Results 131 to 140 of about 11,940,761 (361)

Developments in REDES: The Rocket Engine Design Expert System [PDF]

open access: yes
The Rocket Engine Design Expert System (REDES) was developed at NASA-Lewis to collect, automate, and perpetuate the existing expertise of performing a comprehensive rocket engine analysis and design.
Davidian, Kenneth O.
core   +2 more sources

Naked cuticle is essential for Drosophila wing development beyond Wingless signaling

open access: yesFEBS Open Bio, EarlyView.
Naked cuticle (Nkd), a Wnt signaling inhibitor, assumes extensive roles in Drosophila wing development. Overexpressing Nkd causes smaller, crumpled wings, while also perturbing multiple signaling pathways and developmental genes. A specific region (R1S) is critical for Nkd's function as a signaling integrator, offering new insights for studying its ...
Rui Wang, Ping Wang
wiley   +1 more source

Modeling of Geometric Parameters⁃Components‑Overall Performance in Turboshaft Engines and Their Applications

open access: yesNanjing Hangkong Hangtian Daxue Xuebao
Aiming at the problem of performance dispersion of domestic turboshaft engines in batch production, a model-building method integrating manufacturing geometric parameters, component performance, and overall engine performance is proposed.
LI Zeqi   +4 more
doaj   +1 more source

Orbit transfer vehicle engine study. Volume 1: Executive summary [PDF]

open access: yes
The orbit transfer vehicle (OTV) engine study provided parametric performance, engine programmatic, and cost data on the complete propulative spectrum that is available for a variety of high energy, space maneuvering missions.

core   +1 more source

Navigating new norms: a systematic review of factors for the development of effective digital tools in higher education

open access: yesFEBS Open Bio, EarlyView.
What factors make for an effective digital learning tool in Higher Education? This systematic review identifies elements of a digital tool that published examples reveal to be features of an engaging and impactful digital tool. A systematic literature search yielded 25 research papers for analysis.
Akmal Arzeman   +4 more
wiley   +1 more source

A Comparative Study on Optimal Engine-Start Performance of Parallel Hybrid Electric Vehicles With Various Starter Motors

open access: yesIEEE Access
Pre-transmission parallel hybrid electric vehicles (HEVs) have various architectures, depending on the type and size of the engine-starter motor. Such architectural variations pose a design trade-off between cost and engine-start performance.
Jaeyoon Kim   +3 more
doaj   +1 more source

Performance Engine 1108 Cc Menggunakan Bahan Bakar Ron 88 dan Ron 92 [PDF]

open access: yes, 2019
This experimental study aims to compare the performance and Spesific Fuel Consumsion (Sfc) where were produced from RON 88 fuel and RON 92 fuel with T101D Automotive engine test bed, with optionals tool. Engine gasoline type 1.1 8V was used in this study.
Nofriyandi.R, Nofriyandi.R   +2 more
core  

Down‐regulation of Shh in the hair follicles of mice during chemotherapy‐induced hair loss is mediated by the JAK/STAT1 signaling pathway

open access: yesFEBS Open Bio, EarlyView.
We found that during chemotherapy‐induced alopecia (CIA), Sonic hedgehog (Shh) expression significantly decreased in hair follicle Shh+ cells, whereas the Janus‐activated kinase/signal transducer and activator of transcription 1 (JAK/STAT1) signaling pathway was markedly activated.
Ruifang Fan   +6 more
wiley   +1 more source

Performance Engineering

open access: yes
This open access book improves the users' skills needed to implement models for performance evaluation of digital infrastructures. Building a model is usually a relatively easy task, but making it an accurate representation of the phenomenon to be reproduced is a completely different matter.
openaire   +2 more sources

Program for refan JT8D engine design, fabrication and test, phase 2 [PDF]

open access: yes
The objective of the JT8D refan program was to design, fabricate, and test certifiable modifications of the JT8D engine which would reduce noise generated by JT8D powered aircraft.
Glass, J. A.   +2 more
core   +1 more source

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