scholarly journals Investigation of a CubeSat in Orbit Anomaly through Verification on Ground

Aerospace ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 38 ◽  
Author(s):  
Fabrizio Stesina ◽  
Sabrina Corpino

Given the role of Cubesats in the new space economy, a statistically relevant number of CubeSats have flown, and considering the high percentage of failed missions, the investigation of in-orbit anomalies becomes of paramount importance. It is rare to find data about mission failures, probably because the partial or total absence of telemetry does not encourage any analysis. The lack of data from the spacecraft in orbit can be mitigated through ad-hoc verification campaigns on satellite models when in-orbit anomalies are experienced. This paper shows an effective testing activity conducted on models of the spacecraft to understand the root cause of a severe anomaly that occurred during mission operations. The tests are part of a comprehensive methodology for root causes analysis. The paper aims at sharing the experience built upon a practical case of interest. More importantly, this work has the ambition of fostering the research on key topics of reliability, mission operations and assembly, and integration and verification/test processes, which have shown to be critical. The activity presented in this paper demonstrates that investigating the anomalies can help recover the mission of interest but can also support building a heritage that is still missing for CubeSat missions today.

New Space ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 201-207
Author(s):  
Marc Abi-Fadel ◽  
Walter A.R. Peeters
Keyword(s):  

2018 ◽  
Author(s):  
Liangshan Chen ◽  
Yuting Wei ◽  
Tanya Schaeffer ◽  
Chongkhiam Oh

Abstract The paper reports the investigation on the root cause of source-drain leakage in bulk FinFET devices. While the failing device was readily isolated by nanoprobing technique and the electrical analysis pinpointed the potential defect location inside the Fin channel, the identification of physical root cause went through extreme challenges imposed by the tiny-sized device and the unique FinFET 3D architecture. The initial TEM analysis was misled by the projection of a species in the lamella surface and thus could not explain the electrical data. Careful analysis on the device structure was able to identify the origin of the species and led to the discovery of the actual root cause. This paper will provide the analysis details leading to the findings, and highlight the role of electrical understanding in not only providing guidance for physical analysis but also revealing the true root cause of failure in FinFET devices.


Author(s):  
Laura Quick

This chapter argue that ritual behaviours might be just as good a source as literary texts for the diffusion of traditional cursing and treaty material across different cultures in the ancient Near East. In particular, the role of ad hoc oral Targum in the ritual process could have been an important means by which traditions were shared between different language communities. Recognition of the ritual context of this material also provides insights for the comparative method, the dating and authorship of Deuteronomy 28, and the subversive impetus thought to have stood behind its composition. Ultimately, the function of the written word in a largely oral world is shown to be fundamental to understanding the composition, function and the early history of the curses in the book of Deuteronomy.


Author(s):  
Martin Mennecke

Universal jurisdiction permits states to investigate and prosecute perpetrators of certain widely condemned offences, irrespective of whether they possess any of the traditional territorial, nationality, or other jurisdictional links to the offence. As a legal principle, African states accept the principle of universal jurisdiction, but in the past decade they have pushed back against it due to the perception that the courts of various European states have unfairly targeted African government officials that they perceive as enemies. Against this background, the chapter examines the status of the universal jurisdiction debate and how it relates to the role of the International Criminal Court and that of the African Union and its member states, in addition to evaluating the proposals made by African states within the framework of the United Nations to address the African government concerns about double standards in the application of universal jurisdiction through a special ad hoc committee of the General Assembly.


2020 ◽  
Vol 36 ◽  
pp. 15-25
Author(s):  
Ben Kiregyera

Adoption of development agendas at different levels – national, regional, continental, and global level – has led to an unprecedented increase in demand for official statistics. This increase has not only brought to the fore a litany of challenges facing National Statistical Systems (NSSs) in Africa but also it has created opportunities for strengthening statistical production and development. This paper underscores the need for countries to take full advantage of these opportunities and increase investments in statistics, undertake data innovation, and expand and diversify data ecosystems, leveraging on the foundations of the data revolution for sustainable development and in line with current international statistical frameworks. The paper posits that these improvements will not happen coincidentally nor through ad hoc, piecemeal and uncoordinated approaches. Rather they will happen through more systematic, coordinated and multi-sectoral approaches to statistical development. The National Strategy for the Development of Statistics (NSDS) is presented as a comprehensive and robust framework for building statistical capacity and turning around NSSs in African countries. The paper unpacks the NSDS; elaborates the NSDS processes including; mainstreaming sectors into the NSDS, the stages of the NSDS lifecycle and the role of leadership in the NSDS proces; highlights NSDS extension; presents the design and implementation challenges, and the key lessons learned from the NSDS processes in Africa in the last 15 years or so.


