不含分形维数的细颗粒泥沙沉速计算方法研究（英文）     

Jin-xiao ZHAO  Guo-lu YANG  Monika KREITMAIR  Yao YUE 《浙江大学学报(A卷英文版)》2018,(7)

目的:推导一种高精度、使用简单且不含有分形维数的细颗粒泥沙沉速计算方法,以应用于原位观测和实现不同计算结果间的相互比较。创新点:1.推导出了不含有分形维数的泥沙絮团沉速公式;2.将LISST等高精度仪器应用于泥沙絮团密度计算中。方法:1.通过理论推导,得到不含分形维数的粘性细颗粒泥沙沉速公式;2.通过试验对该公式的精度进行研究,并在此基础上研究不同密度计算方法对该公式精度的影响;3.研究不同沉速状态下,泥沙絮团的沉降规律。结论:1.通过对比实测沉速与计算沉速的结果可以看出,本文提出的絮团沉速公式在计算泥沙絮团的沉速时精度较高;2.通过比较两种不同密度计算方法的结果可以看出,变密度方法具有更高的精度;3.通过拟合结果可以看出,公式(15)中的参数η与泥沙所处的沉降区间有关,参数γ与泥沙自身的性质有关。  相似文献   

Infants’ Social Experiences in Three African Sociocultural Contexts          下载免费PDF全文

Hiltrud W. R. Otto  Nicole Schuitmaker  Bettina Lamm  Monika Abels  Yan Serdtse  Relindis Yovsi  Mark Tomlinson 《Child development》2017,88(4):1235-1250

This study introduces a peri‐urban context of poverty to the study of child development in Africa in contrast to the more typical assessments in middle‐class and rural contexts. Spot observations were used to assess universal caregiving behaviors toward seventy‐six 3‐month‐old infants. Results show that middle‐class infants experienced distal parenting behaviors instantiated by mothers, whereas rural children experienced proximal parenting practices in interactions with others. Infants growing up in poverty had mothers and other caretakers involved at mostly low levels. They experienced low levels of body contact, body stimulation, and object stimulation, and high levels of face‐to‐face positions. The study indicates that caregiving in the context of poverty does not necessarily follow familiar pathways and needs to be contextualized accordingly.  相似文献   

CANopen验证——如何让你的设备按照既定设计运行     

Monika Mack 《中国科技信息》2006,(20):335-336

随着CANopen的重要性与日俱增，促进了对CiA开发和生产的CANopen一致性测试工具（Conformance Test Tool）的需求。  相似文献   

Do museums foster innovation through engagement with the cultural and creative industries?     

Dalle Nogare  Chiara  Murzyn-Kupisz  Monika 《Journal of Cultural Economics》2021,45(4):671-704

The recent narrative on museums as catalysts of innovation and growth considers their relations with other cultural and creative industries (CCIs) to be very important. We argue that most relations museums establish with CCI firms and institutions are unlikely to produce strong positive externalities that make the latter more innovative. To prove this claim, we propose a conceptual framework qualifying project-based and supply chain relations between museums and CCIs as either strong, moderate, or weak links, according to their potential in terms of knowledge spillovers from museums to CCIs. We apply this taxonomy to data collected from 261 Polish museums. Our findings indicate that strong links are outnumbered by moderate and weak ones. We then suggest that the traditional missions of museums, in particular education and conservation, need to be more thoroughly assessed in terms of their direct and indirect contributions in order to fully capture the impact of museums on innovation in the wider economy.

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Erfolg(+)reich und verdorben?     

Monika Frenger  Dr. Werner Pitsch  Univ.-Prof. Dr. Eike Emrich 《Sportwissenschaft》2012,42(3):188-201

In the context of increasing commercialization of certain sports its influence on the incidence of doping in sport is often discussed. Economic incentives should influence the decision of individuals in two ways. On the one hand the amount of prize money is mentioned and on the other hand relative influences which relate to the unequal distribution of funds depending on the ranking in the competition. Based on the consideration of prize money payments in international senior competitions in two independent survey years the level and distribution of prize money in competitions will be presented. The absolute amount of the prize money explains a significant proportion of the variance in the doping affinity in the observed sports disciplines (36?%). Unequal Payouts depanding on ranking, show no significant relationship to the doping affinity. The results thus provide indications on revenue opportunities through successful participation in competitions and some empirical evidence on economic arguments in connection with the doping debate.  相似文献   

X-ray radiography and tomography for monitoring the penetration depth of consolidants in Opuka – the building stone of Prague monuments     

Monika Slavíková  František Krejčí  Jan Žemlička  Michal Pech  Petr Kotlík  Jan Jakůbek 《Journal of Cultural Heritage》2012,13(4):357-364

