We summarize our recent results on the phase diagram of QCD with N_f=2+1 quark flavors, as a function of temperature T and quark chemical potential \\mu. Using staggered fermions, lattices with temporal extent N_t=4, and the exact RHMC algorithm, we first determine the critical line in the quark mass plane (m_{u,d},m_s) where the finite temperature transition at \\mu=0 is second order. We confirm that the physical point lies on the crossover side of this line. Our data are consistent with a tricritical point at (m_{u,d},m_s) = (0,\\sim 500) MeV. Then, using an imaginary chemical potential, we determine in which direction this second-order line moves as the chemical potential is turned on. Contrary to standard expectations, we find that the region of first-order transitions shrinks in the presence of a chemical potential, which is inconsistent with the presence of a QCD critical point at small chemical potential. The emphasis is put on clarifying the translation of our results from lattice to physical units, and on discussing the apparent contradiction of our findings with earlier lattice studies.

Philippe de Forcrand; Owe Philipsen

2006-11-22

361

Geospatial Cluster Tessellation Through the Complete Order k Voronoi Diagrams  

Microsoft Academic Search

In this paper, we propose a postclustering process that robustly computes cluster regions at different levels of granularity\\u000a through the complete Order-k Voronoi diagrams. The robustness and flexibility of the proposed method overcome the application-dependency and rigidity\\u000a of traditional approaches. The proposed cluster tessellation method robustly models monotonic and nonmonotonic cluster growth,\\u000a and provides fuzzy membership in order to represent

Ickjai Lee; Reece Pershouse; Kyungmi Lee

2007-01-01

362

The Image Whole and the Image Eye Diagram [IED  

Microsoft Academic Search

\\u000a The work presents a holistic view of the image field, a field that centers on Image Processing. The Image Eye Diagram [IED]\\u000a has taken shape as a result. The alternative model structure of the Image Puzzle offers a way to facilitate a synthesis of\\u000a the different fields related to image. It thus leads to an integrated development of the individual

Nikolaos E. Myridis

363

TECHNIQUES FOR THE COMPARATIVE ANALYSIS OF DATA FLOW DIAGRAMS  

Microsoft Academic Search

This paper presents an analytic framework for comparing data flowdiagrams based on five dimensions: control points, process automation,data aggregation, resource usage, and raw counts. Our goal wasto develop some simple quantitative metrics that are appropriate forcomputer-aided system development tools. In addition, we argue forcomputer-aided tools that support the tandem development of alternativesystem diagrams. Simultaneous development of competing system descriptions may

Donald J. Berndt

1993-01-01

364

Intelligent drug delivery system using UML diagrams analysis  

Microsoft Academic Search

A novel intelligent drug delivery system potential for the more effective therapy of the diabetics was proposed, and the composition\\u000a of system was analyzed. Based on the design of micro-electro-mechanical systems (MEMS), an iterative modeling process was\\u000a introduced. Unified modeling language (UML) was employed to describe the function requirement, and different diagrams were\\u000a built up to explore the static model,

Qi-feng Cui; Cheng-liang Liu; Xuan F. Zha

2008-01-01

365

A substitution at His-120 in the LasA protease of Pseudomonas aeruginosa blocks enzymatic activity without affecting propeptide processing or extracellular secretion.  

PubMed Central

The LasA protease of Pseudomonas aeruginosa can degrade elastin and is an important contributor to the pathogenesis of this organism. LasA (20 kDa) is a member of the beta-lytic endopeptidase family of extracellular bacterial proteases, and it shows high-level staphylolytic activity. We sequenced the lasA gene from strain FRD1 and overexpressed it in Escherichia coli. The lasA gene encodes a precursor, known as pre-proLasA, of 45,582 Da. Amino-terminal sequence analysis allowed the identification of the signal peptidase cleavage site and revealed that the 31-amino-acid signal peptide was removed in E. coli. The remaining proLasA (42 kDa) did not undergo autoproteolytic processing and showed little staphylolytic activity. However, it was readily processed to a 20-kDa active staphylolytic protease by incubation with trypsin or with the culture filtrate of a P. aeruginosa lasAdelta mutant. Thus, removal of the propeptide (22 kDa) was required to convert proLasA into an active protease. Although LasA protease was critical for staphylolytic activity, other proteases like elastase were found to enhance staphylolysis. Under the control of an inducible trc promoter, lasA was overexpressed in P. aeruginosa and the processing intermediates were examined. Compared with wild-type cells, the overproducing cells accumulated more 42-kDa proLasA species, and the culture supernatants of the overproducing cells showed increased levels of active 20-kDa LasA protease. Small amounts of a 25-kDa extracellular LasA-related protein, which could represent a potential processing intermediate, were also observed. To better understand the structure-function relationships in LasA protease, we tested whether His-120-X-His-122 in the mature portion of LasA plays a role in activity. This motif and surrounding sequences are conserved in the related beta-lytic protease of Achromobacter lyticus. Oligonucleotide-directed mutagenesis was used to change His-120 to Ala-120, thus forming the lasA5 allele. The product of lasA5 expressed from the chromosome of P. aeruginosa was processed to a stable, secreted 20-kDa protein (designated LasA-H120A) which was devoid of staphylolytic activity. This suggests that His-120 is essential for LasA activity and favors the possibility that proLasA processing and secretion in P. aeruginosa can proceed via mechanisms which do not involve autoproteolysis. PMID:8932318

Gustin, J K; Kessler, E; Ohman, D E

1996-01-01

366

Deformation behavior of cylindrical block copolymer bicrystals : pathway to understanding block copolymer grain boundaries  

E-print Network

Model bicrystals made by adhering pieces of near-single-crystal styrene-isoprene-styrene (SIS) cylindrical block copolymer (BCP), produced by a roll-casting process; yield various types of pure tilt grain boundaries. The ...

Wanakamol, Panitarn

2006-01-01

367

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

368

The amplituhedron from momentum twistor diagrams  

NASA Astrophysics Data System (ADS)

We propose a new diagrammatic formulation of the all-loop scattering amplitudes/Wilson loops in planar = 4 SYM, dubbed the "momentum-twistor diagrams". These are on-shell-diagrams obtained by gluing trivalent black and white vertices 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 the latter involve isolated bubble-structures for loop variables arising from forward limits, or the entangled removal of particles. From each diagram, the generalized "boundary measurement" directly gives the C, D matrices, thus a cell in the amplituhedron associated with the amplitude, and we expect that our diagrammatic representations of the amplitude provide triangulations of the amplituhedron. To demonstrate the computational power of the formalism, we give explicit results for general two-loop integrands, and the cells of the amplituhedron for two-loop MHV amplitudes.

Bai, Yuntao; He, Song

2015-02-01

369

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

370

Breviz: Visualizing Spreadsheets using Dataflow Diagrams  

E-print Network

Spreadsheets are used extensively in industry, often for business critical purposes. In previous work we have analyzed the information needs of spreadsheet professionals and addressed their need for support with the transition of a spreadsheet to a colleague with the generation of data flow diagrams. In this paper we describe the application of these data flow diagrams for the purpose of understanding a spreadsheet with three example cases. We furthermore suggest an additional application of the data flow diagrams: the assessment of the quality of the spreadsheet's design.

Hermans, Felienne; van Deursen, Arie

2011-01-01

371

The cost of blocking the mirror generalization process in reading: evidence for the role of inhibitory control in discriminating letters with lateral mirror-image counterparts.  

PubMed

Mirror generalization is detrimental for identifying letters with lateral mirror-image counterparts ('b/d'). In the present study, we investigated whether the discrimination of this type of letters in expert readers might be rooted in the ability to inhibit the mirror-generalization process. In our negative priming paradigm, participants judged whether two letters were identical on the prime and two animals (or buildings) were identical on the probe. In Experiment 1, participants required more time when determining that two animals (but not two buildings) were mirror images of each other when preceded by letters with mirror-image counterparts than without mirror-image counterparts ('a/h'). In Experiment 2, we replicated the results with different letters without mirror-image counterparts and with the type of probe stimuli (animal or building) manipulated as a within-subject factors. Our results suggest that expert readers never completely "unlearn" the mirror-generalization process and still need to inhibit this heuristic to overcome mirror errors. PMID:24853536

Borst, Grégoire; Ahr, Emmanuel; Roell, Margot; Houdé, Olivier

2015-02-01

372

Impression block with orientator  

NASA Astrophysics Data System (ADS)

Tool review, namely the impression block, applied to check the shape and size of the top of fish as well as to determine the appropriate tool for fishing operation was realized. For multiple application and obtaining of the impress depth of 3 cm and more, the standard volumetric impression blocks with fix rods are used. However, the registered impress of fish is not oriented in space and the rods during fishing are in the extended position. This leads to rods deformation and sinking due to accidental impacts of impression block over the borehole irregularity and finally results in faulty detection of the top end of fishing object in hole. The impression blocks with copy rods and fixed magnetic needle allow estimating the object configuration and fix the position of magnetic needle determining the position of the top end of object in hole. However, the magnetic needle fixation is realized in staged and the rods are in extended position during fishing operations as well as it is in standard design. The most efficient tool is the impression block with copy rods which directs the examined object in the borehole during readings of magnetic needles data from azimuth plate and averaging of readings. This significantly increases the accuracy of fishing toll direction. The rods during fishing are located in the body and extended only when they reach the top of fishing object.

