Results 41 to 50 of about 15,259 (192)

Economic Burden of Rheumatoid Arthritis in Low‐ and Middle‐Income Countries: Systematic Review and Meta‐Analysis

open access: yesArthritis Care &Research, EarlyView.
Objective The aim of this systematic review was to synthesize the economic impact of rheumatoid arthritis (RA) on households, health systems, and society in low‐ and middle‐income countries (LMICs). Methods Electronic databases such as PubMed, Web of Science, and CINAHL were searched using keywords related to RA and cost of illness.
Tadesse Gebrye   +6 more
wiley   +1 more source

A New Topology of Single-Phase Common Ground Buck-Boost Inverter With Component Voltage Rating Reduction

open access: yesIEEE Access, 2023
The combination of conventional front-end DC-DC converter and H-bridge inverter has been proposed with common-ground (CG) characteristic and voltage booting capability.
Vinh-Thanh Tran   +3 more
doaj   +1 more source

Nonlinear control of dc/dc power converters with inherent current and power limitation [PDF]

open access: yes, 2016
A nonlinear controller with an inherent current-limiting capability is presented in this paper for different types of dc/dc power converters (boost, buck-boost).
Konstantopoulos, G., Zhong, Q.
core   +1 more source

Impact of Positive Lifestyle Behaviors on Direct Health Care Cost Savings for Low Back Pain

open access: yesArthritis Care &Research, EarlyView.
Objective This study aimed to investigate the relationship between a previously purpose‐developed lifestyle behavior scale and health care cost savings related to low back pain (LBP). Methods This longitudinal study used data from the Australian Twin Back (AUTBACK) study. LBP and lifestyle behavior measures were collected at baseline. Physical activity
Ye Tian   +8 more
wiley   +1 more source

A Z-Source Network Integrated Buck-Boost PFC Rectifier [PDF]

open access: yesInternational Journal of Industrial Electronics, Control and Optimization, 2019
This paper presents a wide range gain buck-boost type PFC rectifier based on the conventional buck-boost DC-DC converter. This novel rectifier is fed by a buck-type Z-source network at the DC side with the help of an inductor smoothing the AC side input ...
Mohammad Monfard   +2 more
doaj   +1 more source

Analisis Penerapan Auto Buck/boost Pada Generator Termoelektrik Sebagai Pembangkit Listrik Alternatif [PDF]

open access: yes, 2016
Generator termoelektrik merupakan pembangkit listrik terbarukan yang memanfaatkan perbedaan suhu dua buah semikonduktor untuk dirubah menjadi energi listrik melalui sebuah elemen termoelektrik berdasarkan prinsip efek Seebeck.
Anwar, M. C. (Mohamad)
core   +1 more source

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

open access: yesAdvanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang   +10 more
wiley   +1 more source

Three new DC-to-DC Single-Switch Converters

open access: yesRenewable Energy and Sustainable Development, 2017
This paper presents a new family of three previously unidentified dc-to-dc converters, buck, boost, and buck-boost voltage-transfer-function topologies, which offer advantageous transformer coupling features and low capacitor dc voltage stressing.
Barry W. Williams, Mona Fouad Moussa
doaj   +1 more source

A high efficiency non-inverting multi device buck-boost DC-DC converter with reduced ripple current and wide bandwidth for fuel cell low voltage applications [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2018
The voltage produced by the fuel cell (FC) device is unregulated and varies from 0.4 V to 0.8 V on full load to no-load respectively. When these devices are used in low voltage applications and output voltage lies between higher and lower values of input
Venkatesh Naik M., Samuel Paulson
doaj   +1 more source

Buck-boost dc voltage regulator [PDF]

open access: yes, 1970
Circuit provides voltage regulation through a wide range of operating frequencies without intervals of high power ...
La Vigna, T.
core   +1 more source

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