Entity

Time filter

Source Type


Landrum C.,University of Kentucky | Castrignano A.,Italian Agricultural Research Council | Mueller T.,University of Kentucky | Zourarakis D.,The United States Information Technology Office | And 2 more authors.
Agricultural Water Management | Year: 2014

At the landscape scale, the soil moisture distribution derives from the combination of hydrologic, pedologic, and geomorphic processes. This study uses multicollocated factorial cokriging to determine the spatial scale(s) at which soil properties and terrain attributes affect the soil moisture distribution and can be used to identify homogeneous zones in the field. Georeferenced sensing (e.g. geoelectric sensing and LiDAR) acquires real-time, non-invasive and high resolution data over large spatial extents that can be used in combination with spatial, temporal and scale-dependent information of primary interest. This study uses high resolution geoelectric and LiDAR data as auxiliary measures to supplement data obtained by the analysis of 127 soil cores taken from a 40 hectare Central Kentucky (USA) karst landscape. Shallow and deep apparent electrical conductivities (EC) were measured using a Veris 3100 in tandem with soil moisture on three separate dates with increasing soil moisture contents ranging from plant wilting point up to field capacity. Terrain features were produced from 2010 LiDAR returns collected at ≤1 m nominal pulse spacing. Exploratory statistics were used to identify 12 field characteristics that would be useful in determining the spatial distribution of soil moisture, including terrain features (slope and elevation), soil physical and chemical properties and geoelectric measurements (EC for each date). A linear model of coregionalization (LMC) was fitted to the matrix of direct and cross experimental variograms for the 12 characteristics. The LMC consisted of 3 basic components: nugget, spherical (short-range scale = 40 m) and exponential (long-range scale = 250 m) where each component explained 17%, 22% and 60% of the total measured variation, respectively. Results suggest that soil texture and organic matter affect the soil moisture variability. Mapping the long-range regionalized factor allows us to delineate the field into homogeneous zones. This study shows the potential for using proximal sensing and multivariate geostatistics to develop soil moisture management strategies under water stressed conditions. © 2014 Elsevier B.V. Source


Mateik D.,The United States Information Technology Office
Proceedings ACM SIGUCCS User Services Conference | Year: 2010

Exposing faculty to one another's instructional challenges and accomplishments and enabling them to network has been the motivation behind an annual conference at the University of Maryland for nearly 20 years. The instructional technology experiences of three intrepid early adopters were showcased in the University's first half-day Teaching with Technology symposium in 1993. By 1999 the symposium blossomed into a full-day conference where presentations by 12 instructors continued to emphasize different forms of technology in the classroom, but, oddly enough, integrated only minimal use of technology in the presentations themselves. As technology in the classroom became ubiquitous, the sponsoring conference hosts believed it was time to change the focus of the conference from technology in teaching to innovation in teaching and learning. This paper will briefly trace lessons learned in the evolution of the Innovations in Teaching and Learning Conference [1]. It will additionally focus on our recent integration of technologies such as Twitter, lecture capture tools, QR codes and streamed broadcasting, which enable us to model uses of instructional technology tools and to make the conference available to a broader audience. © 2010 ACM. Source


Kelly W.R.,U.S. National Institute of Standards and Technology | Pratt K.W.,U.S. National Institute of Standards and Technology | Guthrie W.F.,U.S. National Institute of Standards and Technology | Martin K.R.,The United States Information Technology Office
Analytical and Bioanalytical Chemistry | Year: 2011

Origin and early history of Die Methode des Eichzusatzes or The Method of Standard Addition with primary emphasis on its origin, early design, dissemination, and usage of terms is discussed. Die Methode des Eichzusatzes or literally 'the method of calibration addition' was first used and described by Hans Hohn in 1937 in his book Chemische Analysen mit dem Polarographen. Polarography was a very popular and much used technique well into the 1960s until the advent of modern spectroscopy. The literal English translation of Eichzusatzes into calibration addition comes from joining the verb, eichen, and the noun, Zusatz, which mean to calibrate and addition, respectively. The two-level design described by Kolthoff and Lingane was the design originated by Hohn and subsequently used by all early polarographers. Source


Donald C.,The United States Information Technology Office
Proceedings ACM SIGUCCS User Services Conference | Year: 2011

In this paper, I describe the process the Office of Information Technology (OIT) followed in creating our Computing @ newsletter and other print materials while meeting our university branding requirements. I also describe our methodology for teaching these same processes to members of our faculty, staff, and graduate departments. It is not my intention to provide a word for word example of my presentation. Since the materials I will be referencing are all available online, it seems unnecessary to reproduce them in their entirety here. I will go into each section in greater detail as I speak about our specific experiences in regards to these topics. Source


Zourarakis D.P.,The United States Information Technology Office
American Society for Photogrammetry and Remote Sensing Annual Conference 2010: Opportunities for Emerging Geospatial Technologies | Year: 2010

In Kentucky's Eastern Coal Fields physiographic region, mining and reclamation activities often result in stream modification, potentially leading to the creation of new ponds and reservoirs. Incorporation of these changes as part of updates to the National Hydrography Dataset is proceeding slowly. The 2001-2005 Kentucky Landscape Census modernization of the NLCD01 demonstrated the extremely dynamic characteristic of the landscape in that region of the state where major land cover changes are due to resource extraction. Timely, in-situ monitoring and assessment of waterbodies created or modified in permitted mining operations would prove costly for government agencies. This paper explores the use of multitemporal change analysis, based on Landsat 5 TM and aerial, multispectral imagery for the detection of new waterbodies in areas affected by mining activities. Source

Discover hidden collaborations