Brilin, V. I.; Ulyanova, O. S.

2015-02-01

373

Stacked Blocks Tutorial Written by Michael Tonks  

E-print Network

Stacked Blocks Tutorial For ME 577 Written by Michael Tonks #12;CE/TOL Stacked Blocks TutorialStacked Blocks TutorialStacked Blocks TutorialStacked Blocks Tutorial 2 TABLE OF CONTENTSTABLE OF CONTENTSTABLE:.................................................................................................................15 #12;CE/TOL Stacked Blocks TutorialStacked Blocks TutorialStacked Blocks TutorialStacked Blocks

374

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

375

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

376

Random Block Operators  

NASA Astrophysics Data System (ADS)

We study fundamental spectral properties of random block operators that are common in the physical modelling of mesoscopic disordered systems such as dirty superconductors. Our results include ergodic properties, the location of the spectrum, existence and regularity of the integrated density of states, as well as Lifshits tails. Special attention is paid to the peculiarities arising from the block structure such as the occurrence of a robust gap in the middle of the spectrum. Without randomness in the off-diagonal blocks the density of states typically exhibits an inverse square-root singularity at the edges of the gap. In the presence of randomness we establish a Wegner estimate that is valid at all energies. It implies that the singularities are smeared out by randomness, and the density of states is bounded. We also show Lifshits tails at these band edges. Technically, one has to cope with a non-monotone dependence on the random couplings.

Kirsch, Werner; Metzger, Bernd; Müller, Peter

2011-06-01

377

ConcepTest: Relative Time Diagram #3  

NSDL National Science Digital Library

Match the features in the relative time diagram below with the events described in the short sentence. Assume all rocks are sedimentary unless otherwise indicated. Which unit is composed of granite and older than ...

378

A Phase Diagram for Solar Flares  

NASA Astrophysics Data System (ADS)

Using the data from the NOAA/GOES X-ray observations of ~50,000 flares, we develop a Phase Diagram for solar flares. Such a Solar Flare Phase Diagram helps to trace the underlying energy structure of solar flares, and provides a prediction framework. The temperature (maximum ratio of short (0.5 – 4 A) to long band (1-8 A) band) and background solar x-ray radiation (at 1-8 A band) forms the basis of the phase diagram. Using the phase diagram and relevant statistical analysis, we derive insights into the eruptive nature of flares during the solar-cycle ramp (ramp up to and ramp down from solar maximum) phases and peak phase of the solar cycle.

Balasubramaniam, K. S.; Winter, Lisa; Pernak, Rick

2015-04-01

379

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

380

Sequential Influence Diagrams: A Unified Asymmetry Framework  

E-print Network

We describe a new graphical language for specifying asymmetric decision problems. The language is based on a filtered merge of several existing languages including sequential valuation networks, asymmetric influence diagrams, ...

Jensen, Finn V.; Nielsen, Thomas D.; Shenoy, Prakash P.

2004-10-01

381

An Improved Mnemonic Diagram for Thermodynamic Relationships.  

ERIC Educational Resources Information Center

Considers pressure, volume, entropy, temperature, Helmholtz free energy, Gibbs free energy, enthalpy, and internal energy. Suggests the mnemonic diagram is for use with simple systems that are defined as macroscopically homogeneous, isotropic, uncharged, and chemically inert. (MVL)

Rodriguez, Joaquin; Brainard, Alan J.

1989-01-01

382

Voronoi diagram generation on the ellipsoidal earth  

NASA Astrophysics Data System (ADS)

Voronoi diagram on the earth surface is a powerful tool to study spatial proximity at continental or global scale. However, its computation remains challenging because geospatial features have complex shapes. This paper presents a raster-based algorithm to generate Voronoi diagrams on earth's surface. The algorithm approximates the exact point-to-point geographical distances using the cell-to-cell geographical distances calculated by a geographical distance transform. The result is a distance image on which Voronoi diagram is delineated. Compared to existing methods, the proposed algorithm calculates geographical distances based on an earth ellipsoid and allows Voronoi generators to take complex shapes. Most importantly, its approximation error is bounded thus enabling users to control the accuracy of the Voronoi diagram through grid resolution.

Hu, Hai; Liu, XiaoHang; Hu, Peng

2014-12-01

383

Sloan Digital Sky Survey - Hubble Diagram  

NSDL National Science Digital Library

This website, containing information from the Sloan Digital Sky Survey, provides projects and activities for advanced astronomy students. In this particular one, the user retraces Edwin Hubble's steps to discover that the Universe is expanding, by making a Hubble Diagram.

384

Minimum Energy Diagrams for Multieffect Distillation Arrangements  

E-print Network

Minimum Energy Diagrams for Multieffect Distillation Arrangements Hilde K. Engelien and Sigurd distillation arrangements for separating a ternary mixture have been considered. The focus is on a heat-integrated complex distillation configuration, called a multieffect prefractionator arrangement. The comparison

Skogestad, Sigurd

385

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. PMID:25247200

Wan, Qing; Wei, Ling

2014-01-01

386

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

387

Anomalous atmospheric flows and blocking  

Microsoft Academic Search

Papers are presented on global scale circulations, the life cycles of persistent anomalies and blocking over the North Pacific, atmospheric blocking types and blocking numbers, observational characteristics of atmospheric planetary waves with bimodal amplitude distributions, and a study of eddy forcing during an Atlantic blocking episode. Topics discussed include the effect of local baroclinic instability on zonal inhomogeneities of vorticity

R. Benzi; A. C. Wiin-Nielson

1986-01-01

388

Semantic annotation of requirements for automatic UML class diagram generation  

E-print Network

The increasing complexity of software engineering requires effective methods and tools to support requirements analysts' activities. While much of a company's knowledge can be found in text repositories, current content management systems have limited capabilities for structuring and interpreting documents. In this context, we propose a tool for transforming text documents describing users' requirements to an UML model. The presented tool uses Natural Language Processing (NLP) and semantic rules to generate an UML class diagram. The main contribution of our tool is to provide assistance to designers facilitating the transition from a textual description of user requirements to their UML diagrams based on GATE (General Architecture of Text) by formulating necessary rules that generate new semantic annotations.

Amdouni, Soumaya; Bouabid, Sondes

2011-01-01

389

Failure Diagram and Chemical Driving Forces for Subcritical Crack Growth  

NASA Astrophysics Data System (ADS)

Kitagawa-Takahashi diagram that is modified for fatigue is now extended to the subcritical crack growth behavior under stress-corrosion crack growth. The analogy with the fatigue helps us to identify several regimes of interest from both the point of understanding of the material behavior as well as quantification of the failure process for structural design of components that are subjected to stress-corrosion and corrosion fatigue crack growths and failure. In particular, the diagram provides a means of defining the mechanical equivalent of chemical stress concentration factor and the chemical crack-tip driving forces to crack growth or its arrest. In addition, threshold stresses, crack arrest, and nonpropagating crack growth conditions can be defined, which help in developing sound design methodology against stress corrosion and corrosion fatigue. Chemical crack driving forces under corrosion fatigue can be similarly defined using the inert behavior as a reference.

Sadananda, K.

2013-03-01

390

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

391

Steps toward a radio HR diagram  

Microsoft Academic Search

We discuss the possibility of establishing a set of observational parameters for radio galaxies which could be used to study radio source evolution in the same way that the Hertzsprung-Russell diagram is used to understand stellar evolution. As a first step towards a radio H-R diagram, we show that the FRI\\/II break is a function of both radio and optical

Frazer Owen

392

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

393

A universal structured-design diagramer  

NASA Technical Reports Server (NTRS)

Program (FLOWCHARTER) generates standardized flowcharts and concordances for development and debugging of programs in any language. User describes programming-language grammar, providing syntax rules in Backus-Naur form (BNF), list of semantic rules, and set of concordance rules. Once grammar is described, user supplies only source code of program to be diagrammed. FLOWCHARTER automatically produces flow diagram and concordance. Source code for program is written for PASCAL Release 2 compiler, as distributed by University of Minnesota.

