Experimental Assessment of Linear Sampling and Factorization Methods for Microwave Imaging of Concealed Targets

Shape reconstruction methods are particularly well suited for imaging of concealed targets. Yet, these methods are rarely employed in real nondestructive testing applications, since they generally require the electrical parameters of outer object as a priori knowledge. In this regard, we propose an approach to relieve two well known shape reconstruction algorithms, which are the linear sampling and the factorization methods, from the requirement of the a priori knowledge on electrical parameters of the surrounding medium. The idea behind this paper is that if a measurement of the reference medium (a medium which can approximate the material, except the inclusion) can be supplied to these methods, reconstructions with very high qualities can be obtained even when there is no information about the electrical parameters of the surrounding medium. Taking the advantage of this idea, we consider that it is possible to use shape reconstruction methods in buried object detection. To this end, we perform several experiments inside an anechoic chamber to verify the approach against real measurements. Accuracy and stability of the obtained results show that both the linear sampling and the factorization methods can be quite useful for various buried obstacle imaging problems

Mother-child and teacher-child relationships and their associations with school adjustment in pre-school

This research aims to investigate the contributions of Turkish pre-school children’s levels of positive/ conflicting relationships with their mothers and close/conflicting relationships with their teachers in predicting their adjustment to school. The sample of the study consists of 190 six-year-old children attending public pre-schools in Adana (a city in southern Turkey), as well as their mothers and teachers. For the data analysis, hierarchical regression analysis has been conducted. The results of the study show the positive relationship established with the mother and teacher to be related to an increase in children’s school-adjustment behaviors. A positive relationship has been noted for positive mother-child relationships with children’s cooperative participation, self-directedness, and total school adjustment. The results indicate a positive link for closeness in the teacher-child relationship with school liking, cooperative participation, self-directedness, and total school adjustment. Additionally, a positive relationship has been observed for the conflictive teacher-child relationship with school avoidance. An inverse relationship has also been observed for the conflictive teacher-child relationship with cooperative participation, self-directedness, and school adjustment. As conflicts with a teacher increase, the child’s school adjustment decreases. © 2018 EDAM

A new hybrid ligand and its metal complexes from a natural plant (Styrax officinalis) bearing egonol, thiosemicarbazone and oxime units, and their anti-cancer activities

A novel hybrid ligand, a vic-dioxime ligand (ETO), containing thiosemicarbazone and egonol moieties from a natural plant (Styrax officinalis) and its trinuclear [Ni(II), Cu(II), Co(II), and Fe(II)] and mononuclear [Pd(II) and Zn(II)] complexes have been synthesized and characterized. The ligand, complexes, and natural components were characterized by conventional spectroscopic techniques (IR, NMR, and MS) and evaluated against two human cancer cell lines (MCF-7 and PC-3) to determine their antiproliferative and apoptotic properties. Apoptotic or necrotic effects were detected in both cancer cell lines using the Hoechst/propidium iodide double-staining method. Paclitaxel was used as a positive control (1 mu M). The results displayed that the compounds obtained in this study were effective in the concentration range of 5-40 mu M in prostate and breast cancer cell lines. It can be said that the compounds (egonol, its derivatives, hybrid ligand, and its metal complexes) are mostly more effective in PC-3 migration lines. Consequently, the cytotoxic efficiencies of [Cu-3(ETO)(2)center dot 4Cl], 5.27 mu M for MCF-7 and 13.44 mu M for PC-3 and [Zn (ETO)center dot 2Cl] 11.73 mu M for MCF-7 and 9.32 mu M for PC-3 were observed to be close to paclitaxel (a drug used as a cancer chemotherapeutic agent). [Cu-3(ETO)(2)center dot 4Cl] were more effective on the MCF-7 cell line. Besides this result, [Zn (ETO)center dot 2Cl] was more effective on the PC-3 cell lines and was more effective by triggering apoptosis in the cells