1,722,928 research outputs found
Electric Driven Heat Pumps in Distillation Processes
No full textRadian Corporation, under contract to the Electric Power Research Institute, has recently completed a study of the potential range of application for retrofitting electric driven heat pumps to existing distillation columns. A computerized evaluation program was developed, consisting of simulation, cost estimation, and economics analysis. The simulations were done using the PROCESS simulation package, while the cost and economics analysis routines were developed by Radian.
This paper summarizes the results of the evaluations of retrofits to four generic distillation processes. In addition, the bases of the evaluation programs and the results of several peripheral tasks are described briefly
RADIAN Version 2.04 Benutzerhandbuch
No full textRADIAN steht für RAdar Image ANalysis und ist eine vom Institut für Hochfrequenztechnik des DLR e.V. entwickelte Software, welche speziell im Bereich der militärischen Radar-Bildauswertung eingesetzt wird.
Die Entwicklung wurde im Jahr 2009 begonnen. Die Software-Versionen der ersten Generation wurden als Erweiterungen der quelloffenen Bildverarbeitungs-Software ImageJ realisiert. Seit 2016 wurde RADIAN komplett überarbeitet und von ImageJ entkoppelt. Die aktuelle Version nutzt nach wie vor ImageJ zur primären Visualisierung von Bilddaten, jedoch wurden bereits Demonstratoren für die alternative Visualisierung entwickelt und in RADIAN experimentell eingebettet.
Das Benutzerhandbuch beschreibt die wichtigsten Funktionen und die Bedienung der Software in der aktuellen Version 2.04
Demo 05-12 Radian Disc
No full textThis graphics demonstration illustrates the definition of the radian and shows that the circumference of a circle is 6.28 times its radius. Lengths of one radius are bent and placed onto the circumference of a circle, illustrating the definition of the radian. After six radii are placed onto the circle, the remaining part of the circumference is 0.28 of one radius, as shown in Figure 1
Developing the Concept of a Radian
No full textWhether you are teaching trigonometry for the first time or you have taught the subject for years, you may be wondering how to get your students more involved in understanding the meaning of a radian. How can you increase student engagement while making radian measures of angles meaningful in a way that provides a solid foundation for future mathematical learning?</jats:p
Preservice Mathematics Teachers’ Conceptions of Radian Angle Measure
No full text
Radian angle measure is central to learning trigonometry, with researchers providing evidence that a coherent understanding of radian contributes to a coherent understanding of trigonometric and inverse trigonometric functions. However, there are few opportunities for students to engage with curricular situations that involve radian angle measure. The purpose of this dissertation is to explore and provide insights into preservice mathematics teachers’ (PMTs’) conceptions of radian angle measure using three curricular situations. The first chapter reviews the relevant literature, which reported that PMTs’ conceptions of radian angle measure involve angles measured in terms of π, in relation to degrees, and in relation to the unit circle. In chapter two, I explored PMTs’ conceptions of radian angle measure using textbook representations. Seven PMTs participated in a think-aloud semi-structured interviews, where they defined radian angle measure from six textbook diagrams of radian, including a diagram of the unit circle. In chapter three, building on literature that reported that PMTs’ conceptions of radian angle measure involve relating radian to degrees, I explored how PMTs conceptualize this relationship. Five PMTs participated in semi-structured interviews, where they described radian angle measure given the angle measure in degrees. In chapter four, I explored the PMTs’ conceptions of radian angle measure given a novel context. Four PMTs participated in semi-structured virtual interviews, where they engaged with a digital activity that involves radian angle measure in the context of light reflection. Some of the dissertation’s findings align with previous research, where PMTs’ conceptualized radian angle measure in relation to the unit circle. However, this dissertation provides empirical evidence of why the PMTs refer to the unit circle. The PMTs acknowledged knowing the unit circle from memorization, but also explained that the purpose for using the unit circle is efficiency. At the same time, the PMTs acknowledged limitations in the unit circle and in