A graphical method of stream runoff prediction from LANDSAT derived snowcover data for watersheds in the upper Rio Grande Basin of Colorado

There are no author-identified significant results in this report

THE ECONOMIC VALUE OF HIKING: FURTHER CONSIDERATIONS OF OPPORTUNITY COST OF TIME IN RECREATIONAL DEMAND MODELS

The paper tests two alternative specifications for the opportunity cost of time in travel cost models. The standard travel cost survey design is enriched to include a contingent valuation type question about peoples' willingness to accept compensation to forgo a precisely defined recreational experience. It is hypothesized that individually revealed value of time more appropriately reflects the opportunity costs of time associated with a particular aspect of recreation than the wage rate which measures the trade-off between work and leisure generally. The results seem to indicate a better overall fit for the models with the elicited value of individual consumer's time than for the models with the more traditional hourly earnings (wage rates). The importance of the corrected measurement of the opportunity cost time is illustrated by showing that estimated consumer surpluses based on two different value of time measurements differ significantly.Recreation demand, Travel cost model, Value of time, Resource /Energy Economics and Policy,

High resolution vertical profiles of wind, temperature and humidity obtained by computer processing and digital filtering of radiosonde and radar tracking data from the ITCZ experiment of 1977

Results are presented from computer processing and digital filtering of radiosonde and radar tracking data obtained during the ITCZ experiment when coordinated measurements were taken daily over a 16 day period across the Panama Canal Zone. The temperature relative humidity and wind velocity profiles are discussed

LAND USE PLANNING AND POLICY IN THE SOUTH

Land Economics/Use,

Applications systems verification and transfer project. Volume 4: Operational applications of satellite snow cover observations. Colorado Field Test Center

The study was conducted on six watersheds ranging in size from 277 km to 3460 km in the Rio Grande and Arkansas River basins of southwestern Colorado. Six years of satellite data in the period 1973-78 were analyzed and snowcover maps prepared for all available image dates. Seven snowmapping techniques were explored; the photointerpretative method was selected as the most accurate. Three schemes to forecast snowmelt runoff employing satellite snowcover observations were investigated. They included a conceptual hydrologic model, a statistical model, and a graphical method. A reduction of 10% in the current average forecast error is estimated when snowcover data in snowmelt runoff forecasting is shown to be extremely promising. Inability to obtain repetitive coverage due to the 18 day cycle of LANDSAT, the occurrence of cloud cover and slow image delivery are obstacles to the immediate implementation of satellite derived snowcover in operational streamflow forecasting programs

Mode coupling and multiquantum vibrational excitations in Feshbach-resonant positron annihilation in molecules

The dominant mechanism of low-energy positron annihilation in polyatomic molecules is through positron capture in vibrational Feshbach resonances (VFR). In this paper we investigate theoretically the effect of anharmonic terms in the vibrational Hamiltonian on the positron annihilation rates. Such interactions enable positron capture in VFRs associated with multiquantum vibrational excitations, leading to enhanced annihilation. Mode coupling can also lead to faster depopulation of VFRs, thereby reducing their contribution to the annihlation rates. To analyze this complex picture, we use coupled-cluster methods to calculate the anharmonic vibrational spectra and dipole transition amplitudes for chloroform, chloroform-$d_1$, 1,1-dichloroethylene, and methanol, and use these data to compute positron resonant annihilation rates for these molecules. Theoretical predictions are compared with the annihilation rates measured as a function of incident positron energy. The results demonstrate the importance of mode coupling in both enhancement and suppression of the VFR. There is also experimental evidence for the direct excitation of multimode VFR. Their contribution is analyzed using a statistical approach, with an outlook towards more accurate treatment of this phenomenon.Comment: 16 pages, 10 figures, submitted to Phys. Rev.

Vibrational Feshbach Resonances Mediated by Nondipole Positron-Molecule Interactions

Measurements of energy-resolved positron-molecule annihilation show the existence of positron binding and vibrational Feshbach resonances. The existing theory describes this phenomenon successfully for the case of infrared-active vibrational modes which allow dipole coupling between the incident positron and the vibrational motion. Presented here are measurements of positron-molecule annihilation made using a recently developed cryogenic positron beam capable of significantly improved energy resolution. The results provide evidence of resonances associated with infrared-inactive vibrational modes, indicating that positron-molecule bound states may be populated by nondipole interactions. The anticipated ingredients for a theoretical description of such interactions are discussed.Comment: 5 pages, 2 figures, Phys. Rev. Lett. (in press

Developing criteria for the evaluation of the ICT contribution to social and economic development

Practitioners in Information and Communication Technology (ICT) for development have repeatedly relied on evaluations of past or present initiatives to advise and facilitate the design and implementation of other development initiatives. However, current quests for measures that demonstrate the developmental contribution of ICT call for new approaches to ICT4D evaluation. In response to this, the study presented in this paper provides a starting point in the development and evaluation of the appropriateness of a set of criteria – dimensions and indicators that can be applied to the appraisal of the ICT contribution to development. Development is defined as a multidimensional concept based on Sen’s capability approach, particularly focusing on the outputs (opportunities) and outcomes (benefits) ICT can enable within a given context. Indicators are proposed for education and research, healthcare, economic opportunities and political freedom dimensions. Findings obtained through exploratory survey research show that the proposed indicators are appropriate for the evaluation of the contribution of ICT to social and economic development, especially in a developing country context. Additional indicators were also proposed for some of the dimensions. Participants further reiterated the need to combine both qualitative and quantitative indicators to supplement and balance each other in the appraisal of development initiatives. Subsequent studies will seek to devise means of how this can be addressed, as well as a process through which a combined analysis can be obtained. Such studies should seek to extensively evaluate the indicators as well as apply them for the evaluation of ICT4D initiatives

Book Reviews

Understanding Biblical Theology: A Comparison of Theory and PracticeEdward W. Klink III and Darian R. Lockett Grand Rapids: Zondervan 2012, 193 pp. paper, $17.99 ISBN: 978-0310-49223-8Reviewed by Ruth Anne Reese Prepositions and Theology in the Greek New TestamentMurray J. Harris Grand Rapids: Zondervan 2012, 304 pp. cloth,$42.99 ISBN: 978-0310-49392-1 Reviewed by Dale F. Walker The New Testament: A Historical and Theological IntroductionDonald Alfred Hagner Grand Rapids: Baker Academic 2012, 896 pp. cloth, $49.99 ISBN: 978-0-8010-3931-7 Reviewed by Randall Hardman Contextualization in World Missions: Mapping and Assessing Evangelical ModelsA. Scott Moreau Grand Rapids: Kregel Publications 2012, 429 pp. paper,$28.99 ISBN: 978-0-8254-3389-4 Reviewed by Robert A. Danielson The Right Church: Live Like the First ChristiansCharles E. Gutenson Nashville: Abingdon Press 2012, 194 pp. paper, $14.99ISBN: 978-1-4267-4911-7Reviewed by Brian Yeich Interfaith Dialogue in PracticeDaniel S. Brown, Jr., ed. Kansas City: Rockhurst University Press 2012, 160 pp. paper,$30.00 ISBN: 978-1-886761-32-2 Reviewed by Robert A. Danielso