Miracle-dz/UniFAR-FTUs huggingface dataset:
The Microstructure and Properties of Copper with Ceria Nanoparticles Addition

Copper-based composites strengthened by ceria nanoparticles were processed by conventional powder metallurgy: mixing (30 min and 46 rpm), compaction (cold, uniaxial, 1080 MPa for 10 s) and sintering (800°C for 6 h in vacuum atmosphere of 10−5 torr). It was studied the microstructure (optical microscopy, scanning electron microscopy), X-ray diffraction with Rietveld refinement and some properties (electrical conductivity, Vickers hardness and fracture analysis) of the compositions 92 wt% Cu - 8 wt% CeO2 and 80 wt% Cu - 20 wt% CeO2. The results showed uniform phase distribution, low porosity and ceria disperse inside copper grain. In despite of properties, the composites had electrical conductivity of 38% IACS and 15% IACS and hardness of 69 and 88 HV5, respectively. The results of 92 wt% Cu - 8 wt% CeO2 composites were promising, and they are in according with actual literature.
EFFECTS OF AQUEOUS EXTRACT OF VERNONIA KOTSCHYANA SCH. BIP. EX WALP ROOTS ON EXPERIMENTAL GASTRIC ULCER IN MICE

The present study investigated the antiulcer/gastro-protective effects of aqueous extract obtained from Vernonia kotschyana roots on two animal models of gastric ulcer induced by indomethacin and, respectively, absolute ethanol. The extract proved to have weak in vitro antioxidant activity on scavenging free radicals (ABTS radical cation, superoxide and nitric oxide) and weak ability of ferrous ions chelating. FT-IR analysis showed the presence of carbohydrates (polysaccharides) and saponins in the aqueous extract. The results of antiulcer activity study showed that Vernonia aqueous extract is efficient on indomethacin-induced ulcer model (ED50 = 557.12 ± 38.29 mg/kg b.w.) and has gastro-protective activity on absolute ethanol-induced ulcer model (ED50 = 439.85 ± 5.67 mg/kg b.w.). Further studies are needed to elucidate other mechanisms through which the aqueous extract exerts antiulcer/gastro-protective effects. Sub-fractionation of the extract may reveal the presence of novel compounds with antiulcer/gastro-protective activity.
Structure and Optical Properties of Al-Doped ZnO Nanodrums as Anti-Reflection Coating Material in Solar Cells

Al-doped ZnO (AZO) nanodrums were synthesized using hydrothermal method at 80 °C for 20 h using precursor Zn(CH 3 COO) 2 ·2H 2 O and Al(OH)(CH 3 COO) 2 as a dopant by varying the addition of Al concentrations in the range of 0, 1, 5, 10, 15, and 20 mM. The variation of Al can affect structure properties, optical properties and the crystal growths of ZnO. Addition of Al can inhibit the crystal growth with the decrease of the crystal size ranging from about 43.46 to 37.21 nm. Morphology of Al variation doped ZnO of Al was studied using a Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) and showed nanodrums morphology. Optical properties of thin film AZO was evaluated using UV-Visible spectrophotometer. The transmission spectra showed that AZO has ~85% transparency in the visible spectra with a sharp peak in the UV region. AZO with the addition of 20 mM Al has the largest transmittance and the lowest reflectance. The crystallite size of AZO can affect optical properties with the occurrence of blue shift. The thin film with transparent properties is a good candidate for application in the dye-sensitized solar cells, such as anti-reflecting coating. AZO was prepared as anti-reflection on the DSSCs system. The best efficiency of DSSCs performance was examined by varying the thickness of the layers of AZO and pointed an efficiency improvement up to 18.29 times.
Desempenho nas habilidades auditivas de atenção seletiva e memória auditiva em um grupo de idosos protetizados: influência de perda auditiva, idade e gênero

