Results 101 to 110 of about 75,725 (379)

An Optimal Trade-off between Content Freshness and Refresh Cost

open access: yes, 2010
Caching is an effective mechanism for reducing bandwidth usage and alleviating server load. However, the use of caching entails a compromise between content freshness and refresh cost.
Cho   +7 more
core   +1 more source

A Semantic Focused Web Crawler Based on a Knowledge Representation Schema

open access: yesApplied Sciences, 2020
The Web has become the main source of information in the digital world, expanding to heterogeneous domains and continuously growing. By means of a search engine, users can systematically search over the web for particular information based on a text ...
Julio Hernandez   +2 more
semanticscholar   +1 more source

External Reflection From Two‐Photon Laser‐Printed Micromirrors Enables Photomechanical Actuation at a 90° Incident Angle

open access: yesAdvanced Functional Materials, EarlyView.
Light reflectance increases along incidence angle and transmittance significantly drops around 90‐degree incidence angle. Here, we report two‐photon laser printed micro mirrors that redirect the skimming light beam into normal light absorption. Using this technique, light‐driven micro walkers and grippers are demonstrated by using grazing incidence ...
Leilei Song, Jianfeng Yang, Hao Zeng
wiley   +1 more source

5 year-long monitoring of Barkley Canyon cold-seeps with the internet operated deep-sea crawler "Wally" [PDF]

open access: yes, 2016
Despite the technological advances of the last decades (e.g. ROVs, AUVs, cabled observatories), our knowledge of most deep-sea environments is still strongly limited by spatio-temporal sampling and observational capabilities.
Aguzzi, Jacopo   +9 more
core  

Bioprinting Organs—Science or Fiction?—A Review From Students to Students

open access: yesAdvanced Healthcare Materials, EarlyView.
Bioprinting artificial organs has the potential to revolutionize the medical field. This is a comprehensive review of the bioprinting workflow delving into the latest advancements in bioinks, materials and bioprinting techniques, exploring the critical stages of tissue maturation and functionality.
Nicoletta Murenu   +18 more
wiley   +1 more source

Crawling on the World Wide Web [PDF]

open access: yes, 2002
As the World Wide Web grows rapidly, a web search engine is needed for people to search through the Web. The crawler is an important module of a web search engine. The quality of a crawler directly affects the searching quality of such web search engines.
Fox, Edward A., Wang, Li
core  

Fibrillar Bundles as Fibrous Filler Materials for Attaining Cell Anisotropy in Bioprinting

open access: yesAdvanced Healthcare Materials, EarlyView.
Fibrillar bundles are introduced as a bioprintable additive that enables robust and scalable cellular alignment within 3D constructs through flow‐induced orientation during extrusion. These fibers support strong cell adhesion and polarization across various cell types and significantly enhance myotube alignment in Gelatine‐Methacryloyl (GelMA ...
Sven Heilig   +10 more
wiley   +1 more source

Research and design of distributed high-performance network reptiles based on cloud platform

open access: yesDianxin kexue, 2017
With the arrival of large data age,data has become the most valuable resource.And web crawler technology as an important means of external data collection,has become a standard tool for data analysis.A high-performance,convenient cloud-based crawler ...
Enming SHI, Xiaojun XIAO, Yu LU
doaj   +2 more sources

A mathematical model for safety assessment of crawler logging

open access: yesAdvances in Mechanical Engineering, 2017
Horizontal well production technology is an increasingly important method to improve oil recovery. However, with the intensification of oil production, the problem of high water content in horizontal wells becomes more serious and causes oil recovery to ...
Biwei Fu   +4 more
doaj   +1 more source

Tunable Enhancement of T Cell Expansion Through Modulation of Stiffness and Adhesion Receptor Engagement in an Engineered Hydrogel Platform

open access: yesAdvanced Materials, EarlyView.
We develop a hydrogel scaffold with controlled substrate stiffness and ligand functionalization for cell culture. Stiff substrates presenting CD3/CD28/CD2 ligands induce 2000‐fold expansion of T cells; this is 68% greater than the clinical standard (Dynabeads) and the first hydrogel capable of large‐scale expansion. Although expanding at a lower yield,
Niroshan Anandasivam   +5 more
wiley   +1 more source

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