Results 11 to 20 of about 860,720 (284)

A comparative study of Dynamic Hip Screw and Proximal Femoral Nail in the management of Intertrochanteric Fractures of the Femur

open access: yesJournal of Society of Surgeons of Nepal, 2021
Introduction: Intertrochanteric fractures account for approximately half of the hip fractures in the elderly because of the osteoporotic nature of the bone. There are various modalities to treat these fractures. The objective of this study was to compare
Sandeep Gurung, Gopalsagar DC
doaj   +1 more source

sd [PDF]

open access: yesپژوهش در نظام‌های آموزشی, 2011
هدف از پژوهش حاضر تبیین نقش عزت نفس و پیشینۀ تحصیلی در عملکرد تحصیلی است. به همین منظور از میان دانشجویان دانشگاه­های شهر تهران، 522 دانشجو به روش نمونه­گیری تصادفی انتخاب شدند.
dc dc
doaj  

Optimal PWM control of switched-capacitor DC/DC power converters via model transformation and enhancing control techniques [PDF]

open access: yes, 2008
—This paper presents an efficient and effective method for an optimal pulse width modulated (PWM) control of switched-capacitor DC/DC power converters.
Ho, Charlotte Yuk-Fan   +4 more
core   +2 more sources

Design and implementation of 30kW 200/900V LCL modular multilevel based DC/DC converter for high power applications [PDF]

open access: yes, 2016
This paper presents the design, development and testing of a 30kW, 200V/900V modular multilevel converter (MMC) based DC/DC converter prototype. An internal LCL circuit is used to provide voltage stepping and fault tolerance property.
Aboushady, A.   +3 more
core   +2 more sources

Manual Interventions for Musculoskeletal Factors in Infants With Suboptimal Breastfeeding: A Scoping Review

open access: yesJournal of Evidence-Based Integrative Medicine, 2018
Exclusive breastfeeding for the first 6 months, and continuing for at least the first year of life, is strongly recommended. Suboptimal breastfeeding, which is breastfeeding that does not meet these recommendations, is a multifactorial issue.
Cheryl Hawk DC, PhD   +4 more
doaj   +1 more source

Polynomial Curve Slope Compensation for Peak-Current-Mode-Controlled Power Converters [PDF]

open access: yes, 2019
Linear ramp slope compensation (LRC) and quadratic slope compensation (QSC) are commonly implemented in peak-current-mode-controlled dc-dc converters in order to minimize subharmonic and chaotic oscillations.
Deng, Xu   +5 more
core   +2 more sources

DC/DC converters based on hybrid MMC for HVDC grid interconnection [PDF]

open access: yes, 2015
This paper presents a multi-terminal high-power DC/DC converter configuration based on hybrid MMC topology with fault blocking capability for interconnecting HVDC systems.
Xu, Lie, Yao, Liangzhong, Zeng, Rong
core   +1 more source

Variant Anterior Digastric Muscle Transfer for Marginal Mandibular Branch of Facial Nerve Palsy

open access: yesPlastic and Reconstructive Surgery, Global Open, 2014
Summary: Marginal mandibular branch of facial nerve (MMBFN) palsy is a common consequence of head and neck surgeries. MMBFN palsy results in paralysis of muscles which depress the inferior lip.
Matthew J. Zdilla, DC
doaj   +1 more source

VLSI hybrid DC-DC regulator [PDF]

open access: yes2015 European Conference on Circuit Theory and Design (ECCTD), 2015
Hybrid DC-DC regulators are structures that combine both a linear voltage regulator and a switching DC-DC converter. The main objective of this hybrid topology is to converge, in a single circuit topology, the best of both alternatives: a small voltage output ripple, which is a common characteristic of linear regulator circuits, and good energy ...
Cosp Vilella, Jordi   +1 more
openaire   +2 more sources

Review of dc-dc converters for multi-terminal HVDC transmission networks [PDF]

open access: yes, 2016
This study presents a comprehensive review of high-power dc-dc converters for high-voltage direct current (HVDC) transmission systems, with emphasis on the most promising topologies from established and emerging dc-dc converters.
Ased, Grain Philip   +4 more
core   +1 more source

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