scholarly journals Irradiation Flux Modelling for Thermal–Electrical Simulation of CubeSats: Orbit, Attitude and Radiation Integration

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6691
Author(s):  
Edemar Morsch Filho ◽  
Laio Oriel Seman ◽  
Cezar Antônio Rigo ◽  
Vicente de Paulo Nicolau ◽  
Raúl García Ovejero ◽  
...  

During satellite development, engineers need to simulate and understand the satellite’s behavior in orbit and minimize failures or inadequate satellite operation. In this sense, one crucial assessment is the irradiance field, which impacts, for example, the power generation through the photovoltaic cells, as well as rules the satellite’s thermal conditions. This good practice is also valid for CubeSat projects. This paper presents a numerical tool to explore typical irradiation scenarios for CubeSat missions by combining state-of-the-art models. Such a tool can provide the input estimation for software and hardware in the loop analysis for a given initial condition and predict it along with the satellite’s lifespan. Three main models will be considered to estimate the irradiation flux over a CubeSat, namely an orbit, an attitude, and a radiation source model, including solar, albedo, and infrared emitted by the Earth. A case study illustrating the tool’s abilities is presented for a typical CubeSats’ two-line element set (TLE) and five attitudes. Finally, a possible application of the tool as an input to a CubeSat task-scheduling is introduced. The results show that the complete model’s use has considerable differences from the simplified models sometimes used in the literature.

1994 ◽  
Vol 6 (1) ◽  
pp. 52-58 ◽  
Author(s):  
Charles Anderson ◽  
Robert J. Morris

A case study ofa third year course in the Department of Economic and Social History in the University of Edinburgh isusedto considerandhighlightaspects of good practice in the teaching of computer-assisted historical data analysis.


Author(s):  
Jenny Wallensten
Keyword(s):  

Karpophoros, fruit-bearing, is an epithet easily considered as “literary”, i.e., a poetic name with little or no relation to cult. The epigraphic sources, however, clearly show us that gods thus named were offered divine worship. The epithet is found in connection with several deities. Goddesses of agriculture, such as Demeter, and Ge, the Earth, naturally carry this name, but so do Zeus, Dionysos and a goddess known as “The Aiolian”, who was sometimes associated with Agrippina. This paper surveys deities known as karpophoroi and examines what their cult entailed. Its focus is, however, on a brief Acropolis inscription, IG II2 4758, where Ge is honoured as Karpophoros, in accordance with an oracle. The case study provides insights into the Attic cult of Ge, the epithet Karpophoros, as well as the use and function of epithets within Greek dedicatory language.


2021 ◽  
pp. 074171362110053
Author(s):  
Tracey Ollis

This case study research examines informal adult learning in the Lock the Gate Alliance, a campaign against mining for coal seam gas in Central Gippsland, Australia. In the field of the campaign, circumstantial activists learn to think critically about the environment, they learn informally and incidentally, through socialization with experienced activists from and through nonformal workshops provided by the Environmental Nongovernment Organization Friends of the Earth. This article uses Bourdieu’s “theory of practice,” to explore the mobilization of activists within the Lock the Gate Alliance field and the practices which generate knowledge and facilitate adult learning. These practices have enabled a diverse movement to educate the public and citizenry about the serious threat fracking poses to the environment, to their land and water supply. The movements successful practices have won a landmark moratorium on fracking for coal seam gas in the State of Victoria.