1981-01-01

394

Implications of Cladistics: Understanding Branching Diagrams  

NSDL National Science Digital Library

This site explains how a cladogram is formed and its implications. The cladogram is compared to a family tree, however unlike family trees, ancestors in cladistics ideally give rise to only two descendent species. Also unlike family trees, new species form from splitting of old species. Three possible diagrams showing the relationship between humans, gorillas, baboons, and chimpanzees are demonstrated. The author explains why one diagram is favored and also explains the meaning of nodes and clades.

395

Drawing conformal diagrams for a fractal landscape  

Microsoft Academic Search

Generic models of cosmological inflation and the recently proposed scenarios of a recycling universe and the string theory landscape predict spacetimes whose global geometry is a stochastic, self-similar fractal. To visualize the complicated causal structure of such a universe, one usually draws a conformal (Carter-Penrose) diagram. I develop a new method for drawing conformal diagrams, applicable to arbitrary 1+1-dimensional spacetimes.

Sergei Winitzki; Sergei

2005-01-01

396

Sets and The Venn Diagram (Beginner)  

NSDL National Science Digital Library

This lesson is designed to introduce students to sets, what it means to be part of a set, and how Venn diagrams relate to sets. This lesson provides links to discussions and activities related to sets and Venn diagrams as well as suggested ways to integrate them into the lesson. Finally, the lesson provides links to follow-up lessons designed for use in succession with the current one.

2011-05-23

397

Class diagram based evaluation of software performance  

NASA Astrophysics Data System (ADS)

The evaluation of software performance in the early stages of the software life cycle is important and it has been widely studied. In the software model specification, class diagram is the important object-oriented software specification model. The measures based on a class diagram have been widely studied to evaluate quality of software such as complexity, maintainability, reuse capability, etc. However the software performance evaluation based on Class model has not been widely studied, especially for object-oriented design of embedded software. Therefore, in this paper we propose a new approach to directly evaluate the software performance based on class diagrams. From a class diagram, we determine the parameters which are used to evaluate and build formula of the measures such as Size of Class Variables, Size of Class Methods, Size of Instance Variables, Size of Instance Methods, etc. Then, we do analysis of the dependence of performance on these measures and build the performance evaluation function from class diagram. Thereby we can choose the best class diagram based on this evaluation function.

Pham, Huong V.; Nguyen, Binh N.

2013-03-01

398

TESTING AND ANALYZING ON PV DIAGRAM OF CO2 ROLLING PISTON EXPANDER  

Microsoft Academic Search

Developing high efficient expander replacing throttle valve is one of the effective methods of improving performance of CO2 trans-critical refrigeration cycle. Testing on P-T and P-V diagram of CO2 rolling piston expander is discussed. The results show that expansion work in P-V diagram agree with practical recovery power. It is also shown that three different expansion processes can be occurred

Xianyang ZENG; Yitai MA; Shengchun LIU; Hongli WANG

399

Getting With It: Flow Diagrams  

ERIC Educational Resources Information Center

The use of flow charts in the teaching of college mathematics enhances students' understanding of mathematical processes. Used appropriately in elementary and secondary schools they could also nurture understanding of algorithms. (SD)

Ritchie, W. A.

1975-01-01

400

The Block Cipher Square  

Microsoft Academic Search

be Abstract. In this paper we present a new 128-bit block cipher called Square. The original design of Square concentrates on the resistance against dierential and linear cryptanalysis. However, after the initial design a dedicated attack was mounted that forced us to augment the numberofrounds.Thegoal ofthispaperisthepublicationoftheresult- ingcipherforpublicscrutiny.ACimplementationof

Joan Daemen; Lars R. Knudsen; Vincent Rijmen

1997-01-01

401

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

402

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.

403

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...

404

The monochromatic block number  

Microsoft Academic Search

In 1993 Voloshin introduced the concept of mixed hypergraph. A mixed hypergraph is characterised by the fact that it possesses anti-edges as well as edges. In a colouring of a mixed hypergraph, every anti-edge has at least two vertices of the same colour. In this paper a new parameter is introduced: the monochromatic block number mb. It is the number

Lorenzo Milazzo

1997-01-01

405

A target recognition method based on blocking partition and FM-TS network technology  

Microsoft Academic Search

Aiming at the special need of image processing in imaging fuze, a feature extraction method based on blocking partition to target image is studied. The image can be divided into several blocks according to their connectivity and changing trends. The structure features of each block and the relationship with other blocks are extracted. In order to recognize the conditions of

Keyong Wang; Chengtian Song; Jiahao Deng

2010-01-01

406

Self-assembly Behavior and Crystallization of a Low Molecular Weight Double Crystalline Polyethylene-block-Poly(ethylene oxide) Diblock Copolymer  

NASA Astrophysics Data System (ADS)

The self-assembly behavior and crystallization of a well-defined low molecular weight polyethylene-block-poly(ethylene oxide) (PE-b-PEO) diblock copolymer was studied. The Flory-Huggins interaction parameter (chi) was determined by temperature-dependent small angle X-ray scattering (SAXS) as chi = 14.82/T + 0.104. Upon slow heating, the crystalline lamellar structure melted at ˜97^oC into a disordered block copolymer melt. However, as the temperature jumped from room temperature to 100^oC, the crystalline lamellae entered directly into an ordered lamellar melt, which gradually transformed into a disordered melt isothermally held at 100^oC. The disordering process obeyed the Avrami equation, which might indicate a nucleation and growth mechanism. The anomalous isothermal disordering process was qualitatively explained by overheating of PE crystals using a G-T diagram. The PE-b-PEO sample exhibited double crystalline behaviors with the melting temperatures at 28.7^oC for the PEO crystals and 97.4^oC for the PE crystals. The crystallization of the PE blocks was unconfined, while the crystallization of the PEO blocks was confined in between the crystalline PE lamellae, as demonstrated by SAXS results. Both the PE and PEO blocks formed extended-chain crystals with the PE chains tilted ˜23^o. from the lamellar normal and the PEO chains parallel to the lamellar normal, as evidenced by wide angle X-ray diffraction patterns on shear-oriented samples. The crystallization kinetics for the PE and PEO blocks was further characterized by differential scanning calorimetry.

Zhu, Lei; Sun, Lu; Hsiao, Benjamin; Avila-Orta, Carlos

2004-03-01

407

[Congenital atrioventricular block].  

PubMed

Congenital atrioventricular block is defined (Yater) as a documented conduction defect in a young subject with unquestionable bradycardia in the absence of a history of infection which might have caused the condition after birth. It is a rare condition (1 out of 20,000 births) and may be isolated or associated with another congenital malformation. Four cardiac malformations are classically associated: endomyocardial fibrosis, morphological abnormalities close to the conduction system: corrected transposition, left isomerism; patent ductus arteriosus and atrial septal defect apparently unrelated but the most common; the association of mitral regurgitation in adults, although the significance is not very clear. Isolated block is often observed in patients with mothers suffering from autoimmune disease, often clinically latent. Anti Ro/SS-A and La/SS-B antibodies cross into the foetal circulation and cause inflammation of the conduction tissues but the causal mechanism is not known. The diagnosis of the conduction defect is sometimes made during foetal life by echocardiography. After birth, the diagnosis is made by electrocardiography but the block is not always complete or permanent, its degree often increasing with time. In addition, in advanced degrees of block, the escape rhythm tends to slow down. Long-term follow-up studies have revised the previously considered good prognosis of isolated congenital atrioventricular block but advances in cardiac pacing provide satisfactory treatment. In the foetus, isolated atrioventricular block is usually associated with an escape rhythm > 60/min and enables normal vaginal delivery; a low heart rate < 55/min and anasarca carry a poor prognosis. In the neonate, pacing is indicated in babies with cardiac failure and a heart rate < 55/min. Follow-up by Holter monitoring, exercise testing and echocardiography is justified in children and adolescents; the patients may become symptomatic at any age. Pacing is essential in symptomatic cases (malaise, ventricular dysfunction) and useful in cases with long QT intervals, frequent ventricular extrasystoles and wide ventriculogrammes. Pacing is not always easy in children. Epicardial pacing by thoracotomy or an epigastric approach is possible but endocavitary pacing is to be preferred using thin pacing catheters introduced via the subclavian vein and small pacemakers implanted in a sub or prepectoral site. A pacing mode which restores the normal atrioventricular sequence is theoretically superior to single ventricular pacing even if rate responsive frequency. PMID:10326158

Grolleau, R; Leclercq, F; Guillaumont, S; Voisin, M

1999-04-01

408

Neuromuscular blocking agents.  

