Convective Babcock-Leighton Dynamo Models

We present the first global, three-dimensional simulations of solar/stellar convection that take into account the influence of magnetic flux emergence by means of the Babcock-Leighton (BL) mechanism. We have shown that the inclusion of a BL poloidal source term in a convection simulation can promote cyclic activity in an otherwise steady dynamo. Some cycle properties are reminiscent of solar observations, such as the equatorward propagation of toroidal flux near the base of the convection zone. However, the cycle period in this young sun (rotating three times faster than the solar rate) is very short ($\sim$ 6 months) and it is unclear whether much longer cycles may be achieved within this modeling framework, given the high efficiency of field generation and transport by the convection. Even so, the incorporation of mean-field parameterizations in 3D convection simulations to account for elusive processes such as flux emergence may well prove useful in the future modeling of solar and stellar activity cycles.Comment: 5 pages, 4 figures, submitted to the Astrophysical Journal Letter

The First Ten Years

The First Ten Years written by ESF Dean Nelson Brown gives an overview of the American forestry education from the late 1800’s to the early 1900’s and provides in depth information on the challenges and final formation and establishment of the State College of Forestry. Historical and very detailed information is given on the first board of trustees, the first dean of New York State College of Forestry, Dean Hugh Potter Baker, the first faculty of the college, and the formation of departments. Along with discussing the people, buildings and property of the main campus, the manuscript gives details on the early forest properties including the Ranger School and the Lafayette Road Experiment Station. The manuscript discusses the formation of student clubs and student publications including the Empire Forester and the Camp Log and discusses the impact of World War I on the student body, the faculty and the campus. Many students and some faculty including Dean Baker entered into military service during their time at the New York State College of Forestry. The First Ten Years covers much more than 10 years, starting with the history of forestry education in 1898 and ending with information about the college in the 1950’s

Relationship Between Teachers\u27 Concerns Toward Data Meetings and Student Achievement

Schools that employ data-driven instructional techniques and policies also tend to employ data meetings, in which teachers and other stakeholders exchange ideas, form agendas, and otherwise, apply data-derived insights that result in pedagogical action. The problem investigated in this study was that the local district has not yet measured the effectiveness of these data meetings. The purpose of this correlational study was to measure the relationship between teachers\u27 concerns about data meetings and students\u27 performance in math as measured by the change scores on the Standardized Test for the Assessment of Reading (STAR) test in a North Alabama school. The theoretical framework was Astin\u27s student engagement theory, which hypothesizes that students\u27 academic improvements are caused by a link between higher levels of teacher concern related to key aspects of pedagogy and student engagement. A linear regression was conducted to measure the relationship between the concerns of 53 teachers regarding data meetings and the change scores of their students on the STAR math test from one year to the next. The results indicated a significant (p \u3c .05) positive correlation between teachers\u27 concerns about data meetings and STAR math test scores, with variation in readiness associated with 68% of variation in math scores. Therefore, more attention should be paid to increasing teachers\u27 concerns toward data meetings. Doing so can produce positive change for students who, because of improved math outcomes, will do better in school and in the employment market

Buoyant Magnetic Loops in a Global Dynamo Simulation of a Young Sun

The current dynamo paradigm for the Sun and sun-like stars places the generation site for strong toroidal magnetic structures deep in the solar interior. Sunspots and star-spots on sun-like stars are believed to arise when sections of these magnetic structures become buoyantly unstable and rise from the deep interior to the photosphere. Here we present the first 3-D global magnetohydrodynamic (MHD) simulation in which turbulent convection, stratification, and rotation combine to yield a dynamo that self-consistently generates buoyant magnetic loops. We simulate stellar convection and dynamo action in a spherical shell with solar stratification, but rotating three times faster than the current solar rate. Strong wreaths of toroidal magnetic field are realized by dynamo action in the convection zone. By turning to a dynamic Smagorinsky model for subgrid-scale turbulence, we here attain considerably reduced diffusion in our simulation. This permits the regions of strongest magnetic field in these wreaths to rise toward the top of the convection zone via a combination of magnetic buoyancy instabilities and advection by convective giant cells. Such a global simulation yielding buoyant loops represents a significant step forward in combining numerical models of dynamo action and flux emergence.Comment: 6 pages, 3 figures, accepted in ApJ Letter

President Roosevelt and His Contributions to American Forestry

President Roosevelt’s contributions to the upbuilding and development of American forestry will probably be accurately measured only in retrospect. After he has been out of office for a number of years, 10 to 20 perhaps, we shall be able to appraise much more fairly and adequately his part in the development of American conservation. In the same way Lincoln was not understood or appreciated, neither during his term of office as President nor in the immediate succeeding years

Life science payloads planning study integration facility survey results

The integration facility survey effort described is structured to examine the facility resources needed to conduct life science payload (LSP) integration checkout activities at NASA-JSC. The LSP integration facility operations and functions are defined along with the LSP requirements for facility design. A description of available JSC life science facilities is presented and a comparison of accommodations versus requirements is reported

Impressions of German Utilization

To an American forester, accustomed to our extensive practice of forestry and our rough methods of utilization, the closeness with which the Europeans utilize the products of the forest is truly a revelation

Addressing Elder Abuse and Neglect: Prevalence of Elder Abuse Records for Medicare/Medicaid Residents in Nursing Homes or Community Settings

Abuse and neglect of the elderly constitute a violation of the individual’s personal rights, and often have lasting and detrimental effects. Annually, approximately 1-2 million elderly individuals are victims of maltreatment, and these individuals are three times more likely to die than those individuals who are not victims of abuse or neglect (Glauser & Pfeiffer, 2015). This public health problem is of great concern to clinicians and administrators who are responsible for care of the elderly. However, the burden of elder abuse and neglect is difficult to calculate and track because abuse and neglect in this population often go unreported (Saylor, 2016)