their conceptions of it. Overall findings from the dissertation demonstrate the complexity of PMTs’ conceptions of radian angle measure. The PMTs’ conceptions were reported as concept definitions, ways of thinking, and spatial ways of thinking. The PMTs demonstrated flexibility with reasoning about radian angle measure using foundational conceptions in learning higher mathematics topics (e.g., proportional reasoning concepts, spatial ways of thinking). By positioning the PMTs as knowers and thinkers with valuable insights to provide, I was able to uncover and report a collection of conceptions that were demonstrated by PMTs when a curricular situation involved radian angle measure. The findings from this dissertation extend existing research that explored conceptions of angle measure and radian angle measure by reporting PMTs’ conceptions of radian angle measure given three different curricular situations. While there is still much that needs to be investigated about complexities in PMTs’ conceptions of radian angle measure, this dissertation represents one step toward providing insights about those complexities. </p
Pre-service mathematics teachers' concept images of radian
No full textThis study investigates pre-service mathematics teachers' concept images of radian and possible sources of such images. A multiple-case study was conducted for this study. Forty-two pre-service mathematics teachers completed a questionnaire, which aims to assess their understanding of radian. Six of them were selected for individual interviews on the basis of theoretical sampling. The data indicated that participants' concept images of radian were dominated by their concept images of degree. As the data in this study suggested, pre-service mathematics teachers were reluctant to accept trigonometric functions with the inputs of real numbers but rather they use value in degrees. More interestingly, they have two distinct images of π : π as an angle in radian and π as an irrational number
Introducing Radian: A Community-curated Hub for All Things Data
No full textPresentation given at the Force 2017 conference in Berlin, Germany on Radian, a community effort to increase the discovery and reuse of data resources. Use Radian to discover ideas and share resources about data science, visualization, data management, data policy, and applications of data for the public good
Recommended from our members
Fundamental investigation of duct/ESP phenomena
Full text linkRadian Corporation was contracted to investigate duct injection and ESP phenomena in a 1.7 MW pilot plant constructed for this test program. This study was an attempt to resolve problems found in previous studies and answer remaining questions for the technology using an approach which concentrates on the fundamental mechanisms of the process. The goal of the study was to obtain a better understanding of the basic physical and chemical phenomena that control: (1) the desulfurization of flue gas by calcium-based reagent, and (2) the coupling of an existing ESP particulate collection device to the duct injection process. Process economics are being studied by others. (VC
Konflik Sosial dalam Kumpulan Cerpen Pada Suatu Hari, Ada Ibu dan Radian (Tinjauan Sosiologi Sastra)
No full textPenelitian ini meneliti permasalahan sosial dalam Kumpulan Cerpen Pada Suatu
Hari, Ada Ibu dan Radian dengan menggunakan teori Sosiologi Sastra. Penelitian ini
mengungkapkan, (1) unsur instrinsik membangun makna kumpulan cerpen Pada Suatu
Hari, Ada Ibu dan Radian, dan (2) konflik-konflik sosial dalam kumpulan cerpen Pada
Suatu Hari, Ada Ibu dan Radian. Metode yang digunakan adalah metode kualitatif
deskriptif.
Penelitian ini menyimpulkan bahwa kumpulan cerpen Pada Suatu Hari, Ada Ibu
dan Radian berisi masalah-masalah sosial yang terjadi dimasyarakat. Konflik-konflik
sosial tersebut yaitu mengenai kekerasan, korupsi, dan kemiskinan
Radian: Visual Exploration of Traceroutes
No full textSeveral projects deploy probes in the Internet. Probes are systems that continuously perform traceroutes and other networking measurements (e.g., ping) towards selected targets. Measurements can be stored and analyzed to gain knowledge on several aspects of the Internet, but making sense of such data requires suitable methods and tools for exploration and visualization. We present Radian, a tool that allows to visualize traceroute paths at different levels of detail and to animate their evolution during a selected time interval. We also describe extensive tests of the tool using traceroutes performed by RIPE Atlas Internet probes
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