康卡斯特诉FCC案再思考

本文对康卡斯特诉FCC案进行了梳理,分析了上诉法院的判决依据。从传媒经营的角度来看,传媒企业具有两重性:政治属性和经济属性。这要求对于与传媒有关的判例,既要照顾到传媒企业的盈利动机,又不能妨碍传媒肩负表达自由的社会功能。网络中立原则并不能兼顾两个属性,所以不适合做强制性立法。     

信息技术革命背景下馆藏文献的供求矛盾分析

本文从经费、利用率、服务理念、等方面分析了馆藏文献建设过程中供给与需求间存在的结构性矛盾,并建议从准确把握读者需求与馆藏品质关系、正确处理馆藏文献数量、质量和结构的关系、提高文献资源的利用率、多样化配置文献资源载体、不断提高图书馆管理与服务人员专业素质等方面求解这一结构性矛盾。     

Modeling the impact of wilderness orientation programs on first-year academic success and life purpose

Wilderness orientation programs (WOPs) are becoming a popular method of encouraging college student retention and success. Previous studies have identified outcomes and correlates of participation in these programs, but a cohesive model of impact is lacking. The purpose of this study was to assess the impact of WOPs on first-year student success and sense of purpose. A secondary aim was to elucidate predictors and correlates of WOPs identified in previous research. Participants included 295 students at a liberal arts college. Results indicate that WOP participants demonstrated higher levels of first-semester social engagement and reflection, thus leading to higher grade point average, better retention and a higher sense of life purpose. WOP participation, however, had a negative direct influence on sense of purpose. These findings are discussed in light of previous research, presenting a preliminary model of WOP influence on first-year academic success.     

高职“进出口单据操作”课程的教学现状分析及建议

＂进出口单据操作＂课程的学习对于高职院校商务英语专业和国际贸易专业的毕业生从事进出口相关工作具有十分重要的意义。针对目前高职单证课程教学现状及问题,结合单据操作业务实际和高职教育特点,对＂进出口单据操作＂的教学提出一些看法和建议,以期改进课程的教学效果,提高教学质量。     

第18届篮球世界杯16强球队的攻防实力评价

目的了解当今世界篮坛的竞争格局及各队的整体实力,为我国竞技篮球发展提供参考。方法运用文献资料法、录像观察法、TOPSIS法、RSR法等对第18届篮球世界杯16强球队的攻防技战术指标进行分析。结果与结论1)在进攻方面,塞尔维亚、美国2队的进攻进攻能力较强(>0.67);在防守方面,澳大利亚、阿根廷、美国、西班牙4队的防守能力较强(>0.719)。2)在攻防综合能力方面,根据RSR值的大小可以将16支球队划分为5档。3)在进攻指标上,得分、助攻、投篮命中率、三分命中数、被侵犯5项指标在不同档次球队间存在极显著性差异(p<0.01),进攻篮板、投篮命中数、三分命中率3项指标在不同档次球队间存在显著性差异(p<0.05)。4)在防守指标上,防守篮板、个人犯规、防守犯规3项指标在不同档次球队间存在显著性差异(p<0.05)。     

校外教育与学校教育资源共享与互补机制研究——来自北京、昆明与满洲里三城市的深度访谈报告

加强校外教育机构与中小学校的合作,促进校内外教育资源的共享与互补.形成强有力的教育合力,是未成年人健康发展的需要.深度访谈表明,我国校外教育机构与中小学校的合作取得了初步成效,但还存在不少问题.文章在分析了影响校外教育与学校教育资源共享与互补的主要因素的基础上,提出了问题解决的对策与建议.     

Performance of a single-stage Linde-Hampson refrigerator operating with binary refrigerants at the temperature level of-60 ℃＊

The optimization of the performance of a single-stage Linde-Hampson refrigerator （LHR） operating with six different binary refrigerants （R23/R134a, R23/R227ea, R23/R236ea, R170/R290, R170/R600a and R170/R600） with ozone depletion potentials （ODPs） of zero was conducted using a new approach at the temperature level of-60℃. Among these binary refrig- erants, the 0.55 and the 0.6 mole fractions of R23 for R23/R236ea are the most prospective nonflammable ones for the medium and low suction pressure compressors, respectively. For these two kinds of compressors, the 0.6 and the 0.65 mole fractions of R170 for R 170/R600, respectively, are the most prospective binary refrigerants with low global warming potentials （GWPs）. The results of optimization of pressure levels indicate that the optimum low pressure value for coefficients of performance （COP） is achieved when the minimum temperature differences occur at both the hot and the cold ends of the recuperator at a specified composition and pressure ratio. Two useful new parameters, the entropy production per unit heat recuperated and the ratio of heat recuperating capacity to the power consumption of the compression, were introduced to analyze the exergy loss ratio in the recuperator. The new approach employed in this paper also suggests a promising application even to the optimization of the performance with multi-component refrigerants.     

Influence of baffle position on liquid sloshing during braking and turning of a tank truck

The influence of baffle position on liquid sloshing during the braking and turning of a tank truck was studied using a volume of fluid (VOF) model. The forces,their positions and weight distribution during braking and the forces and rolling moment during turning were calculated. The reliability of the calculation method was validated by comparisons with experimental results. The results showed that during braking,liquid splashes in the tank and the maximum forces and G (the ratio of weight acting on the front axle to the rear axle) are large when A (the ratio of the arch area above the baffle to the area of cross section)≤0.1. When A≥0.2,as the position of the baffle is lowered,the maximum of Fx (the force in direction x) first decreases then increases,and the maximum of Fy (the force in direction y) and G increase. During turning,liquid splashes in the tank and the maximum forces and M (the rolling moment) are large when D (the ratio of the arch area above the baffle to the area of cross section)≤0.2. When D≥0.3,as the position of the baffle is lowered,the maximums of Fy,Fz (the force in direction z) and M increase.     

交易成本的处理:补偿与降低

交易完成前除生产成本之外的所有成本都可界定为交易成本,即成本模型中总成本等于生产成本与交易成本之和.对交易成本处理主要有补偿与降低两种方式.在不同的市场结构和不同的市场定价法下,交易成本通过价格机制补偿的程度不一,在成本加成定价无法实现的情况下,交易成本的处理就从补偿转向了降低.通过制度规范、重复博弈和适度规模是厂商降低交易成本的一般措施.     

Chinese perceptions of the interface between school and museum education

The current political and social backdrop in China that is characterized by rapid educational reforms to the K-12 education system, rapid growth in the number of science museum institutions, and Central Government policy which encourages collaboration between museums and school has the potential to be fertile ground for meaningful engagement between museums and schools. Notwithstanding, the Chinese K-12 education system generally does not utilize museum resources to support the curriculum, as is common in Western countries. This hermeneutic phenomenographic study elucidates the current Chinese views and perceptions among three stakeholders—school teachers, museum staffs and science educators—around this collaborative concept. The outcomes demonstrate that strongly entrenched cultural views and long-standing practices among stakeholder groups are obstacles to meaningful collaboration despite Central Government policy which encourages such engagement. The cultural values and perceptual views of stakeholder groups were discerned with the purpose of promoting mutual understandings and ultimately enabling meaningful collaboration in support of K-12 education in China.