Other Challenges in the Development of the Orbiter Environmental Control Hardware

Development of the Space Shuttle orbiter environmental control and life support system (ECLSS) included the identification and resolution of several interesting problems in several systems. Some of these problems occurred late in the program, including the flight phase. Problems and solutions related to the ammonia boiler system (ABS), smoke detector, water/hydrogen separator, and waste collector system (WCS) are addressed

Fluid mass sensor for a zero gravity environment

A sensor for measuring the mass of fluids, is described which includes a housing having an inlet and outlet for receiving and dumping the fluid, a rotary impeller within the housing for imparting centrifugal motion to the fluid and a pressure sensitive transducer attached to the housing to sense the rotating fluid pressure. The fluid may be drawn into the housing by entrainment within a gas stream. The resulting mixture is then separated into two phases: gas and liquid. The gas is removed from the housing and the pressure of the liquid, under centrifugal motion, is sensed and correlated with the mass of the fluid

Zero-gravity open-type urine receptacle

The development of the zero-gravity open-type urine receptacle used in the Apollo command module is described. This type receptacle eliminates the need for a cuff-type urine collector or for the penis to circumferentially contact the receptacle in order to urinate. This device may be used in a gravity environment, varying from zero gravity to earth gravity, such as may be experienced in a space station or space base

Speaking Through Silence: Conceptual Art and Conversational Implicature

I first try to identify what problem, if any conceptual art poses for philosophical aesthetics. It is harder than one might think to formulate some claim about traditional art with which much conceptual art is inconsistent. The idea that sense experience plays a special role in the appreciation of traditional artworks falls foul of literature. Instead I focus on the idea that conceptual art exhibits a particularly loose relation between the properties with which we engage in appreciating it and the properties on which those artistic properties depend. In Part II, I then offer an account of how conceptual art communicates, and attempt to use it to illuminate some prominent features of that art. I suggest it works by frustrating certain fundamental expectations with which we approach it. In this it is analogous to certain ways of indirectly communicating in conversation – certain kinds of conversational implicature. At the close, I ask whether this account allows us to address the problem identified in Part I

Drug Use on Mont Blanc: A Study Using Automated Urine Collection

Mont Blanc, the summit of Western Europe, is a popular but demanding high-altitude ascent. Drug use is thought to be widespread among climbers attempting this summit, not only to prevent altitude illnesses, but also to boost physical and/or psychological capacities. This practice may be unsafe in this remote alpine environment. However, robust data on medication during the ascent of Mont Blanc are lacking. Individual urine samples from male climbers using urinals in mountain refuges on access routes to Mont Blanc (Goûter and Cosmiques mountain huts) were blindly and anonymously collected using a hidden automatic sampler. Urine samples were screened for a wide range of drugs, including diuretics, glucocorticoids, stimulants, hypnotics and phosphodiesterase 5 (PDE-5) inhibitors. Out of 430 samples analyzed from both huts, 35.8% contained at least one drug. Diuretics (22.7%) and hypnotics (12.9%) were the most frequently detected drugs, while glucocorticoids (3.5%) and stimulants (3.1%) were less commonly detected. None of the samples contained PDE-5 inhibitors. Two substances were predominant: the diuretic acetazolamide (20.6%) and the hypnotic zolpidem (8.4%). Thirty three samples were found positive for at least two substances, the most frequent combination being acetazolamide and a hypnotic (2.1%). Based on a novel sampling technique, we demonstrate that about one third of the urine samples collected from a random sample of male climbers contained one or several drugs, suggesting frequent drug use amongst climbers ascending Mont Blanc. Our data suggest that medication primarily aims at mitigating the symptoms of altitude illnesses, rather than enhancing performance. In this hazardous environment, the relatively high prevalence of hypnotics must be highlighted, since these molecules may alter vigilance

Urinal or conduit? Institutional information flow between the UK intelligence services and the news media

This is the author's accepted manuscript. The final published article is available from the link below. Copyright @ Sage Publications 2013.Since the 1990s, the Secret Intelligence Service (MI6) and the Security Service (MI5) have developed formal links with most major UK news organisations in an effort to improve the agencies’ media presentation. This article discusses the impact and inherent problems of these relationships, including whether the news media can have official, formal but non-attributable links with these agencies without compromising their role as the fourth estate. Utilising epistemologies for crime reporting and news sources, this article proposes an initial framework to analyse these institutional relationships. It also takes as a case study the controversy over whether MI5 deliberately played down their prior knowledge of 7/7 suicide bomber Mohammed Sidique Khan. The author was one of the journalists briefed by MI5 on Khan and has here taken the Khan controversy as a case study to investigate the Security Service’s information flow and whether the agency misled, and indeed intended to mislead, the media and the public

The Washroom Game

This article analyses a game where players sequentially choose either to become insiders and pick one of finitely many locations or to remain outsiders. They will only become insiders if a minimum distance to the next player can be assured; their secondary objective is to maximise the minimal distance to other players. This is illustrated by considering the strategic behaviour of men choosing from a set of urinals in a public lavatory. However, besides very similar situations (e.g. settling of residents in a newly developed area, the selection of food patches by foraging animals, choosing seats in waiting rooms or lines in a swimming pool), the game might also relevant to the problem of placing billboards attempting to catch the attention of passers-by or similar economic situations. In the non-cooperative equilibrium, all insiders behave as if they cooperated with each other and minimised the total number of insiders. It is shown that strategic behaviour leads to an equilibrium with substantial underutilization of available locations. Increasing the number of locations tends to decrease utilization. The removal of some locations which leads to gaps can not only increase relative utilization but even absolute maximum capacity.Efficient design of facilities; location games; privacy concerns; strategic entry prevention; unfriendly seating arrangement; urinal problem

Neutral buoyancy testing of a shuttle orbiter crew compartment

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Solid metabolic waste transport and stowage investigation

The basic Waste Collection System (WCS) design under consideration utilized air flow to separate the stool from the WCS user and to transport the fecal material to a slinger device for subsequent deposition on a storage bowel. The major parameters governing stool separation and transport were found to be the area of the air inlet orifices, the configuration of the air inlet orifice and the transport air flow. Separation force and transport velocity of the stool were studied. The developed inlet orifice configuration was found to be an effective design for providing fecal separation and transport. Simulated urine tests and female user tests in zero gravity established air flow rates between 0.08 and 0.25 cu sm/min (3 and 9 scfm) as satisfactory for entrapment, containment and transport of urine using an urinal. The investigation of air drying of fecal material as a substitute for vacuum drying in a WCS breadboard system showed that using baseline conditions anticipated for the shuttle cabin ambient atmosphere, flow rates of 0.14 cu sm/min (5 cfm) were adequate for drying and maintaining biological stability of the fecal material

Financial Uncertainty in Germany and its Impact on Western European Terrorism

This paper analyses the link between the VDAX as a proxy for European financial uncertainty and the number of terror incidents in Western Europe. Considering data of the Global Terrorism Database, the number of terror incidents does – on average – not affect financial uncertainty. In contrast, based on a behavioral model of terrorism motivated by Schmid and de Graaf (1982), lagged financial uncertainty contains information for the risk of terror events. Estimation results of the negative binominal quasi maximum likelihood count data model confirm an inverse impact of lagged financial uncertainty on terrorism. Furthermore, empirical evidence leads to the conclusion of average lead time for terror incidents of 6 month. These results are potentially important for terror prevention.Efficient design of facilities; location games; privacy concerns; strategic entry prevention; unfriendly seating arrangement; urinal problem