Biomedicines ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 125
Author(s):  
Jorge Simón ◽  
Teresa Cardoso Delgado ◽  
Luis Alfonso Martinez-Cruz ◽  
Maria Luz Martínez-Chantar

Non-alcoholic steatohepatitis (NASH) is characterized by an abnormal hepatic lipid accumulation accompanied by a necro-inflammatory process and a fibrotic response. It comprises from 10% to 30% of cases of patients with non-alcoholic liver disease, which is a global health problem affecting around a quarter of the worldwide population. Nevertheless, the development of NASH is often surrounded by a pathological context with other comorbidities, such as cardiovascular diseases, obesity, insulin resistance or type 2 diabetes mellitus. Dietary imbalances are increasingly recognized as the root cause of these NASH-related comorbidities. In this context, a growing concern exists about whether magnesium consumption in the general population is sufficient. Hypomagnesemia is a hallmark of the aforementioned NASH comorbidities, and deficiencies in magnesium are also widely related to the triggering of complications that aggravate NASH or derived pathologies. Moreover, the supplementation of this cation has proved to reduce mortality from hepatic complications. In the present review, the role of magnesium in NASH and related comorbidities has been characterized, unraveling the relevance of maintaining the homeostasis of this cation for the correct functioning of the organism.


Author(s):  
Jessica Bowie ◽  
Oliver Brunckhorst ◽  
Robert Stewart ◽  
Prokar Dasgupta ◽  
Kamran Ahmed

Abstract Purpose Body image, self-esteem, and masculinity are three interconnected constructs in men with prostate cancer, with profound effects on quality of life. This meta-synthesis aimed to evaluate all known qualitative studies published studying the effect of prostate cancer on these constructs. Methods A systematic review utilising PubMed, Embase, MEDLINE, and PsycINFO databases up to May 2020 was conducted in line with PRISMA and ENTREQ guidelines. All qualitative studies of men’s experiences with body image, self-esteem, and masculinity whilst living with prostate cancer were included. A thematic meta-synthesis was conducted to identify emergent descriptive and analytical themes under the main study constructs. Results Of 2188 articles identified, 68 were included. Eight descriptive themes were identified under two analytical themes: ‘Becoming a Prostate Cancer Patient’ and ‘Becoming a Prostate Cancer Survivor’. These described the distress caused by changes to body image, sexual functioning, sense of masculinity, and self-esteem, and the subsequent discourses men engaged with to cope with and manage their disease. A key element was increased flexibility in masculinity definitions, and finding other ways to re-affirm masculinity. Conclusions Prostate cancer has an important effect on men’s health post-diagnosis, and we identified strong relationships between each construct evaluated. The role of hegemonic masculinity is important when considering men’s coping mechanisms and is also a key factor when addressing these constructs in counselling post-treatment. Implications for Cancer Survivors This meta-synthesis provides key topics that uniquely affect prostate cancer survivors, enabling these patients to be effectively counselled, and have their concerns recognised by clinicians.


Author(s):  
Leila Meshkat ◽  
Granvil Pennington ◽  
James Ruszkowski ◽  
Jean Haensly ◽  
Charles Hogle

2021 ◽  
pp. 1-4
Author(s):  
Kritika Thakur ◽  
Sangeeta H Toshikahne ◽  
Ravi Sahu ◽  
Rinal Patel

Ayurveda explains that our health is dependent not only on what we eat, but also on how we digest. The most vitamin-fortied diet or healthy food is considered unhealthy if our body isn't able to properly digest, absorb, and assimilate the food. Acc. to ayurvedic classics “Sarve Roga Api Mandagni” means all diseases in the body are caused due to mandagni (due to improper functioning of agni). In other words, the proper function of agni is important for strong vyadhikshamatva shakti (immunity) or bala Agni plays an important role in digestion of food. Mandagni leads to Ama formation which is the root cause of Roga. Utpatti. There are so many diseases originating because of Ama which are grouped under Ampradoshaja Vikara. Deepana and Pachana are considered under the heading of Shamanaushadhis. It is the rst line of treatment selected in order to overcome Ampradoshaja Vikaras. Thus, the treatment is mainly targeted towards the Agni thereby correcting the Ama. Deepana and Pachana are aimed in correcting the Agni which further helps in the proper digestion of Sneha and proper mobilization of dosha from shakha to kostha


2022 ◽  
pp. 016224392110722
Author(s):  
Miao Lu ◽  
Jack Linchuan Qiu

Technology flows are becoming increasingly diverse in the twenty-first century, calling for an update of concepts and frameworks. Reflecting on the inherent tensions of technology transfer, including its technocratic dreams, insensitivity to technological materiality, and narrow focus on certain human actors, we propose technology translation as a complementary conceptual framework to understand traveling technologies. Taking a socio-technical approach, technology translation views artifacts as socially shaped with distributed agency, which makes technology flows unstable and unpredictable. In so doing, we develop a typology to explain five technology flow scenarios, shedding new light on the mechanisms of technology traveling by foregrounding the role of translators. Last, we discuss the politics of translation and elaborate how technology translation opens new space to engage with the complexity and uncertainty of technology flows, especially in the Global South.


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