254,542 research outputs found
Scaptodrosophila zebromyia Peng, Lin & Chen, 2022, nom. nov.
No full textScaptodrosophila zebromyia nom. nov. Scaptodrosophila zebrina Liu & Chen, 2018, hom. of S. zebrina (Bezzi, 1928). Distribution. China (Yunnan).Published as part of Peng, Hongen, Lin, Yong & Chen, Hongwei, 2022, Morphological and molecular evidence of eight new species of the genus Scaptodrosophila Duda (Diptera, Drosophilidae) from China, pp. 169-194 in Zootaxa 5093 (2) on page 186, DOI: 10.11646/zootaxa.5093.2.3, http://zenodo.org/record/590508
Messageria scalarioides subsp. donghiana Chen & Lin 2021
No full textMessageria scalarioides donghiana Z.-Y. Chen & L.-W. Lin, n. ssp. Figures 1E–H, 2A Holotype: HBUMM 10058, a big cave in mountains between Fengshan County [Hechi City] and Leye County [Baise City], Guangxi Zhuang Autonomous Region, China, ex coll. Hao Yang, 2012. Paratypes: CZY/1, LLW/1, same data as holotype. Etymology. This name comes from the local Zhuang language “dongh”, which means “cave”. Diagnosis. This subspecies can be distinguished from the nominate subspecies by the larger shell and wider lower whorls and umbilicus. Also, the aperture of M. scalarioides donghiana n. ssp. and 1/8 whorl behind it evidently deviate from the axis and umbilicus. Measurements. H = 3.70 mm, W = 3.37 mm, D A = 1.89 mm (holotype). Vernacular name. Į梯Ħfiḏ洞Ë亚ḋ xuán tī chóng lèi luó dòng xué yà zhǒng Distribution. CHINA: Guangxi.Published as part of Chen, Zhe-Yu & Lin, Li-Wen, 2021, Notes on the genus Messageria Bavay & Dautzenberg, 1904, with descriptions of a new speciesand anew subspecies (Gastropoda: Caenogastropoda: Cyclophoroidea Alycaeidae), pp. 129-134 in Zootaxa 5067 (1) on pages 131-132, DOI: 10.11646/zootaxa.5067.1.9, http://zenodo.org/record/565663
Does Downloading PowerPoint Slides Before the Lecture Lead to Better Student Achievement?: Reply
Full text linkThis reply responds to a comment by Cannon (2011) that opens the debate on consistency of the effect of downloading PowerPoint slides before lectures on students’ exam performance. Cannon (2011) points out potential endogeneity problems in Chen and Lin (2008) and attempts to explore the unconditional mean effect of downloading PowerPoint slides for the full sample. In this reply, we firstly argue that the estimates in our original article are consistent since the effect of interest is the “conditional†treatment effect but not the unconditional mean effect. We provide explanations for our rationale of estimating the “conditional†treatment effect. Secondly, we propose a modified downloading variable to replicate Cannon’s analysis. Our results suggest that downloading PowerPoint slides before the exam does not produce a significant effect on absent students’ exam performance which is different from the results in Cannon (2011). Our analysis does support Cannon’s argument that students fixed effects are different across different attendance status.
The Structural Properties of a-SINx:H Prepared by Plasma Enhanced Chemical Vapor Deposition
No full textActive Hollow Four Quadrant Orientation Detector Array for Application to Pattern Recognition
No full textThe Structural and Optical Properties of a-SiNx:H Prepared by Plasma Enhanced Chemical Vapor Deposition
No full textComment on Chen and Lin “Does downloading Powerpoint slides before the lecture lead to better student achievement?â€
Full text linkChen and Lin (2008) is an interesting attempt to measure the effect of students having access to PowerPoint slides before a lecture. They argue that such access leads to better learning outcomes as measured by higher exam marks. While their empirical results shed some light on students’ use of PowerPoint slides, I argue that they have not succeeded in isolating the treatment effect and the correlations cannot be interpreted as causal.
Active Hollow Four Quandrant Orientation Detector Array for Application to Pattern Recognition
No full textCharacterization of dual high transition temperature superconducting quantum interference device first-order planar gradiometers on a chip
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