Results 81 to 90 of about 591 (257)

Design and Optimization of Modular Solid Rocket Grain Matching Multi-Thrust Performance Curve

Applied Sciences
Multi-thrust solid rocket motors are extensively used in tactical missiles. To effectively achieve the desired multi-thrust performance curve, firstly, the concept of modular grain is introduced.
Wentao Li, Yunqin He, Yiyi Zhang, Guozhu Liang   +3 more
doaj   +1 more source

Optimization design of anti-creep reinforcement structure for solid rocket motor propellant grain

Jixie qiangdu
To address the creep issue that arises during the long-term vertical storage of solid rocket motor (SRM), a method was proposed that involved embedding a specially shaped functional combustible core model (reinforcement structure)into the propellant ...
LIU Mengyang, GAO Jingwei, YAN Bo, ZHANG Xiaofei   +3 more
doaj  

Developmental morphology of claspers and clasper‐glands during maturation in Potamotrygon wallacei (Chondrichthyes: Potamotrygoninae)

The Anatomical Record, EarlyView.
Abstract The claspers are the copulatory organs in male elasmobranchs, responsible for directing the semen into the female cloaca (C). However, the microscopic morphology of the claspers remains poorly understood. This study describes the morphology of the claspers and clasper glands (CGs) of cururu stingray (Potamotrygon wallacei) at different ...
Matheus Samuel Cunha Braga, Grazyelle Sebrenski da Silva, Maria Inês Braga de Oliveira, Jaydione Luiz Marcon, Ruben Dario Morales Gamba   +4 more
wiley   +1 more source

The Analytical Method to Compute the Strain on the Soft PSD in Double-Pulse SRM

International Journal of Aerospace Engineering, 2019
In order to obtain the analytical method to compute the circumferential strain on a soft pulse separation device (PSD), deformation processes of the middle section of the soft PSD, the medicine propellant grain and the case are simplified into a two ...
Chunguang Wang, Guiyang Xu
doaj   +1 more source

Morphophysiological dynamics of the proximal post‐testicular ducts in Crotalus durissus Linnaeus, 1758 (Squamata: Viperidae)

The Anatomical Record, EarlyView.
Abstract The organization and function of reptilian excurrent ducts remain poorly characterized, particularly in Neotropical snakes. We provide the first integrative morphological, histochemical, immunohistochemical, and ultrastructural analysis of the proximal post‐testicular ducts of Crotalus durissus across reproductive stages.
Flávia Cappuccio de Resende, Gustavo Caldeira Cotta, Clara d' Ávila Fonseca Paiva de Paula Freitas, Leonardo Carvalho, Heloísa Helena Marques Oliveira, Victória Gomes Carvalho Silva, Lívia de Fátima Moreira Silva, Luciana Maria Silva, Samyra Maria dos Santos Nassif Lacerda, Guilherme Mattos Jardim Costa   +9 more
wiley   +1 more source

Twenty years of inhaler therapy: A nationwide drug utilization study

British Journal of Clinical Pharmacology, EarlyView.
Aims This study aimed to map nationwide trends and prescribing patterns in inhaler use from 2004 to 2023. In light of evolving clinical guidelines and attention to the environmental impact of inhalers within recent years, we also examined variation in prescribing behaviour and patient‐level treatment choices. Methods Using nationwide health registries,
Katrine Bitsch Johansen, Lars Christian Lund, Zandra Nymand Ennis, Andrew Scourfield, Anders Løkke, Sidsel Arnspang Pedersen   +5 more
wiley   +1 more source

Analysis of structural deformation and damage in accelerated aging NEPE propellant grain

Jixie qiangdu
ObjectiveTo investigate the effects of accelerated thermal aging and grain geometry on the mechanical response of nitrate ester plasticized polyether (NEPE) propellant grains under storage and ignition conditions, the influences of aging state ...
NING Yuhao, LI Yonghua, QIAN Gui’an, LIU Xiaohan, SUN Jianjun, WU Guoqing, SUN Jingyu   +6 more
doaj  

Interactive Framework on Absorptive Capacity and Organizational Learning for Circular Economy Transition

Business Strategy and the Environment, EarlyView.
ABSTRACT The transition to a circular economy (CE) requires organizations to move beyond linear production systems toward regenerative, resource‐efficient models. For small and medium‐sized enterprises (SMEs), this transition is especially demanding due to constrained financial, technological, and human resources.
Hadi Zarea
wiley   +1 more source

Green Entrepreneurship Research: A Review of the Domain and Future Research Agenda

Business Strategy and the Environment, EarlyView.
ABSTRACT This study examined the evolving landscape of green entrepreneurship (GE) research through a comprehensive analysis that combined bibliometric and systematic literature reviews. Analysis of 88 articles retrieved from the Web of Science (WoS) mapped the research trajectory, identifying key authors, journals and research themes.
Clavis Nwehfor Fubah, Jonathan Mukiza Kansheba, Mutaju Isaack Marobhe, Gaye Acikdilli   +3 more
wiley   +1 more source

State of the propulsive-group development for enhanced anti-armored guided missile [PDF]

Scientific Technical Review, 2018
The main propulsive group of anti-armor guided missile is reinforced by additional propulsive group with the aim to increase the range. Final concept of the propulsion has been adopted after consideration of several proposed solutions.
Marjanović Goran, Kozomara Stevan, Stojković Srđan, Gligorijević Nikola, Živković Saša, Pavković Bojan   +5 more
doaj