Geoheritage ◽  
2021 ◽  
Vol 13 (2) ◽  
Author(s):  
M. Pásková ◽  
J. Zelenka ◽  
T. Ogasawara ◽  
B. Zavala ◽  
I. Astete

AbstractHolistic interpretation of Earth heritage is one of the most important tasks of UNESCO Global geoparks. The ABC (abiotic, biotic, and cultural interconnections) concept is a potential interpretive approach used in Earth heritage popularization through geotourism. Apart of the deeper understanding of this concept, this study explores the application of this concept in selected geoparks. The Colca and Volcanoes Andagua UNESCO Global Geopark (Peru) and Muroto UNESCO Global Geopark (Japan) served as a case study in the frame of this qualitative research conducted during the summer 2019. Results show that the ABC approach is nearly perfectly understood by both geoparks, however there are both internal and external factors which influence the extent and form of how this concept is applied in practice. Except for specific geographical settings, different stages of geopark product development, and different managerial approaches, they mainly include the level of scientific knowledge and general education in the given geopark, as well as level of knowledge management and networking with another UNESCO global geoparks. The more experienced Muroto Geopark interpretation exhibits a comparatively higher level of visible ABC application, while the Colca and Volcanoes Andagua Geopark can benefit in the future from the natural inclination and ability of the local people to integrate the cultural aspects into their Earth heritage interpretation.


Popular Music ◽  
2019 ◽  
Vol 38 (03) ◽  
pp. 481-497
Author(s):  
Olivia R. Lucas

AbstractThis article presents a case study of ecocritical black metal, delving into the apocalypticism of the California-based black metal band Botanist, who conjures a world in which plants have violently destroyed human civilisation. It first contextualises Botanist amidst the broader current of environmentalism in extreme metal as well as within wider cultural explorations of plants as subjective beings capable of violence. The article then examines how Botanist taps into the logic of apocalyptic environmentalism, as the music presents the essential narrative of apocalyptic bioterrorism: humanity, with wanton hubris, has sown the seeds of its own destruction, and earned whatever horrors befall it on the way to elimination. With its bleak outlook and strident sound world, Botanist's music threatens to destabilise listeners’ assumptions about their place in the world and offers an example of what apocalyptic ecological urgency in music could sound like.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zsuzsanna Győri ◽  
Borbála Benedek

Purpose The purpose of this paper is to discuss the stakeholders of debt settlement programmes in general and some lessons learnt from the most significant debt settlement programmes of recent years in Hungary. The study also presents a planned debt settlement programme in Hungary. The paper explores and details behaviours and motivations of different stakeholders in debt settlement in general and also with reference to a specific case study. As for its main research question, the paper seeks to identify the preconditions of a successful debt settlement programme with specially emphasis on the poor. Design/methodology/approach Data from semi-structured in-depth expert interviews, documents and former research papers were collected for identifying previous Hungarian debt settlement programmes and potential lessons learnt. After a general discussion, based on primary and secondary sources, a case study is presented to obtain a more comprehensive understanding of opportunities and challenges of debt settlement. Findings Six preconditions of successful debt settlement targeting the poor are identified. In the case study, the existence and relevance of these preconditions are tested: the main finding is that they all are important for solving the situations, so a partial solution is not sufficient. In the scope of the case study, more precisely within the planned innovative banking solution, the motivations of the bank and the coordinator NGO are identified. On the part of the bank, motivations for solving social problems (both as far as business and moral issues are concerned) are relevant, while – as for the other party – the situation of the debtor is important to understand so that opportunities of cooperation can be identified. In addition, as other stakeholders also influence the potentials of the programme, their cooperative attitude is also needed. Research limitations/implications Limitations consist in generalisation: the study presents some cases from one single country and finally it focuses only on one specific case in one specific social and economic context in Hungary. Having recognized this risk, the author opted for basing research questions on theory, documented the process in detail, and also used triangulation through applying a multiple data collection (interview, content analysis, literature review) method. Practical implications Besides presenting an academic understanding of the phenomena, the goal of the study is to contextualize and interpret the case, to help the realization of currently frozen initiatives and to promote similar future ones. Social implications Indebtedness is a stressful situation affecting families, smaller communities and broader society as well. The planned cooperation of BAGázs and MagNet tries to help people excluded from the banking system. So that a deeper debt trap can be avoided, the goal of this programme is to purchase, partially discharge and reschedule pre-accumulated debts of carefully selected people who have regular income and are willing to undertake bearable repayment. The idea is very innovative with literally no good practice to follow. The research seeks to clarify the pitfalls and opportunities to help the realization of the project and similar future ones. Originality/value A certain form of values-based banking concerns the financial inclusion of the poor, e.g. debt settlement. Nevertheless, over-indebtedness and the settlement of existing debts as well as the relevance of such issues to the financial inclusion are not emphasized enough in the literature or in practice. Besides presenting an academic understanding of the phenomena, the goal of the study is to contextualize and interpret the case, to help the realization of currently frozen initiatives and to promote similar future ones.


