The Use of Visual Advance Organizers for Learning Earth Science Concepts.

ERIC Educational Resources Information Center

Weisberg, Joseph S.

This study was designed to determine whether advance organizers in the form of visual aids might serve the same function as Ausubel's verbal advance organizers. The basic design of the study consisted of a 4 X 3 X 2 ANOVA factorial design. Ninety-six eighth-grade students were involved in the study. One group was exposed to a physiographic diagram…

Consistency between Constructivist Profiles and Instructional Practices of Prospective Physics Teachers

ERIC Educational Resources Information Center

Ates, Ozlem; Unal Coban, Gul; Kaya Sengoren, Serap

2018-01-01

This study aims to explain the extent to which prospective physics teachers' views and practices are consistent with the constructivist framework. A case study design was employed as the research approach. The study was conducted with 11 prospective physics teachers attending a state university in Turkey. Data was collected through semi-structured…

Quantitative Imaging Biomarkers: A Review of Statistical Methods for Technical Performance Assessment

PubMed Central

2017-01-01

Technological developments and greater rigor in the quantitative measurement of biological features in medical images have given rise to an increased interest in using quantitative imaging biomarkers (QIBs) to measure changes in these features. Critical to the performance of a QIB in preclinical or clinical settings are three primary metrology areas of interest: measurement linearity and bias, repeatability, and the ability to consistently reproduce equivalent results when conditions change, as would be expected in any clinical trial. Unfortunately, performance studies to date differ greatly in designs, analysis method and metrics used to assess a QIB for clinical use. It is therefore, difficult or not possible to integrate results from different studies or to use reported results to design studies. The Radiological Society of North America (RSNA) and the Quantitative Imaging Biomarker Alliance (QIBA) with technical, radiological and statistical experts developed a set of technical performance analysis methods, metrics and study designs that provide terminology, metrics and methods consistent with widely accepted metrological standards. This document provides a consistent framework for the conduct and evaluation of QIB performance studies so that results from multiple studies can be compared, contrasted or combined. PMID:24919831

Critical and Reflective Thinking in an Intermediate Financial Accounting Course: An Action Research Study

ERIC Educational Resources Information Center

Cobb, Janice Lynn

2017-01-01

Accounting professionals have consistently called for educators to develop curriculum designed to encourage students to develop intellectual skills. The purpose of this action research study was to develop and implement an instructional method that requires intermediate financial accounting (IFA) students to consistently practice higher order…

Investigating the Use of Design Methods by Capstone Design Students at Clemson University

ERIC Educational Resources Information Center

Miller, W. Stuart; Summers, Joshua D.

2013-01-01

The authors describe a preliminary study to understand the attitude of engineering students regarding the use of design methods in projects to identify the factors either affecting or influencing the use of these methods by novice engineers. A senior undergraduate capstone design course at Clemson University, consisting of approximately fifty…

Operations analysis (study 2.1). Payload designs for space servicing, addendum

NASA Technical Reports Server (NTRS)

Wolfe, R. R.

1974-01-01

Space replaceable units and payload configurations are revised to reflect increased levels of redundancy to be more consistent with current design practices. A reassessment of expendable payload design reliabilities was performed to provide a common basis for comparison with space serviceable configurations.

Statistical methods for efficient design of community surveys of response to noise: Random coefficients regression models

NASA Technical Reports Server (NTRS)

Tomberlin, T. J.

1985-01-01

Research studies of residents' responses to noise consist of interviews with samples of individuals who are drawn from a number of different compact study areas. The statistical techniques developed provide a basis for those sample design decisions. These techniques are suitable for a wide range of sample survey applications. A sample may consist of a random sample of residents selected from a sample of compact study areas, or in a more complex design, of a sample of residents selected from a sample of larger areas (e.g., cities). The techniques may be applied to estimates of the effects on annoyance of noise level, numbers of noise events, the time-of-day of the events, ambient noise levels, or other factors. Methods are provided for determining, in advance, how accurately these effects can be estimated for different sample sizes and study designs. Using a simple cost function, they also provide for optimum allocation of the sample across the stages of the design for estimating these effects. These techniques are developed via a regression model in which the regression coefficients are assumed to be random, with components of variance associated with the various stages of a multi-stage sample design.

Using network screening methods to determine locations with specific safety issues: A design consistency case study.

PubMed

Butsick, Andrew J; Wood, Jonathan S; Jovanis, Paul P

2017-09-01

The Highway Safety Manual provides multiple methods that can be used to identify sites with promise (SWiPs) for safety improvement. However, most of these methods cannot be used to identify sites with specific problems. Furthermore, given that infrastructure funding is often specified for use related to specific problems/programs, a method for identifying SWiPs related to those programs would be very useful. This research establishes a method for Identifying SWiPs with specific issues. This is accomplished using two safety performance functions (SPFs). This method is applied to identifying SWiPs with geometric design consistency issues. Mixed effects negative binomial regression was used to develop two SPFs using 5 years of crash data and over 8754km of two-lane rural roadway. The first SPF contained typical roadway elements while the second contained additional geometric design consistency parameters. After empirical Bayes adjustments, sites with promise (SWiPs) were identified. The disparity between SWiPs identified by the two SPFs was evident; 40 unique sites were identified by each model out of the top 220 segments. By comparing sites across the two models, candidate road segments can be identified where a lack design consistency may be contributing to an increase in expected crashes. Practitioners can use this method to more effectively identify roadway segments suffering from reduced safety performance due to geometric design inconsistency, with detailed engineering studies of identified sites required to confirm the initial assessment. Copyright © 2017 Elsevier Ltd. All rights reserved.

The Study on Human-Computer Interaction Design Based on the Users’ Subconscious Behavior

NASA Astrophysics Data System (ADS)

Li, Lingyuan

2017-09-01

Human-computer interaction is human-centered. An excellent interaction design should focus on the study of user experience, which greatly comes from the consistence between design and human behavioral habit. However, users’ behavioral habits often result from subconsciousness. Therefore, it is smart to utilize users’ subconscious behavior to achieve design's intention and maximize the value of products’ functions, which gradually becomes a new trend in this field.

Role of Cultural Inspiration with Different Types in Cultural Product Design Activities

ERIC Educational Resources Information Center

Luo, Shi-Jian; Dong, Ye-Nan

2017-01-01

Inspiration plays an important role in the design activities and design education. This paper describes "ancient cultural artefacts" as "cultural inspiration," consisting of two types called "cultural-pictorial inspiration" (CPI) and "cultural-textual inspiration" (CTI). This study aims to test the important…

Evaluation Study for Secondary Stage EFL Textbook: EFL Teachers' Perspectives

ERIC Educational Resources Information Center

Al Harbi, Abdullah Abdul Muhsen

2017-01-01

This study aimed at evaluating EFL textbook for secondary stage in Saudi Public schools. Participants consisted of (100) male teachers and (73) female teachers teaching secondary stage students in two cities: Madinah and Dowadmi. The tool of the study designed to cover five dimensions: layout and design, the objectives of the textbook, teaching…

New geometric design consistency model based on operating speed profiles for road safety evaluation.

PubMed

Camacho-Torregrosa, Francisco J; Pérez-Zuriaga, Ana M; Campoy-Ungría, J Manuel; García-García, Alfredo

2013-12-01

To assist in the on-going effort to reduce road fatalities as much as possible, this paper presents a new methodology to evaluate road safety in both the design and redesign stages of two-lane rural highways. This methodology is based on the analysis of road geometric design consistency, a value which will be a surrogate measure of the safety level of the two-lane rural road segment. The consistency model presented in this paper is based on the consideration of continuous operating speed profiles. The models used for their construction were obtained by using an innovative GPS-data collection method that is based on continuous operating speed profiles recorded from individual drivers. This new methodology allowed the researchers to observe the actual behavior of drivers and to develop more accurate operating speed models than was previously possible with spot-speed data collection, thereby enabling a more accurate approximation to the real phenomenon and thus a better consistency measurement. Operating speed profiles were built for 33 Spanish two-lane rural road segments, and several consistency measurements based on the global and local operating speed were checked. The final consistency model takes into account not only the global dispersion of the operating speed, but also some indexes that consider both local speed decelerations and speeds over posted speeds as well. For the development of the consistency model, the crash frequency for each study site was considered, which allowed estimating the number of crashes on a road segment by means of the calculation of its geometric design consistency. Consequently, the presented consistency evaluation method is a promising innovative tool that can be used as a surrogate measure to estimate the safety of a road segment. Copyright © 2012 Elsevier Ltd. All rights reserved.

Evaluation of the HFACS-ADF safety classification system: inter-coder consensus and intra-coder consistency.

PubMed

Olsen, Nikki S; Shorrock, Steven T

2010-03-01

This article evaluates an adaptation of the human factors analysis and classification system (HFACS) adopted by the Australian Defence Force (ADF) to classify factors that contribute to incidents. Three field studies were undertaken to assess the reliability of HFACS-ADF in the context of a particular ADF air traffic control (ATC) unit. Study one was designed to assess inter-coder consensus between many coders for two incident reports. Study two was designed to assess inter-coder consensus between one participant and the previous original analysts for a large set of incident reports. Study three was designed to test intra-coder consistency for four participants over many months. For all studies, agreement was low at the level of both fine-level HFACS-ADF descriptors and high-level HFACS-type categories. A survey of participants suggested that they were not confident that HFACS-ADF could be used consistently. The three field studies reported suggest that the ADF adaptation of HFACS is unreliable for incident analysis at the ATC unit level, and may therefore be invalid in this context. Several reasons for the results are proposed, associated with the underlying HFACS model and categories, the HFACS-ADF adaptations, the context of use, and the conduct of the studies. Copyright 2009 Elsevier Ltd. All rights reserved.

THE TREATMENT OF DISRUPTIVE CLASSROOM BEHAVIOR PROBLEMS BY EMPLOYMENT OF A PARTIAL-MILIEU CONSISTENCY PROGRAM. FINAL REPORT.

ERIC Educational Resources Information Center

COLLINS, RONALD C.

THIS STUDY ATTEMPTED TO DEVELOP AND EVALUATE A TREATMENT PROCEDURE DESIGNED TO REDUCE THE INCIDENCE OF MALADAPTIVE BEHAVIORS IN PUBLIC SCHOOL CLASSROOMS. THE TREATMENT PROCEDURE ATTEMPTED TO PROVIDE ENVIRONMENTAL CONSISTENCY IN THE CHILD'S ENVIRONMENT. IT WAS HYPOTHESIZED THAT GIVEN A PROGRAM OF HOME-SCHOOL CONSISTENCY, UNYIELDING FOR COMPLIANCE…

A Study of Consistency in Design Selection and the Rank Ordering of Alternatives Using a Value Driven Design Approach

NASA Astrophysics Data System (ADS)

Subramanian, Tenkasi R.

In the current day, with the rapid advancement in technology, engineering design is growing in complexity. Nowadays, engineers have to deal with design problems that are large, complex and involving multi-level decision analyses. With the increase in complexity and size of systems, the production and development cost tend to overshoot the allocated budget and resources. This often results in project delays and project cancellation. This is particularly true for aerospace systems. Value Driven Design proves to be means to strengthen the design process and help counter such trends. Value Driven is a novel framework for optimization which puts stakeholder preferences at the forefront of the design process to capture their true preferences to present system alternatives that are consistent the stakeholder's expectations. Traditional systems engineering techniques promote communication of stakeholder preferences in the form of requirements which confines the design space by imposing additional constraints on it. This results in a design that does not capture the true preferences of the stakeholder. Value Driven Design provides an alternate approach to design wherein a value function is created that corresponds to the true preferences of the stakeholder. The applicability of VDD broad, but it is imperative to first explore its feasibility to ensure the development of an efficient, robust and elegant system design. The key to understanding the usability of VDD is to investigate the formation, propagation and use of a value function. This research investigates the use of rank correlation metrics to ensure consistent rank ordering of design alternatives, while investigating the fidelity of the value function. The impact of design uncertainties on rank ordering. A satellite design system consisting of a satellite, ground station and launch vehicle is used to demonstrate the use of the metrics to aid in decision support during the design process.

Mandated Change Gone Wrong? A Case Study of Law-Based School Reform in South Africa

ERIC Educational Resources Information Center

Bisschoff, Tom

2009-01-01

Purpose: This paper aims to explore and describe the limits of recent law-based school reform in South Africa from an education management perspective. Design/methodology/approach: The research design consists of a qualitative, investigative, descriptive and contextual design which Merriam would classify as a basic or generic design type.…

A Study Investigating Indian Middle School Students' Ideas of Design and Designers

ERIC Educational Resources Information Center

Ara, Farhat; Chunawala, Sugra; Natarajan, Chitra

2011-01-01

This paper reports on an investigation into middle school students' naive ideas about, and attitudes towards design and designers. The sample for the survey consisted of students from Classes 7 to 9 from a school located in Mumbai. The data were analysed qualitatively and quantitatively to look for trends in students' responses. Results show that…

Student-Designed Experiments: A Pedagogical Design for Introductory Science Labs

ERIC Educational Resources Information Center

Coker, Jeffrey Scott

2017-01-01

Despite numerous calls for science education to be driven by authentic investigation, many laboratory experiences continue to consist of disconnected weekly units during which students carry out instructions that lead to some predetermined finding. This study developed and evaluated a pedagogical design for introductory biology labs where students…

The Elements and Principles of Design: A Baseline Study

ERIC Educational Resources Information Center

Adams, Erin

2013-01-01

Critical to the discipline, both professionally and academically, are the fundamentals of interior design. These fundamentals include the elements and principles of interior design: the commonly accepted tools and vocabulary used to create and communicate successful interior environments. Research indicates a lack of consistency in both the…

The Design and Development of an Online, Case-Based Course in a Teacher Preparation Program

ERIC Educational Resources Information Center

Peña, Carmen M.

2004-01-01

The goals of this study were to: 1) design a web-based course using WebCT for future secondary school teachers at the University of Texas Pan American, 2) evaluate the effectiveness of the course, and 3) provide a set of guidelines for designing web-based courses for other teacher educators. The participants in this study consisted of junior- and…

Association between Lifestyle and School Attendance in Japanese Medical Students: A Pilot Study

ERIC Educational Resources Information Center

Tanaka, Masaaki; Watanabe, Yasuyoshi

2012-01-01

Objective: Lifestyle factors are thought to be associated with students' academic performance. Whether lifestyle factors were associated with medical students' school attendance was determined. Design: Cross-sectional design. Setting: The study group consisted of 157 healthy second-year medical students attending Osaka City University Graduate…

CAMPUS DESIGN STUDY, DUKE UNIVERSITY.

ERIC Educational Resources Information Center

Caudill, Rowlett, Scott and Associates, Bryan, TX.

THE STUDY OF THIS UNIVERSITY DEALT PRIMARILY WITH THE WEST CAMPUS IN WHICH MAJOR FUTURE GROWTH WOULD OCCUR. PART 'A' CONSISTS OF AN ANALYSIS OF THE EXISTING ARCHITECTURE WITH RECOMMENDATIONS FOR FUTURE DESIGN CRITERIA. CHARACTER IS ANALYZED IN TERMS OF--(1) VERTICALITY, (2) SCALE, (3) RICHNESS, AND (4) VARIETY AND UNITY, WHILE ARCHITECTURAL…

Quantitative imaging biomarkers: a review of statistical methods for technical performance assessment.

PubMed

Raunig, David L; McShane, Lisa M; Pennello, Gene; Gatsonis, Constantine; Carson, Paul L; Voyvodic, James T; Wahl, Richard L; Kurland, Brenda F; Schwarz, Adam J; Gönen, Mithat; Zahlmann, Gudrun; Kondratovich, Marina V; O'Donnell, Kevin; Petrick, Nicholas; Cole, Patricia E; Garra, Brian; Sullivan, Daniel C

2015-02-01

Technological developments and greater rigor in the quantitative measurement of biological features in medical images have given rise to an increased interest in using quantitative imaging biomarkers to measure changes in these features. Critical to the performance of a quantitative imaging biomarker in preclinical or clinical settings are three primary metrology areas of interest: measurement linearity and bias, repeatability, and the ability to consistently reproduce equivalent results when conditions change, as would be expected in any clinical trial. Unfortunately, performance studies to date differ greatly in designs, analysis method, and metrics used to assess a quantitative imaging biomarker for clinical use. It is therefore difficult or not possible to integrate results from different studies or to use reported results to design studies. The Radiological Society of North America and the Quantitative Imaging Biomarker Alliance with technical, radiological, and statistical experts developed a set of technical performance analysis methods, metrics, and study designs that provide terminology, metrics, and methods consistent with widely accepted metrological standards. This document provides a consistent framework for the conduct and evaluation of quantitative imaging biomarker performance studies so that results from multiple studies can be compared, contrasted, or combined. © The Author(s) 2014 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

Absolute pressure transducers for space shuttle and orbiter propulsion and control systems

NASA Technical Reports Server (NTRS)

Bolta, J. J.

1974-01-01

A preliminary design was completed, reviewing of such subjects as: the trade studies for media isolation and one sensor vs. two sensors for two bridges; compensation resistors; unit design; hydrogen embrittlement; sealing techniques and test station design. A design substantiation phase was finished, consisting of testing of a prototype unit and fabrication technique studies. A cryogenic test station was implemented and prototype sensor cells were fabricated, sensors assembled, and cryogenic tests performed.

Design study and performance analysis of 12S-14P field excitation flux switching motor for hybrid electric vehicle

NASA Astrophysics Data System (ADS)

Husin, Zhafir Aizat; Sulaiman, Erwan; Khan, Faisal; Mazlan, Mohamed Mubin Aizat; Othman, Syed Muhammad Naufal Syed

2015-05-01

This paper presents a new structure of 12slot-14pole field excitation flux switching motor (FEFSM) as an alternative candidate of non-Permanent Magnet (PM) machine for HEV drives. Design study, performance analysis and optimization of field excitation flux switching machine with non-rare-earth magnet for hybrid electric vehicle drive applications is done. The stator of projected machine consists of iron core made of electromagnetic steels, armature coils and field excitation coils as the only field mmf source. The rotor is consisted of only stack of iron and hence, it is reliable and appropriate for high speed operation. The design target is a machine with the maximum torque, power and power density, more than 210Nm, 123kW and 3.5kW/kg, respectively, which competes with interior permanent magnet synchronous machine used in existing hybrid electric vehicle. Some design feasibility studies on FEFSM based on 2D-FEA and deterministic optimization method will be applied to design the proposed machine.

Design of rocker switches for work-vehicles--an application of Kansei Engineering.

PubMed

Schütte, Simon; Eklund, Jörgen

2005-09-01

Rocker switches used in vehicles meet high demands partly due to the increased focus on customer satisfaction. Previous studies focused on ergonomics and usability rather than design for emotions and affection. The aim of this study was to determine how and to what extent engineering properties influence the perception of rocker switches. Secondary aims were to compare two types of rating scales and to determine consistency over time of the ratings. As a method Kansei Engineering was used, describing a product domain from a physical and semantic point of view. A model was built and validated, and recommendations for new designs were given. It was seen that the subjective impressions of robustness, precision and design are strongly influenced by the zero position, the contact position, the form-ratio, shape and the surface of rocker switches. A 7-point scale was found suitable. The Kansei ratings were consistent over time.

Academic and Family Conditions Associated with Intrinsic Academic Motivation in Japanese Medical Students: A Pilot Study

ERIC Educational Resources Information Center

Tanaka, Masaaki; Watanabea, Yasuyoshi

2012-01-01

Objective: Intrinsic academic motivation is one of the most important psychological concepts in education, and it is related to academic outcomes in medical students. This study examined the relationships between academic and family conditions and intrinsic academic motivation. Design: Cross-sectional design. Setting: The study group consisted of…

Opinions of Teachers on Using Internet Searching Strategies: An Elementary School Case in Turkey

ERIC Educational Resources Information Center

Kabakci, Isil; Firat, Mehmet; Izmirli, Serkan; Kuzu, Elif Bugra

2010-01-01

The purpose of the current study is to determine opinions of teachers on using internet searching strategies in an elementary school. The study conducted through qualitative method was designed on survey research model. Participants were consisted of 21 teachers at an elementary school in Eskisehir in Turkey. Questionnaires consisting of…

Teacher's Differentiated Instruction Practices and Implementation Challenges for Learning Disabilities in Jordan

ERIC Educational Resources Information Center

Siam, Karam; Al-Natour, Mayada

2016-01-01

This study aimed to identify the differentiated instruction practices used by Jordanian teachers and the challenges they faced when teaching students with learning disabilities in Amman. The sample of the study consisted of 194 teachers. It followed a mixed method design and consisted of two parts. First, a quantitative analysis of a questionnaire…

Design, analysis, and control of a large transport aircraft utilizing selective engine thrust as a backup system for the primary flight control. Ph.D. Thesis

NASA Technical Reports Server (NTRS)

Gerren, Donna S.

1995-01-01

A study has been conducted to determine the capability to control a very large transport airplane with engine thrust. This study consisted of the design of an 800-passenger airplane with a range of 5000 nautical miles design and evaluation of a flight control system, and design and piloted simulation evaluation of a thrust-only backup flight control system. Location of the four wing-mounted engines was varied to optimize the propulsive control capability, and the time constant of the engine response was studied. The goal was to provide level 1 flying qualities. The engine location and engine time constant did not have a large effect on the control capability. The airplane design did meet level 1 flying qualities based on frequencies, damping ratios, and time constants in the longitudinal and lateral-directional modes. Project pilots consistently rated the flying qualities as either level 1 or level 2 based on Cooper-Harper ratings. However, because of the limited control forces and moments, the airplane design fell short of meeting the time required to achieve a 30 deg bank and the time required to respond a control input.

Alternative design consistency rating methods for two-lane rural highways

DOT National Transportation Integrated Search

2000-08-01

Design consistency refers to the conformance of a highway's geometry with driver expectancy. Drivers make fewer errors in the vicinity of geometric features that conform with their expectations. Techniques to evaluate the consistency of a design docu...

Evaluation of design consistency methods for two-lane rural highways : executive summary

DOT National Transportation Integrated Search

2000-08-01

Design consistency refers to the conformance of a highway's geometry with driver expectancy. Techniques to evaluate the consistency of a design documented within this report include speed-profile model, alignment indices, speed distribution measures,...

Evidence-Based Conclusions Concerning Practice, Curriculum Design and Curriculum Reform in a Civil Engineering Capstone Design Course in Hong Kong

ERIC Educational Resources Information Center

Chan, Cecilia K. Y.; Wong, George C. K.; Law, Ada K. H.; Zhang, T.; Au, Francis T. K.

2017-01-01

This study aimed to provide evidence-based conclusions from students concerning a capstone-design course in a civil engineering programme in Hong Kong. The evidence was generated by designing a student-experience questionnaire. The questionnaire instrument was assessed for internal consistency in four scales (curriculum and structure changes;…

Operator Station Design System - A computer aided design approach to work station layout

NASA Technical Reports Server (NTRS)

Lewis, J. L.

1979-01-01

The Operator Station Design System is resident in NASA's Johnson Space Center Spacecraft Design Division Performance Laboratory. It includes stand-alone minicomputer hardware and Panel Layout Automated Interactive Design and Crew Station Assessment of Reach software. The data base consists of the Shuttle Transportation System Orbiter Crew Compartment (in part), the Orbiter payload bay and remote manipulator (in part), and various anthropometric populations. The system is utilized to provide panel layouts, assess reach and vision, determine interference and fit problems early in the design phase, study design applications as a function of anthropometric and mission requirements, and to accomplish conceptual design to support advanced study efforts.

Optimization of traffic data collection for specific pavement design applications.

DOT National Transportation Integrated Search

2006-05-01

The objective of this study is to establish the minimum traffic data collection effort required for pavement design applications satisfying a maximum acceptable error under a prescribed confidence level. The approach consists of simulating the traffi...

What Works Clearinghouse Standards and Generalization of Single-Case Design Evidence

ERIC Educational Resources Information Center

Hitchcock, John H.; Kratochwill, Thomas R.; Chezan, Laura C.

2015-01-01

A recent review of existing rubrics designed to help researchers evaluate the internal and external validity of single-case design (SCD) studies found that the various options yield consistent results when examining causal arguments. The authors of the review, however, noted considerable differences across the rubrics when addressing the…

Optimal and Nonoptimal Computer-Based Test Designs for Making Pass-Fail Decisions

ERIC Educational Resources Information Center

Hambleton, Ronald K.; Xing, Dehui

2006-01-01

Now that many credentialing exams are being routinely administered by computer, new computer-based test designs, along with item response theory models, are being aggressively researched to identify specific designs that can increase the decision consistency and accuracy of pass-fail decisions. The purpose of this study was to investigate the…

A Database Design and Development Case: NanoTEK Networks

ERIC Educational Resources Information Center

Ballenger, Robert M.

2010-01-01

This case provides a real-world project-oriented case study for students enrolled in a management information systems, database management, or systems analysis and design course in which database design and development are taught. The case consists of a business scenario to provide background information and details of the unique operating…

Mathematical Aspects of Educating Architecture Designers: A College Study

ERIC Educational Resources Information Center

Verner, I. M.; Maor, S.

2005-01-01

This paper considers a second-year Mathematical Aspects in Architectural Design course, which relies on a first-year mathematics course and offers mathematical learning as part of hands-on practice in architecture design studio. The 16-hour course consisted of seminar presentations of mathematics concepts, their application to covering the plane…

Teaching Improvement Model Designed with DEA Method and Management Matrix

ERIC Educational Resources Information Center

Montoneri, Bernard

2014-01-01

This study uses student evaluation of teachers to design a teaching improvement matrix based on teaching efficiency and performance by combining management matrix and data envelopment analysis. This matrix is designed to formulate suggestions to improve teaching. The research sample consists of 42 classes of freshmen following a course of English…

Comparative study of control selection in a national population-based case-control study: Estimating risk of smoking on cancer deaths in Chinese men.

PubMed

Jiang, Jingmei; Liu, Boqi; Nasca, Philip C; Han, Wei; Zou, Xiaonong; Zeng, Xianjia; Tian, Xiaobing; Wu, Yanping; Zhao, Ping; Li, Junyao

2009-10-28

To assess the validation of a novel control selection design by comparing the consistency between the new design and a routine design in a large case-control study that was incorporated into a nationwide mortality survey in China. A nationwide mortality study was conducted during 1989-1991. Surviving spouses or other relatives of all adults who died during 1986-1988 provided detailed information about their own as well as the deceased person's smoking history. In this study, 130,079 males who died of various smoking-related cancers at age 35 or over were taken as cases, while 103,248 male surviving spouses (same age range with cases) of women who died during the same period and 49,331 males who died from causes other than those related to smoking were used as control group 1 and control group 2, respectively. Consistency in the results when comparing cases with each of the control groups was assessed. Consistency in the results was observed in the analyses using different control groups although cancer deaths varied with region and age. Equivalence could be ascertained using a 15% criterion in most cancer deaths which had high death rates in urban areas, but they were uncertain for most cancers in rural areas irrespective of whether the hypothesis testing showed significant differences or not. Sex-matched living spouse control design as an alternative control selection for a case-control study is valid and feasible, and the basic principles of the equivalence study are also supported by epidemiological survey data.

Organizational Socialization and Its Relation with Organizational Performance in High Schools

ERIC Educational Resources Information Center

Balci, Ali; Ozturk, Inci; Polatcan, Mahmut; Saylik, Ahmet; Bil, Erkut

2016-01-01

This study is designed to explore organizational socialization and organizational performance levels of secondary school teachers and the relation between the two variables mentioned. The study is designed as correlational research. The target population of the research consists of 5744 teachers who work in public and private Anatolian high…

Study of Vermont: A Curriculum Designed for Grades 4-6.

ERIC Educational Resources Information Center

Dubuque, Martha L.

Designed for use in grades 4-6, this guide consists of four basic units related to the study of Vermont: Indian Civilization, Vermont History, Geography and Economics, and Cities and Towns. Each unit lists key concepts, content objectives, skills objectives, and related objectives. Next, specialized vocabulary as well as common, essential…

Curriculum Design Orientations Preference Scale of Teachers: Validity and Reliability Study

ERIC Educational Resources Information Center

Bas, Gokhan

2013-01-01

The purpose of this study was to develop a valid and reliable scale for preferences of teachers in regard of their curriculum design orientations. Because there was no scale development study similar to this one in Turkey, it was considered as an urgent need to develop such a scale in the study. The sample of the research consisted of 300…

Pre-Service Teachers' Competencies and Perceptions of Necessity about Practical Tools for Content Development

ERIC Educational Resources Information Center

Eren, Esra; Avci, Zeynep Yurtseven; Kapucu, Munise Seckin

2015-01-01

The purpose of the study is to investigate pre-service teachers' competencies and their perceptions of necessity about using practical tools for content development. The study was designed using pre- and post-test experimental design method. The study group consisted of 170 pre-service teachers at a public university in Turkey. The Practical Tools…

Using Neural Networks in the Mapping of Mixed Discrete/Continuous Design Spaces With Application to Structural Design

DTIC Science & Technology

1994-02-01

desired that the problem to which the design space mapping techniques were applied be easily analyzed, yet provide a design space with realistic complexity...consistent fully stressed solution. 3 DESIGN SPACE MAPPING In order to reduce the computational expense required to optimize design spaces, neural networks...employed in this study. Some of the issues involved in using neural networks to do design space mapping are how to configure the neural network, how much

High Powered Rocketry: Design, Construction, and Launching Experience and Analysis

ERIC Educational Resources Information Center

Paulson, Pryce; Curtis, Jarret; Bartel, Evan; Cyr, Waycen Owens; Lamsal, Chiranjivi

2018-01-01

In this study, the nuts and bolts of designing and building a high powered rocket have been presented. A computer simulation program called RockSim was used to design the rocket. Simulation results are consistent with time variations of altitude, velocity, and acceleration obtained in the actual flight. The actual drag coefficient was determined…

Optimization of Blocked Designs in fMRI Studies

ERIC Educational Resources Information Center

Maus, Barbel; van Breukelen, Gerard J. P.; Goebel, Rainer; Berger, Martijn P. F.

2010-01-01

Blocked designs in functional magnetic resonance imaging (fMRI) are useful to localize functional brain areas. A blocked design consists of different blocks of trials of the same stimulus type and is characterized by three factors: the length of blocks, i.e., number of trials per blocks, the ordering of task and rest blocks, and the time between…

Front-End and Back-End Database Design and Development: Scholar's Academy Case Study

ERIC Educational Resources Information Center

Parks, Rachida F.; Hall, Chelsea A.

2016-01-01

This case study consists of a real database project for a charter school--Scholar's Academy--and provides background information on the school and its cafeteria processing system. Also included are functional requirements and some illustrative data. Students are tasked with the design and development of a database for the purpose of improving the…

The Impact of Critical Thinking and Logico-Mathematical Intelligence on Algorithmic Design Skills

ERIC Educational Resources Information Center

Korkmaz, Ozgen

2012-01-01

The present study aims to reveal the impact of students' critical thinking and logico-mathematical intelligence levels of students on their algorithm design skills. This research was a descriptive study and carried out by survey methods. The sample consisted of 45 first-year educational faculty undergraduate students. The data was collected by…

TAGS 85/2N RTG Power for Viking Lander Capsule

DOE R&D Accomplishments Database

1969-08-01

Results of studies performed by Isotopes, Inc., Nuclear Systems Division, to optimize and baseline a TAGS 85/2N RTG for the Viking Lander Capsule prime electrical power source are presented. These studies generally encompassed identifying the Viking RTG mission profile and design requirements, and establishing a baseline RTG design consistent with these requirements.

Large space telescope, phase A. Volume 1: Executive summary

NASA Technical Reports Server (NTRS)

1972-01-01

The Phase A study of the Large Space Telescope (LST) is reported. The study defines an LST concept based on the broad mission guidelines provided by the Office of Space Science (OSS), the scientific requirements developed by OSS with the scientific community, and an understanding of long range NASA planning current at the time the study was performed. The LST is an unmanned astronomical observatory facility, consisting of an optical telescope assembly (OTA), scientific instrument package (SIP), and a support systems module (SSM). The report consists of five volumes. The report describes the constraints and trade off analyses that were performed to arrive at a reference design for each system and for the overall LST configuration. A low cost design approach was followed in the Phase A study. This resulted in the use of standard spacecraft hardware, the provision for maintenance at the black box level, growth potential in systems designs, and the sharing of shuttle maintenance flights with other payloads.

Staff Perspectives on the Use of a Computer-Based Concept for Lifestyle Intervention Implemented in Primary Health Care

ERIC Educational Resources Information Center

Carlfjord, Siw; Johansson, Kjell; Bendtsen, Preben; Nilsen, Per; Andersson, Agneta

2010-01-01

Objective: The aim of this study was to evaluate staff experiences of the use of a computer-based concept for lifestyle testing and tailored advice implemented in routine primary health care (PHC). Design: The design of the study was a cross-sectional, retrospective survey. Setting: The study population consisted of staff at nine PHC units in the…

High Fidelity Modeling of Field Reversed Configuration (FRC) Thrusters

DTIC Science & Technology

2016-06-01

space propulsion . This effort consists of numerical model development, physical model development, and systematic studies of the non-linear plasma...studies of the physical characteristics of Field Reversed Configuration (FRC) plasma for advanced space propulsion . This effort consists of numerical...FRCs for propulsion application. Two of the most advanced designs are based on the theta-pinch formation and the RMF formation mechanism, which

The Degree of Faculty's Use and Stimulation of Students' Critical Thinking from the Perspective of English Majors at Al-Quds University

ERIC Educational Resources Information Center

Naser, Inas Aref Saleh; Nafi, Jamal Subhi Ismail; Arman, Ibrahim Moh'd Abdel-rahman

2016-01-01

The purpose of this study is to determine the degree of faculty's use and stimulation of critical thinking skills in the English Department at Al-Quds University. To achieve the objective of the study, a questionnaire consisting of 21 items was designed and applied to the study sample, consisting of 95 students in the English Department at Al-Quds…

Common Student Misconceptions in Exercise Physiology and Biochemistry

ERIC Educational Resources Information Center

Morton, James P.; Doran, Dominic A.; MacLaren, Don P. M.

2008-01-01

The present study represents a preliminary investigation designed to identify common misconceptions in students' understanding of physiological and biochemical topics within the academic domain of sport and exercise sciences. A specifically designed misconception inventory (consisting of 10 multiple-choice questions) was administered to a cohort…

Statistical analysis of weigh-in-motion data for bridge design in Vermont.

DOT National Transportation Integrated Search

2014-10-01

This study investigates the suitability of the HL-93 live load model recommended by AASHTO LRFD Specifications : for its use in the analysis and design of bridges in Vermont. The method of approach consists in performing a : statistical analysis of w...

Advanced composite elevator for Boeing 727 aircraft, volume 2

NASA Technical Reports Server (NTRS)

Chovil, D. V.; Grant, W. D.; Jamison, E. S.; Syder, H.; Desper, O. E.; Harvey, S. T.; Mccarty, J. E.

1980-01-01

Preliminary design activity consisted of developing and analyzing alternate design concepts and selecting the optimum elevator configuration. This included trade studies in which durability, inspectability, producibility, repairability, and customer acceptance were evaluated. Preliminary development efforts consisted of evaluating and selecting material, identifying ancillary structural development test requirements, and defining full scale ground and flight test requirements necessary to obtain Federal Aviation Administration (FAA) certification. After selection of the optimum elevator configuration, detail design was begun and included basic configuration design improvements resulting from manufacturing verification hardware, the ancillary test program, weight analysis, and structural analysis. Detail and assembly tools were designed and fabricated to support a full-scope production program, rather than a limited run. The producibility development programs were used to verify tooling approaches, fabrication processes, and inspection methods for the production mode. Quality parts were readily fabricated and assembled with a minimum rejection rate, using prior inspection methods.

Decoding the "CoDe": A Framework for Conceptualizing and Designing Help Options in Computer-Based Second Language Listening

ERIC Educational Resources Information Center

Cardenas-Claros, Monica Stella; Gruba, Paul A.

2013-01-01

This paper proposes a theoretical framework for the conceptualization and design of help options in computer-based second language (L2) listening. Based on four empirical studies, it aims at clarifying both conceptualization and design (CoDe) components. The elements of conceptualization consist of a novel four-part classification of help options:…

Online Case-Based Learning Design for Facilitating Classroom Teachers' Development of Technological, Pedagogical, and Content Knowledge

ERIC Educational Resources Information Center

Saltan, Fatih

2017-01-01

The aim of this study is to investigate whether, and if so how, online case-based learning influence pre-service classroom teachers' self-confidence on technological pedagogical content knowledge (TPACK). To achieve the goal, a control group pretest-posttest quasi experimental design was used. Participants of the study consisted of 160 pre-service…

Proposing a New Pedagogy-Based Website Design: A Usability Test with Lifelong Learners

ERIC Educational Resources Information Center

Khlaisang, Jintavee

2017-01-01

This study aimed to create a new pedagogy-based website based on the analysis of the needs of 7147 website users who visited the Thailand Cyber University (TCU) project website during 2011-2013. The study consisted of 4 stages: (1) examining learners' needs and literature related to developing a lifelong learning framework, (2) designing a site…

Natural environment design criteria for the space station program definition phase

NASA Technical Reports Server (NTRS)

Vaughan, W. W.

1984-01-01

The natural environment design criteria requirements for use in the Space Station and its Elements (SSPE) definition phase studies are presented. The atmospheric dynamic and thermodynamic environments, meteoroids, radiation, physical constants are addressed. It is intended to enable all groups involved in the definition phase studies to proceed with a common and consistent set of natural environment criteria requirements.

An Investigation of GeoBase Mission Data Set Design, Implementation, and Usage Within Air Force Civil Engineer Electrical and Utilities Work Centers

DTIC Science & Technology

2005-03-01

ethnography , grounded theory , phenomenological , case study , and content analysis. As ethnography is based upon a longitudinal study in...a qualitative methodology consisting of a case study strategy is warranted for this research project. Yin (2003) lists five components of research ...systems. Journal of End User Computing, 12(3), 14. Yin, R. K. (2003). Case Study Research : Design and

A Quality Instrument for Effective Honors Program Review

ERIC Educational Resources Information Center

Smith, Patricia Joanne

2015-01-01

Although the number of honors programs and colleges has grown dramatically over the last twenty years to over a thousand programs nationally, little has been done to develop consistency of standards in honors. In the interest of seeking consistency, the author designed a research study to provide initial insights into assessable measures that a…

Space station WP-04 power system. Volume 1: Executive summary

NASA Technical Reports Server (NTRS)

Hallinan, G. J.

1987-01-01

Major study activities and results of the phase B study contract for the preliminary design of the space station Electrical Power System (EPS) are summarized. The areas addressed include the general system design, man-tended option, automation and robotics, evolutionary growth, software development environment, advanced development, customer accommodations, operations planning, product assurance, and design and development phase planning. The EPS consists of a combination photovoltaic and solar dynamic power generation subsystem and a power management and distribution (PMAD) subsystem. System trade studies and costing activities are also summarized.

A Research Study Using the Delphi Method to Define Essential Competencies for a High School Game Art and Design Course Framework at the National Level

ERIC Educational Resources Information Center

Mack, Nayo Corenus-Geneva

2011-01-01

This research study reports the findings of a Delphi study conducted to determine the essential competencies and objectives for a high school Game Art and Design course framework at the national level. The Delphi panel consisted of gaming, industry and educational experts from all over the world who were members of the International Game…

Exploring Persona-Scenarios - Using Storytelling to Create Design Ideas

NASA Astrophysics Data System (ADS)

Madsen, Sabine; Nielsen, Lene

This paper explores the persona-scenario method by investigating how the method can support project participants in generating shared understandings and design ideas. As persona-scenarios are stories we draw on narrative theory to define what a persona-scenario is and which narrative elements it should consist of. Based on an empirical study a key finding is that despite our inherent human ability to construct, tell, and interpret stories it is not easy to write and present a good, coherent, and design-oriented story without methodical support. The paper therefore contributes with guidelines that delineate a) what a design-oriented persona-scenario should consist of (product) and b) how to write it (procedure) in order to generate and validate as many, new, and shared understandings and design ideas as possible (purpose). The purpose of the guidelines is to facilitate the construction of persona-scenarios as good, coherent stories, which make sense to the storytellers and to the audience - and which therefore generate many, new, and shared understandings and design ideas.

The conception, birth, and growth of a missile umbilical system

NASA Technical Reports Server (NTRS)

Nordman, G. W.

1977-01-01

The design development was traced for the sprint 2 and improved sprint 2 missile system (ISMS) umbilical system. The unique system requirements, umbilical designs considered to meet the requirements, and the problems encountered and solutions derived during the design, and development testing of the selected systems are described. The sprint 2 development effort consisted of design, analysis, and testing activities. The ISMS effort involved the performance of an extensive trade study to determine the optimum design to meet the ISMS conditions.

