Abstract
This paper presents the development of an add-on for CAD system generating assembly structure automatically based on a given Bill of Materials (BOM). The BOM in Excel format is scanned by ...the system and the system arrange 3D CAD files into assembly at in CATIA V5 CAD system automatically. This program has been tested and succeeded well at compiling 3D assembly based on 3D part file data that is available or not available. If the 3D file is not available then the 3D assembly is still generated according to the assembly structure listed on Excel file but its 3D representation does not appear.
The self‐assembly of copolymers containing crystallizable blocks in solution has received increasing attention in the past few years. Various strategies including crystallization‐driven self‐assembly ...(CDSA) and polymerization‐induced CDSA (PI‐CDSA) have been widely developed. Abundant self‐assembly morphologies are captured and advanced applications have been attempted. In this review, the synthetic strategies including the mechanisms and characteristics are highlighted and a survey on the advanced applications of crystalline nano‐assemblies is collected. This review is hoped to depict a comprehensive outline for self‐assembly of copolymers containing crystallizable blocks in recent years and to prompt the development of the self‐assembly technology in interdisciplinary fields.
Over the last few years, crystallization‐driven self‐assembly (CDSA) and polymerization‐induced CDSA (PI‐CDSA) have been widely utilized in preparing nano‐objects containing crystallizable blocks. These nano‐objects with various architectures have been applied to multiple fields. This review focus on the strategies and applications of self‐assembly of copolymers containing crystallizable blocks.
In this study, Greene describes the rise of the lower houses in the four southern royal colonies--Virginia, North Carolina, South Carolina, and Georgia--in the period between the Glorious Revolution ...and the American War for Independence. It assesses the consequences of the success of the lower houses, especially the relationship between their rise to power and the coming of the American Revolution.Originally published in 1963.A UNC Press Enduring Edition -- UNC Press Enduring Editions use the latest in digital technology to make available again books from our distinguished backlist that were previously out of print. These editions are published unaltered from the original, and are presented in affordable paperback formats, bringing readers both historical and cultural value.
Established in 1659 as Misión de Nuestra Señora de Guadalupe de los Mansos del Paso del Norte, Ciudad Juárez is the oldest colonial settlement on the U.S.-Mexico border-and one of the largest ...industrialized border cities in the world. Since the days of its founding, Juárez has been marked by different forms of conquest and the quest for wealth as an elaborate matrix of gender, class, and ethnic hierarchies struggled for dominance. Juxtaposing the early Spanish invasions of the region with the arrival of late-twentieth-century industrial “conquistadors,” Fragmented Lives, Assembled Parts documents the consequences of imperial history through in-depth ethnographic studies of working-class factory life. By comparing the social and human consequences of recent globalism with the region's pioneer era, Alejandro Lugo demonstrates the ways in which class mobilization is itself constantly being “unmade” at both the international and personal levels for border workers. Both an inside account of maquiladora practices and a rich social history, this is an interdisciplinary survey of the legacies, tropes, economic systems, and gender-based inequalities reflected in a unique cultural landscape. Through a framework of theoretical conceptualizations applied to a range of facets—from multiracial “mestizo” populations to the notions of border “crossings” and “inspections,” as well as the recent brutal killings of working-class women in Ciudad Juárez—Fragmented Lives, Assembled Parts provides a critical understanding of the effect of transnational corporations on contemporary Mexico, calling for official recognition of the desperate need for improved working and living conditions within this community.
Noncovalent systems are adaptive and allow facile processing and recycling. Can they be at the same time robust? How can one rationally design such systems? Can they compete with high-performance ...covalent materials? The recent literature reveals that noncovalent systems can be robust yet adaptive, self-healing, and recyclable, featuring complex nanoscale structures and unique functions. We review such systems, focusing on the rational design of strong noncovalent interactions, kinetically controlled pathway-dependent processes, complexity, and function. The overview of the recent examples points at the emergent field of noncovalent nanomaterials that can represent a versatile, multifunctional, and environmentally friendly alternative to conventional covalent systems.
Material and energy efficiencies are two key parameters that benchmark the electrochemical energy conversion and storage devices (EECSDs). Maximizing both requires researchers to grasp the limits of ...the physiochemical properties of core electrode materials. Ordered mesoporous materials (OMMs) have been regarded as promising electrode materials; however, their intrinsic deficiencies (e.g., plugs, inaccessible pores, and surfaces) impose limits for wide applications. 2D ordered mesoporous materials (2DOMMs) featured with an extended lateral dimension and a nanometer thickness not only inherit the structure advantages of mesoporous materials, but also have a unique 2D ultrathin feature that can fully address the imperfections of conventional OMMs. Herein, recent achievements on the preparation of 2DOMMs by combining single micelle assembly strategy with 2D bottom‐up patterning techniques including the molecular/space confined, interfacial orientated, and surface limited assembly are focused. Special focus is devoted to the newly developed synthetic strategies and their fundamental mechanisms for accurate control of some key structural parameters. Recent advances of 2DOMMs in EECSDs are also highlighted, which suggest that 2DOMMs are excellent material platforms for developing new battery chemistry as well as targeting performance optimization and cost reduction. Finally, the challenges and prospects are proposed based on current development.
