Application of wheat yield model to United States and India

The author has identified the following significant results. The wheat yield model was applied to the major wheat-growing areas of the US and India. In the US Great Plains, estimates from the winter and spring wheat models agreed closely with USDA-SRS values in years with the lowest yields, but underestimated in years with the highest yields. Application to the Eastern Plains and Northwest indicated the importance of cultural factors, as well as meteorological ones in the model. It also demonstrated that the model could be used, in conjunction with USDA-SRRS estimates, to estimate yield losses due to factors not included in the model, particularly diseases and freezes. A fixed crop calendar for India was built from a limited amount of available plot data from that country. Application of the yield model gave measurable evidence that yield variation from state to state was due to different mixes of levels of meteorological and cultural factors

Packaging a cultural landscape : a case study of the Papahanaumokuakea world heritage nomination

This thesis research explores the representation, inclusion, and exclusion of Native Hawaiians in the nomination of the Papahanaumokuakea World Heritage Cultural Landscape in Hawai'i, the only cultural landscape and mixed World Heritage site in the United States. Archival research and textual analysis methods are employed in this study to examine how goals of creating the Cultural Landscape category in 1992 are reflected in the nomination documents for this site, thus contributing to discussions of Indigenous rights, the human-environment relationship, and the local-global nexus that characterizes UNESCO World Heritage sites. This study concludes that although many efforts to include Native Hawaiians in the nomination and management of this site are evident in the nomination dossier, pre-existing institutional and management structures focused on natural resource conservation, a value of pristine nature, and representation of Native Hawaiians as a homogeneous group join the NaKoa IkaIka KaLahui Hawaii and Koani Foundation's objection to the site's nomination in challenging the idea that the nomination process was completely inclusive. This research contributes to World Heritage and heritage studies literature as well as geography, exploring the nature-culture relationship and the influence of the Sauerian cultural landscape approach on the textual representation of cultural landscape in the World Heritage context

Legal Malpractice—Expansion of the Standard of Care: Duty to Refer—Horne v. Peckham, 97 Cal. App. 3d 404, 158 Cal. Rptr. 714 (1979)

This note analyzes the Home court\u27s reasoning in expanding the standard of care in legal malpractice actions to include a duty to refer and in holding attorneys to the same standard of care as physicians. This note also evaluates the considerations relevant to distinguishing specialist cases from generalist cases and the need for expert testimony in determining liability for failure to refer

Unusual magnetic-field dependence of partially frustrated triangular ordering in manganese tricyanomethanide

Manganese tricyanomethanide, Mn[C(CN)3]2, consists of two interpenetrating three-dimensional rutile-like networks. In each network, the tridentate C(CN)3- anion gives rise to superexchange interactions between the Mn2+ ions (S=5/2) that can be mapped onto the "row model" for partially frustrated triangular magnets. We present heat capacity measurements that reveal a phase transition at T_N = 1.18K, indicative of magnetic ordering. The zero-field magnetically ordered structure was solved from neutron powder diffraction data taken between 0.04 and 1.2 K. It consists of an incommensurate spiral with a temperature independent propagation vector Q=(2Q 0 0)=(+/-0.622 0 0), where different signs relate to the two different networks. This corresponds to (+/-0.311 +/-0.311 0) in a quasi-hexagonal representation. The ordered moment mu=3.3mu_B is about 2/3 of the full Mn2+ moment. From the values of T_N and Q, the exchange parameters J/k = 0.15 K and J'/J = 0.749 are estimated. The magnetic-field dependence of the intensity of the Bragg reflection, measured for external fields H||Q, indicates the presence of three different magnetic phases. We associate them with the incommensurate spiral (H < 13.5 kOe), an intermediate phase (13.5 kOe 16 kOe) proposed for related compounds. For increasing fields, Q continuously approaches the value 1/3, corresponding to the commensurate magnetic structure of the fully frustrated triangular lattice. This value is reached at H_c = 19 kOe. At this point, the field-dependence reverses and Q adopts a value of 0.327 at 26 kOe, the highest field applied in the experiment. Except for H_c, the magnetic ordering is incommensurate in all three magnetic phases of Mn[C(CN)3]2.Comment: accepted for publication in J. Phys.: Condens. Matte

Magnetic-Field Induced Gap in One-Dimensional Antiferromagnet KCuGaF6_6

Magnetic susceptibility and specific heat measurements in magnetic fields were performed on an $S=1/2$ one-dimensional antiferromagnet KCuGaF$_6$. Exchange interaction was evaluated as $J/k_{\rm B}\simeq 100$ K. However, no magnetic ordering was observed down to 0.46 K. It was found that an applied magnetic field induces a staggered magnetic susceptibility obeying the Curie law and an excitation gap, both of which should be attributed to the antisymmetric interaction of the Dzyaloshinsky-Moriya type and/or the staggered $g$-tensor. With increasing magnetic field $H$, the gap increases almost in proportion to $H^{2/3}$.Comment: Submitted to Proceedings of Research in High Magnetic Fiel

Electron Spin Resonance in sine-Gordon spin chains in the perturbative spinon regime

We report the low-temperature multi-frequency ESR studies of copper pyrimidine dinitrate, a spin-1/2 antiferromagnetic chain with alternating $g$-tensor and the Dzyaloshinskii-Moriya interaction, allowing us to test a new theoretical concept proposed recently by Oshikawa and Affleck [Phys. Rev. Lett. 82, 5136 (1999)]. Their theory, based on bosonization and the self-energy formalism, can be applied for precise calculation of ESR parameters of $S=1/2$ antiferromagnetic chains in the perturbative spinon regime. Excellent quantitative agreement between the theoretical predictions and experiment is obtained.Comment: 4 pages, 4 figure

Rare earth magnetism and ferroelectricity in RMnO3

Magnetic rare earths R have been proven to have a significant effect on the multiferroic properties of the orthorhombic manganites RMnO3. A re-examination of previous results from synchrotron based x-ray scattering experiments suggests that symmetric exchange striction between neighboring R and Mn ions may account for the enhancement of the ferroelectric polarization in DyMnO3 as well as the magnetic-field induced ferroelectricity in GdMnO3. In general, adding a second magnetic species to a multiferroic material may be a route to enhance its ferroelectric properties.Comment: Contribution to ICM 2009; accepted for publication in Journal of Physics: Conference Serie

APPLICATION OF THE DYA METHOD TO COMPARE WHEAT CULTIVAR YIELDS

At the 1998 conference, we proposed use of the DYA (differential yielding ability) method to compare the yielding ability of wheat cultivars. In this paper we review the method: its models and assumptions, and then show computation of sample statistics. An example will exhibit the output from performance trial yields when the method is applied in one of the nine ecogeographic areas of fall-planted wheat in the Midwest. Results of comparable outputs over years forecasted which cultivars would become popular with growers in Kansa