Results 141 to 150 of about 250,137 (314)

Temperature Field Analysis of Grinding Face Gear

open access: yesJixie chuandong, 2019
The principal directions and corresponding curvatures at grinding point on face gear tooth surface are derived according to meshing theory and differential geometry theory. Based on instantaneous elliptic contact theory and grinding heat theory, the theoretical formula of grinding temperature field of face gear is established.
Ning Zhao   +4 more
openaire   +1 more source

Clamping assembly for inertial components Patent [PDF]

open access: yes, 1968
Inertial component clamping assembly design for spacecraft guidance and control system ...
Denaci, D. E.   +2 more
core   +1 more source

T. rex cognition was T. rex‐like—A critical outlook on diverging views of the neurocognitive evolution in dinosaurs

open access: yesThe Anatomical Record, EarlyView.
Abstract A recent debate has emerged between Caspar et al. (2024) and Herculano‐Houzel (2023) on inferring extinct dinosaur cognition by estimating brain neuron counts. While thought‐provoking, the discussion largely overlooks the function of cognition, as well as partly neglects the difficulties involved in estimating neuron numbers, which according ...
Thomas Rejsenhus Jensen   +7 more
wiley   +1 more source

The design and development of a spacecraft appendage tie down mechanism [PDF]

open access: yes, 1985
The design and evolution is described of a spacecraft Appendage Tie Down Mechanism (ATDM). Particular emphasis is paid to the mechanical aspects of using dry lubricants to increase the efficiency of acme threads and worm gearing.
Head, R., Nygren, W. D.
core   +1 more source

Community intermediary strategies and tactics to close digital divides and enhance equitable technology use in everyday life

open access: yesJournal of the Association for Information Science and Technology, EarlyView.
Abstract Online technologies are required for accessing essential services, such as healthcare, transportation, and education. Challenges to online technology access can prevent resource‐constrained communities from connecting to these services. Human intermediaries who act in the middle space between technology and the person using the technology may ...
Marcy G. Antonio   +4 more
wiley   +1 more source

Parenting Stress and Stressful Life Events Among Caregivers of Toddler Siblings of Autistic and Non‐Autistic Children

open access: yesAutism Research, EarlyView.
ABSTRACT This study measured experiences of parenting stress and stressful life events in caregivers of families with a toddler who has either an autistic or non‐autistic older sibling(s). Caregivers of toddlers (12–18 months old) with older autistic siblings (Sibs‐autism; n = 58) and toddlers with older non‐autistic siblings (Sibs‐NA; n = 46 ...
Jennifer E. Magnuson   +9 more
wiley   +1 more source

Gear Fault Detection Effectiveness as Applied to Tooth Surface Pitting Fatigue Damage [PDF]

open access: yes
A study was performed to evaluate fault detection effectiveness as applied to gear tooth pitting fatigue damage. Vibration and oil-debris monitoring (ODM) data were gathered from 24 sets of spur pinion and face gears run during a previous endurance ...
Dempsey, Paula J.   +3 more
core   +1 more source

Looking for Shelter [PDF]

open access: yes, 2014
Narrative essay on a camping expedition to the top of Blood Mountain that was one to ...
Fowler, Joseph C
core   +1 more source

A pipeline crisis or a sustainability crisis? Local and national succession planning for headteachers in England

open access: yesBritish Educational Research Journal, EarlyView.
Abstract Recruiting and retaining school leaders is a challenge in many systems worldwide. Previous research has identified three distinct ways in which succession planning can be conceptualised and approached: a ‘pipeline’ approach seeks to match supply and demand for the posts that need filling; a ‘pool’ strategy involves proactively identifying and ...
Toby Greany   +3 more
wiley   +1 more source

面齿轮新型齿面结构弯曲强度计算机仿真分析

open access: yesJixie chuandong, 2011
Flexural strength is a principal factor that defines the fatigue life of face gear.A new tooth structure with circular arc of fillet part for the face gear tooth are developed and a shaper with tooth rounded top is applied to generate the fillet part of ...
吴学辉, 沈云波
doaj  

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