scholarly journals Achieving of Magnus Effect with Agros Suite

2021 ◽  
Author(s):  
Aleksandr Lukin ◽  
Galina Demidova ◽  
Anton Rassõlkin
Keyword(s):  
Personal Computer ◽  
Research Question ◽  
The Body ◽  
Control Algorithms ◽  
Computational Power ◽  
Lifting Force ◽  
Revolution Speed ◽  
Physical Problems ◽  
Magnus Effect ◽  
Result Analysis

When the rotating body gets into the ambiance flow appears the lifting force, called Magnus Effect. That lifting force may be controlled by changing the revolution speed of the body. That phenomenon uses in many engineering applications like wind turbines and marine ships. In this paper, the Magnus Effect simulation is achieved with Agros Suite, a multiplatform application for the solution of physical problems. The article presents the nature of the Magnus Effect and discusses possible applications in engineering. The research question is focused on demonstrating the Magnus Effect with Agros Suite and evaluating the computational power of the personal computer that runs the simulation. The simulation is made keeping in mind the possible application of the Agros Suite tools for Magnus-Effect-based wind generator control algorithms optimization. The simulation result analysis shows that Agros Suite is a reliable tool in accessing and simulation of such phenomena.

scholarly journals Spinning rough disc moving in a rarefied medium

2010 ◽  
Vol 466 (2119) ◽  
pp. 2033-2055 ◽  
Author(s):  
Alexander Plakhov ◽  
Tatiana Tchemisova ◽  
Paulo Gouveia
Keyword(s):  
The Body ◽  
Two Dimensional ◽  
Zero Temperature ◽  
Optimal Mass Transport ◽  
Dense Gases ◽  
Magnus Effect ◽  
Inverse Effect ◽  
Transversal Force ◽  
The Moment ◽  
Complementary Mechanism

We study the Magnus effect: deflection of the trajectory of a spinning body moving in a gas. It is well known that in rarefied gases, the inverse Magnus effect takes place, which means that the transversal component of the force acting on the body has opposite signs in sparse and relatively dense gases. The existing works derive the inverse effect from non-elastic interaction of gas particles with the body. We propose another (complementary) mechanism of creating the transversal force owing to multiple collisions of particles in cavities of the body surface. We limit ourselves to the two-dimensional case of a rough disc moving through a zero-temperature medium on the plane, where reflections of the particles from the body are elastic and mutual interaction of the particles is neglected. We represent the force acting on the disc and the moment of this force as functionals depending on ‘shape of the roughness’, and determine the set of all admissible forces. The disc trajectory is determined for several simple cases. The study is made by means of billiard theory, Monge–Kantorovich optimal mass transport and by numerical methods.

scholarly journals Decline in body condition in the Antarctic minke whale (Balaenoptera bonaerensis) in the Southern Ocean during the 1990s

Polar Biology ◽  
2021 ◽  
Vol 44 (2) ◽  
pp. 259-273
Author(s):  
Céline Cunen ◽  
Lars Walløe ◽  
Kenji Konishi ◽  
Nils Lid Hjort
Keyword(s):  
Model Selection ◽  
Body Condition ◽  
Model Building ◽  
Research Question ◽  
Information Criterion ◽  
The Body ◽  
Antarctic Minke Whale ◽  
Minke Whales ◽  
Balaenoptera Bonaerensis ◽  
The Antarctic

AbstractChanges in the body condition of Antarctic minke whales (Balaenoptera bonaerensis) have been investigated in a number of studies, but remain contested. Here we provide a new analysis of body condition measurements, with particularly careful attention to the statistical model building and to model selection issues. We analyse body condition data for a large number (4704) of minke whales caught between 1987 and 2005. The data consist of five different variables related to body condition (fat weight, blubber thickness and girth) and a number of temporal, spatial and biological covariates. The body condition variables are analysed using linear mixed-effects models, for which we provide sound biological motivation. Further, we conduct model selection with the focused information criterion (FIC), reflecting the fact that we have a clearly specified research question, which leads us to a clear focus parameter of particular interest. We find that there has been a substantial decline in body condition over the study period (the net declines are estimated to 10% for fat weight, 7% for blubber thickness and 3% for the girth). Interestingly, there seems to be some differences in body condition trends between males and females and in different regions of the Antarctic. The decline in body condition could indicate major changes in the Antarctic ecosystem, in particular, increased competition from some larger krill-eating whale species.

