Archaeological Survey of Upper Leon Creek Terraces, Bexar County, Texas

In June and July 1994, the Center for Archaeological Research (CAR) of The University of Texas at San Antonio (UTSA) conducted an archaeological survey on a 147-acre tract of land along Leon Creek in northern San Antonio for Pape-Dawson Engineers. The archaeological work was needed for compliance with U. S. Army Corps of Engineers permit requirements before construction of a water storage facility. Four archaeological sites (41BX40, 4IBX47 , 4IBX48, and 4IBX50) had been recorded within this area in 1970 by avocational archaeologists. Additionally, CAR staff members conducted a brief reconnaissance over a 60-acre portion of the property in 1992. Fieldwork consisted of pedestrian survey, 222 shovel tests, one 1-x-1-m test unit, backhoe trenches, plowing, and a geomorphological study by Lee Nordt of Texas A&M University. Evidence from this work suggests that two of the previously recorded sites, 4IBX40 and 4IBX47, are actually part of a single, largely intact, Early and Middle Archaic period site covering approximately 30 acres of the project area. The single site will retain the trinomial 4IBX47. The site contains three components: a Middle Archaic one in the upper 50 cm of the northern part of the site; an Early Archaic component, also in the upper 50 cm, found in the western part of the site; and a component of unknown age buried approximately 80-120 cm below the surface in the central part of the site. A transitional Archaic projectile point was found outside the boundaries of 4IBX47. Further investigation of this site is recommended before construction of the water storage facility. A series of simulated sampling experiments was also conducted with the shovel test data to evaluate the effectiveness of different sampling designs

Archaeological Survey of Laughlin Air Force Base, Val Verde County, Texas

During the spring of 1994, the Center for Archaeological Research of The University of Texas at San Antonio conducted a 100-percent pedestrian survey of Laughlin Air Force Base and the Air Force Recreation Area and Marina in Val Verde County, Texas. In addition to the survey, limited paleontological and geomorphological evaluations were made. One historic site, eight prehistoric sites, and one large site with both prehistoric and historic components were recorded. Additionally, three pre viously recorded sites (De Vore 1993) were revisited. Diagnostic projectile points representing Late Paleoindian through Late Prehistoric occupations were recovered from five of the prehistoric sites. Late-nineteenth- and early twentieth-century artifacts were recovered from the Historic-period sites. Eleven of the 13 total sites are recommended as eligible for nomination to the National Register of Historic Places

WHAT DOES A DOMAIN ANALYSIS LOOK LIKE IN FORM, FUNCTION, AND GENRE?

This article presents an inventory what theorists describe as the definition of domain analysis. Survey writings on and of domain analyses for their distinct attributes and arguments. Compile these components and attributes, linking them to their function, and from there. Describe a proposed ideal form of domain analysis. Evidence that while the debate about the substance and form of the epistemic and ontological character of domain analysis will continue, some might find it useful to give shape to their ideas using a particular form that follows function. If our purpose is to delineate and communicate what it is that we are analyzing when we engage in domain analysis, then I hope this small contribution can be of use

Ultrasonic Phased-Array Characterization for NDE Applications

Southwest Research Institute (SwRI) recently fabricated and delivered the 100-channel Ultrasonic Phased-Array Testbed System (UPATS) for NASA's Langley Research Center. NASA prepared the specifications and provided the funding to develop UPATS in order to provide a tool for the improvement of ultrasonic nondestructive evaluation (NDE) and characterization of materials. UPATS incorporates state-of-the-art phased-array concepts such as beam steering, focusing, apodization, and phase-sensitive detection which make it possible to develop more sophisticated testing methodologies. It also can be used to investigate fundamental ultrasonic propagation and detection phenomena such as refraction, diffraction, scattering, and beam broadening

Commissioning of Dedicated Furnace for Nb3Sn Coatings of 2.6 GHz Single Cell Cavities

We present the results of commissioning a dedicated furnace for Nb3Sn coatings of 2.6 GHz single cell cavities. Nb3Sn is a desired coating due to its high critical temperature and smaller surface resistance compared to bulk Nb. Usage of Nb3Sn coated cavities will greatly reduce operating costs due to decreased dependance on cryo cooling. Tin is deposited by use of a tin chloride nucleation agent and tin vapor diffusion. Analysis of the resultant coating was performed using SEM/EDS to verify successful formation of Nb3Sn. Witness samples in line of sight of the source were used in order to understand the coating efficacy.Comment: 21st Intl Conf Radio Frequency Superconductivity (SRF 2023

Preservation of the High Quality Factor and Accelerating Gradient of Nb3Sn-coated Cavity During Pair Assembly

Two CEBAF 5-cell accelerator cavities have been coated with Nb3Sn film using the vapor diffusion technique. One cavity was coated in the Jefferson Lab Nb3Sn cavity coating system, and the other in the Fermilab Nb3Sn coating system. Both cavities were measured at 4 K and 2 K in the vertical dewar test in each lab and then assembled into a cavity pair at Jefferson Lab. Previous attempts to assemble Nb3Sn cavities into a cavity pair degraded the superconducting properties of Nb3Sn-coated cavities. This contribution discusses the efforts to identify and mitigate the pair assembly challenges and will present the results of the vertical tests before and after pair assembly. Notably, one of the cavities reached the highest gradient above 80 mT in the vertical test after the pair assembly.Comment: 21st Intl Conf Radio Frequency Superconductivity (SRF 2023