Stone consolidation is one of the major restoration treatments used for historical monuments preservation. A natural stone is a complicated heterogeneous porous system making the process of consolidation dependent on many variables. In practical restoration aims, for a given stone type, the selection of a suitable consolidant and consolidation conditions therefore remains a complex issue. The impregnation depth is a key factor for the assessment of the treatment efficiency. The combination of state-of-the-art hybrid pixel semiconductor detectors with newly available micro-focus X-ray sources makes possible to apply X-ray radiography, an ideal non-destructive tool, for penetration depth monitoring. In this study, high-resolution X-ray radiography is used for monitoring the penetration depth of organosilicon consolidants in the Opuka stone. The penetration depth has been evaluated in relation to the time of consolidation, stone porosity and consolidation mixtures properties. The exact influence of the X-ray contrast agent on the consolidation depth has been investigated as well. The information obtained provides supplementary knowledge on the suitability of investigated products for the treatment of this type of stone. In our study, the capabilities of X-ray radiography have been demonstrated on X-ray radiography simple projections, high-resolution computed tomography (CT) as well as on the dynamic processes monitoring. The results thus can serve also as an instrumental and methodological example applicable for consolidation monitoring of other stone types.  相似文献   

Exploring the Impact of Assessment on Medical Students’ Learning     

Robyn Preston  Monica Gratani  Kimberley Owens  Poornima Roche  Monika Zimanyi 《Assessment & Evaluation in Higher Education》2020,45(1):109-124

Abstract

What and how students learn depend largely on how they think they will be assessed. This study aimed to explore medical students’ perception of the value of assessment and feedback on their learning, and how this relates to their examination performance. A mixed methods research design was adopted in which a questionnaire was developed and administered to the students to gain their perceptions of assessments. Perceptions were further explored in focus group discussions. Survey findings were correlated with students’ performance data and academic coordinators’ perceptions. Students’ perceptions of the level of difficulty of different assessments mirrored their performance in examinations, with an improvement observed in clinical assessments as students progressed through their degree. Students recognised that feedback is important to allow improvements and seek more timely, better quality and personalised feedback. Academic coordinators identified that some of the students’ suggestions are more realistic than others. Students had a positive attitude towards assessment, but emphasised the need for educators to highlight the relevance of assessment to clinical practice.  相似文献   

Current status of the lateral flow immunoassay for the detection of SARS-CoV-2 in nasopharyngeal swabs     

Anita Somborac Ba ura  Marija Doroti&#x;  Leonarda Gro&#x;i&#x;  Monika Dimbeg  Slavica Dodig 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2021,31(2)

Early detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and diagnosis of coronavirus disease 2019 (COVID-19) are priorities during the pandemic. Symptomatic and suspected asymptomatic individuals should be tested for COVID-19 to confirm infection and to be excluded from social interactions. As molecular testing capacity is overloaded during the pandemic, rapid antigen tests, such as lateral flow immunoassays (LFIAs), can be a useful tool as they allow greater test availability and obtain results in a very short time. This short review aims to present the analytical properties of LFIAs in the detection of SARS-CoV-2 in nasopharyngeal swabs. Lateral flow immunoassay is a method that combines thin-layer chromatography and indirect immunochemical sandwich method and allows the detection of a specific SARS-CoV-2 antigen in nasopharyngeal swabs. Swab specimens should be adequately collected and tested as soon as possible. Users should pay attention to quality control and possible interferences. Antigen tests for SARS-CoV-2 show high sensitivity and specificity in cases with high viral loads, and should be used up to five days after the onset of the first symptoms of COVID-19. False positive results may be obtained when screening large populations with a low prevalence of COVID-19 infection, while false negative results may happen due to improper specimen collection or insufficient amount of antigen in the specimen. So as to achieve reliable results, a diagnostic accuracy study of a specific rapid antigen test should be performed.  相似文献   

Diversifying philosophy: The art of non-domination*     

Monika Kirloskar-Steinbach 《Educational Philosophy and Theory》2013,45(14):1490-1503

Using the example of cross-cultural philosophy’s relation to disciplinary philosophy, this article seeks to think through some of the issues relevant to diversifying philosophy as an academic discipline. Guided by James Tully’s ruminations on non-domination, it attempts to make a case for a practice of philosophy which is more attuned to its social situatedness in a postindustrial, liberal society. Within this context, it argues that disciplinary philosophy must seek to contribute to making meaning of our place in the world.  相似文献   

Implementation of open educational resources in a nursing programme: experiences and reflections     

Marie Elf  Ebba Ossiannilsson  Maria Neljesjö  Monika Jansson 《Open Learning》2013,28(3):252-266

The IMPOER project (implementation of open educational resources, OER) aimed to implement OER in a nursing programme at Dalarna University, Sweden. The university and its nursing programme have long engaged in e-learning, and the nursing programme has recently been awarded the European Association of Distance Teaching Universities E-xcellence Associates Quality Label. The quality award was based on the creation of a roadmap for the continuous development of e-learning and the implementation of OER. The results of the study illustrated that overall, the students and the educators were positive about using OER. They considered that this approach was a new way of learning, and they appreciated the fact that OER were free and easy to access. However, they felt overwhelmed by the amount of material that was available and they were concerned about quality. If the use of OER is to be sustainable, a change in attitudes and practices among students and teachers is likely needed regarding the use of resources on the web.  相似文献