Space shuttle hypergolic bipropellant RCS engine design study, Bell model 8701

NASA Technical Reports Server (NTRS)

1974-01-01

A research program was conducted to define the level of the current technology base for reaction control system rocket engines suitable for space shuttle applications. The project consisted of engine analyses, design, fabrication, and tests. The specific objectives are: (1) extrapolating current engine design experience to design of an RCS engine with required safety, reliability, performance, and operational capability, (2) demonstration of multiple reuse capability, and (3) identification of current design and technology deficiencies and critical areas for future effort.

Consistency and Reproducibility of Bioaerosol Delivery for Infectivity Studies on Mice

DTIC Science & Technology

2010-03-01

respiration, the most common being the common laboratory rat (strains of Rattus norvegicus) and mouse ( Mus musculus ). Animal respiratory systems are...validation U U U UU 92 Joseph D. Wander Reset CONSISTENCY AND REPRODUCIBILITY OF BIOAEROSOL DELIVERY FOR INFECTIVITY STUDIES ON MICE...design and construction phase of the project. The data from this thesis appear as part of the US Air Force Research Laboratory technical report AFRL

Verification of the FtCayuga fault-tolerant microprocessor system. Volume 1: A case study in theorem prover-based verification

NASA Technical Reports Server (NTRS)

Srivas, Mandayam; Bickford, Mark

1991-01-01

The design and formal verification of a hardware system for a task that is an important component of a fault tolerant computer architecture for flight control systems is presented. The hardware system implements an algorithm for obtaining interactive consistancy (byzantine agreement) among four microprocessors as a special instruction on the processors. The property verified insures that an execution of the special instruction by the processors correctly accomplishes interactive consistency, provided certain preconditions hold. An assumption is made that the processors execute synchronously. For verification, the authors used a computer aided design hardware design verification tool, Spectool, and the theorem prover, Clio. A major contribution of the work is the demonstration of a significant fault tolerant hardware design that is mechanically verified by a theorem prover.

Design of a low-cost, compact SRF accelerator for flue gas and wastewater treatment

DOE Office of Scientific and Technical Information (OSTI.GOV)

Ciovati, Gianluigi

2016-04-01

Funding is being requested pursuant to a proposal that was submitted and reviewed through the Portfolio Analysis and Management System (PAMS). PAMS Proposal ID: 222439. The proposed project consists of the design of a novel superconducting continuous-wave accelerator capable of providing a beam current of ~1 A at an energy of 1-2 MeV for the treatment of flue gases and wastewater streams. The novel approach consists on studying the feasibility of using a single-cell Nb cavity coated with a thin Nb3Sn layer of the inner surface and conductively cooled by to 4.2 K by cryocoolers inside a compact cryomodule. Themore » proposed study will include beam transport simulations, thermal and mechanical engineering analysis of the cryomodule and a cost analysis for both the fabrications costs and the operational and maintenance costs of such accelerator. The outcome of the project will be a report summarizing the analysis and results from the design study.« less

New Horizons: Designing and Measuring for Modern Learning Environments

ERIC Educational Resources Information Center

Carter, Richard Allen, Jr.

2017-01-01

This dissertation consists of five chapters. The first chapter serves to introduce the Modern Learning Environment (MLE) by discussing the challenges of designing and measuring student performance in these novel environments. Chapter two of the dissertation reviews the current research base of studying self-regulated learning in the modern…

Alteration of fasting heat production during fescue toxicosis in Holstein steers

USDA-ARS?s Scientific Manuscript database

This study was designed to examine alteration of fasting heat production (FHP) during fescue toxicosis. Six ruminally cannulated Holstein steers (BW = 348±26kg) were weight matched into pairs and utilized in a two period crossover design experiment. Each period consisted of two segments, one each at...

Effect Size Calculations and Single Subject Designs

ERIC Educational Resources Information Center

Olive, Melissa L.; Smith, Benjamin W.

2005-01-01

This study compared visual analyses with five alternative methods for assessing the magnitude of effect with single subject designs. Each method was successful in detecting intervention effect. When rank ordered, each method was consistent in identifying the participants with the largest effect. We recommend the use of the standard mean difference…

Alteration of fasting heat production during fescue toxicosis in Holstein steers

USDA-ARS?s Scientific Manuscript database

This study was designed to examine alteration of fasting heat production (FHP) during fescue toxicosis. Six ruminally cannulated Holstein steers (BW=348 ±13 kg) were weight-matched into pairs and utilized in a two period crossover design experiment. Each period consisted of two temperature segments,...

Toxic Hazards Research Unit 1989

DTIC Science & Technology

1990-10-01

frequently be developed to drive the experimental design and to assist in risk avsessments. The Toxic Hazards Division, Harry G. Armstrong Aerospace...postexposure, respectively. The experimental design (Section 3.3, Subchronic Inhalation Toxicity Studies on 3.1 Oil at Concentrations of 250, 50, and...sodium salt and the pH was adjusted to 7.4. 101 EXPERIMENTAL DESIGN Initiation Assessment A total of seven groups consisting of eight animals per

The Effect of Learning Cycle Constructivist-Based Approach on Students' Academic Achievement and Attitude towards Chemistry in Secondary Schools in North-Eastern Part of Nigeria

ERIC Educational Resources Information Center

Jack, Gladys Uzezi

2017-01-01

This study investigated the effect of learning cycle constructivist-based approach on secondary schools students' academic achievement and their attitude towards chemistry. The design used was a pre-test, post-test non randomized control group quasi experimental research design. The design consisted of two instructional groups (learning cycle…

Calibration of the inertial consistency index to assess road safety on horizontal curves of two-lane rural roads.

PubMed

Llopis-Castelló, David; Camacho-Torregrosa, Francisco Javier; García, Alfredo

2018-05-26

One of every four road fatalities occurs on horizontal curves of two-lane rural roads. To this regard, many studies have been undertaken to analyze the crash risk on this road element. Most of them were based on the concept of geometric design consistency, which can be defined as how drivers' expectancies and road behavior relate. However, none of these studies included a variable which represents and estimates drivers' expectancies. This research presents a new local consistency model based on the Inertial Consistency Index (ICI). This consistency parameter is defined as the difference between the inertial operating speed, which represents drivers' expectations, and the operating speed, which represents road behavior. The inertial operating speed was defined as the weighted average operating speed of the preceding road section. In this way, different lengths, periods of time, and weighting distributions were studied to identify how the inertial operating speed should be calculated. As a result, drivers' expectancies should be estimated considering 15 s along the segment and a linear weighting distribution. This was consistent with drivers' expectancies acquirement process, which is closely related to Short-Term Memory. A Safety Performance Function was proposed to predict the number of crashes on a horizontal curve and consistency thresholds were defined based on the ICI. To this regard, the crash rate increased as the ICI increased. Finally, the proposed consistency model was compared with previous models. As a conclusion, the new Inertial Consistency Index allowed a more accurate estimation of the number of crashes and a better assessment of the consistency level on horizontal curves. Therefore, highway engineers have a new tool to identify where road crashes are more likely to occur during the design stage of both new two-lane rural roads and improvements of existing highways. Copyright © 2018 Elsevier Ltd. All rights reserved.

Problem Implementation as a Lever for Change: An Experimental Study of the Effects of a Professional Development Program on Students' Mathematics Learning

ERIC Educational Resources Information Center

Santagata, Rossella; Kersting, Nicole; Givvin, Karen B.; Stigler, James W.

2011-01-01

This study investigates, through an experimental design, the effectiveness of a professional development program on teacher knowledge and practices and on student learning. The program consisted of a series of video-based modules designed to respond to needs of U.S. teachers, as highlighted by findings from the 1999 Third International Mathematics…

Factors Influencing Low Level of Women Participation in Literacy Programme in Maiha Local Government Area of Adamawa State

ERIC Educational Resources Information Center

Daniel, Aminchi

2015-01-01

This study was designed to determine the extent to which poverty, gender stereotype, socio-cultural belief and lack of awareness influence low level of women participation in literacy programme in Maiha Local Government Area of Adamawa State. Survey designed was adopted for the study and a sample consisting of three hundred (300) women who were…

The Effects of Swedish Knife Model on Students' Understanding of the Digestive System

ERIC Educational Resources Information Center

Cerrah Ozsevgec, Lale; Artun, Huseyin; Unal, Melike

2012-01-01

This study was designed to examine the effect of Swedish Knife Model on students' understanding of digestive system. A simple experimental design (pretest-treatment-posttest) was used in the study and internal comparison of the results of the one group was made. The sample consisted of 40 7th grade Turkish students whose ages range from 13 to 15.…

The Effect of Lego Mindstorms Ev3 Based Design Activities on Students' Attitudes towards Learning Computer Programming, Self-Efficacy Beliefs and Levels of Academic Achievement

ERIC Educational Resources Information Center

Korkmaz, Özgen

2016-01-01

The aim of the study was to present the effect of Lego Mindstorms Ev3 based design activities on students' attitudes towards learning computer programming, self-efficacy beliefs and levels of academic achievement. The research is a pretest-posttest with control group semi-experimental study. The study group of the research consisted of 53 students…

Outcome-Dependent Sampling Design and Inference for Cox's Proportional Hazards Model.

PubMed

Yu, Jichang; Liu, Yanyan; Cai, Jianwen; Sandler, Dale P; Zhou, Haibo

2016-11-01

We propose a cost-effective outcome-dependent sampling design for the failure time data and develop an efficient inference procedure for data collected with this design. To account for the biased sampling scheme, we derive estimators from a weighted partial likelihood estimating equation. The proposed estimators for regression parameters are shown to be consistent and asymptotically normally distributed. A criteria that can be used to optimally implement the ODS design in practice is proposed and studied. The small sample performance of the proposed method is evaluated by simulation studies. The proposed design and inference procedure is shown to be statistically more powerful than existing alternative designs with the same sample sizes. We illustrate the proposed method with an existing real data from the Cancer Incidence and Mortality of Uranium Miners Study.

The Teenage Nonviolence Test: Internal Consistency and Stability.

ERIC Educational Resources Information Center

Mayton, Daniel M., II; Weedman, Jonathon; Sonnen, Jennifer; Grubb, Celeste; Hirose, Masa

This research study was designed to establish the reliability of the Teenage Nonviolence Test (TNT). The consistency and factor structure of the TNT using a sample of 376 adolescents were evaluated. The stability of the TNT was assessed over time by administering the TNT twice with a two week intervening interval to 87 adolescents. The TNT appears…

Student Teachers' Experiences of Teaching Practice at Open and Distance Learning Institution in South Africa

ERIC Educational Resources Information Center

Mokoena, Sello

2017-01-01

This small-scale study focused on the experiences of student teachers towards teaching practice in an open and distance learning (ODL) institution in South Africa. The sample consisted of 65 fourth year students enrolled for Bachelor of Education, specializing in secondary school teaching. The mixed-method research design consisting of…

An Analysis of the Effects of Communication Skills Training Provided to the Mothers of Six-Year-Old Children on the Social Skills of Children

ERIC Educational Resources Information Center

Erbay, Filiz; Arslan, Emel; Cagdas, Aysel

2011-01-01

This study aims to analyze the effects of communication skills training program provided to the mothers on the social skills of their children. The study uses pre- and post- tests control group design. Experiment and control groups consisted of a total of 30 six-year-old children who were enrolled in nursery school. Experiment group consisted of…

Office design and health: a systematic review.

PubMed

Richardson, Ann; Potter, John; Paterson, Margaret; Harding, Thomas; Tyler-Merrick, Gaye; Kirk, Ray; Reid, Kate; McChesney, Jane

2017-12-15

To carry out a systematic review of recent research into the effects of workplace design, comparing individual with shared workspaces, on the health of employees. The research question was "Does workplace design (specifically individual offices compared with shared workspaces) affect the health of workers?" A literature search limited to articles published between 2000 and 2017 was undertaken. A systematic review was carried out, and the findings of the reviewed studies grouped into themes according to the primary outcomes measured in the studies. The literature search identified 15 relevant studies addressing health effects of shared or open-plan offices compared with individual offices. Our systematic review found that, compared with individual offices, shared or open-plan office space is not beneficial to employees' health, with consistent findings of deleterious effects on staff health, wellbeing and productivity. Our findings are also consistent with those of earlier reviews. These findings have public health implications for the New Zealand workforce. Decisions about workplace design should include weighing the short-term financial benefits of open-plan or shared workspaces against the significant harms, including increased sickness absence, lower job satisfaction and productivity, and possible threats to recruitment and retention of staff.

Design and implementation of ergonomic performance measurement system at a steel plant in India.

PubMed

Ray, Pradip Kumar; Tewari, V K

2012-01-01

Management of Tata Steel, the largest steel making company of India in the private sector, felt the need to develop a framework to determine the levels of ergonomic performance at its different workplaces. The objectives of the study are manifold: to identify and characterize the ergonomic variables for a given worksystem with regard to work efficiency, operator safety, and working conditions, to design a comprehensive Ergonomic Performance Indicator (EPI) for quantitative determination of the ergonomic status and maturity of a given worksystem. The study team of IIT Kharagpur consists of three faculty members and the management of Tata Steel formed a team of eleven members for implementation of EPI model. In order to design and develop the EPI model with total participation and understanding of the concerned personnel of Tata Steel, a three-phase action plan for the project was prepared. The project consists of three phases: preparation and data collection, detailed structuring and validation of EPI model. Identification of ergonomic performance factors, development of interaction matrix, design of assessment tool, and testing and validation of assessment tool (EPI) in varied situations are the major steps in these phases. The case study discusses in detail the EPI model and its applications.

Interprofessional Online Global Health Course

PubMed Central

Devraj, Radhika; Blankson, Faustina; Xin, Huaibo

2016-01-01

Objective. The design and evaluation of an online global health course targeted for pharmacy and other undergraduates is presented. Design. Enrolled students represented nursing, health education, pharmacy and a variety of other disciplines. The course was designed as an entirely online one with no class meetings. The course consisted of eight modules addressing global health competencies and interprofessional education competencies. Readings, quizzes, study question and team projects were tailored to the goals of each module. Students worked in interprofessional teams for their team projects. Assessment. Assessments consisted of pre and post course perceptions and course evaluation. Rubrics were designed to evaluate team assignments and peer assessment of team participation. Conclusion. Course was successful in enhancing perceptions of global health knowledge and understanding of roles and responsibilities of various health disciplines in addressing challenges of global health. No changes in teamwork perceptions were documented after completing the course. The overall course structure was successful in meeting course goals. PMID:28090104

Designing More Effective Accountability Report Cards

ERIC Educational Resources Information Center

Sabbah, Faris M.

2011-01-01

The purpose of this study was to identify and design standards and procedures for creating easily interpreted accountability reports cards, consistent with the requirements spelled out in the No Child Left Behind Act of 2001 (NCLB). The use of public report cards was first raised during the debate that took place immediately prior to the passage…

Design of a Comprehensive Biochemistry and Molecular Biology Experiment: Phase Variation Caused by Recombinational Regulation of Bacterial Gene Expression

ERIC Educational Resources Information Center

Sheng, Xiumei; Xu, Shungao; Lu, Renyun; Isaac, Dadzie; Zhang, Xueyi; Zhang, Haifang; Wang, Huifang; Qiao, Zheng; Huang, Xinxiang

2014-01-01

Scientific experiments are indispensable parts of Biochemistry and Molecular Biology. In this study, a comprehensive Biochemistry and Molecular Biology experiment about "Salmonella enterica" serovar Typhi Flagellar phase variation has been designed. It consisted of three parts, namely, inducement of bacterial Flagellar phase variation,…

Advancing Virtual Patient Simulations through Design Research and InterPLAY: Part I--Design and Development

ERIC Educational Resources Information Center

Hirumi, Atsusi; Kleinsmith, Andrea; Johnsen, Kyle; Kubovec, Stacey; Eakins, Michael; Bogert, Kenneth; Rivera-Gutierrez, Diego J.; Reyes, Ramsamooj Javier; Lok, Benjamin; Cendan, Juan

2016-01-01

Systematic reviews and meta-analyses of randomized controlled studies conclude that virtual patient simulations are consistently associated with higher learning outcomes compared to other educational methods. However, we cannot assume that students will learn from simply exposing students to the simulations. The instructional features that are…

Cost Effectiveness Analysis between Boarding and Day Secondary Students in Kenya

ERIC Educational Resources Information Center

Jagero, N.; Ayodo, T. M.; Agak, J. A.

2011-01-01

This paper examines the cost effectiveness of educating boarding and day secondary students in Kisumu district in Kenya. The research designs used in this study were descriptive survey and casual comparative designs. The population consisted of five head teachers, 140 form four teachers and 609 form four students. Saturated and systematic random…

Effect of Computer-Assisted Instruction on Secondary School Students' Achievement in Ecological Concepts

ERIC Educational Resources Information Center

Nkemdilim, Egbunonu Roseline; Okeke, Sam O. C.

2014-01-01

This study investigated the effects of computer-assisted instruction (CAI) on students' achievement in ecological concepts. Quasi-experimental design, specifically the pre-test post test non-equivalent control group design was adopted. The sample consisted of sixty-six (66) senior secondary year two (SS II) biology students, drawn from two…

Development of a fescue toxicosis model using a fescue seed extract

USDA-ARS?s Scientific Manuscript database

This study was designed to examine the efficacy of a fescue seed extract for inducing fescue toxicosis in cattle. Four growing Holstein steers (BW = 309±36kg) surgically fitted with ruminal cannulas were utilized in a four phase crossover design experiment. The basal diet consisted of endophyte fr...

Feasibility study of an Integrated Program for Aerospace vehicle Design (IPAD). Volume 5: Catalog of IPAD technical program elements

NASA Technical Reports Server (NTRS)

Gillette, W. B. (Editor); Southall, J. W. (Editor)

1973-01-01

The catalog is presented of technical program elements which are required to support the design activities for a subsonic and supersonic commercial transport. Information for each element consists of usage and storage information, ownership, status and an abstract describing the purpose of the element.

Demonstration-Based Training (DBT) in the Design of a Video Tutorial for Software Training

ERIC Educational Resources Information Center

van der Meij, Hans; van der Meij, Jan

2016-01-01

This study investigates the design and effectiveness of a video tutorial for software training. In accordance with demonstration-based training, the tutorial consisted of a series of task demonstrations, with instructional features added to enhance learning. An experiment is reported in which a demonstration-only control condition was compared…

Design and evaluation of high-volume fly ash (HVFA) concrete mixes, report B : bond behavior of mild reinforcing steel in HVFA concrete.

DOT National Transportation Integrated Search

2012-10-01

The main objective of this study was to determine the effect on bond performance : of high-volume fly ash (HVFA) concrete. The HVFA concrete test program consisted of : comparing the bond performance of two concrete mix designs with 70% cement : repl...

Seriacion: Un Procedimiento De Aprendizaje (Seriation: A Learning Procedure.)

ERIC Educational Resources Information Center

Mejia, Mercedes; And Others

The development and application of a learning procedure for the seriation structure of children in the oscilatory state are described. The procedure was based on the structural genetic theory of learning. A study consisting of design and verification stages was carried out in Cali, Colombia. In the design stage six seriation treatments involving…

Counselling Strategies for Curbing Examination Malpractices in Secondary Schools in Enugu State, Nigeria

ERIC Educational Resources Information Center

Egbo, Anthonia Chinonyelum

2015-01-01

This study investigated the Counselling strategies for curbing "Examination Malpractices" in Secondary Schools in Enugu State Nigeria. The researcher used three research questions. The Design used was a descriptive survey design. Sample consisted of 335 respondents comprising principals (N = 19), PTA secretaries (N = 19), teachers (N =…

Evaluating a Professional Development Framework to Empower Chemistry Teachers to Design Context-Based Education

ERIC Educational Resources Information Center

Stolk, Machiel Johan; Bulte, Astrid; De Jong, Onno; Pilot, Albert

2012-01-01

Even experienced chemistry teachers require professional development when they are encouraged to become actively engaged in the design of new context-based education. This study briefly describes the development of a framework consisting of goals, learning phases, strategies and instructional functions, and how the framework was translated into a…

A Study of Crowd Ability and its Influence on Crowdsourced Evaluation of Design Concepts

DTIC Science & Technology

2014-05-01

identifies the experts from the crowd, under the assumptions that ( 1 ) experts do exist and (2) only experts have consistent evaluations. These assumptions...for design evaluation tasks . Keywords: crowdsourcing, design evaluation, sparse evaluation ability, machine learning ∗Corresponding author. 1 ...intelligence” of a much larger crowd of people with diverse backgrounds [ 1 ]. Crowdsourced evaluation, or the delegation of an eval- uation task to a

Reliability-based structural optimization: A proposed analytical-experimental study

NASA Technical Reports Server (NTRS)

Stroud, W. Jefferson; Nikolaidis, Efstratios

1993-01-01

An analytical and experimental study for assessing the potential of reliability-based structural optimization is proposed and described. In the study, competing designs obtained by deterministic and reliability-based optimization are compared. The experimental portion of the study is practical because the structure selected is a modular, actively and passively controlled truss that consists of many identical members, and because the competing designs are compared in terms of their dynamic performance and are not destroyed if failure occurs. The analytical portion of this study is illustrated on a 10-bar truss example. In the illustrative example, it is shown that reliability-based optimization can yield a design that is superior to an alternative design obtained by deterministic optimization. These analytical results provide motivation for the proposed study, which is underway.

Designing a valid randomized pragmatic primary care implementation trial: the my own health report (MOHR) project.

PubMed

Krist, Alex H; Glenn, Beth A; Glasgow, Russell E; Balasubramanian, Bijal A; Chambers, David A; Fernandez, Maria E; Heurtin-Roberts, Suzanne; Kessler, Rodger; Ory, Marcia G; Phillips, Siobhan M; Ritzwoller, Debra P; Roby, Dylan H; Rodriguez, Hector P; Sabo, Roy T; Sheinfeld Gorin, Sherri N; Stange, Kurt C

2013-06-25

There is a pressing need for greater attention to patient-centered health behavior and psychosocial issues in primary care, and for practical tools, study designs and results of clinical and policy relevance. Our goal is to design a scientifically rigorous and valid pragmatic trial to test whether primary care practices can systematically implement the collection of patient-reported information and provide patients needed advice, goal setting, and counseling in response. This manuscript reports on the iterative design of the My Own Health Report (MOHR) study, a cluster randomized delayed intervention trial. Nine pairs of diverse primary care practices will be randomized to early or delayed intervention four months later. The intervention consists of fielding the MOHR assessment--addresses 10 domains of health behaviors and psychosocial issues--and subsequent provision of needed counseling and support for patients presenting for wellness or chronic care. As a pragmatic participatory trial, stakeholder groups including practice partners and patients have been engaged throughout the study design to account for local resources and characteristics. Participatory tasks include identifying MOHR assessment content, refining the study design, providing input on outcomes measures, and designing the implementation workflow. Study outcomes include the intervention reach (percent of patients offered and completing the MOHR assessment), effectiveness (patients reporting being asked about topics, setting change goals, and receiving assistance in early versus delayed intervention practices), contextual factors influencing outcomes, and intervention costs. The MOHR study shows how a participatory design can be used to promote the consistent collection and use of patient-reported health behavior and psychosocial assessments in a broad range of primary care settings. While pragmatic in nature, the study design will allow valid comparisons to answer the posed research question, and findings will be broadly generalizable to a range of primary care settings. Per the pragmatic explanatory continuum indicator summary (PRECIS) framework, the study design is substantially more pragmatic than other published trials. The methods and findings should be of interest to researchers, practitioners, and policy makers attempting to make healthcare more patient-centered and relevant. Clinicaltrials.gov: NCT01825746.

Binding the Electronic Book: Design Features for Bibliophiles

ERIC Educational Resources Information Center

Ruecker, Stan; Uszkalo, Kirsten C.

2007-01-01

This paper proposes a design for the electronic book based on discussions with frequent book readers. We adopted a conceptual framework for this project consisting of a spectrum of possible designs, with the conventional bound book at one difference pole, and the laptop computer at the other; the design activity then consisted of appropriately…

Drawing/Writing: A Brain Research-Based Writing Program Designed to Develop Descriptive, Analytical and Inferential Thinking Skills at the Elementary School Level

ERIC Educational Resources Information Center

Sheridan, Susan Rich

1990-01-01

The research and the study focus on the problem of dissociated learning. Why do students fail to connect with knowledge? The purposes of the study are: to summarize research pertaining to brain growth; to describe educational approaches and tactics consistent with this research; to test a brain research-based program designed to connect children…

The End-of-Life Experience in Long-Term Care: Five Themes Identified from Focus Groups with Residents, Family Members, and Staff

ERIC Educational Resources Information Center

Munn, Jean C.; Dobbs, Debra; Meier, Andrea; Williams, Christianna S.; Biola, Holly; Zimmerman, Sheryl

2008-01-01

Purpose: We designed this study to examine the end-of-life (EOL) experience in long-term care (LTC) based on input from key stakeholders. Design and Methods: The study consisted of 10 homogeneous focus groups drawn from a purposive sample of LTC residents (2 groups; total n = 11), family caregivers (2 groups; total n = 19), paraprofessional staff…

Horizontal alignment design consistency for rural two-lane highways.

DOT National Transportation Integrated Search

1995-01-01

The state of the practice in highway geometric design consistency was determined through a review of U.S. and foreign geometric design policy, practice, and research. Models, and a menu-driven microcomputer procedure for their use, were developed for...

Energy efficient engine: Low-pressure turbine subsonic cascade component development and integration program

NASA Technical Reports Server (NTRS)

Sharma, O. P.; Kopper, F. C.; Knudsen, L. K.; Yustinich, J. B.

1982-01-01

A subsonic cascade test program was conducted to provide technical data for optimizing the blade and vane airfoil designs for the Energy Efficient Engine Low-Pressure Turbine component. The program consisted of three parts. The first involved an evaluation of the low-chamber inlet guide vane. The second, was an evaluation of two candidate aerodynamic loading philosophies for the fourth blade root section. The third part consisted of an evaluation of three candidate airfoil geometries for the fourth blade mean section. The performance of each candidate airfoil was evaluated in a linear cascade configuration. The overall results of this study indicate that the aft-loaded airfoil designs resulted in lower losses which substantiated Pratt & Whitney Aircraft's design philosophy for the Energy Efficient Engine low-pressure turbine component.

Natural environment design criteria for the Space Station definition and preliminary design

NASA Astrophysics Data System (ADS)

Vaughan, W. W.; Green, C. E.

1985-03-01

The natural environment design criteria for the Space Station Program (SSP) definition and preliminary design are presented. Information on the atmospheric, dynamic and thermodynamic environments, meteoroids, radiation, magnetic fields, physical constants, etc. is provided with the intension of enabling all groups involved in the definition and preliminary design studies to proceed with a common and consistent set of natural environment criteria requirements. The space station program elements (SSPE) shall be designed with no operational sensitivity to natural environment conditions during assembly, checkout, stowage, launch, and orbital operations to the maximum degree practical.

Natural environment design criteria for the Space Station definition and preliminary design

NASA Technical Reports Server (NTRS)

Vaughan, W. W.; Green, C. E.

1985-01-01

The natural environment design criteria for the Space Station Program (SSP) definition and preliminary design are presented. Information on the atmospheric, dynamic and thermodynamic environments, meteoroids, radiation, magnetic fields, physical constants, etc. is provided with the intension of enabling all groups involved in the definition and preliminary design studies to proceed with a common and consistent set of natural environment criteria requirements. The space station program elements (SSPE) shall be designed with no operational sensitivity to natural environment conditions during assembly, checkout, stowage, launch, and orbital operations to the maximum degree practical.

Toxics in My Home? You Bet! Curriculum on Household Toxics for Grades 4-6.

ERIC Educational Resources Information Center

Purin, Gina; And Others

This curriculum consists of a one-week course of study designed to introduce students in grades 4-6 to (or increase their awareness of) toxic substances commonly found in the home. It includes an introduction/conceptual framework, four lessons, a unit evaluation, and appendices. Each lesson consists of a statement of purpose, objectives,…

Toxics in My Home? You Bet! Curriculum on Household Toxics for Grades 7-8.

ERIC Educational Resources Information Center

Purin, Gina; And Others

This curriculum consists of a one-week course of study designed to introduce students in grades 7-8 to (or increase their awareness of) toxic substances commonly found in the home. It includes an introduction/conceptual framework, four lessons, a unit test, and appendices. Each lesson consists of a statement of purpose, objectives,…

Toxics in My Home? You Bet! Curriculum on Household Toxics for Grades 9-12.

ERIC Educational Resources Information Center

Purin, Gina; And Others

This curriculum consists of a one-week course of study designed to introduce students in grades 9-12 to (or increase their awareness of) toxic substances commonly found in the home. It includes an introduction/conceptual framework, five lessons, a unit test, and appendices. Each lesson consists of a statement of purpose, objectives, list of…

The Effects of Automated Prompting and Self-Monitoring on Homework Completion for a Student with Attention Deficit Hyperactivity Disorder

ERIC Educational Resources Information Center

Blicha, Amy; Belfiore, Phillip J.

2013-01-01

This study examined the effects of an intervention consisting of automated prompting and self-monitoring on the level of independent homework task completion for an elementary-age student with attention deficit hyperactivity disorder (ADHD). Instituting a single subject, within series ABAB design, the results showed a consistent increase and…

SRB/SLEEC (Solid Rocket Booster/Shingle Lap Extendible Exit Cone) feasibility study, volume 2. Appendix A: Design study for a SLEEC actuation system

NASA Technical Reports Server (NTRS)

Thompson, D. S.

1986-01-01

The results are presented of a design feasibility study of a self-contained (powered) actuation system for a Shingle Lap Extendible Exit Cone (SLEEC) for Transportation System (STS). The evolution of the SLEEC actuation system design is reviewed, the final design concept is summarized, and the results of the detailed study of the final concept of the actuation system are treated. A conservative design using proven mechanical components was established as a major program priority. The final mechanical design has a very low development risk since the components, which consist of ballscrews, gearing, flexible shaft drives, and aircraft cables, have extensive aerospace applications and a history of proven reliability. The mathematical model studies have shown that little or no power is required to deploy the SLEEC actuation system because acceleration forces and internal pressure from the rocket plume provide the required energies. A speed control brake is incorporated in the design in order to control the rate of deployment.

Outcome-Dependent Sampling Design and Inference for Cox’s Proportional Hazards Model

PubMed Central

Yu, Jichang; Liu, Yanyan; Cai, Jianwen; Sandler, Dale P.; Zhou, Haibo

2016-01-01

We propose a cost-effective outcome-dependent sampling design for the failure time data and develop an efficient inference procedure for data collected with this design. To account for the biased sampling scheme, we derive estimators from a weighted partial likelihood estimating equation. The proposed estimators for regression parameters are shown to be consistent and asymptotically normally distributed. A criteria that can be used to optimally implement the ODS design in practice is proposed and studied. The small sample performance of the proposed method is evaluated by simulation studies. The proposed design and inference procedure is shown to be statistically more powerful than existing alternative designs with the same sample sizes. We illustrate the proposed method with an existing real data from the Cancer Incidence and Mortality of Uranium Miners Study. PMID:28090134

From SOPs to Reports to Evaluations: Learning and Memory ...

EPA Pesticide Factsheets

In an era of global trade and regulatory cooperation, consistent and scientifically based interpretation of developmental neurotoxicity (DNT) studies is essential. Because there is flexibility in the selection of test method(s), consistency can be especially challenging for learning and memory tests required by EPA and OECD DNT guidelines (chemicals and pesticides) and recommended for ICH prenatal/postnatal guidelines (pharmaceuticals). A well­ reasoned uniform approach is particularly important for variable endpoints and if non-standard tests are used. An understanding of the purpose behind the tests and expected outcomes is critical, and attention to elements of experimental design, conduct, and reporting can improve study design by the investigator as well as accuracy and consistency of interpretation by evaluators. This understanding also directs which information must be clearly described in study reports. While missing information may be available in standardized operating procedures (SOPs), if not clearly reflected in report submissions there may be questions and misunderstandings by evaluators which could impact risk assessments. A practical example will be presented to provide insights into important variables and reporting approaches. Cognitive functions most often tested in guidelines studies include associative, positional, sequential, and spatial learning and memory in weanling and adult animals. These complex behaviors tap different bra

V/STOL lift fan commercial short haul transports: Continuing conceptual design study

NASA Technical Reports Server (NTRS)

Zabinsky, J. M.; Minkler, W. F.; Bohn, J. G.; Derbyshire, T.; Middlebrooks, J. E.; Mcbarron, J. P.; Williams, B.; Miller, C. W.

1974-01-01

A design study of commercial V/STOL transport airplanes for a 1985 operational time period has been made. The baseline mission considered was 400 nmi at a cruise speed of M = 0.75 and a 100-passenger payload with VTOL. Variations from the baseline included mission distance, payload, cruise speed, and propulsion system failure philosophy. All designs used propulsion systems consisting of multiple gas generators driving remote tip turbine lift and lift/cruise fans. By considering the fan to be designed for operational reliability, significant simplication of the airplane systems and reduction in airplane size and cost can be achieved.

Research on temperature control and influence of the vacuum tubes with inserted tubes solar heater

NASA Astrophysics Data System (ADS)

Xiao, L. X.; He, Y. T.; Hua, J. Q.

2017-11-01

A novel snake-shape vacuum tube with inserted tubes solar collector is designed in this paper, the heat transfer characteristics of the collector are analyzed according to its structural characteristics, and the influence of different working temperature on thermal characteristics of the collector is studied. The solar water heater prototype consisting of 14 vacuum tubes with inserted tubes is prepared, and the hot water storage control subsystem is designed by hysteresis comparison algorithm. The heat characteristic of the prototype was experimentally studied under hot water output temperature of 40-45°C, 50-55°C and 60-65°C. The daily thermal efficiency was 64%, 50% and 46%, respectively. The experimental results are basically consistent with the theoretical analysis.

Design Study for the Asteroid Redirect Vehicle (ARV) Composite Primary Bulkhead

NASA Technical Reports Server (NTRS)

Cressman, Thomas O.; Paddock, David A.

2017-01-01

A design study was undertaken of a carbon fiber primary bulkhead for a large solar electric propulsion (SEP) spacecraft. The bulkhead design, supporting up to 16 t of xenon propellant, progressed from one consisting of many simple parts with many complex joints, to one consisting of a few complex parts with a few simple joints. The unique capabilities of composites led to a topology that transitioned loads from bending to in-plane tension and shear, with low part count. This significantly improved bulkhead manufacturability, cost, and mass. The stiffness-driven structure utilized high-modulus M55J fiber unidirectional prepregs. A full-scale engineering demonstration unit (EDU) of the concept was used to demonstrate manufacturability of the concept. Actual labor data was obtained, which could be extrapolated to a full bulkhead. The effort demonstrated the practicality of using high-modulus fiber (HMF) composites for unique shape topologies that minimize mass and cost. The lessons are applicable to primary and secondary aerospace structures that are stiffness driven.

The Woodlands Metro Center energy study. Case studies of project planning and design for energy conservation

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

1980-03-01

Appendix II of The Woodlands Metro Center Energy Study near Houston consists of the following: Metro Center Program, Conventional Plan Building Prototypes and Detail Parcel Analysis, Energy Plan Building Prototypes, and Energy Plan Detail Parcel Analysis.

Project SAVE: Skills, Attitudes, Values, Essential for Employment. Final Report, 1982-83.

ERIC Educational Resources Information Center

Chenard, Marcelle

The Skills, Attitudes, and Values for Employment (SAVE) project was designed to explore the needs of women in the workplace. An exploratory design was selected for the study with a target population consisting of 200 women working in companies in Morris County, New Jersey. From a self-administered questionnaire used to elicit information, the…

Quality Matters Rubric Potential for Enhancing Online Foreign Language Education

ERIC Educational Resources Information Center

Al Zumor, Abdul Wahed Q.

2015-01-01

Quality Matters Program is designed to certify the quality of online courses in colleges and universities across and beyond the U.S. The Quality Matters Rubric (QMR) consists of eight general standards and 41 specific standards which are used to evaluate and design online and blended courses. The purpose of this study is to highlight the QMR…

The Development of SCORM-Conformant Learning Content Based on the Learning Cycle Using Participatory Design

ERIC Educational Resources Information Center

Su, C. Y.; Chiu, C. H.; Wang, T. I.

2010-01-01

This study incorporates the 5E learning cycle strategy to design and develop Sharable Content Object Reference Model-conformant materials for elementary science education. The 5E learning cycle that supports the constructivist approach has been widely applied in science education. The strategy consists of five phases: engagement, exploration,…

Children's Perceptions of Illness and Health: An Analysis of Drawings

ERIC Educational Resources Information Center

Mouratidi, Paraskevi-Stavroula; Bonoti, Fotini; Leondari, Angeliki

2016-01-01

Objective: The purpose of this study was to explore possible age differences in children's perceptions of illness and health and to what extent these differ from adults' perceptions. Design: Cross-sectional design. Setting: Selected nursery and primary schools in Greece. Method: The sample consisted of 347 children aged 5-11 years and 114…

NASA cryogenic fluid management space experiment efforts, 1960-1990

NASA Technical Reports Server (NTRS)

Glover, Daniel

1991-01-01

A history of technological development for subcritical cryogenic fluid management (CFM) through space experiments is given for the period 1960 to 1990. Space experiments with liquid hydrogen were conducted in the early 1960's. Efforts since then have consisted of studies and designs of potential space experiments. A chronology of CFM space experiments and design efforts is included.

Sweet Grass Elementary School: A Study in Energy Conservation. Energy Conservation: School Design.

ERIC Educational Resources Information Center

Edmonton Public Schools (Alberta).

The results of building a new school in Edmonton (Alberta) in accordance with energy efficient principles are described in this report, the third and last in a series describing three projects utilizing different approaches to energy conservation. The Sweet Grass Elementary School project consisted in designing, building, and monitoring an energy…

NASA cryogenic fluid management space experiment efforts

NASA Technical Reports Server (NTRS)

Glover, Daniel

1991-01-01

A history of technological development for subcritical cryogenic fluid management (CFM) through space experiments is given for the period 1960 to 1990. Space experiments with liquid hydrogen were conducted in the early 1960s. Efforts since then have consisted of studies and designs of potential space experiments. A chronology of CFM space experiments and design efforts is included.

Towards More Precise Design Guidance: Specifying and Testing the Functions of Assigned Student Roles in Online Discussions

ERIC Educational Resources Information Center

Wise, Alyssa Friend; Saghafian, Marzieh; Padmanabhan, Poornima

2012-01-01

While assigning student roles is a popular technique in online discussions, roles and the responsibilities allocated to them have not been consistently assigned. This makes it difficult to compare implementations and generate principled guidance for role design. This study critically examined frequently assigned student roles and identified a set…

Writing Simple Sentences and Descriptive Paragraphs: Effects of an Intervention on Adolescents with Writing Difficulties

ERIC Educational Resources Information Center

Datchuk, Shawn M.

2016-01-01

The present study investigated the effects of a multicomponent intervention on the writing behavior of adolescents with writing difficulties. A single-case design consisting of a combination of multiple-probe design across participants and pre-post test was used. Four participants completed two intervention phases: (a) sentence instruction and…

Design of the Army Chargeback and Cost Accounting System. Study Recommendations Report (Final Design and Implementation Plan),

DTIC Science & Technology

1987-08-07

0MB, and Congress. Vance recommands that the marketing strategy consist of meetings to attend, presentations to give, input to request, briefings to...6.2.3.1.6 Blue Ribbon Panel. Vance recommends that as part of the marketing strategy , the Army convene a panel of senior corporate officials and

Office of Student Financial Aid Quality Improvement Program: Design and Implementation Plan.

ERIC Educational Resources Information Center

Advanced Technology, Inc., Reston, VA.

The purpose and direction of the Office of Student Financial Aid (OSFA) quality improvement program are described. The background and context for the Pell Grant quality control (QC) design study and the meaning of QC are reviewed. The general approach to quality improvement consists of the following elements: a strategic approach that enables OSFA…

Assessing Impacts of Locally Designed Environmental Education Projects on Students' Environmental Attitudes, Awareness, and Intention to Act

ERIC Educational Resources Information Center

Bergman, Brenda Gail

2016-01-01

This study investigates whether consistent effects on students' environmental attitudes, awareness, and behavioral intentions could be discerned in an initiative that supports environmental education (EE) designed at the classroom level. Students of grades four, five, and seven participated in an assessment at the beginning and end of the school…

Using an Iterative Mixed-Methods Research Design to Investigate Schools Facing Exceptionally Challenging Circumstances within Trinidad and Tobago

ERIC Educational Resources Information Center

De Lisle, Jerome; Seunarinesingh, Krishna; Mohammed, Rhoda; Lee-Piggott, Rinnelle

2017-01-01

In this study, methodology and theory were linked to explicate the nature of education practice within schools facing exceptionally challenging circumstances (SFECC) in Trinidad and Tobago. The research design was an iterative quan>QUAL-quan>qual multi-method research programme, consisting of 3 independent projects linked together by overall…

Linac design for the European spallation source

DOE Office of Scientific and Technical Information (OSTI.GOV)

Klein, H.

