Siteless Survey and Intensive Data Collection in an Artifact-rich Environment: Case Studies from the Eastern Corinthia, Greece

Archaeological survey in the eastern Mediterranean has become increasingly intensive over the last 20 years, producing greater and more diverse data for smaller units of space. While complex, siteless data sets have allowed more sophisticated reconstructions of natural and cultural regional histories, the employment of more intensive methods has refocused the scope of Mediterranean surveys from region to ‘micro-region’. Such increasingly myopic approaches have been criticized for their failure to address research questions framed by a large-scale, regional perspective and the analytical categories of ‘settle- ment’ and ‘site’. This paper uses results from a survey in southern Greece to show how artifact-based approaches make valuable contributions to ‘big-picture’ historical and archaeological issues in a Mediter- ranean context

Review: Corinth in late antiquity: a Greek, Roman, and Christian city, by Amelia R. Brown

There are few urban centers so rich in late antique archaeology as Corinth, the city near the Isthmus of Greece. Excavations there since by staff and students of the American School of Classical Studies at Athens have generated an enormous corpus of information related to the Roman forum and its surroundings. Other major projects in the region carried out by Greeks and Americans especially have shed light on Corinth’s harbors, Isthmian sanctuary, fortifications, Christian basilicas, and rural sites and villas. Collectively, archaeology has produced such rich evidence for Late Antiquity in this region that a barrage of specialized studies over the last generation have effectively overturned old historical narratives of urban deca

Archaeological Data and Small Projects: A Case Study from the Pyla-Koustopetria Archaeological Project on Cyprus

A case study in how small projects use digital tools

Life in Abandonment: The Village of Lakka Skoutara, Corinthia

This is a pre-review, preprint of a contribution to volume on abandonment in antiquity edited by Deb Brown and Rebecca Seifried that will by published by The Digital Press at the University of North Dakota in 2019. The article documents visits to an "abandoned" settlement called Lakka Skoutara in the southeastern Corinthia over a period of over 15 years. These visits show that far from being abandoned and neglected, the buildings at the site, some of which date to the early 20th century, continue to be the centers of various activities, modifications, use, and curation

An Experimental Study of Ignition Effects and Flame Growth Over a Thin Solid Fuel in Low-Speed Concurrent Flow Using Drop-Tower Facilities

An experimental study of ignition and flame growth over a thin solid fuel in oxidizer flow speeds from 0 to 10 cm/sec concurrent flow was performed. This study examined the differences between ignition using a resistively heated wire (woven in a sawtooth pattern over the leading edge of the fuel), and a straight resistively heated wire augmented by a chemical ignitor doped onto the leading edge of the fuel. Results showed that the chemical system yielded non-uniform ignition bursts, while the system using only the hotwire gave more uniform ignition. At speeds up to 2.5 cm/sec, the chemical system yielded non-uniform pyrolysis fronts, while the hotwire system gave more uniform pyrolysis fronts. At speeds of 5 cm/sec or greater, both systems gave uniform pyrolysis fronts. The chemically-ignited flames tended to become too dim to see faster than the hotwire-ignited flames, and the flame lengths were observed to be shorter (after the initial burst subsided) for the chemical system for all speeds. Flame and pyrolysis element velocities were measured. Temperature profiles for selected tests were measured using thermocouples at the fuel surface and in the gas phase. Comparisons between the flame element velocities and peak temperatures recorded in these tests with calculated spread rates and peak temperatures from a steady-state model are presented. Agreement was found to be within 20% for most flame elements for nominal velocities of 5 cm/sec and 7.5 cm/sec

