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31.
This study examines the effect of antitrust regulation of patent consolidation on the development of follow-on innovations. Our reconciliation of the various strains of literature hypothesizes that in sectors where cumulative innovation is crucial to firms’ market operations, a firm that consolidates patents for substituting technologies for its already-possessed technologies discourages market competitions and follow-on innovation by competitors. In this case, antitrust regulation of patent consolidation is anticipated to positively affect competitors’ follow-on innovation. We empirically test this hypothesis with the case of the US Department of Justice's regulation of Novell's software patent transfers to four large proprietary software companies (i.e., Microsoft, Oracle, EMC, and Apple) in 2011. Our analyses using US patent, trademark, and copyright data have found evidence corroborating our hypothesis. Our research provides policy and scholarly implications regarding how antitrust law can be a complementary institution to the patent law for promoting innovation. 相似文献
32.
Kwon YH Casebolt JB 《Sports biomechanics / International Society of Biomechanics in Sports》2006,5(1):95-120
One of the most serious obstacles to accurate quantification of the underwater motion of a swimmer's body is image deformation caused by refraction. Refraction occurs at the water-air interface plane (glass) owing to the density difference. Camera calibration-reconstruction algorithms commonly used in aquatic research do not have the capability to correct this refraction-induced nonlinear image deformation and produce large reconstruction errors. The aim of this paper is to provide a through review of: the nature of the refraction-induced image deformation and its behaviour in underwater object-space plane reconstruction; the intrinsic shortcomings of the Direct Linear Transformation (DLT) method in underwater motion analysis; experimental conditions that interact with refraction; and alternative algorithms and strategies that can be used to improve the calibration-reconstruction accuracy. Although it is impossible to remove the refraction error completely in conventional camera calibration-reconstruction methods, it is possible to improve the accuracy to some extent by manipulating experimental conditions or calibration frame characteristics. Alternative algorithms, such as the localized DLT and the double-plane method are also available for error reduction. The ultimate solution for the refraction problem is to develop underwater camera calibration and reconstruction algorithms that have the capability to correct refraction. 相似文献
33.
Comparisons of the effects of typical and atypical typeface on reading performance among readers of different linguistic backgrounds may yield new insights into the psychology of word recognition. A total of 143 adults (i.e., 50 Chinese, 55 Koreans, 38 native English speakers) participated in the study that involved two computer-based naming tests. The tests presented words with letters that varied in size and shape in Experiment 1 and words containing scrambled letters in Experiment 2. Results from Experiment 1 showed that the interference effect of size and shape on word naming accuracy and latency was robust for all readers. Likewise, results from Experiment 2 showed a broad interference effect of scrambled letters on word naming; however, scrambled letters appeared less disruptive to word naming among Chinese readers compared to their Korean and native English speaking counterparts. Taken together, Chinese speakers were less efficient in recognizing atypical words at the sublexical level, but more efficient at the lexical level. 相似文献
34.
Laura Avendano Jessica Renteria Sarah Kwon 《Journal of educational administration and history》2019,51(1):66-82
ABSTRACTSTEM Education is sweeping the United States, prompted primarily by the recent adoption of the Next Generation Science Standards. The surge in interest in STEM Education is beneficial for local schools and communities, and promises to positively impact students, teachers, school leaders, community members, and the future workforce. Unfortunately, inequitable hegemonic structures and practices limit urban students’ access to knowledge, resources, and a comprehensive and fair educational experience. This article explores the STEM activities in place at the Center for Innovation in STEM Education (CISE), at a local university in greater Los Angeles. From a historical context, CISE data show that an approach to STEM education that focuses on serving underrepresented populations by creating a pipeline, can serve as an example for K-12 schools, universities, and educational leaders seeking equitable practices in the field of STEM education. We identify implications for leadership development for school leaders, teacher leaders, and districts. 相似文献
35.
Scaffolding is one of the critical features in a problem-based learning environment to address challenges associated with problem solving. While transfer of responsibility is considered as an ultimate goal in scaffolding that is adaptive and contingent, it is rarely studied and practiced. Thus, the purpose of this study was to inform a deeper understanding of one middle school teacher’s manner of soft scaffolding, which refers to just-in-time and contingent support, through teacher-student interaction to examine how transfer of responsibility was achieved. We investigated one middle school teacher’s forms of scaffolding during a problem of food systems and supply chains related multiple aspects of sustainability and social justice issues. Using conversation analysis, three discursive patterns in scaffolding emerged: (1) shifting patterns of turn-taking organization; (2) leaving room for the students to take responsibility by giving extended wait time; and (3) extending the discussion with different examples. The paper concludes with implications for PBL teachers and researchers.
相似文献36.