1995-10-01

A study group has started to develop a conceptual design for a European Spallation Source (ESS). This pulsed 5 MW source presently consists of a 1.334 GeV linac and two compressor rings. In the following mainly the high intensity linac part will be discussed, which has some features of interest for accelerators for transmutation of radioactive waste too.

Preliminary design study of astronomical detector cooling system

NASA Technical Reports Server (NTRS)

Norman, R. H.

1976-01-01

The preliminary design of an astronomical detector cooling system for possible use in the NASA C-141 Airborne Infrared Observatory is presented. The system consists of the following elements: supercritical helium tank, Joule-Thomson supply gas conditioner, Joule-Thomson expander (JTX), optical cavity dewar, optical cavity temperature controller, adjustable J-T discharge gas pressure controller, and vacuum pump.

Consistency between cross-sectional and longitudinal SNP: blood lipid associations.

PubMed

Costanza, Michael C; Beer-Borst, Sigrid; James, Richard W; Gaspoz, Jean-Michel; Morabia, Alfredo

2012-02-01

Various studies have linked different genetic single nucleotide polymorphisms (SNPs) to different blood lipids (BL), but whether these "connections" were identified using cross-sectional or longitudinal (i.e., changes over time) designs has received little attention. Cross-sectional and longitudinal assessments of BL [total, high-, low-density lipoprotein cholesterol (TC, HDL, LDL), triglycerides (TG)] and non-genetic factors (body mass index, smoking, alcohol intake) were measured for 2,002 Geneva, Switzerland, adults during 1999-2008 (two measurements, median 6 years apart), and 20 SNPs in 13 BL metabolism-related genes. Fixed and mixed effects repeated measures linear regression models, respectively, were employed to identify cross-sectional and longitudinal SNP:BL associations among the 1,516 (76%) study participants who reported not being treated for hypercholesterolemia at either measurement time. One-third more (12 vs. 9) longitudinal than cross-sectional associations were found [Bonferroni-adjusted two-tailed p < 0.00125 (=0.05/2)/20) for each of the four ensembles of 20 SNP:individual BL associations tested under the two study designs]. There was moderate consistency between the cross-sectional and longitudinal findings, with eight SNP:BL associations consistently identified across both study designs: [APOE.2 and APOE.4 (rs7412 and rs429358)]:TC; HL/LIPC (rs2070895):HDL; [APOB (rs1367117), APOE.2 and APOE.4 (rs7412 and rs429358)]:LDL; [APOA5 (rs2072560) and APOC III (rs5128)]:TG. The results suggest that cross-sectional studies, which include most genome-wide association studies (GWAS), can assess the large majority of SNP:BL associations. In the present analysis, which was much less powered than a GWAS, the cross-sectional study was around 2/3 (67%) as efficient as the longitudinal study.

An investigation of the effects of relevant samples and a comparison of verification versus discovery based lab design

NASA Astrophysics Data System (ADS)

Rieben, James C., Jr.

This study focuses on the effects of relevance and lab design on student learning within the chemistry laboratory environment. A general chemistry conductivity of solutions experiment and an upper level organic chemistry cellulose regeneration experiment were employed. In the conductivity experiment, the two main variables studied were the effect of relevant (or "real world") samples on student learning and a verification-based lab design versus a discovery-based lab design. With the cellulose regeneration experiment, the effect of a discovery-based lab design vs. a verification-based lab design was the sole focus. Evaluation surveys consisting of six questions were used at three different times to assess student knowledge of experimental concepts. In the general chemistry laboratory portion of this study, four experimental variants were employed to investigate the effect of relevance and lab design on student learning. These variants consisted of a traditional (or verification) lab design, a traditional lab design using "real world" samples, a new lab design employing real world samples/situations using unknown samples, and the new lab design using real world samples/situations that were known to the student. Data used in this analysis were collected during the Fall 08, Winter 09, and Fall 09 terms. For the second part of this study a cellulose regeneration experiment was employed to investigate the effects of lab design. A demonstration creating regenerated cellulose "rayon" was modified and converted to an efficient and low-waste experiment. In the first variant students tested their products and verified a list of physical properties. In the second variant, students filled in a blank physical property chart with their own experimental results for the physical properties. Results from the conductivity experiment show significant student learning of the effects of concentration on conductivity and how to use conductivity to differentiate solution types with the use of real world samples. In the organic chemistry experiment, results suggest that the discovery-based design improved student retention of the chain length differentiation by physical properties relative to the verification-based design.

Fundamental arthroscopic skill differentiation with virtual reality simulation.

PubMed

Rose, Kelsey; Pedowitz, Robert

2015-02-01

The purpose of this study was to investigate the use and validity of virtual reality modules as part of the educational approach to mastering arthroscopy in a safe environment by assessing the ability to distinguish between experience levels. Additionally, the study aimed to evaluate whether experts have greater ambidexterity than do novices. Three virtual reality modules (Swemac/Augmented Reality Systems, Linkoping, Sweden) were created to test fundamental arthroscopic skills. Thirty participants-10 experts consisting of faculty, 10 intermediate participants consisting of orthopaedic residents, and 10 novices consisting of medical students-performed each exercise. Steady and Telescope was designed to train centering and image stability. Steady and Probe was designed to train basic triangulation. Track and Moving Target was designed to train coordinated motions of arthroscope and probe. Metrics reflecting speed, accuracy, and efficiency of motion were used to measure construct validity. Steady and Probe and Track a Moving Target both exhibited construct validity, with better performance by experts and intermediate participants than by novices (P < .05), whereas Steady and Telescope did not show validity. There was an overall trend toward better ambidexterity as a function of greater surgical experience, with experts consistently more proficient than novices throughout all 3 modules. This study represents a new way to assess basic arthroscopy skills using virtual reality modules developed through task deconstruction. Participants with the most arthroscopic experience performed better and were more consistent than novices on all 3 virtual reality modules. Greater arthroscopic experience correlates with more symmetry of ambidextrous performance. However, further adjustment of the modules may better simulate fundamental arthroscopic skills and discriminate between experience levels. Arthroscopy training is a critical element of orthopaedic surgery resident training. Developing techniques to safely and effectively train these skills is critical for patient safety and resident education. Copyright © 2015 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.

Consistency in color parameters of a commonly used shade guide.

PubMed

Tashkandi, Esam

2010-01-01

The use of shade guides to assess the color of natural teeth subjectively remains one of the most common means for dental shade assessment. Any variation in the color parameters of the different shade guides may lead to significant clinical implications. Particularly, since the communication between the clinic and the dental laboratory is based on using the shade guide designation. The purpose of this study was to investigate the consistency of the L∗a∗b∗ color parameters of a sample of a commonly used shade guide. The color parameters of a total of 100 VITAPAN Classical Vacuum shade guide (VITA Zahnfabrik, Bad Säckingen, Germany(were measured using a X-Rite ColorEye 7000A Spectrophotometer (Grand Rapids, Michigan, USA). Each shade guide consists of 16 tabs with different designations. Each shade tab was measured five times and the average values were calculated. The ΔE between the average L∗a∗b∗ value for each shade tab and the average of the 100 shade tabs of the same designation was calculated. Using the Student t-test analysis, no significant differences were found among the measured sample. There is a high consistency level in terms of color parameters of the measured VITAPAN Classical Vacuum shade guide sample tested.

The use of CORE model by metacognitive skill approach in developing characters junior high school students

NASA Astrophysics Data System (ADS)

Fisher, Dahlia; Yaniawati, Poppy; Kusumah, Yaya Sukjaya

2017-08-01

This study aims to analyze the character of students who obtain CORE learning model using metacognitive approach. The method in this study is qualitative research and quantitative research design (Mixed Method Design) with concurrent embedded strategy. The research was conducted on two groups: an experimental group and the control group. An experimental group consists of students who had CORE model learning using metacognitive approach while the control group consists of students taught by conventional learning. The study was conducted the object this research is the seventh grader students in one the public junior high schools in Bandung. Based on this research, it is known that the characters of the students in the CORE model learning through metacognitive approach is: honest, hard work, curious, conscientious, creative and communicative. Overall it can be concluded that CORE model learning is good for developing characters of a junior high school student.

Structural cost optimization of photovoltaic central power station modules and support structure

NASA Technical Reports Server (NTRS)

Sutton, P. D.; Stolte, W. J.; Marsh, R. O.

1979-01-01

The results of a comprehensive study of photovoltaic module structural support concepts for photovoltaic central power stations and their associated costs are presented. The objective of the study has been the identification of structural cost drivers. Parametric structural design and cost analyses of complete array systems consisting of modules, primary support structures, and foundations were performed. Area related module cost was found to be constant with design, size, and loading. A curved glass module concept was evaluated and found to have the potential to significantly reduce panel structural costs. Conclusions of the study are: array costs do not vary greatly among the designs evaluated; panel and array costs are strongly dependent on design loading; and the best support configuration is load dependent

Emergency Medical Care. A Manual for the Paramedic in the Field--Workbook.

ERIC Educational Resources Information Center

National Highway Traffic Safety Administration (DOT), Washington, DC.

This workbook is designed to accompany the text of the same name and to serve as an aid to both learning and review during the course of study. The workbook consists of 15 module self-tests and vocabulary lists that follow the modules of the text. Tests consist of objective questions (multiple choice, fill-in-the-blank, short answers, and…

A comparative study of two shovel designs.

PubMed

Degani, A; Asfour, S S; Waly, S M; Koshy, J G

1993-10-01

In the present study a modified shovel design with two perpendicular shafts is presented. This modified, two-shaft shovel was compared with a regular shovel. The modified shovel was evaluated and tested in a controlled laboratory environment using surface electromyography recorded from the lumbar paraspinal muscles. The new shovel design was also tested in a field study using ratings of perceived exertion. The results indicate that there was a significant reduction in EMG values of the lumbar paraspinal muscles and a consistent reduction in perceived exertion ratings while the modified shovel was being used for removing dirt in digging trenches up to 90 cm in depth.

Preliminary design of flight hardware for two-phase fluid research

NASA Technical Reports Server (NTRS)

Hustvedt, D. C.; Oonk, R. L.

1982-01-01

This study defined the preliminary designs of flight software for the Space Shuttle Orbiter for three two-phase fluid research experiments: (1) liquid reorientation - to study the motion of liquid in tanks subjected to small accelerations; (2) pool boiling - to study low-gravity boiling from horizontal cylinders; and (3) flow boiling - to study low-gravity forced flow boiling heat transfer and flow phenomena in a heated horizontal tube. The study consisted of eight major tasks: reassessment of the existing experiment designs, assessment of the Spacelab facility approach, assessment of the individual carry-on approach, selection of the preferred approach, preliminary design of flight hardware, safety analysis, preparation of a development plan, estimates of detailed design, fabrication and ground testing costs. The most cost effective design approach for the experiments is individual carry-ons in the Orbiter middeck. The experiments were designed to fit into one or two middeck lockers. Development schedules for the detailed design, fabrication and ground testing ranged from 15 1/2 to 18 months. Minimum costs (in 1981 dollars) ranged from $463K for the liquid reorientation experiment to $998K for the pool boiling experiment.

Space Biology Initiative. Trade Studies, volume 2

NASA Technical Reports Server (NTRS)

1989-01-01

The six studies which are the subjects of this report are entitled: Design Modularity and Commonality; Modification of Existing Hardware (COTS) vs. New Hardware Build Cost Analysis; Automation Cost vs. Crew Utilization; Hardware Miniaturization versus Cost; Space Station Freedom/Spacelab Modules Compatibility vs. Cost; and Prototype Utilization in the Development of Space Hardware. The product of these six studies was intended to provide a knowledge base and methodology that enables equipment produced for the Space Biology Initiative program to meet specific design and functional requirements in the most efficient and cost effective form consistent with overall mission integration parameters. Each study promulgates rules of thumb, formulas, and matrices that serves as a handbook for the use and guidance of designers and engineers in design, development, and procurement of Space Biology Initiative (SBI) hardware and software.

Space Biology Initiative. Trade Studies, volume 1

NASA Technical Reports Server (NTRS)

1989-01-01

The six studies which are addressed are entitled: Design Modularity and Commonality; Modification of Existing Hardware (COTS) vs. New Hardware Build Cost Analysis; Automation Cost vs. Crew Utilization; Hardware Miniaturization versus Cost; Space Station Freedom/Spacelab Modules Compatibility vs. Cost; and Prototype Utilization in the Development of Space Hardware. The product of these six studies was intended to provide a knowledge base and methodology that enables equipment produced for the Space Biology Initiative program to meet specific design and functional requirements in the most efficient and cost effective form consistent with overall mission integration parameters. Each study promulgates rules of thumb, formulas, and matrices that serves has a handbook for the use and guidance of designers and engineers in design, development, and procurement of Space Biology Initiative (SBI) hardware and software.

The Potential of Dyslexic Individuals in Communication Design Education

PubMed Central

Çorlu, Muzaffer; Özcan, O&gcaron;uzhan; Korkmazlar, Ümran

2007-01-01

If dyslexic individuals have the ability to express themselves in different ways, particularly in the field of modern graphic design, would they be a favoured group in creating the extraordinary and outstanding ideas that are required in communication design? The study group consisted of 20 primary school dyslexics between ages of 7–12 and 20 non-dyslexics serving as a control group. A jury with four specialists evaluated the drawings gathered from the 40 participants. Even though we might not say surely that the dyslexics are the best possible candidates for communication design education, based on the statistical results we have concluded that they should be among the potential candidates for both general communication design education and for more specific minor study areas such as icon design. PMID:18430979

Brayton heat exchanger unit development program (alternate design)

NASA Technical Reports Server (NTRS)

Duncan, J. D.; Gibson, J. C.; Graves, R. F.; Morse, C. J.; Richard, C. E.

1973-01-01

A Brayton Heat Exchanger Unit Alternate Design (BHXU-Alternate) consisting of a recuperator, a heat sink heat exchanger, and a gas ducting system, was designed and fabricated. The design was formulated to provide a high performance unit suitable for use in a long-life Brayton-cycle powerplant. Emphasis was on double containment against external leakage and leakage of the organic coolant into the gas stream. A parametric analysis and design study was performed to establish the optimum component configurations to achieve low weight and size and high reliability, while meeting the requirements of high effectiveness and low pressure drop. Layout studies and detailed mechanical and structural design were performed to obtain a flight-type packaging arrangement, including the close-coupled integration of the BHXU-Alternate with the Brayton Rotating Unit (BRU).

Feasibility of a Trial on Improvisational Music Therapy for Children with Autism Spectrum Disorder.

PubMed

Geretsegger, Monika; Holck, Ulla; Bieleninik, Łucja; Gold, Christian

2016-01-01

To conduct generalizable, rigorously designed, adequately powered trials investigating music therapy and other complex interventions, it is essential that study procedures are feasible and acceptable for participants. To date, only limited evidence on feasibility of trial designs and strategies to facilitate study implementation is available in the music therapy literature. Using data from a subsample of a multi-center RCT on improvisational music therapy (IMT) for autism spectrum disorder (ASD), this study aims to evaluate feasibility of study procedures, evaluate safety, document concomitant treatment, and report consistency of individuals' trends over time in chosen outcome measures. Children with ASD aged between 4 years, 0 months, and 6 years, 11 months, were randomly assigned to one of three conditions: one (low intensity) vs. three weekly IMT sessions (high intensity) for five months vs. standard care. Feasibility was evaluated by examining recruitment, implementation of study conditions, assessment procedures, blinding, and retention; we also evaluated safety, concomitant treatment, and consistency of changes in standardized scales completed by blinded assessors and parents before and 5 months after randomization. Within this subsample (n = 15), recruitment rates, session attendance in the high-intensity condition, and consistency between outcome measures were lower than expected. Session attendance in the low-intensity and control conditions, treatment fidelity, measurement completion, blinding, retention, and safety met a priori thresholds for feasibility. By discussing strategies to improve recruitment and to minimize potential burden on study participants, referrers, and researchers, this study helps build knowledge about designing and implementing trials successfully. © the American Music Therapy Association 2016. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Brayton heat exchange unit development program

NASA Technical Reports Server (NTRS)

Morse, C. J.; Richard, C. E.; Duncan, J. D.

1971-01-01

A Brayton Heat Exchanger Unit (BHXU), consisting of a recuperator, a heat sink heat exchanger and a gas ducting system, was designed, fabricated, and tested. The design was formulated to provide a high performance unit suitable for use in a long-life Brayton-cycle powerplant. A parametric analysis and design study was performed to establish the optimum component configurations to achieve low weight and size and high reliability, while meeting the requirements of high effectiveness and low pressure drop. Layout studies and detailed mechanical and structural design were performed to obtain a flight-type packaging arrangement. Evaluation testing was conducted from which it is estimated that near-design performance can be expected with the use of He-Xe as the working fluid.

The community health clinics as a learning context for student nurses.

PubMed

Makupu, M B; Botes, A

2000-09-01

The purpose of the research study was to describe guidelines to improve the community health clinics as a learning context conductive to learning. The objectives of the study commenced by getting the perception of student nurses from a nursing college in Gauteng; community sisters from ten community health clinics in the Southern Metropolitan Local Council and college tutors from a college in Gauteng. The research design and method used, consisting of a qualitative, exploratory, descriptive and contextual approach and the design was divided into two phases. Phase one consisted of a field/empirical study and phase two of conceptualization. In all the samples follow-up focus group interviews were conducted to confirm the findings. To ensure trustworthiness, Lincoln and Guba's model (1985) was implemented and data analysis was according to Tesch's model (1990 in Creswell 1994:155) based on a qualitative approach. The conceptual framework discussed, indicating a body of knowledge, was based on the study and empirical findings from phase one to give clear meaning and understanding regarding the research study.

A predictive Bayesian approach to the design and analysis of bridging studies.

PubMed

Gould, A Lawrence; Jin, Tian; Zhang, Li Xin; Wang, William W B

2012-09-01

Pharmaceutical product development culminates in confirmatory trials whose evidence for the product's efficacy and safety supports regulatory approval for marketing. Regulatory agencies in countries whose patients were not included in the confirmatory trials often require confirmation of efficacy and safety in their patient populations, which may be accomplished by carrying out bridging studies to establish consistency for local patients of the effects demonstrated by the original trials. This article describes and illustrates an approach for designing and analyzing bridging studies that fully incorporates the information provided by the original trials. The approach determines probability contours or regions of joint predictive intervals for treatment effect and response variability, or endpoints of treatment effect confidence intervals, that are functions of the findings from the original trials, the sample sizes for the bridging studies, and possible deviations from complete consistency with the original trials. The bridging studies are judged consistent with the original trials if their findings fall within the probability contours or regions. Regulatory considerations determine the region definitions and appropriate probability levels. Producer and consumer risks provide a way to assess alternative region and probability choices. [Supplemental materials are available for this article. Go to the Publisher's online edition of the Journal of Biopharmaceutical Statistics for the following free supplemental resource: Appendix 2: R code for Calculations.].

On Consistency Test Method of Expert Opinion in Ecological Security Assessment

PubMed Central

Wang, Lihong

2017-01-01

To reflect the initiative design and initiative of human security management and safety warning, ecological safety assessment is of great value. In the comprehensive evaluation of regional ecological security with the participation of experts, the expert’s individual judgment level, ability and the consistency of the expert’s overall opinion will have a very important influence on the evaluation result. This paper studies the consistency measure and consensus measure based on the multiplicative and additive consistency property of fuzzy preference relation (FPR). We firstly propose the optimization methods to obtain the optimal multiplicative consistent and additively consistent FPRs of individual and group judgments, respectively. Then, we put forward a consistency measure by computing the distance between the original individual judgment and the optimal individual estimation, along with a consensus measure by computing the distance between the original collective judgment and the optimal collective estimation. In the end, we make a case study on ecological security for five cities. Result shows that the optimal FPRs are helpful in measuring the consistency degree of individual judgment and the consensus degree of collective judgment. PMID:28869570

On Consistency Test Method of Expert Opinion in Ecological Security Assessment.

PubMed

Gong, Zaiwu; Wang, Lihong

2017-09-04

To reflect the initiative design and initiative of human security management and safety warning, ecological safety assessment is of great value. In the comprehensive evaluation of regional ecological security with the participation of experts, the expert's individual judgment level, ability and the consistency of the expert's overall opinion will have a very important influence on the evaluation result. This paper studies the consistency measure and consensus measure based on the multiplicative and additive consistency property of fuzzy preference relation (FPR). We firstly propose the optimization methods to obtain the optimal multiplicative consistent and additively consistent FPRs of individual and group judgments, respectively. Then, we put forward a consistency measure by computing the distance between the original individual judgment and the optimal individual estimation, along with a consensus measure by computing the distance between the original collective judgment and the optimal collective estimation. In the end, we make a case study on ecological security for five cities. Result shows that the optimal FPRs are helpful in measuring the consistency degree of individual judgment and the consensus degree of collective judgment.

An Evaluative Case Study on Professional Competency of Preservice Information Technology Teachers

ERIC Educational Resources Information Center

Kabakci Yurdakul, Isil

2011-01-01

The purpose of this study is to evaluate preservice Information Technology (IT) teachers' professional competency in the teaching process. The study was designed on the basis of evaluative case study. The participants of the study consisted of seven preservice IT teachers attending the department of Computer Education and Instructional…

Design and test of a 100 ampere-hour nickel cadmium battery module

NASA Technical Reports Server (NTRS)

Gaston, S.; Wertheim, M.; Burgess, F. S.; Lehrfeld, D.; Winegard, A.

1973-01-01

A feasibility study was conducted on the design and construction of a flight-worthy replaceable battery module consisting of four 100 A.H. nickel-cadmium rechargeable cells for large manned space vehicles. The module is planned to weigh less than 43 pounds and be fully maintainable in a zero-g environment by one man without use of special tools. An active environmental control system was designed for the temperature control of the module.

Design of a cost-effective laser spot tracker

NASA Astrophysics Data System (ADS)

Artan, Göktuǧ Gencehan; Sari, Hüseyin

2017-05-01

One of the most important aspects of guided systems is detection. The most convenient detection in the sense of precision can be achieved with a laser spot tracker. This study deals with a military grade, high performance and cost-effective laser spot tracker for a guided system. The aim is to develop a high field of view system that will detect a laser spot from a distance of 3 kilometers in which the target is designated from 3 kilometers with a laser. The study basically consists of the system design, modeling, producing and the conducting performance tests of the whole system.

Obesity and Cancer Risk

MedlinePlus

... cancer risk. Despite the limitations of the study designs, there is consistent evidence that higher amounts of ... the National Cancer Institute.” Please note that blog posts that are written by individuals from outside the ...

Ultrafine ambient particulate matter enhances cardiac ischemia and reperfusion injury

EPA Science Inventory

Epidemiological studies have demonstrated a consistent link between exposure to ambient particulate air pollutant (PM) and the incidence of cardiovascular morbidity and mortality. The present study was designed to evaluate the cardiac effects of ambient PM. Mice were exposed to 1...

Design of capability measurement instruments pedagogic content knowledge (PCK) for prospective mathematics teachers

NASA Astrophysics Data System (ADS)

Aminah, N.; Wahyuni, I.

2018-05-01

The purpose of this study is to find out how the process of designing a tool of measurement Pedagogical Content Knowledge (PCK) capabilities, especially for prospective mathematics teachers are valid and practical. The design study of this measurement appliance uses modified Plomp development step, which consists of (1) initial assessment stage, (2) design stage at this stage, the researcher designs the measuring grille of PCK capability, (3) realization stage that is making measurement tool ability of PCK, (4) test phase, evaluation, and revision that is testing validation of measurement tools conducted by experts. Based on the results obtained that the design of PCK capability measurement tool is valid as indicated by the assessment of expert validator, and the design of PCK capability measurement tool, shown based on the assessment of teachers and lecturers as users of states strongly agree the design of PCK measurement tools can be used.

Environmental and Water Quality Operational Studies. Environmental Guidelines for Dike Fields.

DTIC Science & Technology

1984-09-01

public release; distribution unlimited. I. DISTRIBUTION STATEMENT (of the abstract entered In Block 20, If different from Report) IS. SUPPLEMENTARY NOTES...necessary and identify by block number) Aquatic biology--Environmental aspects. (LC) Dikes (Engineering)--Design and construction--Environmental...w ad Idenwify by block number) ’The environmental guidelines for dike fields-contained within this report consist of environmental objectives, design

The Effect of Analogy-Based Teaching on Students' Achievement and Students' Views about Analogies

ERIC Educational Resources Information Center

Genc, Murat

2013-01-01

The purpose of this study is to determine the effect of the analogy-based teaching on students' achievement and students' views about analogies. In this research, Solomon group design which is one of the experimental designs, was implemented. The sample of the research consists of 108 students in four 6th grade classes in Turkey. The achievement…

Experimental Effects of Word Generation on Vocabulary, Academic Language, and Perspective Taking in High Poverty Middle Schools

ERIC Educational Resources Information Center

Jones, Stephanie M.; Kim, James; LaRusso, Maria; Kim, Ha Yeon; Selman, Robert; Uccelli, Paola; Barnes, Sophie; Donovan, Suzanne; Snow, Catherine

2016-01-01

Word Generation (WG) is a research-based vocabulary program for middle school students designed to teach words through language arts, math, science, and social studies classes. The program consists of weekly units that introduce 5 high-utility target words through brief passages designed to spark active examination and discussion of contemporary…

Design of the Detector II: A CMOS Gate Array for the Study of Concurrent Error Detection Techniques.

DTIC Science & Technology

1987-07-01

detection schemes and temporary failures. The circuit consists- or of six different adders with concurrent error detection schemes . The error detection... schemes are - simple duplication, duplication with functional dual implementation, duplication with different &I [] .6implementations, two-rail encoding...THE SYSTEM. .. .... ...... ...... ...... 5 7. DESIGN OF CED SCHEMES .. ... ...... ...... ........ 7 7.1 Simple Duplication

The Design and Use of Decision Support Systems by Academic Departments. AIR 1987 Annual Forum Paper.

ERIC Educational Resources Information Center

Johnson, F. Craig

The design and use of a departmental decision support system at Florida State University are described from the perspective of a department head. The decisions selected for study are ones of adequacy, equitability, quality, efficiency, and consistency. The complexity of the decision is related to the complexity of the support system. The major…

An Integrative Framework for Studying, Designing and Conceptualising Interactivity in Children's Digital Books

ERIC Educational Resources Information Center

Kucirkova, Natalia

2017-01-01

In the past five years, there have been significant changes concerning the material and design properties of digital books, with an impact on children's enjoyment and learning from reading on screen. Despite the rapid advances in technology, research on children's digital books is disjointed. This is because of no consistent approach to the study…

Understanding the Epistemological Development of Substance Abusing College Students: A Construct Exploration Study

ERIC Educational Resources Information Center

Miller, Lisa A.

2009-01-01

The purpose of this study was to delve into the epistemological constructs of substance abusing college students and explore whether consistencies with Baxter Magolda's (1992) epistemic constructs were indicated. The study utilized a qualitative, narrative inquiry research design framed by Baxter Magolda's interview outline. Interviews were…

L2 Learners' Informal Online Interactions in Social Network Communities

ERIC Educational Resources Information Center

Malerba, Maria-Luisa

2012-01-01

This paper reports on a study on the use of social network sites (SNSs) designed for L2 learning, such as "Livemocha" and "Busuu", where learners autonomously seek opportunities for authentic interaction in spontaneous ways. The study consists in a longitudinal multiple case study approach to investigate learners' informal…

Effects of Metacognitive Guidance on Critical Thinking Disposition

ERIC Educational Resources Information Center

Akyüz, Halil Ibrahim; Samsa Yetik, Serap; Keser, Hafize

2015-01-01

The present study investigated the effect of metacognitive guidance in an online learning environment on the students' critical thinking competency. The research was carried out using experimental design with pretest-posttest control groups. The research group of the study consisted of 60 students studying at Computer and Educational Teaching…

Development of an Easy-to-Use Tool for the Assessment of Emergency Department Physical Design.

PubMed

Majidi, Alireza; Tabatabaey, Ali; Motamed, Hassan; Motamedi, Maryam; Forouzanfar, Mohammad Mehdi

2014-01-01

Physical design of the emergency department (ED) has an important effect on its role and function. To date, no guidelines have been introduced to set the standards for the construction of EDs in Iran. In this study, we aim to devise an easy-to-use tool based on the available literature and expert opinion for the quick and effective assessment of EDs in regards to their physical design. For this purpose, based on current literature on emergency design, a comprehensive checklist was developed. Then, this checklist was analyzed by a panel consisting of heads of three major EDs and contradicting items were decided. 178 crude items were derived from available literature. The Items were categorized in to three major domains of Physical space, Equipment, and Accessibility. The final checklist approved by the panel consisted of 163 items categorized into six domains. Each item was phrased as a "Yes or No" question for ease of analysis, meaning that the criterion is either met or not.

Neutrality and evolvability of designed protein sequences

NASA Astrophysics Data System (ADS)

Bhattacherjee, Arnab; Biswas, Parbati

2010-07-01

The effect of foldability on protein’s evolvability is analyzed by a two-prong approach consisting of a self-consistent mean-field theory and Monte Carlo simulations. Theory and simulation models representing protein sequences with binary patterning of amino acid residues compatible with a particular foldability criteria are used. This generalized foldability criterion is derived using the high temperature cumulant expansion approximating the free energy of folding. The effect of cumulative point mutations on these designed proteins is studied under neutral condition. The robustness, protein’s ability to tolerate random point mutations is determined with a selective pressure of stability (ΔΔG) for the theory designed sequences, which are found to be more robust than that of Monte Carlo and mean-field-biased Monte Carlo generated sequences. The results show that this foldability criterion selects viable protein sequences more effectively compared to the Monte Carlo method, which has a marked effect on how the selective pressure shapes the evolutionary sequence space. These observations may impact de novo sequence design and its applications in protein engineering.

Technical and Economic Assessment of Span-Loaded Cargo Aircraft Concepts

NASA Technical Reports Server (NTRS)

1976-01-01

The benefits are assessed of span distributed loading concepts as applied to future commercial air cargo operations. A two phased program is used to perform this assessment. The first phase consists of selected parametric studies to define significant configuration, performance, and economic trends. The second phase consists of more detailed engineering design, analysis, and economic evaluations to define the technical and economic feasibility of a selected spanloader design. A conventional all-cargo aircraft of comparable technology and size is used as a comparator system. The technical feasibility is demonstrated of the spanloader concept with no new major technology efforts required to implement the system. However, certain high pay-off technologies such as winglets, airfoil design, and advanced structural materials and manufacturing techniques need refinement and definition prior to application. In addition, further structural design analysis could establish the techniques and criteria necessary to fully capitalize upon the high degree of structural commonality and simplicity inherent in the spanloader concept.

Impact of palm olein in infant formulas on stool consistency and frequency: a meta-analysis of randomized clinical trials

PubMed Central

Lasekan, John B.; Hustead, Deborah S.; Masor, Marc; Murray, Robert

2017-01-01

ABSTRACT Background: Meta-analysis studies have documented that palm olein (PALM) predominant formulas reduce calcium and fat absorption, and bone mineralization in infants, but none have been documented for stool consistency and frequency. Objective: The study objective was to conduct a meta-analysis of published randomized clinical trials (RCTs) on the effect of PALM-based formulas on stool consistency and frequency in infants. Design: A literature search was conducted in BIOSIS Previews®, Embase®, Embase® Alert, MEDLINE® and Cochrane databases. PALM-based RCTs with available stool outcomes were selected and meta-analyzed. Mean rank stool consistency (MRSC, primary outcome) and stool frequency (secondary outcome) were compared between infants fed PALM-based and PALM-free formulas (NoPALM), using random effects model. Results: Nine out of identified16 studies were meta-analyzed. The mean MRSC (scale of 1 = watery to 5 = hard) in the NoPALM-fed infants was lower (softer stools) compared to the PALM-fed infants (mean difference ‒0.355, 95% Confidence Interval [CI] of ‒0.472 to ‒0.239, p < 0.001). Difference for stool frequency was not significant (p = 0.613). Conclusion: Meta-analysis of RCTs indicated that NoPALM-fed infants have significantly softer stools but similar stool frequencies versus PALM-fed infants, despite differences in study types and design. Future meta-analysis could benefit from including comparison with human milk-fed infants. PMID:28659741

Geometric modeling for computer aided design

NASA Technical Reports Server (NTRS)

Schwing, James L.

1992-01-01

The goal was the design and implementation of software to be used in the conceptual design of aerospace vehicles. Several packages and design studies were completed, including two software tools currently used in the conceptual level design of aerospace vehicles. These tools are the Solid Modeling Aerospace Research Tool (SMART) and the Environment for Software Integration and Execution (EASIE). SMART provides conceptual designers with a rapid prototyping capability and additionally provides initial mass property analysis. EASIE provides a set of interactive utilities that simplify the task of building and executing computer aided design systems consisting of diverse, stand alone analysis codes that result in the streamlining of the exchange of data between programs, reducing errors and improving efficiency.

Effects of a multifaceted minimal-lift environment for nursing staff: pilot results.

PubMed

Zadvinskis, Inga M; Salsbury, Susan L

2010-02-01

Nursing staff are at risk for musculoskeletal injuries because of the physical nature of patient handling. The purpose of this study is to examine the effectiveness of a multifaceted minimal-lift environment on reported equipment use, musculoskeletal injury rates, and workers' compensation costs for patient-handling injuries. The pilot study consists of a mixed measures design, with both descriptive and quasi-experimental design elements. The intervention consists of engineering (minimal-lift equipment), administrative (nursing policy), and behavioral (peer coach program) controls. The comparison nursing unit has received engineering controls only. The convenience sample includes nursing staff employed on two medical-surgical nursing units, who provide direct patient care at least 50% of the time. Nursing staff employed in a multifaceted lift environment report greater lift equipment use and experience less injury, with reduced worker's compensation costs.

Retail Flower Shop Salesperson and Floral Designer. Student's Manual.

ERIC Educational Resources Information Center

South Carolina State Dept. of Education, Columbia. Office of Vocational Education.

This document consists of the student manual for a course in retail flower shop sales and floral design for use in vocational education courses in high schools in South Carolina. The guide consists of 22 learning modules that incorporate the subject matter needed by workers in these jobs. Each learning module consists of an introduction,…

Establishing Interpretive Consistency When Mixing Approaches: Role of Sampling Designs in Evaluations

ERIC Educational Resources Information Center

Collins, Kathleen M. T.; Onwuegbuzie, Anthony J.

2013-01-01

The goal of this chapter is to recommend quality criteria to guide evaluators' selections of sampling designs when mixing approaches. First, we contextualize our discussion of quality criteria and sampling designs by discussing the concept of interpretive consistency and how it impacts sampling decisions. Embedded in this discussion are…

37 CFR 202.20 - Deposit of copies and phonorecords for copyright registration.

Code of Federal Regulations, 2010 CFR

2010-07-01

... motion pictures made from pre-existing black and white motion pictures, in addition to the deposit of one... work consists of a repeated pictorial or graphic design, the complete design and at least part of one.... (xviii) Architectural works. (A) For designs of unconstructed buildings, the deposit must consist of one...

Students' Attitudes towards the Use of Poetry in Second Language Classrooms

ERIC Educational Resources Information Center

Ardeshir, Danesh; Shirkhani, Servat

2015-01-01

This study investigates learners' attitudes towards poetry in foreign language learning. 63 Engineering Students at Islamic Azad University, Science and Research Branch attended the study. The instrument used in the study was a questionnaire designed by the researchers for the purpose of this study. The questionnaire consisted of 12 questions…

The Nevada Study on The Holocaust.

ERIC Educational Resources Information Center

Crawford, Barbara; Metcalf, Sandra

This study series on the Holocaust consists of four units designed for middle school/junior high and senior high students in United States and world history classes. The units may be self-contained or integrated into previous units of study. A 45-minute color video "Nevada Study on The Holocaust" accompanies this guide. The middle school…

Newspapers in Science Education: A Study Involving Sixth Grade Students

ERIC Educational Resources Information Center

Lai, Ching-San; Wang, Yun-Fei

2016-01-01

The purpose of this study was to explore the learning performance of sixth grade elementary school students using newspapers in science teaching. A quasi-experimental design with a single group was used in this study. Thirty-three sixth grade elementary school students participated in this study. The research instruments consisted of three…

Place of Instructional Supervision in Enhancing Public Primary School Teachers' Effectiveness

ERIC Educational Resources Information Center

Nwambam, Aja Sunday; Eze, Prisca Ijeoma

2017-01-01

The study examined the place of instructional supervision in enhancing teachers' effectiveness in public primary schools in Ebonyi State. Four research questions were formulated to guide the study. Descriptive survey research design was adopted for the study. The population of the study consists of all the 462,186 teachers including the…

Opinions of Teachers and Preservice Teachers of Social Studies on Geo-Literacy

ERIC Educational Resources Information Center

Memisoglu, Hatice

2017-01-01

The purpose of this study is to investigate the opinions of teachers and preservice teachers of social studies on geo-literacy. The study used the qualitative research design of phenomenology to collect data. The study consisted of 20 teachers and 30 prospective teachers of social studies. The purposive sampling method of criterion sampling was…

The Level of Test-Wiseness for the Students of Arts and Science Faculty at Sharourah and Its Relationship with Some Variables

ERIC Educational Resources Information Center

Otoum, Abedalqader; Khalaf, Hisham Bani; Bajbeer, Abedalqader; Hamad, Hassan Bani

2015-01-01

This study aimed to identify the level of using Test-wiseness strategies for the students of arts and sciences Faculty at Sharourah and its relationship with some variables. a questionnaire was designed which consisted of (29) items measuring three domains of Test-wiseness strategies. It was applied on a sample which consisted of (299) students.…

MRI Markers of Neurodegenerative and Neurovascular Changes in Relation to Postoperative Delirium and Postoperative Cognitive Decline.

PubMed

Kant, Ilse M J; de Bresser, Jeroen; van Montfort, Simone J T; Slooter, Arjen J C; Hendrikse, Jeroen

2017-10-01

Postoperative delirium (POD) and postoperative cognitive decline (POCD) are common in elderly patients. The aim of the present review was to explore the association of neurodegenerative and neurovascular changes with the occurrence of POD and POCD. Fifteen MRI studies were identified by combining multiple search terms for POD, POCD, and brain imaging. These studies described a total of 1,422 patients and were all observational in design. Neurodegenerative changes (global and regional brain volumes) did not show a consistent association with the occurrence of POD (four studies) or POCD (two studies). In contrast, neurovascular changes (white matter hyperintensities and cerebral infarcts) were more consistently associated with the occurrence of POD (seven studies) and POCD (five studies). In conclusion, neurovascular changes appear to be consistently associated with the occurrence of POD and POCD, and may identify patients at increased risk of these conditions. Larger prospective studies are needed to study the consistency of these findings and to unravel the underlying pathophysiological mechanisms. Copyright © 2017 The Authors. Published by Elsevier Inc. All rights reserved.

Studies in Southwest Spanish.

ERIC Educational Resources Information Center

Bowen, J. Donald, Ed.; Ornstein, Jacob, Ed.

The Spanish dialects of the Southwest United States have received little serious attention until recently. The present volume contains studies designed to contribute to the understanding and acceptance of Southwest Spanish. The book consists of the following chapters: (1) "Linguistic Diversity in Southwest Spanish," by Garland D. Bills…

Therapeutic Management of Feline Chronic Gingivostomatitis: A Systematic Review of the Literature

PubMed Central

Winer, Jenna N.; Arzi, Boaz; Verstraete, Frank J. M.

2016-01-01

Feline chronic gingivostomatitis (FCGS) is a disease characterized by protracted and potentially debilitating oral inflammation in cats, the etiology of which is currently unknown. The purpose of this review is to apply an evidence-based medicine approach to systematically review and critically evaluate the scientific literature reporting the outcome of medical and surgical management of FCGS. Those articles meeting inclusion criteria were reviewed and assigned an “Experimental Design Grade” (EDG) and an “Evidence Grade” (EG) in order to score relative strength of study design and produced data. Studies were evaluated and compared, especially highlighting the treatments, the outcomes, and the therapeutic success rates. This review found a lack of consistency between articles’ data, rendering direct comparison of results unreliable. The field of FCGS research, and ultimately patient care, would benefit from standardizing studies by adopting use of a consistent semi-quantitative scoring system and extending follow-up duration. Future researchers should commit to large prospective studies that compare existing treatments and demonstrate the promise of new treatments. PMID:27486584

Virtual screening studies to design potent CDK2-cyclin A inhibitors.

