关键词： CRNA   Distraction   Informatics   Mobile computing device   Vigilance  

摘要： The use of mobile computing devices (MCDs) such as smartphones, tablet computers, and laptops among Certified Registered Nurse Anesthetists (CRNAs) in the clinical area may provide benefits as well as pose risks. Limited research is available on the use of MCDs in the practice of nurse anesthesia. The purpose of this study was to answer the following questions: (1) What are the clinical and nonclinical uses of mobile computing devices among Michigan CRNAs? and (2) What are the experiences of Michigan CRNAs with regard to the impact of using these devices on patient care? A descriptive survey design was used to answer the research questions. Findings from the study reveal that CRNAs believe there are many important benefits as well as major risks associated with using MCDs while providing direct patient care. In addition, some respondents either personally experienced or witnessed incidents of distraction, performance declines, or serious anesthesia events as the result of MCD use during patient care. This study elucidates the need for the development and adoption of policies that promote safe, appropriate, patient-centered use of MCDs for the specialty of nurse anesthesia. © 2018 AANA Publishing Inc. All rights reserved.

关键词： Trust-based routing protocol   Pervasive and mobile computing   Secure routing protocols   Device-to-device communication   Wireless mobile networks  

摘要： In the blooming era of Pervasive and Mobile Computing, trust has been accepted as a vital factor for provisioning secure, reliable and seamless communications between pervasive computing elements. However, advancing research in the area of trust-based protocol for distributed Pervasive and Mobile Computing might be challenging due to the ambiguity of the concept of trust as well as the variety of divergent trust models, protocols and algorithms in different contexts. In this research, we augment the trust concept and definition from various field of studies and proposed models in the literature and provide general conceptual phases and methods of trust management toward-trust-based protocols, in the context of Pervasive and Mobile Computing. The paper addresses a broad range of techniques, methods, models, applications and desired futures of trust-based protocols. A number of the currently used trust-based protocols are critically reviewed, and this further leads our discussion to the security attacks and mitigation strategies used with trust-based protocols for pervasive and mobile computing. Finally, the paper discusses open research issues. (C) 2018 Elsevier B.V. All rights reserved.

关键词： Fragmentation   Molecules   Basis sets   Chemical calculations   Nuclear magnetic resonance spectroscopy  

摘要： NMR is a powerful tool for obtaining information on the structural characterization and dynamics of proteins, and nucleic acids, and their complexes. The complexity of the spectra is such that elucidation through computational simulation is a much desired thing. However, the size of most structures of interest is such that they remain out of reach of accurate quantum chemical techniques. Fragmentation methods have been shown to be a viable means of reducing the cost of ab initio calculations to enable the prediction of molecular properties of large systems to chemical accuracy. We look at the systematic molecular fragmentation by annihilation method for a model peptide system and show that this procedure reproduces the shielding constants of a full calculation at only a fraction of the cost. Discussion of the considerations needed in applying this method is discussed and comparison made with the results of the similar fragment molecular orbital and ONIOM methods.

关键词： 自动驾驶   解读   智能技术   移动计算   汽车设计   ARM   芯片  

摘要： 智能技术的发展目前如火如荼,在目前广受关注的自动驾驶领域,作为全球移动计算业界巨头的ARM也需要开拓出一片新的市场。无独有偶,近期,ARM公布了一款专为汽车设计的芯片,其重点放在了安全和稳定上面。那么,这款芯片有哪些独到之处呢?今天本文就带你一起来了解一下。

关键词： 自适应线性四分树   空间文本对象   最近邻查询   空间关键词查询   移动计算  

摘要： 随着移动互联网的快速发展和智能移动设备的广泛普及,空间文本对象的数量在不断增大,随之而来的是开展空间关键词查询技术的研究。Top-k空间关键词搜索是从空间数据库中探索有用信息的重要途径。近年来已经提出了各种各样的混合索引技术,主要是将R树和倒排表结合起来,从而同时执行空间修剪和文本修剪。然而,随着数据量的快速增长,在索引维护成本和查询处理时间两个方面对现有的方法提出了很大的挑战。针对这一问题,在改进的线性四分树的基础上,提出一种基于自适应虚拟四分树的空间关键词最近邻查询算法Avqt。在真实数据上进行实验验证,结果表明该算法的有效性。

