Results 11 to 20 of about 501,550 (268)

Asymmetric Curvature Side-Polished Optical Fiber Coupler

open access: yesIEEE Photonics Journal, 2023
An optical fiber coupler composed of two side-polished fibers with different curvature is proposed. The live-fiber is polished with a typical radius of curvature of 0.25 m, while the branch-fiber is polished with a larger radius of curvature.
Takui Uematsu   +4 more
doaj   +1 more source

Novel Wide-Range Frequency Offset Estimation and Compensation for Burst-mode CPFSK Upstream Signaling in TDM-Based Digital Coherent PON

open access: yesIEEE Photonics Journal, 2023
The burst-mode continuous phase frequency shift-keying (CPFSK) transmitter that combines a directly modulated laser diode, an electro absorption modulator and a semiconductor optical amplifier is attractive as a cost-effective transmitter for phase ...
Takuya Kanai   +4 more
doaj   +1 more source

Optical-referenceless optical frequency counter with twelve-digit absolute accuracy

open access: yesScientific Reports, 2023
A simpler and more accurate measurement of absolute optical frequencies (AOFs) is very important for optical communications and navigation systems. To date, an optical reference has been needed for measuring AOFs with twelve-digit accuracy because of the
Atsushi Ishizawa   +4 more
doaj   +1 more source

Distribution Matching for Dimming Control in Visible-Light Region-of-Interest Signaling

open access: yesIEEE Photonics Journal, 2023
We propose a two-level dimmer based on binary distribution matching where a low-rate signal controls the output probability distribution of a high-rate bit sequence, which can be used in region-of-interest (RoI) signaling applications. To reduce the rate
Phuc Duc Nguyen   +5 more
doaj   +1 more source

Effect of a telephonic intervention on the adherence of patients

open access: yesSouth African Journal of Physiotherapy, 2003
The effectiveness of a telephonic intervention in increasingpatients’ adherence to a health behaviour modification programme was tested. Patients were randomly assigned to two groups, the Experimental group receiving the telephonic intervention. Patients
A. V. Stewart
doaj   +1 more source

Passion Performative: Reading Cocteau with Proust and Derrida / Performatiiv ja kirg: lugedes Cocteau’d Prousti ja Derridaga

open access: yesMethis: Studia Humaniora Estonica, 2021
: The article demonstrates that the use of the telephone as a performative medium on stage or in literature introduces the non-existent to the existent, making absence explicit and making it possible to foretell death, especially of a person one loves ...
Tanel Lepsoo
doaj   +1 more source

The potential of alternatives to face-to-face consultation in general practice, and the impact on different patient groups: a mixed-methods case study

open access: yesHealth Services and Delivery Research, 2018
Background: There is international interest in the potential role of different forms of communication technology to provide an alternative to face-to-face consultations in health care.
Helen Atherton   +8 more
doaj   +1 more source

In Search of the Optimal Mode for Mobile Phone Surveys in Developing Countries. A Comparison of IVR, SMS, and CATI in Nigeria

open access: yesSurvey Research Methods, 2019
Mobile phone surveys are increasingly prevalent in low- and middle-income countries. The main modes include computer-assisted telephone interviewing (CATI), interactive voice response (IVR), and short message service (SMS, or text messaging).
Charles Q Lau   +3 more
doaj   +1 more source

MMW-AQA: Multimodal In-the-Wild Dataset for Action Quality Assessment

open access: yesIEEE Access
Action quality assessment (AQA) is a task for assessing a specific action quality in videos. Since existing AQA datasets provide only two-dimensional (2D) video data captured from fewer viewpoints, existing AQA methods based on deep neural networks (DNNs)
Takasuke Nagai   +3 more
doaj   +1 more source

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