Several studies of the validity of the intensive time series design have revealed a post-intervention increase in the level of achievement data. This so called “momentum effect” has not been demonstrated through the application of an appropriate analysis technique. The purpose of this study was to identify and apply a technique that would adequately represent and describe such an effect if indeed it does occur, and to use that technique to study the momentum effect as it is observed in several data sets on the learning of the concept of plate tectonics. Subsequent to trials of several different analyses, a segmented straight line regression analysis was chosen and used on three different data sets. Each set revealed similar patterns of inflection points between lines with similar time intervals between inflections for those data from students with formal cognitive tendencies. These results seem to indicate that this method will indeed be useful in representing and identifying the presence and duration of the momentum effect in time series data on achievement. Since the momentum effect could be described in each of the data sets and since its presence seems a function of similar circumstances, support is given for its presence in the learning of abstract scientific concepts for formal cognitive tendency students. The results indicate that the duration of the momentum effect is related to the level of student understanding tested and the cognitive level of the learners. 相似文献
37.
Chris Rasmussen Oh Nam Kwon Karen Allen Karen Marrongelle Mark Burtch 《Asia Pacific Education Review》2006,7(1):85-93
This paper provides an overview of the Inquiry-Oriented Differential Equations (IO-DE) project and reports on the main results
of a study that compared students’ beliefs, skills, and understandings in IO-DE classes to more conventional approaches. The
IO-DE project capitalizes on advances within mathematics and mathematics education, including the instructional design theory
of Realistic Mathematics Education and the social negotiation of meaning. The main results of the comparison study found no
significant difference between project students and comparison students on an assessment of routine skills and a significant
difference in favor of project students on an assessment of conceptual understanding. Given these encouraging results, the
theoretical underpinnings of the innovative approach may be useful more broadly for undergraduate mathematics education reform. 相似文献
38.
Young-Hoo Kwon Ki Hoon Han Christopher Como Sangwoo Lee Kunal Singhal 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):231-246
The purpose of this study was to assess the validity of the X-factor computation methods and to examine whether direct relationships exist between the X-factor parameters and the clubhead velocity in a group of skilled male golfers (n = 18, handicap = ? 0.6 ± 2.1). Five driver trials were captured from each golfer using an optical motion capture system (250 Hz). Two plane-based methods (conventional vs. functional swing plane-based) and one Cardan rotation-based method (relative orientation) were used to compute select X-factor (end of pelvis rotation, top of backswing, ball impact (BI), and maximum), X-factor stretch (stretch and maximum stretch), and X-factor velocity (BI and maximum) parameters. The maximum clubhead velocity was extracted and normalized to golfer's body height to eliminate the effect of body size. A one-way repeated MANOVA revealed that the computation methods generated significantly different X-factor parameter values (p < 0.001). The conventional method provided substantially larger X-factor values than the other methods in the untwisting phase and the meaningfulness of select X-factor parameters generated by this method was deemed questionable. The correlation analysis revealed that the X-factor parameters were not directly related to the maximum clubhead velocity (both unnormalized and normalized). 相似文献
39.
The current study examined a mediating effect of empathic accuracy on the relationship between counselor experience level and counseling outcome. Data were collected from 48 counselor?Cclient dyads in real-life counseling settings. Empathic accuracy and counseling outcome were assessed by using client perceptions of the first three audiotaped counseling sessions. Ickes?? standard empathic accuracy assessment procedure was used with modifications to assess empathic accuracy. The procedure to assess empathic evaluation included three steps: (a) clients recognize and write down their thoughts and feelings while listening to the audiotapes, (b) counselors infer their client??s thoughts and feelings, (c) The third raters rate the statements of counselors?? empathic accuracy. Correlational analysis revealed that counselor experience level, empathic accuracy, and counseling outcome were positively related to one another. A path analysis was used to test the model that counselor experience level affects counseling outcome through the effect of empathic accuracy. Both paths from counselor experience level to empathic accuracy and from empathic accuracy to counseling outcome were significant, along with a significant mediating effect of empathic accuracy. These results show enhancing empathic accuracy is critical for counseling outcome. Limitations of the current study and suggestions for future research were discussed. 相似文献
40.
Zahide Yildirim Charles M. Reigeluth Seolim Kwon Yuichi Kageto Zihang Shao 《Interactive Learning Environments》2013,21(6):721-736
This study explored the use of several learning management systems (LMS), their benefits, and their limitations in relation to the desired characteristics of an ideal Personalized Integrated Educational System (PIES) for the information age. A qualitative research design was used. The participants of the study were teachers, administrators, and technology coordinators in a small suburban school district. The data were collected through interviews and were subjected to content analysis. The findings of the study indicated that each of the LMSs investigated in this study still has some significant limitations, for none of them provides all the information-age functions of PIES, and what an ideal PIES should possess as information-age functions can be categorized under students’ learning, assessment and system-related preferences. 相似文献