PubMed

Clearly, many aspects of the action of neuromuscular blockers remain poorly understood at the molecular level. In the case of competitive blockers, blockade of EPPs by competitive binding to the ACh receptor site accounts for the most clinically important aspect of blockade. Although train-of-four fade produced by curare and some other competitive agents probably represents a presynaptic action, the molecular mechanisms underlying this effect have not been addressed. Depolarizing blockade is inherently more complicated than competitive blockade. Simple depolarization and inactivation of the mechanism for generation of the action potential probably account for the major clinical effect seen in phase I block. Furthermore, the relative balance between activation of channels and desensitization may also provide a qualitative explanation for phase II block and tachyphylaxis. However, effects that are more likely to be explained by presynaptic actions of depolarizing blockers have also been described, and it is not yet possible to assess quantitatively whether the rates of onset of the different postsynaptic actions can account for most aspects of depolarizing block. This discussion has raised several issues which need to be addressed in future studies. 1. What are the presynaptic effects of cholinergic drugs? Do these drugs act through a specific receptor or, on other ion channels in the terminal membrane, or do they operate by mechanisms distinct from effects on membrane conductance? Can any of the observations be explained by indirect effects mediated through postsynaptic ACh receptors, e.g., K+ release? 2. What are the factors that influence variability in sensitivity to neuromuscular blockers among species, muscles within species, and during development? Many of the potential factors, e.g., differences in safety factor, resting conductances, ACh receptor type, and differences in the presence and absence of presynaptic receptors, have been outlined, but definitive tests of the contribution of any particular mechanisms are lacking. 3. Does modulation of desensitization play a role in any components of neuromuscular blockade? 4. Can trapping of blocking agents in ion channels in some cases account for slowly reversible components of blockade? 5. Can closed-channel block provide an effective mechanism of neuromuscular block? PMID:2848776

Lingle, C J; Steinbach, J H

1988-01-01

409

Coherently Explaining UML Statechart and Collaboration Diagrams by Graph Transformations  

E-print Network

use case, class, object, and sequence diagrams as well. The statechart and collaboration diagrams describe the operations of the underlying class diagram and include OCL expressions as guards and parts in [Kuske et al., 2002] for class, object and statechart diagrams. Since this approach does not cover

Gogolla, Martin - Fachbereich 3

410

Diagrams Based on Structural Object Perception Pourang Irani  

E-print Network

(506) 453-4566 cware@omg.unb.ca ABSTRACT Most diagrams, particularly those used in software engineering attention on a common class of diagrams technically called graphs in computer science, and also sometimes called a node-link diagram. This category of diagrams includes software structure charts [14], entity

New Hampshire, University of

411

Coverage Criteria for Testing of Object Interactions in Sequence Diagrams  

E-print Network

engineering, both for class diagrams and for sequence diagrams. In addition, several static analyses proposed of collaborating objects. The cri- teria are based on UML sequence diagrams that are reverse-engineered from the previous work that proposes such approaches. With the help of reverse-engineering tools, sequence diagrams

Rountev, Atanas "Nasko"

412

Coverage Criteria for Testing of Object Interactions in Sequence Diagrams  

E-print Network

of collaborating objects. The cri- teria are based on UML sequence diagrams that are reverse-engineered from work that proposes such approaches. With the help of reverse-engineering tools, sequence diagrams can, both for class diagrams and for sequence diagrams. In addition, several static analyses proposed

Sawin, Jason

413

Javelin Diagrams: A Graphical Tool for Probabilistic Sensitivity Analysis  

E-print Network

of a probabilistic sensitivity analysis. Here we introduce an analog of tornado diagrams for probabilistic sensitivity analysis, which we call javelin diagrams. Javelin diagrams are graphical augmentations of tornado). For instance, Clemen (1996, Ch.5) illustrates how tornado diagrams (e.g., Howard 1988) can be used to determine

Hazen, Gordon

414

Evolution of HR Diagrams So as a cluster ages, the  

E-print Network

Evolution of HR Diagrams So as a cluster ages, the main sequence `burns down' in order. lifetime Diagram to Determine the Age of a Star Cluster #12;Evolution of HR Diagrams So as a cluster ages, the main of plotting stars, we represent them with a line of constant age. Using the H-R Diagram to Determine the Age

Barnes, Joshua Edward

415

Science Visual Literacy: Learners' Perceptions and Knowledge of Diagrams  

ERIC Educational Resources Information Center

Constructing meaning from science texts relies not only on comprehending the words but also the diagrams and other graphics. The goal of this study was to explore elementary students' perceptions of science diagrams and their skills related to diagram interpretation. 30 students, ranging from second grade through middle school, completed a diagram

McTigue, Erin M.; Flowers, Amanda C.

2011-01-01

416

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

2010-10-01

417

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

418

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

2014-10-01

419

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

2012-10-01

420

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

2011-10-01

421

49 CFR 1152.10 - System diagram map.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false System diagram map. 1152.10 Section 1152.10 Transportation...Diagram § 1152.10 System diagram map. (a) Each carrier shall prepare a diagram of its rail system on a map, designating all lines in its...

2013-10-01

422

Timed Data Flow Diagrams Jurgen Symanzik and Albert L. Baker  

E-print Network

Timed Data Flow Diagrams J¨urgen Symanzik and Albert L. Baker TR #96--23 December 1996 Keywords, Formalized Data Flow Diagrams, Timed Petri Nets. c fl Copyright 1996 by J¨urgen Symanzik and Albert L. Baker, Iowa 50011--1040, USA #12; 1 1 TIMED DATA FLOW DIAGRAMS Abstract Data Flow Diagrams (DFD's) are widely

Symanzik, Jürgen

423

Timed Data Flow Diagrams Jurgen Symanzik and Albert L. Baker  

E-print Network

Timed Data Flow Diagrams Jurgen Symanzik and Albert L. Baker TR 96 23 December 1996 Keywords, Formalized Data Flow Diagrams, Timed Petri Nets. c Copyright 1996 by Jurgen Symanzik and Albert L. Baker. All 1040, USA #12;1 1 TIMED DATA FLOW DIAGRAMS Abstract Data Flow Diagrams DFD's are widely used

Symanzik, Jürgen

424

Abstracting Business Level UML Diagrams from Web Applications  

Microsoft Academic Search

In this paper, a reverse engineering approach for reconstructing UML diagrams at business level of the application domain of a Web application is presented. In particular, the approach allows the reconstruction of the UML class diagram providing an object-oriented conceptual model of the application domain, sequence diagrams modeling the interactions among the identified business objects and use case diagrams modeling

Giuseppe Antonio Di Lucca; Anna Rita Fasolino; Porfirio Tramontana; Ugo De Carlini

2003-01-01

425

Deformation of the Gorda Block of the Juan de Fuca Plate  

E-print Network

, producing an overall right-la- teral shear zone (Figure 0; Knapp, 1982). GORDA N GORDA GORDA Figure 3: Schematic diagram of the rigid central block model. 43' Gorda Ris + 8(a g "oo gita' ~o( rtrr +~oe 41 Gs Mendocino Fracture Zone 127' 126...

Stoddard, Paul Richard

1982-01-01

426

Relative Building-Block Fitness and the Building-Block Hypothesis  

Microsoft Academic Search

The building-block hypothesis states that the GA works well when short,low-order, highly-fit schemas recombine to form even more highly fithigher-order schemas. The ability to produce fitter and fitter partial solutionsby combining building blocks is believed to be a primary source of theGA's search power, but the GA research community currently lacks preciseand quantitative descriptions of how schema processing actually takesplace

Stephanie Forrest

1993-01-01

427

31 CFR 576.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2014 CFR

...Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRAQ STABILIZATION AND INSURGENCY SANCTIONS REGULATIONS General Definitions § 576.301 Blocked account; blocked...

2014-07-01

428

31 CFR 576.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2011 CFR

...Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRAQ STABILIZATION AND INSURGENCY SANCTIONS REGULATIONS General Definitions § 576.301 Blocked account; blocked...

2011-07-01

429

31 CFR 576.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2013 CFR

...Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRAQ STABILIZATION AND INSURGENCY SANCTIONS REGULATIONS General Definitions § 576.301 Blocked account; blocked...

2013-07-01

430

31 CFR 576.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2012 CFR

...Treasury Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY IRAQ STABILIZATION AND INSURGENCY SANCTIONS REGULATIONS General Definitions § 576.301 Blocked account; blocked...

