检索结果-内蒙古大学图书馆

IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)

作者： Yeqian Liu Haonan Li Zitao Feng Zejingqiu Chen Muyang Zhang Jie Zhou Qinghao He Huiru Zhang Tao Jiang Weijin Guo Department of Biomedical Engineering Shantou University Shantou China Department of Electronic Engineering Shantou University Shantou China Department of Biology Shantou University Shantou China Guangdong Foshan Lianchuang Graduate School of Engineering Foshan China

ISBN: (数字)9798350359831

ISBN: (纸本)9798350359848

As an emerging microtechnology, microneedles have been widely used for liquid sampling and drug delivery. Here, we fabricate a hollow microneedle array by diffraction lithography of OSTE, which can easily control the features of microneedles, including height, diameter, and pitch distance. Furthermore, we integrate the microneedle array with a soft PDMS microfluidic chip, which can generate negative pressure for liquid collection from the skin, as well as positive pressure for liquid delivery into the skin by finger pressure. In addition, we have tested the performance of the integrated chip in terms of repeatability and capacity. We believe this work can provide design guidelines for hollow microneedle chips used for sample collection from skin and drug delivery through skin.

关键词： Fabrication Liquids Nanoelectromechanical systems Fingers Point of care Lithography Skin

来源：评论

学校读者我要写书评

暂无评论

Light Gradient Boosting Machine-Based Fatality Prediction of Single-Vehicle Motorcycle Crashes

Light Gradient Boosting Machine-Based Fatality Prediction of...

引用

IEEE International Conference on Communication, Networks and Satellite (ComNetSat)

作者： Dodi Zulherman Jia Yang Kosuke Shimizu Yasunari Yokota Graduate School of Engineering Gifu University Gifu Japan Dept. of Biomedical Engineering Telkom University Purwokerto Indonesia Toyota Transportation Research Institute (formerly) Aichi Japan Faculty of Engineering Gifu University Gifu Japan

ISBN: (数字)9798350368086

ISBN: (纸本)9798350368093

In this study, we utilized the light gradient boosting machine (LightGBM) model for prediction analysis of single-vehicle motorcycle crash fatality in Japan. We develop the model using Japan’s traffic crash data from 2019 to 2022. Since the single-vehicle motorcycle crash dataset has an imbalanced distribution property between fatal and non-fatal accidents, it has difficulty predicting fatal cases due to predicting bias on non-fatal cases. To address this issue, we observed the effect of resampling techniques such as Synthetic Minority Oversampling Technique (SMOTE), Edited Nearest Neighbors (ENN), and SMOTE-ENN on the LightGBM prediction results. Furthermore, our LightGBM using Shapley additive explanations (SHAP) identified the most influential features in predicting single-vehicle motorcycle crash fatalities. The experiment based on evaluation metrics shows that combining LightGBM and resampling techniques significantly improved the model performance based on evaluation metrics such as accuracy, AUC, ROC curve and G-mean. This confirms the effectiveness of this approach in reducing the impact of the imbalanced dataset and improving single-vehicle motorcycle crash fatality predictions. Moreover, based on the SHAP value analysis, crash type, road alignment, collision manner, terrain, and motorcyclist age significantly affect the fatality of single-vehicle motorcycle crashes.

关键词： Measurement Analytical models Accuracy Satellites Roads Motorcycles Predictive models Boosting Data models Accidents

来源：评论

学校读者我要写书评

暂无评论

Design a Multifunctional Software for the Analysis of Biomechanical Stability of Bipedal Stance

SSRN

引用

SSRN 2024年

作者： Al-Ghali, Basma A. Jaber, Hussain A. Al-Saffar, Mais O. Çankaya, Ilyas Department of Biomedical Engineering College of Engineering Al-Nahrain University Baghdad Iraq Electrical and Electronics Engineering Department Graduate School of Natural Science Ankara Yıldırım Beyazıt University Ankara Turkey

