Paul Bunyan and His Blue Ox, Babe

American mythology has no epic hero whose deeds and achievements can in any way compare with the exploits of the great Paul Bunyan, the patron saint of the foresters. His fame rests secure in the tales of the thousands of leather-throated lumberjacks who worked under the great Paul during the bonanza days of the great forests

PAUL BUNYON

The hush of evening quieted the restless waters of Pelican lake. The sweetly melancholy song of the Hermit Thrush far away in the deep green of pine and balsam. drifted faintly across the rice covered bay announcing the angelus hour of the forest. I ceased my paddling and sat in silent reverence gazing on the flaming crimson of the western sky which silhouetted the slender cathedral spires of the spruces. Suddenly a loud halloo disturbed my reverie and turning quickly I say a grizzled man of enormous stature standing on the rocky shore

Nonstationary lterated Tikhonov Regularization

A convergence rate is established for nonstationary iterated Tikhonov regularization, applied to ill-posed problems involving closed, densely defined linear operators, under general conditions on the iteration parameters. lt is also shown that an order-optimal accuracy is attained when a certain a posteriori stopping rule is used to determine the iteration number

In Search of Humble Leaders

The significance of moderation and balance across various domains has been sanctioned for millennia and deviations from midpoints of virtues, traits, qualities, and other attributes have been described as dysfunctional suggesting a nonmonotonic, U-shaped curve. Modern scholarship and lay interpretations of the virtue of humility have neglected this perspective and appear to tacitly assume that humility is an unmitigated good that leaders should develop and that more is better. Here we show, however, that what we refer to as authentic humility, is positioned at an intermediate point between negative and positive views of the self and that deviations from this center adversely impact well-being and offer a nonlinear, inverted U-shaped curve. Such an interpretation reconciles views of humility as a weakness or strength and demonstrates its positive impact on self, followers, and organizational well-being. We conclude by suggesting that humility has costs for leaders and therefore not an unmitigated good.&nbsp

Sweat the Small Stuff, How Small Incidents of Negative Workplace Behavior Lead to Larger Misconduct

Small losses, measurable incremental negative workplace behaviors that do not align with organizational and societal norms often trigger a dynamic, magnifying process that produces greater undesirable outcomes, which once started, can often result in a downward spiral. Quickly addressing small problems can prevent minor misconduct and wrongdoing from escalating into greater difficulties later that can appear unstoppable. Failure to tackle the small issues and big problems will often follow. Managers should celebrate small victories or wins but also need to address small losses. Just as small wins can result in significant organizational gains, small losses can result in business losses

Functional Methods in Stochastic Systems

Field-theoretic construction of functional representations of solutions of stochastic differential equations and master equations is reviewed. A generic expression for the generating function of Green functions of stochastic systems is put forward. Relation of ambiguities in stochastic differential equations and in the functional representations is discussed. Ordinary differential equations for expectation values and correlation functions are inferred with the aid of a variational approach.Comment: Plenary talk presented at Mathematical Modeling and Computational Science. International Conference, MMCP 2011, Star\'a Lesn\'a, Slovakia, July 4-8, 201

Sensitivity for reverse-phi motion

AbstractLow-level contrast information in the primary visual pathway is represented in two different channels. ON-center cells signal positive contrasts and OFF-center cells signal negative contrasts. In this study we address the question whether initial motion analysis is performed separately in these two channels, or also through combination of signals from ON and OFF cells. We quantitatively compared motion coherence detection for regular and for reverse-phi motion stimuli. In reverse-phi motion the contrast of a pattern flips during displacements. Sensitivity is therefore based on correlating positive and negative contrasts, whereas for regular motion it is based on correlating similar contrasts. We compared tuning curves for step size and temporal interval for stimuli in which motion information was limited to a single combination of step size and interval. Tuning for step size and temporal interval was highly similar for the two types of motion. Moreover, minimal coherence thresholds for both types of motion matched quantitatively, irrespective of dot density. We also measured sensitivity for so-called no-phi motion stimuli, in which the contrast of displaced dots was set to zero. Sensitivity for no-phi motion was low for stimuli containing only black or only white dots. When both dot polarities were present in the stimulus, sensitivity was absent. Thus, motion information based on separate contrasts was effectively cancelled by a component based on different contrasts. Together these results show equal efficiency in correlating dots of opposite contrast and of similar contrast, which strongly suggests efficient detection of correlations across ON and OFF channels

Two-level Hamiltonian of a superconducting quantum point contact

In a superconducting quantum point contact, dynamics of the superconducting phase is coupled to the transitions between the subgap states. We compute this coupling and derive the two-level Hamiltonian of the contact.Comment: REVTeX, 5 pages, reference adde

The quantitative soil pit method for measuring belowground carbon and nitrogen stocks

Many important questions in ecosystem science require estimates of stocks of soil C and nutrients. Quantitative soil pits provide direct measurements of total soil mass and elemental content in depth-based samples representative of large volumes, bypassing potential errors associated with independently measuring soil bulk density, rock volume, and elemental concentrations. The method also allows relatively unbiased sampling of other belowground C and nutrient stocks, including roots, coarse organic fragments, and rocks. We present a comprehensive methodology for sampling these pools with quantitative pits and assess their accuracy, precision, effort, and sampling intensity as compared to other methods. At 14 forested sites in New Hampshire, nonsoil belowground pools (which other methods may omit, double-count, or undercount) accounted for upward of 25% of total belowground C and N stocks: coarse material accounted for 4 and 1% of C and N in the O horizon; roots were 11 and 4% of C and N in the O horizon and 10 and 3% of C and N in the B horizon; and soil adhering to rocks represented 5% of total B-horizon C and N. The top 50 cm of the C horizon contained the equivalent of 17% of B-horizon carbon and N. Sampling procedures should be carefully designed to avoid treating these important pools inconsistently. Quantitative soil pits have fewer sources of systematic error than coring methods; the main disadvantage is that because they are time-consuming and create a larger zone of disturbance, fewer observations can be made than with cores