Resurgence in the bi-Yang-Baxter model

We study the integrable bi-Yang-Baxter deformation of the SU(2) principal chiral model (PCM) and its finite action uniton solutions. Under an adiabatic compactification on an S1 , we obtain a quantum mechanics with an elliptic Lamé-like potential.We perform a perturbative calculation of the ground state energy in this quantum mechanics to large orders obtaining an asymptotic series. Using the Borel-Padé technique, we determine the expected locations of branch cuts in the Borel plane of the perturbative series and show that they match the values of the uniton actions. Therefore, we can match the non-perturbative contributions to the energy with the uniton solutions which fractionate upon adiabatic compactification.An off-shoot of the WKB analysis, is to identify the quadratic differential of this deformed PCM with that of an N=2 Seiberg-Witten theory. This can be done either as an Nf=4 SU(2) theory or as an elliptic quiver SU(2) x SU(2) theory. The mass parameters of the gauge theory are given by the deformation parameters of the PCM

Yield Response and N-fertilizer recovery of rainfed wheat growing in the Mediterranean region

Yield response and isotopic N-fertilizer recovery of rainfed wheat were assessed as influenced by fertilizer rate and timing. A popular bread wheat cultivar, Seri 82, was planted in a 4-year experiment from 1994/1995 to 1997/1998. Urea fertilizer was applied at rates of 0-240 N ha-1 in two split applications. Fertilizer-N recovery and residual N remaining in the soil after wheat harvest were measured using 15N-labelled fertilizers. The highest wheat grain yield ranged from 4.9 to 6.9 t ha-1 with 240 kg N ha-1 fertilizer. The 4-year results showed that wheat benefited least from the fertilizer applied near planting. N-fertilizer recovery was higher from fertilizer applied during tillering compared with application at emergence. The results suggest that applying one-third or less of the total N at planting and applying the remained at tillering can minimize leaching risks. Another befit of this strategy would be an overall increase in N-fertilizer recovery. Residual fertilizer-N left in soil after wheat harvest was proportional to N application rates and mainly confined t the upper 40 cm depth. 15N recovery by wheat at maturity was 50-60%, indicating that 40-50% of fertilizer-N remained in the soil or was lost. Over 95% of total fertilizer application to wheat could be accounted for in the wheat crop or soil after harvest at the 240 kg N ha-1 rate. The results, therefore, suggest that leaching losses of fertilizer-N below 90 cm were not likely during the growing season for rainfed what grown on these heavy-textured soils (Palexerollic Chromoxeret) of the Mediterranean region

The effect of Telfast® 180 on driver behaviour, decision-making and reaction time.

The principal objective of the study was to examine the effect of Telfast® 180, an antihistamine, on driver behaviour, decision-making, and reaction time. A sample of 255 volunteers participated in the study. The sample was randomly divided into two groups, viz. a placebo and a Telfast group. One of the groups received Telfast and the other a placebo. Initially all the participants were given a standardised driving test, as well as a psychomotor test. Immediately thereafter the placebo group received their placebo tablets and the Telfast group their Telfast tablets. Exactly 2,6 hours later every participant was tested again, using the same tests as before. No statistically significant differences were found between the Placebo group and the Telfast group. No sedative effects due to Telfast® 180 were thus evident

Minutes of the Classis of Holland

Albertus C. Van Raalte informed the Classis of Holland on April 29, 1852, that he had received a letter from the Rev. J. J. Schepers written on February 18 which requests that the Classis install Schepers as pastor of the congregation. However, the congregation does not promise to unite with the Albany denomination. But Van Raalte and the Classis feel that this congregation had no right to leave the congregation in Graafschap and without authorization appointed Schepers as pastor.https://digitalcommons.hope.edu/vrp_1850s/1223/thumbnail.jp

The Staudinger Ligation

While the Staudinger reaction has first been described a hundred years ago in 1919, the ligation reaction became one of the most important and efficient bioconjugation techniques in the 1990s and this century. It holds the crucial characteristics for bioorthogonal chemistry: biocompatibility, selectivity, and a rapid and high-yielding turnover for a wide variety of applications. In the past years, it has been used especially in chemical biology for peptide/protein synthesis, posttranslational modifications, and DNA labeling. Furthermore, it can be used for cell-surface engineering, development of microarrays, and drug delivery systems. However, it is also possible to use the reaction in synthetic chemistry for general formation of amide bonds. In this review, the three major types, traceless and nontraceless Staudinger Ligation as well as the Staudinger phosphite reaction, are described in detail. We will further illustrate each reaction mechanism and describe characteristic substrates, intermediates, and products. In addition, not only its advantages but also stereochemical aspects, scope, and limitations, in particular side reactions, are discussed. Finally, the method is compared to other bioorthogonal labeling methods

The impact of corporate philanthropy on reputation for corporate social performance

This study seeks to examine the mechanisms by which a corporation’s use of philanthropy affects its reputation for corporate social performance (CSP), which the authors conceive of as consisting of two dimensions: CSP awareness and CSP perception. Using signal detection theory (SDT), the authors model signal amplitude (the amount contributed), dispersion (number of areas supported), and consistency (presence of a corporate foundation) on CSP awareness and perception. Overall, this study finds that characteristics of firms' portfolio of philanthropic activities are a greater predictor of CSP awareness than of CSP perception. Awareness increases with signal amplitude, dispersion, and consistency. CSP perception is driven by awareness and corporate reputation. The authors’ contention that corporate philanthropy is a complex variable is upheld, as we find that CSP signal characteristics influence CSP awareness and perception independently and asymmetrically. The authors conclude by proposing avenues for future research