172,797 research outputs found
Shag Mattson Interview, ca. 1977
No full textShag Mattson was 77 years old and a lifetime Hoffman resident. He worked in a drugstore for a time.
In this interview, Shag reflects on his time working in a drugstore. He relates his experiences from his career as a rural mail carrier. He discusses his role as a coordinator of the Senior Citizens Center and the creation of the Red Rock Golf Course.https://digitalcommons.morris.umn.edu/kmrs/1073/thumbnail.jp
Ruth Oseid and Karen Sutherland Look at a Plaque Honoring their Father, Dr. C. Henning Mattson
No full textDaughters of Dr. C. Henning Mattson - Ruth Oseid and Karen Sutherland, daughters of Dr. C. Henning Mattson, standing near a plaque honoring their father at Mattson Hall on the campus of Bethesda Hospital. See Advance, Nov-Dec 1962, page 8 for additional information
Mattson, Guy C. - China, 1979
No full textChemistry professor Guy Mattson, standing in front of a Chinese pogoda in 1979. He joined FTU (UCF) in 1969.https://stars.library.ucf.edu/univphotocollection/1603/thumbnail.jp
C MTT 124-0557, Brown vase with incised fish design
No full textJulia Mattson graduated from the University of North Dakota in 1924 with a B.A.
in art and education. An exceptional student of Margaret Kelly Cable’s, she was appointed Instructor in Ceramics upon graduation. During that time she created thousands of pieces of pottery, taught, and gave lectures and demonstrations both regionally and nationally. Mattson received a Master’s Degree in educational psychology and ceramics from UND in 1951 and retired from the University in 1963.
Mattson’s work during the post-war years reflected the influence of the decorative, modernistic, and abstract trends of the time. The abstract fish motif on the vase is reflective of that era.
Included in Fables, Insults, and Reverence: The Animals of UND Art Collections Exhibition at the UND Art Collections Gallery in the Empire Arts Centerhttps://commons.und.edu/pottery/2052/thumbnail.jp
Male preference for conspecific females depends on male size in the splendid darter, Etheostoma barrenense
No full textWe sought to expand existing knowledge of mate preference in the darter fish species Etheostoma barrenense by investigating whether variation in preference for conspecifics among individual males correlates with body size and coloring. We observed that only large males preferred conspecific females and no effect due to coloration. This result may indicate that preferences are expressed only by older males, or males with a competitive advantage, as both may be correlated with larger body size. If larger males are indeed older, our finding suggests a possibility of learned mate choice in darters.
Standard body lengths of all individuals were measured with a digital caliper, and males were designated as ‘small’ ( 45 mm). Dichotomous mate choice trials were conducted presenting two female stimuli, one E. barrenense and one Etheostoma zonale, to a male E. barrenense. Time spent in the conspecific and heterospecific association zone was recorded and used to calculate proportion of time spent associating with the conspecific and heterospecific female and strength of preference (SOP). SOP was calculated as SOP = (TC¬ – TH) / (TC¬ + TH), where TC is the time spent in the conspecific association zone and TH is time spent in the heterospecific association zone. SOP ranges from +1 to -1, representing complete preference for the conspecific or heterospecific female, respectively. Following trials, fish were euthanized and photographed. Males’ standard lengths were measured digitally, and coloration was quantified using the software ImageJ. We quantified proportion of red body coloration and a ‘red score,’ calculated by measuring the average red(R), green(G) and blue (B) pixel values for red body area and dividing R by the sum of the averaged RGB pixel values. Larger red scores indicate more saturated red coloration, with a score of 1 indicating pure red.
Data is recorded in the file “raw_data.csv.” We used R to perform appropriate hypothesis tests, treating male size as a categorical variable, and to generate a linear model testing the effect of male size and colour, as continuous variables, on SOP. Lastly, we performed post hoc analyses to determine any effect of female size on our findings, including a comparison of female size within trials and a linear model comparing the standard length of the male and his preferred female. All analyses are available in the file “all code.R.”
Trials were videorecorded from ‘top’ and ‘side’ viewpoints. No significant difference was found for trials with recordings from both. One view was randomly chosen for analysis for these trials. These data are recorded in the file “view.csv.” Three photographed males could not be matched to their behavioural trial and one photographed male was not used in behavioural trials. Therefore, behavioural trials were performed on N=17 males, colour analysis was performed on N=18 males, and linear modelling was performed on N=14 males
A note on the Assmus--Mattson theorem for some ternary codes (a resume)
No full textLet be a two and three-weight ternary code. Furthermore, we assume that
are -designs for all by the Assmus--Mattson theorem. We show
that . As a corollary, we provide a new characterization of the
(extended) ternary Golay code.Comment: 6 pages, this is a resume of "A note on the Assmus--Mattson theorem
for some ternary codes
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
On Lee Association Scheme over , Terwilliger algebras and the Assmus-Mattson Theorem (Research on finite groups, algebraic combinatorics and vertex operator algebras)
No full textLet C denote a linear code of length n over a finite field _{q} and let C^{perp} denote the corresponding dual. The Assmus-Mattson theorem states that combinatorial designs can be obtained from the supports of codewords of C with fixed weight type whenever the Hamming weight enumerators of C and C^{perp} satisfy certain conditions. This famous result has been strengthened and extended to many different settings including the Assmus-Mattson type theorems for mathbb{Z}_{4}-linear codes due to Tanabe (2003), and due to Shin, Kumar and Helleseth (2004). In this paper, we discuss an Assmus-Mattson type theorem for block codes where the alphabet is the vertex set of some commutative association scheme. This particular theorem generalizes the Assmus-Mattson type theorems mentioned above as well as the original. In proving our results, we invoke several techniques from multivariable polynomial interpolation and from the representation theory of Terwilliger algebras. This is based on a joint work with Hajime Tanaka
Cobalt and iron segregation and nitride formation from nitrogen plasma treatment of CoFeB surfaces
No full textCobalt-iron-boron (CoFeB) thin films are the industry standard for ferromagnetic layers in magnetic tunnel junction devices and are closely related to the relevant surfaces of CoFe-based catalysts. Identifying and understanding the composition of their surfaces under relevant processing conditions is therefore critical. Here we report fundamental studies on the interaction of nitrogen plasma with CoFeB surfaces using infrared spectroscopy, x-ray photoemission spectroscopy, and low energy ion scattering. We find that, upon exposure to nitrogen plasma, clean CoFeB surfaces spontaneously reorganize to form an overlayer comprised of Fe2N3 and BN, with the Co atoms moved well below the surface through a chemically driven process. Subsequent annealing to 400 °C removes nitrogen, resulting in a Fe-rich termination of the surface region. © 2016 Author(s).National Science Foundation (Grant No. CHE1300180)Erik Jonsson School of Engineering and Computer Scienc
Group Picture of: Rev, John Helmer Olson, Rev. P. A. Fair, Mr. Karl E. Mattson, Rev Joseph E. Lunnquist, Rev. L. E. Jones, and Rev. C. A. Emeroy Johnson
No full textGroup Picture of: Rev, John Helmer Olson Rev. P. A. Fair Mr. Karl E. Mattson Rev Joseph E. Lunnquist Rev. L. E. Jones Rev. C. A. Emeroy Johnso
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