Attracting solutions in crowdsourcing contests: The role of knowledge distance,identity disclosure,and seeker status

We investigate in the context of crowdsourcing how seekers can increase open innovation performance, measured as received solver attention, by making two strategic decisions: selecting innovation tasks that are well suited for crowdsourcing and choosing between the potentials of status signalling through identity disclosure versus enjoying the benefits of anonymity. Drawing on uncertainty reduction theory, we suggest that a well-articulated problem statement reduces uncertainties of potential solvers and increases their willingness to participate. We argue that the ability of seekers to draft high-quality problem statements depends on the distance between the problem domain and their current knowledge stock. An analysis of 637 crowdsourcing projects finds that problem-seeker knowledge distance and received solver attention are curvilinear related such that moderate levels of knowledge distance maximize solver participation. However, high-status seekers who engage in identity-based status signalling are able to benefit from crowdsourcing across all levels of problem-seeker knowledge distance.     

Influence of the difficulty of the Matching Familiar Figures Test-20 on the assessment of reflection–impulsivity: An item analysis

This study is an item analysis of the Matching Familiar Figures Test-20. We examined error scores in the Matching Familiar Figures Test-20 to determine the influence of the difficulty of the test on the assessment of reflection–impulsivity. The sample included 700 participants aged between 6 and 12 years. The results obtained from the corrected item–total correlation showed moderate but significant values for the discrimination index in all age groups, although the lowest values were found in the 6-year-old group. The item difficulty data show that the test is quite difficult for 6-year-old participants and quite easy for 12-year-old participants, and more likely to show individual differences between these ages. The results suggest that the difficulty of the MFFT20 is appropriate for children between 6 and 12 years. However, because of some floor and ceiling effects, the results of this test for ages 6 and 12 should be interpreted very cautiously, especially for the 6-year-old group.     

民国时期福建私塾改良述论

20世纪初叶,福建省顺应形势要求实施私塾改良,出台了一系列章程和法规,从教学方法、教学内容、教学环境、教师素质等方面对私塾改良提出了详细而又严格的规定,致使私塾改良有章可依。这个时期福建私塾改良取得了一定成效,但也存在一些问题。     

长尾理论给网络出版带来的启示

作为对我们所熟知的“80／20法则”的悖反或补充,“长尾理论”被《商业周刊》评为2005年度最有商业价值的概念之一。该理论认为,运用信息技术可消除传统商业世界的很多约束,以至于需求不旺或销售不佳的产品共同占据的市场份额,可以和那些数量不多的热卖品占据的市场份额相匹敌甚至更大。长尾理论作为网络商业的一个新的理论基础,为网络出版的发展带来启示。     

基于恒温炉智能模糊PID控制器设计

本文设计了恒温炉控制系统,恒温控制系统主要由单片机控制与PID控制器实现电热炉自动加热并维持一个恒定值.系统由AT89C51为主的几个模块组成.其中晶体振荡电路主要是向AT89C51提供基准时钟,信号源由DS18B20温度传感芯片提供,键盘设定炉温期望值,单片机输出信号控制开关,实现电热炉加热,并附有显示.     

二十世纪后期二胡音乐创作的四种样式

二胡音乐创作在二十世纪后期进入繁荣时期,这种繁荣格局的出现主观上是因为大量专业作曲家加盟创作,客观上则是多元化创作技法的发展,即传统创作样式、现代创作样式、中和创作样式和移植创作样式.四种不同的创作样式有着各自具体内涵、艺术特征和意义.各具特色的多元创作样式不仅促使二胡音乐作品的百花齐放,也促进了二胡艺术的整体发展.     

第三届全国青年史学工作者学术会议综述

第三届全国青年史学工作者学术会议是世纪之交全国青年史学工作者的盛会。会上，代表们就20世纪中国史学回顾、21世纪中国史学走向、历史学的定位及功能等问题展开了热烈地讨论，精彩纷呈。与会学者在中国古代史、中国近现代史、世界史等领域的一些专门问题上也发表了饱含深邃智慧的见解。     

酒神精神与20世纪中国文学的革命叙事

酒神精神对20世纪中国文学颇有影响,尤其与革命文学叙事纠缠甚深。在革命叙事中,酒神式强力意志与生命的酒神状态均得到表现。由于革命意识形态与酒神精神的价值诉求不同,革命叙事充分改造了酒神精神。但革命意识形态推向极端时,酒神精神将从其非理性一面喷薄而出。     

论20世纪中国公共精神的复兴和重建

20世纪中国公共精神复兴和重建的主体是中国共产党。在复兴和重建过程中，中国共产党正确处理了公共精神指导思想的定位，公共领域的开拓与公共精神的启蒙，公共精神与集体主义精神和公共精神与共同理想等等的关系；并且能够站在探讨执政之基的高度，用“三个代表”的重要思想对公共精神进行新的整合，使公共精神同“主旋律”相互作用，逐渐向公共权力领域渗透，从而为培育公共行政的现代观念，真正实现执政为民提供了强有力的精神支持。     

核磁共振成像技术教学实验研究

为了克服现有核磁共振成像实验仪不能很好地满足直观实验教学需要之不足,同时为小样品小范围测试进行科学研究提供方便,并为教学单位提供价格相对低廉的产品.利用核磁共振成像的基本原理,采用NMI20型台式核磁共振成像仪,研究如何开展核磁共振成像技术教学实验问题.开发了涉及共振频率、脉冲序列、相位编码、加权成像、射频功放等内容的26个实验.作为教学实验设备,该成像仪备具有直观的界面以及成像过程的开放性,能使学生深入掌握核磁共振的原理、结构及其硬件系统,教学效果良好.