2017 ◽  
Vol 7 (2) ◽  
pp. 125 ◽  
Author(s):  
Thomas Staubitz ◽  
Ralf Teusner ◽  
Christoph Meinel ◽  
Nishanth Prakash

Programming tasks are an important part of teaching computer programming as they foster students to develop essential programming skills and techniques through practice.  The design of educational problems plays a crucial role in the extent to which the experiential knowledge is imparted to the learner both in terms of quality and quantity. Badly designed tasks have been known to put-off students from practicing programming. Hence, there is a need for carefully designed problems. Cellular Automata programming lends itself as a very suitable candidate among problems designed for programming practice. In this paper, we describe how various types of problems can be designed using concepts from Cellular Automata and discuss the features which make them good practice problems with regard to instructional pedagogy. We also present a case study on a Cellular Automata programming exercise used in a MOOC on Test Driven Development using JUnit, and discuss the automated evaluation of code submissions and the feedback about the reception of this exercise by participants in this course. Finally, we suggest two ideas to facilitate an easier approach of creating such programming exercises.


2015 ◽  
Vol 27 (3) ◽  
pp. 444-466 ◽  
Author(s):  
Ben Shepherd ◽  
Shintaro Hamanaka

Purpose – The purpose of this paper is to identify major challenges that Asia-Pacific policy makers face in drawing up international logistics policies, and to seek possible solutions to the problems. Design/methodology/approach – Case study method: the paper includes seven case studies that attempt to address various types of logistics challenges. The paper introduces both intra- and extra-regional examples of the ways in which those challenges have been overcome in particular contexts through concerted action by government and the private sector. Findings – There are a lot of interesting experiences of overcoming logistics challenges, both inside and outside the Asia-Pacific region. Good practice experiences can be replicated by other countries in the region. Originality/value – While there have been a lot of discussions on logistics policy reforms, this paper is one of the first attempts that clearly link challenges with concrete case experiences where those are overcome. The paper discusses very practical issues in an analytically sound manner, using case method.


2017 ◽  
Vol 19 (4) ◽  
pp. 187-198 ◽  
Author(s):  
Kathryn Mackay ◽  
Mary Notman

Purpose The purpose of this paper is to outline the duties and powers of the Adult Support and Protection (Scotland) Act (ASPSA) 2007 and place them in the wider Scottish adult protection legislative framework. It considers the potential value of a standalone adult safeguarding statute. Design/methodology/approach The authors draw upon their research and practice expertise to consider the merits of the ASPSA 2007. They take a case study approach to explore its implementation in one particular Scottish local authority, drawing on the qualitative and quantitative data contained in its annual reports. Findings Skilled, knowledgeable and well-supported practitioners are key to effective screening, investigations and intervention. Protection orders are being used as intended for a very small number of cases. Research limitations/implications The lack of national statistical reports means that there is limited scope for comparison between the local and national data. Practical implications Adult support and protection requires ongoing investment of time and leadership in councils and other local agencies to instigate and maintain good practice. Aspects that require further attention are self-neglect; capacity and consent and residents in care homes who pose potential risks to other residents and staff. Social implications ASPSA 2007 has helped to raise awareness of adults at risk of harm within the local communities and as social issue more generally. Originality/value The authors provide a critical appraisal of the implementation of Scottish adult safeguarding legislation over the last six years. They consider similar developments in England and Wales and argue for comparative research to test these out. Finally, they signpost future directions for bridging separate policy streams.


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