Beyond censorship: politics, teens, and ELA teacher candidates

2017 ◽  
Vol 16 (3) ◽  
pp. 303-318 ◽  
Author(s):  
Denise Dávila ◽  
Meghan E. Barnes
Keyword(s):  
Teacher Candidates ◽  
English Language ◽  
Teacher Education Program ◽  
Research Question ◽  
The Body ◽  
Data Set ◽  
Secondary English ◽  
Content Type ◽  
Political Issues ◽  
Practical Experiences

Purpose Grounded in the scholarship addressing teacher self-censorship around controversial topics, this paper aims to investigate a three-part research question: How do secondary English language arts (ELA) teacher–candidates (TCs) in the penultimate semester of their undergraduate teacher education program position political texts/speeches, interpret high school teens’ political standpoints and view the prospects of discussing political texts/speeches with students? The study findings provide insights to the ways some TCs might position themselves as novice ELA teachers relative to political texts/speeches, students, colleagues and families in their future school communities. Design/methodology/approach Audio-recorded data from whole-class and small-group discussions were coded for TCs’ positioning of political texts/speeches, interpretations of teens’ political standpoints and viewpoints on discussing with students President Obama’s speech, “A More Perfect Union” (“A.M.P.U.”) The coded data set was further analyzed to identify themes across the TCs’ perspectives. Findings The data set tells the story of a group of TCs whose positionalities, background knowledge and practical experiences in navigating divergent perspectives would influence both their daily selection and censorship of political texts/speeches like “A.M.P.U.” and their subsequent willingness to guide equitable yet critical conversations about controversial issues in the secondary ELA classroom. Originality/value In advance of the 2018 midterm elections, this paper considers how the common core state standards’ (CCSS) recommendations to include more nonfiction documents in ELA instruction positions ELA teachers to provide interdisciplinary support in helping students think critically about political issues. It expands on the body of scholarship that, thus far, has been primarily grounded in the research on social studies instruction.

scholarly journals Digital costume sketching through embodied awareness

2019 ◽  
Vol 4 (2) ◽  
pp. 229-241 ◽  
Author(s):  
Kirsi Manninen
Keyword(s):  
Mixed Method ◽  
Research Question ◽  
Costume Design ◽  
The Body ◽  
Digital Medium ◽  
Doctoral Research ◽  
Methodological Choices ◽  
Method Approach ◽  
Initial Results

This article presents a method for costume design, where empathy and embodiment are used as methodological choices by the designer in the character-creation process. In creating references for the sketching process, costume designers combine photos in which they portray themselves as the character that they imagine. These role-selfies, taken with a handheld tablet, work as starting points for the sketching procedure. The material for the present study is collected from MA costume design students who participated in digital character-creation courses at Aalto University, in Helsinki, Finland, and is a part of doctoral research by the author. The data are collected through a mixed-method approach and is organized as a case study investigating the experiences of using the body as a source for costume design. The research question in this study is as follows: does an awareness of one’s own body facilitate the sketching process? The initial results show that the research participants consider the method useful because it enables them to experience a stronger bodily connection with the digital medium, the imagined design and the emerging character in the costume sketching process. Hence, the findings of this study can be used to develop design and teaching practices not only in the field of costume design but also in other design processes involving character creation.

scholarly journals Confronting Cultural Barriers in Public Speaking through Multiple Learning Strategies: A Case of Indonesian EFL Learners

2020 ◽  
Vol 32 (1) ◽  
pp. 51
Author(s):  
Concilianus Laos Mbato
Keyword(s):  
Learning Strategies ◽  
Mixed Methods Research ◽  
Public Speaking ◽  
Research Question ◽  
The Body ◽  
Cultural Barriers ◽  
Independent Learning ◽  
Efl Students ◽  
Public Speakers ◽  
Speaking Skills

Cultural barriers, anxiety and lack of English competence may lead to EFL students’ failures in public peaking. Conducive learning environments, right coaching and learning strategies are likely to increase the possibility of students’ success. This research aimed to investigate whether the implementation of multiple learning strategies empowered Indonesian EFL students’ public speaking skills. 56 students enrolled in three public speaking classes of Sanata Dharma University, Yogyakarta in the academic year 2017-2018 participated in the research. One overriding research question was postulated, i.e., to what extent does the implementation of multiple learning strategies empower students’ public speaking skills? To answer the question, classroom mixed-methods research was employed where students filled out four different questionnaires and submitted focus group discussion (FGD) results at the end of the semester. Quantitative and qualitative data analyses indicated that students had very high perceptions about the use of and the combinations of reflections, peer-, teacher-, and self-assessments, independent learning plans and activities. They believed that multiple learning strategies implemented in the Public Speaking Class enabled them to be independent, responsible, and better learners. They also acknowledged becoming more confident and better public speakers. This study contributes to the body of knowledge in public speaking in two important ways. First, learning to speak in public for non-native speakers of English should begin with raising their awareness about cultural barriers that might inhibit the development of the necessary skills in public speaking. Second, teaching public speaking to EFL students requires the adoption of multiple learning strategies including strategies to confront imminent cultural barriers. This research, therefore, urges public speaking trainers and teachers in EFL settings to include intercultural understanding and multiple learning strategies in their public speaking classes in order to empower students’ public speaking skills

