Results 31 to 40 of about 21,973 (221)
Sampling, Mobility, and Anchoring in Small‐Body Sampling Robots: A Comprehensive Review
SmartBot, EarlyView.Small‐body sampling robots are exploration systems that perform contact, sampling, and stable operations on microgravity bodies such as asteroids and comets. The authors review representative robot architectures and key technologies, focusing on the mechanisms, evolution, and coupling of sampling, mobility, and anchoring.
Yurui Shen +7 more
wiley +1 more source
When does category spanning hurt or help producers?
Strategic Management Journal, EarlyView.Abstract Research Summary Scholars have theorized many factors shaping whether category spanning helps or hurts producers. We first synthesize evidence by meta‐analyzing 25 years of empirical research, which reveals a null effect of spanning on average, yet with significant subsample heterogeneity. To unpack it, we theorize and find that spanning hurts
Jungsoo Ahn +2 more
wiley +1 more source
Numerical Simulation of Ionospheric Disturbance Generated by Ballistic Missile
Advances in Mathematical Physics, 2019 To provide theoretical guidance for the detection of ballistic missiles by skywave over-the-horizon radar, this paper first analyses the best way to detect ballistic missiles based on the rocket detection mechanism.
Jinyuan Zhu +4 more
doaj +1 more source
AIP Advances, 2023 To determine the high dynamic change characteristics of the relative space position between a ballistic missile and an early warning satellite during detection, a centric motion model of the ballistic missile and the early warning satellite are ...
Taotao Zhang, Weiyi Chen, Dengjian Fang
doaj +1 more source
Small, EarlyView.A one‐step oblique angle reactive sputtering approach enables simultaneous tuning of bulk and interfacial stoichiometry in a metal oxide/ silicon heterojunction. In case of vanadium oxides, growth angle variation controls the formation of stoichiometric SiO2, ternary SiOx(V) interlayer, and phase purity of vanadium oxide, considerably simplifying the ...
Aparajita Mandal +3 more
wiley +1 more source
Cooperative control method of multi-missile formation under uncontrollable speed
Xibei Gongye Daxue Xuebao, 2021 Under the missile speed is uncontrollable, a design method of multi-missile formation flight controller based on the sliding mode variable structure control theory and adaptive dynamic surface control theory is proposed.
doaj +1 more source
Carrying a Big Carrot: Linking Multilateral Disarmament and Development Assistance [PDF]
, 1991 This article proposes, as a new element of the liberal internationalism that should characterize the post-Cold War world, a simultaneous solution to these three problems.
Koplow, David A., Schrag, Philip G.
core +2 more sources
Systems Research and Behavioral Science, EarlyView.ABSTRACT This paper draws on over five decades of experience in educating and developing systems thinking practitioners at the Open University (OU) UK to explore the opportunities and challenges in the professionalisation of systems thinking in practice (STiP).
Ray Ison
wiley +1 more source
Flight Path Angle Steering with Lambert Guidance Reference [PDF]
فصلنامه علوم و فناوری فضایی, 2010 In this paper a new guidance technique for ballistic missiles and launch vehicles is proposed. Generally the Lambert guidance is used to generate missile nominal (correlated) parameters through powered flight to put it in a ballistic flight path. Because
R Zardashti, M Bagherian
doaj
steel research international, EarlyView.The high‐strain‐rate behavior of resistance spot‐welded DP800–DP1000 joints is investigated. Results show that microstructural gradients across BM–HAZ–FZ govern hardness, strain rate sensitivity, and failure modes. While strength increases with strain rate, energy absorption is controlled by ductility, with DP800–DP800 joints showing superior ...
Pankaj Shrivastava, Velaphi Msomi
wiley +1 more source