scholarly journals Atmospheric Density and Temperature Vertical Profile Retrieval for Flight-Tests with a Rayleigh Lidar On-Board the French Advanced Test Range Ship Monge

Atmosphere ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 75 ◽  
Author(s):  
Robin Wing ◽  
Milena Martic ◽  
Alain Hauchecorne ◽  
Jacques Porteneuve ◽  
Philippe Keckhut ◽  
...  

The Advanced Test Range Ship Monge (ATRSM) is dedicated to in-flight measurements during the re-entry phase of ballistic missiles test flights. Atmospheric density measurements from 15 to 110 km are provided using one of the world’s largest Rayleigh lidars. This lidar is the culmination of three decades of French research experience in lidar technologies, developed within the framework of the global Network for Detection of Atmospheric and Climate Changes (NDACC), and opens opportunities for high resolution Rayleigh lidar studies above 90 km. The military objective of the ATRSM project is to provide near real time estimates of the atmospheric relative density profile, with an error budget of less than 10% at 90 km altitude, given a temporal integration of 15 min and a vertical resolution of 500 m. To achieve this aim we have developed a unique lidar system which exploits six laser transmitters and a constellation of eight receiving telescopes which maximises the lidar power-aperture product. This system includes a mix of standard commercially available optical components and electronics as well as some innovative technical solutions. We have provided a detailed assessment of some of the more unique aspects of the ATRSM lidar.

Daedalus ◽  
2017 ◽  
Vol 146 (1) ◽  
pp. 113-124 ◽  
Author(s):  
Seth Lazar

Modern analytical just war theory starts with Michael Walzer's defense of key tenets of the laws of war in his Just and Unjust Wars. Walzer advocates noncombatant immunity, proportionality, and combatant equality: combatants in war must target only combatants; unintentional harms that they inflict on noncombatants must be proportionate to the military objective secured; and combatants who abide by these principles fight permissibly, regardless of their aims. In recent years, the revisionist school of just war theory, led by Jeff McMahan, has radically undermined Walzer's defense of these principles. This essay situates Walzer's and the revisionists’ arguments, before illustrating the disturbing vision of the morality of war that results from revisionist premises. It concludes by showing how broadly Walzerian conclusions can be defended using more reliable foundations.


2017 ◽  
Vol 38 (2) ◽  
pp. 831-853
Author(s):  
Elisabeth Hoffberger

If thinking about weapons, one generally thinks about lethal technology. However, an abundance of so-called non-lethal weapons, a technology not aimed at killing but merely incapacitating the human target or military objective, is also being deployed both within and outside the ambit of armed conflict. Since non-lethal weapons do not necessarily implicate a zero chance of mortality, but often lead to severe wounds and tremendous suffering, the use and deployment of such weapons raise strong humanitarian and human rights concerns. The prohibition to cause superfluous injuries and unnecessary suffering, as well as the prohibition of indiscriminate attacks are, amongst others, one of the most relevant provisions potentially having an influence on the deployment of nonlethal technology in armed conflict. However, the invocation of the principle of proportionality may lead to the justification of the use of non-lethal weapons on the grounds that the military advantage anticipated was greater than the human suffering caused. Insofar, one must ask whether there is a “red-line”; where the almost inflationary invocation of the principle of proportionality may defeat the object and purpose of the Geneva Conventions and therefore render the deployment and use of non-lethal technology illegal. Apart from the battlefield, non-lethal weapons are also being deployed in lawenforcement scenarios, where human rights law plays a pivotal role. In this regard, one must not look merely at the prohibition of torture and inhuman or degrading suffering and the right to life but also at the right to health, a presumably underestimated principle curbing and shaping the use of non-lethal technology outside the ambit of armed conflict.


2015 ◽  
Vol 48 (1) ◽  
pp. 39-54 ◽  
Author(s):  
Heather A Harrison Dinniss

Cyber warfare and the advent of computer network operations have forced us to look again at the concept of the military objective. The definition set out in Article 52(2) of Additional Protocol I – that an object must by its nature, location, purpose or use, make an effective contribution to military action – is accepted as customary international law; its application in the cyber context, however, raises a number of issues which are examined in this article. First, the question of whether data may constitute a military objective is discussed. In particular, the issue of whether the requirement that the definition applies to ‘objects’ requires that the purported target must have tangible or material form. The article argues on the basis of both textual and contextual analysis that this is not required, but it contends that it may prove to be useful to differentiate between operational- and content-level data. The article then examines the qualifying contribution of military objectives such as their nature, location, purpose or use, and questions whether network location rather than geographical location may be used as a qualifying criterion in the cyber context. The final part of the article addresses the question of whether the particular ability of cyber operations to effect results at increasingly precise levels of specificity places an obligation on a party to an armed conflict to define military objectives at their smallest possible formulation – that is, a small piece of code or component rather than the computer or system itself. Such a requirement would have significant implications for the cyber context where much of the infrastructure is dual use, but the distinction between civilian objects and military objectives is a binary classification.


