静动结合的化学腐蚀法制备近场光学探针的理论分析

理论上分析了静动结合的化学腐蚀法制备探针的具体机理及过程。在静态腐蚀的过程中, 利用流体力学Young-Laplace方程的一级近似解获得了光纤插入到HF酸中形成的新月形高度。在动态腐蚀过程中, 详细分析了当静态腐蚀时间和动态腐蚀时间分别取不同值时, 光纤移动速度对光纤探针结构的影响。利用此法可制备出尖端锐利、大锥角或多锥体等各种结构的光纤探针。这为实验上制备出性能优良的探针, 为拓宽扫描近场光学显微镜的应用范围奠定基础。将上述理论分析的结果与本文实验中所得初步结果进行了比较, 所得结果一致。

La atracción de la falsa palabra y del código prohibido en Margaret Atwood: "Nolite te bastardes carborundorum"

Este trabajo ha sido realizado dentro del Grupo de Investigación GIU 10–19 “LITTERARVM. Grupo de Investigación en Literatura, Retórica y Tradición Clásica” de la UPV/EHU.

Implicaciones en la secuenciación cronológica rupestre del grafismo figurativo mueble gravetiense peninsular

[ES] Partiendo de la caracterización del ciclo gráfico mueble figurativo del Gravetiense peninsular (Morín, Antoliñako koba, El Castillo, Les Mallaetes y El Parpalló), se exploran las relaciones gráficas entre cada una de las piezas y los conjuntos rupestres. Se reflexiona sobre el orden cronológico y la dispersión espacial de las similitudes gráficas en el ámbito de la Península Ibérica. Se concluye que el ciclo gráfico gravetiense se caracteriza por un alto grado de normativismo gráfico, que las comparaciones permiten entender las tendencias gráficas como tradiciones de amplia distribución geográfica y que los datos actuales de índole cronológico no permiten discutir sobre bases concluyentes el desarrollo del ciclo gráfico gravetiense rupestre.

Spatial and seasonal relationships between Pacific harbor seals (Phoca vitulina richardii) and their prey, at multiple scales

Knowing where pinnipeds forage is vital to managing and protecting their populations, and for assessing potential interactions with fisheries. We assessed the spatial relationship between the seasonal distribution of Pacific harbor seals (Phoca vitulina richardii) outfitted with satellite transmitters and the seasonal distributions of potential harbor seal prey species in San Francisco Bay, California. Pearson’s correlation coefficients were calculated between the number of harbor seal locations in an area of the San Francisco Bay and the abundance of specific prey species in the same area. The influence of scale on the analyses was assessed by varying the scale of analysis from 1 to 10 km. There was consistency in the prey species targeted by harbor seals year-round, although there were seasonal differences between the most important prey species. The highest correlations between harbor seals and their prey were found for seasonally abundant benthic species, located within about 10 km of the primary haul-out site. Probable foraging habitat for harbor seals was identified, based on areas with high abundances of prey species that were strongly correlated with harbor seal distribution. With comparable local data inputs, this approach has potential application to pinniped management in other areas, and to decisions about the location of marine reserves designed to protect these species.

南雄县紫色土砂页岩流失区银合欢引种栽培

紫色砂页岩沟状重水土流失区，土层十分干旱，常见绿化造林树种极难生长。根据这种情况，1983年始，应用多年来对银合欢属树种具有耐高温、耐干旱，适宜碱性土壤生长的观察研究结果，在南雄县13个自然村，500公顷低丘陵荒坡地、应用银合欢属树种营造水保林，综合治理水土流失试验。经三年试验，从26个银合欢引种材料中，选出适宜当地生长的三个优良品种，提出了一套树种栽培营林和水保工程措施相结合的治理技术。经治理三年的营林地段，水土流失年冲刷模数（固体迳流）从未治理的每平方公里对照区流失量19.057吨下降到每平方公里流失量5.372吨每公里长林带（林带宽1.5米）生产造纸用材9.8吨，供饲料生产的干嫩叶2.8吨。该项研究，在国内率先提出了控制紫色砂页岩地区水土流失的先进技术，具有在我国同类型地区推广应用价值。