PURPOSE: to verify the performance in the auditory abilities of selective attention and hearing memory of elderly with prosthesis and relate it to the degree and the configuration of hearing loss, the gender and the age. METHOD: 29 elderly people from 60 to 84 years old were evaluated, 17 of them (58,62%) females and 12 (41,38%) males. The evaluations carried out included meatoscopy, audiometry evaluation and the use of the SSW test in Portuguese. RESULTS: the analysis of the data showed that, in this group of individuals, the age and the degree of auditory loss influenced significantly in the scores obtained in the evaluation of the auditory process, unlike the other variables. The elderly that showed light degree with horizontal configuration obtained scores significantly higher than the ones who had auditory loss in moderate degree with horizontal configuration or moderate degree with descending configuration. Elderly belonging to the age range 60 to 69 years old obtained performance significantly superior when compared with the ones in the age range of 80 to 89 years old. CONCLUSION: it was concluded that the degree of hearing loss and the age influenced the evaluation of the auditory processing. The gender and the configuration of hearing loss were not significant determining factors in the evaluation of the auditory processing.
Characteristics of High Voltage Gain of Non-Isolated Inductor-Less DC-DC Converter

In recent years, DC-DC converters are widely used in many applications such as electrical vehicle (EV), DC-DC transmission line, telecommunication data center [1][2]. The input voltage of the generation such as photovoltaic is typically low and unregulated. Hence, a suitable converter is required in order to increase the output voltage. The conventional DC-DC boost converter is practically not able to generate very high output voltage because it requires high turn-on duty cycle [3]. Very high duty cycle causes the turn-off switching time becomes narrow and it would cause the switching devices to be always in ON condition. Furthermore, it causes the increasing of conduction loss and the rating (current/voltage) for the components [4]. Besides, very high duty cycle, beyond 0.8 also increases switching loss [2], [4], [5]. Very high voltage gain is required for converting very low source voltage to very high output voltage, such as from 10 V to 100 V. In order to overcome this problem, multistage or multilevel structures of DC-DC converter are required in order to achieve the high voltage gain without concerning the duty cycle issue [6]–[10]. Thus, the selection of inductor-less multistage modular capacitor clamped DC-DC converter (IMMCCC) circuit structure is considered in this study, whereby with this structure high voltage gain can be achieved without concerning duty cycle issue. Abstract: The main purpose of this study is to analyze a multilevel DC-DC converter structure for achieving high voltage gain of DC-DC converter. The Inductor-less Multistage Modular Capacitor Clamped DC-DC Converter (IMMCCC) is one of the multilevel structure that can achieve the high voltage gain. In this circuit structure, the concept of charging and discharging capacitors is used in order to achieve high voltage gain regardless of the duty cycle influence. For the conventional DC-DC boost converter, the output voltage depends on the duty cycle, where high voltage gain is not practically achievable even though with a high duty cycle. Thus, the multistage structure which is IMMCCC is selected in order to achieve the high voltage gain of DC-DC converter. In order to analyze and confirm principle of the designed converter, simulation and experimental works are conducted. Three structures i.e., one, two and three stages of the IMMCCC are designed and constructed. Based on the experimental results, the obtained output voltages are 60 V (boost ratio = 2), 90 V (boost ratio = 3) and 120 V (boost ratio = 4) with the input voltage of 30 V. From the simulation and experimental results, the operation of the designed IMMCCC is confirmed.
Electrical and Structural Properties of All-Sputtered Al/SiO2/p-GaN MOS Schottky Diode