The recent achievements in the preparation of 2D ordered mesoporous materials (2DOMMs) for high performance electrochemical energy conversion and storage devices by combining a single micelle assembly strategy with 2D bottom‐up patterning techniques including the confined, interfacial orientated (solid surface, 2D free‐standing surface, and lamellar surface), and surface limited assembly are reviewed.
The 4th industrial revolution (Industry 4.0, I4.0) is based upon the penetration of many new technologies to the industrial world. These technologies are posed to fundamentally change assembly lines ...around the world. Assembly systems transformed by I4.0 technology integration are referred to here as Assembly 4.0 (A4.0). While most I4.0 new technologies are known, and their integration into shop floors is ongoing or imminent, there is a gap between this knowledge and understanding the form and the impact of their full implementation in assembly systems. The path from the new technological abilities to improved productivity and profitability has not been well understood and has some missing parts. This paper strives to close a significant part of this gap by creating a road map to understand and explore the impact of typical I4.0 new technologies on A4.0 systems. In particular, the paper explores three impact levels: strategic, tactical, and operational. On the strategic level, we explore aspects related to the design of the product, process, and the assembly system. Additionally, the paper elaborates on likely changes in assembly design aspects, due to the flexibility and capabilities that these new technologies will bring. Strategic design also deals with planning and realizing the potential of interactions between sub-assembly lines, kitting lines, and the main assembly lines. On the tactical level, we explore the impact of policies and methodologies in planning assembly lines. Finally, on the operational level, we explore how these new capabilities may affect part routing and scheduling including cases of disruptions and machine failures. We qualitatively assess the impact on performance in terms of overall flow time and ability to handle a wide variety of end products. We point out the cases where clear performance improvement is expected due to the integration of the new technologies. We conclude by identifying research opportunities and challenges for advanced assembly systems.
A facile and quick approach to prepare self-assembled monolayers of water-dispersible particles on the water surface is presented. Particle suspensions in alcohols were dropped on a water reservoir ...to form long-range ordered monolayers of various particles, including spherical solid particles, soft hydrogel particles, metal nanoparticles, quantum dots, nanowires, single-wall carbon nanotubes (SWCNTs), nanoplates, and nanosheets. A systematic study was conducted on the variables affecting the monolayer assembly: the solubility parameter of spreading solvents, particle concentration, zeta potential of the particles in the suspension, surface tension of the water phase, hardness of the particles, and addition of a salt in the suspension. This method requires no hydrophobic surface treatment of the particles, which is useful to exploit these monolayer films without changing the native properties of the particles. The study highlights a quick 2D colloidal assembly without cracks in the wafer scale as well as transparent conductive thin films made of SWCNTs and graphenes.
Macromolecular self‐assembly (MSA) has been an active and fruitful research field since the 1980s, especially in this new century, which is promoted by the remarkable developments in controlled ...radical polymerization in polymer chemistry, etc. and driven by the demands in bio‐related investigations and applications. In this review, we try to summarize the trends and recent progress in MSA in relation to biomimetic chemistry and bio‐inspired materials. Our paper covers representative achievements in the fabrication of artificial building blocks for life, cell‐inspired biomimetic materials, and macromolecular assemblies mimicking the functions of natural materials and their applications. It is true that the current status of the deliberately designed and obtained nano‐objects based on MSA including a variety of micelles, multicompartment vesicles, and some hybrid and complex nano‐objects is at their very first stage to mimic nature, but significant and encouraging progress has been made in achieving a certain similarity in morphologies or properties to that of natural ones. Such achievements also demonstrate that MSA has played an important and irreplaceable role in the grand and long‐standing research of biomimetic and bio‐inspired materials, the future success of which depends on mutual and persistent efforts in polymer science, material science, supramolecular chemistry, and biology.
Expansion into life science and material science is one of the major trends and the most important long‐time goals of modern polymer science. Our paper tries to trace the most recent footsteps of macromolecular self‐assembly in this direction. It covers the representative achievements in the fabrication of artificial building blocks for life, cell‐inspired biomimetic materials, assemblies mimicking the functions of natural materials and their applications.
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