脚本函数在鼻咽癌在线自适应放疗中的可行性研究

目的利用Pinnacle V9.10计划系统脚本函数,在没有配置动态计划模块的情况下,实现鼻咽癌在线自适应放疗。方法编辑并嵌入脚本函数,借助西门子滑轨CT和IBA Compass三维剂量验证系统,在医生和物理师共同参与下,依次进行一例鼻咽癌放疗计划的移植、靶区和危及器官轮廓的移植和修改、计划评估、新计划的生成和剂量的在线验证。结果利用脚本函数及人工手动操作相结合的方式完成了4个分次的在线自适应放疗,其中计划更新1次。结论脚本函数的应用能够协助放疗工作人员实现在线自适应放疗,但在线计划的重新优化效率和累积剂量的精确评估问题仍需进一步解决。     

组织学与胚胎学慕课的建设和应用

组织学与胚胎学是一门重要的医学基础课程,该课程的理论及实验教学对提高医学生专业技能、培养学生综合性思维具有重要意义。为弥补传统课堂教学时空的局限性,提供学生在课堂学习以外的自学和复习工具,更有利于牢固掌握组织学与胚胎学的相关知识,为继续学习后续基础医学课程和临床课程打下坚实的基础,教研室基于慕课教学平台加强组织学与胚胎学课程建设,通过开展组织学与胚胎学慕课教学,旨在全面提升组织学与胚胎学教学质量,对培养创新型医学人才具有重要的意义。     

One hertz repetitive transcranial magnetic stimulation over dorsal premotor cortex enhances offline motor memory consolidation for sequence‐specific implicit learning

Consolidation of motor memories associated with skilled practice can occur both online, concurrent with practice, and offline, after practice has ended. The current study investigated the role of dorsal premotor cortex (PMd) in early offline motor memory consolidation of implicit sequence‐specific learning. Thirty‐three participants were assigned to one of three groups of repetitive transcranial magnetic stimulation (rTMS) over left PMd (5 Hz, 1 Hz or control) immediately following practice of a novel continuous tracking task. There was no additional practice following rTMS. This procedure was repeated for 4 days. The continuous tracking task contained a repeated sequence that could be learned implicitly and random sequences that could not. On a separate fifth day, a retention test was performed to assess implicit sequence‐specific motor learning of the task. Tracking error was decreased for the group who received 1 Hz rTMS over the PMd during the early consolidation period immediately following practice compared with control or 5 Hz rTMS. Enhanced sequence‐specific learning with 1 Hz rTMS following practice was due to greater offline consolidation, not differences in online learning between the groups within practice days. A follow‐up experiment revealed that stimulation of PMd following practice did not differentially change motor cortical excitability, suggesting that changes in offline consolidation can be largely attributed to stimulation‐induced changes in PMd. These findings support a differential role for the PMd in support of online and offline sequence‐specific learning of a visuomotor task and offer converging evidence for competing memory systems.     

Cyberspace Betrayal: Attachment in an Era of Virtual Connection

Electronic technology has yielded new forms of relationship bonding as well as unique aspects of betrayal and ruptures in attachment. Four key characteristics of betrayal that differentiate online from offline experience will be identified. The inherent ambiguities in defining online sexual infidelity will point to a need to professionally define the parameters of internet betrayal in light of the ever expanding electronic revolution.     

波浪式生物反应器温度控制系统模糊PID算法设计及simulink仿真

目的：设计一种波浪式生物反应器温度控制策略。方法根据波浪式生物反应器温度控制精度及响应速度要求,将传统的比例积分微分（ PID）控制方法与模糊控制方法结合,利用模糊控制方法实时在线调节PID控制的参数,增强温度控制策略对温度的调节性能。结果设计出模糊PID控制器,并与传统PID控制器进行仿真比较。结论模糊PID控制法较传统PID控制法有较小的超调以及较短的稳定时间,说明模糊PID控制具有更高的温度控制调节性能。     

The Internet and lifestyle drugs: an analysis of demographic characteristics,methods, and motives of online purchasers of illicit lifestyle drugs in the Netherlands

Abstract

Aims: The Internet has marked a revolution in the supply of illegal drugs, while at the same time, new types of illegal and semilegal drugs increasingly are becoming available. In order to deepen our understanding of the demand and supply of these new drugs on the Internet, this study focuses on the demographic characteristics, methods and preferences of people who purchase ‘lifestyle drugs’ through the surface web.

