Kindergarten Teachers’ Conceptual Framework on the Ozone Layer Depletion. Exploring the Associative Meanings of a Global Environmental Issue

This paper reports on a study conducted among Greek kindergarten teachers aiming to explore their conceptual frameworks on a major environmental issue of our times: the ozone layer depletion. The choice of this particular issue was premised on its novelty, complexity and abstractness which present teachers with difficulties in its teaching. A free word association task was employed to identify the associative meaning of the issue among the participant teachers. The study’s results revealed the existence of a simplistic, linear, cause-and-effect scheme in the teachers’ conceptual frameworks, the two poles of which are “solar radiation” and “its harmful results for human health”. Some of the well-known misconceptions and misunderstandings already emerged in previous research also arise in this study. Prominent among them are the deeply rooted confusion between the “ozone hole” and “greenhouse effect”, a general fusion of ideas concerning all environmental problems and an overemphasis on the harmful consequences of the ozone depletion on human health. Implications for kindergarten teacher education are also discussed.The present study is part of a research project that is co-funded by the European Social Fund and National Resources – (EPEAEK II) PYTHAGORAS II.     

基于人工神经网络的等离子熔积层形貌试验研究

1IntroductionPlasma deposition manufacturing(PDM)is a newlydeveloped direct metal fabrication process based onplasma transferred arc surfacing[1],as shown in Fig.1.Unlike most existing rapid prototyping techn-ologies,this technique is characterized by sup…     

Influence of Electrolyte on ESR of Medium Voltage Wet Tantalum Capacitors

In this paper, the influence of working electrolyte on high-frequency electrical performance of wet tantalum capacitors is studied. Emphasis is especially put on the study of the contribution of depolariser in reducing Equivalent Series Resistance(ESR). According to the theory of depolarization in electrochemistry and the theory of cathode capacitance of electrolytic capacitor, different kinds of depolarisers are added separately into the foregone electrolyte. Then capacitors are assembled with tantalum cores dipped with the compounded electrolytes. The best depolariser and its concentration in the whole electrolyte could be selected according to the test results of the capacitance and ESR of the capacitors. The results of our experiment show that depolariser Fe2 (SO4)3 used in working electrolyte of 100 V/IO0 μF wet tantalum capacitors can help to obtain lower ESR and higher capacitance at frequency from 0.1 kHz to 100 kHz.     

Fe／Mo（110）的电磁性质：第一性原理研究

应用自旋极化的第一性原理对在Mo（110）衬底上生长Fe薄膜进行系统研究．计算结果表明：紧邻界面的Mo原子层向外驰豫,而Fe原子层则表现向内驰豫．Fe／Mo（110）系统的键合表现为各向异性,在平行于Mo（110）表面方向,各个原子之间都表现为金属键,而在垂至于Mo（110）表面方向,Fe原子之间、Fe原子和Mo原子之间却表现为金属键．Fe／Mo薄膜中,Fe原子的磁矩大于体材料Fe原子的磁矩,以铁磁方式排列,并且在紧邻界面的Mo原子诱导出少量的磁矩,这些磁矩与Fe原子以反铁磁的方式排列．     

论形而上学的实质--片面性

片面性是形而上学的实质，形而上学的片面性是把事物的一个方面片面夸大，否认事物的另一方面，或不分主次把事物的两个方面并列起来，歪曲事物的矛盾关系。形而上学的表现形式是多种多样的。形而上学既具有其产生的可能性又具有现实性，还有其广泛活动的场所和滋生的温床。坚持辩证法，反对形而上学的任务是长期的艰巨的。     

吸水剖面资料在低渗透油藏开发中的应用

在低渗透性油藏的注水开发过程中,由于存在层间、层内、平面的三大矛盾,以及裂缝的存在,注入水主要沿着渗透性较好的方向单向突进,而相对低渗透层则吸水量较少或不吸水,对应油井变化是含水上升快和难以见到注水效果两极差异。利用吸水剖面测试技术,结合油水井动、静态资料可以从纵向上和横向上了解油层的吸水状况、水驱方向和注水波及特征。结合相关资料能对油水井作出及时的调整措施,达到提高注水效率和区块稳产的目的。     

DEVELOPMENT OF A "DRY BOUNDARY LAYER"

As one of applications of the DRS model the author developed, introduced in this paper is a model calculation of the advance of the planctary boundary laycr (PBL) before clouds form. First derived are quasi analytical formulations for the PLB developmcnt, which arc vcrificd by the latcr integration of the modcl. Then, in comparisons bcwecn with and without radiation, modcl results indicate that the sensible heat from. the sea is the main source of the PBL eddy, however, the radiative cooling not only prevents the cquilibrium air tcmpcraturc from approaching the surface temperature but also brings about a certain diurnal variation in the PLB thcrmal stucture.     