关键词： Chemical shift   Density functional theory   DFT   Metabolomics   NMR   NWchem   Python   Quantum chemistry  

摘要： When using nuclear magnetic resonance (NMR) to assist in chemical identification in complex samples, researchers commonly rely on databases for chemical shift spectra. However, authentic standards are typically depended upon to build libraries experimentally. Considering complex biological samples, such as blood and soil, the entirety of NMR spectra required for all possible compounds would be infeasible to ascertain due to limitations of available standards and experimental processing time. As an alternative, we introduce the in silico Chemical Library Engine (ISiCLE) NMR chemical shift module to accurately and automatically calculate NMR chemical shifts of small organic molecules through use of quantum chemical calculations. ISiCLE performs density functional theory (DFT)-based calculations for predicting chemical propertiesspecifically NMR chemical shifts in this manuscriptvia the open source, high-performance computational chemistry software, NWChem. ISiCLE calculates the NMR chemical shifts of sets of molecules using any available combination of DFT method, solvent, and NMR-active nuclei, using both user-selected reference compounds and/or linear regression methods. Calculated NMR chemical shifts are provided to the user for each molecule, along with comparisons with respect to a number of metrics commonly used in the literature. Here, we demonstrate ISiCLE using a set of 312 molecules, ranging in size up to 90 carbon atoms. For each, calculation of NMR chemical shifts have been performed with 8 different levels of DFT theory, and with solvation effects using the implicit solvent Conductor-like Screening Model. The DFT method dependence of the calculated chemical shifts have been systematically investigated through benchmarking and subsequently compared to experimental data available in the literature. Furthermore, ISiCLE has been applied to a set of 80 methylcyclohexane conformers, combined via Boltzmann weighting and compared to experimental values. We demons

关键词： 人工智能   移动计算   智能环境   搜索引擎   信息环境   智能行为   互联网   物联网  

摘要： 人工智能是1956年美国达沃斯提出的概念，如今中国出现了大量的新需求，这些需求是60年前不曾想到的。如今我们遇到了与当年完全不同的智能环境，包括互联网、移动计算、超级计算、穿戴设备、物联网、搜索引擎等，在此形势下，人工智能必须做出改变，才能够充分利用信息环境，做出新的智能行为。

关键词： 三星   架构   高性能处理器   正义   内部设计   移动计算   功耗控制   第三方  

摘要： 目前移动计算市场中的高性能处理器“玩家”已经所剩不多,除了苹果和华为这样自产自销的厂商外,只有高通、三星还在向第三方厂商提供高性能处理器。三星在2018年1月发布了旗下第三款自研高性能处理器Exynos9810,采用了全新Exynos M3架构。在三星的描述中,Exynos M3在性能和功耗控制上相比前代产品有大幅进步。那么,Exynos M3究竟在设计方面有什么值得关注的地方,其内部设计又有哪些过人之处呢?本文就来和大家一起探讨这些问题。

关键词： Pie   能带   设计风格   移动计算   大系统   技术演进   id系统   版本  

摘要： Android的重要性在今天已经无需多说。从2007年诞生到现在,Android从一个不完整的0.5版本到如今广泛使用的8.0版本,加入了大量的功能,完善了整个系统的设计,并衍生出一整套设计风格、使用逻辑和产品生态链。毫不夸张的说,Android和iOS,是构成我们目前移动计算市场的两大系统基石。作为移动计算的半边天,Android的技术演进步伐是非常明确而迅速的。在2018年3月,谷歌宣布了全新版本的Android系统,并在2018年8月6日发布了新系统的最终版本。

关键词： 移动计算机设备   管理系统   设计思想  

摘要： 移动计算机设备管理系统的研究与实现,是提高移动计算机设备使用效率,保证移动计算机设备可以更好地服务于各个企业单位的重要手段。笔者研究了移动计算机设备管理系统的设计思想和基本特点,对系统中的主要功能进行介绍,并对系统应用的技术以及所需的运行、实现效果进行了简单分析。