排序方式： 共有8条查询结果，搜索用时 546 毫秒
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Santeri Yrttiaho Belinda Bruwer Heather J. Zar Kirsten A Donald Susan Malcolm-Smith Lee Ginton Nadia Hoffman Eileen Vuong Dana Niehaus Jukka M. Leppänen Dan J. Stein 《Child development》2021,92(3):e236-e251
Maternal responses to infant facial expressions were examined in two socioeconomically diverse samples of South African mothers (Study I, N = 111; and Study II, N = 214; age: 17–44 years) using pupil and gaze tracking. Study I showed increased pupil response to infant distress expressions in groups recruited from private as compared to public maternity clinics, possibly reflecting underlying differences in socioeconomic status (SES) across the groups. Study II, sampling uniformly low-SES neighborhoods, found increased pupil dilation and faster orientation to expressions of infant distress, but only in the highest income group. These results are consistent with maternal physiological and attentional sensitivity to infant distress cues but challenge the universality of this sensitivity across socioeconomic diversity. 相似文献
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Quan‐Hoang Vuong 《Learned Publishing》2020,33(2):119-130
While researchers with retracted papers – publications that are withdrawn because of significant errors or scientific misconduct – carry a permanent stain on their publishing records, understanding the causes and initiators of such retractions can shed a different light on the matter. This paper, based on a random sample of 2,046 retracted papers, which were published between 1975 and 2019, extracted from Retraction Watch and the websites of major publishers, shows that 53% of the retraction notices do not specify who initiated the retraction. Nearly 10% of the retraction notes either omit or do not contain information related to reasons for retractions. Furthermore, most of the retracted papers in our sample have no limitation section; those who do are commonly unhelpful or irrelevant. The results carry three implications for scientific transparency: retraction notices need to be more informative; limitation sections ought to be a required and even an open section of all published articles; and finally, promoting ‘heroic acts’ in science can positively change the current publishing culture. 相似文献
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Foams have many useful applications that arise from the structure and size distribution of the bubbles within them. Microfluidics allows for the rapid formation of uniform bubbles, where bubble size and volume fraction are functions of the input gas pressure, liquid flow rate, and device geometry. After formation, the microchannel confines the bubbles and determines the resulting foam structure. Bubbly structures can vary from a single row ("dripping"), to multiple rows ("alternating"), to densely packed bubbles ("bamboo" and dry foams). We show that each configuration arises in a distinct region of the operating space defined by bubble volume and volume fraction. We describe the boundaries between these regions using geometric arguments and show that the boundaries are functions of the channel aspect ratio. We compare these geometric arguments with foam structures observed in experiments using flow-focusing, T-junction, and co-flow designs to generate stable nitrogen bubbles in aqueous surfactant solution and stable droplets in oil containing dissolved surfactant. The outcome of this work is a set of design parameters that can be used to achieve desired foam structures as a function of device geometry and experimental control parameters. 相似文献
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Hoang Anh-Duc Pham Hiep-Hung Nguyen Yen-Chi Nguyen Le-Kim-Ngan Vuong Quan-Hoang Dam Minh Q. Tran Trung Nguyen Tien-Trung 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2020,66(4):457-485
International Review of Education - The purposes of the study presented in this article were twofold. One was to respond to the question: what makes a quality curriculum? within the framework of... 相似文献
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A size-selective cell sorting microfluidic device that utilizes optical force is developed. The device consists of a three-dimensional polydimethylsiloxane microstructure comprised of two crossed microchannels in a three-dimensional configuration. A line shaped focused laser beam is used for automatic size-selective cell sorting in a continuous flow environment. As yeast cells in an aqueous medium are fed continuously into a lower channel, the line shaped focused laser beam is applied (perpendicular to the direction of flow) at the junction of the two crossed channels. The scattering force of the laser beam was employed to push cells matching specific criteria upward from one channel to another. The force depends on the size of the cells, the laser power, and the fluid flow speed. The variation in size of yeast cells causes them to follow different routes at the intersection. For flow speeds below 30 μm∕s, all yeast cells larger than 3 μm were removed from the main stream. As a result, a high purity sample of small cells can be collected at the outlet of bottom channel. 相似文献
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Quan‐Hoang Vuong 《Learned Publishing》2019,32(4):314-324
This article discusses the emergence of academic publishing in a fast‐growing transition economy, Vietnam, where the race has heated up to publish in international journals, preferably with a high impact factor, and to accelerate the indexing of domestic journals. Within the fields of SSH alone, the publication output grew by 17% a year in the 2008–2018 period, encouraged by government policies and financial incentives for researchers. This review demonstrates an environment where there is sufficient financial growth to support increased R&D but limited skills and knowledge of how to increase quality publication output, either within national or international journals. The article highlights the drivers of increasing scientific publication output, as well as the traps and pitfalls that follow this competition. It suggests that there are opportunities for publishers and other organizations to improve ethical and practical publishing issues and to develop co‐publishing agreements that will increase the visibility of the country in international academia. The article indicates the harsh reality of pursuing higher publishing standards in academia, a world that has long been dominated by authors and publishers from industrialized countries. 相似文献
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Quan‐Hoang Vuong 《Learned Publishing》2020,33(1):64-68
Key points
- Societies face increasing pressure to contain costs and retain revenues, which are threatened by open access mandates.
- Funders and other science publishing campaigns need to recognize the value of learned societies and work with them to sustain the production of quality knowledge.
- Self‐publishing via preprint servers may threaten the quality of academic research.
- Societies can reinforce their value proposition through a model of academic entrepreneurship, including research activities, media engagement, and consultancy.
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We investigated the role of dynamic information in human and pigeon object recognition. Both species were trained to discriminate
between two objects that each had a characteristic motion, so that either cue could be used to perform the task successfully.
The objects were either easy or difficult to decompose into parts. At test, the learned objects could appear in their learned
motions, the reverse of the learned motions, or an entirely new motion, or a new object could appear in one of the learned
motions. For humans, any change in the learned motion produced a decrement in performance for both the decomposable and the
nondecomposable objects, but participants did not respond differentially to new objects that appeared in the learned motions.
Pigeons showed the same pattern of responding as did humans for the decomposable objects, except that pigeons responded differentially
to new objects in the learned motions. For the nondecomposable objects, pigeons used motion cues exclusively. We suggest that
for some types of objects, dynamic information may be weighted differently by pigeons and humans. 相似文献
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