PubMed

Vadivelan, S; Sinha, Barij Nayan; Irudayam, Sheeba Jem; Jagarlapudi, Sarma A R P

2007-01-01

The cell division cycle is controlled by cyclin-dependent kinases (CDK), which consist of a catalytic subunit (CDK1-CDK8) and a regulatory subunit (cyclin A-H). Pharmacophore analysis indicates that the best inhibitor model consists of (1) two hydrogen bond acceptors, (2) one hydrogen bond donor, and (3) one hydrophobic feature. The HypoRefine pharmacophore model gave an enrichment factor of 1.31 and goodness of fit score of 0.76. Docking studies were carried out to explore the structural requirements for the CDK2-cyclin A inhibitors and to construct highly predictive models for the design of new inhibitors. Docking studies demonstrate the important role of hydrogen bond and hydrophobic interactions in determining the inhibitor-receptor binding affinity. The validated pharmacophore model is further used for retrieving the most active hits/lead from a virtual library of molecules. Subsequently, docking studies were performed on the hits, and novel series of potent leads were suggested based on the interaction energy between CDK2-cyclin A and the putative inhibitors.

A Stochastic Model of Plausibility in Live Virtual Constructive Environments

DTIC Science & Technology

2017-09-14

objective in virtual environment research and design is the maintenance of adequate consistency levels in the face of limited system resources such as...provides some commentary with regard to system design considerations and future research directions. II. SYSTEM MODEL DVEs are often designed as a...exceed the system’s requirements. Research into predictive models of virtual environment consistency is needed to provide designers the tools to

Trajectory Design for a Single-String Impactor Concept

NASA Technical Reports Server (NTRS)

Dono Perez, Andres; Burton, Roland; Stupl, Jan; Mauro, David

2017-01-01

This paper introduces a trajectory design for a secondary spacecraft concept to augment science return in interplanetary missions. The concept consist of a single-string probe with a kinetic impactor on board that generates an artificial plume to perform in-situ sampling. The trajectory design was applied to a particular case study that samples ejecta particles from the Jovian moon Europa. Results were validated using statistical analysis. Details regarding the navigation, targeting and disposal challenges related to this concept are presented herein.

Development of a Lifespan-Based Novel Composite Person-Reported Outcome Measure Using Data from the CINRG Duchenne Natural History Study

DTIC Science & Technology

2016-10-01

and should not be construed as an official Department of the Army position, policy or decision unless so designated by other documentation. REPORT...Applicability: Well- designed CAT-PRO questionnaires can be used in both clinical trials and day-to-day clinical practice. For clinical trials, they provide...confirm that items are responsive to self-reported changes in milestone ability over a time period consistent with design of contemporary clinical

Design and Experimental Study on Spinning Solid Rocket Motor

NASA Astrophysics Data System (ADS)

Xue, Heng; Jiang, Chunlan; Wang, Zaicheng

The study on spinning solid rocket motor (SRM) which used as power plant of twice throwing structure of aerial submunition was introduced. This kind of SRM which with the structure of tangential multi-nozzle consists of a combustion chamber, propellant charge, 4 tangential nozzles, ignition device, etc. Grain design, structure design and prediction of interior ballistic performance were described, and problem which need mainly considered in design were analyzed comprehensively. Finally, in order to research working performance of the SRM, measure pressure-time curve and its speed, static test and dynamic test were conducted respectively. And then calculated values and experimental data were compared and analyzed. The results indicate that the designed motor operates normally, and the stable performance of interior ballistic meet demands. And experimental results have the guidance meaning for the pre-research design of SRM.

Metaphorical Perceptions of Prospective Music Teachers towards "Traditional Turkish Classical Music Course" Concept

ERIC Educational Resources Information Center

Eldemir, Abdurrahim Can

2016-01-01

The purpose of this study is to determine the perceptions of prospective music teachers towards Traditional Turkish Art Music course by means of metaphors. Phenomenological design, one of qualitative study methods, was used in the study. The study group of our research consists of juniors and seniors studying in the Music Education Division,…

The Meaning of Marriage According to University Students: A Phenomenological Study

ERIC Educational Resources Information Center

Koçyigit Özyigit, Melike

2017-01-01

The aim of this study is to reveal the meanings university students attribute to marriage. The sample of the study consists of 14 final year students (7 males and 7 females), whose ages range between 22 and 32, studying in the Education Faculty at Ege University. The study is of "phenomenological research design". "Semi-structured…

Safety design approach for external events in Japan sodium-cooled fast reactor

DOE Office of Scientific and Technical Information (OSTI.GOV)

Yamano, H.; Kubo, S.; Tani, A.

2012-07-01

This paper describes a safety design approach for external events in the design study of Japan sodium-cooled fast reactor. An emphasis is introduction of a design extension external condition (DEEC). In addition to seismic design, other external events such as tsunami, strong wind, abnormal temperature, etc. were addressed in this study. From a wide variety of external events consisting of natural hazards and human-induced ones, a screening method was developed in terms of siting, consequence, frequency to select representative events. Design approaches for these events were categorized on the probabilistic, statistical and deterministic basis. External hazard conditions were considered mainlymore » for DEECs. In the probabilistic approach, the DEECs of earthquake, tsunami and strong wind were defined as 1/10 of exceedance probability of the external design bases. The other representative DEECs were also defined based on statistical or deterministic approaches. (authors)« less

Study of optical techniques for the Ames unitary wind tunnels. Part 1: Schlieren

NASA Technical Reports Server (NTRS)

Lee, George

1992-01-01

Alignment procedures and conceptual designs for the rapid alignment of the Ames Unitary Wind Tunnel schlieren systems were devised. The schlieren systems can be aligned by translating the light source, the mirrors, and the knife edge equal distances. One design for rapid alignment consists of a manual pin locking scheme. The other is a motorized electronic position scheme. A study of two optical concepts which can be used with the schlieren system was made. These are the 'point diffraction interferometers' and the 'focus schlieren'. Effects of vibrations were studied.

Data mining for materials design: A computational study of single molecule magnet

DOE Office of Scientific and Technical Information (OSTI.GOV)

Dam, Hieu Chi; Faculty of Physics, Vietnam National University, 334 Nguyen Trai, Hanoi; Pham, Tien Lam

2014-01-28

We develop a method that combines data mining and first principles calculation to guide the designing of distorted cubane Mn{sup 4+} Mn {sub 3}{sup 3+} single molecule magnets. The essential idea of the method is a process consisting of sparse regressions and cross-validation for analyzing calculated data of the materials. The method allows us to demonstrate that the exchange coupling between Mn{sup 4+} and Mn{sup 3+} ions can be predicted from the electronegativities of constituent ligands and the structural features of the molecule by a linear regression model with high accuracy. The relations between the structural features and magnetic propertiesmore » of the materials are quantitatively and consistently evaluated and presented by a graph. We also discuss the properties of the materials and guide the material design basing on the obtained results.« less

Comparative effectiveness research designs: an analysis of terms and coverage in Medical Subject Headings (MeSH) and Emtree*†

PubMed Central

Bekhuis, Tanja; Demner-Fushman, Dina; Crowley, Rebecca S.

2013-01-01

Objectives: We analyzed the extent to which comparative effectiveness research (CER) organizations share terms for designs, analyzed coverage of CER designs in Medical Subject Headings (MeSH) and Emtree, and explored whether scientists use CER design terms. Methods: We developed local terminologies (LTs) and a CER design terminology by extracting terms in documents from five organizations. We defined coverage as the distribution over match type in MeSH and Emtree. We created a crosswalk by recording terms to which design terms mapped in both controlled vocabularies. We analyzed the hits for queries restricted to titles and abstracts to explore scientists' language. Results: Pairwise LT overlap ranged from 22.64% (12/53) to 75.61% (31/41). The CER design terminology (n = 78 terms) consisted of terms for primary study designs and a few terms useful for evaluating evidence, such as opinion paper and systematic review. Patterns of coverage were similar in MeSH and Emtree (gamma = 0.581, P = 0.002). Conclusions: Stakeholder terminologies vary, and terms are inconsistently covered in MeSH and Emtree. The CER design terminology and crosswalk may be useful for expert searchers. For partially mapped terms, queries could consist of free text for modifiers such as nonrandomized or interrupted added to broad or related controlled terms. PMID:23646024

Parametric Design within an Atomic Design Process (ADP) applied to Spacecraft Design

NASA Astrophysics Data System (ADS)

Ramos Alarcon, Rafael

This thesis describes research investigating the development of a model for the initial design of complex systems, with application to spacecraft design. The design model is called an atomic design process (ADP) and contains four fundamental stages (specifications, configurations, trade studies and drivers) that constitute the minimum steps of an iterative process that helps designers find a feasible solution. Representative design models from the aerospace industry are reviewed and are compared with the proposed model. The design model's relevance, adaptability and scalability features are evaluated through a focused design task exercise with two undergraduate teams and a long-term design exercise performed by a spacecraft payload team. The implementation of the design model is explained in the context in which the model has been researched. This context includes the organization (a student-run research laboratory at the University of Michigan), its culture (academically oriented), members that have used the design model and the description of the information technology elements meant to provide support while using the model. This support includes a custom-built information management system that consolidates relevant information that is currently being used in the organization. The information is divided in three domains: personnel development history, technical knowledge base and laboratory operations. The focused study with teams making use of the design model to complete an engineering design exercise consists of the conceptual design of an autonomous system, including a carrier and a deployable lander that form the payload of a rocket with an altitude range of over 1000 meters. Detailed results from each of the stages of the design process while implementing the model are presented, and an increase in awareness of good design practices in the teams while using the model are explained. A long-term investigation using the design model consisting of the successful characterization of an imaging system for a spacecraft is presented. The spacecraft is designed to take digital color images from low Earth orbit. The dominant drivers from each stage of the design process are indicated as they were identified, with the accompanying hardware development leading to the final configuration that comprises the flight spacecraft.

Breach History and Susceptibility Study, South Jetty and Navigation Project, Grays Harbor, Washington

DTIC Science & Technology

2006-09-01

second phase of the project was modified to incorporate a soft solution design. The plan consisted of construction of a wave diffraction mound to reduce...and local public property (that is considered as private) in the U.S. Court of Federal Claims. An RSM approach was followed in this study...representation of hard bottom (non-erodible areas), and hot-start option. M2D has been designed as a local- scale model that can be easily and quickly

Conceptual design study of 1985 commercial VTOL transports that utilize rotors

NASA Technical Reports Server (NTRS)

Kefford, N. F. K.; Munch, C. L.

1975-01-01

Conceptual design studies of pure and compound helicopter commercial short-haul transport aircraft for initial fabrication in 1980 were performed to determine their technical and economic feasibility. One-hundred-passenger configurations were optimized for minimum direct operating cost consistent with producibility and marketability, with emphasis on proper account of mass properties, performance and handling qualities adequacy, and suppression of internal and external noise. The effect of external noise constraints was assessed, in terms of gross weight and direct operating cost, for each aircraft.

Corn blight review: Sampling model and ground data measurements program

NASA Technical Reports Server (NTRS)

Allen, R. D.

1972-01-01

The sampling plan involved the selection of the study area, determination of the flightline and segment sample design within the study area, and determination of a field sample design. Initial interview survey data consisting of crop species acreage and land use were collected. On all corn fields, additional information such as seed type, row direction, population, planting date, ect. were also collected. From this information, sample corn fields were selected to be observed through the growing season on a biweekly basis by county extension personnel.

Design for Life. Abortion. A Student's Lesson Plan [and] A Teacher's Lesson Plan [and] A Lawyer's Lesson Plan.

ERIC Educational Resources Information Center

Howard, Estelle; And Others

One of a series of secondary level teaching units presenting case studies with pro and con analyses of particular legal problems, the document consists of a student's lesson plan, a teacher's lesson plan, and a lawyer's lesson plan for a unit on abortion. The lessons are designed to expose students to the Supreme Court's decision concerning…

Characteristic Trends in Prevalence and Use of New Synthetic "Designer" Drugs over the Territory of the Republic of Bashkortostan

ERIC Educational Resources Information Center

Asadullin, Azat R.; Yuldashev, Vladimir L.; Galeeva, Elena Kh.; Achmetova, Elvina A.; Nikolaev, Ivan V.

2016-01-01

The urgency of this study has become vivid in the light of the growing problem of prevalence and use of new synthetic drug types, incidence rate of comorbid states, and pathomorphism of psychoactive substances consumption. The aim of this paper consists in analysis and disclosure of the research data obtained on consumption of such designer drugs…

Extreme ultraviolet and X-ray spectroheliograph for OSO-H

NASA Technical Reports Server (NTRS)

Sterk, A. A.; Kieser, F.; Peck, S.; Knox, E.

1972-01-01

A complex scientific instrument was designed, fabricated, tested, and calibrated for launch onboard OSO-H. This instrument consisted of four spectroheliographs and an X-ray polarimeter. The instrument is designed to study solar radiation at selected wavelengths in the X-ray and the extreme ultraviolet ranges, make observations at the H-alpha wavelength, and measure the degree of polarization of X-ray emissions.

Do Birds of a Feather Flock Together? An Examination of Calling, Congruence, Job Design and Personality as Predictors of Job Satisfaction and Tenure

ERIC Educational Resources Information Center

Nillsen, C.; Earl, J. K.; Elizondo, F.; Wadlington, P. L.

2014-01-01

This study explored whether congruence, calling, job characteristics or personality were better predictors of job satisfaction and tenure. The sample consisted of 1968 employees across four different job roles: sales engineers (N = 309), graphic designers (N = 383), teachers (N = 481) and clergy (N = 795). Data was collected as part of a selection…

Early Science Learning with a Virtual Tutor through Multimedia Explanations and Feedback on Spoken Questions

ERIC Educational Resources Information Center

Hautala, Jarkko; Baker, Doris Luft; Keurulainen, Aleksi; Ronimus, Miia; Richardson, Ulla; Cole, Ronald

2018-01-01

The purpose of this pilot study with a within-subject design was to gain a deeper understanding about the promise and restrictions of a virtual tutoring system designed to teach science to first grade students in Finland. Participants were 61 students who received six tutoring science sessions of approximately 20 min each. Sessions consisted of a…

Distributive Education II. Course of Study.

ERIC Educational Resources Information Center

Nelson, Frank W.

This curriculum guide for teacher-coordinators is designed to provide a course of study in distributive education (Distributive Education II) in Oklahoma. Content is in nine sections with each section consisting of one or more instructional units: (1) Orientation (Introduction to Distributive Occupations, DECA), (2) Survival Skills (Job…

Does the microbiome and virome contribute to myalgic encephalomyelitis/chronic fatigue syndrome?

PubMed Central

Newberry, Fiona; Hsieh, Shen-Yuan; Wileman, Tom; Carding, Simon R.

2018-01-01

Myalgic encephalomyelitis (ME)/chronic fatigue syndrome (CFS) (ME/CFS) is a disabling and debilitating disease of unknown aetiology. It is a heterogeneous disease characterized by various inflammatory, immune, viral, neurological and endocrine symptoms. Several microbiome studies have described alterations in the bacterial component of the microbiome (dysbiosis) consistent with a possible role in disease development. However, in focusing on the bacterial components of the microbiome, these studies have neglected the viral constituent known as the virome. Viruses, particularly those infecting bacteria (bacteriophages), have the potential to alter the function and structure of the microbiome via gene transfer and host lysis. Viral-induced microbiome changes can directly and indirectly influence host health and disease. The contribution of viruses towards disease pathogenesis is therefore an important area for research in ME/CFS. Recent advancements in sequencing technology and bioinformatics now allow more comprehensive and inclusive investigations of human microbiomes. However, as the number of microbiome studies increases, the need for greater consistency in study design and analysis also increases. Comparisons between different ME/CFS microbiome studies are difficult because of differences in patient selection and diagnosis criteria, sample processing, genome sequencing and downstream bioinformatics analysis. It is therefore important that microbiome studies adopt robust, reproducible and consistent study design to enable more reliable and valid comparisons and conclusions to be made between studies. This article provides a comprehensive review of the current evidence supporting microbiome alterations in ME/CFS patients. Additionally, the pitfalls and challenges associated with microbiome studies are discussed. PMID:29523751

Optimum design of Geodesic dome’s jointing system

NASA Astrophysics Data System (ADS)

Tran, Huy. T.

2018-04-01

This study attempts to create a new design for joint connector of Geodesic dome. A new type of joint connector design is proposed for flexible rotating connection; comparing it to another, this design is cheaper and workable. After calculating the bearing capacity of the sample according to EC3 and Vietnam standard TCVN 5575-2012, FEM model of the design sample is carried out in many specific situation to consider the stress distribution, the deformation, the local destruction… in the connector. The analytical results and the FE data are consistent. The FE analysis also points out the behavior of some details that simple calculation cannot show. Hence, we can choose the optimum design of joint connector.

The Relationship between Teachers' Occupational Professionalism and Organizational Alienation

ERIC Educational Resources Information Center

Yorulmaz, Yilmaz Ilker; Altinkurt, Yahya; Yilmaz, Kursad

2015-01-01

The purpose of this study is to determine the relationship between occupational professionalism and organizational alienation levels of teachers. The study is designed as a survey model. The sample of the study consists of 303 teachers working in the Mugla province of Turkey. Participants were selected by using the disproportionate cluster…

The New Workforce Generation: Understanding the Problems Facing Parental Involvement in Jordanian Kindergartens

ERIC Educational Resources Information Center

Ihmeideh, Fathi; Khasawneh, Samer; Mahfouz, Safi; Khawaldeh, Moustafa

2008-01-01

This study aimed to investigate the problems facing parental involvement in Jordanian kindergartens from the parents' perspectives. A 36-item questionnaire that addressed five domains was designed by the researchers and distributed among the study participants. The study sample consisted of 297 parents of kindergarten children from various…

Gender Differences in Attitudes toward Environmental Science

ERIC Educational Resources Information Center

Carrier, Sarah J.

2007-01-01

This study examined the role of gender in the areas of environmental education that included environmental knowledge, attitudes, behaviors, and comfort levels in the outdoors. The current study was part of a larger study designed to explore the effects of a treatment that consisted of 14 weeks of outdoor lessons conducted in the schoolyard as…

A Longitudinal Study of Judge Leniency and Consistency.

ERIC Educational Resources Information Center

Lunz, Mary E.; O'Neill, Thomas R.

This retrospective longitudinal study was designed to show grading leniency patterns of judges within and across clinical examination administrations. Data from 17 different administrations of the histology examination of the American Society of Clinical Pathologists over 10 years were studied. Over the 10 years there were 4,683 candidates and 57…

The Investigation of Study Strategies that Maximize Learning for Underprepared Students

ERIC Educational Resources Information Center

Cukras, Grace-Ann Gorga

2006-01-01

Research has consistently found that college students, especially freshmen, are not independent learners. To help students become self-regulated learners, reading and study skills courses as well as academic assistance programs should be designed to address this concern. Students must develop an inventory of study strategies that can be…

Policy Study of Vocational and Adult Education in Rural Areas.

ERIC Educational Resources Information Center

Mertens, Donna M.

This study of the vocational and adult education system in isolated rural areas was designed to provide information that is necessary for the development of policy for vocational and adult education in isolated rural areas. The study consisted of a review of literature; unstructured interviews with representatives of the business, civic, and…

A Relational Frame Training Intervention to Raise Intelligence Quotients: A Pilot Study

ERIC Educational Resources Information Center

Cassidy, Sarah; Roche, Bryan; Hayes, Steven C.

2011-01-01

The current research consisted of 2 studies designed to test the effectiveness of automated multiple-exemplar relational training in raising children's general intellectual skills. In Study 1, 4 participants were exposed to multiple exemplar training in stimulus equivalence and the relational frames of SAME, OPPOSITE, MORE THAN, and LESS THAN…

Scoping Materials for Initial Design of EPA Research Study on Potential Relationships Between Hydraulic Fracturing and Drinking Water Resources, March 2010

EPA Pesticide Factsheets

The purpose of this document is to describe the initial steps in framing a study consistent with the House of Representatives Appropriate Conference committee mandate to carry out a study on the relationship between hydraulic fracturing and drinking water.

Predictive and Explanatory Relationship Model between Procrastination, Motivation, Anxiety and Academic Achievement

ERIC Educational Resources Information Center

Akpur, Ugur

2017-01-01

Purpose: The purpose of this study is to determine the predictive and explanatory relationship model between procrastination, motivation, anxiety and academic achievement of university students. Research Methods: In this study, a causal research design was used. The study group consisted of 211 participants. In order to determine their motivation…

Clarifying the Link between Parental Psychological Control and Adolescents' Depressive Symptoms: Reciprocal versus Unidirectional Models

ERIC Educational Resources Information Center

Soenens, Bart; Luyckx, Koen; Vansteenkiste, Maarten; Duriez, Bart; Goossens, Luc

2008-01-01

Research has demonstrated consistent positive associations between perceived parental psychological control and adolescents' depressive symptoms, but the direction of influence remains unclear. Using a cross-lagged longitudinal design in two samples of late (Study 1, N = 396) and middle (Study 2, N = 724) adolescents, this study compared three…

Culturally Sensitive Interventions and Substance Use: A Meta-Analytic Review of Outcomes among Minority Youths

ERIC Educational Resources Information Center

Hodge, David R.; Jackson, Kelly F.; Vaughn, Michael G.

2012-01-01

This study assessed the effectiveness of culturally sensitive interventions (CSIs) ("N" = 10) designed to address substance use among minority youths. Study methods consisted of systematic search procedures, quality of study ratings, and meta-analytic techniques to gauge effects and evaluate publication bias. The results, across all measures and…

Teachers' Views about Educational Research: A Qualitative Study

ERIC Educational Resources Information Center

Bas, Gökhan; Kivilcim, Zafer Savas

2017-01-01

The purpose of this case study is to examine the views of teachers' about educational research. The present research is designed as a qualitative case study. The group of this study is consisted of teachers (n = 27), working in primary, middle, and high schools in the province of Nigde in Turkey. An extensive literature review was made on…

Investigating Lifelong Learning Dispositions of Students Studying English Language and Literature in Terms of Different Variables

ERIC Educational Resources Information Center

Elaldi, Senel

2015-01-01

This study aims to determine lifelong learning dispositions of English Language and Literature students in terms of gender, grade levels, and age variables. Descriptive research design was used. The study group consisted of 402 students studying English Language and Literature at Cumhuriyet University in Sivas, Turkey. Research data were collected…

Design and Implementation of a Multi-Strategy, Collegewide Program of Evaluation and Planning: The Mercy College Self-Study Project.

ERIC Educational Resources Information Center

Kraetzer, Mary C.; And Others

The rationale, strategies, and methods of The Mercy College Self-Study Project are considered, and evaluation instruments are provided. This program of institutional evaluation and planning was initiated in 1980 and consists of: standardized surveys, a 10-year longitudinal (panel) study, and academic department self-studies. Questionnaires…

Causes of Student Absenteeism and School Dropouts

ERIC Educational Resources Information Center

Sahin, Seyma; Arseven, Zeynep; Kiliç, Abdurrahman

2016-01-01

The aim of the study is to investigate the causes of student absenteeism and school dropouts at primary, secondary and high school level in Düzce Province and to develop suggestions for solving these problems. A "case study" design, which is one of the qualitative research approaches, was used in this study. The study group consisted of…

Truancy and Its Influence on Students' Learning in Dormaa Senior High School

ERIC Educational Resources Information Center

Henry, Gyimah; Yelkpieri, Daniel

2017-01-01

The study instigated the incidence of truancy among students and its influence on learning in the Dormaa Senior High School. A descriptive survey design was adopted in carrying out the study. The study population consisted of teachers, students, parents and opinion leaders in the study area. The simple random and purposive samplings were used in…

What Is Innovative Geography Teaching? A Perspective from Geography Teachers

ERIC Educational Resources Information Center

Artvinli, Eyüp

2017-01-01

The purpose of the study is to examine views of geography teachers on innovative geography teaching. The study group consists of 15 geography teachers (8 Females, 7 Males). The study is designed in keeping with phenomenological research. Semi-structured interview form is used as a data collection tool in the study. The collected data are analyzed…

Evaluation, Feasibility, and Design of a Three-Wavelength Infrared Atmospheric Aerosol Extinctiometer.

DTIC Science & Technology

1980-09-02

laser or searchlight measurements . The study program consisted of three basic tasks: (1) a review of existing techniques for measuring aerosol extinction ...to aerosol extinction along a path can be deduced. Solutions to this problcaii fall into several classes. One class of solutions invoLves measuring ...employed such a windowless system to measure the absorption of an artificial aerosol consisting of quartz particles, using a CO 2 laser in the

Progress on the Low Frequency All Sky Monitor

NASA Astrophysics Data System (ADS)

Ford, Anthony; Jenet, F.; Craig, J.; Creighton, T. D.; Dartez, L. P.; Hicks, B.; Hinojosa, J.; Jaramillo, R.; Kassim, N. E.; Lunsford, G.; Miller, R. B.; Murray, J.; Ray, P. S.; Rivera, J.; Taylor, G. B.

2013-01-01

The Low Frequency All Sky Monitor is a system of geographically separated radio arrays dedicated to the study of radio transients. LoFASM consists of four stations, each comprised of 12 cross-dipole antennas designed to operate between 5-88MHz. The antennas and front end electronics for LoFASM were designed by the Naval Research Laboratory for the Long Wavelength Array project. Over the last year, undergraduate students from the University of Texas at Brownsville’s Center for Advanced Radio Astronomy have been establishing these stations around the continental US, consisting of sites located in Port Mansfield, Texas, the LWA North Arm site of the LWA1 Radio Observatory in New Mexico, adjacent to the North Arm of the Very Large Array, the Green Bank Radio Observatory, West Virginia, and NASA’s Goldstone tracking complex in California. In combination with the establishment of these sites was the development of the analog hardware, which consists of commercial off-the-shelf RF splitter/combiners and a custom amplifier and filter chain designed by colleagues at the University of New Mexico. This poster will expound on progress in site installation and development of the analog signal chain.

Design definition of a microwave power reception and conversion system for use on a high altitude powered platform

NASA Technical Reports Server (NTRS)

Brown, W. C.

1981-01-01

The design definition of a microwave power reception and conversion system for use on high altitude powered platform is presented. The study includes an initial design, construction and test effort on a thin film, printed circuit rectenna. A study of a low altitude demonstration of an airborne rectenna was made starting with the assumption that a fifty foot mechanically steerable parabolic reflector at the Wallops Flight Center would be retrofitted with a low microwave power source consisting of a five kilowatt commercially available magnetron and that a small blimp would be used to support the rectenna.

Dewar technology study

NASA Technical Reports Server (NTRS)

Davis, W.

1975-01-01

The development of a Dewar system for handling liquid helium under weightless conditions is described. Porous plug designs for the prevention of superfluid creep out of the dewar through the vent line were evaluated. For the purpose of designing a neck to provide a transition from the cold cavity to the outside, the loads carried by the neck and equipment supports were studied. Temperature, pressure, and mass flow instrumentation for monitoring Dewar performance were also evaluated. In addition, multilayer blankets consisting of aluminized Mylar separated by Dacron net sheets were designed to insulate the pressure vessel. The dewar system is suggested for use with the star tracking telescope aboard the relativity satellite.

Optimization in the systems engineering process

NASA Technical Reports Server (NTRS)

Lemmerman, Loren A.

1993-01-01

The essential elements of the design process consist of the mission definition phase that provides the system requirements, the conceptual design, the preliminary design and finally the detailed design. Mission definition is performed largely by operations analysts in conjunction with the customer. The result of their study is handed off to the systems engineers for documentation as the systems requirements. The document that provides these requirements is the basis for the further design work of the design engineers at the Lockheed-Georgia Company. The design phase actually begins with conceptual design, which is generally conducted by a small group of engineers using multidisciplinary design programs. Because of the complexity of the design problem, the analyses are relatively simple and generally dependent on parametric analyses of the configuration. The result of this phase is a baseline configuration from which preliminary design may be initiated.

Study and Development of an Air Conditioning System Operating on a Magnetic Heat Pump Cycle

NASA Technical Reports Server (NTRS)

Wang, Pao-Lien

1991-01-01

This report describes the design of a laboratory scale demonstration prototype of an air conditioning system operating on a magnetic heat pump cycle. Design parameters were selected through studies performed by a Kennedy Space Center (KSC) System Simulation Computer Model. The heat pump consists of a rotor turning through four magnetic fields that are created by permanent magnets. Gadolinium was selected as the working material for this demonstration prototype. The rotor was designed to be constructed of flat parallel disks of gadolinium with very little space in between. The rotor rotates in an aluminum housing. The laboratory scale demonstration prototype is designed to provide a theoretical Carnot Cycle efficiency of 62 percent and a Coefficient of Performance of 16.55.

Computer Design Technology of the Small Thrust Rocket Engines Using CAE / CAD Systems

NASA Astrophysics Data System (ADS)

Ryzhkov, V.; Lapshin, E.

2018-01-01

The paper presents an algorithm for designing liquid small thrust rocket engine, the process of which consists of five aggregated stages with feedback. Three stages of the algorithm provide engineering support for design, and two stages - the actual engine design. A distinctive feature of the proposed approach is a deep study of the main technical solutions at the stage of engineering analysis and interaction with the created knowledge (data) base, which accelerates the process and provides enhanced design quality. The using multifunctional graphic package Siemens NX allows to obtain the final product -rocket engine and a set of design documentation in a fairly short time; the engine design does not require a long experimental development.

Procedure for developing experimental designs for accelerated tests for service-life prediction. [for solar cell modules

NASA Technical Reports Server (NTRS)

Thomas, R. E.; Gaines, G. B.

1978-01-01

Recommended design procedures to reduce the complete factorial design by retaining information on anticipated important interaction effects, and by generally giving up information on unconditional main effects are discussed. A hypothetical photovoltaic module used in the test design is presented. Judgments were made of the relative importance of various environmental stresses such as UV radiation, abrasion, chemical attack, temperature, mechanical stress, relative humidity and voltage. Consideration is given to a complete factorial design and its graphical representation, elimination of selected test conditions, examination and improvement of an engineering design, and parametric study. The resulting design consists of a mix of conditional main effects and conditional interactions and represents a compromise between engineering and statistical requirements.

Creating meaningful learning experiences: Understanding students' perspectives of engineering design

NASA Astrophysics Data System (ADS)

Aleong, Richard James Chung Mun

There is a societal need for design education to prepare holistic engineers with the knowledge, skills, and attitudes to innovate and compete globally. Design skills are paramount to the espoused values of higher education, as institutions of higher learning strive to develop in students the cognitive abilities of critical thinking, problem solving, and creativity. To meet these interests from industry and academia, it is important to advance the teaching and learning of engineering design. This research aims to understand how engineering students learn and think about design, as a way for engineering educators to optimize instructional practice and curriculum development. Qualitative research methodology was used to investigate the meaning that engineering students' ascribe to engineering design. The recruitment of participants and corresponding collection of data occurred in two phases using two different data collection techniques. The first phase involved the distribution of a one-time online questionnaire to all first year, third year, and fourth year undergraduate engineering students at three Canadian Universities. After the questionnaire, students were asked if they would be willing to participate in the second phase of data collection consisting of a personal interview. A total of ten students participated in interviews. Qualitative data analysis procedures were conducted on students' responses from the questionnaire and interviews. The data analysis process consisted of two phases: a descriptive phase to code and categorize the data, followed by an interpretative phase to generate further meaning and relationships. The research findings present a conceptual understanding of students' descriptions about engineering design, structured within two educational orientations: a learning studies orientation and a curriculum studies orientation. The learning studies orientation captured three themes of students' understanding of engineering design: awareness, relevance, and transfer. With this framework of student learning, engineering educators can enhance learning experiences by engaging all three levels of students' understanding. The curriculum studies orientation applied the three holistic elements of curriculum---subject matter, society, and the individual---to conceptualize design considerations for engineering curriculum and teaching practice. This research supports the characterization of students' learning experiences to help educators and students optimize their teaching and learning of design education.

Pilot GPS LORAN Receiver Programming Performance A Laboratory Evaluation

DOT National Transportation Integrated Search

1994-02-01

This study was designed to explore GPS/LORAN receiver programming performance under : simulated flight conditions. The programming task consisted of entering, editing, and : verifying a four-waypoint flight plan. The task demands were manipulated by ...

Perspectives in adolescent risk-taking through instrument development.

PubMed

Busen, N H; Kouzekanani, K

2000-01-01

Understanding the high-risk adolescent's perception of risk taking is essential for health professionals to determine appropriate interventions. The purpose of this study was to examine the psychometric properties of the revised Adolescent Risk-Taking Instrument (ARTI) designed to measure the high-risk adolescent's perception of risk taking. This study also examined the variables that are most predictive of social adaptation and risk taking. An ex post facto design was used to standardize data collection and to assess the psychometric properties of the revised ARTI. The nonprobability sample consisted of 167 adolescents attending school in an urban, health-underserved area. Exploratory factor analysis supported construct validity, and Chronbach's Coefficient Alpha supported internal consistency reliability. The reliability coefficient for the risk taking and social adaptation constructs were .80 and .77, respectively. Current perspectives on adolescent risk taking and implications for the use of the ARTI in clinical practice are addressed.

Learning-based position control of a closed-kinematic chain robot end-effector

NASA Technical Reports Server (NTRS)

Nguyen, Charles C.; Zhou, Zhen-Lei

1990-01-01

A trajectory control scheme whose design is based on learning theory, for a six-degree-of-freedom (DOF) robot end-effector built to study robotic assembly of NASA hardwares in space is presented. The control scheme consists of two control systems: the feedback control system and the learning control system. The feedback control system is designed using the concept of linearization about a selected operating point, and the method of pole placement so that the closed-loop linearized system is stabilized. The learning control scheme consisting of PD-type learning controllers, provides additional inputs to improve the end-effector performance after each trial. Experimental studies performed on a 2 DOF end-effector built at CUA, for three tracking cases show that actual trajectories approach desired trajectories as the number of trials increases. The tracking errors are substantially reduced after only five trials.

Genotyping by Sequencing Using Specific Allelic Capture to Build a High-Density Genetic Map of Durum Wheat

PubMed Central

Holtz, Yan; Ardisson, Morgane; Ranwez, Vincent; Besnard, Alban; Leroy, Philippe; Poux, Gérard; Roumet, Pierre; Viader, Véronique; Santoni, Sylvain; David, Jacques

2016-01-01

Targeted sequence capture is a promising technology which helps reduce costs for sequencing and genotyping numerous genomic regions in large sets of individuals. Bait sequences are designed to capture specific alleles previously discovered in parents or reference populations. We studied a set of 135 RILs originating from a cross between an emmer cultivar (Dic2) and a recent durum elite cultivar (Silur). Six thousand sequence baits were designed to target Dic2 vs. Silur polymorphisms discovered in a previous RNAseq study. These baits were exposed to genomic DNA of the RIL population. Eighty percent of the targeted SNPs were recovered, 65% of which were of high quality and coverage. The final high density genetic map consisted of more than 3,000 markers, whose genetic and physical mapping were consistent with those obtained with large arrays. PMID:27171472

Structural tailoring of counter rotation propfans

NASA Technical Reports Server (NTRS)

Brown, Kenneth W.; Hopkins, D. A.

1989-01-01

The STAT program was designed for the optimization of single rotation, tractor propfan designs. New propfan designs, however, generally consist of two counter rotating propfan rotors. STAT is constructed to contain two levels of analysis. An interior loop, consisting of accurate, efficient approximate analyses, is used to perform the primary propfan optimization. Once an optimum design has been obtained, a series of refined analyses are conducted. These analyses, while too computer time expensive for the optimization loop, are of sufficient accuracy to validate the optimized design. Should the design prove to be unacceptable, provisions are made for recalibration of the approximate analyses, for subsequent reoptimization.

Survey of Experience Using Reinforced Concrete in Floating Marine Structures.

DTIC Science & Technology

1983-01-01

organizations involved in materials research and testing . The second largest group consists of those involved in design, consulting, and construction...This distribution is consistent with the open literature where the majority of articles are concerned with materials research, testing , and design. Only...example, organizations involved in materials research, design, testing , and certification were visited in the Netherlands, France, Norway, Scotland, and

SCALS: a fourth-generation study of assisted living technologies in their organisational, social, political and policy context

PubMed Central

Greenhalgh, Trisha; Shaw, Sara; Wherton, Joe; Hughes, Gemma; Lynch, Jenni; A'Court, Christine; Hinder, Sue; Fahy, Nick; Byrne, Emma; Finlayson, Alexander; Sorell, Tom; Procter, Rob; Stones, Rob

2016-01-01

Introduction Research to date into assisted living technologies broadly consists of 3 generations: technical design, experimental trials and qualitative studies of the patient experience. We describe a fourth-generation paradigm: studies of assisted living technologies in their organisational, social, political and policy context. Fourth-generation studies are necessarily organic and emergent; they view technology as part of a dynamic, networked and potentially unstable system. They use co-design methods to generate and stabilise local solutions, taking account of context. Methods and analysis SCALS (Studies in Co-creating Assisted Living Solutions) consists (currently) of 5 organisational case studies, each an English health or social care organisation striving to introduce technology-supported services to support independent living in people with health and/or social care needs. Treating these cases as complex systems, we seek to explore interdependencies, emergence and conflict. We employ a co-design approach informed by the principles of action research to help participating organisations establish, refine and evaluate their service. To that end, we are conducting in-depth ethnographic studies of people's experience of assisted living technologies (micro level), embedded in evolving organisational case studies that use interviews, ethnography and document analysis (meso level), and exploring the wider national and international context for assisted living technologies and policy (macro level). Data will be analysed using a sociotechnical framework developed from structuration theory. Ethics and dissemination Research ethics approval for the first 4 case studies has been granted. An important outcome will be lessons learned from individual co-design case studies. We will document the studies’ credibility and rigour, and assess the transferability of findings to other settings while also recognising unique aspects of the contexts in which they were generated. Academic outputs will include a cross-case analysis and progress in theory and method of fourth-generation assisted living technology research. We will produce practical guidance for organisations, policymakers, designers and service users. PMID:26880671

User-Centered Design, Experience, and Usability of an Electronic Consent User Interface to Facilitate Informed Decision-Making in an HIV Clinic.

PubMed

Ramos, S Raquel

2017-11-01

Health information exchange is the electronic accessibility and transferability of patient medical records across various healthcare settings and providers. In some states, patients have to formally give consent to allow their medical records to be electronically shared. The purpose of this study was to apply a novel user-centered, multistep, multiframework approach to design and test an electronic consent user interface, so patients with HIV can make more informed decisions about electronically sharing their health information. This study consisted of two steps. Step 1 was a cross-sectional, descriptive, qualitative study that used user-centric design interviews to create the user interface. This informed Step 2. Step 2 consisted of a one group posttest to examine perceptions of usefulness, ease of use, preference, and comprehension of a health information exchange electronic consent user interface. More than half of the study population had college experience, but challenges remained with overall comprehension regarding consent. The user interface was not independently successful, suggesting that in addition to an electronic consent user interface, human interaction may also be necessary to address the complexities associated with consenting to electronically share health information. Comprehension is key factor in the ability to make informed decisions.

Retrieval Enhances Route Knowledge Acquisition, but Only When Movement Errors Are Prevented

ERIC Educational Resources Information Center

Kelly, Jonathan W.; Carpenter, Shana K.; Sjolund, Lori A.

2015-01-01

Studies of the "testing effect" have shown that retrieval significantly improves learning. However, most of these studies have been restricted to simple types of declarative verbal knowledge. Five experiments were designed to explore whether testing improves acquisition of route knowledge, which has a procedural component consisting of…

Hypermedia and Vocabulary Acquisition for Second Language

ERIC Educational Resources Information Center

Meli, Rocio

2009-01-01

The purpose of this study was to examine the impact of multimedia as a delivery tool for enhancing vocabulary in second-language classrooms. The mixed method design focused on specific techniques to help students acquire Spanish vocabulary and communication skills. The theoretical framework for this study consisted of second language theories…

Quality Assurance of University Education: Whose Responsibility?

