Tree Graphs and Orthogonal Spanning Tree Decompositions

Given a graph G, we construct T(G), called the tree graph of G. The vertices of T(G) are the spanning trees of G, with edges between vertices when their respective spanning trees differ only by a single edge. In this paper we detail many new results concerning tree graphs, involving topics such as clique decomposition, planarity, and automorphism groups. We also investigate and present a number of new results on orthogonal tree decompositions of complete graphs

The Medio Creek Site (41BX1421): National Register Test Excavations, Bexar County Texas

During April 2001, the Center for Archaeological Research of The University of Texas at San Antonio conducted National Register of Historic Places eligibility testing for archeological site 41BX1421, located in southwest Bexar County, Texas, under contract with the Texas Department of Transportation. The investigations were conducted under Texas Antiquities Permit Number 2569. The Phase II testing fieldwork consisted of excavation of five test units across the site to investigate cultural deposits encountered during the previous survey phase. A single sheet midden consisting of burned limestone cobbles was encountered across the majority of the site. In concert with the archeological field investigations, the following special analyses and studies were performed to aid the determination of site integrity and eligibility: radiocarbon, lithic, aboriginal ceramic, vertebrate faunal. and magnetic sediment susceptibility. The synthesis of these analyses has provided adequate data to determine 41BX1421 ineligible for the National Register of Historic Places. It is therefore recommended that the Loop 1604 improvements proceed without further cultural resources investigations

Archeological Data Recovery Excavations along Becerra Creek (41WB556), Webb County, Texas

From June through August 2000, The Center for Archaeological Research of The University of Texas at San Antonio conducted archeological data recovery for prehistoric site 41WB556, under contract with Texas Department of Transportation. The investigations were conducted under Texas Antiquities Permit Number 2412. The Phase III data recovery consisted of excavation of 64 1-m2 units across the site in order to investigate significant cultural deposits encountered during the previous survey and testing phases. In concert with the archeological field investigations, the following special analyses and studies were performed to aid the determination of site integrity and chronology: geoarcheology, radiocarbon dating, lithic, lipid residue, vertebrate faunal, carbon/nitrogen isotope, macrobotanical, and magnetic soil susceptibility. The synthesis of these analyses provides substantive insights into the lifeways of the region’s prehistoric hunter-gatherers

Camp Maxey IV Archaeological Testing of Six Sites, Lamar County, Texas

From June 14 through July 4, 2001, the Center for Archaeological Research of The University of Texas at San Antonio conducted National Register of Historic Places eligibility testing of six prehistoric archaeological sites (41LR190, 41LR194, 41LR196, 41LR200, 41LR258, and 41LR259) at Camp Maxey, Lamar County, Texas, under contract with the Texas Army National Guard. The investigations were conducted under Texas Antiquities Permit No. 2180. The Phase II testing fieldwork consisted of the excavation of twelve backhoe trenches and nineteen 1 x 1-m test units across the sites to investigate significant cultural deposits encountered during the previous survey phase. In concert with the archaeological field investigations, lithic and native ceramic analyses and magnetic sediment susceptibility studies were performed to aid in the determination of site integrity and eligibility. The synthesis of these analyses has provided adequate data to determine temporal integrity and recommendation of National Register eligibility for site 41LR190. Further cultural resources investigations in the form of Phase III data recovery excavations are thus recommended for this site prior to proposed development. Conversely, due to lack of significance criteria, sites 41LR194, 41LR196, 41LR200, 41LR258, and 41LR259 are recommended as ineligible for inclusion in the National Register and require no further cultural resources investigations

Royal Coachman (41CM111) An Early Middle Archaic Site along Cordova Creek in Comal County, Texas

The Royal Coachman site, 41CM111, is bisected by FM 306 near the highway’s eastern crossing of the Guadalupe River. Archeologists from the Texas Department of Transportation conducted extensive excavations at the site in 1980 and the Center for Archaeological Research carried out fieldwork related to geomorphic assessment of the deposits in 2002. The site contains at least three archeological components, an upper zone that may be of late Middle Archaic age and two commingled lower zones that are early Middle Archaic in age and contain a mix of Nolan/ Pandale and Bell-Andice/Early Triangular points. The deeper, more strongly manifested archeological components are associated with a dense burned rock sheet midden composed of two in situ features among a dense scatter of highly disturbed burned rock. Radiocarbon assays place this zone at between 5320–5880 years BP. The lithic assemblage is suggestive of tool manufacture and retooling activities and the projectile point collection is dominated by Early Triangular points and preforms. It is the recommendation of CAR that site 41CM111 warrants designation as a State Archeological Landmark and is eligible for listing on the National Register of Historic Places because of its significant contribution to a better understanding of the regional archeological record. We believe that these investigations have resulted in an appropriate level of work to evaluate the archeological property within the highway ROW and no further work is currently recommended. We also recommend that TxDOT consider avoidance as an option during future construction activities to avert impact to remaining deposits. In addition, if new ROW is acquired, additional work is warranted to determine the extent and significance of currently unidentified material. This work was conducted under Texas Antiquities Committee Permit No. 2807

Investigation of Blade-row Flow Distributions in Axial-flow-compressor Stage Consisting of Guide Vanes and Rotor-blade Row

A 30-inch tip-diameter axial-flow compressor stage was investigated with and without rotor to determine individual blade-row performance, interblade-row effects, and outer-wall boundary-layer conditions. Velocity gradients at guide-vane outlet without rotor approximated design assumptions, when the measured variation of leaving angle was considered. With rotor in operation, Mach number and rotor-blade effects changed flow distribution leaving guide vanes and invalidated design assumption of radial equilibrium. Rotor-blade performance correlated interpolated two-dimensional results within 2 degrees, although tip stall was indicated in experimental and not two-dimensional results. Boundary-displacement thickness was less than 1.0 and 1.5 percent of passage height after guide vanes and after rotor, respectively, but increased rapidly after rotor when tip stall occurred

Selecting tornado shelters

The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311.Biosystems and Agricultural Engineerin

Stack pattern effects on wind forces in open buildings

The Oklahoma Cooperative Extension Service periodically issues revisions to its publications. The most current edition is made available. For access to an earlier edition, if available for this title, please contact the Oklahoma State University Library Archives by email at [email protected] or by phone at 405-744-6311.Biosystems and Agricultural Engineerin

Ġungla

Ġabra ta’ poeżiji u proża li tinkludi: Tliet battuti mhux kompluti ta’ Mario Azzopardi – Ittra ta’ mara ħalliema ta’ Mario Azzopardi – Imħabba sewda ta’ Ġorġ Borg – Naf tifel ta’ Ġorġ Borg – Metaforosi ta’ Alfred Degabriele – Bħan-nar tal-festi ta’ Alfred Degabriele – Temporale ta’ Victor Fenech – Foresti-Xita ta’ Victor Fenech – Qamar tal-vikingi ta’ Charles Flores – Pakkett nru. 49 ta’ Charles Flores – Il-bieb imsakkar ta’ Oliver Friggieri – Kull ħolma tqila ta’ Oliver Friggieri – Wara l-bwieb tal-ħġieġ ta’ Raymond Mahoney – Femminista ta’ Albert Marshall – Vudu ta’ Albert Marshall – Serp ta’ Daniel Massa – M 42: Saif u riġel ta’ Daniel Massa – Blanzun ta’ Achille Mizzi – Tifsir ta’ Achille Mizzi – Is-snin ta’ Frans Sammut – Stqarrija ta’ Philip Sciberras – Ġungla ta’ Philip Sciberras.peer-reviewe