Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Frictional Forces on Screws01:17

Frictional Forces on Screws

1.2K
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
1.2K
Self-Locking Screw01:16

Self-Locking Screw

1.6K
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
1.6K
Design Consideration01:22

Design Consideration

186
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
186
Screw: Problem Solving01:21

Screw: Problem Solving

415
In mechanical engineering, the interaction between a threaded screw shaft and a plate gear involves analyzing the resisting torque on the plate gear that can be overpowered when a specific torsional moment is applied to the shaft. To better comprehend this concept, consider a generic situation with a threaded screw shaft with a given mean radius and lead and a plate gear with a specified mean radius. The coefficient of static friction between the screw and gear is also provided.
To evaluate the...
415
Machines: Problem Solving I01:22

Machines: Problem Solving I

324
A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
324
Stress Concentrations in Circular Shafts01:18

Stress Concentrations in Circular Shafts

175
Consider the elastic torsion formula, which applies to a circular shaft with a consistent cross-section. This formula assumes that the shaft's ends are loaded with rigid plates firmly attached. However, in many cases, torques are applied to the shaft through mechanisms like flange couplings or gears, which are connected by keys inserted into keyways. This application method modifies the stress distribution near the point of torque application, causing it to deviate from the distributions...
175

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Intraoperative warning signs of a cystic duct entering the right hepatic duct during laparoscopic cholecystectomy: a case report.

Journal of surgical case reports·2026
Same author

Effects of a head-up position on stone retrieval efficiency and intrarenal pressure using a flexible navigable suction access sheath: an in vitro study.

Urolithiasis·2026
Same author

Laparoscopic Intraperitoneal Onlay Mesh Plus Repair of a Hernia Adjacent to a Vesicocutaneous Urinary Diversion: A Case Report.

Surgical case reports·2026
Same author

Artificial Intelligence-Based Objective Evaluation of Nerve-Sparing Status Combined With Preserved Urethral Length Predicts Urinary Continence Recovery After Robot-Assisted Radical Prostatectomy.

International journal of urology : official journal of the Japanese Urological Association·2026
Same author

The in vitro acquisition of CD11a by gastric cancer cells after contact with T cells via trogocytosis increases adhesion to endothelial cells.

Experimental cell research·2026
Same author

A Rare Case of Small Bowel Volvulus with Chylous Ascites Presumed to Be Caused by Multiple Congenital Adhesions in a Virgin Abdomen: A Case Report and Literature Review.

Surgical case reports·2026

相关实验视频

Updated: Jul 4, 2025

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
07:53

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates

Published on: April 27, 2019

8.3K

较低的平均关闭负载和较小的负载变化在尖端增加了剪刀的舒适性.

Gaku Ota1, Yuji Kaneda1,2, Yoshitaka Maeda2

  • 1Department of Surgery, Jichi Medical University, Division of Gastroenterological, General and Transplant Surgery, Shimotsuke, JPN.

Cureus
|February 9, 2024
PubMed
概括

外科医生更喜欢手术剪刀,它需要更少的力量来关闭,并且在尖端呈现最小的负载变化. 这些物理特征是制定外科器械客观质量控制标准的关键.

关键词:
库珀剪刀公司康赛工程工程公司 康赛工程公司质量控制质量控制质量控制手术仪器是指外科手术仪器.默认的知识是默认的知识.

更多相关视频

Performing Microscope-Mounted Y-Shaped Cutting Tests
06:15

Performing Microscope-Mounted Y-Shaped Cutting Tests

Published on: January 20, 2023

1.8K
Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses
03:07

Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses

Published on: October 11, 2024

510

相关实验视频

Last Updated: Jul 4, 2025

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates
07:53

Cutting Procedures, Tensile Testing, and Ageing of Flexible Unidirectional Composite Laminates

Published on: April 27, 2019

8.3K
Performing Microscope-Mounted Y-Shaped Cutting Tests
06:15

Performing Microscope-Mounted Y-Shaped Cutting Tests

Published on: January 20, 2023

1.8K
Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses
03:07

Scanning Electron Microscopic Evaluation of Surface Defects of Remover Retreatment File After Single and Multiple Uses

Published on: October 11, 2024

510

科学领域:

  • 外科手术仪器仪表的使用
  • 生物机械工程 生物机械工程
  • 材料科学 材料科学 材料科学

背景情况:

  • 外科医生经常依靠触觉反来评估手术剪刀的度和可用性.
  • 缺少外科剪刀的客观质量控制标准,尽管直观地识别了枯燥的仪器.

研究的目的:

  • 客观地评估外科剪刀的物理特性.
  • 为了将这些物理特性与外科医生报告的舒适性相关联.
  • 为手术剪刀建立客观的质量控制标准.

主要方法:

  • 31名外科医生的感官评估对库珀剪刀的舒适性进行了评价.
  • 在剪刀关闭过程中测量负载压力和手柄位移.
  • 舒适度得分与机械测量之间的相关性分析.

主要成果:

  • 外科医生舒适度和关闭剪刀所需的平均负载之间存在强烈的负相关性 (r=-0.717).
  • 在舒适度和剪刀尖负载变化之间发现了中等负相关性 (r=-0.687).
  • 尖端负荷的变化被确定为影响外科医生舒适性的独立因素.

结论:

  • 外科医生的舒适性与较低的平均关闭负载和剪刀尖的负载变化减少直接相关.
  • 外科剪刀的客观质量控制应该包括平均负载和尖端负载变化指标.
  • 这些发现可以指导开发卓越的外科剪刀设计和制造标准.