Structure and UV emission of nanocrystal ZnO films by thermal oxidation of ZnS films

ZnO films prepared by the thermal oxidation of the ZnS films through thermal evaporation are reported. The as-deposited ZnS films have transformed to ZnO films completely at 400 degrees C. The 400-700 degrees C annealed films with a preferential c-axis (002) orientation have a hexagonal wurtzite structure. The band gap of ZnO films shifts towards longer wavelength with the increase of the annealing temperature. The relationship between the band gap energy of ZnO films and the grain size is discussed. The shift of the band gap energy can be ascribed to the quantum confinement effect in nanocrystal ZnO films. The photoluminescence spectra of ZnO films show a dominant ultraviolet emission and no deep level or trap state defect emission in the green region. It confirms the absence of interstitial zinc or oxygen vacancies in ZnO films. These results indicate that ZnO film prepared by this simple thermal oxidation method is a promising candidate for optoelectronic devices and UV laser. (c) 2005 Elsevier BN. All rights reserved.

Influence of different post-treatments on the structure and optical properties of zinc oxide thin films

Zinc oxide (ZnO) films with c-oriented were grown on fused quartz glass substrates at room temperature using dc reactive magnetron sputtering. The as-grown films were annealed at 700 degrees C in air and bombarded by ion beam, respectively. The effects of post-treatments on the structural and optical properties of the ZnO films were investigated by X-ray diffraction (XRD), photoluminescence (PL), optical transmittance and absorption measurements. The XRD spectra indicate that the crystal quality of ZnO films has been improved by both the post-treatments. Compared with the as-grown sample, both annealed and bombarded samples exhibited blueshift in the UV emission peaks, and a strong green emission was found in the annealed ZnO film. In both optical transmittance and absorption spectra, a blueshift of the band-gap edge was observed in the bombarded film, while a redshift was observed in the annealed film. (c) 2004 Elsevier B.V. All rights reserved.

Geoarqueología y reconstrucción de contextos arqueológicos: Contribución y nuevas perspectivas desde el Área de Prehistoria de la Universidad del País Vasco

Homenaje a Ignacio Barandiarán Maestu / coord. por Javier Fernández Eraso, Juan Santos Yanguas.

南亚热带森林植物生物量、生产力及能量利用效率研究

以南亚热带地带性植被季风常绿阔叶林、各种人工林、半自然林和灌草丛等群落为对象，在长达十余年的时间里研究了各群落的冠层结构、辐射能环境和生理生态特征等，在此基础上采用了有关的数字模型进行模拟，并用时空替代的方法将天然林和人工林结合起来分析了生态系统动态演替过程中的能量生态特征。该成果填补了世界上本地带植被生物量和生产力研究的空白，对能量生态学的定义、研究体系和研究历史有新的认识。此外，在生物量和生产力、叶面积指数、细根生物量、测树器等研究方法上有创新。发表专著1本，论文56篇，论文中有15篇发表国际刊物上，42篇发表在国内核心刊物上。论文发表后，被SCI收录2篇共5次，STP收录2篇、被BA和CA等国外文摘收录21篇次，被国内各类文摘收录50次，被国内学者引用700多次。研究成果达国际先进水平，某些方面达国际领先水平。

《中国双子叶木本植物叶的宏观结构》（英文版）

本书是一部区域性的系统记载植物叶形态的专著，对我国华南地区习见的96科、315属、700多种双子叶木本植物叶的宏观结构，包括：叶形、脉序：1-6级脉、脉岛、盲脉、叶缘脉等形态，逐一分布加以描叙，在各属内列有脉序特征为依据的分种检索表，每种除文字记载外，均附有显示叶形及各级脉序的照片两帧，以便于鉴定。所引用的标本均标明出处，以便查对。此外还附有每种植物的地理分布、习性、生境等资料。这样内容的书在我国尚属首次。目前国内外发表的叶片脉序论著都是专科专属的研究。本书研究记载范围广，资料性较强对研究现代双子叶植物分类系统有重要参考价值，对古植物学研究有很大帮助，对地质工作也有一定的实用意义。全书用英文撰写，更便于各国学者交流参考。

Elebitasunetik eleaniztasunera. Ikastolen “Eleanitz-English” hezkuntza berrikuntza proiektua: oinarriak, bilakaera eta ekarpenak (1991-2010)

437 p.