ERIC Educational Resources Information Center

Ibijola, Elizabeth Yinka

2015-01-01

This study sought the opinion of stakeholders in university education, to know who should be responsible for quality assurance of university education in Nigeria. Descriptive research of survey design was employed in the study. The population consisted of all public university staff members, students and the employers of Nigerian university…

Factors Associated with Abnormal Eating Attitudes among Greek Adolescents

ERIC Educational Resources Information Center

Bilali, Aggeliki; Galanis, Petros; Velonakis, Emmanuel; Katostaras, Theofanis

2010-01-01

Objective: To estimate the prevalence of abnormal eating attitudes among Greek adolescents and identify possible risk factors associated with these attitudes. Design: Cross-sectional, school-based study. Setting: Six randomly selected schools in Patras, southern Greece. Participants: The study population consisted of 540 Greek students aged 13-18…

Qualification Users' Perceptions and Experiences of Assessment Reliability

ERIC Educational Resources Information Center

Chamberlain, Suzanne

2013-01-01

This paper presents the findings of a study designed to explore qualification users' perceptions and experiences of reliability in the context of national assessment outcomes in England. The study consisted of 17 focus groups conducted across six sectors of qualification users: students, teachers, trainee teachers, job-seekers, employers and…

Future Elementary School Teachers' Conceptual Change Concerning Photosynthesis

ERIC Educational Resources Information Center

Ahopelto, Ilona; Mikkila-Erdmann, Mirjamaija; Anto, Erkki; Penttinen, Marjaana

2011-01-01

The purpose of this study was to examine conceptual change among future elementary school teachers while studying a scientific text concerning photosynthesis. Students' learning goals in relation to their learning outcomes were also examined. The participants were future elementary school teachers. The design consisted of pre- and post-tests. The…

Essays on Technology-Enabled Platforms

ERIC Educational Resources Information Center

Koh, Tat Koon

2012-01-01

This dissertation consists of three studies that examine dynamics on Business-to-Business (B2B) exchanges and crowd-based design contest platforms. In the first study, we examine trust formation and development in global buyer-supplier relationships. Trust affects all business relationships, especially global B2B transactions due to the distances…

Anthropogenic-based regional-scale factors most consistently explain plot-level exotic diversity in grasslands

USDA-ARS?s Scientific Manuscript database

Invasion is viewed as a dominant threat to Earth’s biological diversity, but evidence linking the accumulation of exotic species to the simultaneous suppression of native diversity is equivocal, relying heavily on data from studies using different methods and designs. Fine-scale studies often descr...

Economics and Entrepreneurship. Teaching Strategies. Master Curriculum Guide.

ERIC Educational Resources Information Center

Clow, John E.; And Others

Designed for high school teachers of economics, social studies, and business education, this teaching package provides materials for a course that combines study of basic economic concepts with an understanding of entrepreneurship. The teacher resource manual consists of three parts. Part 1 is an overview of the relationship between economics and…

Perceptions of EFL College Students toward Collaborative Learning

ERIC Educational Resources Information Center

Chen, Yingling

2018-01-01

The purpose of the study was to understand the perceptions of EFL college students toward collaborative learning (CL). This qualitative research design used narrative approach since the study emphasized on each participant's learning experiences with CL strategy. The data collection instruments for this research were consisted by interview…

Methodology for safety optimization of highway cross-sections for horizontal curves with restricted sight distance.

PubMed

Ibrahim, Shewkar E; Sayed, Tarek; Ismail, Karim

2012-11-01

Several earlier studies have noted the shortcomings with existing geometric design guides which provide deterministic standards. In these standards the safety margin of the design output is generally unknown and there is little knowledge of the safety implications of deviating from the standards. To mitigate these shortcomings, probabilistic geometric design has been advocated where reliability analysis can be used to account for the uncertainty in the design parameters and to provide a mechanism for risk measurement to evaluate the safety impact of deviations from design standards. This paper applies reliability analysis for optimizing the safety of highway cross-sections. The paper presents an original methodology to select a suitable combination of cross-section elements with restricted sight distance to result in reduced collisions and consistent risk levels. The purpose of this optimization method is to provide designers with a proactive approach to the design of cross-section elements in order to (i) minimize the risk associated with restricted sight distance, (ii) balance the risk across the two carriageways of the highway, and (iii) reduce the expected collision frequency. A case study involving nine cross-sections that are parts of two major highway developments in British Columbia, Canada, was presented. The results showed that an additional reduction in collisions can be realized by incorporating the reliability component, P(nc) (denoting the probability of non-compliance), in the optimization process. The proposed approach results in reduced and consistent risk levels for both travel directions in addition to further collision reductions. Copyright © 2012 Elsevier Ltd. All rights reserved.

Observations Regarding Use of Advanced CFD Analysis, Sensitivity Analysis, and Design Codes in MDO

NASA Technical Reports Server (NTRS)

Newman, Perry A.; Hou, Gene J. W.; Taylor, Arthur C., III

1996-01-01

Observations regarding the use of advanced computational fluid dynamics (CFD) analysis, sensitivity analysis (SA), and design codes in gradient-based multidisciplinary design optimization (MDO) reflect our perception of the interactions required of CFD and our experience in recent aerodynamic design optimization studies using CFD. Sample results from these latter studies are summarized for conventional optimization (analysis - SA codes) and simultaneous analysis and design optimization (design code) using both Euler and Navier-Stokes flow approximations. The amount of computational resources required for aerodynamic design using CFD via analysis - SA codes is greater than that required for design codes. Thus, an MDO formulation that utilizes the more efficient design codes where possible is desired. However, in the aerovehicle MDO problem, the various disciplines that are involved have different design points in the flight envelope; therefore, CFD analysis - SA codes are required at the aerodynamic 'off design' points. The suggested MDO formulation is a hybrid multilevel optimization procedure that consists of both multipoint CFD analysis - SA codes and multipoint CFD design codes that perform suboptimizations.

Civic Education as a Collaborative Dimension of Social Studies Education in Attainment of Political Ethics in Nigeria

ERIC Educational Resources Information Center

Dania, Peter

2015-01-01

The paper investigated Civic Education as a collaborative dimension of Social Studies Education in attainment of political ethics in Nigeria. The study adopted the survey research design. The sample for the study consisted of 580 Social Studies teachers selected from thirty secondary schools in the three senatorial districts of Delta State. The…

Effects of Problem-Solving Method on Secondary School Students' Achievement and Retention in Social Studies, in Ekiti State, Nigeria

ERIC Educational Resources Information Center

Abdu-Raheem, B. O.

2012-01-01

This study investigated the effects of problem-solving method of teaching on secondary school students' achievement and retention in Social Studies. The study adopted the quasi-experimental, pre-test, post-test, control group design. The sample for the study consisted of 240 Junior Secondary School Class II students randomly selected from six…

Is Soliciting Important in Science? an Investigation of Science Teacher-Student Questioning Interactions

ERIC Educational Resources Information Center

Patrick, Ajaja O.; Urhievwejire, Eravwoke Ochuko

2012-01-01

The major purpose of this study was to determine the questioning patterns of teachers in science classes. The design employed for the study was a case study. To guide this study, five research questions were asked and answered. The samples of the study consisted of 20 senior secondary schools and 60 science teachers. The instruments used for data…

Activity-Based Teaching in Social Studies Education: An Action Research

ERIC Educational Resources Information Center

Akkus, Zekerya

2015-01-01

The aim of this study was to determine pre-service social studies teachers' skills to plan and apply the activity-based teaching and contribute to their development of these skills. In the study, the action research design of qualitative research was used. The sample of the study consisted of 6 pre-service teachers who were 4th year students at…

Design and fabrication of a prototype system for a photovoltaic residence in the Northeast

NASA Astrophysics Data System (ADS)

1982-08-01

This project consisted of the design, fabrication, and testing of a photovoltaic residence which is suitable for construction in the Northeast. A full size residence was designed which included energy conserving and passive features, and the energy performance of the residence was completed for a 5 kW PV array in a standoff configuration. Actual construction consisted of the roof structure and a building enclosure large enough to contain the PCU, test equipment, and load simulation equipment. The PV array consists of 78 modules along with a line tie inverter.

Effectivity of Azotobacter chroococcum and arbuscular mycorrhiza fungi on physiological characteristics and growth of cocoa seedlings

NASA Astrophysics Data System (ADS)

Nasaruddin; Ridwan, I.

2018-05-01

This study aims to study the effectiveness of Azotobacter chroococcum bacteria and Arbuscula mycorrhiza on some physiological characteristics and growth of cocoa seedlings. The study was conducted from March to October 2015, designed in the form of a two factors experiment based on the Randomized Block Design in a screen house. Inoculation of A chroococcum as the first factor consisted of control, inoculation of 104 CFU ml-1 water and 106 CFU ml-1 water per tree given as much as 40 ml. Inoculation of arbuscula mycorrhiza as a second factor consisted of control, inoculation of 3.0 g, 6.0 g and 9.0 g per tree, respectively. The experimental results show that inoculation of Azotobacter chroococcum 106 CFU ml-1 water tree-1 and the arbuscular mycorrhizal fungi 6.0 g tree-1 resulted in higher chlorophyll a, b and total leaf chlorophyll content, increased light absorption rate, leaf stomatal conductance and better seedling growth.

Evaluating a Dutch cardiology primary care plus intervention on the Triple Aim outcomes: study design of a practice-based quantitative and qualitative research.

PubMed

Quanjel, Tessa C C; Spreeuwenberg, Marieke D; Struijs, Jeroen N; Baan, Caroline A; Ruwaard, Dirk

2017-09-06

In an attempt to deal with the pressures on the health-care system and to guarantee sustainability, changes are needed. This study focuses on a cardiology primary care plus intervention. Primary care plus (PC+) is a new health-care delivery model focused on substitution of specialist care in the hospital setting with specialist care in the primary care setting. The intervention consists of a cardiology PC+ centre in which cardiologists, supported by other health-care professionals, provide consultations in a primary care setting. The PC+ centre aims to improve the health of the population and quality of care as experienced by patients, and reduce the number of referrals to hospital-based outpatient specialist care in order to reduce health-care costs. These aims reflect the Triple Aim principle. Hence, the objectives of the study are to evaluate the cardiology PC+ centre in terms of the Triple Aim outcomes and to evaluate the process of the introduction of PC+. The study is a practice-based, quantitative study with a longitudinal observational design, and an additional qualitative study to supplement, interpret and improve the quantitative study. The study population of the quantitative part will consist of adult patients (≥18 years) with non-acute and low-complexity cardiology-related health complaints, who will be referred to the cardiology PC+ centre (intervention group) or hospital-based outpatient cardiology care (control group). All eligible patients will be asked to complete questionnaires at three different time points consisting of questions about their demographics, health status and experience of care. Additionally, quantitative data will be collected about health-care utilization and related health-care costs at the PC+ centre and the hospital. The qualitative part, consisting of semi-structured interviews, focus groups, and observations, is designed to evaluate the process as well as to amplify, clarify and explain quantitative results. This study will evaluate a cardiology PC+ centre using quantitative and supplementary qualitative methods. The findings of both sub-studies will fill a gap in knowledge about the effects of PC+ and in particular whether PC+ is able to pursue the Triple Aim outcomes. NTR6629 (Data registered: 25-08-2017) (registered retrospectively).

Response-Order Effects in Survey Methods: A Randomized Controlled Crossover Study in the Context of Sport Injury Prevention.

PubMed

Chan, Derwin K; Ivarsson, Andreas; Stenling, Andreas; Yang, Sophie X; Chatzisarantis, Nikos L; Hagger, Martin S

2015-12-01

Consistency tendency is characterized by the propensity for participants responding to subsequent items in a survey consistent with their responses to previous items. This method effect might contaminate the results of sport psychology surveys using cross-sectional design. We present a randomized controlled crossover study examining the effect of consistency tendency on the motivational pathway (i.e., autonomy support → autonomous motivation → intention) of self-determination theory in the context of sport injury prevention. Athletes from Sweden (N = 341) responded to the survey printed in either low interitem distance (IID; consistency tendency likely) or high IID (consistency tendency suppressed) on two separate occasions, with a one-week interim period. Participants were randomly allocated into two groups, and they received the survey of different IID at each occasion. Bayesian structural equation modeling showed that low IID condition had stronger parameter estimates than high IID condition, but the differences were not statistically significant.

Consistency and malleability of manipulation performance in experienced clinicians: a pre-post experimental design.

PubMed

Triano, John J; Giuliano, Dominic; Kanga, Ismat; Starmer, David; Brazeau, Jennifer; Screaton, C Elaine; Semple, Curtis

2015-01-01

The purpose of this study was to sample the stability of spinal manipulation performance in peak impulse force development over time and the ability of clinicians to adapt to arbitrary target levels with short-duration training. A pre-post experimental design was used. Human analog mannequins provided standardized simulation for performance measures. A convenience sample was recruited consisting of 41 local doctors of chiropractic with 5 years of active clinical practice experience. Thoracic impulse force was measured among clinicians at baseline, after 4 months at pretraining, and again posttraining. Intraclass correlation coefficient values and within-subject variability defined consistency. Malleability was measured by reduction of error (paired t tests) in achieving arbitrary targeted levels of force development normalized to the individual's typical performance. No difference was observed in subgroup vs baseline group characteristics. Good consistency was observed in force-time profiles (0.55 ≤ intraclass correlation coefficient ≤ 0.75) for force parameters over the 4-month interval. With short intervals of focused training, error rates in force delivery were reduced by 23% to 45%, depending on target. Within-subject variability was 1/3 to 1/2 that of between-subject variability. Load increases were directly related to rate of loading. The findings of this study show that recalibration of spinal manipulation performance of experienced clinicians toward arbitrary target values in the thoracic spine is feasible. This study found that experienced clinicians are internally consistent in performance of procedures under standardized conditions and that focused training may help clinicians learn to modulate procedure characteristics. Copyright © 2015 National University of Health Sciences. Published by Elsevier Inc. All rights reserved.

Design and fabrication of a boron reinforced intertank skirt

NASA Technical Reports Server (NTRS)

Henshaw, J.; Roy, P. A.; Pylypetz, P.

1974-01-01

Analytical and experimental studies were performed to evaluate the structural efficiency of a boron reinforced shell, where the medium of reinforcement consists of hollow aluminum extrusions infiltrated with boron epoxy. Studies were completed for the design of a one-half scale minimum weight shell using boron reinforced stringers and boron reinforced rings. Parametric and iterative studies were completed for the design of minimum weight stringers, rings, shells without rings and shells with rings. Computer studies were completed for the final evaluation of a minimum weight shell using highly buckled minimum gage skin. The detail design is described of a practical minimum weight test shell which demonstrates a weight savings of 30% as compared to an all aluminum longitudinal stiffened shell. Sub-element tests were conducted on representative segments of the compression surface at maximum stress and also on segments of the load transfer joint. A 10 foot long, 77 inch diameter shell was fabricated from the design and delivered for further testing.

Behavioral headache research: methodologic considerations and research design alternatives.

PubMed

Hursey, Karl G; Rains, Jeanetta C; Penzien, Donald B; Nash, Justin M; Nicholson, Robert A

2005-05-01

Behavioral headache treatments have garnered solid empirical support in recent years, but there is substantial opportunity to strengthen the next generation of studies with improved methods and consistency across studies. Recently, Guidelines for Trials of Behavioral Treatments for Recurrent Headache were published to facilitate the production of high-quality research. The present article compliments the guidelines with a discussion of methodologic and research design considerations. Since there is no research design that is applicable in every situation, selecting an appropriate research design is fundamental to producing meaningful results. Investigators in behavioral headache and other areas of research consider the developmental phase of the research, the principle objectives of the project, and the sources of error or alternative interpretations in selecting a design. Phases of clinical trials typically include pilot studies, efficacy studies, and effectiveness studies. These trials may be categorized as primarily pragmatic or explanatory. The most appropriate research designs for these different phases and different objectives vary on such characteristics as sample size and assignment to condition, types of control conditions, periods or frequency of measurement, and the dimensions along which comparisons are made. A research design also must fit within constraints on available resources. There are a large number of potential research designs that can be used and considering these characteristics allows selection of appropriate research designs.

Generic aerocapture atmospheric entry study, volume 1

NASA Technical Reports Server (NTRS)

1980-01-01

An atmospheric entry study to fine a generic aerocapture vehicle capable of missions to Mars, Saturn, and Uranus is reported. A single external geometry was developed through atmospheric entry simulations. Aerocapture is a system design concept which uses an aerodynamically controlled atmospheric entry to provide the necessary velocity depletion to capture payloads into planetary orbit. Design concepts are presented which provide the control accuracy required while giving thermal protection for the mission payload. The system design concepts consist of the following elements: (1) an extendable biconic aerodynamic configuration with lift to drag ratio between 1.0 and 2.0; (2) roll control system concepts to control aerodynamic lift and disturbance torques; (3) aeroshell design concepts capable of meeting dynamic pressure loads during aerocapture; and (4) entry thermal protection system design concepts to meet thermodynamic loads during aerocapture.

OTEC riser cable system, Phase II: conceptual design

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

1980-10-01

Studies are summarized of conceptual designs of riser cable systems for OTEC pilot plants of both the spar and plantship configurations located at sites off the southeast coast of Puerto Rico. The studies utilize a baseline pilot plant riser cable, the design of which has been developed and reported on in other reports. Baseline riser cable systems for OTEC pilot plants are identified, system hardware consistent with these designs are conceptualized, and comparisons of the various system concepts are provided. It is concluded that there are three riser cable systems feasible for a spar pilot plant platform at the Puntamore » Yeguas site, and two riser cable systems feasible at the plantship pilot plant at the Punta Tuna site. Recommendations for further investigations in the areas of materials, hardware design and pre-installation site surveys are also addressed.« less

Manufacturing of ArF chromeless hard shifter for 65-nm technology

NASA Astrophysics Data System (ADS)

Park, Keun-Taek; Dieu, Laurent; Hughes, Greg P.; Green, Kent G.; Croffie, Ebo H.; Taravade, Kunal N.

2003-12-01

For logic design, Chrome-less Phase Shift Mask is one of the possible solutions for defining small geometry with low MEF (mask enhancement factor) for the 65nm node. There have been lots of dedicated studies on the PCO (Phase Chrome Off-axis) mask technology and several design approaches have been proposed including grating background, chrome patches (or chrome shield) for applying PCO on line/space and contact pattern. In this paper, we studied the feasibility of grating design for line and contact pattern. The design of the grating pattern was provided from the EM simulation software (TEMPEST) and the aerial image simulation software. AIMS measurements with high NA annular illumination were done. Resist images were taken on designed pattern in different focus. Simulations, AIMS are compared to verify the consistency of the process with wafer printed performance.

Evaluation of modified single seal surface treatments.

DOT National Transportation Integrated Search

1995-01-01

This report describes a field study of a multicourse asphalt emulsion chip seal, designated as a modified single seal. The treatment, already used in North Carolina, consists of an application of emulsion and coarse aggregate followed by another appl...

Improving the power of long term rodent carcinogenicity bioassays by adjusting the experimental design.

PubMed

Jackson, Matthew T

2015-07-01

Since long term rodent carcinogenicity studies are used to test a very large number of potential tumor endpoints, finding a balance between the control of Type 1 and Type 2 error is challenging. As a result, these studies can suffer from very low power to detect effects of regulatory significance. In the present paper, a new design is proposed in order address this problem. This design is a simple modification of the existing standard designs and uses the same number of animals. Where it differs from the currently used designs is that it uses just three treatment groups rather than four, with the animals concentrated in the control and high dose groups, rather than being equally distributed among the groups. This new design is tested, in a pair of simulation studies over a range of scenarios, against two currently used designs, and against a maximally powerful two group design. It consistently performs at levels close to the optimal design, and except in the case of relatively modest effects and very rare tumors, is found to increase power by 10%-20% over the current designs while maintaining or reducing the Type 1 error rate. Published by Elsevier Inc.

A probability model for evaluating the bias and precision of influenza vaccine effectiveness estimates from case-control studies.

PubMed

Haber, M; An, Q; Foppa, I M; Shay, D K; Ferdinands, J M; Orenstein, W A

2015-05-01

As influenza vaccination is now widely recommended, randomized clinical trials are no longer ethical in many populations. Therefore, observational studies on patients seeking medical care for acute respiratory illnesses (ARIs) are a popular option for estimating influenza vaccine effectiveness (VE). We developed a probability model for evaluating and comparing bias and precision of estimates of VE against symptomatic influenza from two commonly used case-control study designs: the test-negative design and the traditional case-control design. We show that when vaccination does not affect the probability of developing non-influenza ARI then VE estimates from test-negative design studies are unbiased even if vaccinees and non-vaccinees have different probabilities of seeking medical care against ARI, as long as the ratio of these probabilities is the same for illnesses resulting from influenza and non-influenza infections. Our numerical results suggest that in general, estimates from the test-negative design have smaller bias compared to estimates from the traditional case-control design as long as the probability of non-influenza ARI is similar among vaccinated and unvaccinated individuals. We did not find consistent differences between the standard errors of the estimates from the two study designs.

Study of Turbofan Engines Designed for Low Enery Consumption

NASA Technical Reports Server (NTRS)

Neitzel, R. E.; Hirschkron, R.; Johnston, R. P.

1976-01-01

Subsonic transport turbofan engine design and technology features which have promise of improving aircraft energy consumption are described. Task I addressed the selection and evaluation of features for the CF6 family of engines in current aircraft, and growth models of these aircraft. Task II involved cycle studies and the evaluation of technology features for advanced technology turbofans, consistent with initial service in 1985. Task III pursued the refined analysis of a specific design of an advanced technology turbofan engine selected as the result of Task II studies. In all of the above, the impact upon aircraft economics, as well as energy consumption, was evaluated. Task IV summarized recommendations for technology developments which would be necessary to achieve the improvements in energy consumption identified.

Risk-taking related to drug use: an application of the shift-to-risk design.

PubMed

Deren, S; Des Jarlais, D C

1977-01-01

The utility of the shift-to-risk design for studying the influence of peer groups on drug taking was investigated. Two studies using this design with drug content were conducted, varying the level of information provided about a drug. Subjects were from two college classes consisting of 26 and 28 students. Results indicated that the specification of possible harmful drug effects which are somewhat minimal lead to a significantly greater willingness to recommend trying the drug. In addition, a tendency for a shift-to-caution was found. It was concluded that the shift-to-risk designwas useful for studying decision-making regarding drug use, and that both users and nonusers of drugs should be included in future research.

A taxometric study of hypochondriasis symptoms.

PubMed

Longley, Susan L; Broman-Fulks, Joshua J; Calamari, John E; Noyes, Russell; Wade, Michael; Orlando, Carissa M

2010-12-01

Hypochondriasis has been conceptualized as both a distinct category that is characterized by a disabling illness preoccupation and as a continuum of health concerns. Empirical support for one of these theoretical models will clarify inconsistent assessment approaches and study designs that have impeded theory and research. To facilitate progress, taxometric analyses were conducted to determine whether hypochondriasis is best understood as a discrete category, consistent with the DSM, or as a dimensional entity, consistent with prevailing opinion and most self-report measures. Data from a large undergraduate sample that completed 3 hypochondriasis symptom measures were factor analyzed. The 4 factor analytically derived symptom indicators were then used in these taxometric analyses. Consistent with our hypotheses and existing theory, results supported a dimensional structure for hypochondriasis. Implications for the conceptualization of hypochondriasis and directions for future study are discussed. Copyright © 2010. Published by Elsevier Ltd.

A Study of Reliability of Marking and Absolute Grading in Secondary Schools

ERIC Educational Resources Information Center

Abdul Gafoor, K.; Jisha, P.

2014-01-01

Using a non-experimental comparative group design in a sample consisting of 100 English teachers randomly selected from 30 secondary schools of a district of Kerala and assigning fifty teachers to groups for marking and grading, this study compares inter and intra-individual reliability in marking and absolute grading. Studying (1) the in marking…

Effects of Mathematics Innovation and Technology on Students Performance in Open and Distance Learning

ERIC Educational Resources Information Center

Israel, Oginni 'Niyi

2016-01-01

This study investigated the effect of mathematics innovation and technology on students' academic performance in open and distance learning. Quasi -- experimental research design was adopted for the study. The population for the study consisted of all the 200 level primary education students at the National Open University of Nigeria (Ekiti and…

Predictors of Behavior Factors of High School Students against Recycling

ERIC Educational Resources Information Center

Cimen, Osman; Yilmaz, Mehmet

2016-01-01

This study aims to determine the variables that predict high school students' recycling behaviors. The study was designed as survey model. The study's sample consists of 203 students at a high school in Ankara. A recycling behavior scale developed by the researchers was used as a data collection tool. The scale has 3 dimensions: recycling…

The Effect of Electronic Dialogue Journaling on Jordanian Basic Stage EFL Students' Writing Performance

ERIC Educational Resources Information Center

El-Koumy, Abdel Salam Abdel Khalek; Mirjan, Zahra' Imad

2008-01-01

This study aimed at investigating the effect of electronic dialogue journaling on Jordanian upper basic stage EFL students' writing performance. The study utilized a pretest-posttest control group experimental design. The subjects of the study consisted of fifty students enrolled in the Islamic Educational School during the first semester of the…

Constructivist Approach Enhances the Learning: A Search of Reality

ERIC Educational Resources Information Center

Dev, Meenu

2016-01-01

The primary aim of the study was to study the effect of constructivist approach of teaching on the learning of English Language on Primary School Students. The study consisted of 60 students of class VI from Janta Brahmi Sr. Secondary School, Nathupur, Sonipat. A single quasi experimental pre-test and post-test design was applied in the present…

Screen Design Principles of Computer-Aided Instructional Software for Elementary School Students

ERIC Educational Resources Information Center

Berrin, Atiker; Turan, Bülent Onur

2017-01-01

This study aims to present primary school students' views about current educational software interfaces, and to propose principles for educational software screens. The study was carried out with a general screening model. Sample group of the study consisted of sixth grade students in Sehit Ögretmen Hasan Akan Elementary School. In this context,…

Online Communication, Compulsive Internet Use, and Psychosocial Well-Being among Adolescents: A Longitudinal Study

ERIC Educational Resources Information Center

van den Eijnden, Regina J. J. M.; Meerkerk, Gert-Jan; Vermulst, Ad A.; Spijkerman, Renske; Engels, Rutger C. M. E.

2008-01-01

The present study investigated the relationships between adolescents' online communication and compulsive Internet use, depression, and loneliness. The study had a 2-wave longitudinal design with an interval of 6 months. The sample consisted of 663 students, 318 male and 345 female, ages 12 to 15 years. Questionnaires were administered in a…

Visual Literacy and the Integration of Parametric Modeling in the Problem-Based Curriculum

ERIC Educational Resources Information Center

Assenmacher, Matthew Benedict

2013-01-01

This quasi-experimental study investigated the application of visual literacy skills in the form of parametric modeling software in relation to traditional forms of sketching. The study included two groups of high school technical design students. The control and experimental groups involved in the study consisted of two randomly selected groups…

The Analysis of Reading Skills and Visual Perception Levels of First Grade Turkish Students

ERIC Educational Resources Information Center

Memis, Aysel; Sivri, Diler Ayvaz

2016-01-01

In this study, primary school first grade students' reading skills and visual perception levels were investigated. Sample of the study, which was designed with relational scanning model, consisted of 168 first grade students studying at three public primary schools in Kozlu, Zonguldak, in 2013-2014 education year. Students' reading level, reading…

Family-Work Conflict and Type-E Personality as Stress Inducers in Married Female Nigerian University Administrators

ERIC Educational Resources Information Center

Shobola, A. A.; Nwoha, P. C.

2013-01-01

This piece of article is culled from a larger study. The study investigated the relationship between family-work conflict, Type-E personality and stress in married female Nigerian University Administrators. The study adopted ex-post facto design. The sample consisted of 800 female administrators in the senior cadre of executive/administrative…

A Case Study on Mathematical Literacy of Prospective Elementary School Teachers

ERIC Educational Resources Information Center

Suharta, I. Gusti Putu; Suarjana, I. Made

2018-01-01

The purpose of this study is to describe Mathematical Literacy (ML) of Prospective Elementary School Teachers with attention to aspects of mathematical skills and gender. The type of research is qualitative with the research design of Case Study. Respondents are assigned 12 Prospective Elementary School Teachers, consisting of 6 men and 6 women.…

Design of a solar concentrator considering arbitrary surfaces

NASA Astrophysics Data System (ADS)

Jiménez-Rodríguez, Martín.; Avendaño-Alejo, Maximino; Verduzco-Grajeda, Lidia Elizabeth; Martínez-Enríquez, Arturo I.; García-Díaz, Reyes; Díaz-Uribe, Rufino

2017-10-01

We study the propagation of light in order to efficiently redirect the reflected light on photocatalytic samples placed inside a commercial solar simulator, and we have designed a small-scale prototype of Cycloidal Collectors (CCs), resembling a compound parabolic collector. The prototype consists of either cycloidal trough or cycloidal collector having symmetry of rotation, which has been designed considering an exact ray tracing assuming a bundle of rays propagating parallel to the optical axis and impinging on a curate cycloidal surface, obtaining its caustic surface produced by reflection.

Evolutionary algorithm for optimization of nonimaging Fresnel lens geometry.

PubMed

Yamada, N; Nishikawa, T

2010-06-21

In this study, an evolutionary algorithm (EA), which consists of genetic and immune algorithms, is introduced to design the optical geometry of a nonimaging Fresnel lens; this lens generates the uniform flux concentration required for a photovoltaic cell. Herein, a design procedure that incorporates a ray-tracing technique in the EA is described, and the validity of the design is demonstrated. The results show that the EA automatically generated a unique geometry of the Fresnel lens; the use of this geometry resulted in better uniform flux concentration with high optical efficiency.

Design of a front-end integrated circuit for 3D acoustic imaging using 2D CMUT arrays.

PubMed

Ciçek, Ihsan; Bozkurt, Ayhan; Karaman, Mustafa

2005-12-01

Integration of front-end electronics with 2D capacitive micromachined ultrasonic transducer (CMUT) arrays has been a challenging issue due to the small element size and large channel count. We present design and verification of a front-end drive-readout integrated circuit for 3D ultrasonic imaging using 2D CMUT arrays. The circuit cell dedicated to a single CMUT array element consists of a high-voltage pulser and a low-noise readout amplifier. To analyze the circuit cell together with the CMUT element, we developed an electrical CMUT model with parameters derived through finite element analysis, and performed both the pre- and postlayout verification. An experimental chip consisting of 4 X 4 array of the designed circuit cells, each cell occupying a 200 X 200 microm2 area, was formed for the initial test studies and scheduled for fabrication in 0.8 microm, 50 V CMOS technology. The designed circuit is suitable for integration with CMUT arrays through flip-chip bonding and the CMUT-on-CMOS process.

Development of a self-report questionnaire designed for population-based surveillance of gingivitis in adolescents: assessment of content validity and reliability.

PubMed

Quiroz, Viviana; Reinero, Daniela; Hernández, Patricia; Contreras, Johanna; Vernal, Rolando; Carvajal, Paola

2017-01-01

This study aimed to develop and assess the content validity and reliability of a cognitively adapted self-report questionnaire designed for surveillance of gingivitis in adolescents. Ten predetermined self-report questions evaluating early signs and symptoms of gingivitis were preliminary assessed by a panel of clinical experts. Eight questions were selected and cognitively tested in 20 adolescents aged 12 to 18 years from Santiago de Chile. The questionnaire was then conducted and answered by 178 Chilean adolescents. Internal consistency was measured using the Cronbach's alpha and temporal stability was calculated using the Kappa-index. A reliable final self-report questionnaire consisting of 5 questions was obtained, with a total Cronbach's alpha of 0.73 and a Kappa-index ranging from 0.41 to 0.77 between the different questions. The proposed questionnaire is reliable, with an acceptable internal consistency and a temporal stability from moderate to substantial, and it is promising for estimating the prevalence of gingivitis in adolescents.

Should students design or interact with models? Using the Bifocal Modelling Framework to investigate model construction in high school science

NASA Astrophysics Data System (ADS)

Fuhrmann, Tamar; Schneider, Bertrand; Blikstein, Paulo

2018-05-01

The Bifocal Modelling Framework (BMF) is an approach for science learning which links students' physical experimentation with computer modelling in real time, focusing on the comparison of the two media. In this paper, we explore how a Bifocal Modelling implementation supported learning outcomes related to both content and metamodeling knowledge, focusing on the role of designing models. Our study consisted of three conditions implemented with a total of 69 9th grade high-school students. The first and second classes were assigned two implementation modes of BMF: with and without a model design module. The third condition, employed as a control, consisted of a class that received instruction in the school's traditional approach. Our results indicate that students participating in both BMF implementations demonstrated improved content knowledge and a better understanding of metamodeling. However, only the 'BMF-with-design' group improved significantly in both content and metamodeling knowledge. Our qualitative analyses indicate that both BMF groups designed detailed models that included scientific explanations. However only students who engaged in the model design component: (1) completed a detailed model displaying molecular interaction; and (2) developed a critical perspective about models. We discuss the implications of those results for teaching scientific science concepts and metamodeling knowledge.

The Importance of Considering Differences in Study Design in Network Meta-analysis: An Application Using Anti-Tumor Necrosis Factor Drugs for Ulcerative Colitis.

PubMed

Cameron, Chris; Ewara, Emmanuel; Wilson, Florence R; Varu, Abhishek; Dyrda, Peter; Hutton, Brian; Ingham, Michael

2017-11-01

Adaptive trial designs present a methodological challenge when performing network meta-analysis (NMA), as data from such adaptive trial designs differ from conventional parallel design randomized controlled trials (RCTs). We aim to illustrate the importance of considering study design when conducting an NMA. Three NMAs comparing anti-tumor necrosis factor drugs for ulcerative colitis were compared and the analyses replicated using Bayesian NMA. The NMA comprised 3 RCTs comparing 4 treatments (adalimumab 40 mg, golimumab 50 mg, golimumab 100 mg, infliximab 5 mg/kg) and placebo. We investigated the impact of incorporating differences in the study design among the 3 RCTs and presented 3 alternative methods on how to convert outcome data derived from one form of adaptive design to more conventional parallel RCTs. Combining RCT results without considering variations in study design resulted in effect estimates that were biased against golimumab. In contrast, using the 3 alternative methods to convert outcome data from one form of adaptive design to a format more consistent with conventional parallel RCTs facilitated more transparent consideration of differences in study design. This approach is more likely to yield appropriate estimates of comparative efficacy when conducting an NMA, which includes treatments that use an alternative study design. RCTs based on adaptive study designs should not be combined with traditional parallel RCT designs in NMA. We have presented potential approaches to convert data from one form of adaptive design to more conventional parallel RCTs to facilitate transparent and less-biased comparisons.

Evaluation of the Professional Development Program on Web Based Content Development

ERIC Educational Resources Information Center

Yurdakul, Bünyamin; Uslu, Öner; Çakar, Esra; Yildiz, Derya G.

2014-01-01

The aim of this study is to evaluate the professional development program on web based content development (WBCD) designed by the Ministry of National Education (MoNE). Based on the theoretical CIPP model by Stufflebeam and Guskey's levels of evaluation, the study was carried out as a case study. The study group consisted of the courses that…

Rights and Responsibilities of Teachers and Parents as School Citizens: A Qualitative Study Based on Organizational Citizenship

ERIC Educational Resources Information Center

Yaylaci, Ali Faruk

2016-01-01

This study intends to explore the perspectives of school administrators, teachers, and parents on the rights and responsibilities of teachers and parents in terms of organizational citizenship. The study was designed as a qualitative research. The study group consisted of 95 participants in total (20 school administrators, 20 teachers, 15 parents,…

Overview of Germany: The Federal Republic and the Federal States. Social Studies, Grades 6-8. Update 2002.

ERIC Educational Resources Information Center

Blankenship, Glen; Tinkler, D. William

This instructional package, consisting of a text and 15 transparencies, is designed for middle school classrooms. The four lessons in the package correlate to the study of world cultures (perspective taking and symbols), geography, and government. The materials in the package focus on national studies and state studies from a comparative United…

Stakeholders' Perception on Teachers' Assessment Effectiveness in Secondary Schools in Port Harcourt Metropolis in Rivers State

ERIC Educational Resources Information Center

Ogidi, Reuben C.; Udechukwu, Jonathan O.

2017-01-01

The study sought to investigate the perception of stakeholders on teachers' assessment effectiveness in secondary schools in Port Harcourt Metropolis in Rivers State. Three research questions and one hypothesis were formulated to guide the study. The study adopted survey research design. The sample of the study consisted of 20 principles, 30 vice…

The Investigation of Science Process Skills of Science Teachers in Terms of Some Variables

ERIC Educational Resources Information Center

Aydogdu, Bülent

2015-01-01

This study aimed to investigate basic process skills, integrated process skills and overall science process skills of science teachers in terms of some variables. This study had a survey design. The study population consisted of 170 science teachers from a province located in the Central Anatolia Region of Turkey. The study data were obtained from…

Utilizing the National Research Council's (NRC) Conceptual Framework for the Next Generation Science Standards (NGSS): A Self-Study in My Science, Engineering, and Mathematics Classroom

NASA Astrophysics Data System (ADS)

Corvo, Arthur Francis

Given the reality that active and competitive participation in the 21 st century requires American students to deepen their scientific and mathematical knowledge base, the National Research Council (NRC) proposed a new conceptual framework for K--12 science education. The framework consists of an integration of what the NRC report refers to as the three dimensions: scientific and engineering practices, crosscutting concepts, and core ideas in four disciplinary areas (physical, life and earth/spaces sciences, and engineering/technology). The Next Generation Science Standards (NGSS ), which are derived from this new framework, were released in April 2013 and have implications on teacher learning and development in Science, Technology, Engineering, and Mathematics (STEM). Given the NGSS's recent introduction, there is little research on how teachers can prepare for its release. To meet this research need, I implemented a self-study aimed at examining my teaching practices and classroom outcomes through the lens of the NRC's conceptual framework and the NGSS. The self-study employed design-based research (DBR) methods to investigate what happened in my secondary classroom when I designed, enacted, and reflected on units of study for my science, engineering, and mathematics classes. I utilized various best practices including Learning for Use (LfU) and Understanding by Design (UbD) models for instructional design, talk moves as a tool for promoting discourse, and modeling instruction for these designed units of study. The DBR strategy was chosen to promote reflective cycles, which are consistent with and in support of the self-study framework. A multiple case, mixed-methods approach was used for data collection and analysis. The findings in the study are reported by study phase in terms of unit planning, unit enactment, and unit reflection. The findings have implications for science teaching, teacher professional development, and teacher education.

Effects of consistent food presentation on efficiency of eating and nutritive value of food consumed by children with severe neurological impairment.

PubMed

Pinnington, L; Hegarty, J

1999-01-01

The purpose of this investigation was to determine what implications consistent presentation of food, delivered by an assistive feeding device at a position regarded as optimal, would have for the maintenance of food intake, duration of meals, and efficiency of eating. The trial employed an AB within-subjects design and extended over a 9-month period. Twenty children, aged 7 to 17 years, with severe neurological impairment and associated eating difficulties, were studied. The effects of the intervention were compared by examination of diaries recording the sizes and composition of meals consumed during designated periods and by precautionary measures of growth and weight. Although no statistically significant changes in weight were recorded overall, meals presented consistently were consumed less efficiently and sometimes more slowly than were standard ones, where food was presented by hand. However, no change occurred in the amount of energy and protein consumed, which suggested that the children's ability to thrive was neither improved nor further compromised by participation in the study. The findings have implications for the way in which children are assisted during mealtimes by their caregivers.

Systematic design of membership functions for fuzzy-logic control: A case study on one-stage partial nitritation/anammox treatment systems.

PubMed

Boiocchi, Riccardo; Gernaey, Krist V; Sin, Gürkan

2016-10-01

A methodology is developed to systematically design the membership functions of fuzzy-logic controllers for multivariable systems. The methodology consists of a systematic derivation of the critical points of the membership functions as a function of predefined control objectives. Several constrained optimization problems corresponding to different qualitative operation states of the system are defined and solved to identify, in a consistent manner, the critical points of the membership functions for the input variables. The consistently identified critical points, together with the linguistic rules, determine the long term reachability of the control objectives by the fuzzy logic controller. The methodology is highlighted using a single-stage side-stream partial nitritation/Anammox reactor as a case study. As a result, a new fuzzy-logic controller for high and stable total nitrogen removal efficiency is designed. Rigorous simulations are carried out to evaluate and benchmark the performance of the controller. The results demonstrate that the novel control strategy is capable of rejecting the long-term influent disturbances, and can achieve a stable and high TN removal efficiency. Additionally, the controller was tested, and showed robustness, against measurement noise levels typical for wastewater sensors. A feedforward-feedback configuration using the present controller would give even better performance. In comparison, a previously developed fuzzy-logic controller using merely expert and intuitive knowledge performed worse. This proved the importance of using a systematic methodology for the derivation of the membership functions for multivariable systems. These results are promising for future applications of the controller in real full-scale plants. Furthermore, the methodology can be used as a tool to help systematically design fuzzy logic control applications for other biological processes. Copyright © 2016 Elsevier Ltd. All rights reserved.

Development of a method of alignment between various SOLAR MAXIMUM MISSION experiments

NASA Technical Reports Server (NTRS)

1977-01-01

Results of an engineering study of the methods of alignment between various experiments for the solar maximum mission are described. The configuration studied consists of the instruments, mounts and instrument support platform located within the experiment module. Hardware design, fabrication methods and alignment techniques were studied with regard to optimizing the coalignment between the experiments and the fine sun sensor. The proposed hardware design was reviewed with regard to loads, stress, thermal distortion, alignment error budgets, fabrication techniques, alignment techniques and producibility. Methods of achieving comparable alignment accuracies on previous projects were also reviewed.

