Nabataean Water Management Systems. From the 4th century B.C. till the 4th century A.D.

Nabataean civilisation and the topic of their technology has been a subject of debate as long as the re-discovery of the ancient city of Petra in 1803 by Johann Ludwig Burckhardt. The Nabataeans thrived in the deserted regions of today’s Israeli and Jordanian deserts by the usage of an elaborate water supply technology that was perfectly suited for their idea of life in the hostile environment. Water tanks and cisterns hidden in plain sight accumulated water during rainstorms. The same water was later used by travelling Bedouins. Their travel frequently involved conquering thousands of kilometres in order to exchange goods, considered exotic and high in value. The knowledge of hidden water basins and their water storing capabilities gave them a rather big advantage in terms of speed and travel safety. This work aims to describe the ideas and technology that the Nabataeans acquired, additionally trying to identify the source of those ideas whether to pin point their origin as completely self-created or largely influenced from different earlier existing cultures. The Nabataean Kingdom was established during the early 1st century B.C. as a loose conglomerate of nomadic tribes that engaged in the so -called Frankincense trade. During its lifetime, it became one of the most prominent players on the political and economic spectrum of the Arabian world. Described by Strabo in his Georaphica as a tribe of wealthy desert farers Nabataeans became Roman vassals sometime in the 1st century B.C. until the kingdom was disbanded after the death of its last monarch Rabbel the second in the year of 107 A.D. Organised society became even more creative and further advanced their technology. The entire mountainside of the city in Rock called by the ancients Petra was transformed by skilled architects to work as a water collecting vessel. Several tunnels and aqueducts were created for this sole purpose. The world-famous tourist attraction – The Petrean Siq is one of the fruits of this enterprise. Presented paper was divided into several different chapters with the aim of presenting the Nabataean tribe, its history and technological advancements in the field of water gathering and distribution to provide a greater context of its importance for this region. One chapter focused on the history of the archaeological framework done during the almost 200 years of European re-discovery of the region. Divided into two significant sections with focuses on different time periods of Arabian archaeology. The explorers section describes the bios of different names of the most prominent early explorers of the region like Johann Ludwig Burckhardt, Alois Musil and Thomas Edward Lawrence. All of them thoroughly engaged in the history and lifestyle of the region. Second part engages with the work of more modern archaeologists whose fields of expertise include Nabataean water supply technologies but also a different and wider spectrum of additional archaeological work. Sections on climate and geology provide additional understanding on how the Nabataean technology utilizes the natural properties of rocks and soil. Chapter Water Management Systems in different time periods of the Nabataean Kingdom provides a breakdown of known Nabataean technology between the 4th century B.C. and the 4th century A.D. Starting from the Early Bronze Age where we can find traces of people setting up different technological ideas for water capture. Beginning with the usual rock cut ponds that were very prone to water evaporation like the Thamila till the more advanced concepts like wadi terracing and underground water tunnels. With the beginning of the Iron Age technological advancement appeared in the shape of an upgrade that has been done to the water collection basins. Cisterns and water reservoirs littered the desert. Cut in the bedrock and waterproofed by hydraulic mortar they could have stored water for several months. This became a serious breakthrough for the prosperity of the later Nabataean people. Sabaean chapter focuses on a short history of the Sabaean people. A trading nation very much like the Nabataeans. They inhabited the region of today’s country of Yemen and engaged in the very profitable frankincense trade. Growing of the frankincense trees and trying to live in a very hostile environment of the Arabian Peninsula desert prompted the industrious Sabaeans to create and further develop their own water supply technology. Many of such constructions like to world famous Ma’rib Dam stands as a testament to that notion. Many of the Negev and Jordanian desert Bedouins engaged in desert faring trade with the Sabaeans. Their frequent excursions could be one of the elements that weighted very heavily on their knowledge of water supply facilities. Further Chapters go in depth about the water supply technology that the Nabataeans used and further developed over the years. Explaining the intricacies of how do they work and presenting their probable roots. The last chapter consists of Archaeological evidence segregated by country (Israel or Jordan) presenting the most important sites for the Nabataean culture

Microwave Sensing and Imaging

In recent years, microwave sensing and imaging have acquired an ever-growing importance in several applicative fields, such as non-destructive evaluations in industry and civil engineering, subsurface prospection, security, and biomedical imaging. Indeed, microwave techniques allow, in principle, for information to be obtained directly regarding the physical parameters of the inspected targets (dielectric properties, shape, etc.) by using safe electromagnetic radiations and cost-effective systems. Consequently, a great deal of research activity has recently been devoted to the development of efficient/reliable measurement systems, which are effective data processing algorithms that can be used to solve the underlying electromagnetic inverse scattering problem, and efficient forward solvers to model electromagnetic interactions. Within this framework, this Special Issue aims to provide some insights into recent microwave sensing and imaging systems and techniques

