More is not always better: Effects of collaboration breadth and depth on radical and incremental innovation performance at the project level     

Sebastian Kobarg  Jutta Stumpf-Wollersheim  Isabell M. Welpe 《Research Policy》2019,48(1):1-10

This study investigates the effect of project-level collaboration breadth (i.e., the number of collaboration partner types) and collaboration depth (i.e., the intensity of the interactions with these partners) on the incremental and radical innovation performance of innovation projects. The econometric analyses, based on a Community Innovation Study sample of 218 innovation projects conducted in German manufacturing companies, reveal inverted U-shaped relationships between collaboration breadth and radical innovation performance and between collaboration depth and incremental innovation performance. These curvilinear effects speak to the high sensitivity of innovation projects to the extent of collaborative activity, which implies that practitioners should exert caution in managing collaborative innovation projects. This study contributes to the understanding of project-level open innovation and to the overall understanding of the performance effects of innovation collaboration, which, following recent assertions in the literature, could be flawed by analyses conducted at the organizational level.  相似文献   

基于FMS的实时视频答疑系统的设计与实现     

刘辉 《广东广播电视大学学报》2008,17(6):103-106

目前,网络教育中的视频答疑系统在使用时,需安装相应的客户端软件或插件,给学习时间、场所不固定的学习者带来不便。本文采用FLV流媒体格式,设计与实现了基于Flash Media Server的实时视频答疑系统,取得了较好的应有效果。  相似文献   

Examining emic viewpoints on a pedagogical development program’s long-term effects using Q methodology     

《Studies in Educational Evaluation》2021

To examine the long-term effects of pedagogical development, the study explored 56 Chinese university instructors’ viewpoints on their professional agency in implementing new pedagogical practices following a PBL program in Denmark. Q methodology was supplemented by a post-sorting survey and post-analysis interviews. An eight-factor solution emerged, indicating a high variation in participants’ subjective experiences of PBL implementation. Their perceived sources for agency enactment are both internal and external, crossing three phases in practice – readiness, implementation, and prospects. Despite suggesting positive long-term PD effects, the study also illustrates how university instructors’ agency enactment is constrained by contextual aspects, including a lack of surrounding acceptance and support. Practical implementations how PD programs may support long-term teacher learning through agency development are provided.  相似文献   

贵州卷柏属(卷柏科)一新种——习水卷柏     

苟光前  王培善 《中国科学院研究生院学报》2005,1(8):71-72

描述了贵州卷柏属一新种,即习水卷柏Selaginella xishuiensis G. Q. Gou & P. S. Wang。新种与蔓出卷柏S. davidii Franch.在体态和大小方面相近,但叶缘具睫状毛而不同;新种在体态上也与地卷柏S. prostrata H. S. Kung相似,但孢子叶一型而不同。  相似文献   

"云娜"台风暴雨的Q矢量与螺旋度诊断分析   总被引：5，自引：0，他引：5  

朱健  沈晓玲 《科技通报》2007,23(1):22-27

利用非地转ω方程说明了Q矢量散度的物理意义,并通过计算台风“云娜”影响过程中的Q矢量散度和高低空螺旋度,分析了这两个物理量的演变特征及其与台风、台风暴雨的关系,指出低层等压面上Q矢量散度场及相对螺旋度对台风暴雨预报具有较好的参考价值。  相似文献   

阿Q:革命与反革命的悖谬     

王涘海 《邵阳学院学报(社会科学版)》2004,3(6):73-75

阿Q革命问题是阿Q典型中的一个关键问题。阿Q是一个革命与反革命的矛盾体，他具有强烈的朴素的革命的愿望，但是他同时又走向了革命的反面，阿Q的悲剧是一个社会悲剧、思想悲剧、性格悲剧。  相似文献   

气动机械手控制实验系统设计     

《实验室研究与探索》2017,(11):77-81

利用TMS320VC5509A和EP2C8Q208设计实现了一个气动机械手实验控制系统,通过DSP C和FPGA Verilog HDL语言编程取代了体积庞大的PLC控制系统,实现了20路电磁换向阀控制。16路10 bit DAC精确控制比例阀电压从而控制气动机械手指的动作力度,利用8路10 bit ADC采集指端触感压力传感器压力信号并且完成波形显示,提供机械手指的握力反馈信息,提高了机械手的控制精度和控制速度。  相似文献   

Barriers to environmental education: How do teachers’ perceptions in rural Ecuador fit into a global analysis?     

Chloe Anderson  Susan Jacobson 《Environmental Education Research》2018,24(12):1684-1696

Abstract

We identified 48 barriers to teaching environmental education reported by teachers in global literature and compared frequency to empirical data we collected from rural Ecuador, part of an understudied region and continent. We utilized Q methodology and interviews with 25 (78%) teachers at 6 schools to identify and categorize barriers. Perceptions of barriers ranked by Ecuadorian teachers were statistically classified into three factors: logistical (associated with fieldtrips, time, and money); training and lack of government support; and attitudinal (associated with student disinterest). In contrast, barriers related to student testing and controversial topics were only reported in more developed countries. Results enable region-specific recommendations.  相似文献   

Investigating Student Perceptions of a Dissection-Based Undergraduate Gross Anatomy Course Using Q Methodology     

Jessica N. Byram  Jason M. Organ  Michael Yard  Naomi A. Schmalz 《Anatomical sciences education》2020,13(2):149-157

The demand for upper-level undergraduate dissection-based anatomy courses is growing, as professional programs require more advanced anatomy training prior to matriculation. To address this need, Indiana University School of Medicine (IUSM) partnered with Indiana University-Purdue University Indianapolis—a large, urban, life science-focused campus nearby to IUSM—to offer an undergraduate, dissection-based course in regional gross anatomy. Because this is a new course, a deeper post-course evaluation of student perceptions was conducted using Q methodology. In this study, Q methodology was used to evaluate student views of the overall course structure, pre-laboratory materials and activities, assessments, and quality of instruction. Of the 15 students in the spring semester 2018 cohort, 80% (n = 12) participated in the evaluation, and 10 of those students followed up with written explanations for their rationale in selecting the four statements with which they most strongly agreed and disagreed. The Q methodology sorted the students into one of three statistically significant groups: Motivated Dissectors (n = 6), Traditional Students (n = 3), and Inspired Learners (n = 3). Motivated Dissectors and Inspired Learners felt strongly that the course did not encourage self-directed learning and that the pre-laboratory materials were not adequate to prepare them for quizzes. Traditional Students, however, disagreed, having a favorable opinion of the pre-laboratory materials, even though this group felt most strongly that the amount of material covered in the course was overwhelming. This study demonstrates the utility of Q methodology to evaluate courses to elucidate student perspectives and inform future course modifications.  相似文献   

WINDOWS平台下802.1Q协议仿真     

唐俊勇 《黑龙江科技信息》2010,(21):82-82,90

从802.1Q协议的工作原理、收发数据帧触发条件、规则动作和所涉及的协议格式出发,分析了基于Windows平台建立该协议的功能需求和特点,利用其工作原理实现了虚拟局域网（VLAN）模块。探讨了仿真开发中的关键技术,通过仿真模块的工作规律,提出了VLAN管理与规划的建设策略。  相似文献