Laboratory medicine in pandemic of COVID-19

After the outbreak in China in the year 2019, severe acute respiratory syndrome Coronavirus 2 (SARS-CoV-2) quickly spread around the world causing a protracted pandemic. Approximately one-third of infections appear to be asymptomatic. Symptomatic disease is characterized primarily by symptoms of respiratory tract infection of varying severity. But Coronavirus Disease 2019 (COVID-19) is much more than an acute respiratory disease because SARS-CoV-2 affects many organs inducing a vast number of symptoms such as cardiovascular, neurological, gastrointestinal, dermatological, with numerous complications. Short and long-term effects of infection, severe ones, and especially mild forms of the disease which affect a huge number of patients need to be further investigated. Laboratory medicine has a crucial role in early diagnosis of the disease, recognition of the patients who need hospital care, and close monitoring of hospitalized patients to timely identify associated clinical complications as well as follow-up of patients with long-term COVID-19.     

无线传感器网络研究

无线传感器网络集成了传感器、微机电系统和网络三大技术而形成的传感器网络是一种全新的信息获取和处理技术,已经成为当今的热门研究领域之一,在国防安全、工农业领域各种控制、城市管理、生物医疗、环境监测、抢险救灾、防恐反恐、危险区域远程控制等许多领域都有重要的科研价值和实用价值,具有十分广阔的应用前景。本文讨论了无线传感器网络的基本概念和一些重要研究领域,并且介绍了无线传感器网络与IPv6的可能的一些契合点,它是无线传感器网络进行大规模就用的重要议题。     

Interleukin-6 polymorphisms modify the risk of periodontitis： a systematic review and meta-analysis

Objective  

To clarify the association of IL-6 polymorphisms and periodontitis, a meta-analysis of case-control studies and a systemic review were conducted.     

QoS技术框架发展的趋势探析

伴随网络技术、多媒体技术的飞速发展,IP网在承载现有WWW、FTP、E-mail等服务的基础上,开始越来越多地承载VoIP以及交互式多媒体通信业务,而每种业务要求的传输时延和抖动等服务参数不尽相同。因此,为用户提供服务质量(QoS)成为Internet发展的重要挑战。网络QoS技术作为公认的新一代网络的核心技术之一,是当前网络研究和开发的热点。IP QoS的研究涉及许多内容,IETF已经提供了许多服务模型与机制来满足QoS需求,典型的有:集成服务(IntServ)/RSVP模型、区分服务(DiffServ)模型、多协议标签交换(MPLS)与流量工程(Traffic Engineering)等,而ITU-T则更偏重于QoS整体框架的制定和IP性能指标体系的构建。此外,MSF(城域网交换论坛)、Internet Ⅱ和IPCablecom也提供了多种的端到端IP QoS解决方案。     

从第九届世界健美操锦标赛看六人项目的发展趋势

采用文献资料法和综合分析法对第九届世界锦标赛竞技健美操六人项目的情况进行分析,并得出六人项目发展趋势是：更加注重艺术性创新、动作技术的完成将更加完美、难度动作向多样化发展。     

肥胖与运动研究进展——慢性炎症反应学说

对解释肥胖的新学说-慢性炎症反应学说进行了简单的介绍,并分析了几种重要的炎症反应标志物(如白细胞介素6、肿瘤坏死因子α等)在机体组织内合成与分泌的规律,同时还简单介绍了慢性炎症反应导致肥胖的可能机制:低氧及对应激的自我保护.另外,运动对肥胖的治疗具有积极作用,简单阐述了运动缓解肥胖的机制:抗炎症反应.     

Long-term endurance training increases serum cathepsin S and decreases IL-6 and hsCRP levels

Cathepsin S (CS) was shown to play a key role in cancer progression, atherosclerosis, heart valve disease, insulin resistance and diabetes mellitus. The present prospective study aimed to investigate the influence of sports on CS, interleukin-6 (Il-6) and high-sensitivity C-reactive protein (hsCRP) levels.

Ninety-eight of 109 participants completed the study. Ergometries were performed at baseline and after 8 months to evaluate/quantify the performance gain. Blood samples were taken at baseline and every 2 months. CS was measured by ELISA (enzyme-linked immunosorbent assay). Compared to the control group (mean performance gain ?3.41 ± 4.62%) we observed a significant physical-activity-induced increase of CS levels (3.45–3.73 ng · ml^?1; P = 0.027) and a significant decrease of Il-6 (2.43–1.91 pg · ml^?1; P = 0.031) and hsCRP-levels (0.11–0.09 mg · dl^?1; P = 0.001) in the intervention group (mean performance gain: 12.13 ± 6.32%). Furthermore, the tendency of the progression was significant for CS and Il-6 (P = 0.002/0.033).

We could show a significant sports-induced decrease of the classic inflammation parameters hsCRP/Il-6, probably expressing a downregulation of permanently prevalent inflammation processes. Simultaneously CS levels increased significantly. Our results show that increasing CS amounts are not simply to equal with an enhanced inflammation status and might even have beneficial effects on inflammation and angiogenesis.     

端到端网络环境下协同办公的应用分析

随着网络技术的发展,在下一代互联网技术和IPv6机制的支持下,网络的速度、质量、安全将得到加强,端到端技术将得到极大地应用。基于端到端技术的协同办公机制顺应扁平化发展趋势,使日常办公打破了时间和空间的限制,大大地提高了工作效率。     

IPComp协议在IPv6协议下应用

IPv6协议下,数据包应用AH或ESP协议使得数据包长度增加,从而导致网络负载增加,数据传输时延增加。本文介绍了使用IPComp在IPv6协议下处理的数据包进行压缩以减小数据包长度的方法。     

校园网安全问题分析与对策

本文首先分析了互联网安全问题的根本原因,接着介绍了校园网安全管理的特点和常见的威胁,然后介绍了当前CERNET安全管理的几项措施,提出了加强校园网安全管理的几项建议,最后介绍了以IPv6为核心的下一代互联网对网络安全的影响。