THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

The Design and Analysis of Experiments

Wearable electronics are emerging as a platform for next-generation, human-friendly, electronic devices. A new class of devices with various functionality and amenability for the human body is essential. These new conceptual devices are likely to be a set of various functional devices such as displays, sensors, batteries, etc., which have quite different working conditions, on or in the human body. In these aspects, electronic textiles seem to be a highly suitable possibility, due to the unique characteristics of textiles such as being light weight and flexible and their inherent warmth and the property to conform. Therefore, e-textiles have evolved into fiber-based electronic apparel or body attachable types in order to foster significant industrialization of the key components with adaptable formats. Although the advances are noteworthy, their electrical performance and device features are still unsatisfactory for consumer level e-textile systems. To solve these issues, innovative structural and material designs, and novel processing technologies have been introduced into e-textile systems. Recently reported and significantly developed functional materials and devices are summarized, including their enhanced optoelectrical and mechanical properties. Furthermore, the remaining challenges are discussed, and effective strategies to facilitate the full realization of e-textile systems are suggested.

Recent Progress of Textile-Based Wearable Electronics: A Comprehensive Review of Materials, Devices, and Applications.

Design of experiments using the Taguchi approach: Synthesis of ZnO nanoparticles

This paper presents a planar monopole backed with a 2 × 1 array of electromagnetic bandgap (EBG) structures. The reflection phase of a single EBG unit cell has been studied and exploited toward efficient radiation of a planar monopole antenna, intended for wearable applications. The shape of the EBG unit cell and the gap between the ground and the EBG layer are adjusted so that the antenna operates at 2.45 GHz. The proposed antenna retains its impedance matching when placed directly upon a living human subject with an impedance bandwidth of 5%, while it exhibits a measured gain of 6.88 dBi. A novel equivalent array model is presented to qualitatively explain the reported radiation mechanism of the EBG-backed monopole. The proposed antenna is fabricated on a 68 × 38 × 1.57 mm
 3
 board of semiflexible RT/duroid 5880 substrate. Detailed analysis and measurements are presented for various cases when the antenna is subjected to structural deformation and human body loading, and in all cases, the EBG-backed monopole antenna retains its high performance. The reported efficient and robust radiation performance with very low specific absorption rate, compact size, and high gain make the proposed antenna a superior candidate for most wearable applications used for off-body communication.

https://pureadmin.qub.ac.uk/ws/files/138746400/TAP2635588.pdf

Compact EBG-Backed Planar Monopole for BAN Wearable Applications

A review paper concerning wide-band and ultra-wideband (UWB) antennas used for wireless communication purposes in terms of the materials as well as a numerical analysis is presented. These antennas which are taken into account are listed as wide-band microstrip antenna, wide-band monopole antenna over a plate, wide-slot UWB antenna, stacked patch UWB antenna, taper slot (TSA) UWB antenna, metamaterial (MTM) structure UWB antennas, elliptical printed monopole UWB antenna, and flexible wearable UWB antenna. The antennas’ performance is compared based on their size and how they can be applicable for portable communication device applications. This review paper furnishes a proper direction to select varieties of figures in terms of impedance bandwidth, gain, directivity, dimensions, time domain characteristics, and materials affecting these antenna’s characteristics.

/pdf/ultra-wideband-antennas-for-wireless-communication-ce0j6biyt7.pdf

Ultra-Wideband Antennas for Wireless Communication Applications

In this study, the capability of artificial neural networks and multiple linear regression methods for modeling the tensile properties of cotton-covered nylon core yarns based on process parameters were investigated. The developed models were assessed by verifying Mean Square Error (MSE) and Correlation Coefficient (R-value) the test data prediction. The results indicated that artificial neural network algorithm has better performance in comparison with multiple linear regression. The difference between the mean square error of predicting these two models for breaking strength and breaking elongation was 0.365 and 0.119, respectively. The five-fold cross-validation technique was used to evaluate the performance of artificial neural network algorithm. Moreover, the weight decay technique was also used for preventing the memorization.

Analysis of Two Modeling Methodologies for Predicting the Tensile Properties of Cotton-covered Nylon Core Yarns

In this study, a novel textile fractal antenna is designed and optimized using genetic algorithm for super-wideband applications. The antenna design is based on the iterations of triangular–circular patch and a partially modified elliptical ground plane. Results show that the proposed antenna presents impedance bandwidth (return loss < −10 dB) covering the range of frequencies from 1.4 to 20 GHz. The present design mainly focuses on the current trends in the development of wireless body area networks for many wireless communications such as GPS, PCS-1900, IMT-2000/UMTS, WiFi, Bluetooth, and UWB applications.

Super-wideband textile fractal antenna for wireless body area networks

Nowadays the application of elastic core-spun yarns in fabric manufacturing and the clothing industry has increased tremendously. These yarns undergo tensile fatigue loading, a common phenomenon wh...

Structural evaluation of elastic core-spun yarns and fabrics under tensile fatigue loading

X-ray shielding behavior of garment woven with melt-spun polypropylene monofilament

The bagging characteristics of elastic woven fabrics under tensile fatigue cyclic loads have been studied. The effect of draw ratio of core part and twist factor of cotton/spandex core-spun yarns on bagging characteristics has been studied. The results show that the amount of bagging fatigue of woven samples seems to be reduced when high level of draw ratio and low level of twist coefficient are applied. Furthermore, bagging fatigue increases after 1000 cyclic loads but no significant change is observed after 2000 cyclic loads.

http://nopr.niscair.res.in/bitstream/123456789/10744/1/IJFTR%2035%284%29%20298-302.pdf

Mohsen Shanbeh

Papers

Analysis of Two Modeling Methodologies for Predicting the Tensile Properties of Cotton-covered Nylon Core Yarns

Super-wideband textile fractal antenna for wireless body area networks

Structural evaluation of elastic core-spun yarns and fabrics under tensile fatigue loading

X-ray shielding behavior of garment woven with melt-spun polypropylene monofilament

Effect of tensile fatigue cyclic loads on bagging deformation of elastic woven fabrics