Results 121 to 130 of about 292,725 (364)

Spacesuit mobility knee joints [PDF]

open access: yes, 1979
Pressure suit mobility joints are for use in interconnecting adjacent segments of an hermetically sealed spacesuit in which low torques, low leakage and a high degree of reliability are required.
Vykukal, H. C.
core   +1 more source

Development Status and Future Prospects of Hydrogen Energy Technology: Production, Storage, and Cost Analysis

open access: yesAdvanced Energy and Sustainability Research, EarlyView.
Hydrogen is an energy carrier, produced from renewable and nonrenewable resources. It can be stored in a variety of materials and transported to distant locations. This article reviews progress in hydrogen technology by looking at environmental and economic impact, cost analysis, and policy support at government level as way forward for bringing it to ...
Xuexue Pan   +5 more
wiley   +1 more source

Measured opening characteristics of an electromagnetically opened diaphragm for the Langley expansion tunnel [PDF]

open access: yes
Results from an experimental study of the opening characteristics of an electromagnetically opened, 15.24 cm diameter diaphragm are presented. This diaphragm consists of a polyester film bonded to a preformed wire and is opened by passing a current pulse
Moore, J. A.
core   +1 more source

External Validation of an Automated Surgical Step Recognition Model for Robotic Distal Gastrectomy (RDG) Using a Multicenter Dataset

open access: yesAnnals of Gastroenterological Surgery, EarlyView.
Our present study reveals that surgical step recognition performs moderately well when trained on video data from a single institution and applied to an external institution's data. Nevertheless, our model substantially improves its prediction capabilities when trained on the same amount of data from multiple institutions.
James S. Strong   +8 more
wiley   +1 more source

Simulation and Experimental Analysis of Stiffness and Damping of the Waist Type Diaphragm Coupling

open access: yesJixie chuandong
The stiffness and damping characteristics of the diaphragm coupling are the basis for analyzing the vibration characteristics of the shafting system with the diaphragm coupling.
Hong Yun   +4 more
doaj  

N.A.C.A. Recording Air Speed Meter [PDF]

open access: yes
A new type of air speed meter is described which was designed by the technical staff of the National Advisory Committee for Aeronautics. The instrument consists essentially of a tight metal diaphragm of high natural period which is acted upon by the ...
Norton, F H
core   +1 more source

Non‐Flap Tunnel Technique (NFTT): A Novel Minimally Invasive Reconstruction Method After Proximal Gastrectomy for Gastric and Esophagogastric Junction Cancer

open access: yesAnnals of Gastroenterological Surgery, EarlyView.
This study introduces the non‐flap tunnel technique (NFTT) as a simplified method for esophagogastrostomy following minimally invasive proximal gastrectomy. Compared with the conventional double‐flap technique, NFTT significantly reduces reconstruction time and the incidence of anastomotic stenosis, while maintaining comparable anti‐reflux outcomes ...
Masaru Hayami   +6 more
wiley   +1 more source

The Frequency Dependence of Critical-velocity Behavior in Oscillatory Flow of Superfluid Helium-4 Through a 2-micrometer by 2-micrometer Aperture in a Thin Foil

open access: yes, 2005
The critical-velocity behavior of oscillatory superfluid Helium-4 flow through a 2-micrometer by 2-micrometer aperture in a 0.1-micrometer-thick foil has been studied from 0.36 K to 2.10 K at frequencies from less than 50 Hz up to above 1880 Hz.
A. Amar   +27 more
core   +1 more source

Gastric Distension Index: A Novel Radiographic Marker Associated With Postoperative Gastric Stasis After Gastrectomy

open access: yesAnnals of Gastroenterological Surgery, EarlyView.
This study introduces the Hiki Index (HI), a novel radiographic metric based on upright abdominal X‐rays, to objectively assess postoperative gastric dilatation after gastrectomy. The HI demonstrated strong predictive value for gastrointestinal symptoms and the need for therapeutic intervention, offering a practical tool for early detection and ...
Hiroki Harada   +9 more
wiley   +1 more source

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