• Title/Summary/Keyword: sorting

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An Android Application to Guide Waste Sorting using a Deep Learning Image Classifier (딥러닝 사진 분류기를 활용한 분리배출 가이드 안드로이드 응용)

  • Kim, So-Yeong;Park, So-Hui;Kim, Min-Ji;Lee, Je-min;Kim, Hyung-Shin
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2021.07a
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    • pp.99-101
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    • 2021

  • 쓰레기 대란, 환경파괴의 상황 속 실제 재활용 쓰레기 가운데 절반 정도만이 재활용되고 있다. 재활용률을 높이기 위해, 올바른 분리배출 방법을 쉽고 편하게 찾을 수 있는 방식이 필요하다. 본 논문에서는 올바른 분리수거를 통해 재활용률을 증진하기 위한 분리수거 분류 서비스를 제안한다. 본 논문은 ResNet-34 모델을 통해 안드로이드 카메라로 촬영한 이미지의 분리배출 클래스를 예측하고 그에 따른 분리배출 가이드를 제공하는 시스템을 설계하였다. 향후 연구에서는 모델의 정확도 향상을 위해 온디바이스와 서버 모델을 분리하고 모델의 개인 맞춤화를 진행할 예정이다.

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Micro-imaging techniques for evaluation of plastic microfluidic chip

  • Kim, Jung-Kyung;Hyunwoo Bang;Lee, Yongku;Chanil Chung;Yoo, Jung-Yul;Yang, Sang-Sik;Kim, Jin-Seung;Park, Sekwang;Chang, Jun-Keun
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.1 no.4
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    • pp.239-247
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    • 2001

  • The Fluorescence-Activated Cell Sorter (FACS) is a well-established instrument used for identifying, enumerating, classifying and sorting cells by their physical and optical characteristics. For a miniaturized FACS device, a disposable plastic microchip has been developed which has a hydrodynamic focusing chamber using soft lithography. As the characteristics of the spatially confined sample stream have an effect on sample throughput, detection efficiency, and the accuracy of cell sorting, systematic fluid dynamic studies are required. Flow visualization is conducted with a laser scanning confocal microscopy (LSCM), and three-dimensional flow structure of the focused sample stream is reconstructed from 2D slices acquired at $1\mutextrm{m}$ intervals in depth. It was observed that the flow structure in the focusing chamber is skewed by unsymmetrical velocity profile arising from trapezoidal cross section of the microchannel. For a quantitative analysis of a microscopic flow structure, Confocal Micro-PIV system has been developed to evaluate the accelerated flow field in the focusing chamber. This study proposes a method which defines the depth of the measurement volume using a detection pinhole. The trajectories of red blood cells (RBCs) and their interactions with surrounding flow field in the squeezed sample stream are evaluated to find optimal shape of the focusing chamber and fluid manipulation scheme for stable cell transporting, efficient detection, and sorting

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