SEIS: Insight's Seismic Experiment for Internal Structure of Mars.

By the end of 2018, 42 years after the landing of the two Viking seismometers on Mars, InSight will deploy onto Mars' surface the SEIS (Seismic Experiment for Internal Structure) instrument; a six-axes seismometer equipped with both a long-period three-axes Very Broad Band (VBB) instrument and a three-axes short-period (SP) instrument. These six sensors will cover a broad range of the seismic bandwidth, from 0.01 Hz to 50 Hz, with possible extension to longer periods. Data will be transmitted in the form of three continuous VBB components at 2 sample per second (sps), an estimation of the short period energy content from the SP at 1 sps and a continuous compound VBB/SP vertical axis at 10 sps. The continuous streams will be augmented by requested event data with sample rates from 20 to 100 sps. SEIS will improve upon the existing resolution of Viking's Mars seismic monitoring by a factor of ∼ 2500 at 1 Hz and ∼ 200 000 at 0.1 Hz. An additional major improvement is that, contrary to Viking, the seismometers will be deployed via a robotic arm directly onto Mars' surface and will be protected against temperature and wind by highly efficient thermal and wind shielding. Based on existing knowledge of Mars, it is reasonable to infer a moment magnitude detection threshold of M w ∼ 3 at 40 ∘ epicentral distance and a potential to detect several tens of quakes and about five impacts per year. In this paper, we first describe the science goals of the experiment and the rationale used to define its requirements. We then provide a detailed description of the hardware, from the sensors to the deployment system and associated performance, including transfer functions of the seismic sensors and temperature sensors. We conclude by describing the experiment ground segment, including data processing services, outreach and education networks and provide a description of the format to be used for future data distribution.Electronic supplementary materialThe online version of this article (10.1007/s11214-018-0574-6) contains supplementary material, which is available to authorized users

Towards an integrated scientific and social case for human space exploration

I will argue that an ambitious programme of human space exploration, involving a return to the Moon, and eventually human missions to Mars, will add greatly to human knowledge. Gathering such knowledge is the primary aim of science, but science's compart-mentalisation into isolated academic disciplines tends to obscure the overall strength of the scientific case. Any consideration of the scientific arguments for human space exploration must therefore take a holistic view, and integrate the potential benefits over the entire spectrum of human knowledge. Moreover, science is only one thread in a much larger overall case for human space exploration. Other threads include economic, industrial, educational, geopolitical and cultural benefits. Any responsibly formulated public space policy must weigh all of these factors before deciding whether or not an investment in human space activities is scientifically and socially desirable

Rites of Intent: The Participatory Dimension of the City

This paper disseminates from a keynote lecture I delivered at an international conference, Cityscapes in History: Creating the Urban Experience, held at the Centre for Advanced Studies at the Ludwig Maximilian University in Munich in July 2010. The theme of the paper, on architecture and ritual, was in response to a specific request by the conference organisers, and is based on my earlier research interests, particularly relating to pilgrimage and conversion during the period of Early Christianity. This chapter, however, brings this background historical knowledge of architecture and ritual to the contemporary situation, arguing that we have much to learn from the ancient and medieval worlds. Highlighting particular contemporary examples, I argue that the absence of conspicuous ritualized spaces in our cities is largely the result of architects no longer being able to understand certain kinds of spatial language that can facilitate mediation between built form and modes of corporate participation – whether formal or informal. At the same time, the chapter highlights how the use of such terms as ‘ritualised space’ in contemporary architectural discourse is problematic, given that ritual – as an ‘obligatory’ form of participation - is assumed by many to conflict with the expectations of unhindered freedom that has become the mantra of much contemporary architecture. This chapter challenges this preconception by arguing that notions of ritual space in the contemporary world are at one level materially different from those of the past, given the absence of systems of politico/religious hierarchy and authority. At the same time, however, implicit in the everyday events of contemporary urban life is the raw material of richer forms of repeated action than those simply of routine. The cases presented here reveal how a hermeneutical perspective of the historic past provides a productive and creative channel for reinterpreting ritual in the contemporary city

Bridges Structural Health Monitoring and Deterioration Detection Synthesis of Knowledge and Technology

INE/AUTC 10.0

Measuring Liquefied Residual Strength Using Full-Scale Shake Table Cyclic Simple Shear Tests

This research consists of full-scale cyclic shake table tests to investigate liquefied residual strength of #2/16 Monterey Sand. A simple shear testing apparatus was mounted to a full-scale one-dimensional shake table to mimic a confined layer of saturated sand subjected to strong ground motions. Testing was performed at the Parson’s Geotechnical and Earthquake Laboratory at California Polytechnic State University, San Luis Obispo. T-bar penetrometer pullout tests were used to measure residual strength of the liquefied soil during cyclic testing. Cone Penetration Testing (CPT) was performed on the soil specimen throughout testing to relate the laboratory specimen to field index test data and to compare CPT results of the #2/16 Monterey sand before and after liquefaction. The generation and dissipation of excess pore pressures during cyclic motion are measured and discussed. The effects of liquefied soil on seismic ground motion are investigated. Measured residual strengths are compared to previous correlations comparing liquefied residual strength ratios and CPT tip resistance

Radical political unionism reassessed

Defections from European social-democratic parties and a resurgence of union militancy have prompted some to diagnose a new left-wing trade unionism across Europe. This comment on the article by Connolly and Darlington scrutinizes trends in France and Germany but primarily analyses recent developments in Britain. While there are some instances of disaffiliation from the Labour Party, support for electoral alternatives, growth in political militancy and emphasis on new forms of internationalism, these have been limited. There is insufficient evidence to suggest that we are witnessing the making of a new radical collectivism

2020 Projects Day Booklet

https://scholarworks.seattleu.edu/projects-day/1035/thumbnail.jp