Results 111 to 120 of about 44,878 (304)

Investigating the Performance of Polytetrafluoroethylene and Polyoxymethylene Creasing Rules in the Package Conversion of Coated Paperboard

Packaging Technology and Science, EarlyView.
Two sets of creasing tools were designed and machined from polytetrafluoroethylene (PTFE) and polyoxymethylene (POM) in this study to improve the creasability of commercial dispersion‐coated paperboard. Their performance was evaluated by measuring the oil and grease resistance of the samples before and after creasing/folding and comparing the results ...
Roman Lev, Antti Pesonen, Johanna Lyytikäinen, Panu Tanninen, Ville Leminen   +4 more
wiley   +1 more source

Flexibility effects on tooth contact location in spiral bevel gear transmissions [PDF]

An analytical method to predict the shift of the contact ellipse between the meshing teeth in a spiral bevel gear set is presented in this report. The contact ellipse shift of interest is the motion of the nominal tooth contact location on each tooth ...
Altidis, P. C., Savage, M.
core   +1 more source

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

SmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen, Zeyuan Huang, Ying Yan, Xiaokang An, Zhikai Zhao, Jirong Lin, Xiangrong Zhao, Xianyuan Gao, Junyi Zong, Xuewen Jia, Zhipeng Yao, Jianliang Liao, Ning Ji   +12 more
wiley   +1 more source

Tooth Contact Analysis and Experimental Verification of Oerlikon Cycloidal Hypoid Gear

Jixie chuandong, 2015
A mathematical model is established for the whole tooth surface generation of the Oerlikon cycloidal hypoid gear,which includes the work flank and the tooth base surfaces,based on it,the tooth 3D model is obtained.
Du Jinfu, Fang Zongde, Yue Guiping, Gao Hongbiao, Zhao Guorui   +4 more
doaj  

Quantitative micro‐XRF combined with X‐ray imaging reveals correlations between Zn concentration and dentin tubule porosity across entire teeth

VIEW, EarlyView.
The combination of calibrated micro‐CT and quantitative micro‐XRF measurement facilitates the correlation of density and composition in the 3D macro‐structure of teeth. Zn concentration in dentin increases by a factor of 10 toward the pulp. Incidentally, the overall density decreases, showing an association between Zn and the dentin tissue porosity ...
Ioanna Mantouvalou, Leona Johanna Bauer, Vinh‐Binh Truong, Yannick Wagener, Frank Förste, Oleksandra Marushchenko, Stephan Werner, Franco Lizzi, Frank Wieder, Timo Wolff, Birgit Kanngießer, Paul Zaslansky   +11 more
wiley   +1 more source

Analysis and modification of a single-mesh gear fatigue rig for use in diagnostic studies [PDF]

A single-mesh gear fatigue rig was analyzed and modified for use in gear mesh diagnostic research. The fatigue rig allowed unwanted vibration to mask the test-gear vibration signal, making it difficult to perform diagnostic studies.
Decker, Harry J., Oswald, Fred B., Townsend, Dennis P., Zakrajsek, James J.   +3 more
core   +1 more source

Analysis of Flexural Strength and Contact Pressure After Simulated Chairside Adjustment of Pressed Lithium Disilicate Glass-Ceramic [PDF]

, 2018
Statement of problem Research evaluating load-to-failure of pressed lithium disilicate glass-ceramic (LDGC) with a clinically validated test after adjustment and repair procedures is scarce.
Berzins, David W., Maroulakos, Georgios, Ramadhan, Ali, Thompson, Geoffrey A.   +3 more
core   +1 more source

Chinese Guidelines for the Diagnosis and Surgical Treatment of Adult Obstructive Sleep Apnea (2024)

World Journal of Otorhinolaryngology - Head and Neck Surgery, EarlyView.
ABSTRACT Obstructive sleep apnea (OSA) is a common chronic disorder characterized by abnormal breathing during sleeping. OSA can damage various organs throughout the body and is burdensome, both socially and economically. Moreover, as OSA has been increasingly studied in recent years, new evidence‐based guidelines for its diagnosis and surgical ...
Working Group of Guideline for the Diagnosis and Surgical Treatment of Adult OSA, Subspecialty Group of Laryngopharyngology, Society of Otorhinolaryngology Head and Neck Surgery, Chinese Medical Association, Subspecialty Group of Voice, Society of Otorhinolaryngology Head and Neck Surgery, Chinese Medical Association, Editorial Board of Chinese Journal of Otorhinolaryngology Head and Neck Surgery   +7 more
wiley   +1 more source

Study on Meshing Characteristic of Face Gear Pair based on Pinion Modified by Continuous Shifting

Jixie chuandong, 2018
On the basis of processing principles of torus-involute gear,the longitudinal modification method based on continuous shifting is used for the pinion in the face gear drive,a modified face gear pair is obtained.
Zhang Jinzhao, Liu Lei
doaj  

Gearing [PDF]

Gearing technology in its modern form has a history of only 100 years. However, the earliest form of gearing can probably be traced back to fourth century B.C. Greece. Current gear practice and recent advances in the technology are drawn together.
Coy, J. J., Townsend, D. P., Zaretsky, E. V.   +2 more
core   +1 more source