47 research outputs found
CPM Training Waveforms With Autocorrelation Sidelobes Close to Zero
Continuous phase modulation (CPM) plays an important role in wireless communications due to its constant envelope signal property and tight spectrum confinement capability. Although CPM has been studied for many years, CPM training waveforms having autocorrelations with zero sidelobes have not been reported before, to the best of our knowledge. Existing works on the CPM system design mostly assume that the channel fading coefficients are either perfectly known at the receiver or estimated using random CPM training waveforms. In this correspondence paper, we propose a novel class of CPM training waveforms displaying autocorrelation sidelobes close to zero. The key idea of our construction is to apply differential encoding to Golay complementary pair having perfect aperiodic autocorrelation sum properties
Robust, Conformal ZnO Coatings on Fabrics via Atmospheric-Pressure Spatial Atomic Layer Deposition with In-Situ Thickness Control
This is the peer reviewed version of the following article: Gurbandurdyyev, G., Mistry, K., Delumeau, L. V., Loke, J. Y., Teoh, C. H., Cheon, J., Ye, F., Tam, K. C., & Musselman, K. P. (2023). Robust, conformal zno coatings on fabrics via atmospheric‐pressure spatial atomic layer deposition with in‐situ thickness control**. ChemNanoMat, 9(2)., which has been published in final form at https://doi.org/10.1002/cnma.202200498. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.Zinc oxide (ZnO) is a promising material for functionalization of textiles. It can add a range of functionalities, including UV protection, antimicrobial activity, flame retardancy, hydrophobicity and electrical conductivity. Commercialization of ZnO – coated textiles is still limited due to the cost and challenges related to their manufacture. Moreover, making robust coatings on textiles and measuring their thickness is also challenging. In this work, atmospheric-pressure spatial atomic layer deposition (AP-SALD) systems are utilized for the first time to coat synthetic spun-bond polypropylene (PP) and natural cotton fabrics with ZnO. The coatings are found to be conformal and uniform, forming complete shells around the fabric fibers. The growth rate is measured to be ~0.24 nm/cycle using an in-situ reflectance setup and Virtual Interface (VI) model, which enable precise control of the coating thickness. The coatings are shown to provide UV-protection and render cotton fabric hydrophobic. No damage is observed after washing, linear abrasion, adhesion, twisting and bending tests, indicating that the coatings are robust. Aerosol-penetration tests indicate the coatings do not impact the filtering efficiency of fabrics used in N95 respirators. The results are encouraging for industrialization of the AP-SALD technique for functional textiles.The polypropylene fabrics were provided by Eclipse Automation. The authors thank Joe Paquette and Rob Shwery at Eclipse Automation for providing helpful information about the polypropylene fabrics. K.P.M. acknowledges funding from NSERC Alliance (ALLRP 554383-20), NSERC Discovery (RGPIN-2017-04212, RGPAS-2017-507977), Canada Foundation for Innovation John R. Evans Leaders Fund (Project 35552), Canada Foundation for Innovation Exceptional Opportunities Fund COVID-19 (Project 41017), and Ontario Ministry of Research, Innovation and Science Low Carbon Innovation Fund (Project Perovskite Photovoltaics)
When is a GIST not a GIST? A case report of synchronous metastatic gastrointestinal stromal tumor and fibromatosis
<p>Abstract</p> <p>Background</p> <p>A number of non-malignant diseases that share similar morphological features as gastrointestinal stromal tumor (GIST) have been reported. Co-existence of GIST with these other diseases is rarely recognized or reported.</p> <p>Case presentation</p> <p>We report a case of a 62 year-old man with long-term stable control of metastatic GIST with systemic therapy, presented with an apparent intra-abdominal progression but not supported by imaging with positron emission tomography. Subsequent resection of the intra-abdominal tumor identified a non-malignant fibroid.</p> <p>Conclusion</p> <p>Differentiating localized progression of GIST from other diseases has important prognostic and therapeutic implications. The potential for co-existence of non-malignant soft tissue neoplasm should always be considered.</p
International Consensus Statement on Rhinology and Allergy: Rhinosinusitis
Background: The 5 years since the publication of the first International Consensus Statement on Allergy and Rhinology: Rhinosinusitis (ICAR‐RS) has witnessed foundational progress in our understanding and treatment of rhinologic disease. These advances are reflected within the more than 40 new topics covered within the ICAR‐RS‐2021 as well as updates to the original 140 topics. This executive summary consolidates the evidence‐based findings of the document. Methods: ICAR‐RS presents over 180 topics in the forms of evidence‐based reviews with recommendations (EBRRs), evidence‐based reviews, and literature reviews. The highest grade structured recommendations of the EBRR sections are summarized in this executive summary. Results: ICAR‐RS‐2021 covers 22 topics regarding the medical management of RS, which are grade A/B and are presented in the executive summary. Additionally, 4 topics regarding the surgical management of RS are grade A/B and are presented in the executive summary. Finally, a comprehensive evidence‐based management algorithm is provided. Conclusion: This ICAR‐RS‐2021 executive summary provides a compilation of the evidence‐based recommendations for medical and surgical treatment of the most common forms of RS
