Book Review: "The Interface: IBM and the Transformation of Corporate Design, 1945-1975", John Harwood, Minneapolis: University of Minnesota Press, 2011

Within the history of twentieth-century design, there are a number of well-known objects and stories that are invoked time and time again to capture a pivotal moment or summarize a much broader historical transition. For example, Marcel Breuer’s Model B3 chair is frequently used as a stand-in for the radical investigations of form and new industrial materials occurring at the Bauhaus in the mid-1920s. Similarly, Raymond Loewy’s streamlined pencil sharpener has become historical shorthand for the emergence of modern industrial design in the 1930s. And any discussion of the development of American postwar “organic design” seems incomplete without reference to Charles and Ray Eames’s molded plywood leg splint of 1942. Such objects and narratives are dear to historians of modern design. They are tangible, photogenic subjects that slot nicely into exhibitions, historical surveys, and coffee-table best sellers...

A coupled VOF-IBM-enthalpy approach for modeling motion and growth of equiaxed dendrites in a solidifying melt

A coupled methodology for simulating the simultaneous growth and motion of equiaxed dendrites in solidifying melts is presented. The model uses the volume-averaging principles and combines the features of the enthalpy method for modeling growth, immersed boundary method for handling the rigid solid-liquid interfaces, and the volume of fluid method for tracking the advection of the dendrite. The algorithm also performs explicit-implicit coupling between the techniques used. A two-dimensional framework with incompressible and Newtonian fluid is considered. Validation with available literature is performed and dendrite growth in the presence of rotational and buoyancy driven flow fields is studied. It is seen that the flow fields significantly alter the position and morphology of the dendrites. (C) 2012 Elsevier Inc. All rights reserved.

IBM PC与Nicolet数字示波器之间的通信

本文介绍了IBM pC/AT Nicolet 4094数字示波器之间的通信,采用了串行异步通信和并行通信两种方式,为材料动态力学性能试验瞬态波形的采集和处理提供了一种重要手段。

IBM PC Data Acquisition and Processing Software Evaluation

Commercially available software packages for IBM PC-compatibles are evaluated to use for data acquisition and processing work. Moss Landing Marine Laboratories (MLML) acquired computers since 1978 to use on shipboard data acquisition (Le. CTD, radiometric, etc.) and data processing. First Hewlett-Packard desktops were used then a transition to the DEC VAXstations, with software developed mostly by the author and others at MLML (Broenkow and Reaves, 1993; Feinholz and Broenkow, 1993; Broenkow et al, 1993). IBM PC were at first very slow and limited in available software, so they were not used in the early days. Improved technology such as higher speed microprocessors and a wide range of commercially available software made use of PC more reasonable today. MLML is making a transition towards using the PC for data acquisition and processing. Advantages are portability and available outside support.

HPCC在IBM刀片机群上的诊断测试与结果分析

在IBMJS21 Blade Center上进行2次HPCC测试,介绍HPCC的结果分析方法,并采用分层模型AHPCC对HPCC的测试结果进行分析。其目的是通过在高性能机群上执行HPCC测试说明HPCC测试对机群系统的评价和诊断能力。实验发现,在之前的HPL测试结果一直不理想并且无法更进一步发现和解决问题的情况下,采用HPCC测试能够较好地评价系统和诊断系统问题。通过分层模型的评价,能够得到更多关于目标系统的性能参数和发现可能的性能瓶颈,为系统设计及构建积累有价值的经验。

可在IBM微机上运行的太阳能系统瞬态模拟程序——TRNSYS IBM-PC版

国际流行的太阳能系统瞬态模拟程序——TRNSYS是一个大型程序包，它只能在容量足够大的计算机上使用。本文介绍的是改进的TRNSYS，它可在IBM-PC微机上运行，能模拟各种太阳能系统，便于推广使用。本文对其结构及使用方法作出介绍，并以算例说明。

应用IBM-2对混合对称态的一些探讨

本文应用相互作用玻色子模型（IBM-2）的理论对混合对称态作了一些讨论。首先给出IBM-2普遍的和一种简化的Hamiltonian的Casimir算子展开式，通过对几种简化Hamiltonian动力学对称性和F-旋对称性的分析，并且考虑最主要的核子相互作用，选择了一种较理想的简化Hamiltonian。其次，用最小二乘法提取了部分U（5）类核和O（6）类核的玻色子等效电荷，并用此计算了它们的混合对称态的电磁跃迁几率。最后，用数值方法系统地计算和分析了~(150,152,154)Gd核混合对称态的能级和电磁跃迁几率，得到~(150)G和~(152,154)Gd核最低能量的混合对称态分别为2_M~+和I_M~+。另外，还详细讨论了Majorana相互作用参数对能级和电磁跃迁几率的影响

IBM-2的有效玻色子数及数值计算

本文简单介绍了原子核集体运动的代数模型－IBM－2，评述了近年来的研究结果；提出了一种确定有效玻色子数的半经验方法，并且提出接近半满壳处偶偶核的有效玻色子数饱和的概念（50～82大壳饱和值为6，82～126大壳饱和值为7，126～184（？）大壳饱和值为8），把稀土区偶偶核的E2和M1之间的关联性及它们的饱和性解释为有效玻色子数的饱和，E_2~+的饱和解释为半满壳附近中子质子四极四极相互作用远大于对力的结果；并把本文关于有效玻色子数的结果用于Q_o和E_2~+系统学，F旋多重态和数值计算中，结果比过去有较大改进；本文还给出了哈密顿量参数的改变对能谱影响的经验规律，并用NPBOS程序计算了~(132-150)Nd偶偶核同位素，~(134)Ba等，对它们的状态特别是其中的混合对称态进行了细致的讨论，能谱和电磁跃迁计算结果与实验数据吻合较好，本文还计算了~(142)Ce的混合比并与实验进行了比较；此外，本文还通过具体的核对IBM－2数值计算参数g_(πv)~((1)) (1=0，2，4)进行了讨论，对M1跃迁算子的两体项作了初步的分析