Understanding the mechanisms of postural control is quite important for the evaluation of balance and stability, especially within both clinical and research environments. Center of pressure (CoP) signal is the commonly used for the assessment of postural stability. As the CoP signal is non-stationary, its analysis and interpretation are often challenging for clinicians and researches as well. This article describes a novel design of a computer-based application used for the analysis of CoP during standing stability tests. The application combines both traditional and advanced analytical techniques to evaluate postural control. The software was developed using python (ver 3.7.6), and the graphical user interface was built using tkinter library. The proposed software is designed to provide powerful tools for pre-processing, analyzing and visualizing CoP data in an easy to use and platform independent computer application. The software provides flexibility in importing data for different file formats (as a coordinate trace in anterio-posterior and mediolateral direction), different sampling frequencies, and various options of data filtering using low-pass Butterworth filter. Analysis methods incorporates standard measures including the mean and standard deviation of CoP displacements, ranges, and velocities, length of sway path, and the area of 95 % confidence ellipse. Furthermore, other advanced measures including approximate entropy (ApEn), wavelet transform of spectra, and DFA. The results are visualized numerically and graphically (CoP path, confidence ellipse area, and DFA) using matplotlib library. In addition, the user can export the statistical results as a text format. Converted to a standalone executable file using PyInstaller, this software offers a portable solution for CoP analysis over various computing environments. By combining traditional measures with nonlinear analytical techniques, this tool provides researchers and clinicians with a comprehensive

关键词： Butterworth filters

来源：评论

学校读者我要写书评

暂无评论

Unveiling complex catalytic reaction via multifunctional THz nanostructure

Unveiling complex catalytic reaction via multifunctional THz...

引用

2024 Conference on Lasers and Electro-Optics/Pacific Rim, CLEO-PR 2024

作者： Lee, Geon Lee, Jinwoo Lee, Jongsu Ryu, Yong-Sang Seo, Minah Seoul02792 Korea Republic of Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of KU-KIST Graduate School of Converging Science and Technology Korea University Seoul02841 Korea Republic of Department of Electrical Engineering and Computer Science Northwestern University EvanstonIL60208 United States School of Biomedical Engineering Korea University Seoul02841 Korea Republic of

This study presents a novel approach utilizing THz nanostructures to observe Pd catalytic reactions. By integrating Pd with THz metamaterials, we achieved real-time monitoring of Pd state during catalytic reaction, pr... 详细信息

关键词： Nanoclay

来源：评论

学校读者我要写书评

暂无评论

Salacca zalacca extract's antiaging effect on aging genes, protein levels, and apoptosis in UV-induced fibroblast cells

引用

Journal of Taibah University Medical Sciences 2025年第3期20卷 349-358页

作者： Widowati, Wahyu Dani, Dani Vera, Vera Wargasetia, Teresa L. Rahardja, Fanny Tih, Fen Onggowidjaja, Philips Tjokropranoto, Rita Zahiroh, Fadhilah H. Azis, Rizal Priyandoko, Didik Surakusumah, Wahyu Hadiprasetyo, Dhanar S. Faculty of Medicine Maranatha Christian University West Java Bandung Indonesia Bimolecular and Biomedical Research Center Aretha Medika Utama West Java Bandung Indonesia Biomedical Engineering Department of Electrical Engineering Faculty of Engineering Universitas Indonesia West Java Depok Indonesia Biology Study Program Faculty of Mathematics and Science Education Universitas Pendidikan Indonesia West Java Bandung Indonesia Faculty of Pharmacy Universitas Jenderal Achmad Yani West Java Cimahi Indonesia

Objectives: Ultraviolet (UV) exposure can hasten the aging process of the skin. The use of chemicals for anti-aging has long-term adverse effects. The natural ingredients of snake fruit (Salacca zalacca L.) are known to have bioactive properties such as polyphenols, flavonoids, chlorogenic acid, and caffeic acid which have antiaging potential. The study aims to ascertain the potential of S. zalacca Extract (SZE) as an antiaging agent by in vitro assay. Methods: The SZE compound content was analyzed by LC-MS/MS. SZE viability test on human skin fibroblast (BJ) cells was carried out using the WST assay. BJ cells were UV-induced as a cell model of premature aging. SZE 6.25, 12.5, and 25 μg/mL were administered to UV-induced BJ cells. The gene expression of COL1A1, MMP-1, FGF-2, and GPX-1 were analyzed by quantitative Real-Time PCR. Elastin (ELN), Hyaluronidase (HAse), Cyclooxigenase-2 (COX-2), 8-Hydroxydeoxyguanosine (8-OHdG), and Melatonin (MT) protein levels were analyzed by ELISA assay. The apoptosis of BJ cells was analyzed using flow cytometry. One-way ANOVA in SPSS Software was used for statistical analysis. Results: Treatment with SZE increased COL1A1, FGF-2, and GPX-1 gene expression and also decreased MMP-1 gene expression. SZE also increased ELN and MT levels in UV-induced BJ cells. After SZE treatment, the protein levels of HAse, COX-2, and 8-OHdG decreased compared to the positive control. SZE also succeeded in maintaining the lives of BJ cells and reducing apoptosis in BJ cells. Conclusions: SZE has the potential to be an antiaging agent by in vitro assay. © 2025 The Authors

