Written by an antenna engineer turned professor who has worked at Apple, Nokia and Amphenol,<i>Antenna Design for Mobile Devices</i>is a comprehensive guide for fresh and intermediate ...engineers involved in antenna design. The book instructs readers through all aspects of real world antenna designs, which includes how to make a stable antenna fixture, designing various types of antennas, designing an antenna with good manufacturability, using various matching technique to improve antenna performance, setting up production measurement for mass manufacturing, and making antenna SAR and HAC compliant. Most popular antenna categories, such as internal PIFA, integral IFA, internal folded monopole, ceramic antennas, stubby antennas and whip stubby antennas, are introduced in the book. The book focuses on the basic principle of each kind of antenna and emphasizes on key parameters of antenna optimization. Complimentary matching software, which accompanies the book, is provided so readers can practice various antenna matching technique and design matching circuits for real projects. <ul> <li>A one-stop design reference containing all an engineer needs when designing antennas</li> <li>Accessible to readers of many levels, from introductory to specialist</li> <li>Presents shortcuts for engineers who lack antenna knowledge but need no-hassle techniques for designing simple antennas</li> <li>Contains hands-on knowledge not available in other books</li> <li>Written by a practicing expert who has hired and trained numerous engineers</li> <li>Incorporates the various techniques used by pure-play antenna firms, established mobile device brands, and new entrants to the mobile space</li> <li>Comes with antenna matching software written by the author, which can be used for practice and real-world projects</li> <li>Presentation slides with lecture notes available for instructor use</li> </ul> <p>This book is targeted at practicing antenna engineers, particularly those focusing on mobile devices, as well as researchers and academics looking to keep up with this quick-changing field. Engineering managers will find it to be a helpful guide for teaching new hires, while new hires, by using the book themselves, will be able to quickly gain expert-level proficiencies. The book is also suitable for wireless network equipment engineers, who desire a stronger sense of antenna principles, as well as electronic engineering students studying electromagnetics. Readers should possess a basic undergraduate-level understanding of electromagnetic theory.<br /> Companion website for the book:<br /> <a href="http://www.wiley.com/go/zhangantenna">http://www.wiley.com/go/zhangantenna</a></p>
Islamic art is often misrepresented as an iconophobic tradition. As a result of this assumption, the polyvalence of figural artworks made for South Asian Muslim audiences has remained hidden in plain ...view. This book situates manuscript illustrations and album paintings within cultures of devotion and ritual shaped by Islamic intellectual and religious histories. Central to this story are the Mughal siblings, Jahanara Begum and Dara Shikoh, and their Sufi guide Mulla Shah. Through detailed art historical analysis supported by new translations, this study contextualizes artworks made for Indo-Muslim patrons by putting them into direct dialogue with written testimonies.
In this article we review the value and utility of the minipig as an animal model in regulatory toxicity testing. Our review is based on detailed consideration of the comparative biology of the ...minipig, and of the practical features of toxicity testing in the minipig. The minipig presents a favourable profile as a non-rodent toxicology model, in terms of the similarity to man and also in terms of applicability to different study types. Studies of general toxicology can be performed in the minipig by oral, cutaneous, parenteral and inhalation routes. For reproductive toxicology studies the minipig offers numerous advantages as a non-rodent model although the lack of placental transfer of macromolecules may limit the role of the minipig in reproductive testing of biotechnology products. For safety pharmacology studies the minipig is an advantageous model, particularly as regards the cardiovascular system. The immune system of the pig is better characterized than that of the dog, making the pig an interesting alternative model to the nonhuman primate for therapeutic approaches based on manipulation of the immune system. Overall, this review leads us to believe that the minipig might be a better non-rodent toxicology model than the dog. At the present time, however, insufficient comparative data is available to permit a rigorous evaluation of the predictivity of the minipig for human drug-induced toxicities and research is urgently needed to provide experimental data for evaluation of the hypothesis that minipig studies may better reflect human drug-induced toxicities than studies performed in traditional non-rodent toxicology models. It would be of particular value to gain a better vision of the potential utility of the minipig as a model for the safety testing of new biologics, where the minipig could potentially replace the use of non-human primates in the testing of some new products.
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4.
Worlds Beyond Forsberg, Laura
2021, 2021-05-11
eBook
An innovative study of how the Victorians used books, portraits, fairies, microscopes, and dollhouses to imagine miniature worlds beyond perception.
Epithelial organoids, such as those derived from stem cells of the intestine, have great potential for modelling tissue and disease biology
. However, the approaches that are used at present to ...derive these organoids in three-dimensional matrices
result in stochastically developing tissues with a closed, cystic architecture that restricts lifespan and size, limits experimental manipulation and prohibits homeostasis. Here, by using tissue engineering and the intrinsic self-organization properties of cells, we induce intestinal stem cells to form tube-shaped epithelia with an accessible lumen and a similar spatial arrangement of crypt- and villus-like domains to that in vivo. When connected to an external pumping system, the mini-gut tubes are perfusable; this allows the continuous removal of dead cells to prolong tissue lifespan by several weeks, and also enables the tubes to be colonized with microorganisms for modelling host-microorganism interactions. The mini-intestines include rare, specialized cell types that are seldom found in conventional organoids. They retain key physiological hallmarks of the intestine and have a notable capacity to regenerate. Our concept for extrinsically guiding the self-organization of stem cells into functional organoids-on-a-chip is broadly applicable and will enable the attainment of more physiologically relevant organoid shapes, sizes and functions.
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•Propose a miniature testing-based method to identify properties within structures.•A miniature bulge testing setup is developed to calibrate non quadratic yield locus.•More than 60 experiments are ...performed on an aluminum prismatic Li-ion cell casing.•Yld2000 yield loci and Hosford-Coulomb fracture initiation models are calibrated.•Large spatial properties variations are observed due to manufacturing.
Complex metallic structures are often manufactured through multi-step forming or casting processes that induce severe mechanical property variations within the final part. Instead of using the virgin material properties to predict the final part performance, the local material properties after manufacturing need to be known. A novel comprehensive testing methodology is presented allowing the resolution of spatial gradients in the plasticity and fracture properties in metallic structures. It involves using a recently-developed miniature linear-motion system that probes the material within 2 mm wide gage sections (uniaxial, notched and central hole tension, in-plane shear). Additionally, a novel mini-bulge testing system is presented along with a mini-punch system to provide further insight into the local material response for biaxial loading conditions. A full testing campaign comprising 60 miniature samples is performed on all sides of a prismatic aluminum casing for Li-ion battery cells. The results demonstrate significant property variations with more than 30 % higher yield stresses for the side walls as compared to the bottom section. The miniature specimens allow identifying a location-dependent anisotropy, which would otherwise be missed by standard-sized samples. Furthermore, it is shown that the anisotropic Yld2000 plasticity model and the stress-state dependent Hosford-Coulomb fracture initiation model can be fully identified using results from experiments on miniature specimens only.
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This review covers photonic crystal cavities (PCCs) and their applications in optical sensors, with a particular focus on the structures of different PCCs. For each kind of optical sensor, the ...specific measurement principle, structure of PCC, and the corresponding sensing properties are all presented in detail. The summary of the reported works and the corresponding results demonstrate that it is possible to realize miniature and high-sensitive optical sensors due to the ultra-compact size, excellent resonant properties, and flexibility in structural design of PCCs. Finally, the key problems and new directions of PCCs for sensing applications are discussed.
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