2012-07-01

431

31 CFR 510.301 - 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 NORTH KOREA SANCTIONS REGULATIONS General Definitions § 510.301 Blocked account; blocked property. The terms...

2012-07-01

432

31 CFR 510.301 - 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 NORTH KOREA SANCTIONS REGULATIONS General Definitions § 510.301 Blocked account; blocked property. The terms...

2013-07-01

433

31 CFR 510.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2014 CFR

...Regulations Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY NORTH KOREA SANCTIONS REGULATIONS General Definitions § 510.301 Blocked account; blocked property. The terms...

2014-07-01

434

31 CFR 510.301 - 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 NORTH KOREA SANCTIONS REGULATIONS General Definitions § 510.301 Blocked account; blocked property. The terms...

2011-07-01

435

31 CFR 586.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2010 CFR

...and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FEDERAL REPUBLIC OF YUGOSLAVIA (SERBIA & MONTENEGRO) KOSOVO SANCTIONS REGULATIONS General Definitions § 586.301 Blocked account; blocked property....

2010-07-01

436

31 CFR 587.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2010 CFR

...and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY FEDERAL REPUBLIC OF YUGOSLAVIA (SERBIA AND MONTENEGRO) MILOSEVIC SANCTIONS REGULATIONS General Definitions § 587.301 Blocked account; blocked...

2010-07-01

437

31 CFR 544.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2014 CFR

...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS General Definitions § 544.301 Blocked account; blocked...

2014-07-01

438

31 CFR 544.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2013 CFR

...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS General Definitions § 544.301 Blocked account; blocked...

2013-07-01

439

31 CFR 544.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2010 CFR

...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS General Definitions § 544.301 Blocked account; blocked...

2010-07-01

440

31 CFR 544.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2011 CFR

...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS General Definitions § 544.301 Blocked account; blocked...

2011-07-01

441

31 CFR 544.301 - Blocked account; blocked property.  

Code of Federal Regulations, 2012 CFR

...Relating to Money and Finance (Continued) OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY WEAPONS OF MASS DESTRUCTION PROLIFERATORS SANCTIONS REGULATIONS General Definitions § 544.301 Blocked account; blocked...

2012-07-01

442

Flow Effects on the Flammability Diagrams of Solid Fuels  

NASA Technical Reports Server (NTRS)

A research program is currently underway with the final objective of developing a fundamental understanding of the controlling mechanisms underlying the flammability diagrams of solid combustible materials and their derived fire properties. Given that there is a high possibility of an accidental fire occurring in a space-based facility, understanding the fire properties of materials that will be used in such facilities is of critical importance. With this purpose, the flammability diagrams of the materials, as those produced by the Lateral Ignition and Flame Spread Test (LIFT) apparatus and by a new forced flow device, the Forced Flow Ignition and Flame Spread Test (FIST) apparatus, will be obtained. The specific objective of the program is to apply the new flammability apparatus, which will more accurately reflect the potential ambient conditions of space-based environments, to the characterization of the materials for space applications. This paper presents a parametric study of oxidizer flow effects on the ignition curve of the flammability diagrams of PMMA. The dependence of the ignition delay time on the external radiant flux and either the sample width (LIFT) or the flow velocity (FIST) has been studied. Although preliminary, the results indicate that natural and forced convection flow changes, affect the characteristics of the ignition curves of the flammability diagrams. The major effect on the ignition time appears to be due to convective transfer variations at the fuel surface. At high radiant fluxes or high flow velocities, however, it appears that gas phase processes become increasingly important, affecting the overall ignition delay time. A numerical analysis of the solid fuel heating and pyrolysis has also been developed. The theoretical predictions approximate the experiments well for conditions in which the gas phase induction time is negligible.

Cordova, J. L.; Ceamanos, J.; Fernandez-Pello, A. C.; Long, R. T.; Torero, J. L.; Quintiere, J. G.

1997-01-01

443

On phase diagrams of magnetic reconnection  

SciTech Connect

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. [Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States)] [Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States); Drake, J. F. [IREAP, University of Maryland, College Park, Maryland 20742-3511 (United States)] [IREAP, University of Maryland, College Park, Maryland 20742-3511 (United States)

2013-06-15

444

Measurement of Eye Diagrams and Constellation Diagrams of Optical Sources Using Linear Optics and Waveguide Technology  

Microsoft Academic Search

We demonstrate the characterization of optical sources with high sensitivity, high temporal resolution, and phase sensitivity using linear optical sampling. Eye diagrams and constellation diagrams are reconstructed using the interference of the source under test with a train of sampling pulses. This concept is implemented using a waveguide optical hybrid, which splits and recombines the sources and adjusts the phase

C. Dorrer; Christopher Richard Doerr; I. Kang; Roland Ryf; J. Leuthold; P. J. Winzer

2005-01-01

445

Evaluating data flow diagrams and class diagrams in usability laboratory experiments (CADPRO Pilot #2)  

Microsoft Academic Search

This paper reports on a second pilot experiment for the CADPRO project taking into account a number of the recommendations arising from the first pilot. Three subjects produced data flow diagrams and class diagrams in a usability laboratory setting. Characteristics of subjects' solutions are discussed and the usefulness of profiles of product delivery and constraint activations against time is determined.

SHINGO TAKADA; LOUISE SCOTT; ANDY BROOKS

446

Thermal blocking of preheating  

NASA Astrophysics Data System (ADS)

The parametric resonance responsible for preheating after inflation will end when self-interactions of the resonating field and interactions of this field with secondary degrees of freedom become important. In many cases, the effect may be quantified in terms of an effective mass and the resulting shifting out of the spectrum of the strongest resonance band. In certain curvaton models, such thermal blocking can even occur before preheating has begun, delaying or even preventing the decay of the curvaton. We investigate numerically to what extent this thermal blocking is realised in a specific scenario, and whether the effective mass is well approximated by the perturbative leading order thermal mass. We find that the qualitative behaviour is well reproduced in this approximation, and that the end of preheating can be confidently estimated.

Lerner, Rose; Tranberg, Anders

2015-04-01

447

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

448

Base Blocks Decimal  

NSDL National Science Digital Library

This Java applet allows students to practice adding and subtracting whole numbers, decimals, or integers. Students use base blocks in blue to represent positive numbers, and red to represent either negative numbers or subtraction. The applet offers up to three decimal places, 2 to 4 columns, and bases from 2 through 5 and 10. Applet instructions and teaching ideas are available through the links at the top of the page.

2002-01-01

449

Herbert L. Block Collection  

NSDL National Science Digital Library

Herb Block (also known as "Herblock") was one of the most influential political commentators and editorial cartoonists in American history. His work began to appear in 1929, and he continued creating social commentary for 72 years. The Library of Congress website digitized some of the 14,000 images that the Herb Block Foundation donated in 2002. Visitors interested in seeing the wide range of topics Block covered in his cartoons can click on the "Search This Collection" link that appears below the introductory paragraphs on the homepage. Once visitors have arrived to the search area they can click on "Subject and Format Headings" underneath the heading "Other Ways to Search" to see the A to Z subject index. Some of the topics include "Escalators--1960-1970","Government Officials--1970-1980","Mao, Zedong--1893-1976", "Overcrowding--1940-1950", and "Discrimination--1950-1960". Back on the homepage, visitors shouldn't miss the link to the "Image Sampler" which contains the "Herblock Collection Image Sampler" featuring 24 images.

450

Intraocular radiation blocking  

SciTech Connect

Iodine-based liquid radiographic contrast agents were placed in normal and tumor-bearing (Greene strain) rabbit eyes to evaluate their ability to block iodine-125 radiation. This experiment required the procedures of tumor implantation, vitrectomy, air-fluid exchange, and 125I plaque and thermoluminescent dosimetry (TLD) chip implantation. The authors quantified the amount of radiation attenuation provided by intraocularly placed contrast agents with in vivo dosimetry. After intraocular insertion of a blocking agent or sham blocker (saline) insertion, episcleral 125I plaques were placed across the eye from episcleral TLD dosimeters. This showed that radiation attenuation occurred after blocker insertion compared with the saline controls. Then computed tomographic imaging techniques were used to describe the relatively rapid transit time of the aqueous-based iohexol compared with the slow transit time of the oil-like iophendylate. Lastly, seven nontumor-bearing eyes were primarily examined for blocking agent-related ocular toxicity. Although it was noted that iophendylate induced intraocular inflammation and retinal degeneration, all iohexol-treated eyes were similar to the control eyes at 7 and 31 days of follow-up. Although our study suggests that intraocular radiopaque materials can be used to shield normal ocular structures during 125I plaque irradiation, a mechanism to keep these materials from exiting the eye must be devised before clinical application.

