scholarly journals Modeling of Drift Effects on Solar Tower Concentrated Flux Distributions

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Luis O. Lara-Cerecedo ◽  
Isaias Moreno-Cruz ◽  
Nun Pitalúa-Diaz ◽  
Camilo A. Arancibia-Bulnes
Keyword(s):  
Flux Distribution ◽  
Error Function ◽  
Tracking Error ◽  
Real Field ◽  
Analytic Approximation ◽  
Error Sources ◽  
Drift Model ◽  
The Individual ◽  
Individual Flux ◽  
The Ideal

A novel modeling tool for calculation of central receiver concentrated flux distributions is presented, which takes into account drift effects. This tool is based on a drift model that includes different geometrical error sources in a rigorous manner and on a simple analytic approximation for the individual flux distribution of a heliostat. The model is applied to a group of heliostats of a real field to obtain the resulting flux distribution and its variation along the day. The distributions differ strongly from those obtained assuming the ideal case without drift or a case with a Gaussian tracking error function. The time evolution of peak flux is also calculated to demonstrate the capabilities of the model. The evolution of this parameter also shows strong differences in comparison to the case without drift.

The Republic

2019 ◽  
pp. 205-229
Author(s):  
Dominic Scott
Keyword(s):  
Political Theory ◽  
Left Behind ◽  
Ideal State ◽  
The Republic ◽  
Individual Justice ◽  
The Individual ◽  
Political Right ◽  
First Time ◽  
The Ideal

This chapter presents a reading of Plato’s Republic. The Republic is among Plato’s most complex works. From its title, the first-time reader will expect a dialogue about political theory, yet the work starts from the perspective of the individual, coming to focus on the question of how, if at all, justice contributes to an agent’s happiness. Only after this question has been fully set out does the work evolve into an investigation of politics—of the ideal state and of the institutions that sustain it, especially those having to do with education. But the interest in individual justice and happiness is never left behind. Rather, the work weaves in and out of the two perspectives, individual and political, right through to its conclusion. All this may leave one wondering about the unity of the work. The chapter shows that, despite the enormous range of topics discussed, the Republic fits together as a coherent whole.

Embodying the culture of achievement: Culture between illness and perfection is a ‘thin line’ – obtaining the ideal female body as an act of achievement

2021 ◽  
pp. 1354067X2110040
Author(s):  
Josefine Dilling ◽  
Anders Petersen
Keyword(s):  
Experimental Study ◽  
Human Body ◽  
Female Body ◽  
The Body ◽  
Thin Line ◽  
Complex Processes ◽  
The Individual ◽  
Different Levels ◽  
The Ideal ◽  
Body Ideals

In this article, we argue that certain behaviour connected to the attempt to attain contemporary female body ideals in Denmark can be understood as an act of achievement and, thus, as an embodiment of the culture of achievement, as it is characterised in Præstationssamfundet, written by the Danish sociologist Anders Petersen (2016) Hans Reitzels Forlag . Arguing from cultural psychological and sociological standpoints, this article examines how the human body functions as a mediational tool in different ways from which the individual communicates both moral and aesthetic sociocultural ideals and values. Complex processes of embodiment, we argue, can be described with different levels of internalisation, externalisation and materialisation, where the body functions as a central mediator. Analysing the findings from a qualitative experimental study on contemporary body ideals carried out by the Danish psychologists Josefine Dilling and Maja Trillingsgaard, this article seeks to anchor such theoretical claims in central empirical findings. The main conclusions from the study are used to structure the article and build arguments on how expectations and ideals expressed in an achievement society become embodied.

scholarly journals Correlation analysis of resected breast tissue and implant volume after mastectomy and its association with breast density

2021 ◽  
Author(s):  
Wolfram Malter ◽  
Bo Jan Bachmann ◽  
Barbara Krug ◽  
Martin Hellmich ◽  
Max Zinser ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Breast Density ◽  
Breast Tissue ◽  
Mathematical Function ◽  
Breast Cancer Patients ◽  
Tissue Weight ◽  
Implant Selection ◽  
Volume Measurements ◽  
The Individual ◽  
The Ideal

Abstract Background The current methods for calculating the ideal implant volume for breast reconstruction are based on pre- or intraoperative volume measurements of the existing breast volume and do not take into account the individual breast density of the woman. This study aims is to identify objective parameters that can help to improve the optimal implant selection. Materials and methods This retrospective analysis includes 198 breast cancer patients who underwent mastectomy. Breast densities (ACR) measured in mammography and MRI were compared with the removed breast tissue weight and volume of the implants used. In addition, the resected weight was compared directly with the implant volume to calculate a mathematical function. Results There was no significant correlation between the ACR values and the resected weights [correlation coefficient: mammography:− 0.117 (p = 0.176), MRI − 0.033 (p = 0.756)]. A negative correlation between the implant volumes and both imaging methods could be demonstrated [correlation coefficient: mammography − 0.268; p = 0.002; MRI was − 0.200 (p = 0.055)]. A highly significant correlation between the resected weights and the implant volumes (correlation coefficient 0.744; p < 0.001) was observed. This correlation corresponds to a power function (y = 34.71 x0.39), in which any resected weight can be used for the variable x to calculate the implant volume. Conclusion We were able to show that there is a significant correlation between the resected breast tissue and the implant volume. With our novel potency function, the appropriate implant volume can be calculated for any resected weight making it easier for the surgeon to choose a fitting implant in a simple and more objective manner.