Conceptual design study of a nuclear Brayton turboalternator-compressor

NASA Technical Reports Server (NTRS)

1971-01-01

A comprehensive analysis and conceptual design study of the turboalternator-compressor components using HeXe as the working fluid was performed. The study was conducted in three phases: general configuration analysis (Phase 1), design variations (Phase 2), and conceptual design study (Phase 3). During the Phase 1 analysis, individual turbine, alternator, compressor, and bearing and seal designs were evaluated. Six turboalternator-compressor (TAC) configurations were completed. Phase 2 consisted of evaluating one selected Phase 1 TAC configuration to calculate its performance when operating under new cycle conditions, namely, one higher and one lower turbine inlet temperature and one case with krypton as the working fluid. Based on the Phase 1 and 2 results, a TAC configuration that incorporated a radial compressor, a radial turbine, a Lundell alternator, and gas bearings was selected. During Phase 3 a new layout of the TAC was prepared that reflects the cycle state points necessary to accommodate a zirconium hydride moderated reactor and a 400 Hz alternator. The final TAC design rotates at 24,000 rpm and produces 160 kWe, 480 V, 3-phase, 400 hertz power.

Earth Observatory Satellite system definition study. Report no. 3: Design/cost tradeoff studies. Appendix C: EOS program requirements document

NASA Technical Reports Server (NTRS)

1974-01-01

An analysis of the requirements for the Earth Observatory Satellite (EOS) system specifications is presented. The analysis consists of requirements obtained from existing documentation and those derived from functional analysis. The requirements follow the hierarchy of program, mission, system, and subsystem. The code for designating specific requirements is explained. Among the subjects considered are the following: (1) the traffic model, (2) space shuttle related performance, (3) booster related performance, (4) the data collection system, (5) spacecraft structural tests, and (6) the ground support requirements.

The Development, Description and Appraisal of an Emergent Multimethod Research Design to Study Workforce Changes in Integrated Care Interventions.

PubMed

Busetto, Loraine; Luijkx, Katrien; Calciolari, Stefano; González-Ortiz, Laura G; Vrijhoef, Hubertus J M

2017-03-08

In this paper, we provide a detailed and explicit description of the processes and decisions underlying and shaping the emergent multimethod research design of our study on workforce changes in integrated chronic care. The study was originally planned as mixed method research consisting of a preliminary literature review and quantitative check of these findings via a Delphi panel. However, when the findings of the literature review were not appropriate for quantitative confirmation, we chose to continue our qualitative exploration of the topic via qualitative questionnaires and secondary analysis of two best practice case reports. The resulting research design is schematically described as an emergent and interactive multimethod design with multiphase combination timing. In doing so, we provide other researchers with a set of theory- and experience-based options to develop their own multimethod research and provide an example for more detailed and structured reporting of emergent designs. We argue that the terminology developed for the description of mixed methods designs should also be used for multimethod designs such as the one presented here.

Rock ramp design guidelines

USGS Publications Warehouse

Mooney, David M.; Holmquist-Johnson, Christopher L.; Broderick, Susan

2007-01-01

Rock ramps or roughened channels consist of steep reaches stabilized by large immobile material (riprap). Primary objectives for rock ramps include: Create adequate head for diversionMaintain fish passage during low-flow conditionsMaintain hydraulic conveyance during high-flow conditionsSecondary objectives for rock ramp design include:Emulate natural systemsMinimize costsThe rock ramp consists of a low-flow channel designed to maintain biologically adequate depth and velocity conditions during periods of small discharges. The remainder of the ramp is designed to withstand and pass large flows with minimal structural damage. The following chapters outline a process for designing rock ramps.

The Opinions of Masters Students about the Learning Program in the Field of Teaching Turkish to Foreigners

ERIC Educational Resources Information Center

Kilinç, Hasan Huseyin

2015-01-01

The purpose of this study is to determine the opinions of Master students about the learning program in the field of teaching Turkish to foreigners. In the study, case study design which is one of the qualitative research methods was used. The population of the study consists of students studying in the Master program with thesis of Teaching…

Out of School Learning Environments in Social Studies Education: A Phenomenological Research with Teacher Candidates

ERIC Educational Resources Information Center

Topçu, Ersin

2017-01-01

In this study, it was aimed to determine the remarks of teacher candidates on the place and importance of out of school learning environments in Social Studies education. Phenomenological method, which is one of the qualitative research designs, was used in this study. The work group of the study consists of 73 teacher candidates who conduct out…

Study of crash energy absorption characteristics of inversion tube on passenger vehicle

NASA Astrophysics Data System (ADS)

Liu, Jiandong; Liu, Tao; Yao, Shengjie; Zhao, Rutao

2017-09-01

This article studied the energy absorption characteristics of the inversion tube and acquired the inversion tube design key dimensions under theoretical conditions by performing formula derivation in the quasi-static and dynamic state based on the working principle of the inversion tube: free inversion. The article further adopted HyperMesh and LS-Dyna to perform simulation and compared the simulation result with the theoretical calculating value for comparison. The design was applied in the full-vehicle model to perform 50km/h front fullwidth crash simulation. The findings showed that the deformation mode of the inversion tube in the full-vehicle crash was consistent with the design mode, and the inversion tube absorbed 33.0% of total energy, thereby conforming to the vehicle safety design requirements.

Does the microbiome and virome contribute to myalgic encephalomyelitis/chronic fatigue syndrome?

PubMed

Newberry, Fiona; Hsieh, Shen-Yuan; Wileman, Tom; Carding, Simon R

2018-03-15

Myalgic encephalomyelitis (ME)/chronic fatigue syndrome (CFS) (ME/CFS) is a disabling and debilitating disease of unknown aetiology. It is a heterogeneous disease characterized by various inflammatory, immune, viral, neurological and endocrine symptoms. Several microbiome studies have described alterations in the bacterial component of the microbiome (dysbiosis) consistent with a possible role in disease development. However, in focusing on the bacterial components of the microbiome, these studies have neglected the viral constituent known as the virome. Viruses, particularly those infecting bacteria (bacteriophages), have the potential to alter the function and structure of the microbiome via gene transfer and host lysis. Viral-induced microbiome changes can directly and indirectly influence host health and disease. The contribution of viruses towards disease pathogenesis is therefore an important area for research in ME/CFS. Recent advancements in sequencing technology and bioinformatics now allow more comprehensive and inclusive investigations of human microbiomes. However, as the number of microbiome studies increases, the need for greater consistency in study design and analysis also increases. Comparisons between different ME/CFS microbiome studies are difficult because of differences in patient selection and diagnosis criteria, sample processing, genome sequencing and downstream bioinformatics analysis. It is therefore important that microbiome studies adopt robust, reproducible and consistent study design to enable more reliable and valid comparisons and conclusions to be made between studies. This article provides a comprehensive review of the current evidence supporting microbiome alterations in ME/CFS patients. Additionally, the pitfalls and challenges associated with microbiome studies are discussed. © 2018 The Author(s).

Design and test of a four channel motor for electromechanical flight control actuation

NASA Technical Reports Server (NTRS)

1984-01-01

To provide a suitable electromagnetic torque summing approach to flight control system redundancy, a four channel motor capable of sustaining full performance after any two credible failures was designed, fabricated, and tested. The design consists of a single samarium cobalt permanent magnet rotor with four separate three phase windings arrayed in individual stator quadrants around the periphery. Trade studies established the sensitivities of weight and performance to such parameters as design speed, winding pattern, number of poles, magnet configuration, and strength. The motor electromagnetically sums the torque of the individual channels on a single rotor and eliminate complex mechanical gearing arrangements.

PFERD Mission: Pluto Flyby Exploration/Research Design

NASA Technical Reports Server (NTRS)

Lemke, Gary; Zayed, Husni; Herring, Jason; Fuehne, Doug; Sutton, Kevin; Sharkey, Mike

1990-01-01

The Pluto Flyby Exploration/Research Design (PFERD) mission will consist of a flyby spacecraft to Pluto and its satellite, Charon. The mission lifetime is expected to be 18 years. The Titan 4 with a Centaur upper stage will be utilized to launch the craft into the transfer orbit. The proposal was divided into six main subsystems: (1) scientific instrumentation; (2) command, communications, and control: (3) altitude and articulation control; (4) power and propulsion; (5) structures and thermal control; and (6) mission management and costing. Tradeoff studies were performed to optimize all factors of design, including survivability, performance, cost, and weight. Problems encountered in the design are also presented.

Revalidation of the Huygens Descent Control Sub-System

NASA Technical Reports Server (NTRS)

2005-01-01

The Huygens probe, part of the Cassini mission to Saturn, is designed to investigate the atmosphere of Titan, Saturn's largest moon. The passage of the probe through the atmosphere is controlled by the Descent Control Sub-System (DCSS), which consists of three parachutes and associated mechanisms. The Cassini / Huygens mission was launched in October 1997 and was designed during the early 1990's. During the time since the design and launch, analysis capabilities have improved significantly, knowledge of the Titan environment has improved and the baseline mission has been modified. Consequently, a study was performed to revalidate the DCSS design against the current predictions.

Exploring the Relationship between School Principals' Burnout Situation and Life Satisfaction

ERIC Educational Resources Information Center

Karakose, Turgut; Kocabas, Ibrahim; Yirci, Ramazan; Esen, Coskun; Celik, Mustafa

2016-01-01

The purpose of this study is to explore school administrations' burnout situation and life satisfaction levels and the relationship between burnout and life satisfaction. The study was designed with the screening model. The research sample consists of 92 school principals and vice principals. Research data was collected with "Maslach Burnout…

An Associational Model for the Diffusion of Complex Innovations.

ERIC Educational Resources Information Center

Barnett, George A.

A paradigm for the study of the diffusion of complex innovations through a society is presented in this paper; the paradigm is useful for studying sociocultural change as innovations diffuse. The model is designed to account for change within social systems rather than in individuals, although it would also be consistent with information…

Native Chinese-Speaking K-12 Language Teachers' Beliefs and Practices

ERIC Educational Resources Information Center

Lü, Chan; Lavadenz, Magaly

2014-01-01

This study investigated the relationships between the beliefs and practices of K-12 native Chinese teachers on Chinese language and literacy instruction. Using a descriptive-exploratory design, this study employed a mixed-methods approach consisting of three steps: (1) a teacher beliefs questionnaire, (2) classroom observations and videotaping,…

The Relationship between Psychological Symptoms, Creativity, and Loneliness in Gifted Children

ERIC Educational Resources Information Center

Ogurlu, Uzeyir; Yalin, Hatun Sevgi; Yavuz Birben, Fazilet

2018-01-01

The aim of this study was to examine the relationship between psychological symptoms, creativity, and loneliness among gifted middle school students and to analyze gender difference in psychological symptoms. The study used a correlational design, consisting of 91 gifted middle school students. The Brief Symptom Inventory, the University of…

The Efficacy of Problem-Based Learning in an Instrumental Analyse Laboratory

ERIC Educational Resources Information Center

Seyhan, Hatice Güngör

2016-01-01

In the context of the study, an instrumental analysis laboratory course offering Problem-Based Learning (PBL) was designed as an alternative to traditional laboratory practices. The study was conducted with a total of 36 volunteer, prospective chemistry teachers consisting of fourth year undergraduates and graduates. While PBL activities were…

Instructional Strategies to Support Creativity and Innovation in Education

ERIC Educational Resources Information Center

Seechaliao, Thapanee

2017-01-01

The purpose of the study focused on the instructional strategies that support creation of creative and innovative education. The sample for this study consisted of 11 experts in the field of instructional strategies that support innovation of education. Among them, five were specialists in design and development of teaching and learning, three…

A 20-Year Examination of the Perceptions of Business School Interns: A Longitudinal Case Study

ERIC Educational Resources Information Center

Cook, Sherry James; Stokes, Amy; Parker, Richard Stephen

2015-01-01

The authors examined students' attitudes toward specific elements of an ongoing internship program. The study sample consisted of 816 student interns from 25 different colleges and universities. Results indicate that despite significant changes in instructional design and the incorporation of new technologies into the learning environment,…

Introduction to Social Psychology: Administrative Manual [And] Student Manual [And] Unit Study Guide.

ERIC Educational Resources Information Center

Rankin, Robert E.

This learning package is a three-semester-hour, independent-study course in social psychology designed for postsecondary, external degree students. Keyed to the commercially published textbook "Social Psychology: Explorations in Understanding" (Del Mar, CA: CRM, 1974), the package consists of an administrator manual, a student manual, and a…

Identification of Preschool Children with Emotional Problems.

ERIC Educational Resources Information Center

Stern, Carolyn; And Others

A large-scale study was designed to assess the extent of emotional disturbance among Head Start children and to provide a consistent basis for selection if therapeutic intervention were indicated. The study's aim was to avoid the problem of shifting baselines by individual teachers for determining the degree to which their children were departing…

A Study of Leadership Effectiveness in a Large VET Institution in Australia

ERIC Educational Resources Information Center

Adams, Don; Gamage, David T.

2008-01-01

Purpose: This paper aims to focus on a study of the effectiveness of head teacher leadership within TAFE NSW. Design/methodology/approach: Quantitative and qualitative methods were employed to identify and measure the effective leadership attributes of the head teachers. The research sample consisted of head teachers and teachers. Findings: The…

Preschool Teachers' Perceived Math Anxiety and Self-Efficacy for Teaching Mathematics

ERIC Educational Resources Information Center

Cook, Carolyn D.

2017-01-01

This study explored the relationship between math anxiety and perceived self-efficacy for teaching mathematics in preschool teachers. Perceptions of and attributions for the teachers' perceived math anxiety and perceived self-efficacy for teaching mathematics were also explored. The study employed a mixed-method design consisting of both…

Problem Solving Strategies of Selected Pre-Service Secondary School Mathematics Teachers in Malaysia

ERIC Educational Resources Information Center

Yew, Wun Theam; Zamri, Sharifah Norul Akmar Syed

2016-01-01

Problem solving strategies of eight pre-service secondary school mathematics teachers (PSSMTs) were examined in this study. A case study research design was employed and clinical interview technique was used to collect the data. Materials collected for analysis consisted of audiotapes and videotapes of clinical interviews, subjects' notes and…

Evaluation Criteria for Competency-Based Syllabi: A Chilean Case Study Applying Mixed Methods

ERIC Educational Resources Information Center

Jerez, Oscar; Valenzuela, Leslier; Pizarro, Veronica; Hasbun, Beatriz; Valenzuela, Gabriela; Orsini, Cesar

2016-01-01

In recent decades, higher education institutions worldwide have been moving from knowledge-based to competence-based curricula. One of the greatest challenges in this transition is the difficulty in changing the knowledge-oriented practices of teachers. This study evaluates the consistency between syllabus design and the requirements imposed by a…

U.S.-MEXICO BORDER PROGRAM ARIZONA BORDER STUDY--STANDARD OPERATING PROCEDURE FOR ASSURANCE OF RESPONDENT CONFIDENTIALITY (UA-G-3.1)

EPA Science Inventory

The purpose of this SOP is to design respondent privacy and confidentiality for all participants of the Arizona Border Study. This SOP covers verbal, written and electronic data references to respondents. This procedure was followed to ensure consistent data retrieval during th...

Self-Awareness of the Male Sexual Response after Spinal Cord Injury

ERIC Educational Resources Information Center

Cardoso, Fernando Luiz; Savall, Ana Carolina R.; Mendes, Aline K.

2009-01-01

The aim of this study was to assess the impact of spinal cord injury on men's sexual motivation, through the sexual desire self-assessment, and the sexual arousal and orgasm physiological responses. This research consisted of a descriptive, nonprobabilistic and comparative study, designed to outline the target population characteristics to compare…

Teaching Iranian Elementary EFL Learners to Say "No" Politely: An Interlanguage Pragmatic Study

ERIC Educational Resources Information Center

Sa'd, Seyyed Hatam Tamimi; Gholami, Javad

2017-01-01

This quasi-experimental study adopted a pretest/posttest design to investigate the effect of instructional intervention in teaching polite refusal strategies explicitly on Iranian EFL learners' performance of the speech act of refusing. The participants, consisting of 24 male elementary EFL learners aged 12-18, responded to a discourse completion…

A Case Study Framework for Community College Leaders

ERIC Educational Resources Information Center

Nevarez, Carlos; Wood, J. Luke

2012-01-01

This article examines a case study framework designed to aid in the preparation of emerging community college leaders. The framework is multidimensional and fluid in nature, taking into account the multiplicity of factors affecting leadership in community colleges. The steps in the framework consist of (a) assuming the role of the leader; (b)…

Science and Technology Teachers' Attitudes towards Educational Research in Turkey

ERIC Educational Resources Information Center

Sekerci, Ali Riza; Ilhan, Nail; Mustafa, Sozbilir; Yildirim, Ali

2017-01-01

This study reports on the attitudes of science and technology teachers' towards educational research that were investigated and analyzed with respect to certain demographic variables. The survey method was utilized as the research design. The study group consisted of 918 science and technology teachers working in middle schools in the Eastern…

Effectiveness of Case-Based Learning Instruction on Epistemological Beliefs and Attitudes toward Chemistry

ERIC Educational Resources Information Center

Cam, Aylin; Geban, Omer

2011-01-01

The purpose of the study was to investigate the effectiveness of case-based learning instruction over traditionally designed chemistry instruction on eleventh grade students' epistemological beliefs and their attitudes toward chemistry as a school subject. The subjects of this study consisted of 63 eleventh grade students from two intact classes…

Breathing Life into Engineering: A Lesson Study Life Science Lesson

ERIC Educational Resources Information Center

Lawrence, Maria; Yang, Li-Ling; Briggs, May; Hession, Alicia; Koussa, Anita; Wagoner, Lisa

2016-01-01

A fifth grade life science lesson was implemented through a lesson study approach in two fifth grade classrooms. The research lesson was designed by a team of four elementary school teachers with the goal of emphasizing engineering practices consistent with the "Next Generation Science Standards" (NGSS) (Achieve Inc. 2013). The fifth…

Photovoice as an Evaluation Tool for Student Learning on a Field Trip

ERIC Educational Resources Information Center

Behrendt, Marc; Machtmes, Krisanna

2016-01-01

Background: Photovoice is one method that enables an educator to view an experience from a student's perspective. This study examined how teachers might use photovoice during an informal learning experience to understand the students' experiences and experiential gain. Design and methods: Participants in this study consisted of six students, three…

Effectiveness of a Solution-Based Counseling on Students' Self-Perception

ERIC Educational Resources Information Center

Joker, Habib; Ghaderi, Zahra

2015-01-01

The purpose of this study was to evaluate the effectiveness of solution-based counseling to increase students' self-conception. Method of research was semi-experimental with pretest and posttest design with a control group. The study sample consisted of all high school students in Dashtestan city, Bushkan district for which 30 subjects were…

Reasons for University Students' Violence in Jordan

ERIC Educational Resources Information Center

Alshoraty, Yazid Isa

2015-01-01

The aim of this study was to examine the reasons for students' violence at Jordanian Universities from the viewpoint of the Hashemite University students. The sample consisted of 521 male and female students, chosen randomly. To collect data, the researcher designed a three-domain questionnaire. The findings of the study revealed that the most…

Watching the TV Audience.

ERIC Educational Resources Information Center

Collett, Peter

Data were collected for this study of the relationship between television watching and family life via a recording device (C-Box) consisting of a television set and a video camera. Designed for the study, this device was installed in 20 homes for one week to record the viewing area in front of the television set together with information on…

"Turn that Thing off!" Parent and Adolescent Predictors of Proactive Media Monitoring

ERIC Educational Resources Information Center

Padilla-Walker, Laura M.; Coyne, Sarah M.

2011-01-01

Though much research has focused on the positive outcomes of parents' monitoring of adolescents' media use, few studies have examined predictors of parents' media monitoring. Accordingly, the current study was designed to assess both parent and child predictors of proactive media monitoring during adolescence. Participants consisted of 478…

Psychological Help-Seeking Attitudes of Helping Professional Candidates and Factors Influencing Them

ERIC Educational Resources Information Center

Kumcagiz, Hatice

2013-01-01

This study was designed as descriptive to identify psychological help-seeking attitudes of helping professional candidates and factors influencing them. The research population consisted of 447 first and fourth grade students studying in the Departments of Psychological Counselling and Guidance, Psychology or Nursing at Ondokuz Mayis University.…

Implementation of Cooperative Learning Model in Preschool

ERIC Educational Resources Information Center

Akçay, Nilüfer Okur

2016-01-01

In this study, the effectivity of jigsaw method, one of the cooperative learning models, on teaching the concepts related to sense organs and their functions to four-five year-old children in nursery class was analyzed. The study is in the semi-experimental design consisting of experimental and control groups and pretest and posttest. The sample…

Effectiveness of Conceptual Change Instruction on Understanding of Heat and Temperature Concepts

ERIC Educational Resources Information Center

Baser, Mustafa; Geban, Omer

2007-01-01

This study investigated the differential effects of two modes of instructional program (conceptual change oriented and traditionally designed) and gender difference on students' understanding of heat and temperature concepts, and their attitudes toward science as a school subject. The subjects of this study consisted of 72 seventh grade students…

A Graduate-Level Survey of Futures Studies: A Curriculum Development Project. Final Report.

ERIC Educational Resources Information Center

Miller, David C.; Hunt, Ronald L.

An introductory graduate level course curriculum for Futures Studies was conceived, designed, and tested within the Cybernetic Systems Program and the Instructional Technology Department, School of Education, California State University, San Jose. The curriculum consists of a series of 15 learning modules including 2 devoted to a standard study…

Influence of Social Media on Psychosocial Behaviour and Academic Performance of Secondary School Students

ERIC Educational Resources Information Center

Umar, Talatu Ibrahim; Idris, Murja

2018-01-01

This study investigated the influence of social media on psychosocial behaviour and academic performance of secondary school students. It was conducted in Batagarawa Local Government, Katsina State, Nigeria. Two research hypotheses were formulated for the study, and descriptive survey research design was employed. The target population consists of…

Critical Thinking Dispositions of Pre-Service Turkish Language Teachers and Primary Teachers

ERIC Educational Resources Information Center

Maltepe, Sadet

2016-01-01

The present study aimed to determine critical thinking dispositions of pre-service Turkish language and primary teachers in terms of several variables by employing descriptive survey design. The study group consisted of 215 senior students attending Turkish Language Teaching and Primary Education Departments of Necatibey Faculty of Education at…

User Studies: Developing Learning Strategy Tool Software for Children.

ERIC Educational Resources Information Center

Fitzgerald, Gail E.; Koury, Kevin A.; Peng, Hsinyi

This paper is a report of user studies for developing learning strategy tool software for children. The prototype software demonstrated is designed for children with learning and behavioral disabilities. The tools consist of easy-to-use templates for creating organizational, memory, and learning approach guides for use in classrooms and at home.…

Factors Associated with Job Content Plateauing among Older Workers

ERIC Educational Resources Information Center

Armstrong-Stassen, Marjorie

2008-01-01

Purpose: The purpose of this paper is to identify personal and work environment factors associated with the experience of job content plateauing among older workers. Design/methodology/approach: Two cross-sectional studies, each including two samples, were conducted. In each study, one sample consisted of a diverse group of older workers and the…

Internet Addiction among Adolescence

ERIC Educational Resources Information Center

Sargin, Nurten

2012-01-01

Each innovation brings along many risks. One of the risks related with the Internet use is Internet addiction. The aim of this study is to examine Internet addiction in adolescence in terms of gender, Internet access at home and grades. The research design used was survey method. The study population consisted of second stage students attending…

A Culturally Enhanced Smoking Cessation Study among Chinese and Korean Smokers

ERIC Educational Resources Information Center

Ma, Grace X.; Fang, Carolyn; Shive, Steven E.; Su, Xuefen; Toubbeh, Jamil I.; Miller, Suzanne; Tan, Yin

2005-01-01

This study assessed the feasibility of and presents preliminary findings on a culturally enhanced, theory-driven smoking cessation intervention for adult Chinese and Korean smokers. A one-group pre-post test design was used. The intervention consisted of behavioral and nicotine replacement strategies. Participants (N=43) were recruited through…

32 CFR 644.83 - Negotiations.

Code of Federal Regulations, 2012 CFR

2012-07-01

... the time of purchase. Therefore, in the negotiation for the purchase of land, an approved current... should study the background data of the project, consisting of the authorizing act, survey report, project document, design memoranda, etc.; the applicable appraisal reports; tract ownership data...

32 CFR 644.83 - Negotiations.

Code of Federal Regulations, 2011 CFR

2011-07-01

... the time of purchase. Therefore, in the negotiation for the purchase of land, an approved current... should study the background data of the project, consisting of the authorizing act, survey report, project document, design memoranda, etc.; the applicable appraisal reports; tract ownership data...

32 CFR 644.83 - Negotiations.

Code of Federal Regulations, 2014 CFR

2014-07-01

... the time of purchase. Therefore, in the negotiation for the purchase of land, an approved current... should study the background data of the project, consisting of the authorizing act, survey report, project document, design memoranda, etc.; the applicable appraisal reports; tract ownership data...

32 CFR 644.83 - Negotiations.

Code of Federal Regulations, 2013 CFR

2013-07-01

... the time of purchase. Therefore, in the negotiation for the purchase of land, an approved current... should study the background data of the project, consisting of the authorizing act, survey report, project document, design memoranda, etc.; the applicable appraisal reports; tract ownership data...

32 CFR 644.83 - Negotiations.

Code of Federal Regulations, 2010 CFR

2010-07-01

... the time of purchase. Therefore, in the negotiation for the purchase of land, an approved current... should study the background data of the project, consisting of the authorizing act, survey report, project document, design memoranda, etc.; the applicable appraisal reports; tract ownership data...

Safer bridge railings, volume 1 summary report.

DOT National Transportation Integrated Search

1984-06-01

This study consisted of strength analyses of five in-service bridge railing systems, thirty full-scale vehicle crash tests on those railing systems and on a load measuring wall, the development of recommended design guidelines and deve1opment of reco...

Adjoint acceleration of Monte Carlo simulations using TORT/MCNP coupling approach: a case study on the shielding improvement for the cyclotron room of the Buddhist Tzu Chi General Hospital.

PubMed

Sheu, R J; Sheu, R D; Jiang, S H; Kao, C H

2005-01-01

Full-scale Monte Carlo simulations of the cyclotron room of the Buddhist Tzu Chi General Hospital were carried out to improve the original inadequate maze design. Variance reduction techniques are indispensable in this study to facilitate the simulations for testing a variety of configurations of shielding modification. The TORT/MCNP manual coupling approach based on the Consistent Adjoint Driven Importance Sampling (CADIS) methodology has been used throughout this study. The CADIS utilises the source and transport biasing in a consistent manner. With this method, the computational efficiency was increased significantly by more than two orders of magnitude and the statistical convergence was also improved compared to the unbiased Monte Carlo run. This paper describes the shielding problem encountered, the procedure for coupling the TORT and MCNP codes to accelerate the calculations and the calculation results for the original and improved shielding designs. In order to verify the calculation results and seek additional accelerations, sensitivity studies on the space-dependent and energy-dependent parameters were also conducted.

Hot conditioning equipment conceptual design report

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bradshaw, F.W., Westinghouse Hanford

1996-08-06

This report documents the conceptual design of the Hot Conditioning System Equipment. The Hot conditioning System will consist of two separate designs: the Hot Conditioning System Equipment; and the Hot Conditioning System Annex. The Hot Conditioning System Equipment Design includes the equipment such as ovens, vacuum pumps, inert gas delivery systems, etc.necessary to condition spent nuclear fuel currently in storage in the K Basins of the Hanford Site. The Hot Conditioning System Annex consists of the facility of house the Hot Conditioning System. The Hot Conditioning System will be housed in an annex to the Canister Storage Building. The Hotmore » Conditioning System will consist of pits in the floor which contain ovens in which the spent nuclear will be conditioned prior to interim storage.« less

Picking Up Artifacts: Storyboarding as a Gateway to Reuse

NASA Astrophysics Data System (ADS)

Wahid, Shahtab; Branham, Stacy M.; Cairco, Lauren; McCrickard, D. Scott; Harrison, Steve

Storyboarding offers designers the opportunity to illustrate a visual narrative of use. Because designers often refer to past ideas, we argue storyboards can be constructed by reusing shared artifacts. We present a study in which we explore how designers reuse artifacts consisting of images and rationale during storyboard construction. We find images can aid in accessing rationale and that connections among features aid in deciding what to reuse, creating new artifacts, and constructing. Based on requirements derived from our findings, we present a storyboarding tool, PIC-UP, to facilitate artifact sharing and reuse and evaluate its use in an exploratory study. We conclude with remarks on facilitating reuse and future work.

Design of a modular digital computer system, CDRL no. D001, final design plan

NASA Technical Reports Server (NTRS)

Easton, R. A.

1975-01-01

The engineering breadboard implementation for the CDRL no. D001 modular digital computer system developed during design of the logic system was documented. This effort followed the architecture study completed and documented previously, and was intended to verify the concepts of a fault tolerant, automatically reconfigurable, modular version of the computer system conceived during the architecture study. The system has a microprogrammed 32 bit word length, general register architecture and an instruction set consisting of a subset of the IBM System 360 instruction set plus additional fault tolerance firmware. The following areas were covered: breadboard packaging, central control element, central processing element, memory, input/output processor, and maintenance/status panel and electronics.

Consumers' Kansei Needs Clustering Method for Product Emotional Design Based on Numerical Design Structure Matrix and Genetic Algorithms.

PubMed

Yang, Yan-Pu; Chen, Deng-Kai; Gu, Rong; Gu, Yu-Feng; Yu, Sui-Huai

2016-01-01

Consumers' Kansei needs reflect their perception about a product and always consist of a large number of adjectives. Reducing the dimension complexity of these needs to extract primary words not only enables the target product to be explicitly positioned, but also provides a convenient design basis for designers engaging in design work. Accordingly, this study employs a numerical design structure matrix (NDSM) by parameterizing a conventional DSM and integrating genetic algorithms to find optimum Kansei clusters. A four-point scale method is applied to assign link weights of every two Kansei adjectives as values of cells when constructing an NDSM. Genetic algorithms are used to cluster the Kansei NDSM and find optimum clusters. Furthermore, the process of the proposed method is presented. The details of the proposed approach are illustrated using an example of electronic scooter for Kansei needs clustering. The case study reveals that the proposed method is promising for clustering Kansei needs adjectives in product emotional design.

Consumers' Kansei Needs Clustering Method for Product Emotional Design Based on Numerical Design Structure Matrix and Genetic Algorithms

PubMed Central

Chen, Deng-kai; Gu, Rong; Gu, Yu-feng; Yu, Sui-huai

2016-01-01

Consumers' Kansei needs reflect their perception about a product and always consist of a large number of adjectives. Reducing the dimension complexity of these needs to extract primary words not only enables the target product to be explicitly positioned, but also provides a convenient design basis for designers engaging in design work. Accordingly, this study employs a numerical design structure matrix (NDSM) by parameterizing a conventional DSM and integrating genetic algorithms to find optimum Kansei clusters. A four-point scale method is applied to assign link weights of every two Kansei adjectives as values of cells when constructing an NDSM. Genetic algorithms are used to cluster the Kansei NDSM and find optimum clusters. Furthermore, the process of the proposed method is presented. The details of the proposed approach are illustrated using an example of electronic scooter for Kansei needs clustering. The case study reveals that the proposed method is promising for clustering Kansei needs adjectives in product emotional design. PMID:27630709

Does design matter? Systematic evaluation of the impact of analytical choices on effect estimates in observational studies

PubMed Central

Ryan, Patrick B.; Schuemie, Martijn

2013-01-01

Background: Clinical studies that use observational databases, such as administrative claims and electronic health records, to evaluate the effects of medical products have become commonplace. These studies begin by selecting a particular study design, such as a case control, cohort, or self-controlled design, and different authors can and do choose different designs for the same clinical question. Furthermore, published papers invariably report the study design but do not discuss the rationale for the specific choice. Studies of the same clinical question with different designs, however, can generate different results, sometimes with strikingly different implications. Even within a specific study design, authors make many different analytic choices and these too can profoundly impact results. In this paper, we systematically study heterogeneity due to the type of study design and due to analytic choices within study design. Methods and findings: We conducted our analysis in 10 observational healthcare databases but mostly present our results in the context of the GE Centricity EMR database, an electronic health record database containing data for 11.2 million lives. We considered the impact of three different study design choices on estimates of associations between bisphosphonates and four particular health outcomes for which there is no evidence of an association. We show that applying alternative study designs can yield discrepant results, in terms of direction and significance of association. We also highlight that while traditional univariate sensitivity analysis may not show substantial variation, systematic assessment of all analytical choices within a study design can yield inconsistent results ranging from statistically significant decreased risk to statistically significant increased risk. Our findings show that clinical studies using observational databases can be sensitive both to study design choices and to specific analytic choices within study design. Conclusion: More attention is needed to consider how design choices may be impacting results and, when possible, investigators should examine a wide array of possible choices to confirm that significant findings are consistently identified. PMID:25083251

System noise analysis of the dumbbell tethered satellite for gravity-gradient measurements

NASA Technical Reports Server (NTRS)

Colombo, G.

1979-01-01

An analysis of the dumbbell gravity gradiometer concept for measuring short wavelength variations in the earth's gravity gradient is presented. Variations in the gradient are recorded by measuring tension variations in a vertically stabilized satellite consisting of heavy masses connected by a long wire or rod. Tension noise arises from the excitation of various mechanical oscillations of the system. The principal noise sources that were identified are fluctuations in atmospheric drag heating and drag force resulting from density variations and winds. Approximate analytical expressions are presented for the tension noise as a function of the system design parameters for various possible configurations. Computer simulations using numerical integration were performed to study the tension noise for several sample cases. Three designs consistent with Shuttle launch capabilities are discussed.

Multimedia Information eXchange for I-NET, Inc. at the Kennedy Space Center: A continuing study of the application of worldwideweb technology

NASA Technical Reports Server (NTRS)

Metcalf, David

1995-01-01

Multimedia Information eXchange (MIX) is a multimedia information system that accommodates multiple data types and provides consistency across platforms. Information from all over the world can be accessed quickly and efficiently with the Internet-based system. I-NET's MIX uses the World Wide Web and Mosaic graphical user interface. Mosaic is available on all platforms used at I-NET's Kennedy Space Center (KSC) facilities. Key information system design concepts and benefits are reviewed. The MIX system also defines specific configuration and helper application parameters to ensure consistent operations across the entire organization. Guidelines and procedures for other areas of importance in information systems design are also addressed. Areas include: code of ethics, content, copyright, security, system administration, and support.

Real-Time Parallel Software Design Case Study: Implementation of the RASSP SAR Benchmark on the Intel Paragon.

DTIC Science & Technology

1996-01-01

Real-Time 19 5 Conclusion 23 List of References 25 ii LIST OF FIGURES FIGURE PAGE 3-1 Test Bench Pseudo Code 7 3-2 Fast Convolution...3-1 shows pseudo - code for a test bench with two application nodes. The outer test bench wrapper consists of three functions: pipeline_init, pipeline...exit_func); Figure 3-1. Test Bench Pseudo Code The application wrapper is contained in the pipeline routine and similarly consists of an

Comparing two methods of education (virtual versus traditional) on learning of Iranian dental students: a post-test only design study.

PubMed

Moazami, Fariborz; Bahrampour, Ehsan; Azar, Mohammad Reza; Jahedi, Farzad; Moattari, Marzieh

2014-03-05

The importance of using technologies such as e-learning in different disciplines is discussed in the literature. Researchers have measured the effectiveness of e-learning in a number of fields.Considering the lack of research on the effectiveness of online learning in dental education particularly in Iran, the advantages of these learning methods and the positive university atmosphere regarding the use of online learning. This study, therefore, aims to compare the effects of two methods of teaching (virtual versus traditional) on student learning. This post-test only design study approached 40, fifth year dental students of Shiraz University of Medical Sciences. From this group, 35 students agreed to participate. These students were randomly allocated into two groups, experimental (virtual learning) and comparison (traditional learning). To ensure similarity between groups, we compared GPAs of all participants by the Mann-Whitney U test (P > 0.05). The experimental group received a virtual learning environment courseware package specifically designed for this study, whereas the control group received the same module structured in a traditional lecture form. The virtual learning environment consisted of online and offline materials. Two identical valid, reliable post-tests that consisted of 40 multiple choice questions (MCQs) and 4 essay questions were administered immediately (15 min) after the last session and two months later to assess for knowledge retention. Data were analyzed by SPSS version 20. A comparison of the mean knowledge score of both groups showed that virtual learning was more effective than traditional learning (effect size = 0.69). The newly designed virtual learning package is feasible and will result in more effective learning in comparison with lecture-based training. However further studies are needed to generalize the findings of this study.

Case study: Lockheed-Georgia Company integrated design process

NASA Technical Reports Server (NTRS)

Waldrop, C. T.

1980-01-01

A case study of the development of an Integrated Design Process is presented. The approach taken in preparing for the development of an integrated design process includes some of the IPAD approaches such as developing a Design Process Model, cataloging Technical Program Elements (TPE's), and examining data characteristics and interfaces between contiguous TPE's. The implementation plan is based on an incremental development of capabilities over a period of time with each step directed toward, and consistent with, the final architecture of a total integrated system. Because of time schedules and different computer hardware, this system will not be the same as the final IPAD release; however, many IPAD concepts will no doubt prove applicable as the best approach. Full advantage will be taken of the IPAD development experience. A scenario that could be typical for many companies, even outside the aerospace industry, in developing an integrated design process for an IPAD-type environment is represented.

Comparing Freshman and doctoral engineering students in design: mapping with a descriptive framework

NASA Astrophysics Data System (ADS)

Carmona Marques, P.

2017-11-01

This paper reports the results of a study of engineering students' approaches to an open-ended design problem. To carry out this, sketches and interviews were collected from 9 freshmen (first year) and 10 doctoral engineering students, when they designed solutions for orange squeezers. Sketches and interviews were analysed and mapped with a descriptive 'ideation framework' (IF) of the design process, to document and compare their design creativity (Carmona Marques, P., A. Silva, E. Henriques, and C. Magee. 2014. "A Descriptive Framework of the Design Process from a Dual Cognitive Engineering Perspective." International Journal of Design Creativity and Innovation 2 (3): 142-164). The results show that the designers worked in a manner largely consistent with the IF for generalisation and specialisation loops. Also, doctoral students produced more alternative solutions during the ideation process. In addition, compared to freshman, doctoral used the generalisation loop of the IF, working at higher levels of abstraction. The iterative nature of design is highlighted during this study - a potential contribution to decrease the gap between both groups in engineering education.

Effect of Environmental Education Based on Transformational Learning Theory on Perceptions towards Environmental Problems and Permanency of Learning

ERIC Educational Resources Information Center

Uyanik, Gökhan

2016-01-01

The aim of the study is to determine effect of environmental education based on transformational learning theory on primary school teacher candidates' perceptions towards environmental problems and permanency of learning. Pretest-posttest quasi-experimental design have been used in this study. The study group consists of 66 teacher candidates who…

The Relationship between Teachers' Leadership Behaviours and Emotional Labour=Ögretmenlerin Liderlik Davranislari Ile Duygusal Emekleri Arasindaki Iliski

ERIC Educational Resources Information Center

Hosgörür, Tugba; Yorulmaz, Yilmaz Ilker

2015-01-01

In this study, it was aimed to determine the relationship between teachers' leadership and emotional labour behaviours. The study was designed using correlational survey model. The sample of the study consists of 340 teachers working in primary, secondary, high and vocational high schools within the provincial capital of Mugla, Turkey, during the…

The Effect of Classroom Performance Assessment on EFL Students' Basic and Inferential Reading Skills

ERIC Educational Resources Information Center

El-Koumy, Abdel Salam Abdel Khalek

2009-01-01

The purpose of this study was to investigate the effect of classroom performance assessment on the EFL students' basic and inferential reading skills. A pretest-posttest quasi-experimental design was employed in the study. The subjects of the study consisted of 64 first-year secondary school students in Menouf Secondary School for Boys at Menoufya…

The Effect of Curriculum-Generated Play Instruction on the Mathematics Teaching Efficacies of Early Childhood Education Pre-Service Teachers

ERIC Educational Resources Information Center

Sancar-Tokmak, Hatice

2015-01-01

This study aimed to investigate the effect of curriculum-generated play instruction on the mathematics teaching efficacy of early childhood education pre-service teachers. The study used a one group pre-test/post-test experimental research design, supported by a qualitative approach. The participants of the study consisted of 35 pre-service…

A Comparative Study of the Perceptions of Accounting Educators and Accountants on Skills Required of Accounting Education Graduates in Automated Offices

ERIC Educational Resources Information Center

Nwokike, Felicia Ogonnia; Eya, Gloria Mgboyibo

2015-01-01

The study dealt with perception of accounting educators and senior accountants on skills required of accounting education graduates for effective job performance in automated offices. The study adopted a descriptive research design.The population consisted of 149 respondents, made up of 80 accounting educators in public tertiary institutions and…

Middle-Level Secondary School Leaders: Potential, Constraints and Implications for Leadership Preparation and Development

ERIC Educational Resources Information Center

Gurr, David; Drysdale, Lawrie

2013-01-01

Purpose: The aim of this paper is to bring together for the first time three studies of middle-level leaders in secondary schools in Victoria, Australia. The studies span more than a decade and allow consideration of the progress in developing middle-level leadership roles. Design/methodology/approach: All studies followed a consistent approach…

Evaluation of Some Approved Basic Science and Technology Textbooks in Use in Junior Secondary Schools in Nigeria

ERIC Educational Resources Information Center

Nwafor, C. E.; Umoke, C. C.

