Results 71 to 80 of about 10,294 (296)

Structural insights and therapeutic targets in Acinetobacter baumannii capsule biosynthesis

open access: yesFEBS Letters, EarlyView.
Hypervirulent KL49 A. baumannii's capsular polysaccharide contains the nonulosonic acid 8‐epi‐Leg5,7Ac2, synthesized by epimerization via ElaA, ElaB, and ElaC. Crystal structures of ElaA, ElaB, and ElaC reveal their role in CMP‐Leg5,7Ac2 synthesis and regioselective C8 epimerization.
Woo Cheol Lee   +7 more
wiley   +1 more source

Design and Kinematics of a Parallel Manipulator for Manufacturing [PDF]

open access: yes, 1997
This paper presents a new model of parallel manipulator for manufacturing, whose mechanism comes from the general Stewart platform which has the advantages of high rigidity and high load capacity.
Zhao MY(赵明扬)   +4 more
core  

Kinematic analysis of 3-PRPPS spatial parallel manipulator with circularly guided base for singularity-free robotic motions [PDF]

open access: yes
Robot manipulators are classified as serial manipulators and parallel manipulators. Parallel manipulators are classified into planar and spatial parallel manipulators (SPMs).
Himam Saheb Shaik, Shaik, H.S.
core   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

open access: yesFEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source

Workspace Investigation of a Novel Parallel Manipulator [PDF]

open access: yes, 2009
The manipulator workspace denotes the work area of a manipulator and it is an important foundation of designing a robot. The workspace of a novel symmetrical 4-DOF 3-RRUR parallel manipulator is researched here based on the inverse solution.
Fengfeng Xi   +4 more
core   +1 more source

Analysis and Design for 3-RPRR Similarly Planar Fully Compliant Parallel Manipulator

open access: yesJixie chuandong, 2015
A fully compliant parallel manipulator can achieve multi-dimensional motions,but it has obvious limitations in the micro-position fields for the structure and size.A new mechanism which is called 3-RPRR similarly planar fully compliant parallel ...
Zhu Dachang, Li Yan, Zhang Tao
doaj  

Mechanism Design and Simulation Analysis of Hybrid Serial-Parallel Underwater Dredging Manipulator

open access: yes水下无人系统学报
In recent years, underwater robots have emerged as a novel solution for the removal of sediments at the bottom of reservoirs, with underwater manipulators being the primary tool for dredging operations.
Yin XIA   +4 more
doaj   +1 more source

Design and analysis strategies for robust microbiome ageing research

open access: yesFEBS Letters, EarlyView.
The gut microbiome changes with age and associates with age‐related morbidity and mortality, establishing it as a potential biomarker and intervention target for ageing. Realising this potential requires methodological rigour, yet distinguishing biological signals from methodological artefacts remains challenging across cohorts. This review provides an
Mark Olenik   +5 more
wiley   +1 more source

Kinematic analysis of 3-cru translational parallel manipulator [PDF]

open access: yes, 2010
碩士本文將提出一種新型式的三自由度純平移並聯式機械手臂,此並聯機構主要是由固定於基座的圓柱接頭、連接肢幹上兩桿件的旋轉接頭、與連接活動平台的萬向接頭所組成,簡稱為3-CRU平移型並聯式機械手臂。 在運動分析方面,本論文首先根據此並聯式機械手臂之組裝條件推導出運動限制,共有三條多項式方程組,可尋找出正逆向運動分析之閉合解(closed-form solutions),接著再利用逆向運動分析去驗証正向運動學的正確性。最後,再進一步分析此機構在不同高度時工作空間之區域範圍。A new 3 degree-of ...
吳承學; Wu, Cheng-syue
core  

Lightweight design and encoderless control of a miniature direct drive linear delta robot [PDF]

open access: yes, 2013
This paper presents the design, integration and experimental validation of a miniature light-weight delta robot targeted to be used for a variety of applications including the pick-place operations, high speed precise positioning and haptic ...
Tarik E. Kurt   +5 more
core   +1 more source

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