Wavelet Filter Approach for GPS Attitude Tracking System on Ship

2010 ◽  
Vol 450 ◽  
pp. 552-555
Author(s):  
Ping Wang ◽  
Kai Xue ◽  
Qiu Hong Li
Keyword(s):  
High Frequency ◽  
Tracking System ◽  
Tracking Error ◽  
Low Frequency ◽  
Attitude Measurement ◽  
Visual Effects ◽  
Error Sources ◽  
Attitude Tracking ◽  
Servo Mechanism ◽  
Filter Approach

GPS attitude tracking system on the ship is a servo mechanism which could be used for counteracting the effects of the ship’s pitch and roll. But the attitude measurement precision of ship is more important to the tracking precision of the servo mechanism. As one of the major error sources, the noises of GPS attitude measurement bring out the steady tracking error of the tracking servo mechanism. To reduce the steady error due to the noise, the threshold noise removing method of wavelet is used to eliminate the noise. And the better result with the meaning of standard deviation and the better visual effects could be gotten by using the method. The signals of the processed high frequency and the retained low frequency could be reconstructed with the original signals. Therefore, the signals after noise removing could be obtained. The threshold noise removing method of wavelet used to remove the noise of GPS attitude information in the paper is of great value in practice.

Error Analysis of a Mobile Terrestrial LiDAR System

GEOMATICA ◽  
2014 ◽  
Vol 68 (3) ◽  
pp. 183-194 ◽  
Author(s):  
M. Leslar ◽  
B. Hu ◽  
J.G. Wang
Keyword(s):  
Point Cloud ◽  
Point Clouds ◽  
Sensitivity Study ◽  
Error Sources ◽  
Terrestrial Lidar ◽  
Lever Arm ◽  
Ideal Situation ◽  
Individual Variables ◽  
The Individual ◽  
Source Of Error

The understanding of the effects of error on Mobile Terrestrial LiDAR (MTL) point clouds has not increased with their popularity. In this study, comprehensive error analyses based on error propagation theory and global sensitivity study were carried out to quantitatively describe the effects of various error sources in a MTL system on the point cloud. Two scenarios were envisioned; the first using the uncertainties for measurement and calibration variables that are normally expected for MTL systems as they exist today, and the second using an ideal situation where measurement and calibration values have been well adjusted. It was found that the highest proportion of error in the point cloud can be attributed to the boresight and lever arm parameters for MTL systems calibrated using non-rigours methods. In particular, under a loosely controlled error condition, the LiDAR to INS Z lever arm and the LiDAR to INS roll angle contributed more error in the output point cloud than any other parameter, including the INS position. Under tightly controlled error conditions, the INS position became the dominant source of error in the point cloud. In addition, conditional variance analysis has shown that the majority of the error in a point cloud can be attributed to the individual variables. Errors caused by the interactions between the diverse variables are minimal and can be regarded as insignificant.

scholarly journals Accuracy of Wind Observations from Open-Ocean Buoys: Correction for Flow Distortion

2020 ◽  
Vol 37 (4) ◽  
pp. 687-703 ◽  
Author(s):  
Michael Schlundt ◽  
J. Thomas Farrar ◽  
Sebastien P. Bigorre ◽  
Albert J. Plueddemann ◽  
Robert A. Weller
Keyword(s):  
Flow Distortion ◽  
Error Sources ◽  
Neutral Winds ◽  
Flow Simulations ◽  
Temporal Sampling ◽  
Empirical Correction ◽  
The Individual ◽  
Wind Vane ◽  
Subsequent Comparison ◽  
Good Agreement

AbstractThe comparison of equivalent neutral winds obtained from (i) four WHOI buoys in the subtropics and (ii) scatterometer estimates at those locations reveals a root-mean-square (RMS) difference of 0.56–0.76 m s−1. To investigate this RMS difference, different buoy wind error sources were examined. These buoys are particularly well suited to examine two important sources of buoy wind errors because 1) redundant anemometers and a comparison with numerical flow simulations allow us to quantitatively assess flow distortion errors, and 2) 1-min sampling at the buoys allows us to examine the sensitivity of buoy temporal sampling/averaging in the buoy–scatterometer comparisons. The interanemometer difference varies as a function of wind direction relative to the buoy wind vane and is consistent with the effects of flow distortion expected based on numerical flow simulations. Comparison between the anemometers and scatterometer winds supports the interpretation that the interanemometer disagreement, which can be up to 5% of the wind speed, is due to flow distortion. These insights motivate an empirical correction to the individual anemometer records and subsequent comparison with scatterometer estimates show good agreement.