2016-01-01

This study was designed to evaluate the content adequacy and readability of approved basic science and technology textbooks in use in junior secondary schools in Nigeria. Eight research questions guided the study. The sample of the study consisted of six (6) approved basic science and technology textbooks, 30 Junior Secondary Schools randomly…

An Analysis of Teacher Candidates' Usage Level of Metacognitive Learning Strategies: Sample of a University in Turkey

ERIC Educational Resources Information Center

Yesilyurt, Etem

2013-01-01

The purpose of this research is to evaluate the level metacognitive learning strategies are used by teacher candidates. The study was designed as a descriptive research. Study group of present research consists of 291 teacher candidates studying in the Faculty of Education within the body of a Western Anatolian university in Turkey. Research…

The Predictive Power of Undergraduates' Personality Traits and Self-Esteem Regarding Their Forgiveness

ERIC Educational Resources Information Center

Yalcin, S. Barbaros; Kavakli, Mehmet; Kesici, Sahin

2017-01-01

Purpose: The purpose of this study is to determine whether or not the undergraduates' personality traits and self-esteem predict their forgiveness. Methods: The study was conducted using a descriptive research designed as a relational survey method. The study group consists of 323 undergraduates, of whom 250 (77.2 %) are female and 73 (22.5%) are…

Nature of Science Instruction to Turkish Prospective Chemistry Teachers: The Effect of Explicit-Reflective Approach

ERIC Educational Resources Information Center

Aglarci, Oya; Sariçayir, Hakan; Sahin, Musa

2016-01-01

The purpose of this study is to investigate the effect of explicit-reflective nature of science (NOS) instruction on Turkish prospective chemistry teachers' (PCTs) views of NOS. In the research, case study as a qualitative design was used and PCTs' views were examined thoroughly. The participants of the study consisted of 22 senior PCTs. Data…

The Effectiveness of Conceptual Change Texts in Remediating High School Students' Alternative Conceptions Concerning Chemical Equilibrium

ERIC Educational Resources Information Center

Ozmen, Haluk

2007-01-01

This study investigated the effectiveness of conceptual change texts in remediating high school students' alternative conceptions concerning chemical equilibrium. A quasi-experimental design was used in this study. The subjects for this study consisted of a total 78 tenth-grade students, 38 of them in the experimental group and 40 of them in the…

The Effects of Teaching Informative Text through Processual Model on Reading Comprehension Skills

ERIC Educational Resources Information Center

Sulak, Süleyman Erkam; Günes, Firdevs

2017-01-01

This study was carried out in order to search the effects of teaching informative text structures through processual model on the reading comprehension skills of 4th grade students. The research was designed in accordance with experimental model with pre-test-post-test control groups. The study group of the study consisted of 62 fourth grade…

A Comparison of Rubrics and Graded Category Rating Scales with Various Methods Regarding Raters' Reliability

ERIC Educational Resources Information Center

Dogan, C. Deha; Uluman, Müge

2017-01-01

The aim of this study was to determine the extent at which graded-category rating scales and rubrics contribute to inter-rater reliability. The research was designed as a correlational study. Study group consisted of 82 students attending sixth grade and three writing course teachers in a private elementary school. A performance task was…

A Survey of Students' Experiences on Collaborative Virtual Learning Activities Based on Five-Stage Model

ERIC Educational Resources Information Center

Karaman, M. Kemal; Özen, Sevil Orhan

2016-01-01

In this study, we aimed to design collaborative virtual learning (CVL) activities by using a five-stage model (FSM) and survey of students' experiences. The study group consisted of 14 voluntary students in the Turkish Teaching Department. In this case study, data were collected through observations, recordings in Second Life (SL) and interviews.…

Near East and North Africa: A Question Syllabus. Center for Area and Country Studies.

ERIC Educational Resources Information Center

Howard, Harry N.

This study syllabus on the Near East and North Africa is divided into twelve units. Designed to familiarize government personnel assigned to the area with the region and people, each unit consists of a statement of the main objectives to be studied, questions for consideration, and a list of suggested readings from books and periodicals. Units…

Right-Handed Helical Foldamers Consisting of De Novo d -AApeptides

DOE Office of Scientific and Technical Information (OSTI.GOV)

Teng, Peng; Ma, Ning; Cerrato, Darrell Cole

New types of foldamer scaffolds are formidably challenging to design and synthesize, yet highly desirable as structural mimics of peptides/proteins with a wide repertoire of functions. In particular, the development of peptidomimetic helical foldamers holds promise for new biomaterials, catalysts, and drug molecules. Unnatural l-sulfono-γ-AApeptides were recently developed and shown to have potential applications in both biomedical and material sciences. However, d-sulfono-γ-AApeptides, the enantiomers of l-sulfono-γ-AApeptides, have never been studied due to the lack of high-resolution three-dimensional structures to guide structure-based design. Herein, we report the first synthesis and X-ray crystal structures of a series of 2:1 l-amino acid/d-sulfono-γ-AApeptide hybridmore » foldamers, and elucidate their folded conformation at the atomic level. Single-crystal X-ray crystallography indicates that this class of oligomers folds into well-defined right-handed helices with unique helical parameters. The helical structures were consistent with data obtained from solution 2D NMR, CD studies, and molecular dynamics simulations. Our findings are expected to inspire the structure-based design of this type of unique folding biopolymers for biomaterials and biomedical applications.« less

Microstructural analysis of hot press formed 22MnB5 steel

NASA Astrophysics Data System (ADS)

Aziz, Nuraini; Aqida, Syarifah Nur; Ismail, Izwan

2017-10-01

This paper presents a microstructural study on hot press formed 22MnB5 steel for enhanced mechanical properties. Hot press forming process consists of simultaneous forming and quenching of heated blank. The 22MnB5 steel was processed at three different parameter settings: quenching time, water temperature and water flow rate. 22MnB5 was processed using 33 full factorial design of experiment (DOE). The full factorial DOE was designed using three factors of quenching time, water temperature and water flow rate at three levels. The factors level were quenching time range of 5 - 11 s, water temperature; 5 - 27°C and water flow rate; 20 - 40 L/min. The as-received and hot press forming processed steel was characterised for metallographic study and martensitic structure area percentage using JEOL Field Emission Scanning Electron Microscopic (FESEM). From the experimental finding, the hot press formed 22MnB5 steel consisted of 50 to 84% martensitic structure area. The minimum quenching time of 8 seconds was required to obtain formed sample with high percentage of martensite. These findings contribute to initial design of processing parameters in hot press forming of 22MnB5 steel blanks for automotive component.

The Effect of Psychoeducational Group Training Depending on Self Regulation on Students' Motivational Strategies and Academic Achievement

ERIC Educational Resources Information Center

Onemli, Mehmet; Yondem, Zeynep Deniz

2012-01-01

The aim of this study was to determine the effect of psychoeducational group study regarding self regulation in learning on motivational beliefs and academic success of students. Pre and post tests with control group design were used in this study. Participants of the study consisted of 10th grade students at Anatolian High School.…

Prospective Teachers' Representations for Teaching Note Values: An Analysis in the Context of Mathematics and Music

ERIC Educational Resources Information Center

Özgül, Ilhan; Incikabi, Lütfi

2017-01-01

In this study, the representations preferred by prospective teachers in the teaching of note values were determined and the accuracy of these representations was analyzed in the context of mathematics and music. The case study, one of the qualitative research designs, was used in the study. Study group of the research consisted of 113 pre-school…

8th Grade Student's Skill of Connecting Mathematics to Real Life

ERIC Educational Resources Information Center

Altay, Mesture Kayhan; Yalvaç, Betül; Yeltekin, Emel

2017-01-01

The purpose of this study is to examine 8th grade students' skills of connecting mathematics to real life. This study uses survey design since it aims to determine existing situations regarding to students' skills of connecting mathematics to real life. The study sample consists of 176 students in total, who are studying at a state school in the…

A systems-approach to the design of the Eos data and information system

NASA Technical Reports Server (NTRS)

Chase, Robert R. P.

1987-01-01

The task of designing a data and information system responsive to the needs of Eos users is stratified by level and approached with contemporary systems design practices. Appropriate systems design principles are applied at the conceptual design level in this paper. A functional, architectural design is described in terms of elemental composition, top-level functions, and external and internal interfaces. The functional validity of this design has been tested and verified through the use of realistic user scenarios consistent with existing plans for the 1990s, the Space Station era. Technologic and management impediments to the development of the requisite data and information system for Eos are examined and a consistent methodology for developing this system is discussed.

Design study of a radio-frequency quadrupole for high-intensity beams

NASA Astrophysics Data System (ADS)

Bahng, Jungbae; Kim, Eun-San; Choi, Bong-Hyuk

2017-07-01

The Rare isotope Accelerator Of Newness (RAON) heavy-ion accelerator has been designed for the Rare Isotope Science Project (RISP) in Korea. The RAON will produce heavy-ion beams from 660-MeV-proton to 200-MeV/u-uranium with continuous wave (CW) power of 400 kW to support research in various scientific fields. Its system consists of an ECR ion source, LEBTs with 10 keV/u, CW RFQ accelerator with 81.25 MHz and 500 keV/u, a MEBT system, and a SC linac. In detail, the driver linac system consists of a Quarter Wave Resonator (QWR) section with 81.25 MHz and a Half Wave Resonator (HWR) section with 162.5 MHz, Linac-1, and a Spoke Cavity section with 325 MHz, Linac-2. These linacs have been designed to optimize the beam parameters to meet the required design goals. At the same time, a light-heavy ion accelerator with high-intensity beam, such as proton, deuteron, and helium beams, is required for experiments. In this paper, we present the design study of the high intensity RFQ for a deuteron beam with energies from 30 keV/u to 1.5 MeV/u and currents in the mA range. This system is composed of an Penning Ionization Gauge ion source, short LEBT with a RF deflector, and shared SC Linac. In order to increase acceleration efficiency in a short length with low cost, the 2nd harmonic of 162.5 MHz is applied as the operation frequency in the D+ RFQ design. The D+ RFQ is designed with 4.97 m, 1.52 bravery factor. Since it operates with 2nd harmonic frequency, the beam should be 50% of the duty factor while the cavity should be operated in CW mode, to protect the downstream linac system. We focus on avoiding emittance growth by the space-charge effect and optimizing the RFQ to achieve a high transmission and low emittance growth. Both the RFQ beam dynamics study and RFQ cavity design study for two and three dimensions will be discussed. Supported by Korea University Future Research Grant

M-Learning and Technological Literacy: Analyzing Benefits for Apprenticeship

ERIC Educational Resources Information Center

Cortés, Carlos Manuel Pacheco; Cortés, Adriana Margarita Pacheco

2014-01-01

The following study consists on comparative literature review conducted by several researchers and instructional designers; for a wide comprehension of Mobile-Learning (abbreviated "M-Learning") as an educational platform to provide "anytime-anywhere" access to interactions and resources on-line, and "Technological…

A Model-Driven Visualization Tool for Use with Model-Based Systems Engineering Projects

NASA Technical Reports Server (NTRS)

Trase, Kathryn; Fink, Eric

2014-01-01

Model-Based Systems Engineering (MBSE) promotes increased consistency between a system's design and its design documentation through the use of an object-oriented system model. The creation of this system model facilitates data presentation by providing a mechanism from which information can be extracted by automated manipulation of model content. Existing MBSE tools enable model creation, but are often too complex for the unfamiliar model viewer to easily use. These tools do not yet provide many opportunities for easing into the development and use of a system model when system design documentation already exists. This study creates a Systems Modeling Language (SysML) Document Traceability Framework (SDTF) for integrating design documentation with a system model, and develops an Interactive Visualization Engine for SysML Tools (InVEST), that exports consistent, clear, and concise views of SysML model data. These exported views are each meaningful to a variety of project stakeholders with differing subjects of concern and depth of technical involvement. InVEST allows a model user to generate multiple views and reports from a MBSE model, including wiki pages and interactive visualizations of data. System data can also be filtered to present only the information relevant to the particular stakeholder, resulting in a view that is both consistent with the larger system model and other model views. Viewing the relationships between system artifacts and documentation, and filtering through data to see specialized views improves the value of the system as a whole, as data becomes information

Correlation between safety assessments in the driver-car interaction design process.

PubMed

Broström, Robert; Bengtsson, Peter; Axelsson, Jakob

2011-05-01

With the functional revolution in modern cars, evaluation methods to be used in all phases of driver-car interaction design have gained importance. It is crucial for car manufacturers to discover and solve safety issues early in the interaction design process. A current problem is thus to find a correlation between the formative methods that are used during development and the summative methods that are used when the product has reached the customer. This paper investigates the correlation between efficiency metrics from summative and formative evaluations, where the results of two studies on sound and navigation system tasks are compared. The first, an analysis of the J.D. Power and Associates APEAL survey, consists of answers given by about two thousand customers. The second, an expert evaluation study, was done by six evaluators who assessed the layouts by task completion time, TLX and Nielsen heuristics. The results show a high degree of correlation between the studies in terms of task efficiency, i.e. between customer ratings and task completion time, and customer ratings and TLX. However, no correlation was observed between Nielsen heuristics and customer ratings, task completion time or TLX. The results of the studies introduce a possibility to develop a usability evaluation framework that includes both formative and summative approaches, as the results show a high degree of consistency between the different methodologies. Hence, combining a quantitative approach with the expert evaluation method, such as task completion time, should be more useful for driver-car interaction design. Copyright © 2010 Elsevier Ltd and The Ergonomics Society. All rights reserved.

Sexual behavioral abstine HIV/AIDS questionnaire: Validation study of an Iranian questionnaire.

PubMed

Najarkolaei, Fatemeh Rahmati; Niknami, Shamsaddin; Shokravi, Farkhondeh Amin; Tavafian, Sedigheh Sadat; Fesharaki, Mohammad Gholami; Jafari, Mohammad Reza

2014-01-01

This study was designed to assess the validity and reliability of the designed sexual, behavioral abstinence, and avoidance of high-risk situation questionnaire (SBAHAQ), with an aim to construct an appropriate development tool in the Iranian population. A descriptive-analytic study was conducted among female undergraduate students of Tehran University, who were selected through cluster random sampling. After reviewing the questionnaires and investigating face and content validity, internal consistency of the questionnaire was assessed by Cronbach's alpha. Explanatory and confirmatory factor analysis was conducted using SPSS and AMOS 16 Software, respectively. The sample consisted of 348 female university students with a mean age of 20.69 ± 1.63 years. The content validity ratio (CVR) coefficient was 0.85 and the reliability of each section of the questionnaire was as follows: Perceived benefit (PB; 0.87), behavioral intention (BI; 0.77), and self-efficacy (SE; 0.85) (Cronbach's alpha totally was 0.83). Explanatory factor analysis showed three factors, including SE, PB, and BI, with the total variance of 61% and Kaiser-Meyer-Olkin (KMO) index of 88%. These factors were also confirmed by confirmatory factor analysis [adjusted goodness of fitness index (AGFI) = 0.939, root mean square error of approximation (RMSEA) = 0.039]. This study showed the designed questionnaire provided adequate construct validity and reliability, and could be adequately used to measure sexual abstinence and avoidance of high-risk situations among female students.

STEM integration in middle school career and technical education programs: A Delphi design study

NASA Astrophysics Data System (ADS)

Wu-Rorrer, Billy Ray

The purpose of this qualitative method study with a Delphi research design sought to determine how STEM programs can be effectively integrated into middle school career and technical education programs by local, state, and national educators, administrators, directors, specialists, and curriculum writers. The significance of the study is to provide leaders in CTE with a greater awareness, insight, and strategies about how CTE programs can more effectively integrate academics into career and technical education programs through STEM-related programming. The findings will increase the limited amount of available literature providing best practice strategies for the integration of STEM curriculum into middle school CTE programs. One basic question has guided this research: How can STEM programs be effectively integrated into middle school career and technical education programs? A total of twelve strategies were identified. The strategies of real-world applications and administrative buy-in were the two predominant strategies consistently addressed throughout the review of literature and all three sub-questions in the research study. The Delphi design study consisted of pilot round and three rounds of data collection on barriers, strategies, and professional development for STEM integration in middle school career and technical education programs. Four panelists participated in the pilot round, and 16 panel members not involved in the pilot round participated in the three rounds of questioning and consensus building. In the future, more comprehensive studies can build upon this foundational investigation of middle school CTE programs.

Comparative analysis of the conceptual design studies of potential early commercial MHD power plants (CSPEC)

NASA Technical Reports Server (NTRS)

Sovie, R. J.; Winter, J. M.; Juhasz, A. J.; Berg, R. D.

1982-01-01

A conceptual design study of the MHD/steam plant that incorporates the use of oxygen enriched air preheated in a metallic heat exchanger as the combustor oxidant showed that this plant is the most attractive for early commercial applications. The variation of performance and cost was investigated as a function of plant size. The contractors' results for the overall efficiencies are in reasonable agreement considering the slight differences in their plant designs. NASA LeRC is reviewing cost and performance results for consistency with those of previous studies, including studies of conventional steam plants. LeRC in house efforts show that there are still many tradeoffs to be considered for these oxygen enriched plants and considerable variations can be made in channel length and level of oxygen enrichment with little change in overall plant efficiency.

REPDOSE: A database on repeated dose toxicity studies of commercial chemicals--A multifunctional tool.

PubMed

Bitsch, A; Jacobi, S; Melber, C; Wahnschaffe, U; Simetska, N; Mangelsdorf, I

2006-12-01

A database for repeated dose toxicity data has been developed. Studies were selected by data quality. Review documents or risk assessments were used to get a pre-screened selection of available valid data. The structure of the chemicals should be rather simple for well defined chemical categories. The database consists of three core data sets for each chemical: (1) structural features and physico-chemical data, (2) data on study design, (3) study results. To allow consistent queries, a high degree of standardization categories and glossaries were developed for relevant parameters. At present, the database consists of 364 chemicals investigated in 1018 studies which resulted in a total of 6002 specific effects. Standard queries have been developed, which allow analyzing the influence of structural features or PC data on LOELs, target organs and effects. Furthermore, it can be used as an expert system. First queries have shown that the database is a very valuable tool.

Real-time monitoring of beta-d-glucuronidase activity in sediment laden streams: A comparison of prototypes.

PubMed

Stadler, Philipp; Blöschl, Günter; Vogl, Wolfgang; Koschelnik, Juri; Epp, Markus; Lackner, Maximilian; Oismüller, Markus; Kumpan, Monika; Nemeth, Lukas; Strauss, Peter; Sommer, Regina; Ryzinska-Paier, Gabriela; Farnleitner, Andreas H; Zessner, Matthias

2016-09-15

Detection of enzymatic activities has been proposed as a rapid surrogate for the culture-based microbiological pollution monitoring of water resources. This paper presents the results of tests on four fully automated prototype instruments for the on-site monitoring of beta-d-glucuronidase (GLUC) activity. The tests were performed on sediment-laden stream water in the Hydrological Open Air Laboratory (HOAL) during the period of March 2014 to March 2015. The dominant source of faecal pollution in the stream was swine manure applied to the fields within the catchment. The experiments indicated that instrument pairs with the same construction design yielded highly consistent results (R(2) = 0.96 and R(2) = 0.94), whereas the results between different designs were less consistent (R(2) = 0.71). Correlations between the GLUC activity measured on-site and culture-based Escherichia coli analyses over the entire study period yielded R(2) = 0.52 and R(2) = 0.47 for the two designs, respectively. The correlations tended to be higher at the event scale. The GLUC activity was less correlated with suspended sediment concentrations than with E. coli, which is interpreted in terms of indicator applicability and the time since manure application. The study shows that this rapid assay can yield consistent results over a long period of on-site operation in technically challenging habitats. Although the use of GLUC activity as a proxy for culture-based assays could not be proven for the observed habitat, the study results suggest that this biochemical indicator has high potential for implementation in early warning systems. Copyright © 2016 The Authors. Published by Elsevier Ltd.. All rights reserved.

A Study on the Barriers to Participation of Females in Science, Mathematics and Technology Education in Imo State the Way Forward

ERIC Educational Resources Information Center

Iwu, R. U.; Azoro, A. V.

2017-01-01

A study was carried out to ascertain the barriers to effective participation of females in surface-mount technology (SMT) in Imo State. Four purposes and four research questions guided the study. The study adopted the survey research design. The population of the study consists of all the female science students and lecturers in six tertiary…

Regulatory Forum opinion piece: New testing paradigms for reproductive and developmental toxicity--the NTP modified one generation study and OECD 443.

PubMed

Foster, Paul M D

2014-12-01

The National Toxicology Program (NTP) has developed a new flexible study design, termed the modified one generation (MOG) reproduction study. The MOG study will encompass measurements of developmental and reproductive toxicity parameters as well as enable the setting of appropriate dose levels for a cancer bioassay through evaluation of target organ toxicity that is based on test article exposure that starts during gestation. This study design is compared and contrasted with the new Organization for Economic Co-operation and Development (OECD) 443 test guideline, the extended one generation reproduction study. The MOG study has a number of advantages, with a focus on F 1 animals, the generation of adequately powered, robust data sets that include both pre and postnatal developmental toxicity information, and the measurement of effects on reproductive structure and function in the same animals. This new study design does not employ the use of internal triggers in the design structure for the use of animals already on test and is also consistent with the principles of the 3R's. © 2014 by The Author(s).

Designing simulator-based training: an approach integrating cognitive task analysis and four-component instructional design.

PubMed

Tjiam, Irene M; Schout, Barbara M A; Hendrikx, Ad J M; Scherpbier, Albert J J M; Witjes, J Alfred; van Merriënboer, Jeroen J G

2012-01-01

Most studies of simulator-based surgical skills training have focused on the acquisition of psychomotor skills, but surgical procedures are complex tasks requiring both psychomotor and cognitive skills. As skills training is modelled on expert performance consisting partly of unconscious automatic processes that experts are not always able to explicate, simulator developers should collaborate with educational experts and physicians in developing efficient and effective training programmes. This article presents an approach to designing simulator-based skill training comprising cognitive task analysis integrated with instructional design according to the four-component/instructional design model. This theory-driven approach is illustrated by a description of how it was used in the development of simulator-based training for the nephrostomy procedure.

Study of space shuttle orbiter system management computer function. Volume 1: Analysis, baseline design

NASA Technical Reports Server (NTRS)

1975-01-01

A system analysis of the shuttle orbiter baseline system management (SM) computer function is performed. This analysis results in an alternative SM design which is also described. The alternative design exhibits several improvements over the baseline, some of which are increased crew usability, improved flexibility, and improved growth potential. The analysis consists of two parts: an application assessment and an implementation assessment. The former is concerned with the SM user needs and design functional aspects. The latter is concerned with design flexibility, reliability, growth potential, and technical risk. The system analysis is supported by several topical investigations. These include: treatment of false alarms, treatment of off-line items, significant interface parameters, and a design evaluation checklist. An in-depth formulation of techniques, concepts, and guidelines for design of automated performance verification is discussed.

Control group design: enhancing rigor in research of mind-body therapies for depression.

PubMed

Kinser, Patricia Anne; Robins, Jo Lynne

2013-01-01

Although a growing body of research suggests that mind-body therapies may be appropriate to integrate into the treatment of depression, studies consistently lack methodological sophistication particularly in the area of control groups. In order to better understand the relationship between control group selection and methodological rigor, we provide a brief review of the literature on control group design in yoga and tai chi studies for depression, and we discuss challenges we have faced in the design of control groups for our recent clinical trials of these mind-body complementary therapies for women with depression. To address the multiple challenges of research about mind-body therapies, we suggest that researchers should consider 4 key questions: whether the study design matches the research question; whether the control group addresses performance, expectation, and detection bias; whether the control group is ethical, feasible, and attractive; and whether the control group is designed to adequately control for nonspecific intervention effects. Based on these questions, we provide specific recommendations about control group design with the goal of minimizing bias and maximizing validity in future research.

Control Group Design: Enhancing Rigor in Research of Mind-Body Therapies for Depression

PubMed Central

Kinser, Patricia Anne; Robins, Jo Lynne

2013-01-01

Although a growing body of research suggests that mind-body therapies may be appropriate to integrate into the treatment of depression, studies consistently lack methodological sophistication particularly in the area of control groups. In order to better understand the relationship between control group selection and methodological rigor, we provide a brief review of the literature on control group design in yoga and tai chi studies for depression, and we discuss challenges we have faced in the design of control groups for our recent clinical trials of these mind-body complementary therapies for women with depression. To address the multiple challenges of research about mind-body therapies, we suggest that researchers should consider 4 key questions: whether the study design matches the research question; whether the control group addresses performance, expectation, and detection bias; whether the control group is ethical, feasible, and attractive; and whether the control group is designed to adequately control for nonspecific intervention effects. Based on these questions, we provide specific recommendations about control group design with the goal of minimizing bias and maximizing validity in future research. PMID:23662111

Research studies on advanced optical module/head designs for optical devices

NASA Technical Reports Server (NTRS)

Burke, James J.

1991-01-01

A summary is presented of research in optical data storage materials and of research at the center. The first section contains summary reports under the general headings of: (1) Magnetooptic media: modeling, design, fabrication, characterization, and testing; (2) Optical heads: holographic optical elements; and (3) Optical heads: integrated optics. The second section consist of a proposal entitled, Signal Processing Techniques for Optical Data Storage. And section three presents various publications prepared by the center.

Flat conductor cable commercialization project

NASA Technical Reports Server (NTRS)

Hogarth, P.; Wadsworth, E.

1977-01-01

An undercarpet flat conductor cable and a baseboard flat conductor cable system were studied for commercialization. The undercarpet system is designed for use in office and commercial buildings. It employs a flat power cable, protected by a grounded metal shield, that terminates in receptacles mounted on the floor. It is designed to interface with a flat conductor cable telephone system. The baseboard system consists of a flat power cable mounted in a plastic raceway; both the raceway and the receptacles are mounted on the surface of the baseboard. It is designed primarily for use in residential buildings, particularly for renovation and concrete and masonry construction.

Writing Became a Chore Like the Laundry: The Realities of Using Journals To Encourage a Reflective Approach to Practice.

ERIC Educational Resources Information Center

Lewison, Mitzi

This action research study investigated a model of professional development designed to encourage elementary language arts teachers to adopt a more reflective approach to literacy instruction. The model consisted of monthly negotiated-topic study group sessions, theoretically-based reading, and dialogue journal writing. This paper focuses on the…

Communicating Ocean Sciences to Informal Audiences (COSIA): Case Studies

ERIC Educational Resources Information Center

Inverness Research, 2010

2010-01-01

The three case studies presented in this paper are descriptive and evaluative in nature, and are designed to describe, explain, and portray in some detail three examples of COSIA partnerships. These cases are context bound; the place-based aspect of these cases is critical to the phenomenon being explored. Consistent with the goal for employing a…

Informal Learning: Student Achievement and Motivation in Science through Museum-Based Learning

ERIC Educational Resources Information Center

Holmes, Julie A.

2011-01-01

This study examined changes in student motivation and achievement in science during a visit to a university children's science museum. The study was based on the pretest-posttest control comparison group design with four treatment groups: control, exhibit, lesson and exhibit/lesson. The sample consisted of 228 sixth-grade students from a Louisiana…

Microteaching and Pre-Service Teachers' Sense of Self-Efficacy in Teaching

ERIC Educational Resources Information Center

Arsal, Zeki

2014-01-01

This study examined the effect of microteaching on pre-service teachers' sense of self-efficacy in teaching using a pre-test/post-test quasi-experimental design. The sample of the study consisted of 70 pre-service teachers on a special education teacher preparation programme. The pre-service teachers in the experimental group were exposed to…

Web-Browsing Competencies of Pre-Service Adult Facilitators: Implications for Curriculum Transformation and Distance Learning

ERIC Educational Resources Information Center

Theresa, Ofoegbu; Ugwu, Agboeze Matthias; Ihebuzoaju, Anyanwu Joy; Uche, Asogwa

2013-01-01

The study investigated the Web-browsing competencies of pre-service adult facilitators in the southeast geopolitical zone of Nigeria. Survey design was adopted for the study. The population consists of all pre-service adult facilitators in all the federal universities in the southeast geopolitical zone of Nigeria. Accidental sampling technique was…

Avatars with Sex Appeal as Pedagogical Agents: Attractiveness, Trustworthiness, Expertise, and Gender Differences

ERIC Educational Resources Information Center

Wang, Chih-Chien; Yeh, Wei-Jyh

2013-01-01

The study focused on the use of pedagogical agents with sex appeal in a computer-assisted learning environment. The study adopted a 2 (male/female) × 3 (demure/seductive/overtly sexual) experimental design. The primary analysis consisted of 2 parts: (a) comparing the impact of effective learning on students' perceptions of demure, seductive, or…

Conceptual Change Text: A Supplementary Material To Facilitate Conceptual Change in Electrochemical Cell Concepts.

ERIC Educational Resources Information Center

Yuruk, Nejla; Geban, Omer

The main purpose of the study was to investigate the effectiveness of conceptual change text (CCT) oriented instruction over traditionally designed instruction on students' understanding of electrochemical (galvanic and electrolytic) cell concepts. The subjects of the study consisted of 64 students from the two classes of a high school in Turkey.…

The Reading Profile of Turkish Primary School Students

ERIC Educational Resources Information Center

Dag, Nilgün

2017-01-01

This study aims to reveal the reading profile of primary school students. The research design is based on a survey model with the research population being comprised of primary school students in the 2014-2015 academic year in the city center of Nevsehir, Turkey. The sample of the study consists of 120 fourth-grade students. The research data was…

Investigation of the Secondary School Students' Images of Scientists

ERIC Educational Resources Information Center

Akgün, Abuzer

2016-01-01

The overall purpose of this study is to explore secondary school students' images of scientists. In addition to this comprehensive purpose, it is also investigated that if these students' current images of scientists and those in which they see themselves as a scientist in the near future are consistent or not. The study was designed in line with…

Aggressive Behavior between Siblings and the Development of Externalizing Problems: Evidence from a Genetically Sensitive Study

ERIC Educational Resources Information Center

Natsuaki, Misaki N.; Ge, Xiaojia; Reiss, David; Neiderhiser, Jenae M.

2009-01-01

This study investigated the prospective links between sibling aggression and the development of externalizing problems using a multilevel modeling approach with a genetically sensitive design. The sample consisted of 780 adolescents (390 sibling pairs) who participated in 2 waves of the Nonshared Environment in Adolescent Development project.…

Relationship between Leadership Styles of School Principals and Whistleblowing Behaviors of Teachers

ERIC Educational Resources Information Center

Erturk, Abbas; Donmez, Emrah

2016-01-01

This study aims to determine the relationship between leadership styles of school principals and whistle blowing behaviors of teachers. The sample of this study, which is designed in the relational survey model, consists of 393 teachers working in primary, secondary and high schools in the province of Mugla. The data were collected through…

Dropout! An Evaluation of A Pilot Dropout Project.

ERIC Educational Resources Information Center

Dye, Robert P.; And Others

This report evaluated a project designed to identify, locate, and assist high school dropouts in Oahu, Hawaii. The study group consisted of 105 males and 145 females. Former dropouts were used as outreach aides to: (1) contact potential dropouts in the schools, and (2) to assist the student in resolving his difficulty. The study revealed that most…

Sociocultural Influences: Evaluations of Indigenous Children for Special Needs in Rural Central Mexico

ERIC Educational Resources Information Center

Mackenzie, Jacqueline Zaleski

2010-01-01

This study examined indigenous infants, children, and youth in rural central Mexico for developmental delays by using a mixed methods approach. A two-person team consisting of a researcher and a translator completed this study. They conducted observations of 665 minors and interviews with their caregivers. A self-designed rubric was the guide to…

An Exercise on Calibration: DRIFTS Study of Binary Mixtures of Calcite and Dolomite with Partially Overlapping Spectral Features

ERIC Educational Resources Information Center

De Lorenzi Pezzolo, Alessandra

2013-01-01

Unlike most spectroscopic calibrations that are based on the study of well-separated features ascribable to the different components, this laboratory experience is especially designed to exploit spectral features that are nearly overlapping. The investigated system consists of a binary mixture of two commonly occurring minerals, calcite and…

Factors Contributing to Cognitive Absorption and Grounded Learning Effectiveness in a Competitive Business Marketing Simulation

ERIC Educational Resources Information Center

Baker, David Scott; Underwood, James, III; Thakur, Ramendra

2017-01-01

This study aimed to establish a pedagogical positioning of a business marketing simulation as a grounded learning teaching tool and empirically assess the dimensions of cognitive absorption related to grounded learning effectiveness in an iterative business simulation environment. The method/design and sample consisted of a field study survey…

EFL Learning and Identity Development: A Longitudinal Study in 5 Universities in China

ERIC Educational Resources Information Center

Gao, Yihong; Jia, Zengyan; Zhou, Yan

2015-01-01

Combining psychological and social perspectives and using mixed methods, this 4-year longitudinal study examined the EFL learning and self-identity development of about 1,000 students from 5 universities in Beijing, China. The self-designed questionnaire, administered 5 times during the 4 years, consisted of 7 identity categories of identity…

Turkish Foreign Language Learners' Roles and Outputs: Introducing an Innovation and Role-Playing in Second Life

ERIC Educational Resources Information Center

Ozbek, Cigdem; Comoglu, Irem; Baran, Bahar

2017-01-01

This study aims to design of the two activities "introducing an innovation" and "role playing" in Second Life (SL) and to evaluate qualitatively Turkish foreign language learner's roles and outputs before, while, and after the implementation of the activities. The study used community of inquiry model consisting of cognitive…

Problem-Based Instructional Strategy and Numerical Ability as Determinants of Senior Secondary Achievement in Mathematics

ERIC Educational Resources Information Center

Badru, Ademola K.

2016-01-01

The study investigated Problem-based Instructional Strategy and Numerical ability as determinants of Senior Secondary Achievement in Mathematics. This study used 4 x 2 x 2 non-randomised control group Pretest-Posttest Quasi-experimental Factorial design. It consisted of two independent variables (treatment and Numerical ability) and one moderating…

The Influence of Reflection on Employee Psychological Empowerment: Report of an Exploratory Workplace Field Study

ERIC Educational Resources Information Center

Cyboran, Vincent L.

2005-01-01

The study examined the influences of reflection on the self-perception of empowerment in the workplace. The convenience sample consisted of non-management knowledge workers at a software company headquartered in the United States. A pretest, posttest control group design was used. The experimental group kept guided journals of their learning…

Importance and Effectiveness of Student Health Services at a South Texas University

ERIC Educational Resources Information Center

McCaig, Marilyn M.

2013-01-01

The study examined the health needs of students at a south Texas university and documented the utility of the student health center. The descriptive study employed a mixed methods explanatory sequential design (ESD). The non-probability sample consisted of 140 students who utilized the university's health center during the period of March 23-30,…

Analysis of High School German Textbooks through Rasch Measurement Model

ERIC Educational Resources Information Center

Batdi, Veli; Elaldi, Senel

2016-01-01

The purpose of the present study is to analyze German teacher trainers' views on high school German textbooks through the Rasch measurement model. A survey research design was employed and study group consisted of a total of 21 teacher trainers, three from each region and selected randomly from provinces which are located in seven regions and…

Diverse Educational Leadership Training Academy at Northeastern State University-Broken Arrow Campus in Oklahoma: Why Is It Working?

ERIC Educational Resources Information Center

Mahan, Melissa Kaye

2009-01-01

Scope and method of study. This study used a descriptive design in which quantitative subject profile data were expanded upon by qualitative data from focus group interviews. Specifically, institutional data from Northeastern State University and focus group interviews with DELTA graduates were used. The institutional data collected consisted of…

Effect of Instructional Strategy on Critical Thinking and Content Knowledge: Using Problem-Based Learning in the Secondary Classroom

ERIC Educational Resources Information Center

Burris, Scott; Garton, Bryan L.

2007-01-01

The purpose of the study was to determine the effect of problem-based learning (PBL) on critical thinking ability and content knowledge among selected secondary agriculture students in Missouri. The study employed a quasi-experimental, non-equivalent comparison group design. The treatment consisted of two instructional strategies: problem-based…

Taiwanese Families' Perspectives on Learning Disabilities: An Exploratory Study in Three Middle Schools

ERIC Educational Resources Information Center

Chu, Szu-Yin; Lo, Yu-Ling Sabrina

2016-01-01

The purpose of this study was to investigate families' perspectives on learning disabilities (LD) in Taiwan. A researcher-designed survey was sent out to families of children with or without LD from three middle schools. Data from 153 participants were gathered and analysed. The survey consisted of four sections, namely demographic information,…

Patterns of Teacher's Instructional Moves: What Makes Mathematical Instructional Practices Unique?

ERIC Educational Resources Information Center

Pinter, Holly Henderson

2013-01-01

The purpose of this study was to examine patterns in fourth-grade teachers' use of instructional moves in the implementation of standards-based mathematical teaching practices. Using a mixed methods sequential explanatory design, the study consisted of two phases: quantitative selection and qualitative analysis. The first phase of the study…

Thai Undergraduate Chemistry Practical Learning Experiences Using the Jigsaw IV Method

ERIC Educational Resources Information Center

Jansoon, Ninna; Somsook, Ekasith; Coll, Richard K.

2008-01-01

The research reported in this study consisted of an investigation of student learning experiences in Thai chemistry laboratories using the Jigsaw IV method. A hands-on experiment based on the Jigsaw IV method using a real life example based on green tea beverage was designed to improve student affective variables for studying topics related to…

A COMPARISON OF MATHEMATICS PROGRAMS FOR ABLE JUNIOR HIGH SCHOOL STUDENTS, VOLUME 1 - FINAL REPORT.

ERIC Educational Resources Information Center

GOLDBERG, MIRIAM L.; AND OTHERS

THE TALENTED YOUTH PROJECT (TYP) MATHEMATICS STUDY WAS DESIGNED AS A STUDY TO COMPARE THE EFFECTIVENESS OF VARIOUS CURRICULUM PATTERNS AND PRACTICES IN MATHEMATICS EDUCATION CURRENTLY USED WITH ACADEMICALLY TALENTED JUNIOR HIGH SCHOOL STUDENTS. THE SAMPLE CONSISTED OF 51 CLASSES AND 6 MATHEMATICS PROGRAMS. THE LORGE-THORNDIKE VERBAL INTELLIGENCE…

76 FR 21379 - Agency Information Collection Activities; Proposed Collection; Comment Request; Experiment To...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-04-15

... CRCR will design and administer the study. FDA is requesting OMB approval under the PRA for the CRCR to... distribution chain (Ref. 3). The goal of the proposed project is to test, by experimental study, whether the... will be assigned to one of the following experimental conditions (consisting of vignettes in the form...

Use of a Storytelling Context to Improve Girls' and Boys' Geometry Skills in Kindergarten

ERIC Educational Resources Information Center

Casey, Beth; Erkut, Sumru; Ceder, Ineke; Young, Jessica Mercer

2008-01-01

Two studies investigated the effects of a storytelling-context for teaching geometry skills to kindergarten girls and boys. In Study 1, the story+geometry intervention consisted of an adventure story teaching geometry through part-whole-relations puzzles. Learning was assessed through transfer of skills, using a pre-/post design comparing…

Attitudes of Employees of Provincial Directorates of National Education and School Administrators towards Strategic Planning

ERIC Educational Resources Information Center

Altinkurt, Yahya

2010-01-01

The aim of the study is to determine the attitudes of employees of Provincial Directorates of National Education and school administrators towards strategic planning. The research was designed as a survey model study. The population of the research consisted of employees of Provincial Directorate of National Education of Kutahya and school…

SCALS: a fourth-generation study of assisted living technologies in their organisational, social, political and policy context.