Packaging curiosities : towards a grammar of three-dimensional space

Western museums are public institutions, open and accessible to all sectors of the population they serve. Increasingly, they are becoming more accountable to the governments that fund them, and criteria such as visitation figures are being used to assess their viability. In order to ensure their survival in the current climate of economic rationalism, museums need to maintain their audiences and attract an even broader demographic. To do this, they need to ensure that visitors feel comfortable, welcome and secure inside their spaces. They also need to give visitors clear entry points for engaging with and valuing the objects and knowledge on display in exhibitions. This thesis maps a grammar of three-dimensional space with a strong focus on the interpersonal metafunction. Building on the social semiotic tools developed by Halliday (1978, 1985a), Halliday and Hasan (1976), Martin (1992) and Matthiessen (1995), it identifies two interpersonal resources for organising space: Binding and Bonding. Binding is the main focus of the thesis. It theorises the way people's emotions can be affected by the organisation of three-dimensional space. Essentially, it explores the affectual disposition that exists between a person and the space that person occupies by focussing on how a space can be organised to make an occupant feel secure or insecure. Binding is complemented by Bonding. Bonding is concerned with the way the occupants of a space are positioned interpersonally to create solidarity. In cultural institutions like museums and galleries, Bonding is concerned with making visitors feel welcome and as though they belong, not just to the building and the physical environment, but to a community of like-minded people. Such feelings of belonging are also crucial to the long-term survival of the museum. Finally, in order to present a metafunctionally diversified grammar of space, the thesis moves beyond interpersonal meanings. It concludes by exploring the ways textual and ideational meanings can be organised in three-dimensional space

Packaging curiosities : towards a grammar of three-dimensional space

Western museums are public institutions, open and accessible to all sectors of the population they serve. Increasingly, they are becoming more accountable to the governments that fund them, and criteria such as visitation figures are being used to assess their viability. In order to ensure their survival in the current climate of economic rationalism, museums need to maintain their audiences and attract an even broader demographic. To do this, they need to ensure that visitors feel comfortable, welcome and secure inside their spaces. They also need to give visitors clear entry points for engaging with and valuing the objects and knowledge on display in exhibitions. This thesis maps a grammar of three-dimensional space with a strong focus on the interpersonal metafunction. Building on the social semiotic tools developed by Halliday (1978, 1985a), Halliday and Hasan (1976), Martin (1992) and Matthiessen (1995), it identifies two interpersonal resources for organising space: Binding and Bonding. Binding is the main focus of the thesis. It theorises the way people's emotions can be affected by the organisation of three-dimensional space. Essentially, it explores the affectual disposition that exists between a person and the space that person occupies by focussing on how a space can be organised to make an occupant feel secure or insecure. Binding is complemented by Bonding. Bonding is concerned with the way the occupants of a space are positioned interpersonally to create solidarity. In cultural institutions like museums and galleries, Bonding is concerned with making visitors feel welcome and as though they belong, not just to the building and the physical environment, but to a community of like-minded people. Such feelings of belonging are also crucial to the long-term survival of the museum. Finally, in order to present a metafunctionally diversified grammar of space, the thesis moves beyond interpersonal meanings. It concludes by exploring the ways textual and ideational meanings can be organised in three-dimensional space

13th Annual Review of Progress in Applied Computational Electromagnetics at the Naval Postgraduate School, Monterey, CA, March 17-21, 1997, Conference Proceedings Volumes I & II

Includes Volumes 1 &

The search for and location of inhomogeneities in seasonal snowpacks utilizing ground-penetrating radar

