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Although the hearing skills of children with hearing loss are improved with the help of hearing aids, cochlear implants, and speech therapy, they have difficulties understanding and producing language because of their delayed hearing onset. Considering that these children go to school with their hearing peers, it is needed that their oral language performance be compared with the hearing students. Hence, the present study analyzed and compared the oral language skills of children with hearing loss having hearing aids and cochlea implants, with their hearing counterparts. For this purpose, 39 children aged 6-8 years were examined by the Told-p:3 test. The participants included 16 hearing children, 13 children with cochlear implants, and 10 children with hearing aids. The data were analyzed using Kruskal-Wallis and Mann-Whitney U tests. The results showed no significant difference in syntactic and semantic skills of children having hearing aids and cochlear implants. However, the findings indicated a significant difference between hearing children and children with hearing loss ones having hearing aids and cochlear implants in their semantic and syntactic skills. Therefore, it is needed that children with hearing loss go through verbal-auditory rehabilitation training until they reach the hearing level of hearing children. Neglecting this issue can have detrimental effects on their educational achievements and future job performance.

1.  Introduction

Today, in the Iranian context, children with any kind of physical-motor and hearing disabilities go to public schools to study with other students if they have normal IQs. Although the language skills of hearing-loss children are improved with the help of hearing aids, cochlear implants, and speech therapy, because the onset of hearing in these children is delayed and given that the education of hearing-loss children is done in public schools, it is necessary that the quality of oral language and, consequently, the quality of the written language of deaf children in comparison with their hearing peers be carefully examined. Therefore, in the present study, the quality of oral language in hearing-loss children with their hearing counterparts has been analyzed and compared.

2. Method
In this study, oral language of hearing and hearing loss children was compared from two aspects of listening and speaking. For this purpose, 39 children aged 6-8 years, including 16 hearing children, 13 children with cochlear implants, and 10 children with hearing aids were examined by using the told-p3 test. Deaf children had pre-lingual deafness and had received hearing aids or cochlear aids before the age of two, and have gradually been able to speak with auditory-verbal rehabilitation training. The Told-p3 test was used for data collection. The collected data were analyzed using descriptive statistics for all variables. For inferential statistics, the Kruskal-Wallis test was used to examine the difference between the means in all three groups of children, and then the Mann-Whitney U test was used to compare the groups.

3. Results
The gathered data were analyzed using SPSS. Descriptive and inferential statistics were used for data analysis. The results showed no significant difference in syntactic and semantic skills of children having hearing aids and cochlear implants (P.>0.05). However, the findings indicated a significant difference between hearing children and children with hearing loss ones having hearing aids and cochlear implants in their semantic and syntactic skills (P.<0.05). These children had a significantly worse performance than that of hearing children in receiving and understanding the meanings of words and sentences, providing verbal definitions of words and recognizing them, and understanding and applying the forms.

4. Conclusion
The findings of the study showed no significant difference in the quality of oral language between children with cochlear implants and hearing aids. However, there was a significant difference between hearing children and the two groups of hearing-loss children in the quality of oral language in terms of listening and speaking. Accordingly, because deaf children have poorer performance than that of hearing children, not paying enough attention to this issue can have detrimental effects on their educational achievements and future job performance.  Therefore, the policy of teaching hearing-loss children in public schools along with hearing peers needs more reflection by educational policymakers. It is suggested that hearing loss children be helped by different interventions and rehabilitation programs before they start their education with their hearing peers. 
 

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Dyadic Data Analysis (DDA) has been suggested, in the existing literature, to be used to explore interpersonal variables which have long been conventionally investigated in isolation. DDA is effective in analyzing procedures that go on among dyads in studies of family relations, partnership, teacher-student affairs, and many other interpersonal relationships. Illustrative examples come from psychological, behavioral, and sociological studies that help develop the researcher's ability to investigate relationship processes, model and test for the effects of actors, partners, and relationships, and control for the statistical inter-dependence which can be conceived between partners. The present paper first reviews the distinctive features of DDA and the potential advantages it can have for language studies. Also, it shows how longitudinal DDA is strongly needed in the investigation of L2 affective variables in the Second Language Acquisition (SLA) domain to longitudinally explore the dynamic and developmental nature of language learners’ affective factors. Finally, it goes on with making suggestions for a future line of inquiry using this innovative analytic procedure and ends with several conclusive remarks about this analytical framework which is compatible with the complexity of dynamic systems theory (CDST).
 