关键词： Antiaging Antioxidant Chlorogenic acid Salacca zalacca Ultraviolet

来源：评论

学校读者我要写书评

暂无评论

Past,present and future of indium phosphide quantum dots

引用

Nano Research 2022年第5期15卷 4468-4489页

作者： Houman Bahmani Jalali Sadra Sadeghi Itir Bakis Dogru Yuksel Asim Onal Sedat Nizamoglu Graduate School of Biomedical Science and Engineering KoçUniversityIstanbul 34450Turkey Department of Electric and Electronics Engineering KoçUniversityIstanbul 34450Turkey Department of Material Science and Engineering KoçUniversityIstanbul 34450Turkey Present address:Photonic Nanomaterials Group Istituto Italiano di TecnologiaGenova 16124Italy Present address:Department of Electrical and Computer Engineering Queen's UniversityKingston K7L 3N6Canada Present address:Nanophotonics Group Debye Institute for Nanomaterials ScienceUtrecht UniversityUtrecht 3508 TAThe Netherlands

Indium phosphide(InP)colloidal quantum dots(QDs)have been drawn significant attention as a potentially less toxic alternative to cadmium-based QDs over the past two *** advances in their colloidal synthesis methods have allowed for the synthesis of a wide variety of compositions,heterojunctions,dopants,and ligands that enabled spectral tunability from blue to near-infrared,narrow emission linewidths,and perfect quantum yields approaching ***,it has higher covalency compared to cadmium chalcogenides leading to improved optical *** state-of-the-art InP QDs with appealing optical and electronic properties have excelled in many applications such as light-emitting diodes,luminescent solar concentrators(LSCs),and solar cells with high potential for *** review focuses on the history,recent development,and future aspect of synthesis and application of colloidal InP QDs.

关键词： indium phosphide InP quantum dot nanocrystal synthesis colloidal doping

来源：评论

学校读者我要写书评

暂无评论

Exciton recycling via InP quantum dot funnels for luminescent solar concentrators

引用

Nano Research 2021年第5期14卷 1488-1494页

作者： Houman Bahmani Jalali Sadra Sadeghi Isinsu Baylam Mertcan Han Cleva W.Ow-Yang Alphan Sennaroglu Sedat Nizamoglu Graduate School of Biomedical Sciences and Engineering KoçUniversityIstanbul34450Turkey Graduate School of Material Science and Engineering KoçUniversityIstanbul34450Turkey KoçUniversity Surface Science and Technology Center(KUYTAM) KoçUniversityIstanbul34450Turkey Laser Research Laboratory KoçUniversityIstanbul34450Turkey Department of Electrical and Electronics Engineering KoçUniversityIstanbul34450Turkey Department of Material Science and Nano Engineering Sabanci UniversityIstanbul34956Turkey

Luminescent solar concentrators (LSC) absorb large-area solar radiation and guide down-converted emission to solar cells for electricity production. Quantum dots (QDs) have been widely engineered at device and quantum dot levels for LSCs. Here, we demonstrate cascaded energy transfer and exciton recycling at nanoassembly level for LSCs. The graded structure composed of different sized toxic-heavy-metal-free InP/ZnS core/shell QDs incorporated on copper doped InP QDs, facilitating exciton routing toward narrow band gap QDs at a high nonradiative energy transfer efficiency of 66%. At the final stage of non-radiative energy transfer, the photogenerated holes make ultrafast electronic transitions to copper-induced mid-gap states for radiative recombination in the near-infrared. The exciton recycling facilitates a photoluminescence quantum yield increase of 34% and 61% in comparison with semi-graded and ungraded energy profiles, respectively. Thanks to the suppressed reabsorption and enhanced photoluminescence quantum yield, the graded LSC achieved an optical quantum efficiency of 22.2%. Hence, engineering at nanoassembly level combined with nonradiative energy transfer and exciton funneling offer promise for efficient solar energy harvesting.

关键词： energy transfer indium phosphide quantum dot light harvesting luminescent solar concentrator luminescent solar concentrators(LSC)

来源：评论

学校读者我要写书评

暂无评论

Transcriptomic analysis of Andrias davidianus meat and experimental validation for exploring its bioactive components as functional foods

