Genomic Sequence of a Ranavirus Isolated from Pike-Perch Sander lucioperca

The pike-perch iridovirus (PPIV) was isolated in Finland from apparently healthy pike-perch fingerlings during routine disease surveillance. Our phylogenomic analysis revealed that PPIV is the first fish member of a clade of ranaviruses previously described from European and Chinese amphibians

Kudzu, Pueraria Montana (Lour.) Merr. Abundance and Distribution in Oklahoma

Invasive species are a growing problem in the United States, and kudzu (Pueraria montana) (Lour.) Merr. is one of the most well documented invaders of southeastern states. Documenting the invasion of kudzu in Oklahoma, however, has not been a targeted focus in previous studies; thus, maps of its occurrence differ among sources. Our primary objective was to locate and confirm the presence of kudzu throughout Oklahoma. Specifically, we attempted to confirm previously recorded populations of kudzu and estimate the extent of the invasion at those sites. In addition, we wanted to locate stands of kudzu within Oklahoma that had not been recorded and to assess the extent of invasion. A survey was sent to state and county officials to acquire information on locations and general knowledge of kudzu. Points of occurrence and estimated extent of invasion in hectares were then placed in ArcMap programming to create a consolidated map of kudzu. Samples were collected, pressed, and placed in the University of Oklahoma’s Bebb Herbarium (OKL). We determined the majority of kudzu locations are in the southeastern portion of the state and total a minimum of 32.4 hectares. Results of the survey indicated half of the respondents polled were unaware of kudzu’s presence in the state

Asymptotic channels and gauge transformations of the time-dependent Dirac equation for extremely relativistic heavy-ion collisions

We discuss the two-center, time-dependent Dirac equation describing the dynamics of an electron during a peripheral, relativistic heavy-ion collision at extreme energies. We derive a factored form, which is exact in the high-energy limit, for the asymptotic channel solutions of the Dirac equation, and elucidate their close connection with gauge transformations which transform the dynamics into a representation in which the interaction between the electron and a distant ion is of short range. We describe the implications of this relationship for solving the time-dependent Dirac equation for extremely relativistic collisions.Comment: 12 pages, RevTeX, 2 figures, submitted to PR

Rotational Characterization of TESS Stars with Deep Learning

Ph.D

The Asymptotic distribution of circles in the orbits of Kleinian groups

Let P be a locally finite circle packing in the plane invariant under a non-elementary Kleinian group Gamma and with finitely many Gamma-orbits. When Gamma is geometrically finite, we construct an explicit Borel measure on the plane which describes the asymptotic distribution of small circles in P, assuming that either the critical exponent of Gamma is strictly bigger than 1 or P does not contain an infinite bouquet of tangent circles glued at a parabolic fixed point of Gamma. Our construction also works for P invariant under a geometrically infinite group Gamma, provided Gamma admits a finite Bowen-Margulis-Sullivan measure and the Gamma-skinning size of P is finite. Some concrete circle packings to which our result applies include Apollonian circle packings, Sierpinski curves, Schottky dances, etc.Comment: 31 pages, 8 figures. Final version. To appear in Inventiones Mat

Characterization of Titanium Alloys Produced by Electron Beam Directed Energy Deposition

Functionally graded materials offer the potential to improve structural efficiency by allowing the material composition and/or microstructural features to spatially vary within a component. Additive manufacturing techniques enable the fabrication of such graded materials and structures. While examining several titanium alloys, this paper focuses on Ti-8Al-1Er as it has a unique microstructure that is only feasible when produced by rapid solidification methods like electron beam directed energy deposition, an additive manufacturing process. The results show that, when mixed, Ti-8Al-1Er and commercially-pure titanium uniformly mix at various ratios and the resultant static tensile properties of the mixed alloys behave according to rule-of-mixtures. At discontinuous interfaces between Ti-8Al-1Er and commercially-pure titanium, the crack growth behavior progresses smoothly across the discontinuity as the crack transitions from one crack growth regime into another. Studies on monolithic samples shows the mechanisms of damage in the Ti-8Al-1Er; specifically, that strain localization occurs near grain boundaries of high mis-orientation on the microscale and that twinning and dislocation density is concentrated near erbia-strengthening particles (Er2O3) on the nanoscale

Critical Review of Theoretical Models for Anomalous Effects (Cold Fusion) in Deuterated Metals

We briefly summarize the reported anomalous effects in deuterated metals at ambient temperature, commonly known as "Cold Fusion" (CF), with an emphasis on important experiments as well as the theoretical basis for the opposition to interpreting them as cold fusion. Then we critically examine more than 25 theoretical models for CF, including unusual nuclear and exotic chemical hypotheses. We conclude that they do not explain the data.Comment: 51 pages, 4 Figure

Kudzu, Pueraria Montana (Lour.) Merr. Abundance and Distribution in Oklahoma

Invasive species are a growing problem in the United States, and kudzu (Pueraria montana) (Lour.) Merr. is one of the most well documented invaders of southeastern states. Documenting the invasion of kudzu in Oklahoma, however, has not been a targeted focus in previous studies; thus, maps of its occurrence differ among sources. Our primary objective was to locate and confirm the presence of kudzu throughout Oklahoma. Specifically, we attempted to confirm previously recorded populations of kudzu and estimate the extent of the invasion at those sites. In addition, we wanted to locate stands of kudzu within Oklahoma that had not been recorded and to assess the extent of invasion. A survey was sent to state and county officials to acquire information on locations and general knowledge of kudzu. Points of occurrence and estimated extent of invasion in hectares were then placed in ArcMap programming to create a consolidated map of kudzu. Samples were collected, pressed, and placed in the University of Oklahoma’s Bebb Herbarium (OKL). We determined the majority of kudzu locations are in the southeastern portion of the state and total a minimum of 32.4 hectares. Results of the survey indicated half of the respondents polled were unaware of kudzu’s presence in the state

Get the Most From Your Cotton Stamps.

12 p

Acoustic wave studies during fast ion beam interactions with solds

Ion beam material modification is currently being used for several important technological applications such as semiconductor doping [1], surface modification of metals [2], cold etching [1], micro machining [1] and material analysis [3]. Ion beam processing has many advantages [4]. The speed, homogeneity and reproducibility of the doping process are easily controlled. Tight control of the number of doping atoms is possible. Low purity dopants can be used. The target can be kept at low temperatures allowing for low melting temperature materials to be modified. Simple masking methods can be employed and doping can be performed through passive films. Low penetration depths can be achieved and multiple implantations can produce varied doping profiles. Devices with small dimensions can be manufactured due to the small size of the ion beam. Since ion implantation is not an equilibrium process, equilibrium solubility limits of the ion species in the target material can be exceeded. There are some disadvantages of this type of doping process. Damage is caused to the crystal structure creating defects. Implantation is limited to near-surface regions and theoretical profiles can be difficult to obtain due to effects of channeling and diffusion [5]