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Undergraduate biology education is often viewed as being focused on memorization rather than development of students’ critical-thinking abilities. We speculated that open-note testing would be an easily implemented change that would emphasize higher-order thinking. As open-note testing is not commonly used in the biological sciences and the literature on its effects in biology education is sparse, we performed a comprehensive analysis of this intervention on a primary literature–based exam across three large-enrollment laboratory courses. Although students believed open-note testing would impact exam scores, we found no effect on performance, either overall or on questions of nearly all Bloom’s levels. Open-note testing also produced no advantage when examined under a variety of parameters, including research experience, grade point average, course grade, prior exposure to primary literature–focused laboratory courses, or gender. Interestingly, we did observe small differences in open- and closed-note exam performance and perception for students who experienced open-note exams for an entire quarter. This implies that student preparation or in-test behavior can be altered by exposure to open-note testing conditions in a single course and that increased experience may be necessary to truly understand the impact of this intervention. 相似文献
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Brian K. Sato Pavan Kadandale Wenliang He Paige M. N. Murata Yama Latif Mark Warschauer 《CBE life sciences education》2014,13(4):677-686
Primary literature is essential for scientific communication and is commonly utilized in undergraduate biology education. Despite this, there is often little time spent training our students how to critically analyze a paper. To address this, we introduced a primary literature module in multiple upper-division laboratory courses. In this module, instructors conduct classroom discussions that dissect a paper as researchers do. While previous work has identified classroom interventions that improve primary literature comprehension within a single course, our goal was to determine whether including a scientific paper module in our classes could produce long-term benefits. On the basis of performance in an assessment exam, we found that our module resulted in longitudinal gains, including increased comprehension and critical-thinking abilities in subsequent lab courses. These learning gains were specific to courses utilizing our module, as no longitudinal gains were seen in students who had taken other upper-division labs that lacked extensive primary literature discussion. In addition, we assessed whether performance on our assessment correlated with a variety of factors, including grade point average, course performance, research background, and self-reported confidence in understanding of the article. Furthermore, all of the study conclusions are independent of biology disciplines, as we observe similar trends within each course. 相似文献
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Flávio R. M. Pavan Magno T. M. Silva Maria D. Miranda 《Journal of The Franklin Institute》2018,355(1):596-624
In this paper, we propose a numerically robust blind equalization scheme to mitigate cochannel and intersymbol interferences and separate signals from a convolutive mixture in multiple-input multiple-output (MIMO) communication systems. The robustness of the proposed scheme is achieved through a particular dual-mode operation applied to a constant-modulus-based space-time algorithm that corrects phase rotations. In the first mode of operation, the consistency in the nonlinear estimates of the transmitted signals is ensured. In the second mode, the Euclidean norms of the equalizer coefficient vectors decrease along the iterations, which allows the algorithm to return to the first mode of operation, where the estimation of the transmitted signals really occurs. In particular, we apply this scheme to a multimodulus version of the multiuser Shalvi-Weinstein algorithm (MU-SWA). By means of a deterministic stability analysis assuming the persistence of excitation condition, we show that the dual-mode MU-SWA does not diverge. 相似文献
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S. V. Suresh Babu M. M. Shareef A. Pavan Kumar Shetty K. Taranath Shetty 《Indian journal of clinical biochemistry : IJCB》2002,17(2):7-26
Quantification of total and individual amino acids in biological fluids such as plasma, urine and cerebrospinal fluid has
an important diagnostic implication in laboratory medicine. The present paper describes protocols for the assay of total amino
acids by modified method based on dinitrophenyl and HPLC profile involving pre-column derivatization with o-pthalaldehyde
(OPA) derivatization, respectively. The method, based on the alkylation of-SH groups prior to OPA derivatization of amino
acids followed by reverse phase high performance liquid chromatography, provide a comprehensive profile of more than twenty
amino acids (including-SH group containing) in a single run lasting about 45 minutes. The present study, apart from establishing
the normal profile of amino acids in plasma of Indian sub population, also presents HPLC profile for some of the rare amino
acidopathies. 相似文献
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