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材料的声子色散曲线（晶格振动频率与动量空间中波矢的关系）是描述晶格振动规律的重要图像，在理解材料的热传导、超导性质和结构相变等机制中发挥着关键作用。直接测量声子色散曲线要求测量手段具有高动量分辨能力，以区分不同波矢下的振动频率差异。早期研究者利用非弹性X射线/中子散射谱、高分辨反射式电子能量损失谱等技术对材料中的声子色散关系进行了大量研究。然而，由于入射源波长的限制，对局域纳米结构进行高空间分辨的...
Simultaneous expansion and harvest of hematopoietic stem cells and mesenchymal stem cells derived from umbilical cord blood
生物反应器 UCB MSCs RWV GCSC
2023/3/1
The simultaneous expansion and harvest of hematopoietic stem cells and mesenchymal stem cells derived from umbilical cord blood were carried out using bioreactors. The co-culture of umbilical cord blo...
Can early experiences with computers,robots increase STEM interest among young girls?
early experiences computers robots STEM interest young girls
2017/7/19
Girls start believing they aren’t good at math, science and even computers at a young age — but providing fun STEM activities at school and home may spark interest and inspire confidence.A study from ...
FOREST STEM VOLUME CALCULATION USING AIRBORNE LIDAR DATA
Aerial LiDAR nDSM tree height canopy height stand volume Pleaides multispectral image
2017/7/12
Airborne LiDAR data have been collected for the city of Istanbul using Riegl laser scanner Q680i with 400 kHz and an average flight height of 600 m. The flight campaign was performed by a ...
2017全球华人电脑教育应用大会子会议8：创客与STEM教育
全球华人电脑教育应用 大会
2017/3/21
国际上掀起「创客/自造者运动（Makermovement）」浪朝，「自已制造」的时代来临！创客运动已颠覆既有的教育体系及知识创新的途径。创客运动对教育的启示是「实做胜于理论」，许多学校纷纷成立创客空间（makerspace），培养学生实作及创新能力。自造精神需要推广，创客亦需教育与训练。
TREE STEM RECONSTRUCTION USING VERTICAL FISHEYE IMAGES: A PRELIMINARY STUDY
Dense Reconstruction Fisheye Image Rectification Photogrammetry
2016/11/11
A preliminary study was conducted to assess a tree stem reconstruction technique with panoramic images taken with fisheye lenses. The concept is similar to the Structure from Motion (SfM) technique, b...
FAST AND ROBUST STEM RECONSTRUCTION IN COMPLEX ENVIRONMENTS USING TERRESTRIAL LASER SCANNING
Terrestrial Laser Scanning Stem Detection Cylinder Fitting RANSAC Self-adaptive Cylinder Growing Point Cloud Sampling
2016/7/27
Terrestrial Laser Scanning (TLS) is an effective tool in forest research and management. However, accurate estimation of tree parameters still remains challenging in complex forests. In this paper, we...
For 2016 Week of Making, highlighting connections between informal STEM environments and learning
highlighting connections informal STEM environments learning
2016/6/22
The 2016 National Week of Making, an event with significant potential for science, technology, engineering and mathematics (STEM) education, starts today.The National Science Foundation (NSF) fun...
COMBINED TREE SEGMENTATION AND STEM DETECTION USING FULL WAVEFORM LIDAR DATA
LIDAR Analysis Segmentation Forestry Vegetation
2015/11/10
The study highlights a new method for the delineation of tree crowns and the detection of stem positions of single trees from dense airborne LIDAR data. At first, we combine a method for surface recon...
Engagement in STEM through robotics,mechatronics,cybersecurity and more
STEM robotics mechatronics cybersecurity
2015/7/13
NYU Polytechnic School of Engineering kicks off its Summer of STEM today. Science, technology, engineering and mathematics are the focus, with both teachers and students gaining new opportunities for ...
Use of nonparametric regression methods for developing a local stem form model
Norway spruce spline stem curve taper
2015/5/5
: A local mean stem curve of spruce was represented using regression splines. Abilities of smoothing spline
and P-spline to model the mean stem curve were evaluated using data of 85 carefully measur...
BIOMASS ESTIMATION OF INDIVIDUAL TREES USING STEM AND CROWN DIAMETER TLS MEASUREMENTS
Terrestrial laser scanning biomass tree measurements
2014/6/5
The objective of this study was to make preliminary investigations between accurately measured field biomasses and terrestrial laser scanning (TLS) measurements including tree crown and stem diameters...
ESTIMATION OF TREE STEM ATTRIBUTES USING TERRESTRIAL PHOTOGRAMMETRY
Measurement Image Algorithms Forestry Inventory Point Cloud Close Range Method
2014/4/28
The objective of this work was to create a method to measure stem attributes of standing trees on field plots in the forest using terrestrial photogrammetry. The primary attributes of interest are the...
Stem cell technology using bioceramics: hard tissue regeneration towards clinical application
Stem cell technology bioceramics hard tissue regeneration towards clinical application
2010/10/12
Mesenchymal stem cells (MSCs) are adult stem cells which show differentiation capabilities toward various cell lineages. We have already used MSCs for treatments of osteoarthritis, bone necrosis and b...
Artificial extracellular matrix for embryonic stem cell cultures: a new frontier of nanobiomaterials
Artificial extracellular matrix embryonic stem cell cultures frontier of nanobiomaterials
2010/10/12
Nanobiomaterials can play a central role in regenerative medicine and tissue engineering by facilitating cellular behavior and function, such as those where extracellular matrices (ECMs) direct embryo...