3,365 research outputs found
Recommended from our members
Rebuttal of Roper (2020) Critique of Larson et al. (2019)
No full textRoper (2020) conducted a critique of the Larson et al. (2019) study of the accuracy and confidence of data collected using systematic and random sampling designs. Roper (2020) did not provide a data set but speculated that the Larson et al. (2019) conclusions likely reflected differences in the number of plants evaluated at each plot and the low number of independent observers rather than the sample design. Our random sampling design employed multiple randomly located quadrat locations and measured multiple plants (> 5) that were averaged within the plot to represent plot characteristics. Data collected in this fashion fulfilled assumptions intrinsic to and necessary for statistical analysis using plot data as observations. Thus, the statistical observations reported in the original paper are valid. © 2020 The Society for Range ManagementThe Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information
Recommended from our members
Stability of Water Temperature Attributes Over a 20-Yr Period
No full textThe objective of this study was to determine if the stability of water temperature attributes suggested by an analysis conducted in 2003 (Larson and Larson 2001; 2003) was continued over a 20-yr period. The pattern of degree accumulations observed in the daily heating and cooling cycles of three streams in 1998, 2013, 2014, 2016, and 2018 were studied in Grant County, Oregon. The average air and water temperatures remained stable at each site and followed the expected natural patterns (Larson and Larson 2001) described in an earlier study. Within each sampling year, mean air and water temperature remained within 1−2°C and there were no significant differences between the rates of heating between the study years or between sites. © 2020 The Society for Range ManagementThe Rangeland Ecology & Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information
Simple drag prediction strategies for an Autonomous Underwater Vehicle’s hull shape
No full textThe range of an AUV is dictated by its finite energy source and minimising the energy consumption is required to maximise its endurance. One option to extend the endurance is by obtaining the optimum hydrodynamic hull shape with balancing the trade-off between computational cost and fluid dynamic fidelity. An AUV hull form has been optimised to obtain low resistance hull. Hydrodynamic optimisation of hull form has been carried out by employing five parametric geometry models with a streamlined constraint. Three Genetic Algorithm optimisation procedures are applied by three simple drag predictions which are based on the potential flow method. The results highlight the effectiveness of considering the proposed hull shape optimisation procedure for the early stage of AUV hull desig
Recommended from our members
Comment: "Perspectives on water flow and the interpretations of FLIR images" J. Range Manage. 55:106-111 2002
No full textReply by S.L. Larson, L.L. Larson, and P.A. Larson, p. 100-101.The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform August 202
THE CORRELATION OF THE MEDIEVAL EUROPEAN STATE AND LAW IN THE DOCTRINE OF P.A. KROPOTKIN
No full textThe actual task of Russian state studies and jurisprudence remains the opposition to the ideological and theoretical constructions of Russian classical anarchism. Purpose: to establish the most significant features and disadvantages of P.A. Kropotkin’s interpretation of the correlation of state and law on the example of Medieval Europe. When writing the article, the author applies interdisciplinary and class approaches. General scientific and specific scientific methods are used: historical, problem-theoretical, formal-logical, textual. Materials: monuments of law, other historical sources, foreign and national historiography. The analysis shows that P.A. Kropotkin’s works are characterised not only by a pronounced anti-exploitation pathos, but also by an equally pronounced tendentiousness. Results: aprioriism, anti-statism and antilegism, radical localism, Eurocentrism, diffusionism, cyclism and catastrophism, clothed in the form of postulates, predetermined P.A. Kropotkin’s one-sided interpretations of the interaction of the medieval European state with positive and customary law. In the first case, it took a purely causative form, and in the second, it was predominantly conflictual. These are the key flaws of P.A. Kropotkin’s correlation concept
Commodity risk management and development
No full textIn 1995, 57 countries depended on three commodities for more than half their exports, reports UNCTAD. And commodities, fuels, grains, and oilseeds are important imports for several countries. The notorious volatility of commodity prices is a major source of instability and uncertainty in commodity-dependent countries, affecting governments, producers (farmers), traders, processors, and financial institutions. Further, commodity price instability has a negative impact on economic growth, income distribution, and poverty alleviation. Early attempts to deal with commodity price volatility relied on buffer stocks, buffer funds, government intervention in commodity markets, and international commodity agreements to stabilize prices. These were largely unsuccessful--sometimes spectacularly so. Buffer funds went bankrupt, commodity agreements were suspended, buffer stocks proved ineffective, and government intervention was both costlyand ineffective. As the poor performance of such stabilization schemes became more evident, academics and policymakers began distinguishing between programs that tried to alter price distribution (domestically or internationally) and programs that used market-based approaches for dealing with market uncertainty. This change in approach coincided with a significant rise in the use of market-based commodity risk management instruments--aided by the liberalization of markets, the lowering of trade and capital control barriers, and the globalization of commodity markets. by the mid-1990s, several governments, state companies, and private sector participants began using commodity derivatives markets to hedge their commodity price risks. Participation in those markets is growing, but important barriers to access remain including counterparty risk, problems small groups (such as farmers) have aggregating risks, basis risks (no correlation of local and international prices), no local reference prices, low liquidity, no derivatives markets for certain products, and low levels of know-how. International institutions, local governments, and the private sector could facilitate developing countries access to derivatives markets and the use of risk management tools to solve public sector problems.Economic Theory&Research,Payment Systems&Infrastructure,Environmental Economics&Policies,Markets and Market Access,Labor Policies,Health Economics&Finance,Insurance&Risk Mitigation,Environmental Economics&Policies,Access to Markets,Markets and Market Access
Flow-induced gate vibrations: Prevention of sef-excitation computation of dynamic gate behaviour and the use of models
No full textThe objective of this study is to develop design criteria for the dynamic behaviour of gates and valves. To this end, a resume of existing theories is given as well as an extended analysis of the added water mass, hydrodynamic rigidity and damping (also negative damping or self-excitation) and excitation by turbulent flow. New computation methods are presented for self-exciting vibrations: The ensuing introduction of an instability indicator permits the prediction of such vibrations in the design phase. Methods are described to calculate the added water mass and water damping in flowing water. Also treated are the instability of overflowing and falling water nappes, the response of a mass-spring system to noise excitation by turbulence, and the technique of hydroelastic models. Prior publications by the author on these subjects are to be found in the Appendices.Hydraulic EngineeringCivil Engineering and Geoscience
Quality and qualities of design studies, design research and design
No full textGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Methodologie en Organisatie van Desig
Views of P.A. Krushevan on the National Problem in Russia: Moldavian or Russian Nationalist
No full textThe article deals with the national identity of P.A. Krushevan. Being of Moldavian nationality, he was a Russian conservative writer and journalist. At the beginning of the 19th century he served as a Russian nationalist in the political arena. The author shows that he was a supporter of Moldavian national traditions and a personality of the Moldavian national movement. At the same time Krushevan was an «imperial nationalist» and a Russian statesman. In behalf of Bessarabia peasants, he exposed the economic activity of «plutocracy», but he was a stranger to domestic anti-Semitism
- …