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The effects of banana continuous cropping on soil quality and chemical properties and crop yield were investigated under continuous cropping for 1, 3, 5, 7, 10, and 15 years in Hainan province, China. The results indicated that the contents of total N, total K, available K, NH₄-N, exchangeable Ca, and available Cu tended to increase, while total organic C (TOC), available S, and available Zn tended to decrease with the increase of continuous cropping years at the four sampling stages. The contents of exchangeable Mg and available Fe and Mn were higher in the 3, 5, 7, and 10 years than in the 1 and 15 years at the four sampling stages. The values of pH, the contents of total P and available P decreased from 1 to 5 years and increased from 7 to 15 years at most of the sampling stages. Overall, average banana yield increased from 1 to 3 years and decreased afterwards. In conclusion, banana continuous cropping deteriorated soil quality as evidenced by increase of soil acidity, decrease of total organic C, accumulation of N, P, K, Ca and Cu, deficiency of Mg, S, Fe, Mn, and Zn and accompanying decline in banana yield. In order to improve the soil environment and sustain higher productivity under continuous-banana cropping system, application of balanced rate of fertilizers is of considerable importance.

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Ginger (Zingiber officinale Roscoe) contains the biological properties of the major standard non–volatile pungent compounds of ginger, namely, [6]–, [8]–, and [10]–gingerols, as well as [6]– , [8]–, and [10]–shogaols. So far, the comparative antioxidant potencies among shogaols and gingerols have not been studied in detail and reported. Accordingly, this study aimed to examine and compare the antioxidant abilities of the six main compounds. Results showed that[6]–, [8]–, and [10]–gingerols, as well as [6]–, [8]–, and [10]–shogaols exhibited substantial in vitro antioxidant activities. The DPPH^•, ABTS^•+,and FRAP assays results showed that the antioxidant abilities of [6]–shogaol were greatest among the six gingerols and shogaols studied (P< 0.05), and those of [6]–, [8]–, and [10]–shogaols were greater than those of [6]–, [8]–, and [10]–gingerols, respectively, which can be attributed to the presence of α, β–unsaturated ketones moieties. Moreover, the observation that the antioxidant abilities of [6]–gingerol were greater than those of [8]– and [10]–gingerols (P< 0.05) indicated that the short carbon chains of [6]–gingerol and [6]–shogaol played a significant role in making them more potent antioxidants than the other four longer carbon chain compounds. This finding can be attributed to gingerols undergoing dehydration transformations into shogaols during oven drying. Our results provided some new information on the antioxidant abilities of gingerols and shogaols.

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Nitrous oxide (N₂O) has significant impact on global warming and leads to the depletion of ozone in the stratosphere. Agricultural soil is regarded as a major source of N₂O emissions. In recent years, greenhouse grown vegetables have rapidly developed in China. Although excessive fertilizer application in greenhouse vegetable production can result in increased N₂O emissions, research data on such emissions from greenhouse vegetables, such as cucumber, remains limited. In this study, four nitrogen (N) fertilizer treatments including 1,200 (N₁₂₀₀, traditional N amount), 900 (N₉₀₀), and 600 kg N ha^-1 (N₆₀₀) and the control (N₀) were carried out on cucumber in a greenhouse in the North China Plain. Results showed that N₂O emissions mainly occurred in the first five days after topdressing, and accounted for 75.8%-95.2% of total N₂O emissions produced in the whole interval (10 days). Significant exponential correlations were observed between N₂O flux and nitrification or denitrification rates (P< 0.01). The results also indicated that nitrification dominated and played a more important role in N₂O emissions than denitrification under the irrigation conditions of the study (water-filled pore spacewas 40.0 to 66.6%). Cumulative N₂O emissions were 0.48-5.01 kg N ha^-1 in the cucumber growing season, accounting for 0.28-0.38% of nitrogen input. Compared to N₁₂₀₀, treatment N₆₀₀ significantly reduced the rate of N₂O emissions by 53.4%, and also maintained cucumber yield. Based on this study, 50% of the traditional N fertilizer rate (N₆₀₀) was considered sustainable for greenhouse cucumber production in the North China Plain.

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In this paper, a hypersonic inlet for operating at Mach 5.0 is designed and analyzed numerically. The main axis of this study is a series of three-dimensional simulations with the accuracy of 10E-06 which are applied to determine the effects of the highly developed boundary layer on the performance of inlet for three different study cases. The basic inlet concept is designed by integration of double ramp compression surface and inlet duct which can reduce the free-stream Mach number to the range of 2.0. The most important factor that it affects the performance of the hypersonic inlet system, is the developed entropy layer on the fuselage of the flight vehicle. Ingestion of this layer results in thermal gradients and pressure recovery losses. The bow shocks at the nose and the leading edges are the main sources of this low kinetic energy layer. Using the k-ω turbulence model in the numerical simulations have resulted in a reliable estimation of the boundary layer. In the current context, shock structures, shock-boundary layer interactions, flow quality at the end of the diffuser and also the effects of using sidewalls on the performance of the hypersonic inlet are the main goals of the simulations and the related results are summarized