PubMed

Greenhalgh, Trisha; Shaw, Sara; Wherton, Joe; Hughes, Gemma; Lynch, Jenni; A'Court, Christine; Hinder, Sue; Fahy, Nick; Byrne, Emma; Finlayson, Alexander; Sorell, Tom; Procter, Rob; Stones, Rob

2016-02-15

Research to date into assisted living technologies broadly consists of 3 generations: technical design, experimental trials and qualitative studies of the patient experience. We describe a fourth-generation paradigm: studies of assisted living technologies in their organisational, social, political and policy context. Fourth-generation studies are necessarily organic and emergent; they view technology as part of a dynamic, networked and potentially unstable system. They use co-design methods to generate and stabilise local solutions, taking account of context. SCALS (Studies in Co-creating Assisted Living Solutions) consists (currently) of 5 organisational case studies, each an English health or social care organisation striving to introduce technology-supported services to support independent living in people with health and/or social care needs. Treating these cases as complex systems, we seek to explore interdependencies, emergence and conflict. We employ a co-design approach informed by the principles of action research to help participating organisations establish, refine and evaluate their service. To that end, we are conducting in-depth ethnographic studies of people's experience of assisted living technologies (micro level), embedded in evolving organisational case studies that use interviews, ethnography and document analysis (meso level), and exploring the wider national and international context for assisted living technologies and policy (macro level). Data will be analysed using a sociotechnical framework developed from structuration theory. Research ethics approval for the first 4 case studies has been granted. An important outcome will be lessons learned from individual co-design case studies. We will document the studies' credibility and rigour, and assess the transferability of findings to other settings while also recognising unique aspects of the contexts in which they were generated. Academic outputs will include a cross-case analysis and progress in theory and method of fourth-generation assisted living technology research. We will produce practical guidance for organisations, policymakers, designers and service users. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

Tradeoff methods in multiobjective insensitive design of airplane control systems

NASA Technical Reports Server (NTRS)

Schy, A. A.; Giesy, D. P.

1984-01-01

The latest results of an ongoing study of computer-aided design of airplane control systems are given. Constrained minimization algorithms are used, with the design objectives in the constraint vector. The concept of Pareto optimiality is briefly reviewed. It is shown how an experienced designer can use it to find designs which are well-balanced in all objectives. Then the problem of finding designs which are insensitive to uncertainty in system parameters are discussed, introducing a probabilistic vector definition of sensitivity which is consistent with the deterministic Pareto optimal problem. Insensitivity is important in any practical design, but it is particularly important in the design of feedback control systems, since it is considered to be the most important distinctive property of feedback control. Methods of tradeoff between deterministic and stochastic-insensitive (SI) design are described, and tradeoff design results are presented for the example of the a Shuttle lateral stability augmentation system. This example is used because careful studies have been made of the uncertainty in Shuttle aerodynamics. Finally, since accurate statistics of uncertain parameters are usually not available, the effects of crude statistical models on SI designs are examined.

Satellite Power Systems (SPS) concept definition study (exhibit C)

NASA Technical Reports Server (NTRS)

Hanley, G. M.

1978-01-01

A coplanar satellite conceptual approach was defined. This effort included several trade studies related to satellite design and also construction approaches for this satellite. A transportation system, consistent with this concept, was also studied, including an electric orbit transfer vehicle and a parallel-burn heavy lift launch vehicle. Work on a solid state microwave concept continued and several alternative approaches were evaluated. Computer determination of an optimized transistor and circuit design was also continued. Experiment/verification planning resulted in the development of a total solar array and microwave technology development plan, as well as definition of near-term research to evaluate key technology issues.

Design of a biologically inspired lower limb exoskeleton for human gait rehabilitation.

PubMed

Lyu, Mingxing; Chen, Weihai; Ding, Xilun; Wang, Jianhua; Bai, Shaoping; Ren, Huichao

2016-10-01

This paper proposes a novel bionic model of the human leg according to the theory of physiology. Based on this model, we present a biologically inspired 3-degree of freedom (DOF) lower limb exoskeleton for human gait rehabilitation, showing that the lower limb exoskeleton is fully compatible with the human knee joint. The exoskeleton has a hybrid serial-parallel kinematic structure consisting of a 1-DOF hip joint module and a 2-DOF knee joint module in the sagittal plane. A planar 2-DOF parallel mechanism is introduced in the design to fully accommodate the motion of the human knee joint, which features not only rotation but also relative sliding. Therefore, the design is consistent with the requirements of bionics. The forward and inverse kinematic analysis is studied and the workspace of the exoskeleton is analyzed. The structural parameters are optimized to obtain a larger workspace. The results using MATLAB-ADAMS co-simulation are shown in this paper to demonstrate the feasibility of our design. A prototype of the exoskeleton is also developed and an experiment performed to verify the kinematic analysis. Compared with existing lower limb exoskeletons, the designed mechanism has a large workspace, while allowing knee joint rotation and small amount of sliding.

Design of a biologically inspired lower limb exoskeleton for human gait rehabilitation

NASA Astrophysics Data System (ADS)

Lyu, Mingxing; Chen, Weihai; Ding, Xilun; Wang, Jianhua; Bai, Shaoping; Ren, Huichao

2016-10-01

This paper proposes a novel bionic model of the human leg according to the theory of physiology. Based on this model, we present a biologically inspired 3-degree of freedom (DOF) lower limb exoskeleton for human gait rehabilitation, showing that the lower limb exoskeleton is fully compatible with the human knee joint. The exoskeleton has a hybrid serial-parallel kinematic structure consisting of a 1-DOF hip joint module and a 2-DOF knee joint module in the sagittal plane. A planar 2-DOF parallel mechanism is introduced in the design to fully accommodate the motion of the human knee joint, which features not only rotation but also relative sliding. Therefore, the design is consistent with the requirements of bionics. The forward and inverse kinematic analysis is studied and the workspace of the exoskeleton is analyzed. The structural parameters are optimized to obtain a larger workspace. The results using MATLAB-ADAMS co-simulation are shown in this paper to demonstrate the feasibility of our design. A prototype of the exoskeleton is also developed and an experiment performed to verify the kinematic analysis. Compared with existing lower limb exoskeletons, the designed mechanism has a large workspace, while allowing knee joint rotation and small amount of sliding.

Engineering Feasibility and Trade Studies for the NASA/VSGC MicroMaps Space Mission

NASA Technical Reports Server (NTRS)

Abdelkhalik, Ossama O.; Nairouz, Bassem; Weaver, Timothy; Newman, Brett

2003-01-01

Knowledge of airborne CO concentrations is critical for accurate scientific prediction of global scale atmospheric behavior. MicroMaps is an existing NASA owned gas filter radiometer instrument designed for space-based measurement of atmospheric CO vertical profiles. Due to programmatic changes, the instrument does not have access to the space environment and is in storage. MicroMaps hardware has significant potential for filling a critical scientific need, thus motivating concept studies for new and innovative scientific spaceflight missions that would leverage the MicroMaps heritage and investment, and contribute to new CO distribution data. This report describes engineering feasibility and trade studies for the NASA/VSGC MicroMaps Space Mission. Conceptual studies encompass: 1) overall mission analysis and synthesis methodology, 2) major subsystem studies and detailed requirements development for an orbital platform option consisting of a small, single purpose spacecraft, 3) assessment of orbital platform option consisting of the International Space Station, and 4) survey of potential launch opportunities for gaining assess to orbit. Investigations are of a preliminary first-order nature. Results and recommendations from these activities are envisioned to support future MicroMaps Mission design decisions regarding program down select options leading to more advanced and mature phases.

The Dispositions for Culturally Responsive Pedagogy Scale

ERIC Educational Resources Information Center

Whitaker, Manya C.; Valtierra, Kristina Marie

2018-01-01

Purpose: The purpose of this study is to develop and validate the dispositions for culturally responsive pedagogy scale (DCRPS). Design/methodology/approach: Scale development consisted of a six-step process including item development, expert review, exploratory factor analysis, factor interpretation, confirmatory factor analysis and convergent…

Development and Initial Psychometrics of Counseling Supervisor's Behavior Questionnaire

ERIC Educational Resources Information Center

Lee, Ahram; Park, Eun Hye; Byeon, Eunji; Lee, Sang Min

2016-01-01

This study describes the development and psychometric properties of the Counseling Supervisor's Behavior Questionnaire, designed to assess the specific behaviors of supervisors, which can be observed by supervisees during supervision sessions. Factor structure, construct and concurrent validity, and internal consistency reliability of the…

Class Syllabi, General Education, and ePortfolios

ERIC Educational Resources Information Center

Appling, Jeffrey; Gancar, Jessica; Hughes, Shiree; Saad, Alex

2012-01-01

A study of undergraduate student experience with class syllabi revealed several concerns for improvement in areas directly related to General Education and assessment strategies using electronic portfolios. We report several student interests and suggestions, including the need for consistent syllabi that contain information designed to promote…

Improvisational Practices in Elementary General Music Classrooms

ERIC Educational Resources Information Center

Gruenhagen, Lisa M.; Whitcomb, Rachel

2014-01-01

Despite historic and ongoing support for the inclusion of improvisation in the elementary general music curriculum, music educators consistently report challenges with implementation of improvisational activities in their classes. This study was designed to examine (a) the extent to which improvisational activities were occurring in the…

SCHOOL BOARD BIBLIOGRAPHY.

ERIC Educational Resources Information Center

JAMES, H. THOMAS

A COMPREHENSIVE BIBLIOGRAPHY DESIGNED TO HIGHLIGHT MAJOR ISSUES AND ASSIST PROSPECTIVE RESEARCHERS IN THE FIELD OF SCHOOL BOARD RELATIONSHIPS CONSISTS OF ABSTRACTS OF SEVEN DISSERTATIONS FROM A SERIES OF CORRELATED STUDIES SPONSORED BY THE CARNEGIE FOUNDATION AND AN ANNOTATED BIBLIOGRAPHY OF 204 BOOKS, ARTICLES, CHAPTERS, REPORTS, AND THESES.…

Medical Assisting. A Learning Guide.

ERIC Educational Resources Information Center

Meyer, Rosemarie

This competency-based, individualized learning package, consisting of 50 learning guides, is designed for use by students who are studying to become medical assistants. Included among the topics addressed in the individual learning guides are the following: using and caring for microscopes, understanding medical ethics and law, developing…

Examining the practice of generalist expertise: a qualitative study identifying constraints and solutions

PubMed Central

Reeve, Joanne; Dowrick, Christopher F; Freeman, George K; Gunn, Jane; Mair, Frances; May, Carl; Mercer, Stewart; Palmer, Victoria; Howe, Amanda; Irving, Greg; Shiner, Alice; Watson, Jessica

2013-01-01

Objectives Provision of person-centred generalist care is a core component of quality primary care systems. The World Health Organisation believes that a lack of generalist primary care is contributing to inefficiency, ineffectiveness and inequity in healthcare. In UK primary care, General Practitioners (GPs) are the largest group of practising generalists. Yet GPs fulfil multiple roles and the pressures of delivering these roles along with wider contextual changes create real challenges to generalist practice. Our study aimed to explore GP perceptions of enablers and constraints for expert generalist care, in order to identify what is needed to ensure health systems are designed to support the generalist role. Design Qualitative study in General Practice. Setting UK primary care. Main outcome measures A qualitative study – interviews, surveys and focus groups with GPs and GP trainees. Data collection and analysis was informed by Normalisation Process Theory. Design and setting Qualitative study in General Practice. We conducted interviews, surveys and focus groups with GPs and GP trainees based mainly, but not exclusively, in the UK. Data collection and analysis were informed by Normalization Process Theory. Participants UK based GPs (interview and surveys); European GP trainees (focus groups). Results Our findings highlight key gaps in current training and service design which may limit development and implementation of expert generalist practice (EGP). These include the lack of a consistent and universal understanding of the distinct expertise of EGP, competing priorities inhibiting the delivery of EGP, lack of the consistent development of skills in interpretive practice and a lack of resources for monitoring EGP. Conclusions We describe four areas for change: Translating EGP, Priority setting for EGP, Trusting EGP and Identifying the impact of EGP. We outline proposals for work needed in each area to help enhance the expert generalist role. PMID:24475347

Description of CASCOMP Comprehensive Airship Sizing and Performance Computer Program, Volume 2

NASA Technical Reports Server (NTRS)

Davis, J.

1975-01-01

The computer program CASCOMP, which may be used in comparative design studies of lighter than air vehicles by rapidly providing airship size and mission performance data, was prepared and documented. The program can be used to define design requirements such as weight breakdown, required propulsive power, and physical dimensions of airships which are designed to meet specified mission requirements. The program is also useful in sensitivity studies involving both design trade-offs and performance trade-offs. The input to the program primarily consists of a series of single point values such as hull overall fineness ratio, number of engines, airship hull and empennage drag coefficients, description of the mission profile, and weights of fixed equipment, fixed useful load and payload. In order to minimize computation time, the program makes ample use of optional computation paths.

Integration mockup and process material management system

NASA Technical Reports Server (NTRS)

Verble, Adas James, Jr.

1992-01-01

Work to define and develop a full scale Space Station Freedom (SSF) mockup with the flexibility to evolve into future designs, to validate techniques for maintenance and logistics and verify human task allocations and support trade studies is described. This work began in early 1985 and ended in August, 1991. The mockups are presently being used at MSFC in Building 4755 as a technology and design testbed, as well as for public display. Micro Craft also began work on the Process Material Management System (PMMS) under this contract. The PMMS simulator was a sealed enclosure for testing to identify liquids, gaseous, particulate samples, and specimen including, urine, waste water, condensate, hazardous gases, surrogate gasses, liquids, and solids. The SSF would require many trade studies to validate techniques for maintenance and logistics and verify system task allocations; it was necessary to develop a full scale mockup which would be representative of current SSF design with the ease of changing those designs as the SSF design evolved and changed. The tasks defined for Micro Craft were to provide the personnel, services, tools, and materials for the SSF mockup which would consist of four modules, nodes, interior components, and part task mockups of MSFC responsible engineering systems. This included the Engineering Control and Life Support Systems (ECLSS) testbed. For the initial study, the mockups were low fidelity, soft mockups of graphics art bottle, and other low cost materials, which evolved into higher fidelity mockups as the R&D design evolved, by modifying or rebuilding, an important cost saving factor in the design process. We designed, fabricated, and maintained the full size mockup shells and support stands. The shells consisted of cylinders, end cones, rings, longerons, docking ports, crew airlocks, and windows. The ECLSS required a heavier cylinder to support the ECLSS systems test program. Details of this activity will be covered. Support stands were designed and built for each module to sufficiently move and rotate each module. Secondary structures such as floors, ceilings, bulkheads, standoffs, racks, etc. were developed and built.

Within- and between-session replicability of cognitive brain processes: An MEG study with an N-back task.

PubMed

Ahonen, L; Huotilainen, M; Brattico, E

2016-05-01

In the vast majority of electrophysiological studies on cognition, participants are only measured once during a single experimental session. The dearth of studies on test-retest reliability in magnetoencephalography (MEG) within and across experimental sessions is a preventing factor for longitudinal designs, imaging genetics studies, and clinical applications. From the recorded signals, it is not straightforward to draw robust and steady indices of brain activity that could directly be used in exploring behavioral effects or genetic associations. To study the variations in markers associated with cognitive functions, we extracted three event-related field (ERF) features from time-locked global field power (GFP) epochs using MEG while participants were performing a numerical N-back task in four consecutive measurements conducted during two different days separated by two weeks. We demonstrate that the latency of the M170, a neural correlate associated with cognitive functions such as working memory, was a stable parameter and did not show significant variations over time. In addition, the M170 peak amplitude and the mean amplitude of late positive component (LPP) also expressed moderate-to-strong reliability across multiple measures over time over many sensor spaces and between participants. The M170 amplitude varied more significantly between the measurements in some conditions but showed consistency over the participants over time. In addition we demonstrated significant correlation with the M170 and LPP parameters and cognitive load. The results are in line with the literature showing less within-subject fluctuation for the latency parameters and more consistency in between-subject comparisons for amplitude based features. The within-subject consistency was apparent also with longer delays between the measurements. We suggest that with a few limitations the ERF features show sufficient reliability and stability for longitudinal research designs and clinical applications for cognitive functions in single as well as cross-subject designs. Copyright © 2016 Elsevier Inc. All rights reserved.

Is consumer response to plain/standardised tobacco packaging consistent with framework convention on tobacco control guidelines? A systematic review of quantitative studies.

PubMed

Stead, Martine; Moodie, Crawford; Angus, Kathryn; Bauld, Linda; McNeill, Ann; Thomas, James; Hastings, Gerard; Hinds, Kate; O'Mara-Eves, Alison; Kwan, Irene; Purves, Richard I; Bryce, Stuart L

2013-01-01

Standardised or 'plain' tobacco packaging was introduced in Australia in December 2012 and is currently being considered in other countries. The primary objective of this systematic review was to locate, assess and synthesise published and grey literature relating to the potential impacts of standardised tobacco packaging as proposed by the guidelines for the international Framework Convention on Tobacco Control: reduced appeal, increased salience and effectiveness of health warnings, and more accurate perceptions of product strength and harm. Electronic databases were searched and researchers in the field were contacted to identify studies. Eligible studies were published or unpublished primary research of any design, issued since 1980 and concerning tobacco packaging. Twenty-five quantitative studies reported relevant outcomes and met the inclusion criteria. A narrative synthesis was conducted. Studies that explored the impact of package design on appeal consistently found that standardised packaging reduced the appeal of cigarettes and smoking, and was associated with perceived lower quality, poorer taste and less desirable smoker identities. Although findings were mixed, standardised packs tended to increase the salience and effectiveness of health warnings in terms of recall, attention, believability and seriousness, with effects being mediated by the warning size, type and position on pack. Pack colour was found to influence perceptions of product harm and strength, with darker coloured standardised packs generally perceived as containing stronger tasting and more harmful cigarettes than fully branded packs; lighter coloured standardised packs suggested weaker and less harmful cigarettes. Findings were largely consistent, irrespective of location and sample. The evidence strongly suggests that standardised packaging will reduce the appeal of packaging and of smoking in general; that it will go some way to reduce consumer misperceptions regarding product harm based upon package design; and will help make the legally required on-pack health warnings more salient.

Is Consumer Response to Plain/Standardised Tobacco Packaging Consistent with Framework Convention on Tobacco Control Guidelines? A Systematic Review of Quantitative Studies

PubMed Central

Stead, Martine; Moodie, Crawford; Angus, Kathryn; Bauld, Linda; McNeill, Ann; Thomas, James; Hastings, Gerard; Hinds, Kate; O'Mara-Eves, Alison; Kwan, Irene; Purves, Richard I.; Bryce, Stuart L.

2013-01-01

Background and Objectives Standardised or ‘plain’ tobacco packaging was introduced in Australia in December 2012 and is currently being considered in other countries. The primary objective of this systematic review was to locate, assess and synthesise published and grey literature relating to the potential impacts of standardised tobacco packaging as proposed by the guidelines for the international Framework Convention on Tobacco Control: reduced appeal, increased salience and effectiveness of health warnings, and more accurate perceptions of product strength and harm. Methods Electronic databases were searched and researchers in the field were contacted to identify studies. Eligible studies were published or unpublished primary research of any design, issued since 1980 and concerning tobacco packaging. Twenty-five quantitative studies reported relevant outcomes and met the inclusion criteria. A narrative synthesis was conducted. Results Studies that explored the impact of package design on appeal consistently found that standardised packaging reduced the appeal of cigarettes and smoking, and was associated with perceived lower quality, poorer taste and less desirable smoker identities. Although findings were mixed, standardised packs tended to increase the salience and effectiveness of health warnings in terms of recall, attention, believability and seriousness, with effects being mediated by the warning size, type and position on pack. Pack colour was found to influence perceptions of product harm and strength, with darker coloured standardised packs generally perceived as containing stronger tasting and more harmful cigarettes than fully branded packs; lighter coloured standardised packs suggested weaker and less harmful cigarettes. Findings were largely consistent, irrespective of location and sample. Conclusions The evidence strongly suggests that standardised packaging will reduce the appeal of packaging and of smoking in general; that it will go some way to reduce consumer misperceptions regarding product harm based upon package design; and will help make the legally required on-pack health warnings more salient. PMID:24146791

Evaluation of structural design concepts for an arrow-wing supersonic cruise aircraft

NASA Technical Reports Server (NTRS)

Sakata, I. F.; Davis, G. W.

1977-01-01

An analytical study was performed to determine the best structural approach for design of primary wing and fuselage structure of a Mach 2.7 arrow wing supersonic cruise aircraft. Concepts were evaluated considering near term start of design. Emphasis was placed on the complex interactions between thermal stress, static aeroelasticity, flutter, fatigue and fail safe design, static and dynamic loads, and the effects of variations in structural arrangements, concepts and materials on these interactions. Results indicate that a hybrid wing structure incorporating low profile convex beaded and honeycomb sandwich surface panels of titanium alloy 6Al-4V were the most efficient. The substructure includes titanium alloy spar caps reinforced with boron polyimide composites. The fuselage shell consists of hat stiffened skin and frame construction of titanium alloy 6Al-4V. A summary of the study effort is presented, and a discussion of the overall logic, design philosophy and interaction between the analytical methods for supersonic cruise aircraft design are included.

Mars Aeronomy Explorer (MAX): Study Employing Distributed Micro-Spacecraft

NASA Technical Reports Server (NTRS)

Shotwell, Robert F.; Gray, Andrew A.; Illsley, Peter M.; Johnson, M.; Sherwood, Robert L.; Vozoff, M.; Ziemer, John K.

2005-01-01

An overview of a Mars Aeronomy Explorer (MAX) mission design study performed at NASA's Jet Propulsion Laboratory is presented herein. The mission design consists of ten micro-spacecraft orbiters launched on a Delta IV to Mars polar orbit to determine the spatial, diurnal and seasonal variation of the constituents of the Martian upper atmosphere and ionosphere over the course of one Martian year. The spacecraft are designed to allow penetration of the upper atmosphere to at least 90 km. This property coupled with orbit precession will yield knowledge of the nature of the solar wind interaction with Mars, the influence of the Mars crustal magnetic field on ionospheric processes, and the measurement of present thermal and nonthermal escape rates of atmospheric constituents. The mission design incorporates alternative design paradigms that are more appropriate for-and in some cases motivate-distributed micro-spacecraft. These design paradigms are not defined by a simple set of rules, but rather a way of thinking about the function of instruments, mission reliability/risk, and cost in a systemic framework.

Loss of Magnet® Designation and Changes in RN Work Engagement: A Report on How 1 Hospital's Culture Changed Over Time.

PubMed

Wonder, Amy Hagedorn; York, Jacki; Jackson, Kathryn L; Sluys, Teresa D

2017-10-01

The aim of this study was to examine the loss of Magnet® designation and how RNs' work engagement changed at 1 community hospital. The importance of RN work engagement to promote quality and safety is widely recognized in healthcare. Ongoing consistent research is critical to determine what organizational structures are needed to support RN work engagement. This was a comparative, descriptive, correlational study of RN cohorts at 2 time points: time 1 (T1), in 2011 during Magnet designation (n = 119), and time 2 (T2), in 2016, approximately 2 years after the loss of Magnet designation (n = 140). The cohort of RNs at T2 reported significantly lower work engagement in the time period after the loss of Magnet designation when compared with the RN cohort at T1 during Magnet designation (P ≤ .0002). These results provide insights for clinical leaders striving to support a culture of RN work engagement and quality care.

Psychometric evaluation of a new instrument in Spanish to measure the wellness of university nursing faculty.

PubMed

Hurtado-Pardos, Barbara; Casas, Irma; Lluch-Canut, Teresa; Moreno-Arroyo, Carmen; Nebot-Bergua, Carlos; Roldán-Merino, Juan

2018-01-02

The aim of this study was to design and validate an instrument to measure the wellness among university nursing faculty. The study was performed in two phases. Phase I consisted of the development of the instrument with discussion groups and participant consensus. We designed an instrument including the 21 items or psychosocial risk factors identified and estimated an index by evaluating the frequency and intensity of each item. The items were grouped into 3 dimensions: teaching work demands, curricular demands, and organizational difficulties. Phase II, we evaluated the psychometric properties of the tool in a sample of 263 participants. Exploratory factor analysis showed a 3-factor structure that explained 53% of the total variance. The internal consistency of the instrument was 0.91 for the whole instrument. The results indicate that the tool developed is valid and reliable and may be a good instrument to monitor the wellness of university nursing faculty.

A community survey of helicopter noise annoyance conducted under controlled noise exposure conditions

NASA Technical Reports Server (NTRS)

Fields, J. M.; Powell, C. A.

1985-01-01

Reactions to low numbers of helicopter noise events (less than 50 per day) were studied in a community setting. Community residents were repeatedly interviewed about daily noise annoyance reactions on days when helicopter noise exposures were, without the residents' knowledge, controlled. The effects of maximum noise level and number of noise events on helicopter noise annoyance are consistent with the principles contained in LEQ-based noise indices. The effect of the duration of noise events is also consistent with LEQ-based indices. After removing the effect of differences in noise levels (LEQ) there is not an important difference between reactions to impulsive and nonimpulsive types of helicopters. EPNL, where corrected for number of overflights, and LEQ are approximately equally successful in representing the characteristics of noise which are related to human response. The new type of design provided estimates of the parameters in a noise reaction model which would not obtained with a similar degree of precision from conventional study designs.

Status of experiments at LLNL on high-power X-band microwave generators

NASA Astrophysics Data System (ADS)

Houck, Timothy L.; Westenskow, Glen A.

1994-05-01

The Microwave Source Facility at the Lawrence Livermore National Laboratory (LLNL) is studying the application of induction accelerator technology to high-power microwave generators suitable for linear collider power sources. We report on the results of two experiments, both using the Choppertron's 11.4 GHz modulator and a 5-MeV, 1-kA induction beam. The first experimental configuration has a single traveling-wave output structure designed to produce in excess of 300 MW in a single fundamental waveguide. This output structure consists of 12 individual cells, the first two incorporating de-Q-ing circuits to dampen higher order resonant modes. The second experiment studies the feasibility of enhancing beam to microwave power conversion by accelerating a modulated beam with induction cells. Referred to as the `reacceleration experiment,' this experiment consists of three traveling-wave output structures designed to produce about 125 MW per output and two induction cells located between the outputs. Status of current and planned experiments are presented.

Model for teaching population health and community-based care across diverse clinical experiences.

PubMed

Van Dyk, Elizabeth J; Valentine-Maher, Sarah K; Tracy, Janet P

2015-02-01

The pillars constructivist model is designed to offer a unifying clinical paradigm to support consistent learning opportunities across diverse configurations of community and public health clinical sites. Thirty-six students and six faculty members participated in a mixed methods evaluation to assess the model after its inaugural semester of implementation. The evaluation methods included a rating scale that measures the model's ability to provide consistent learning opportunities at both population health and direct care sites, a case study to measure student growth within the five conceptual pillars, and a faculty focus group. Results revealed that the model served as an effective means of clinical education to support the use of multiple, small-scale public health sites. Although measurements of student growth within the pillars are inconclusive, the findings suggest efficacy. The authors recommend the continued use of the pillars constructivist model in baccalaureate programs, with further study of the author-designed evaluation tools. Copyright 2015, SLACK Incorporated.

Wing optimization for space shuttle orbiter vehicles

NASA Technical Reports Server (NTRS)

Surber, T. E.; Bornemann, W. E.; Miller, W. D.

1972-01-01

The results were presented of a parametric study performed to determine the optimum wing geometry for a proposed space shuttle orbiter. The results of the study establish the minimum weight wing for a series of wing-fuselage combinations subject to constraints on aerodynamic heating, wing trailing edge sweep, and wing over-hang. The study consists of a generalized design evaluation which has the flexibility of arbitrarily varying those wing parameters which influence the vehicle system design and its performance. The study is structured to allow inputs of aerodynamic, weight, aerothermal, structural and material data in a general form so that the influence of these parameters on the design optimization process can be isolated and identified. This procedure displays the sensitivity of the system design of variations in wing geometry. The parameters of interest are varied in a prescribed fashion on a selected fuselage and the effect on the total vehicle weight is determined. The primary variables investigated are: wing loading, aspect ratio, leading edge sweep, thickness ratio, and taper ratio.

Development and validation of an online interactive, multimedia wound care algorithms program.

PubMed

Beitz, Janice M; van Rijswijk, Lia

2012-01-01

To provide education based on evidence-based and validated wound care algorithms we designed and implemented an interactive, Web-based learning program for teaching wound care. A mixed methods quantitative pilot study design with qualitative components was used to test and ascertain the ease of use, validity, and reliability of the online program. A convenience sample of 56 RN wound experts (formally educated, certified in wound care, or both) participated. The interactive, online program consists of a user introduction, interactive assessment of 15 acute and chronic wound photos, user feedback about the percentage correct, partially correct, or incorrect algorithm and dressing choices and a user survey. After giving consent, participants accessed the online program, provided answers to the demographic survey, and completed the assessment module and photographic test, along with a posttest survey. The construct validity of the online interactive program was strong. Eighty-five percent (85%) of algorithm and 87% of dressing choices were fully correct even though some programming design issues were identified. Online study results were consistently better than previously conducted comparable paper-pencil study results. Using a 5-point Likert-type scale, participants rated the program's value and ease of use as 3.88 (valuable to very valuable) and 3.97 (easy to very easy), respectively. Similarly the research process was described qualitatively as "enjoyable" and "exciting." This digital program was well received indicating its "perceived benefits" for nonexpert users, which may help reduce barriers to implementing safe, evidence-based care. Ongoing research using larger sample sizes may help refine the program or algorithms while identifying clinician educational needs. Initial design imperfections and programming problems identified also underscored the importance of testing all paper and Web-based programs designed to educate health care professionals or guide patient care.

Conceptual spacecraft systems design and synthesis

NASA Technical Reports Server (NTRS)

Wright, R. L.; Deryder, D. D.; Ferebee, M. J., Jr.

1984-01-01

An interactive systems design and synthesis is performed on future spacecraft concepts using the Interactive Design and Evaluation of Advanced Systems (IDEAS) computer-aided design and analysis system. The capabilities and advantages of the systems-oriented interactive computer-aided design and analysis system are described. The synthesis of both large antenna and space station concepts, and space station evolutionary growth designs is demonstrated. The IDEAS program provides the user with both an interactive graphics and an interactive computing capability which consists of over 40 multidisciplinary synthesis and analysis modules. Thus, the user can create, analyze, and conduct parametric studies and modify earth-orbiting spacecraft designs (space stations, large antennas or platforms, and technologically advanced spacecraft) at an interactive terminal with relative ease. The IDEAS approach is useful during the conceptual design phase of advanced space missions when a multiplicity of parameters and concepts must be analyzed and evaluated in a cost-effective and timely manner.

Design optimization of condenser microphone: a design of experiment perspective.

PubMed

Tan, Chee Wee; Miao, Jianmin

2009-06-01

A well-designed condenser microphone backplate is very important in the attainment of good frequency response characteristics--high sensitivity and wide bandwidth with flat response--and low mechanical-thermal noise. To study the design optimization of the backplate, a 2(6) factorial design with a single replicate, which consists of six backplate parameters and four responses, has been undertaken on a comprehensive condenser microphone model developed by Zuckerwar. Through the elimination of insignificant parameters via normal probability plots of the effect estimates, the projection of an unreplicated factorial design into a replicated one can be performed to carry out an analysis of variance on the factorial design. The air gap and slot have significant effects on the sensitivity, mechanical-thermal noise, and bandwidth while the slot/hole location interaction has major influence over the latter two responses. An organized and systematic approach of designing the backplate is summarized.

The design of low cost structures for extensive ground arrays

NASA Technical Reports Server (NTRS)

Franklin, H. A.; Leonard, R. S.

1980-01-01

The development of conceptual designs of solar array support structures and their foundations including considerations of the use of concrete, steel, aluminum, or timber are reported. Some cost trends were examined by varying selected parameters to determine optimum configurations. Detailed civil/structural design criteria were developed. Using these criteria, eight detailed designs for support structures and foundations were developed and cost estimates were made. As a result of the study wind was identified as the major loading experienced by these low height structures, whose arrays are likely to extend over large tracts of land. Proper wind load estimating is considered essential to developing realistic structural designs and achieving minimum cost support structures. Wind tunnel testing of a conceptual array field was undertaken and some of the resulting wind design criteria are presented. The SPS rectenna system designs may be less sensitive to wind load estimates, but consistent design criteria remain important.

Effect of Audiovisual Distraction on Distress and Oxygenation Status in Children Receiving Aerosol Therapy.

PubMed

Shinta Devi, Ni Luh Putu; Nurhaeni, Nani; Hayati, Happy

Aerosol therapy, a treatment for children with disorders of the respiratory system, often causes distress, especially in young children. Distress during aerosol therapy can decrease the effectiveness of the treatment. This study aimed to determine the effect of audiovisual distraction on distress levels and oxygenation status (measured by oxygen saturation and respiratory frequency) in children who receive aerosol therapy for disorders of the respiratory system. A quasi-experimental design was employed, specifically a non-equivalent control group, pre-test-post-test design. The study sample consisted of 38 children who were divided into 2 groups (control and intervention), each group consisting of 19 children. The results of this study showed that there were significant differences in distress scores between the control group and the intervention group (p = .0001). There were also significant differences in the mean value changes in oxygenation status before and after intervention between the control and intervention groups. These findings could be used to prevent distress and increase oxygenation status in children who receive aerosol therapy.

The MSFC Collaborative Engineering Process for Preliminary Design and Concept Definition Studies

NASA Technical Reports Server (NTRS)

Mulqueen, Jack; Jones, David; Hopkins, Randy

2011-01-01

This paper describes a collaborative engineering process developed by the Marshall Space Flight Center's Advanced Concepts Office for performing rapid preliminary design and mission concept definition studies for potential future NASA missions. The process has been developed and demonstrated for a broad range of mission studies including human space exploration missions, space transportation system studies and in-space science missions. The paper will describe the design team structure and specialized analytical tools that have been developed to enable a unique rapid design process. The collaborative engineering process consists of integrated analysis approach for mission definition, vehicle definition and system engineering. The relevance of the collaborative process elements to the standard NASA NPR 7120.1 system engineering process will be demonstrated. The study definition process flow for each study discipline will be will be outlined beginning with the study planning process, followed by definition of ground rules and assumptions, definition of study trades, mission analysis and subsystem analyses leading to a standardized set of mission concept study products. The flexibility of the collaborative engineering design process to accommodate a wide range of study objectives from technology definition and requirements definition to preliminary design studies will be addressed. The paper will also describe the applicability of the collaborative engineering process to include an integrated systems analysis approach for evaluating the functional requirements of evolving system technologies and capabilities needed to meet the needs of future NASA programs.

Cryogenic Fluid Film Bearing Tester Development Study

NASA Technical Reports Server (NTRS)

Scharrer, Joseph K. (Editor); Murphy, Brian T.; Hawkins, Lawrence A.

1993-01-01

Conceptual designs were developed for the determination of rotordynamic coefficients of cryogenic fluid film bearings. The designs encompassed the use of magnetic and conventional excitation sources as well as the use of magnetic bearings as support bearings. Test article configurations reviewed included overhung, floating housing, and fixed housing. Uncertainty and forced response analyses were performed to assess quality of data and suitability of each for testing a variety of fluid film bearing designs. Development cost and schedule estimates were developed for each design. Facility requirements were reviewed and compared with existing MSFC capability. The recommended configuration consisted of a fixed test article housing centrally located between two magnetic bearings. The magnetic bearings would also serve as the excitation source.

49 CFR 229.209 - Alternative locomotive crashworthiness designs.

Code of Federal Regulations, 2012 CFR

2012-10-01

... 49 Transportation 4 2012-10-01 2012-10-01 false Alternative locomotive crashworthiness designs... Locomotive Crashworthiness Design Requirements § 229.209 Alternative locomotive crashworthiness designs. (a... locomotive crashworthiness designs which are not consistent with any FRA-approved locomotive crashworthiness...

49 CFR 229.209 - Alternative locomotive crashworthiness designs.

Code of Federal Regulations, 2011 CFR

2011-10-01

... 49 Transportation 4 2011-10-01 2011-10-01 false Alternative locomotive crashworthiness designs... Locomotive Crashworthiness Design Requirements § 229.209 Alternative locomotive crashworthiness designs. (a... locomotive crashworthiness designs which are not consistent with any FRA-approved locomotive crashworthiness...

49 CFR 229.209 - Alternative locomotive crashworthiness designs.

Code of Federal Regulations, 2014 CFR

2014-10-01

... 49 Transportation 4 2014-10-01 2014-10-01 false Alternative locomotive crashworthiness designs... Locomotive Crashworthiness Design Requirements § 229.209 Alternative locomotive crashworthiness designs. (a... locomotive crashworthiness designs which are not consistent with any FRA-approved locomotive crashworthiness...

49 CFR 229.209 - Alternative locomotive crashworthiness designs.

Code of Federal Regulations, 2013 CFR

2013-10-01

... 49 Transportation 4 2013-10-01 2013-10-01 false Alternative locomotive crashworthiness designs... Locomotive Crashworthiness Design Requirements § 229.209 Alternative locomotive crashworthiness designs. (a... locomotive crashworthiness designs which are not consistent with any FRA-approved locomotive crashworthiness...

Experimental study of a 1 MW, 170 GHz gyrotron oscillator

NASA Astrophysics Data System (ADS)

Kimura, Takuji

A detailed experimental study is presented of a 1 MW, 170 GHz gyrotron oscillator whose design is consistent with the ECH requirements of the International Thermonuclear Experimental Reactor (ITER) for bulk heating and current drive. This work is the first to demonstrate that megawatt power level at 170 GHz can be achieved in a gyrotron with high efficiency for plasma heating applications. Maximum output power of 1.5 MW is obtained at 170.1 GHz in 85 kV, 50A operation for an efficiency of 35%. Although the experiment at MIT is conducted with short pulses (3 μs), the gyrotron is designed to be suitable for development by industry for continuous wave operation. The peak ohmic loss on the cavity wall for 1 MW of output power is calculated to be 2.3 kW/cm2, which can be handled using present cooling technology. Mode competition problems in a highly over-moded cavity are studied to maximize the efficiency. Various aspects of electron gun design are examined to obtain high quality electron beams with very low velocity spread. A triode magnetron injection gun is designed using the EGUN simulation code. A total perpendicular velocity spread of less than 8% is realized by designing a low- sensitivity, non-adiabatic gun. The RF power is generated in a short tapered cavity with an iris step. The operating mode is the TE28,8,1 mode. A mode converter is designed to convert the RF output to a Gaussian beam. Power and efficiency are measured in the design TE28,8,1 mode at 170.1 GHz as well as the TE27,8,1 mode at 166.6 GHz and TE29,8,1 mode at 173.5 GHz. Efficiencies between 34%-36% are consistently obtained over a wide range of operating parameters. These efficiencies agree with the highest values predicted by the multimode simulations. The startup scenario is investigated and observed to agree with the linear theory. The measured beam velocity ratio is consistent with EGUN simulation. Interception of reflected beam by the mod-anode is measured as a function of velocity ratio, from which the beam velocity spreads are estimated. A preliminary test of the mode converter shows that the radiation from the dimpled wall launcher is a Gaussian-like beam. (Copies available exclusively from MIT Libraries, Rm. 14-0551, Cambridge, MA 02139- 4307. Ph. 617-253-5668; Fax 617-253-1690.)

Long life assurance study for manned spacecraft long life hardware. Volume 1: Summary of long life assurance guidelines

NASA Technical Reports Server (NTRS)

1972-01-01

A long life assurance program for the development of design, process, test, and application guidelines for achieving reliable spacecraft hardware was conducted. The study approach consisted of a review of technical data performed concurrently with a survey of the aerospace industry. The data reviewed included design and operating characteristics, failure histories and solutions, and similar documents. The topics covered by the guidelines are reported. It is concluded that long life hardware is achieved through meticulous attention to many details and no simple set of rules can suffice.

Effective Children's Rights Education from the Perspectives of Expert Teachers in Children's Rights Education: A Turkish Sample

ERIC Educational Resources Information Center

Öztürk, Ayse; Dogan, Gülay Özdemir

2017-01-01

The purpose of this study was to investigate Effective Children's Rights Education (ECRE) from the perspectives of classroom teachers who are experts in children's rights education (TECR). The data were collected through focus group interview method in this research designed as a case study. The sample of the study consists of six qualified…

A computer-based time study system for timber harvesting operations

Treesearch

Jingxin Wang; Joe McNeel; John Baumgras

2003-01-01

A computer-based time study system was developed for timber harvesting operations. Object-oriented techniques were used to model and design the system. The front-end of the time study system resides on the MS Windows CE and the back-end is supported by MS Access. The system consists of three major components: a handheld system, data transfer interface, and data storage...

Procedural Influence on Internal and External Assessment Scores of Undergraduate Vocational and Technical Education Research Projects in Nigerian Universities

ERIC Educational Resources Information Center

A. C., John; Manabete, S. S.

2015-01-01

This study sought to determine the procedural influence on internal and external assessment scores of undergraduate research projects in vocational and technical education programmes in the university under study. A survey research design was used for the conduct of this study. The population consisted of 130 lecturers and 1,847 students in the…