scholarly journals Implementasi Prinsip Fair Trade oleh The Body Shop sebagai Upaya Peningkatan Kesejahteraan Masyarakat Rwanda

2020 ◽  
Vol 2 (2) ◽  
pp. 32-46
Author(s):  
Kathleen Mintarja ◽  
Priscilia Christian Kadim ◽  
Stella Claresta Alexander
Keyword(s):  
Multinational Corporations ◽  
Fair Trade ◽  
Financial Stability ◽  
Research Question ◽  
The Body ◽  
Living Standard ◽  
Trade Theory ◽  
Body Shop ◽  
The Body Shop

The second half of the twentieth century witnessed unprecedented growth in the number of international actors. There has been a dramatic increase in the number of non-state actors that, on many occasions, helped solve problems and improve lives. This makes the responsibility of people’s welfare no longer only held by the government. One of the most prominent examples is the role of Body Shop on improving the living standard of Rwandan. Twenty four years after the genocide that killed almost 800,000 people, the country of Rwanda is rebuilding with the support of international communities, including multinational corporations. The Body Shop’s Community Trade commitment has been a key part of bringing local producers into international supply chains and empowering them. Therefore, the research question in this paper is “How is the role of The Body Shop on implementing fair trade principles towards the Rwandan society?” To answer the research question, the authors use several theories and concepts; such as pluralism, multinational companies, and fair trade theory. In addition, the research method to be used by the authors is a qualitative study method. This research found that The Body Shop has launched a Moringa Community Trade program as an embodiment of efforts to improve the welfare of Rwandan people after the genocide occurred. This community trade initiative aims to be one small step forward to achieve financial stability for the people currently living and working in Rwanda.

Computer system for metrological testing of location sensors used to monitor the patient's condition in magnetotherapy

2021 ◽  
Author(s):  
S.G. Gurzhin ◽  
V.L. Nguyen ◽  
A.V. Shulyakov
Keyword(s):  
Personal Computer ◽  
Physiological State ◽  
Objective Assessment ◽  
Metrological Certification ◽  
Linear Displacement ◽  
Operating Conditions ◽  
The Body ◽  
Measuring Instruments ◽  
Virtual Device ◽  
The Law

Non-contact monitoring of vital signs of a person is a reliable and safe way of promptly obtaining objective diagnostic information about the current physiological state of a patient during surgical operations, physiotherapeutic procedures or during sleep. The absence of direct contact of the sensors with the patient's body makes it possible to exclude the influence of a number of interfering factors, such as a violation or weakening of contact, which can lead to a deterioration in the quality of signals from the output of the sensors, a long-term location of the sensors on the body can have a psychological effect on the patient, changing his condition and thereby distorting the treatment method, etc. In order for the results of monitoring and diagnostics to be reliable and guaranteed accurate, it is necessary to carry out periodic metrological certification of location sensors, especially since many of them are of foreign production and their characteristics are either not standardized or do not meet the requirements of their operating conditions. Therefore, the tasks of developing methods and means for carrying out metrological tests of non-contact sensors for medical purposes are becoming urgent. Purpose – to show the possibility of implementing automated metrological tests of location sensors for medical use based on a personal computer and publicly available standard hardware and software. A method has been developed and implemented for conducting metrological tests of location sensors based on a personal computer, a digital dynamic measure of linear displacement, virtual measuring instruments, laser and ultrasonic sensors, as well as determining conversion errors in the LabVIEW environment. As an exemplary measuring instrument, it is proposed to use a webcam with a virtual device for recording the law of displacement in the LabVIEW Vison Development application. Full-scale experiments have been carried out, in which, using a digital measure of linear displacement, it is possible to reproduce with high accuracy almost any law of displacement and to regulate its informative parameters. Real movement signals were received with the help of virtual devices, recorded by two location sensors and a web camera. The errors of the means of registration are determined in comparison with the given digital method and analytically the law of movement. Introduction of the developed method and hardware and software for metrological certification of sensors of diagnostic channels of the systems of complex magnetotherapy «Multimag» and «Relaxmag». Carrying out automated metrological tests of sensors will ensure prompt, reliable and objective control of their actual characteristics, which means it will increase the effectiveness of treatment due to the prompt and continuous monitoring of the patient's functional state and an objective assessment of a number of important indicators.