Analysis of cloud and cloud-to-ground lightning in winter convection

The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file.Title from title screen of research.pdf file (viewed on June 15, 2009)Vita.Thesis (Ph. D.) University of Missouri-Columbia 2008.The combination of the full suite of cloud-to-ground (CG) and cloud stroke data is used to observe lightning in precipitation events involving winter precipitation. In particular, we observe data for the winter season of 2006 to 2007 for winter events that generated the weather phenomenon known as thundersnow. Only 1.4% of all lightning observed were associated with winter precipitation in 14 events involving thundersnow. Cloud flashes made up 31.4% of the observed lightning in winter precipitation. Further, 92.0% of the observed CG strokes were found to have a negative polarity. Storm total diagrams showed the dominance of low amplitude negative strokes (between - 10 and - 30 kA) in each storm. Lightning in winter precipitation had a cloud-to-CG ratio of 0.46 (1 cloud to 2.2 CG strokes) throughout the season. Analysis of 24-hour diurnal trends in the winter lightning showed a tendency for greater activity between 0000 and 0400 UTC. Composite soundings from Rapid Update Cycle (RUC) initial fields showed a similarity to previous work done on proximity soundings in thundersnow events. Further, comparisons to an elevated warm precipitation event showed similarity in the vertical profiles. However, the diurnal characteristics of the lightning show no similarity as do synoptic and mesoscale environments surrounding the event.Includes bibliographical reference

Repair of Electronics for Long Duration Spaceflight

To reduce mission risk, long duration spaceflight and exploration activities will require greater degrees of self-sufficiency with regards to repair capability than have ever been employed before in space exploration. The current repair paradigm of replacing Orbital Replacement Units (ORUs) of malfunctioning avionics and electronic hardware will be impractical, since carrying all of the spares that could possibly be needed for a long duration mission would require upmass and volume at unprecedented and unacceptable levels. A strategy of component-level repair for electronics, however, could significantly reduce the mass and volume necessary for spares and enhance mission safety via a generic contingency capability. This approach is already used to varying degrees by the U.S. Navy, where vessels at sea experience some similar constraints such as the need for self sufficiency for moderately long time periods, and restrictions on volume of repair spares and infrastructure. The concept of conducting component-level repairs of electronics in spacecraft requires the development of design guidelines for future avionics (to enable repair), development of diagnostic techniques to allow an astronaut to pinpoint the faulty component aboard a vastly complex vehicle, and development of tools and methodologies for dealing with the physical processes of replacing the component. This physical process includes tasks such as conformal coating removal and replacement, component removal, replacement, and alignment--all in the difficulty of a reduced gravity environment. Further, the gravitational effects on the soldering process must be characterized and accounted for to ensure reliability of the newly repaired components. The Component-Level Electronics-Assembly Repair (CLEAR) project under the NASA Supportability program was established to develop and demonstrate the practicality of this repair approach. CLEAR involves collaborative efforts between NASA s Glenn Research Center, Langley Research Center, Johnson Space Center, the National Center for Space Exploration Research, and the U.S. Navy. The project goals are 1) develop and demonstrate a manually-operated electronics repair capability to be conducted in a spacecraft environment; and 2) develop guidelines for designs of electronics that facilitates component-level repair for future space exploration efforts. This multi-faceted program utilizes a cross-disciplinary approach to examine pre- and post-repair diagnostics, conformal coating removal and replacement, component soldering, and electronics design for supportability. These areas are investigated by a combination of trade studies, ground based testing, reduced gravity aircraft testing, and actual spaceflight testing on the International Space Station (ISS) in multiple experiments. This paper details the efforts of this program, with emphasis on early trade study results, ground-based efforts, and two upcoming ISS experiments

Towers and Fortifications at Vayia in the Southeast Corinthia

An article describing and analyzing the rural towers in the Southeast Corinthia, Greece

In-Flight Manual Electronics Repair for Deep-Space Missions

Severe limitations on mass and volume available for spares on long-duration spaceflight missions will require electronics repair to be conducted at the component level, rather than at the sub-assembly level (referred to as Orbital Replacement Unit, or 'ORU'), as is currently the case aboard the International Space Station. Performing reliable component-level repairs in a reduced gravity environment by crew members will require careful planning, and some specialty tools and systems. Additionally, spacecraft systems must be designed to enable such repairs. This paper is an overview of a NASA project which examines all of these aspects of component level electronic repair. Results of case studies that detail how NASA, the U.S. Navy, and a commercial company currently approach electronics repair are presented, along with results of a trade study examining commercial technologies and solutions which may be used in future applications. Initial design recommendations resulting from these studies are also presented