Finger, P.T.; Ho, T.K.; Fastenberg, D.M.; Hyman, R.A.; Stroh, E.M.; Packer, S.; Perry, H.D. (North Shore Univ. Hospital, Manhasset, NY (USA))

1990-09-01

451

Blocking and anti-blocking pairs of polyhedra  

Microsoft Academic Search

Some of the main notions and theorems about blocking pairs of polyhedra and antiblocking pairs of polyhedra are described. The two geometric duality theories conform in many respects, but there are certain important differences. Applications to various combinatorial extremum problems are discussed, and some classes of blocking and anti-blocking pairs that have been explicitly determined are mentioned.

D. R. Fulkerson

1971-01-01

452

FUNCTIONAL BLOCK DIAGRAM CS SC OE EOCEN SYNC 12/8 EOC  

E-print Network

VDD DGND OUTPUT REGISTER 4-BIT FLASH A/D CONVERTER CONTROL LOGIC CONVERSION LOGIC SAMPLE/ HOLD GAIN Complement Data Format (Bipolar Mode) Straight Binary Data Format (Unipolar Mode) 10 M Input Impedance 8-Bit, Industrial and Military Temperature Range Grades MIL-STD-883 Compliant Versions Available PRODUCT DESCRIPTION

Berns, Hans-Gerd

453

FORMAL SEMANTICS AND VERIFICATION OF DYNAMIC RELIABILITY BLOCK DIAGRAMS FOR SYSTEM RELIABILITY MODELING  

E-print Network

mode). Among the existing reliability modeling tools, only the dynamic fault tree (DFT) has Dartmouth, MA 02747, USA hxu@umassd.edu Liudong Xing Electrical and Computer Engineering Department, military, and power industries exhibit more complex dependent and dynamic behaviors, which cannot be fully

Xu, Haiping

454

APGAN and RPMC: Complementary Heuristics for Translating DSP Block Diagrams into Efficient Software Implementations  

E-print Network

America, Ltd., 201 East Tasman Drive, San Jose, California 95134, USA. P. K. Murthy and E. A. Lee are with the Dept. of Electrical Engineering and Computer Sciences, University of California at Berkeley, California- nique, called pairwise grouping of adjacent nodes (PGAN), that was proposed earlier for general SDF

455

APGAN and RPMC: Complementary Heuristics for Translating DSP Block Diagrams into Efficient Software Implementations  

E-print Network

East Tasman Drive, San Jose, California 95134, USA. P. K. Murthy and E. A. Lee are with the Dept. of Electrical Engineering and Computer Sciences, University of California at Berkeley, California 94720, USA pairwise grouping of adjacent nodes (PGAN), that was proposed earlier for general SDF graphs. We show

Bhattacharyya, Shuvra S.

456

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

E-print Network

) for a nuclear power plant in South Korea. Our approach to fault tree analysis, which combines fault-shi, Kyongki-do, Republic of Korea b Department of Electrical Engineering and Computer Science, Korea Advanced­on, 305-701, Republic of Korea c Korea Atomic Energy Research Institute (KAERI), I&C and HF team, 150

457

HGB 8/30/1996 for SuperK OD DAQ Version 2 , BLOCK DIAGRAM  

E-print Network

POWER EVENT NUMBER BITS) (T0 + "CHOPPED" to TDC DATA INPUTS (EVENT NUMBER) INPUT PORT 1 to STRUCK LATCH RS485 ­> ECL RS485 [Default=closed] ECL FTRG = TDC COMMON STOP (via "BIP" cable) (TDC COM STOP) FASTBUS TR6 (via "BIP" cable) BIP signal to FSCC TSTRB input NIM TRAILING EDGE D. 200nsec PULSER (TDC BIP

Berns, Hans-Gerd

458

FROM REQUIREMENTS TO FUNCTION BLOCK DIAGRAMS: A NEW APPROACH FOR THE DESIGN OF INDUSTRIAL CONTROL APPLICATIONS  

Microsoft Academic Search

The always growing need, for innovative products, forces manufacturing plants to improve their ability to quickly respond to market requirements by designing competitive products and modifying existing ones. However most of the traditional methods, products and tools are far away from the new challenging technologies of Software Engineering. Today's systems are composed of monolithic applications that are almost impossible to

C. Tranoris; K. Thramboulidis

2002-01-01

459

The Butterfly diagram leopard skin pattern  

NASA Astrophysics Data System (ADS)

A time-latitude diagram where spotgroups are given proportional relevance to their area is presented. The diagram reveals that the spotted area distribution is higly dishomogeneous, most of it being concentrated in few, small portions (``knots'') of the Butterfly Diagram; because of this structure, the BD may be properly described as a cluster of knots. The description, assuming that spots scatter around the ``spot mean latitude'' steadily drifting equatorward, is challenged. Indeed, spots cluster around at as many latitudes as knots; a knot may appear at either lower or higher latitudes than previous ones, in a seemingly random way; accordingly, the spot mean latitude abruptly drifts equatorward or even poleward at any knot activation, in spite of any smoothing procedure. Preliminary analyses suggest that the activity splits, in any hemisphere, into two or more distinct ``activity waves'', drifting equatorward at a rate higher than the spot zone as a whole.

Ternullo, Maurizio

2011-08-01

460

"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

461

Microcomputer processing for Loran-C  

NASA Technical Reports Server (NTRS)

Schematic diagrams are presented for the microcomputer processing for Loran-C. Diagrams are included for the following: microcomputer Loran-C loop improvements; Loran-C receiver commutated AGC; and DC-DC power supply.

Lilley, R. W.; Mccall, D. L.; Novacki, S. M., III

1981-01-01

462

Ear - blocked at high altitudes  

MedlinePLUS

High altitudes and blocked ears; Flying and blocked ears; Eustachian tube dysfunction -high altitude ... opens the Eustachian tube, which connects the middle ear to the nose. These movements allow the pressure ...

463

1-loop color structures and sunny diagrams  

NASA Astrophysics Data System (ADS)

The space of tree level color structures for gluon scattering was determined recently along with its transformation properties under permutations. Here we generalize the discussion to loops, demonstrating a reduction of an arbitrary color diagram to its vacuum skeleton plus rays. For 1-loop there are no residual relations and we determine the space of color structures both diagrammatically and algebraically in terms of certain sunny diagrams. We present the generating function for the characteristic polynomials and a list of irreducible representations for 3 ? n ? 9 external legs. Finally we present a new proof for the 1-loop shuffle relations based on the cyclic shuffle and split operations.

Kol, Barak; Shir, Ruth

2015-02-01

464

Fusion Diagrams in the - and - Systems  

NASA Astrophysics Data System (ADS)

A calculation model of the Gibbs energy of ternary oxide compounds from the binary components was used. Thermodynamic properties of -- ternary systems in the condensed state were calculated. Thermodynamic data of binary and ternary compounds were used to determine the stable sections. The probability of reactions between the corresponding components in the -- system was estimated. Fusibility diagrams of systems - and - were studied by physical-chemical analysis. The isothermal section of the phase diagram of -- at 298 K is built, as well as the projection of the liquid surface of --.

Asadov, M. M.; Akhmedova, N. A.

2014-10-01

465

Properties of blocked linear systems?  