scholarly journals Dynamic Rule-Based Algorithm to Tune Insulin-on-Board Constraints for a Hybrid Artificial Pancreas System

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Arthur Bertachi ◽  
Lyvia Biagi ◽  
Aleix Beneyto ◽  
Josep Vehí
Keyword(s):  
Type 1 Diabetes ◽  
Insulin Infusion ◽  
Artificial Pancreas ◽  
The Body ◽  
Control Algorithms ◽  
Rule Based ◽  
Control Blood Glucose ◽  
Glucose Levels ◽  
Blood Glucose Levels

The artificial pancreas (AP) is a system intended to control blood glucose levels through automated insulin infusion, reducing the burden of subjects with type 1 diabetes to manage their condition. To increase patients’ safety, some systems limit the allowed amount of insulin active in the body, known as insulin-on-board (IOB). The safety auxiliary feedback element (SAFE) layer has been designed previously to avoid overreaction of the controller and thus avoiding hypoglycemia. In this work, a new method, so-called “dynamic rule-based algorithm,” is presented in order to adjust the limits of IOB in real time. The algorithm is an extension of a previously designed method which aimed to adjust the limits of IOB for a meal with 60 grams of carbohydrates (CHO). The proposed method is intended to be applied on hybrid AP systems during 24 h operation. It has been designed by combining two different strategies to set IOB limits for different situations: (1) fasting periods and (2) postprandial periods, regardless of the size of the meal. The UVa/Padova simulator is considered to assess the performance of the method, considering challenging scenarios. In silico results showed that the method is able to reduce the time spent in hypoglycemic range, improving patients’ safety, which reveals the feasibility of the approach to be included in different control algorithms.

scholarly journals Deleterious effects of prolonged bed rest on the body systems of the elderly - a review

2018 ◽  
Vol 21 (4) ◽  
pp. 499-506 ◽  
Author(s):  
Luana Petruccio Cabral Monteiro Guedes ◽  
Maria Liz Cunha de Oliveira ◽  
Gustavo de Azevedo Carvalho
Keyword(s):  
Research Question ◽  
Primary Source ◽  
Bed Rest ◽  
The Elderly ◽  
The Body ◽  
Narrative Review ◽  
Boolean Operator

Abstract Objective: to describe the deleterious effects of prolonged bed rest on the body systems of the elderly. Method: an integrative-narrative review was carried out, with the following research question: What are the effects of prolonged bed rest on the body systems of the elderly? The PubMed and Virtual Health Library databases were searched with the following terms: "bed rest” and "elderly" with the Boolean operator “and”. Results: a total of 1,639 articles were found. After application of the established criteria, nine articles remained, and 20 were added to maintain the citation of the primary source, giving a total of 29 articles. Conclusion: the immobility associated with prolonged bed rest is detrimental to the health of the elderly, as it affects several systems, such as the cardiovascular, pulmonary, gastrointestinal, musculoskeletal and urinary systems, which may lead to the onset of diseases in addition to those that led to bed rest.

scholarly journals Biophysics and systems biology

2010 ◽  
Vol 368 (1914) ◽  
pp. 1125-1139 ◽  
Author(s):  
Denis Noble
Keyword(s):  
Systems Biology ◽  
Computational Biology ◽  
Evolutionary Theory ◽  
Nerve Impulse ◽  
Theoretical Framework ◽  
The Body ◽  
Molecular Biophysics ◽  
First Century ◽  
Computational Power ◽  
Twenty First Century

Biophysics at the systems level, as distinct from molecular biophysics, acquired its most famous paradigm in the work of Hodgkin and Huxley, who integrated their equations for the nerve impulse in 1952. Their approach has since been extended to other organs of the body, notably including the heart. The modern field of computational biology has expanded rapidly during the first decade of the twenty-first century and, through its contribution to what is now called systems biology, it is set to revise many of the fundamental principles of biology, including the relations between genotypes and phenotypes. Evolutionary theory, in particular, will require re-assessment. To succeed in this, computational and systems biology will need to develop the theoretical framework required to deal with multilevel interactions. While computational power is necessary, and is forthcoming, it is not sufficient. We will also require mathematical insight, perhaps of a nature we have not yet identified. This article is therefore also a challenge to mathematicians to develop such insights.

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