The location of singular objects or layered transitions below the surface and properties thereof in the ground are a pivotal topic in geosciences. In mountainous regions is the investigation of objects and layer transitions specifically of interest for the seasonal snowpack, primarily to reduce the threat to humans and infrastructures by natural hazards. Snow avalanches are a major natural hazard causing numerous fatalities throughout the world and they are a direct consequence of snowpack conditions. The annual fatality numbers of avalanches are fairly constant for the last 30 years, while in other fields such as e.g. road traffic these numbers decreased significantly. It can be assumed that the permanent enhancements in active and passive safety systems in road traffic are the reason for the decrease in victim numbers. In the field of professional search and rescue operations or accident prevention in avalanches such as hazard forecast, enhancements of instrumentations are marginal for the last three decades. The present study describes two different assessments for the use of ground-penetrating radar (GPR) systems to improve the instrumentation for the location of buried avalanche victims and the prediction of avalanches. Consequently, it demonstrates the feasibility of radar systems for the detection of inhomogeneities in seasonal snowpacks. With regard to the improvement of current methods to search and locate buried avalanche victims, which are not equipped with a location device (e.g. avalanche beacon), the main objective is to shorten search time. The assessment of this thesis was therefore to use helicopter-borne non-invasive location methods. To simulate helicopter flights, test arrangements were designed to perform field tests from above the surface. I developed methods to measure from 6--12 m above the snow cover. To measure non-invasively, the arrangement is based on pulsed radar technology. To shorten search time and to minimize the influence of man-made error possibilities, an automatic location software was developed. The results of the field tests present the answers of the fundamental questions for an airborne location operation and enabled the development of a location algorithm. Measurements showed, that the sidewise detectable range of 3--5 m of an antenna set-up with one transmitter -- receiver pair is rather small for the given flight height of 6 to 12 m. Furthermore, the reflection amplitude of the snow surface decreases almost linearly with the flight height. Unfortunately, in wet snow avalanches a buried object in the snowpack does not appear as typical reflection pattern and is therefore not explicitly locatable. The developed software algorithm proved to be sufficient for all applied test arrangements in dry snow conditions. The algorithm is able to distinguish between buried victims in the snowpack and reflections caused by only air holes within the snow cover. Further implementations on helicopters can be achieved, based on these results, but more field tests are necessary to adapt the software to the rougher flight conditions in helicopters. Concerning the observation of stratigraphic inhomogeneities within a snowpack, this thesis showed that a record of specific snowpack conditions from beneath the snow cover is feasible with GPR. The assessment of the present work is to provide snowpack information in avalanche endangered slopes and to follow the temporal evolution of the snowpack over a whole season. Two different kinds of field measurements in dry and wet snow conditions were performed to ascertain the GPR set-up, which provides the best trade-off between penetration depth and layer resolution. On the one hand, temporally singular measurements at different locations, concerning altitude, snowpack conditions and climatic regions in the European Alps, enabled the determination of capable test arrangements. On the other hand, a temporal monitoring of the snow cover at a fixed position over several months, facilitated the record of the change of specific parameters in the snowpack. In terms of system parameters, antennas with a center frequency of about 800--900 MHz are able to penetrate and adequately record stratigraphic transitions in dry and wet snow conditions. The radar-measured snow height in dry snow using a mean wave speed value for the conversion of the two-way travel time was in a good agreement to the probed snow depth and arose in an uncertainty slightly higher than of ultrasonic sensors. In terms of snowpack parameters, the recorded signals of the various snow covers were in good agreement with the measured snow properties. For dry snow conditions, the appearance and the manner of reflections recorded in the snow cover corresponded to the size and the algebraic sign of the gradient in snow density. Moisture in the snowpack attenuates the radar signal significantly. This thesis presents encouraging results of the use of impulse radar technology for the location of inhomogeneities in seasonal snowpacks. Parts of the presented results and methodologies (e.g. the automatic location algorithm) are possibly easily adaptable in related areas of geoscientific research and could also provide advances in other, non-snow related fields

Mars, invisible vision and the virtual landscape: immersive encounters with contemporary rover images

How do contemporary imaging devices and the forms in which images are displayed affect our perception of Mars? How are scientists and engineers visually exploring, experiencing and navigating this uninhabitable terrain? Can we better understand this virtual landscape through immersive imaging techniques, or are these simply illusions? At what point does the glitch invade these immersive spaces, throwing us back into the realm of the image? And finally, can the glitch be seen as a method towards another kind of visibility, enabling us to ‘see’ and encounter Mars in productive ways? Through the analysis of contemporary representations of the Martian terrain, Mars, Invisible Vision and the Virtual Landscape: Immersive Encounters with Contemporary Rover Images offers a new contribution to studies of the digital and virtual image. Specifically addressing immersive image forms used in Mars exploration the research is structured around four main case studies: life-size illusions such as panoramas; 3D imaging; false colour imaging; and the concept of a ‘Mars Yard’. The thesis offers a new understanding of human interaction with a landscape only visible through a screen, and how contemporary scientific imaging devices aim to collapse the frame and increase a sense of immersion in the image. Arguing that these representations produce inherently virtual experiences, their transportive power is questioned, highlighting the image as reconstructed – through the presence of a glitch, illusion is broken, revealing the image-as-image. This thesis takes an interdisciplinary approach in which scientific images are analysed through the prism of photography’s relationship to reality, theories of vision and perception, representations of landscape, and digital and virtual image theory. At the heart of this thesis is the act of looking; critical and speculative writing is used to convey immersive encounters with images at NASA and the Jet Propulsion Laboratory (USA); University College London’s Regional Planetary Imaging Facility; Airbus Defence and Space (UK); the photographic archive at the V&A; and the Panorama Mesdag (Netherlands). The research re-examines scientific forms of images against examples from the history of visual culture (be it art or popular culture) to draw parallels between different ways of seeing, representing and discovering the unknown. The eyes of the Mars rovers provide viewpoints through which we regard an alien terrain: windows upon unknown worlds. Rover images bridge a gap between what is known and unknown, between what is visible and invisible. The rover is our surrogate, an extension of our vision that portrays an intuitively comprehensible landscape. Yet this landscape remains totally out of reach, millions of miles away. This distance is an impenetrable boundary – both physically and metaphorically – that new technologies are trying to break. Mars, Invisible Vision and the Virtual Landscape offers a two-way impact, constituting a new approach to the relationship between real and imagined images in order to demonstrate that the real Mars, however it is represented and perceived, remains distant and detached