多媒体网络教学常见误区与对策探析

随着信息技术在职业教育的普及。越来越多的高职院校教师开展多媒体网络教学。文章提出了教师开展多媒体网络教学存在的种种误区及对策,以期为高职院校教师提供警示和借鉴。     

小科学与大科学关系视角下的美国科学

在小科学与大科学关系的视角下,美国科学的社会建制是以小科学为基础、以大科学项目为核心的大科学建制,是经历长期演进、历史地形成的;科研模式具有"自主推动"、"主体多元、高校主导"等特点;能够根据情况的变化进行适当地调整。对现阶段的中国来说,在从传统向现代的赶超中,科学目标相对明确,应发挥"中国特色",大力发展大科学,发挥其带动、提升全局的功能;与此同时,在赶超途中,尤其在接近科学前沿之时,应着力培育并完善广泛的不同领域不同层次的小科学产生、发展的健康氛围,提升并扩展小科学的基础地位,为中国科学提供"涨落"、提供新的分岔点和增长点。     

《视频制作与处理》课程融入视觉素养培养的探讨

文章分析视觉素养的内涵,尝试通过《视频制作与处理》这一课程进行行动研究,实现理论与实践、技术与艺术的有效融合,让学生在领略数字视频制作魅力的同时,培养和提升学生的视觉素养。     

浅议淮河流域的思想文化特性

淮河流域融合了地区文化的要素,凝结成古文化多元性。涵盖商周时代的东夷（包括淮夷）文化、老庄文化、荆楚文化、吴越文化、中原文化、淮扬文化;以楚、明文化为底蕴,兼容中原文化,以水为本体,衍生出民为邦本、有教无类、无为而治的淮河文化,以安时守顺为思维底蕴,形成吸附、融合、隐性为底色特征。     

Satisfactory clinical outcome following delayed repositioning of a traumatic post-LASIK flap with dislocation and shrinkage managed by irrigation,stretching, and debridement

Objective

To report surgical management and favorable outcome in a case with delayed repair of traumatic laser in situ keratomileusis (LASIK) flap dislocation with shrinkage and folds.

Methods

A 30-year-old man with a five-year history of bilateral LASIK experienced blunt trauma to his right eye followed by decreased vision for 5 weeks. The surgical management included initially softening the flap by irrigation with balanced salt solution (BSS). The shrinkage folds were carefully and gently stretched by scraping with a 26-gauge cannula accompanied by BSS irrigation. All of the epithelial ingrowth on the flap inner surface and on the bed was thoroughly debrided by scraping and irrigation. After the flap was repositioned to match its original margin, a soft bandage contact lens was placed.

Results

At his initial visit, slit-lamp microscopy and optical coherence tomography (OCT) showed shrinkage of the LASIK flap with an elevated margin approximately 3 mm above the original position. The flap covered half of the pupil and had multiple horizontal folds. Two months after surgery, the flap remained well positioned with only faint streaks in the anterior stroma. The uncorrected visual acuity of the right eye was 20/20 with a manifest refraction of Plano.

Conclusions

For delayed repair of traumatically dislocated LASIK flaps, sufficient softening by BSS, stretching the shrinkage folds, and thorough debridement of ingrowth epithelium enable resetting the flap and provide satisfactory results.

     

Changes of tear film and tear secretion after phacoemulsification in diabetic patients

Objective: To evaluate tear film stability and tear secretion in patients with diabetes after phacoemulsification. Methods: Twenty-five diabetic cataract patients and 20 age-matched non-diabetic cataract patients as control underwent phacoemulsification. Tear film break-up time (TFBUT), Schirmer I test (SIT), corneal fluorescein staining, and dry eye symptoms were measured pre- and postoperatively. Results: Diabetics had a decreased preoperative TFBUT and SIT. TFBUT was reduced on Day 1 and recovered on Day 180 postoperatively in both groups. SIT was increased after phacoemulsification, but returned to preoperative levels by Day 180 in non-diabetics, whereas it was lower than preoperative level in diabetics. Positive corneal fluorescein staining was elevated in both groups, and returned to preoperative levels only in controls. Dry eye symptoms were similar to fluorescein staining in both groups. Conclusion: Tear secretion was reduced in diabetic cataract patients after phacoemulsification, which worsened dry eye symptoms and predisposed those patients to ocular damage.     

Assessments of tear meniscus height,tear film thickness,and corneal epithelial thickness after deep anterior lamellar keratoplasty

Objective

To assess the lower tear meniscus height (LTMH), central tear film thickness (CTFT), and central corneal epithelial thickness (CCET) after deep anterior lamellar keratoplasty (DALK).

Methods

This was a retrospective cross-sectional study of 20 patients who had DALK in one eye over a three-month period. LTMH, CTFT, and CCET of the operated eyes and the unoperated fellow eyes were measured using high-definition optical coherence tomography (HD-OCT). Correlations between three OCT assessments and age, time following surgery, graft size, bed size, and the number of residual sutures were analyzed.

Results

Compared to patients with keratoconus, patients with other corneal conditions had significantly higher CCET in the fellow eye (P=0.024). For all patients, CCET in the operated eye was significantly negatively correlated with the number of residual sutures (R=?0.579, P=0.008), and was significantly positively correlated with time following surgery (R=0.636, P=0.003). In the fellow eye, a significant positive correlation was found between age and CCET (R=0.551, P=0.012), and a significant negative correlation between age and CTFT (R=?0.491, P=0.028). LTMH was found to be significantly correlated between operated and fellow eyes (R=0.554, P=0.011). There was no significant correlation between LTMH and age, bed/graft size, time following surgery, or residual sutures (all possible correlations, P>0.05).

Conclusions

Patients with keratoconus tend to have a thinner central corneal epithelium. Corneal epithelium keeps regenerating over time after DALK. DALK did not induce a significant change in tear volume compared with the fellow eye. Postoperative tear function might depend on an individual’s general condition, rather than on age, gender, bed/graft size, time following surgery, or residual sutures.

     

试探基于大学生就业的校友资源的开发与利用

校友资源是高校建设和发展中重要的物质资源和精神资源。合理有效地开发和利用校友资源,对大学生就业来说具有品牌示范、就业指导、就业服务和资金支持等方面的作用。为拓宽大学生就业渠道,提高毕业生就业工作水平,应进一步加强高校校友资源的开发和利用。     

网络多媒体课件的设计与实现

网络多媒体课件是课件开发的发展方向,是现代教育技术研究的一个重要领域。本文基于网络多媒体课件的基本特征,从设计思路、开发环境、主要功能、功能模块结构图及几个主要关键技术等方面对网络多媒体课件进行了阐述,最后对网络多媒体课件的设计进行了总结。     

模袋混凝土的施工工艺与质量监控

模袋混凝土作为新型的水利、港口码头工程的水下防护材料，具有很多优点。其施工流程为：原材料准备与检验、清基整理、铺设锚固模袋布、充灌混凝土、表面清理。施工质量要重点做好地基密实平整、混凝土的配合比、充灌饱满度等几个关键环节的监控。