To My Mom,
Abstract: This work assumes that local oscillators in individual transceivers are not identical. A difference in the drift of oscillator gives rise to a difference in pulse repetition rate between transmitter and receiver. This drift will be estimated in the paper. The performance of a proposed Automated Gain Control (AGC) circuit to stabilize the gain of a time tracking loop is also investigated. Thus this work is on estimating the received signal amplitude, the initial offset and frame frequency differences between a pair of UWB impulse transceiver and the results will be useful for applications such as time transfer and synchronization
ERROR PERFORMANCE ANALYSIS FOR PI/M-DMPSK IN FAST FREQUENCY-SELECTIVE RICIAN FADING CHANNEL WITH DIVERSITY RECEPTION
Master'sMASTER OF ENGINEERIN
孔子学院对中国软实力的影响 = The impact of Confucius institute on China’s soft power
本文以软实力的提升方式,文化外交以及孔子学院内部所面对的难题之角度探讨孔子学院对中国软实力的影响。约瑟奈教授提出了“软实力”的理论后,各国开始把软实力作为衡量国家实力及国际地位的一大标准。孔子学院成立于 2004 年11 月,逐渐成为中国软实力的最亮品牌,不论是中国,或是其他国家都把孔子学院当作是中国增强软实力的最大工具。中国政府通过设立孔子学院,以官方的角度推广中国文化,提升中国的形象,最终达到提升软实力的目的。通过与美国民间流行文化相比,有助于了解官方传播中国文化的方式是否有效。此外,本文也将从孔子学院所教授课程的角度来说明孔子学院对中国软实力的影响。孔子学院在官方的推动下,拥有专业的语言、文化教授的优势。但是,孔子学院也同时面对许多不利的因素,如中国威胁论,教师与教学资源短缺,以及缺乏经验等问题。This thesis analyzes the impact of Confucius Institute on China’s soft power from the angle of the way to enhance soft power, cultural diplomacy and the problems which Confucius Institute are facing. Countries all along the world have been using Soft Power as a measure of national strength and international status of a major standard since the theory was created by Joseph Nye. The Chinese government popularizes Chinese cultural, improves China’s image and Soft Power through the establishment of Confucius Institutes. We will learn the influential of official cultural diplomacy through the comparison with the United State of America public pop culture. Besides, the impact of Confucius Institutes on China’s soft power is also introduced in this thesis from the aspect of Confucius Institute’s courses provided. Confucius Institutes have the advantages in professional language and cultural teaching under the promotion of Chinese government. However, they are also facing some disadvantages for example the China Treat Theory, the shortage of teaching staff and capital, and the lack of experiences.Bachelor of Art
Effects of Dietary Supplementation with Astaxanthin on Histamine Induced Lesions in the Gizzard and Proventriculus of Broiler Chicks
Astaxanthin (ASX) is a xanthophyll pigment isolated from crustaceans and salmonids. Owing to its powerful antioxidant activity, ASX has been reported to have the potential to protect against gastric ulcers and a variety of other illnesses. Histamine (His) is a dietary factor that causes gastric erosion and ulceration in young chicks. In this study, we examined whether ASX had protective effects on dietary histamine-induced lesions in the gizzard and proventriculus of broiler chickens. Four experimental treatment groups were planned: basal diet (BD), BD+His, BD+ASX, and BD+ASX+His, with four chicks (5 days old) in each group and three replications (i.e., a total of 12 chicks per group). The BD was supplemented with either 0.4% His or 100 ppm ASX. The birds were fed ad libitum for 3 weeks, and diets contained no antimicrobial compounds. Supplementing the diet with His significantly decreased body weight gain, but increased the weights of the gizzard and proventriculus of the chicks as compared with those of chicks in the BD group (p<0.05). ASX did not affect His-dependent changes in chick body weight or weights of the gizzard and proventriculus. The loss of gastric glands in the proventriculus, which was observed in His-treated chicks, was not prevented by ASX administration. The frequency of proventricular ulceration, however, was lowered by treatment with ASX, without significant differences between the two supplementation levels. In conclusion, our data showed that ASX might be helpful for alleviating structural damage to the digestive system in poultry under certain stressful conditions
A study on reconstruction of linear scrambler using dual words of channel encoder
In this paper, the reconstruction of the feedback polynomial as well as the initial state of a linear feedback shift register (LFSR) in a synchronous scrambler placed after a channel encoder is studied. The study is first based on the assumption that the channel is noiseless and then extended to the noisy channel condition. The dual words, which are orthogonal to the codewords generated by the channel encoder, are used in the reconstruction algorithm. The number of bits required by the new algorithm is compared with another recently proposed algorithm and results show that the number of bits required to do the reconstruction can be significantly reduced