Technology and test

The chairman of the Technology Applications in Space Working Group summarizes the technology issues for each of the disciplines in Tethered Satellite Systems. The disciplines are Tether Materials and Configurations, Tether System Dynamic Simulation Capability, Tether System Instrumentation, TAS Program Related Science Instrumentation, Atmospheric/Aerothermodynamic tethered system research, and TAS Discipline Program Accomplishment. To enable these tether applications, design and development programs have been recommended and are presently underway relative to the demonstration of the hollow cathode concept which is an enabling electrodynamic tether mission technology

The Intriguing Nexus between Corruption and Capital Account Restrictions

The paper develops a theoretical model showing a mutual relationship between corruption and capital account restrictions. According to the model, higher corruption induces stricter restrictions and vice versa. We test the model using panel data for 112 countries over the period 1984–2002 and find that corruption and restrictions are indeed mutually determined. Estimating the model simultaneously, capital account restrictions induce higher corruption. Higher corruption, in turn, is associated with more restrictions on the capital account.The empirical relationship is,however, not completely robust.Corruption, capital account restrictions, dynamic panel

Good Policy Choices Even When Voters Entertain Biased Beliefs: A Model with Endogenous Valence

In “The Myth of the Rational Voter” Brian Caplan shows that voters entertain systematically biased beliefs on a number of essential issues of economic policy and concludes that this leads democracies to choose bad policies. We introduce the psychological concept of mental models to address voters’ naive reasoning about the economy and thereby explain the persistent bias in beliefs. Next, we develop a game-theoretical model to show that this does not automatically lead to bad policy choices. The model formalizes Caplan’s thought experiment No. 4 by introducing endogenous party valence to a model of probabilistic voting. In so doing, we provide an investigation of when good policies are chosen in democracy. Based on our findings, we discuss the impact of different political institutions on economic outcomes.Voting behaviour, dynamic party competition, valence, VP-functions, biased voting

Smoking and Social Interaction

We study the social interaction of non-smokers and smokers as a sequential game, incorporating insights from social psychology and experimental economics into an economic model. Social norms affect human behavior such that non-smokers do not ask smokers to stop smoking and stay with them, even though disutility from smoking exceeds utility from social interaction. Overall, smoking is unduly often accepted when accommodating smoking is the social norm. The introduction of smoking and non-smoking areas does not overcome this specific inefficiency.We conclude that smoking bans may represent a required (second-best) policy.Smoking policy, social norms, guilt aversion, deviant behavior, social interaction

Change-over within little scope: On the decision neutrality of recent tax reform proposals

Political economy aspects make progressive income taxation and taxation of capital income imperative in practise. International tax competition and profit shifting, in turn, put pressure on corporate and capital taxes. Hence, the scope for a politically feasible change-over to a status of improved taxation is little. We provide an extended dynamic general equilibrium model and analyze politically feasible recent reform proposals referring neutrality. We then propose an alternative tax reform that, in contrast to these proposals, guarantees even growth neutrality, without necessarily jeopardizing political feasibility.Dynamic general equilibrium models; taxation; tax reform; decision neutrality; ACE; dual income tax

Smoking and Social Interaction

We study the social interaction of non-smokers and smokers as a sequential game, incorporating insights from social psychology and experimental economics into an economic model. Social norms affect human behavior such that non-smokers do not ask smokers to stop smoking and stay with them, even though disutility from smoking exceeds utility from social interaction. Overall, smoking is unduly often accepted when accommodating smoking is the social norm. The introduction of smoking and non-smoking areas does not overcome this specific inefficiency. We conclude that smoking bans may represent a required (second-best) policy.smoking policy, social norms, guilt aversion, deviant behavior, social interaction

Civilization and the evolution of short sighted agents

We model an assurance game played within a population with two types of individuals -- short-sighted and foresighted. Foresighted people have a lower discount rate than short sighted people. These phenotypes interact with each other. We define the persistent interaction of foresighted people with other foresighted people as a critical element of civilization while the interaction of short sighted people with other short sighted people as critical to the failure of civilization. We show that whether the short sighted phenotype will be an evolutionary stable strategy (and thus lead to the collapse of civilization) depends on the initial proportion of short sighted people relative to people with foresight as well as their relative discount rates. Further we explore some comparative static results that connect the probability of the game continuing and the relative size of the two discount rates to the likelihood that civilization will collapse.society; breakdown; evolution; replicator; dynamic; process; civilization; conflict; institution

Thermal-barrier-coated turbine blade study

The effects of coating TBC on a CF6-50 stage 2 high-pressure turbine blade were analyzed with respect to changes in the mean bulk temperature, cooling air requirements, and high-cycle fatigue. Localized spallation was found to have a possible deleterious effect on low-cycle fatigue life. New blade design concepts were developed to take optimum advantage of TBCs. Process and material development work and rig evaluations were undertaken which identified the most promising combination as ZrO2 containing 8 w/o Y2O3 applied by air plasma spray onto a Ni22Cr-10Al-1Y bond layer. The bond layer was applied by a low-pressure, high-velocity plasma spray process onto the base alloy. During the initial startup cycles the blades experienced localized leading edge spallation caused by foreign objects

Subsonic tests of an all-flush-pressure-orifice air data system

The use of an all-flush-pressure-orifice array as a subsonic air data system was evaluated in flight and wind tunnel tests. Two orifice configurations were investigated. Both used orifices arranged in a cruciform pattern on the airplane nose. One configuration also used orifices on the sides of the fuselage for a source of static pressure. The all-nose-orifice configuration was similar to the shuttle entry air data system (SEADS). The flight data were obtained with a KC-135A airplane. The wind tunnel data were acquired with a 0.035-scale model of the KC-135A airplane. With proper calibration, several orifices on the vertical centerline of the vehicle's nose were found to be satisfactory for the determination of total pressure and angle of attack. Angle of sideslip could be accurately determined from pressure measurements made on the horizontal centerline of the aircraft. Orifice pairs were also found that provided pressure ratio relationships suitable for the determination of Mach number. The accuracy that can be expected for the air data determined with SEADS during subsonic orbiter flight is indicated

Raphaelle Siemers, Violin

Partita No. 2 in D minor Chaconne / J.S. Bach; Duet for Violin and Viola / Franz Anton Hoffmeister; Violin concerto in D Major, Op. 35 / Pytor Tchaikovsk