创业企业资源能力的生成机理及演化路径——以蒙草为例

本文选取蒙草进行典型案例研究，探究企业资源能力的生成机理及其演化路径，并阐释企业当前动态能力形成的内在机理。研究发现：（1）在企业迅速发展进程中，管理认知层战略判断与组织行动层战略执行是推动企业资源能力生成的重要因素；（2）企业资源能力的进阶主要受管理认知层发展观与组织行动层分工认知结果的导向行为的驱动，并析出企业资源能力的升级过程为“整合能力-延伸能力-再构能力”；（3）提出“认知-行动-能力”作用关系模型，理清管理认知层战略判断、组织行动层战略执行与企业资源能力演化的内在作用关系，并剖析了动态能力形成过程的内在作用机理。     

青藏高原新生代火车头山碱性及钙碱性两套火山岩的地球化学特征及其物源讨论

藏北羌塘火车头山新生代火山岩可区分为钙碱性及碱性两个不同的系列.钙碱性火山岩主要岩石组合为玄武岩-安山岩-英安岩,其SiO2介于49%～70%之间,Al2O3＞10%,Na2O/K2O＞1;其中玄武岩具平坦型稀土配分型式,LREE/HREE为1.3～1.8,（La/Yb）N为2.87～4.45,无明显铕异常,δEu为0.96～1.09;该套岩石的Mg#与SiO2相关关系以及La/Sm-La等亲岩浆元素与超亲岩浆元素协变关系表明,它们应为幔源岩浆经分离结晶演化的产物,其岩石组合类型以及低的Sm/Yb值（Sm/Yb=1.53～5.35）表明它们的原始岩浆应来源于岩石圈地幔尖晶石二辉橄榄岩的局部熔融.本区碱性火山岩为一套典型的钾质岩石系列,主要岩石组合类型为碱玄岩-碱玄质响岩-响岩,其SiO2介于44%～59%之间,Al2O3＞14%,Na2O/K2O介于0.47～1.51之间;岩石轻稀土强烈富集,LREE/HREE为13.20～15.76,（La/Yb）N=50.44～91.99;其岩石组合类型以及Mg^#与SiO2相关关系以及La/Sm-La协变关系同样表明它们为共源岩浆分离结晶演化的产物;然而,其较高的Sm/Yb值（Sm/Yb=2.63～13.98）表明它们并非地幔橄榄岩直接局部熔融的产物,岩石弱的负Eu异常（δEu=0.77～0.85）以及Th、U的强烈富集和Nb、Ta的相对亏损,又反映了原始岩浆中有显著的地壳物质的贡献;该套钾质碱性系列岩石在La/Co-Th/Co同分母协变图上呈直线型分布,而在La/Co-Sc/Th异分母协变图上呈显著的双曲线分布,从而表明其源区为二源混合型,是青藏高原特殊的壳幔混合层局部熔融的产物,这些特征是新生代青藏高原壳幔层圈物质交换的重要岩石学证据.     

孕妇外周血分离胎儿有核红细胞与FISH分析技术在无创性产前诊断中的应用分析

目的探讨孕妇外周血分离胎儿有核红细胞与FISH分析技术在无创性产前诊断中的应用。方法选取于2018年1月至2019年1月期间,20例11~24周妊娠高危孕妇,对外周血均按照常规密度梯度法,对单个核细胞进行分离,并选择红细胞特异性抗体CD71,HbF结合运用流式细胞仪设备行FACS分选富集NRBC,并行FISH分析技术。结果完成20例孕妇的外周血标本NRBC分选,达100%的分选率,其中CD71及HbF双阳性细胞(3.46±1.65)×10-2;对其中18例孕妇运用FISH分析技术均成功分析,未发现任何异常问题。结论经孕妇外周血内分离富集所得胎儿有核红细胞,运用FISH分析技术对胎儿特定染色体进行检测,能够实现无创性产前诊断及时发现遗传性疾病,可为临床改善母婴分娩预后结局提供指导。