scholarly journals Surface morphology and X-ray photoelectron spectroscopy of BiFeO3 thin films deposited on top of Ta2O5/Si layers

2021 ◽  
Vol 295 ◽  
pp. 04009
Author(s):  
Shikhgasan Ramazanov ◽  
Ştefan Ţălu ◽  
Rashid Dallaev ◽  
Guseyn Ramazanov ◽  
Pavel Škarvada ◽  
...  

In this study a comparison of the topography of BiFeO3 (BFO) thin films deposited on tantalum pentoxide substrates of different thicknesses is provided. The Ta2O5 substrates had a roughness increasing with the film thickness. The relationship between substrates of different topography but the same composition with the quality of the growing bismuth ferrite film is estimated. For the first time the topography estimation of BFO on Ta2O5 is presented. The difference in temperature expansion coefficients leads to intensive evaporation of bismuth ferrite from the surface during annealing. XPS analysis is provided for asdeposited and annealed BFO layers.

Author(s):  
Tianlei Ma ◽  
Marek Nikiel ◽  
Andrew G. Thomas ◽  
Mohamed Missous ◽  
David J. Lewis

AbstractIn this report, we prepared transparent and conducting undoped and molybdenum-doped tin oxide (Mo–SnO2) thin films by aerosol-assisted chemical vapour deposition (AACVD). The relationship between the precursor concentration in the feed and in the resulting films was studied by energy-dispersive X-ray spectroscopy, suggesting that the efficiency of doping is quantitative and that this method could potentially impart exquisite control over dopant levels. All SnO2 films were in tetragonal structure as confirmed by powder X-ray diffraction measurements. X-ray photoelectron spectroscopy characterisation indicated for the first time that Mo ions were in mixed valence states of Mo(VI) and Mo(V) on the surface. Incorporation of Mo6+ resulted in the lowest resistivity of $$7.3 \times 10^{{ - 3}} \Omega \,{\text{cm}}$$ 7.3 × 10 - 3 Ω cm , compared to pure SnO2 films with resistivities of $$4.3\left( 0 \right) \times 10^{{ - 2}} \Omega \,{\text{cm}}$$ 4.3 0 × 10 - 2 Ω cm . Meanwhile, a high transmittance of 83% in the visible light range was also acquired. This work presents a comprehensive investigation into impact of Mo doping on SnO2 films synthesised by AACVD for the first time and establishes the potential for scalable deposition of SnO2:Mo thin films in TCO manufacturing. Graphical abstract


Surfaces ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 106-114
Author(s):  
Yannick Hermans ◽  
Faraz Mehmood ◽  
Kerstin Lakus-Wollny ◽  
Jan P. Hofmann ◽  
Thomas Mayer ◽  
...  

Thin films of ZnWO4, a promising photocatalytic and scintillator material, were deposited for the first time using a reactive dual magnetron sputtering procedure. A ZnO target was operated using an RF signal, and a W target was operated using a DC signal. The power on the ZnO target was changed so that it would match the sputtering rate of the W target operated at 25 W. The effects of the process parameters were characterized using optical spectroscopy, X-ray diffraction, and scanning electron microscopy, including energy dispersive X-ray spectroscopy as well as X-ray photoelectron spectroscopy. It was found that stoichiometric microcrystalline ZnWO4 thin films could be obtained, by operating the ZnO target during the sputtering procedure at a power of 55 W and by post-annealing the resulting thin films for at least 10 h at 600 °C. As FTO coated glass substrates were used, annealing led as well to the incorporation of Na, resulting in n+ doped ZnWO4 thin films.


Author(s):  
Rory Hachamovitch ◽  
Brian Griffin ◽  
Alan Klein ◽  
Benjamin Nutter ◽  
Irene Katzan ◽  
...  