引用

Food Science and Human Wellness 2024年第1期13卷 166-172页

作者： Changge Guan Zhenglin Tan Shucheng Li Yi Wang Naoyuki Yamamoto Chong Zhang Songjun Wang Junjie Chen Xinhui Xing Key Laboratory for Industrial Biocatalysis Ministry of Education of ChinaDepartment of Chemical EngineeringTsinghua UniversityBeijing 100084China School of Life Science and Technology Tokyo Institute of TechnologyYokohama 226-0026Japan Sensing System Research Center National Institute of Advanced Industrial Science and TechnologyTsukuba 305-8565Japan Center for Synthetic and Systems Biology Tsinghua UniversityBeijing 100084China Henan Giant Salamander Protection and Development Association Luoyang 471000China Intelligent Computing Research Center Harbin Institute of TechnologyShenzhen 518071China Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China Institute of Biomedical Health Technology and Engineering Shenzhen Bay LaboratoryShenzhen 518067China

Andrias davidianus(Chinese giant salamander,CGS)is the largest and oldest extant amphibian species in the world and is a source of prospective functional food in ***,the progress of functional peptides mining was slow due to lack of reference genome and protein sequence *** this study,we illustrated full-length transcriptome sequencing to interpret the proteome of CGS meat and obtain 10703 coding DNA *** functional annotation and amino acid composition analysis,we have discovered various genes related to signal transduction,and 16 genes related to *** have also found vast variety of functional peptides through protein coding sequence(CDS)analysis by comparing the data obtained with the functional peptide ***-Pro-Ile predicted by the CDS analysis was released from the CGS meat through enzymatic hydrolysis,suggesting that our approach is *** study suggested that transcriptomic analysis can be used as a reference to guide polypeptide mining in CGS meat,thereby providing a powerful mining strategy for the bioresources with unknown genomic and proteomic sequences.

关键词： Chinese giant salamander Transcriptomic analysis Bioactive components Functional peptides mining

来源：评论

学校读者我要写书评

暂无评论

Polarisation optics for biomedical and clinical applications:a review

引用

Light(Science & Applications) 2021年第11期10卷 2028-2047页

作者： Chao He Honghui He Jintao Chang Binguo Chen Hui Ma Martin J.Booth Department of Engineering Science University of OxfordParks RoadOxford OX13PJUK Guangdong Engineering Center of Polarisation Imaging and Sensing Technology Tsinghua Shenzhen International Graduate SchoolTsinghua University518055 ShenzhenChina Institute of Biopharmaceutical and Health Engineering Tsinghua Shenzhen International Graduate SchoolTsinghua University518055 ShenzhenChina Department of Physics Tsinghua University100084 BeijingChina Department of Biomedical Engineering Tsinghua University100084 BeijingChina

Many polarisation techniques have been harnessed for decades in biological and clinical research,each based upon measurement of the vectorial properties of light or the vectorial transformations imposed on light by *** advanced vector measurement/sensing techniques,physical interpretation methods,and approaches to analyse biomedically relevant information have been developed and *** this review,we focus mainly on summarising methodologies and applications related to tissue polarimetry,with an emphasis on the adoption of the Stokes-Mueller *** recent breakthroughs,development trends,and potential multimodal uses in conjunction with other techniques are also *** primary goal of the review is to give the reader a general overview in the use of vectorial information that can be obtained by polarisation optics for applications in biomedical and clinical research.

关键词： clinical optics breakthrough

来源：评论

学校读者我要写书评

暂无评论

The Recurrent U-Net for Needle Segmentation in Ultrasound Image-Guided Surgery*

The Recurrent U-Net for Needle Segmentation in Ultrasound Im...

引用

Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Yao Chen Hui Che Zihan Ji Jiaxin Qin Yibin Huang Jian Wu Institute of Biomedical Engineering Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen China Shenzhen Traditional Chinese Medicine Hospital Shenzhen China

ISBN: (数字)9798350371499

ISBN: (纸本)9798350371505

In minimally invasive surgery, poor needle visualization under ultrasound has been one of the challenges of the surgery. To improve the resulting puncture error, it is effective to use deep learning from the image level to assist the surgeon in locating the needle tip position and presenting the needle trajectory angle. In this paper, a network structure based on the U-shaped network and convolutional gated recurrent unit is proposed, which could capture the information about the movement of the needle and improve the accuracy of the needle segmentation. The input of the network are three temporally consecutive ultrasound images, and the output is the segmentation of the last frame. The network is trained and tested on our bovine liver dataset containing 192 videos captured from 20 different livers. Our proposed network achieved 85% precision, 86% recall, 85% F1-score, and 76% IoU, and could localize the needle with a mean tip error of 0.66mm and a mean trajectory angle error of 0.72°. This work demonstrates the effectiveness of convolutional neural networks in improving needle visibility for minimally invasive surgical procedures. The incorporation of needle motion information into the network framework significantly boosts the segmentation precision.

关键词： Image segmentation Visualization Ultrasonic imaging Minimally invasive surgery Motion segmentation Bovine Liver Needles Trajectory Videos

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：