Dual-wavelength thulium fluoride fiber laser based on SMF-TMSIF-SMF interferometer as potential source for microwave generationin 100-GHz region

A dual-wavelength thulium-doped fluoride fiber (TDFF) laser is presented. The generation of the TDFF laser is achieved with the incorporation of a single modemultimode- single mode (SMS) interferometer in the laser cavity. The simple SMS interferometer is fabricated using the combination of two-mode step index fiber and single-mode fiber. With this proposed design, as many as eight stable laser lines are experimentally demonstrated. Moreover, when a tunable bandpass filter is inserted in the laser cavity, a dual-wavelength TDFF laser can be achieved in a 1.5-μm region. By heterodyning the dual-wavelength laser, simulation results suggest that the generated microwave signals can be tuned from 105.678 to 106.524 GHz with a constant step of �0.14 GHz. The presented photonics-based microwave generation method could provide alternative solution for 5G signal sources in 100-GHz region

Bisphosphonates and atrial fibrillation: Bayesian meta-analyses of randomized controlled trials and observational studies

BMC Musculoskeletal Disorders10

Switchable 10, 20, and 30 GHz region photonics-based microwave generation using thulium-doped fluoride fiber laser

In this work, switchable 10, 20, and 30 GHz region photonics-based microwave generation in a fiber laser cavity is proposed and demonstrated. The microwave generation is based on the beating of a dual-wavelength thuliumdoped fluoride fiber laser. With the aid of a micro-air gap in an adapter, single, double, and triple Brillouin spacing can be generated in a single fiber laser cavity without re-routing the cavity. The wavelength spacing of the dual wavelengths that are induced by the single, double, and triple Brillouin spacing are 0.084, 0.166, and 0.254 nm, respectively, at a center wavelength of 1490 nm. In addition, a numerical calculation is performed using MATLAB to prove the generation of microwave signals at 11.34, 22.44, and 34.3 GHz. With the advantage of switchability among the 10, 20, and 30 GHz regions, the proposed photonics-based microwave generation is promising for the advancement of 5G technologies

You Don\u27t Talk About It

I am a poet. As an undergraduate, I explored the other genres of writing—I wrote short stories, attempted a novel-length piece, and crafted essays. While I found plays interesting, I could not write one satisfactorily. But poetry fit like an extension of myself. I could fuse my voice and my ideas in stanzas and images, and I found myself weighing words and sounds as I constructed the lines. It was only natural that I pursue mastery in poetry when I returned for my Masters of Fine Arts. The material presented in this document is the culmination of two years of specialized study in how to craft poetry. In those two years, I have maintained the idea that this collection be relatable, feminist, and emotionally powerful. While the poetry has certainly evolved over that two-year span, the ideas kept each piece connected to my envisioned whole. The poems revolve around different obsessions I harbored while writing. I meditate on various relationships, personal experiences, and striking images and feelings I felt deserved attention. Of course, this collection is intensely personal, but I believe that it is through the personal that we can reach the general, which is what makes these poems accessible. I also used this manuscript as a device for exploration and play. Some poems follow strict formal guidelines, and others meander to their destination. Some are short and concise, others long and nebulous. But each is refined and given exceptional thought. I believe that readers will clearly see how much study was necessary to write these poems; it is through reading the works of the great poets before me that I was able to come to them. My influences show, not only in allusions, but in the choices I’ve made and the structure of the poems themselves. I submit this manuscript as the culmination of my work, in partial fulfilment of a Master of Fine Arts degree in Creative Writing

Dual-wavelength thulium fluoride fiber laser based on SMF-TMSIF-SMF interferometer as potential source for microwave generation in 100-g hz region

A dual-wavelength thulium-doped fluoride fiber (TDFF) laser is presented. The generation of the TDFF laser is achieved with the incorporation of a single modemultimode-single mode (SMS) interferometer in the laser cavity. The simple SMS interferometer is fabricated using the combination of two-mode step index fiber and single-mode fiber. With this proposed design, as many as eight stable laser lines are experimentally demonstrated. Moreover, when a tunable bandpass filter is inserted in the laser cavity, a dual-wavelength TDFF laser can be achieved in a 1.5-µm region. By heterodyning the dual-wavelength laser, simulation results suggest that the generated microwave signals can be tuned from 105.678 to 106.524 GHz with a constant step of ∼0.14 GHz. The presented photonics-based microwave generation method could provide alternative solution for 5G signal sources in 100-GHz region

Promoting Interaction in Classroom via Bluetooth Mobile Messaging Feedback System (MMSF)

Interaction in the classroom has decreased unexpectedly in the recent years. This situation creates a serious threat to the learning environment because interaction plays an important role in shaping students' learning. Hence, an innovative approach is required to elicit student interaction in class. This research describes the use of Mobile Messaging Feedback System (MMFS), a client-server prototype system developed to pronounce interaction in class via mobile phone and Bluetooth technology. A set of design principles based on literature was employed to address the challenges to interaction and to build this prototype. This prototype was later experimented in a Java programming class, which was conducted in a computer lab at Informatics Institute. MMFS enables students to anonymously send questions using their mobile phones via Bluetooth to the lecturer's laptop. The lecturer sees the feedback in real time on her laptop and she can develop the interaction further by verbally addressing the feedback. The system is able to save all the students' feedbacks for a particular lesson into a database file for future review. The experiment, observation, interview and survey validate whether or not the students lecturer interaction could be increased with the usage of MMFS

Women’s Human Rights and Health Equality in Clinical Trials in Canada

Le principe des droits de la personne sur la transparence et l’équité doivent servir de guides aux politiques et activités des compagnies pharmaceutiques. Cet article examine la transparence du processus d’approbation des drogues et de l’égalité des sexes dans les essais cliniques. Les auteurs ont révélé un manque de transparence dans les approches de Santé Canada dans les décisions de régulation des médicaments et une sous-représentation des femmes dans les recherches cliniques importantes

The financial burden of autism spectrum disorder

The prevalence of autism spectrum disorder (ASD) is growing yearly with one in eight children receiving an ASD diagnosis, and rates are predicted to increase. Many children with ASD have other comorbid disorders causing an increased dependence on the health care system and several studies have shown that total health care expenditures for children with ASD were higher than for other disorders. Although we know children with ASD spend more on health care services, there is little evidence examining the financial impact these families experience compared to families of children with other special health care needs (CSHCN). This study examines how health system and coverage inadequacies impact families of children of ASD compared with families of CSHCN