2 research outputs found
Implementation of a Blind navigation method in outdoors/indoors areas
According to WHO statistics, the number of visually impaired people is
increasing annually. One of the most critical necessities for visually impaired
people is the ability to navigate safely. This paper proposes a navigation
system based on the visual slam and Yolo algorithm using monocular cameras. The
proposed system consists of three steps: obstacle distance estimation, path
deviation detection, and next-step prediction. Using the ORB-SLAM algorithm,
the proposed method creates a map from a predefined route and guides the users
to stay on the route while notifying them if they deviate from it.
Additionally, the system utilizes the YOLO algorithm to detect obstacles along
the route and alert the user. The experimental results, obtained by using a
laptop camera, show that the proposed system can run in 30 frame per second
while guiding the user within predefined routes of 11 meters in indoors and
outdoors. The accuracy of the positioning system is 8cm, and the system
notifies the users if they deviate from the predefined route by more than 60
cm.Comment: 14 pages, 6 figures and 6 table
Diagnosis of genetic defects through parallel assessment of PLCĪ¶ and CAPZA3 in infertile men with history of failed oocyte activation
Objective(s): Phospholipase C Ī¶ (PLCĪ¶) is considered as a nominee for sperm associated oocyte activating factors and is located back-to-back with CAPZA3, an actin-capping protein controlling actin polymerization during spermiogenesis. They contain a common bidirectional promoter. The objective of this study was to identify individuals with parallel low expression of PLCĪ¶ and CAPZA3 mRNA, in hope of detecting genetic defects in this bidirectional promoter.
Materials and Methods: Semen samples were collected from 24 fertile and 59 infertile individuals with total failed, low and high fertilization rate post intra-cytoplasmic sperm injection (ICSI), as well as globozoospermic individuals.Expression of PLCĪ¶ and CAPZA3 were assessed by Real time PCR. In addition, PLCĪ¶ was assessed by Western blot.
Results: Significant correlations between PLCĪ¶ with CAPZA3 and also between these two genes with fertilization were observed. Individuals with low fertilization presented significantly lower expression of these two genes. Low expression of PLCĪ¶ was also verified by Western analysis. Sequence analysis of bidirectional promoter of these two genes in an individual with parallel low expression of both PLCĪ¶ and CAPZA3, revealed a mutation within the CAPZA3 predicted promoter, known as human regulatory factor X4 which is a testis-specific dimeric DNA-binding protein. In the opposite stand, in the same location, the mutation appears to be outside but in the vicinity of PLCĪ¶, in a binding region predicate by Genomatix.
Conclusion: Parallel assessment of CAPZA3 with PLCĪ¶ at mRNA level in individuals with inability to induce oocyte activation may help researcher to identify genetic defects associated with failed fertilization