Research Note, January 1968

This is issue 6: Fertilization in Western Larch Forestshttps://scholarworks.umt.edu/montana_forestry_notes/1005/thumbnail.jp

Visual Diagnosis of Mineral Deficiency in Western Larch

Paper published as Bulletin 34 in the UM Bulletin Forestry Series.https://scholarworks.umt.edu/umforestrybulletin/1018/thumbnail.jp

Rapid Wet Ash Digestion of Coniferous Foliage for Analysis of Potassium, Phosphorus, Calcium and Magnesium

Paper published as Bulletin 39 in the UM Bulletin Forestry Series.https://scholarworks.umt.edu/umforestrybulletin/1023/thumbnail.jp

Interview of Edward Koronkiewicz, F.S.C.

Edward Koronkiewicz was born in 1954 in Southwest Philadelphia, PA. He lived in St. Mary of Czestochowa Parish where he also attended elementary school. He graduated from West Philadelphia Catholic High School for Boys in 1972. After a year as an Aspirant, he joined the Christian Brothers and received his habit in July 1973. He graduated from La Salle College with a B.A. in Secondary Education/Social Studies in 1976 and later earned a Master’s in Educational Administration at Villanova University. He has taught Social Studies at Bishop Walsh High School in Cumberland, MD, Archbishop Carroll High School in Radnor, PA, and West Philadelphia Catholic High School. He was also the Disciplinarian and later, Vice-Principal at Archbishop Carroll where he led the transition of the school from co-institutional to co-educational. Before he came to La Salle he spent twelve years at West Catholic. The first year he served as Vice Principal of the Boys School and managed the merger of West Catholic Boys and West Catholic Girls into one school. When the schools were joined he became the Assistant Principal for Academic Affairs. In June 2000, he became the Associate Registrar at La Salle University and remains in that post today. In his free time Brother Ed enjoys cooking, walking, reading, spending time with family, and relaxing at the Christian Brothers house in Ocean City, NJ

Trees or Trotters?

A real options model is used to explain why Irish farmers have been slow to switch from traditional farming to forestry despite numerous government incentives. In the theoretical model our results depend on profits from traditional farming relative to forestry. Under reasonable parameterisations of this profit ratio we show that it is optimal for farmers to stay in farming for six years before switching to forestry. In a subsequent empirical dynamic panel data model, the error correction model also predicts that it would take about six years for a change in the profit ratio to fully affect the number of hectares planted

Cannabis-dependent adolescents show differences in global reward-associated network topology: A functional connectomics approach.

Adolescence may be a period of increased vulnerability to the onset of drug misuse and addiction due to changes in developing brain networks that support cognitive and reward processing. Cannabis is a widely misused illicit drug in adolescence which can lead to dependence and alterations in reward-related neural functioning. Concerns exist that cannabis-related alterations in these reward networks in adolescence may sensitize behaviour towards all forms of reward that increase the risk of further drug use. Taking a functional connectomics approach, we compared an acutely abstinent adolescent cannabis-dependent (CAN) group with adolescent controls (CON) on global measures of network topology associated with anticipation on a monetary incentive delay task. In the presence of overall superior accuracy, the CAN group exhibited superior global connectivity (clustering coefficient, efficiency, characteristic path length) during monetary gain anticipation compared with the CON group. Additional analyses showed that the CAN group exhibited significantly greater connectivity strength during monetary gain anticipation across a subnetwork that included mesocorticolimbic nodes involving both interhemispheric and intrahemispheric connections. We discuss how these differences in reward-associated connectivity may allude to subtle functional alterations in network architecture in adolescent cannabis-dependence that could enhance the motivation for nondrug reward during acute abstinence

Carrier-induced ferromagnetism in n-type ZnMnAlO and ZnCoAlO thin films at room temperature

The realization of semiconductors that are ferromagnetic above room temperature will potentially lead to a new generation of spintronic devices with revolutionary electrical and optical properties. Transition temperatures in doped ZnO are high but, particularly for Mn doping, the reported moments have been small. We show that by careful control of both oxygen deficiency and aluminium doping the ferromagnetic moments measured at room temperature in n-type ZnMnO and ZnCoO are close to the ideal values of 5mB and 3mB respectively. Furthermore a clear correlation between the magnetisation per transition metal ion and the ratio of the number of carriers to the number of transition metal donors was established as is expected for carrier induced ferromagnetism for both the Mn and Co doped films. The dependence of the magnetisation on carrier density is similar to that predicted for the transition temperature for a dilute magnetic semiconductor in which the exchange between the transition metal ions is through the free carriers.Comment: 14 pages pd

Spin polarized transport current in n-type co-doped ZnO thin films measured by Andreev spectroscopy

We use point contact Andreev reflection measurements to determine the spin polarization of the transport current in pulse laser deposited thin films of ZnO with 1% Al and with and without 2%Mn. Only films with Mn are ferromagnetic and show spin polarization of the transport current of up to 55 $\pm$ 0.5% at 4.2 K, in sharp contrast to measurements of the nonmagnetic films without Mn where the polarization is consistent with zero. Our results imply strongly that ferromagnetism in these Al doped ZnO films requires the presence of Mn.Comment: Published versio