PubMed Central

This paper presents a systematic study on the properties of blocked linear systems that have resulted from blocking discrete-time linear time invariant systems. The main idea is to explore the relationship between the blocked and the unblocked systems. Existing results are reviewed and a number of important new results are derived. Focus is given particularly on the zero properties of the blocked system as no such study has been found in the literature. PMID:23471460

Chen, Weitian; Anderson, Brian D.O.; Deistler, Manfred; Filler, Alexander

2012-01-01

466

Epidural blocks for day surgery  

Microsoft Academic Search

Lumbar epidural blocks may be indicated for selected cases in day surgery; either by special request from the patient, prolonged or unpredictable duration of surgery, or caudal blocks for prolonged postoperative pain control in children. The drawbacks of epidural anesthesia, such as preoperative time consumption, may be minimized by introducing the epidural block by slow injection through the needle in

Johan Ræder

2000-01-01

467

California Energy Commission BLOCK GRANT  

E-print Network

California Energy Commission REVISED BLOCK GRANT GUIDELINES (FORMULA-BASED GRANTS) ENERGY EFFICIENCY CONSERVATION BLOCK GRANT PROGRAM FOR CONSIDERATION FOR ADOPTION BY THE CALIF. ENERGY COMMISSION and Conservation Block Grant (EECBG) Program Guidelines 1. Background The California Energy Commission1 (Energy

468

On Blocking Numbers of Surfaces  

Microsoft Academic Search

The blocking number of a manifold is the minimal number of points needed to block out lights between any two given points in the manifold. It has been conjectured that if the blocking number of a manifold is finite, then the manifold must be flat. In this paper we prove that this is true for 2-dimensional manifolds with non-trivial fundamental

Wing Kai Ho

2008-01-01

469

Three-body crystallization diagrams and the cooling of white dwarfs  

E-print Network

The 3-body crystallization diagrams of C/O/Ne ionic mixtures characteristic of white dwarf interiors are examined within the framework of the density-functional theory of freezing. The crystallization process is described more accurately than in former calculations where the three-component system was treated as an effective two-component mixture (Segretain et al. 1994). The distillation process due to neon-crystallization is found to occur only for the late stages of crystallization. At the beginning, the presence of neon plays only a minor role and the phase diagram resembles a pure carbon-oxygen diagram. The final phase diagram is found to exhibit an azeotropic point with a neon concentration $x_{Ne}=0.22$, a carbon concentration $x_{C}=0.78$ and an oxygen concentration $x_O=0$, so that during the distillation process, the fluid crystallizes into a pure neon-carbon solid. The critical temperature is $T_A=0.85\\,T_C$, where $T_C$ is the pure carbon crystallization temperature. We use this accurate phase diagram to calculate the total gravitational energy released during white dwarf crystallization and the related time delay. The final result yields $\\Delta \\tau \\approx 2.6$ Gyr, among which about 20\\% are due to the neon-distillation process.

Laurent Segretain

1995-10-23

470

A reverse engineering methodology to reconstruct hierarchical data flow diagrams for software maintenance  

Microsoft Academic Search

The methodology used to define a reverse engineering process that has been employed in an enhancement maintenance operation on a Pascal software system is described. Attention is focused on the methodology used to produce, from code, a hierarchy of data-flow diagrams (DFDs) at different levels of abstraction. DFDs are produced in the high-level design phase of a software production process

P. Benedusi; A. Cimitile; U. De Carlini

1989-01-01

471

Enhancing Learning Effectiveness through Connectance Diagrams: A New Tool for Learning Organisations  

ERIC Educational Resources Information Center

Purpose: The purpose of this paper is to provide an overview of a particular approach for increasing knowledge creation in organisation. The paper provides a discussion of related concepts, processes, and a tool. Design/methodology/approach: This paper describes the reasons for drawing connectance diagrams, the process and the software. It also…

Lim, Sirirat Sae; Tan, Kim Hua; Platts, Ken

2005-01-01

472

Study flow diagrams in Cochrane systematic review updates: an adapted PRISMA flow diagram.  

PubMed

Cochrane systematic reviews are conducted and reported according to rigorous standards. A study flow diagram must be included in a new review, and there is clear guidance from the PRISMA statement on how to do this. However, for a review update, there is currently no guidance on how study flow diagrams should be presented. To address this, a working group was formed to find a solution and produce guidance on how to use these diagrams in review updates.A number of different options were devised for how these flow diagrams could be used in review updates, and also in cases where multiple searches for a review or review update have been conducted. These options were circulated to the Cochrane information specialist community for consultation and feedback. Following the consultation period, the working group refined the guidance and made the recommendation that for review updates an adapted PRISMA flow diagram should be used, which includes an additional box with the number of previously included studies feeding into the total. Where multiple searches have been conducted, the results should be added together and treated as one set of results.There is no existing guidance for using study flow diagrams in review updates. Our adapted diagram is a simple and pragmatic solution for showing the flow of studies in review updates. PMID:24886533

Stovold, Elizabeth; Beecher, Deirdre; Foxlee, Ruth; Noel-Storr, Anna

2014-01-01

473

Building With Blocks  

NSDL National Science Digital Library

This interactive site allows students to build with virtual blocks to discover geometry, three-dimensional space, and area. There are a number of different problems here, including Copy the Building, Building in the Night, Making Height Numbers, and Rotation Game. There are also Additional Problems for students to solve, such as repairing a broken table, putting arm rests on a chair, and making a tunnel through a mountain. Each asks students to reason with different, often non-standard, shapes and think about 3D form.

Jan van den Brink

2004-01-01

474

Multi-level bandwidth efficient block modulation codes  

NASA Technical Reports Server (NTRS)

The multilevel technique is investigated for combining block coding and modulation. There are four parts. In the first part, a formulation is presented for signal sets on which modulation codes are to be constructed. Distance measures on a signal set are defined and their properties are developed. In the second part, a general formulation is presented for multilevel modulation codes in terms of component codes with appropriate Euclidean distances. The distance properties, Euclidean weight distribution and linear structure of multilevel modulation codes are investigated. In the third part, several specific methods for constructing multilevel block modulation codes with interdependency among component codes are proposed. Given a multilevel block modulation code C with no interdependency among the binary component codes, the proposed methods give a multilevel block modulation code C which has the same rate as C, a minimum squared Euclidean distance not less than that of code C, a trellis diagram with the same number of states as that of C and a smaller number of nearest neighbor codewords than that of C. In the last part, error performance of block modulation codes is analyzed for an AWGN channel based on soft-decision maximum likelihood decoding. Error probabilities of some specific codes are evaluated based on their Euclidean weight distributions and simulation results.

Lin, Shu

1989-01-01

475

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

476

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

477

Testability Analysis of a UML Class Diagram  

Microsoft Academic Search

Design-for-testability is a very important issue in software engineering. It becomes crucial in the case of OO designs where control flows are generally not hierarchical, but are diffuse and distributed over the whole architecture. In this paper, we concentrate on detecting, pinpointing and suppressing potential testability weaknesses of a UML class diagram. The attribute significant from design testability is called

Benoit Baudry; Yves Le Traon; Gerson Sunyé

2002-01-01

478

Students' different understandings of class diagrams  

Microsoft Academic Search

The software industry needs well-trained software designers and one important aspect of software design is the ability to model software designs visually and understand what visual models represent. However, previous research indicates that software design is a difficult task to many students. This article reports empirical findings from a phenomenographic investigation on how students understand class diagrams, Unified Modeling Language

Jonas Boustedt

2012-01-01

479

Automatically Extracting Class Diagrams from Spreadsheets  

Microsoft Academic Search

The use of spreadsheets to capture information is widespread in in- dustry. Spreadsheets can thus be a wealthy source of domain information. We propose to automatically extract this information and transform it into class di- agrams. The resulting class diagram can be used by software engineers to un- derstand, refine, or re-implement the spreadsheet's functionality. To enable the transformation into

Felienne Hermans; Martin Pinzger; Arie van Deursen

2010-01-01

480

Nice class diagrams admit good design?  

Microsoft Academic Search

Analysis and design of programs by using tools has emerged to a standard technique in object-oriented software engineering. Many of these tools claim to implement methods according to the UML standard and some of the tools provide automatic layout of the diagrams drawn by the user or generated automatically from source code. In this paper we propose a set of

Holger Eichelberger; Am Hubland

2003-01-01

481

Empirical Validation of Class Diagram Complexity Metrics  

Microsoft Academic Search

One of the principal objectives of software engineering is to improve the quality of software products. It is widely recognised that the quality assurance of software products must be guaranteed from the early phases of development. As a key artifact produced in the early development of object-oriented (OO) information systems (OOISs), class diagram quality has a great impact on the

Marcela Genero; Mario Piattini; Luis Jiménez

2001-01-01

482

Drawing conformal diagrams for a fractal landscape  

SciTech Connect

Generic models of cosmological inflation and the recently proposed scenarios of a recycling universe and the string theory landscape predict spacetimes whose global geometry is a stochastic, self-similar fractal. To visualize the complicated causal structure of such a universe, one usually draws a conformal (Carter-Penrose) diagram. I develop a new method for drawing conformal diagrams, applicable to arbitrary 1+1-dimensional spacetimes. This method is based on a qualitative analysis of intersecting lightrays and thus avoids the need for explicit transformations of the spacetime metric. To demonstrate the power and simplicity of this method, I present derivations of diagrams for spacetimes of varying complication. I then apply the lightray method to three different models of an eternally inflating universe (scalar-field inflation, recycling universe, and string theory landscape) involving the nucleation of nested asymptotically flat, de Sitter and/or anti-de Sitter bubbles. I show that the resulting diagrams contain a characteristic fractal arrangement of lines.