Methods: Data were obtained through the following two surveys: a prevalence study of 50,848 Dutch respondents and an in-depth study of 153 people who have purchased lifestyle drugs online.

Findings: At least 10.2% of the Dutch adult population has bought medicines online; the majority being lifestyle drugs (5.2%). In addition, an estimated 1.6% of the Dutch population has purchased medicines illicitly, with the majority of products concerning lifestyle drugs (0.9%). Illicit lifestyle drugs are primarily purchased through e-commerce sites and online pharmacies, and users report high satisfaction rates.

Conclusion: Purchasing lifestyle drugs is characterised by specific online dynamics, as the drugs are often openly accessible and the boundaries between legal and illegal sale blurred. As new types of drugs become available, it is important to further monitor customers’ preferences and experiences.     

在线固相萃取-高效液相色谱法测定血清中的茶碱

目的:建立一个准确、简单、快速的分析人血清中茶碱含量的方法,并应用于临床治疗药物监测。方法:利用双三元液相色谱系统(Ulimate3000系列),经C₁₈MG S-3(20 mm×4.0mm,A3JW)固相萃取柱进行在线固相萃取,使用Acclaim C₁₈(150 mm×4.6 mm,5μm)进行分离,梯度洗脱,检测波长273 nm,柱温30℃。结果:利用在线固相萃取液相色谱法测定血清中茶碱的方法检出限为0.10 mg·L^-1,定量限为0.35 mg·L^-1;线性范围为0.35~20 mg·L^-1,R^2=0.999 8;当加标浓度范围为0.35~10 mg·L^-1时,回收率范围为97.28%~103.1%,RSD为0.52%~1.72%。结论:本方法简便、快速,可用于血清中茶碱的临床血药浓度监测及药动学研究。     

互联网药品交易服务状况调查分析

目的：对国内互联网药品交易服务状况进行调查分析,为运用现代手段创新药品交易服务模式提供参考。方法：通过CFDA网站,统计截至2017年上半年我国互联网药品交易服务的构成和分类情况;以获得A类资格证书的第三方交易服务平台为样本,逐家登陆平台网站,对其平台建设与服务方式、内容和网站质量进行评价分析。结果：调查结果显示,截至2017年6月底,全国取得互联网药品交易服务资格证书的共913家,是2014年的2.7倍;其中第三方交易服务平台40家（4.3%）,与2014年相比新增1.7倍;该类平台交易服务形式包括供采易-供应链B2B（复选率100%）、医药B2B （复选率100%）、B2C全渠道平台（复选率100%）、医药智能物流平台（复选率82.5%）、跨境商城（复选率80.0%）、O2O电商系统（复选率75.0%）等;平台在支付/配送、售后服务、交易监管等方面均有相应栏目支撑;平台登录便捷程度评价优秀的75.0%,信息更新频率评价优秀的60.0%。结论：调查分析结果说明,我国互联网药品交易服务发展较为迅速,服务形式、内容和网站质量整体趋好,但各省份间开展程度还存在较大的差异,需进行引导推进。     

‘To the horror of experts’: reading beneath scholarship on pro-ana online communities

Pro-ana online communities in which people share their experiences of eating disorders have attracted concern among scholars and health practitioners because of fears about their potential to encourage disordered eating. This article draws upon concepts from feminist psychoanalysis to ‘read beneath’ a selection of scholarly work on pro-ana communities and consider the implications of this reading for theory and practice in public health. In particular, we draw upon Julia Kristeva’s work to ‘uncover’ how sections of the academy have attempted to manage the horror inherent in the abject in relation to pro-ana. To support our reading we also draw upon critical feminist and sociocultural research on pro-ana, critical public health scholarship and the Foucauldian notion of ‘care of the self’. In accordance with our intent to overcome dichotomous thinking we locate our approach in the context of cultural studies of psychiatry, which is concerned less with clarity and non-contradiction than it is with the social, cultural and political relations of psychiatric knowledge production. This orientation is suited to capturing pro-ana’s complex relationship with medical/psychiatric authority and the nuanced subjectivities of those who participate in such communities. We invite public health scholars and practitioners to appreciate a way of engaging with pro-ana communities that is geared less towards the impetus to control, censor or clinically intervene and more towards understanding them as sites through which individuals living with eating disorders can be in the world, and that both reveal and help us understand the centrality of ambiguity and contradiction to subjectivity.