Background. Patients (pts) diagnosed with congestive heart failure (HF) have been reported to have more frequent depression and worsened health related quality of life (HRQOL). Although depression is more common in women than men in this condition, the impact of HF on depression and HRQOL in men versus women is unclear. We sought to examine the relationship between pt sex, HF diagnosis, and pt-perceived depression and HRQOL. Methods. Depression (PHQ-9) and HRQOL (EQ5D) data were collected using tablet computers from pts presenting for routine outpatient cardiovascular assessment at our institution between November, 2010 and December, 2011. Demographic, clinical, and historical data was collected as per routine. We examined the association of pt sex and clinical diagnosis of HF with instrument results after adjusting for potential confounding information using mutliple linear regression. Results. Of 3046 pts (age 61±15), 39% were female and 8.7% were diagnosed with HF. Overall, PHQ-9 was greater, and minor or major depression (PHQ-9≥10) was more frequent, in women than men (4.6±4.6 vs. 3.3±4.4; 14.0% vs. 8.9%, both p<0.05) and in HF pts than pts without HF (5.9±5.6 vs. 3.6±4.3, 22.0% versus 9.6%; both p<0.05). Similarly, HRQOL was worse in women than men (EQ-5D 0.80±0.18 vs. 0.87±0.16; p<0.01) and in HF pts than no HF (EQ-5D 0.76±0.18 vs. 0.85±0.17; p<0.01). However, the difference in PHQ-9 between pts with versus without HF was greater in men (6.23±6.06 vs. 3.02±4.06, p<0.01) than women (5.43±4.85 vs. 4.55±4.58, p=0.09). After adjusting for cardiovascular diagnoses, comorbidities, clinical and demographic data, multivariable modeling of PHQ-9 revealed a significant interaction between pt sex and HF diagnosis (p=0.001; see Figure) such that women had greater PHQ-9 scores compared to men without HF, but in the setting of HF, mens' PHQ-9 scores were greater. Modeling of EQ-5D also revealed that after risk-adjustment an interaction between HF diagnosis and sex was present with a similar pattern of findings. Conclusion. Although depression is more frequent and severe in women compared to men, and in pts with versus without HF, HF appears to impact depression severity more in men compared to women.


2021 ◽  
Vol 275 ◽  
pp. 03005
Author(s):  
Miao Yu

As the information reflection of social economy, the quality of accounting information is closely related to economic development and market operation system. And accounting conservatism is one of the important standards to measure of quality of accounting information. As the maker and executor of the financial strategy of the listed company, the CFO’s different personal characteristics will affect its choice of different accounting policies, thus affecting the accounting conservatism of the enterprise. Therefore, this paper selects CFOs of A-share listed companies in Shanghai and Shenzhen from 2016 to 2018 as research objects, respectively discusses the influence of CFO’s natural attributes and social attributes on accounting conservatism, and analyzes the moderating effect of property rights and CFO’s power on the relationship between them. The results show that the CFO’s age, tenure, education, professional skills, salary and number of part-time jobs are negatively correlated with accounting conservatism. The female CFO, shareholding and concurrent director are significantly positively correlated with accounting conservatism. The difference of property right nature and CFO power moderates the relationship between CFO characteristics and accounting conservatism to some extent. On this basis, this paper puts forward corresponding suggestions on how to improve accounting conservatism and promote economic development.


2016 ◽  
Vol XXIV (2) ◽  
pp. 161-168
Author(s):  
Marta Sankiewicz

Hatshepsut and Tuthmosis III were represented as seemingly equal kings on the side walls of the Second Room of the Main Sanctuary of Amun in the Temple of Hatshepsut in Deir el-Bahari. Iconographic analysis reveals the relationship between the two rulers, demonstrating the different and discreet ways in which Hatshepsut emphasized her dominant position and Tuthmosis’s secondary one during their co-rule. The quality of the representations is just as crucial as their number for understanding their relationship. Hatshepsut used among others the symbolism of the cardinal points, orientation of figures and the hierarchy of attributes to emphasize the difference in their positions. The four scenes in question are the most representative examples of these fixed rules in the Deir el-Bahari temple.


PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0246423
Author(s):  
Eleanor Buckley ◽  
Elizabeth Pellicano ◽  
Anna Remington

This study sought for the first time to identify the extent to which autistic people are pursuing careers in the performing arts, and to determine the nature of the relationship between individuals’ autistic traits and their reported wellbeing. To address these aims, we recruited a self-selecting, community-based sample of individuals working in the performing arts and invited them to complete an online survey. A total of 1,427 respondents took part. We collected responses on participants’ backgrounds, including diagnostic history as well as measures assessing their level of autistic traits, perceived occupational self-efficacy, quality of life, and mental health. They were also asked open-ended questions about support needed, received, or desired in their workplace. Eleven of the 1,427 professionals (1%) reported a clinical diagnosis of autism. Correlational analyses demonstrated that higher levels of autistic traits were significantly associated with lower levels of quality of life, lower levels of occupational self-efficacy and greater severity of mental health conditions. Almost half the sample of professionals (N = 621; 44%) reported a desire for more employment-based support, and autistic traits were significantly higher in those participants who wanted greater support. Within the community of those working in the performing arts, there are a minority of individuals who are autistic or who have high levels of autistic traits. We have demonstrated for the first time that these individuals may be especially vulnerable to lower wellbeing.


F1000Research ◽  
2013 ◽  
Vol 2 ◽  
pp. 49
Author(s):  
Carina C Silva ◽  
Agripino Oliveira

Background: Little is known about the relationship between the opinions of inpatients and the degree to which hospitals are improving in performance over time. The aim of this study was to determine the personal assessment level of inpatients or their representatives regarding aspects of health care in an internal medicine ward.Methods: We carried out a questionnaire in September 2011 with 284 discharged patients and patient representatives, focusing on their opinions about the department, health professionals and amenities, with response options ranging from 1 (very bad) to 5 (very good). The relationships between domains from the questionnaire and socio-demographic factors were examined using a t-test and one-way ANOVA.Results: The response rate was 78%. The patients showed a slightly higher mean score (m) for factors in the medical care domain than did the patient representatives (m = 4.51 vs. m = 4.27; p = 0.014). The mean score of all the items in all domains was 4.24; this allowed us to determine the difference from the overall mean (DIFM) for medical care (DIFM = 0.18; p = 0.000), foods (DIFM = –0.31; p = 0.000), diagnostic tests (DIFM = –0.15; p = 0.036) and transport (DIFM = –0.41; p = 0.000). Respondents with a medium or higher educational level gave lower scores to the domains food (m = 3.74; p = 0.004), diagnostic tests (m = 3.72; p = 0.04) and transport (m = 3.62; p = 0.025) than those with lower educational levels. The domains facilities (m = 2.4; p = 0.04) and diagnostic tests (m = 3.63; p = 0.009) were given lower scores by those aged <50 years compared with older respondents.Conclusions: Our findings suggest that the evaluation of the responders will allow the hospital management to make improvements in the quality of care.


Author(s):  
Lale Kabadayı

In the history of cinema, bad girl/boy characters are less common than other villain characters. However, these characters have a lot of influence on the audience. The Bad Seed movies, which are important book adaptations, are remarkable for the evil done by a charming, pretty little girl. The audience watched the story of this eight-year-old-girl for the first time with the adaptation made in 1956. The book was adapted as a television movie in the US both in 1985 and 2018. However, it was made in Turkey, too. This adaptation was shot in 1963 by director Nevzat Pesen. This black-and-white film is considered one of the best thriller-horror films of Turkish Cinema. In this study, the relationship of the little girl with evil will be examined in terms of differences in US and Turkish adaptations. Thus, the difference between the two cultures regarding the relationship between child and villainy will be evaluated from the point of cinema.


Author(s):  
David Goldstein

This introductory chapter provides an overview of Spanish Hebrew poetry. The revival of Hebrew poetry was a direct consequence of two factors: the residence of the Jews in Muslim lands, and the Jews’ reappraisal of the Hebrew Bible. The Jews of Spain followed their Arabic masters in much of their poetic subject-matter, but they often transmuted it into specifically Jewish material. One encounters often their awareness of the passing of time, of the futility of life, and of the precious quality of the immortal soul. And, above all, one experiences with them their search for the knowledge of God, their sense of dependence on him as the Creator of the world, their consciousness of the relationship between God and the Jewish people, their desire to serve him with all their being, their remorse at their own iniquity, and their torment and their bewilderment at the sufferings of their people. The Spanish period not only saw the efflorescence for the first time since the ‘song of Songs’ of secular Hebrew poetry. It also provided for the first time the framework for the professional Jewish poet.


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