Winitzki, Sergei [Department of Physics, Ludwig-Maximilians University, Theresienstr. 37, 80333 Munich (Germany)

2005-06-15

483

Phase Diagram of a Charged Bose Gas  

Microsoft Academic Search

The phase diagram of a charged Bose gas is drawn. We discuss the domains of existence of the solid, fluid, and superfluid phases. It is predicted that superdense helium can be superfluid at densities higher than 106 g\\/cm3.

J. P. Hansen; B. Jancovici; Daniel Schiff

1972-01-01

484

Fat Voronoi Diagrams Gary L. Miller  

E-print Network

quadtree form a good aspect ratio Voronoi diagram. Figure 1: Right: A fat Voronoi cell can have arbitrarily aspect ratio. The cell on the right is fat but it does not have good aspect ratio. The dual complex. A Voronoi cell, Vor(v), is -fat if Rv rv . The classic definition of a good aspect ratio Voronoi cell

Miller, Gary L.

485

New developments in understanding the HR diagram  

Microsoft Academic Search

Results of recent research efforts aimed at the interpretation and reproduction of the Hertzsprung-Russell diagram are reviewed. In particular, attention is given to basic stellar evolution; nuclear reactions, opacities, and stellar winds; semiconduction and convective overshoot; and old star clusters. The discussion also covers intermediate age clusters and Cepheid stars and supergiant stars in the Milky Way and LMC.

Cesare Chiosi; Gianpaolo Bertelli; Alessandro Bressan

1992-01-01

486

The granulation boundary in the HR diagram  

Microsoft Academic Search

A granulation boundary in the H-R diagram is found. The boundary runs smoothly from spectral type G1 Ib to near F0 on the main sequence. On the cool side of the boundary, the spectral line bisectors are of the classical type associated with granulation. On the hot side the bisectors show a reversed slope and curvature indicative of some other

David F. Gray; Thomas Nagel

1989-01-01

487

Synthetic HR-diagrams for massive stars  

Microsoft Academic Search

Observations of luminous stars are compared to synthetic HR diagrams generated from three sets of evolutionary models with different treatment of mass loss, convective overshoot, and considering or not variations in the opacity due to heavy elements. We take into account also different values for the slope of the initial mass function, and the possibility that a fraction of the

E. Nasi; C. Forieri

1990-01-01

488

Complexities of One-Component Phase Diagrams  

ERIC Educational Resources Information Center

For most materials, the solid at and near the triple-point temperature is denser than the liquid with which it is in equilibrium. However, for water and certain other materials, the densities of the phases are reversed, with the solid being less dense. The profound consequences for the appearance of the "pVT" diagram of one-component materials…

Ciccioli, Andrea; Glasser, Leslie

2011-01-01

489

Phase diagram of spiking neural networks.  

PubMed

In computer simulations of spiking neural networks, often it is assumed that every two neurons of the network are connected by a probability of 2%, 20% of neurons are inhibitory and 80% are excitatory. These common values are based on experiments, observations, and trials and errors, but here, I take a different perspective, inspired by evolution, I systematically simulate many networks, each with a different set of parameters, and then I try to figure out what makes the common values desirable. I stimulate networks with pulses and then measure their: dynamic range, dominant frequency of population activities, total duration of activities, maximum rate of population and the occurrence time of maximum rate. The results are organized in phase diagram. This phase diagram gives an insight into the space of parameters - excitatory to inhibitory ratio, sparseness of connections and synaptic weights. This phase diagram can be used to decide the parameters of a model. The phase diagrams show that networks which are configured according to the common values, have a good dynamic range in response to an impulse and their dynamic range is robust in respect to synaptic weights, and for some synaptic weights they oscillates in ? or ? frequencies, independent of external stimuli. PMID:25788885

Seyed-Allaei, Hamed

2015-01-01

490

Phase diagram of spiking neural networks  

PubMed Central

In computer simulations of spiking neural networks, often it is assumed that every two neurons of the network are connected by a probability of 2%, 20% of neurons are inhibitory and 80% are excitatory. These common values are based on experiments, observations, and trials and errors, but here, I take a different perspective, inspired by evolution, I systematically simulate many networks, each with a different set of parameters, and then I try to figure out what makes the common values desirable. I stimulate networks with pulses and then measure their: dynamic range, dominant frequency of population activities, total duration of activities, maximum rate of population and the occurrence time of maximum rate. The results are organized in phase diagram. This phase diagram gives an insight into the space of parameters – excitatory to inhibitory ratio, sparseness of connections and synaptic weights. This phase diagram can be used to decide the parameters of a model. The phase diagrams show that networks which are configured according to the common values, have a good dynamic range in response to an impulse and their dynamic range is robust in respect to synaptic weights, and for some synaptic weights they oscillates in ? or ? frequencies, independent of external stimuli. PMID:25788885

Seyed-allaei, Hamed

2015-01-01

491

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

492

Orphan-Free Anisotropic Voronoi Diagrams  

E-print Network

We describe conditions under which an appropriately-defined anisotropic Voronoi diagram of a set of sites in Euclidean space is guaranteed to be composed of connected cells in any number of dimensions. These conditions are natural for problems in optimization and approximation, and algorithms already exist to produce sets of sites that satisfy them.

Canas, Guillermo D

2011-01-01

493

Composition inference for UML class diagrams  

Microsoft Academic Search

ABSTRACT Knowing which associations are compositions is important in a tool for the reverse engineering of UML class diagrams. Firstly, recovery of composition relationships bridges the gap between design and code. Secondly, since composition relationships explicitly state a requirement that certain representations cannot be exposed, it is important to determine if this requirement is met by component,code. Verifying that compositions

Ana Milanova

2007-01-01

494

Embedding Wellformed Euler Diagrams Peter Rodgers1  

E-print Network

"Northern Ireland". The zone that is in the contour "Ireland" but not in the contour "United Kingdom (non-empty) regions are called zones. For example, Figure 1 has a contour with label "Ireland" contains the item "Republic of Ireland". The demonstrable popularity of Euler diagrams lies in their wide

Kent, University of

495

Linear-size approximate voronoi diagrams  

Microsoft Academic Search

Given a set S of n points in IRd, a (t, ?)-approximate Voronoi diagram (AVD) is a partition of space into constant complexity cells, where each cell c is associated with t representative points of S, such that for any point in c, one of the associated representatives approximates the nearest neighbor to within a factor of (1 + ?).

Sunil Arya; Theocharis Malamatos

2002-01-01

496

The Binary Temperature-Composition Phase Diagram  

ERIC Educational Resources Information Center

The equations for the liquid and gas lines in the binary temperature-composition phase diagram are derived by approximating that delta(H)[subscript vap] of the two liquids are equal. It is shown that within this approximation, the resulting equations are not too difficult to present in an undergraduate physical chemistry lecture.

Sanders, Philip C.; Reeves, James H.; Messina, Michael

2006-01-01

497

Ring-Diagram Analysis: Status and Perspectives  

Microsoft Academic Search

Ring diagram analysis is now more than a decade old. While the details of the technique are still evolving, the application of the method to MDI, TON, Mt. Wilson, HLH, and GONG data is providing intriguing results. Thanks to the work of many people, it is now becoming possible to observationally infer the complicated dynamics in the outer 15 Mm

F. Hill

1999-01-01

498

Subsurface flows from ring diagram analysis  

Microsoft Academic Search

Since it was introduced, almost 20 years ago, ring-diagram analysis, a local helioseismology technique, has provided a variety of results, from large-scale motions on the Sun, such as differential rotation and meridional circulation, to the more localized studies of flows associated to active regions and filaments. This paper presents some relevant results obtained by several authors using this method that

Irene González Hernández

2008-01-01

499

Multimedia presentation design using data flow diagrams  

Microsoft Academic Search

Structured analysis\\/design methodology has been used in software development for many years. We propose a revised data flow diagram technique and system based on the structured analysis methodology. The system allows a multimedia presentation designer to stepwise refine his\\/her presentation toward an interactive Petri net, which defines the temporal behaviour of the presentation. The generated presentation can mutate itself at

Timothy K. Shih; C. H. Kuo; H. C. Keh; Y. H. Wang; C. S. Wang; S. K. C. Lo; Shuo-Chih Hsu

1997-01-01

500

On the Reliability of Ring Diagram Analysis  

Microsoft Academic Search

A comparison between the results of applying a ring diagram analysis to two data sets is described in order to check the quality of the two sets and the reliability of the method. The series used have been obtained with two different helioseismological instruments with the same spatial resolution. A section of 30 × 30 deg2 about the disk center

I. Gonzalez Hernandez; J. Patron; Dean-Yi Chou

1998-01-01