scholarly journals Young People: Between Literature and Advanced Technologies

2017 ◽  
Vol 1 (1) ◽  
pp. 13-23
Author(s):  
Ahmad Idris Asmaradhani
Keyword(s):  
Life Choices ◽  
Face To Face ◽  
Human Essence ◽  
The Past ◽  
Technological Advances ◽  
The World ◽  
Simple Question ◽  
The Media ◽  
The Individual ◽  
The Ideal

In the eyes of literature, existentialist thinkers focus on the question of concrete human existence and the conditions of this existence rather than hypothesizing a human essence, stressing that the human essence is determined through life choices. The ideal, however, is that humans exist in a state of distance from the world that they nonetheless remain in the midst of. This distance is what enables humans to project meaning into the disinterested world of in-itselfs. This projected meaning remains fragile, constantly facing breakdown for any reason— from a tragedy to a particularly insightful moment. In such a breakdown, humans are put face to face with the naked meaninglessness of the world, and the results can be devastating. It is porposed that literature and the media combined have a powerful impact on those who wish to truly realize and understand their message. By studying, reading, learning, experiencing, and knowing the culture of the present and those cultures of the past then one can understand the ideas of life and how the two work together to help us better understand each other and ourselves. In what ways our present culture, our technological advances, and the media shape who we are as individuals is not a simple question. The answer seems to elusively hide in a world filled with cultural complexities. But, it is no secret to find that literature is a source of power. It does influence, guide, and shape the human become as they continue their journey through life. Hence, since human are never without the influence of literature, they will always have factors working to modify the human being. However, it is their choice as to how they internalize what they are exposed to, and in turn, it is up to them to determine the individual that ultimately prevails.

The Ethical Views of Maimonides within the context of Islamicate Civilization

1991 ◽  
pp. 13-32
Author(s):  
Lawrence V. Berman
Keyword(s):  
Nicomachean Ethics ◽  
Jewish Law ◽  
Major Theme ◽  
Major Topic ◽  
Practical Activity ◽  
Central Figure ◽  
The Individual ◽  
Guide Of The Perplexed ◽  
Underlying Theme ◽  
The Ideal

This chapter examines the ethical views of Maimonides. Aristotle’s Nicomachean Ethics had a decisive influence on Maimonides’ views, as did concepts found in biblical, talmudic, and post-talmudic literature. A major topic discussed in the Ethics is the goal for man, in general and in particular, aside from the importance of this subject for determining the kind of life the individual should pursue. A second major theme of the Ethics is the nature of the excellences or virtues of man in relation to practical activity and thinking. An underlying theme of the Ethics is that the happiness of the individual is ensured by proper laws which habituate the individual to proper behaviour in accordance with man’s nature. Maimonides’ principal works are his Commentary on the Mishnah, his Code of Jewish Law (Mishneh Torah), and his Guide of the Perplexed. In these works, which span Maimonides’ productivity over the course of his lifetime, the influence of the Ethics is marked. Thus, one sees how a central figure of Islamicate civilization, heir to the best in that civilization of an intellectual cast, was none the less receptive to the important influence of the Ethics. The chapter then discusses Maimonides’ concept of the ideal man in the light of the Ethics.

scholarly journals E-books for children with autism: Best read alone or with a therapist?

2020 ◽  
Vol 36 (1) ◽  
pp. 19-32
Author(s):  
Erin Soares ◽  
Therese Miller ◽  
Kathleen Ciffone ◽  
Kirsten Read
Keyword(s):  
Children With Autism ◽  
Autism Spectrum ◽  
Ideal Condition ◽  
Storybook Reading ◽  
Applied Behavioral Analysis ◽  
Story Reading ◽  
Children With Asd ◽  
Shared Storybook Reading ◽  
The Individual ◽  
The Ideal

Children with autism spectrum disorder (ASD) seemingly prefer tablets to other methods of intervention, though professionals posit that a therapist’s presence is beneficial. In this experiment, two unique e-stories were created specifically for children with ASD. Ten children with low- or nonverbal ASD heard each story presented on an iPad; one narrated through the iPad, and one read by a therapist trained in Applied Behavioral Analysis (ABA). The within-participants design enabled researchers to measure the individual benefit of each type of story reading. After hearing each book, participants were tested on their comprehension via multiple choice, sequencing, and open-ended questions. Results indicated that the ideal condition for these young children with low- and nonverbal ASD was the therapist-read condition. These findings suggest that simple stories presented on a rewarding platform, with the minimally intrusive assistance of a therapist, provide young, verbally-challenged children with ASD with a foundation for receiving the benefits of shared storybook reading.

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