Hizkuntza eskubideak estatuz gaineko Europan

Egungo Europa 50 estatu inguruk osatzen dute eta bertan 700 milioitik gora pertsonak hitz egiten dituzten 200 hizkuntza baino gehiago daude. Geografikoki eremu nahiko mugatua eta txikia izan arren, oso anitza ere badela esan dezakegu. Hizkuntza alorrean dagoen aniztasun horren gainean Europan egin den kudeaketa azaltzen ahaleginduko naiz lan honen bitartez, horretarako Europan azken hamarkadetan aintzatetsitako hizkuntza eskubideak, horien eraentza eta horien baitan emandako jurisprudentzia azalduz.

Length-weight relationship of small pelagic fish species of the southeast and South Brazilian Exclusive Economic Zone

The length-weight relationship (LWR) parameters of 23 small pelagic fish species (belonging to 13 families) from the south-southeast Brazilian Exclusive Economic Zone in 1996 and 1997 are presented. The b values varied between 2.72 and 3.53. The samples for this study were collected during hydroacoustic surveys covering an area of 700 000 square km.

Results of bottom trawl surveys carried out in Vietnamese waters (20-200 m) in 1996-1997

Bottom trawl surveys were conducted in the southwest monsoon season in 1996 (survey 1) and in the northeast monsoon season in 1996-97 (survey 2) throughout Vietnamese waters. The surveys mainly covered the depth zone 50-200 m but in the northeast monsoon season the depth zone 20-50 m was included in the northern and southern areas. Overall, 273 trawl hauls were conducted. The total biomass for Vietnamese waters in the depth zone 20-200 m was estimated at 700 000 t . Biomass estimates are given for the most abundant species. A relatively higher mean catch-per-unit effort (CPUE) was obtained from survey 2 than from survey 1 and in partcular at depth ranges 50-100 and 100-200 m in south Vietnam. Overall, the dominant families were Monacanthidae (34%), Carangidae (15%), Trichiuridae (9%) and Synodontidae (6%).

Remote sensing and field assessment of tsunami effects on coastal pond aquaculture in northern Sumatra

An attempt was made to conduct spatial assessment of the pattern and extent of damage to coastal aquaculture ponds along the east coast of Aceh province in Sumatra, Indonesia, resulting from the tsunami event of 26 December 2004. High-resolution satellite imagery, i.e., SPOT-5 multispectral scenes covering the 700 km stretch of the coast, acquired before and after the tsunami, were digitally enhanced and visually interpreted to delineate pockets of aquaculture ponds that were discerned to be damaged and relatively intact. Field checks were conducted at 87 sites in the four eastern coastal districts. The results indicate that SPOT-5 multispectral imagery was minimally sufficient to detect areas of damaged and relatively intact aquaculture ponds, but the 10-m spatial resolution poses limitations to evaluating the extent of pond damage. Nevertheless, the 60 km swath of the imagery makes it reasonably affordable for large-area assessment to identify pockets of severe damage for targeting more detailed assessments. The image maps produced from a mosaic of the SPOT-5 scenes can also serve as base maps for spatial planning in the challenging task of reconstruction and rehabilitation of the disrupted livelihoods of the coastal communities.

Chartered Trawling on the Brazilian Slope

Commercial trawling on the Atlantic slope areas off Brazil intensified in the late 1990’s owing to the expansion of coastal trawling areas and the operations of a chartered foreign fleet. Between 2000 and 2003, 59 fishing trips conducted by 10 chartered trawlers were intensely monitored by observers and satellite vessel monitoring systems, totaling 9,069 tows and 30,085.2 trawling hours. Fishing operations occurred in northern, northeastern, southeastern, and southern sectors of the Brazilian coast in 60–1,173 m depths. Total retained and processed catch were 8,074.6 t and 6,479.8 t, respectively. Argentine hake, Merluccius hubbsi; and Argentine shortfin squid, Illex argentinus, were the primary species taken contributing to 41.1% and 28.6% of the overall catch, respectively. The silver John dory, Zenopsis conchifera; monkfish, Lophius gastrophysus; Brazilian codling, Urophycis mystacea; and the black grouper, Epinephelus nigritus, composed 23% of total processed catch, and the remaining 7.2% was composed of deep-sea shrimps (family Aristeidae) and other teleosts and elasmobranches. The occupation of slope areas included an early exploratory phase, followed by directed phases of the upper slope (300–500 m), aiming principally at the Argentine hake, and the lower slope (>700 m), targeting valuable concentrations of deep-sea aristeid shrimps. The role of chartering for slope trawling development was critically addressed. We conclude that chartered vessels were efficient explorers and were particularly important in areas not available to the technologically limited national fleet. Because the charters were market-oriented and had elevated profit demands, however, those vessels quickly turned from exploration to exploitation and competed with national trawlers in shallower areas and produced significant impacts on Brazil’s modest deep-sea resources.