2022 ◽  
Vol 3 ◽  
Author(s):  
Angelos Alamanos ◽  
Phoebe Koundouri ◽  
Lydia Papadaki ◽  
Tatiana Pliakou

The Water-Food-Energy Nexus can support a general model of sustainable development, balancing resources with increasing economic/productive expectations, as e.g., in agriculture. We synthesise lessons from Greece's practical and research experience, identify knowledge and application gaps, and propose a novel conceptual framework to tackle these challenges. Thessaly (Central Greece), the country's driest region and largest agricultural supplier is used as an example. The area faces a number of water quantity and quality issues, ambitious production-economic objectives, continuous (historically) drought and flood events, conflicts, administrative and economic issues, under serious climate change impacts. A detailed assessment of the current situation is carried out, covering all these aspects, for the first time in an integrated way. Collaboration gaps among different stakeholders are identified as the biggest impediment to socially acceptable actions. For the first time, to our knowledge, the Nexus is set as a keystone to develop a novel framework to reverse the situation and achieve sustainable management under socially acceptable long-term visions. The proposed framework is based on Systems' Theory, innovation, uses a multi-disciplinary platform to bring together all relevant stakeholders, provides scientific support and commitment, and makes use of technological advances for the system's improvement.


Author(s):  
Dr. Mohammad Younus ◽  
Dr. Aisha Shahzad

The US responded to the 9/11 terrorist attacks by invading Afghanistan. The US invasion had two perceived objectives: Military and Political. The military objective was to eliminate Al-Qaida and Taliban in order to restore peace, while the political dimension was to rebuild the Afghan state and society from scratch, to establish a healthy democratic system which would put Afghanistan on the road to prosperity. In Dec 2001, nearly all the Afghan stakeholders, except Taliban, gathered along with the representatives of international community in Bonn, Germany. The purpose of the conference was to discuss the plans which would help to materialize the dream of a stable and democratic Afghanistan. The project of democratic Afghanistan envisioned at Bonn Conference in 2001 is still far from being achieved. All the attempts made by international community to establish democracy in Afghanistan have not been met with success. The study begins with the premise that there are certain pre-conditions which enhance the growth of democracy and unless the conditions are met, democratic stability will remain a distant dream in Afghanistan. This study surveys and analyzes the deterioration of democratic system in Afghanistan with special reference to the role of ethnic cleavages and the menacing influence of foreign actors. The study recommends policies that are aimed at reducing ethnic polarization by ensuring more equitable distribution of power and resources coupled with a realistic approach on the part of Kabul to take into account the legitimate security interests of regional countries in order to compel them to play a constructive role for achieving peace and stability in Afghanistan.


2012 ◽  
Vol 147 (5) ◽  
pp. 925-931 ◽  
Author(s):  
Karthik Balakrishnan ◽  
Todd C. Edwards ◽  
Jonathan A. Perkins

Objective Lymphatic malformations cause significant symptoms and functional deficits. Patients seek care for functional and symptomatic effects of their disease, but current disease burden and treatment outcome measures focus primarily on anatomy and histopathology. The authors describe disease impacts reported by patients and parents as a step toward more comprehensive disease burden assessments. Study Design Cross-sectional. Setting Children’s hospital vascular anomaly clinic. Subjects and Methods Participants were recruited through a pediatric vascular anomaly clinic. A panel of senior pediatric otolaryngologists and an outcomes scientist developed interview questions based on clinical and research experience and available literature. The outcomes scientist conducted parent and adolescent interviews. The panel reviewed responses to define relevant items within functional domains. Participants rated impact on daily life for each domain. Results Thirty-one participants represented all 5 de Serres stages (mean [SD] age, 9 [6] years; n = 11 adolescents and 20 parents). Adolescents reported frequent sickness as the domain with greatest impact. Sleep was more affected in adolescents with higher stage lesions. Parents of younger children reported greatest impact on breastfeeding. For adolescents, lesion stage predicted perceived social stigma (controlling for age), whereas increasing age was associated with greater impact from swelling (controlling for stage). For parents, stage predicted breastfeeding impact (controlling for stage). Conclusion This is the first detailed assessment of patient- and parent-reported functional and symptomatic impacts of head and neck lymphatic malformations. Both adolescent patients and parents of younger children reported significant symptom and functional effects of this disease.


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