网络时代大学生网络媒介素养实证研究

网络媒体的迅速发展深刻地改变了当代大学生的成长环境,网络媒介素养成为当代大学生必需具备的重要素养。调查发现,认知能力的有限使得大学生难以甄别网络信息真伪,易出现盲目从众、沉溺网络等非理性行为。各高校应通过开设网络信息认知课程、开展网络道德法规教育和营造良好的校园网络文化提升大学生的网络媒介素养。     

对运动前心血管疾病筛查的综述与探讨

采用文献资料法,回顾了近年来美国、意大利等国家对运动前心血管疾病筛查体系的相关研究。关国普遍采用美国心脏学会推荐的心血管疾病筛查12要素,意大利着重强调了12导联心电图的作用。大量研究证实,心电图确实在疾病筛查方面起到了积极作用。但它需要耗费大量的医疗资源,且费用过高的特性也被人所质疑,因此如何发挥其效用还有待进一步研究与证实。     

紫外线诱变选育高产柠檬酸黑曲霉

为了选育能利用纤维素产酸的黑曲霉,拓展柠檬酸发酵生产的原料。通过紫外线(UV)诱变选育柠檬酸产量提高的菌株,结果表明,紫外诱变获得了一株遗传性能稳定的优良菌株UV-4,产酸为26.77±0.67g/L,与出发菌株相比产酸增幅达50.39%,且UV-4利用稻草纤维素产酸达10.055±0.42 g/L,较出发菌株提高28.04%。     

Tarzan helps to find dyslexics: a pseudo‐word test

A pseudo‐word test called Tarzan will be presented and standard scores for high school‐aged students between 16 and 18 will be suggested. The test uses E. R. Burroughs' text, in which pseudo‐words are added in order to study phonological coding and, through that, possible dyslexia. Girls performed better on the test and their scores correlated well with existing standardised tests. The test is easy and quick to perform and can be a tool for teachers when diagnosing reading problems. However, it cannot be used alone; several and diverse tests are needed.     

The Hong Kong Behaviour Checklist for Primary Students: Developing a brief dyslexia screening measure

The authors report on the development of a brief dyslexia screening measure based on revising the 65-item Hong Kong Behaviour Checklist of Specific Learning Difficulties in Reading and Writing. Teachers’ ratings of 1063 primary students aged 6–14 years on the behaviour checklist provided data for its psychometric evaluation using traditional measurement and Rasch measurement model analyses. Rasch scaling suggested that the revised 36-item checklist could be regarded as a unidimensional scale that assesses global dyslexic dysfunction, and receiver operating characteristics analysis suggested that a score of 18 could be an optimal cut-off score when it is used as a dyslexia screening measure. The validity of this revised checklist was supported by its substantial and significant correlations with external measures of literacy and cognitive skills. Implications of the findings for the use of adaptive testing to provide an effective procedure for screening are discussed.     

高含水原油的破乳剂筛选方法改进——以克拉玛依油田九一区为例

针对克拉玛依油田九一区高含水原油破乳脱水问题进行研究。首先采用《SYT5281—2000原油破乳剂使用性能检测方法（瓶试法）》所述方法对原油破乳剂进行初步筛选,再对脱水率较高的破乳剂用自行设计的试验方法进行筛选,最终选定适合克拉玛依九一区高含水原油用破乳剂。该法对油田开采后期高含水原油的破乳剂筛选具有普遍意义。     

桑枝固体发酵的菌种筛选

用四种不同菌种在野生及栽培桑枝培养基上进行固体发酵,以筛选出最佳发酵菌种,为后续的实验提供理论基础.通过测定菌丝生长长度、生长速度及折干率,选择最佳发酵菌种.经测定,姬松茸为最佳发酵菌种.     

Psychometric Properties of the Caregiver Assessment of Movement Participation Scale for Screening Children with Development Coordination Disorders

Using Rasch analysis, the psychometric properties of a newly developed 35‐item parent‐proxy instrument, the Caregiver Assessment of Movement Participation (CAMP), designed to measure movement participation problems in children with Developmental Coordination Disorder, were examined. The CAMP was administered to 465 school children aged 5–10 years. Thirty of the 35 items were retained as they had acceptable infit and outfit statistics. Item separation (7.48) and child separation (3.16) were good; moreover, the CAMP had excellent reliability (Reliability Index for item = 0.98; Person = 0.91). Principal components analysis of item residuals confirmed the unidimensionality of the instrument. Based on category probability statistics, the original five‐point scale was collapsed into a four‐point scale. The item threshold calibration of the CAMP with the Movement Assessment Battery for Children Test was computed. The results indicated that a CAMP total score of 75 is the optimal cut‐off point for identifying children at risk of movement problems.     

西安地区樱桃病害初步研究

近年来由于西安市农业产业结构的调整,樱桃在该市东郊栽培面积逐渐增加,同时病害的种类和危害程度亦随之增加,尤其是引起芽下发生肿瘤状的一种病害,目前对樱桃的生产已造成巨大的危害.该研究通过对该病害的调查,病原菌的常规分离、初步鉴定及药剂筛选,初步认为病害后期有大量根霉属真菌侵染.     

人才招聘中的信号传递博弈分析

信号传递博弈是一种比较简单而应用相当广泛的不完全信息动态博弈,人才招聘模型是一个典型的信号博弈。在人才招聘过程中,应聘者与用人单位之间可以通过信息的传递来决策各自做出何种选择。在此过程中,在非对称信息的情况下,应聘者在向用人单位提供的信号中有可能有误,容易造成逆向选择问题,这就需要用人单位进行信息甄别。这个信号愈强,成本愈高;能力愈高的人,愈容易发出强的信号。