维生素D3—β—环糊精包合物的制备及鉴定

探讨优化维生素Ｄ３－β－环糊精包合物的制备方法并鉴定其形成。方法：以维生素Ｄ３利用率和收率为综合指标研究了溶液法、胶体磨法、超声波法和研磨法等制备维生素Ｄ３－β－环糊精包合物的方法。结果：当β－环糊精和维生素Ｄ３以３：１摩尔量投料时维生素Ｄ３利用率和收率最高。     

基于WORD2003电子病历数据的追溯统计方法与程序设计

论述了基于WORD2003文件形式存储的电子病历数据追溯与统计的程序设计,通过对WORD2003文件的遍历和读取,实现数据元的匹配,并实现患者与科室文件名称、文件路径和数据元统计信息的对应,便于实现数据信息的追溯。此程序的设计实现,操作较灵活,可以针对WORD2003任意路径、多数据元同时统计,并按格式显示和输出,便于使用者对基于WORD形成的历史病历数据实现二次整理和分析。     

网络环境下教师指导性活动的设计

网络教学为学生的学习提供了丰富的资源，拓延了教学时空的维度，对现有的教学内容、教学手段和教学方法提出了挑战。本文探讨了在此环境下教师指导活动的内容，设计原则及其设计方法等问题。     

数字化口腔种植外科导板的精确度研究

目的 本研究通过分析种植体术前设计和术后的三维位置,来评估数字化口腔种植导板的精确度.方法 根据修复体的生物学功能和美学要求,使用3D种植软件对种植体位置进行设计.将设计的种植导板转化为手术用种植导板,指导47颗种植体植入合适位置.通过重叠术前和术后的CT扫描图像,分析植体肩部和根部的线性误差以及植体长轴的角度误差,比...     

Beyond information access: Support for complex cognitive activities in public health informatics tools

Public health professionals work with a variety of information sources to carry out their everyday activities. In recent years, interactive computational tools have become deeply embedded in such activities. Unlike the early days of computational tool use, the potential of tools nowadays is not limited to simply providing access to information; rather, they can act as powerful mediators of human-information discourse, enabling rich interaction with public health information. If public health informatics tools are designed and used properly, they can facilitate, enhance, and support the performance of complex cognitive activities that are essential to public health informatics, such as problem solving, forecasting, sense-making, and planning. However, the effective design and evaluation of public health informatics tools requires an understanding of the cognitive and perceptual issues pertaining to how humans work and think with information to perform such activities. This paper draws on research that has examined some of the relevant issues, including interaction design, complex cognition, and visual representations, to offer some human-centered design and evaluation considerations for public health informatics tools.     

On revenue maximization for selling multiple independently distributed items

Consider the revenue-maximizing problem in which a single seller wants to sell k different items to a single buyer, who has independently distributed values for the items with additive valuation. The case was completely resolved by Myerson’s classical work in 1981, whereas for larger k the problem has been the subject of much research efforts ever since. Recently, Hart and Nisan analyzed two simple mechanisms: selling the items separately, or selling them as a single bundle. They showed that selling separately guarantees at least a fraction of the optimal revenue; and for identically distributed items, bundling yields at least a fraction of the optimal revenue. In this paper, we prove that selling separately guarantees at least fraction of the optimal revenue, whereas for identically distributed items, bundling yields at least a constant fraction of the optimal revenue. These bounds are tight (up to a constant factor), settling the open questions raised by Hart and Nisan. The results are valid for arbitrary probability distributions without restrictions. Our results also have implications on other interesting issues, such as monotonicity and randomization of selling mechanisms.     

Occupational performance and strategies for managing daily life among the elderly with heart failure

Abstract

Aim: The aim of this study was to describe experiences of limitations in occupational performance and strategies for managing daily activities among the elderly with chronic heart failure (CHF). Methods: Ten participants from primary healthcare with a confirmed diagnosis of CHF were interviewed. The interviews were analysed using qualitative content analysis. Results: The first theme, “Redefining an active life, aware of one’s impaired body”, was based on four sub-themes: realizing one’s limited activity ability; striving to preserve an active life; focusing on meaningful activities; and changing vs. not changing habits and roles. The second theme, “Planning activities and balancing the degree of effort”, was based on three sub-themes: limiting, organizing, and rationalizing activities; adjusting activities to today’s ability; and using technology and adapting the environment. Conclusions: Elderly people with CHF are struggling with an ongoing process of occupational adaptation due to periodical physical decline and fluctuating day-to-day ability. This highlights a need for information on strategies from a holistic perspective and client-centred occupational therapy interventions.     

A pH-triggered delayed-release chronotherapeutic drug delivery system of aceclofenac for effective management of early morning symptoms of rheumatoid arthritis

Abstract

Context: Rheumatoid arthritis (RA) is differentiated as an early morning exacerbation of the core arthritis condition associated with increase in pain and stiffness in joints and necessitate for medication. Objective: The aim of the present work was to develop and optimise a pH-triggered delayed-release colon-specific aceclofenac microspheres and to accomplish chronotherapy of RA. Methods: A 3-factor, 3-level Box–Behnken design (BBD) was used to optimise selected variables. Developed formulation was evaluated for in vivo delayed response and anti-arthritis activity in rats. Results: The particle size and encapsulation efficacy of these microspheres were 117.36?±?10.54?µm and 85.06?±?5.85%, respectively. Optimised formulation was analysed by SEM, DSC, X-RPD and FTIR. The in vivo evaluation reveled delayed anti-inflammatory activity in carrageenan-induced rats and anti-arthritic activity in freund’s adjuvant-induced arthritis rats. Conclusion: The optimised aceclofenac microspheres formulation is potential for the chronotherapy of early morning symptoms of RA.