Archaeological Investigations at Four San Antonio Missions: Mission Trails Underground Conversion Project

This report contains the results of archaeological work performed by the Center for Archaeological Research (CAR) at The University of Texas San Antonio (UTSA) for City Public Service (CPS). The archaeological investigation and monitoring for the Mission Trails Underground Conversion Project was carried out under Texas Historical Commission (THC) Permit Number: 2020, and the work was conducted at each of the four historical San Antonio missions which make up San Antonio Missions National Historical Park. The Mission Trails Underground Conversion Project was created to enhance and upgrade electrical and utility connections by replacing aboveground connections with underground connections at each ofthe four missions. Mission San Juan (41BX5)-In October of 1998, personnel from CAR began archaeological investigations at Mission San Juan Capistrano in advance of the proposed installation of underground utility lines for the Mission Trails Underground Conversion Project. The purpose of the investigation was to test for intact, buried cultural features in advance of trenching activities involved in the relocation of utility lines and connections. CAR archaeologists developed a plan regarding the area to be impacted which included ten 1 x 1-m excavations units and a series of twelve shovel tests along the proposed path of the utility trench. Excavation units uncovered evidence of existing buildings, wall foundations and Colonial-period flooring episodes, revealing new data west of the known structures and not previously accounted for. Further excavations are warranted to determine the nature of features such as a Colonial-period wall revealed near one of the excavation units. This material discovered by the archaeological investigations resulted in the altering of the projected utility trench alignment to avoid disturbing deposits. Further archaeological investigations are recommended for the newly revealed features. Mission San Jose (41BX3)- In January of 1999, personnel from CAR began archaeological investigations at Mission San Jose y San Miguel de Aguayo in advance of the proposed installation of underground utility lines for the Mission Trails Underground Conversion Project. The purpose of the investigation was to test for intact, buried cultural features in advance of trenching activities involved in the relocation of utility lines and connections. CAR archaeologists conducted a series of shovel tests along the center-lines of the proposed utility trenches to identifY areas of possible impact to intact Spanish Colonial cultural materials. In addition to shovel testing, monitoring of the trenching was conducted in areas where the possibility of impacting cultural material was high. An early-twentieth century trash midden was encountered during monitoring of the trench where it paralleled the Service Drive in the northwest comer of the Mission compound. This material did not warrant altering the course of the trench, and no further archaeological work is recommended at this time. Mission Concepcion (41BX12)- In January of 1999, personnel from CAR began archaeological investigations at Mission Nuestra Senora de la Purisima Concepcion as part of the Mission Trails Underground Conversion Project. A construction crew, while excavating a manhole designed to provide access to underground electrical utilities, had unearthed a large number of animal bones. After concluding a large feature had been unexpectedly impacted, CAR conducted test excavations to ascertain the nature of this feature. It was determined to be a section of an acequia which had been refilled during the Colonial period with construction debris and trash, including a large number of animal bones. Test units and the original manhole excavations allowed for a profile of the acequia to be constructed. This information combined with previous archaeological work and historical research, allowed a tentative proposal on the sequence of acequia construction and re-routing for the Concepcion mission. Monitoring of other underground work conducted in the area resulted in the discovery of a location of a Colonial-period wall, southeast of the Visitors\u27 Center, which may be a portion of the original south wall of the mission. It is recommended that if any further work is required, consideration should be given to testing and/or monitoring to reduce the risk of negative impact to historic remains. Mission Espada (41BX4)- In July of 1999, personnel from CAR began archaeological investigations at Mission San Francisco de la Espada in advance of the proposed installation of underground utility lines for the Mission Trails Underground Conversion Project. From initial discussions, it was noted that the proximity of the proposed route of the underground utility trench could have an impact on the old compound walls of the mission and the path was altered to avoid any possible impact. A series of thirteen shovel tests were conducted in advance along the altered path of the proposed utility trench as it progressed from the southwest comer of the mission compound across the dry irrigation ditch or acequia to the northwest. Monitoring of the trenching activities followed with no significant deposits being exposed. No further work is recommended within the project area, but if future construction is to occur in the area between the utility trench and the Church at Mission Espada, monitoring should then be considered

Excavations at Mission San Jose Y San Miguel de Aguayo, San Antonio, Texas

This report details an archaeological study of Mission San Jose y San Miguel de Aguayo conducted during the spring and summer of 1993. The study was undertaken by the Center for Archaeological Research of The University of Texas at San Antonio, in accordance with a contract between the National Park Service (owner) and Cox/Croslin and Associates (sponsor). The principal research objective focused on determining the extent of impact the planned visitors\u27 center construction and improvements would have on the mission\u27s Spanish colonial features. Backhoe trenching, shovel testing, and unit excavations were used in the areas to be impacted by the visitors\u27 center. Additionally, shovel testing was conducted on a 50-ft grid within the mission compound to obtain information for future correction of drainage problems. Analyses of ceramics, faunal remains, stratigraphy, and artifact distribution allow inferences concerning diet, temporal contexts, and recognition of intact Colonial deposits. Recommendations are made concerning present and future construction