The all-sputtered Al/SiO2/p-GaN metal-oxide-semiconductor (MOS) Schottky diode was fabricated by the cost-effective radio-frequency sputtering technique with a cermet target at 400 °C. Using scanning electron microscope (SEM), the thicknesses of the electrodes, insulator SiO2 layer, and p-GaN were found to be ~250 nm, 70 nm, and 1 µm, respectively. By Hall measurement of a p-Mg-GaN film on an SiO2/Si (100) substrate at room temperature, the hole’s concentration (Np) and carrier mobility (μ) were found to be Np = 4.32 × 1016 cm−3 and μ = 7.52 cm2·V−1·s−1, respectively. The atomic force microscope (AFM) results showed that the surface topography of the p-GaN film had smoother, smaller grains with a root-mean-square (rms) roughness of 3.27 nm. By I–V measurements at room temperature (RT), the electrical properties of the diode had a leakage current of ~4.49 × 10−8 A at −1 V, a breakdown voltage of −6 V, a turn-on voltage of ~2.1 V, and a Schottky barrier height (SBH) of 0.67 eV. By C–V measurement at RT, with a frequency range of 100–1000 KHz, the concentration of the diode’s hole increased from 3.92 × 1016 cm−3 at 100 kHz to 5.36 × 1016 cm−3 at 1 MHz, while the Fermi level decreased slightly from 0.109 to 0.099 eV. The SBH of the diode at RT in the C–V test was higher than in the I–V test because of the induced charges by dielectric layer. In addition, the ideality factor (n) and series resistance (Rs) determined by Cheung’s and Norde’s methods, other parameters for MOS diodes were also calculated by C–V measurement at different frequencies.
Advanced Thermoelectric Materials for Energy Harvesting Applications

Electrical energy consumption is negatively affecting our environment and contributing to climate change. Therefore the research and industrial communities are working hard to minimize energy consumption using promising energy-efficient and renewable energy technologies. We know that it is possible to convert heat energy into electrical energy using thermoelectric devices; this heat energy can be from the sun or from an electro-mechanical device. However, thermoelectric devices traditionally suffer from lower efficiencies of energy conversion. This book, Advanced Thermoelectric Materials for Energy Harvesting Applications, is a researchintensive textbook consisting of eight chapters organized into three sections. Section 1 consists of Chapters 2, 3, and 4, which cover advanced thermoelectric materials and the topics of organic/inorganic thermoelectric materials, quantum theory of the Seebeck coefficient for the advancement of thermoelectric superconducting material, and the limits of Bismuth Telluride-based thermoelectric materials. Section 2, containing Chapters 5 and 6, evaluates behaviors and performance of thermoelectric devices. Section 3, containing Chapters 7 and 8, focuses on energy harvesting applications of thermoelectric devices. This book will be of interest to a wide range of individuals, such as scientists, engineers, researchers, and undergraduate and postgraduate students in the field of advanced thermoelectric materials.
Partners to Parents: development of an online intervention for enhancing partner support and preventing perinatal depression and anxiety

ABSTRACT Objective: Couples-based interventions to prevent perinatal depression and anxiety are needed to optimise parental well-being and infant mental health. Current interventions are limited by their focus on maternal mental health, postnatal outcomes, and a reliance on professionals for their delivery. This article describes the development of Partners to Parents (http://www.partnerstoparents.org), an online intervention for preventing perinatal depression and anxiety focused on enhancing partner support. Method: Individual usability testing sessions were conducted with 12 parents in the perinatal period (7 women and 5 men) to assess the quality of the website. A deductive coding scheme was applied using NVivo 10 to identify comments relating to system and content quality of the website, as well as positive and negative comments. Results: The results of the usability testing yielded more than 250 comments on system and content quality, potential barriers to accessing the website, and suggestions for improvement. This feedback was used to update the design of the intervention. Discussion: The usability testing sessions suggested that the majority of the mothers and fathers involved perceived the website to be a useful new resource. Consultation with potential users of the website enabled refinement of the content and design of the Partners to Parents website.
Texture and Stress Evolution in HfN Films Sputter-Deposited at Oblique Angles

In this study, polycrystalline hafnium nitride (HfN) thin films were grown by oblique angle deposition (OAD) technique to investigate the relationship between column tilt angle, texture development and residual stress evolution with varying inclination angle α of the substrate. The films (~1 μm thickness) were grown at various angles (α = 5°, 25°, 35°, 65°, 75°, and 85°) with respect to the substrate normal by reactive magnetron sputtering at 0.3 Pa and 300 °C. The film morphology, crystal structure and residual stress state were characterized by scanning electron microscopy and X-ray diffraction (XRD), including pole figure and sin2ψ measurements. All HfN films had a cubic, NaCl-type crystal structure with an [111] out-of-plane orientation and exhibited a biaxial texture for α ≥ 35°. XRD pole figures reveal that the crystal habit of the grains consists of {100} facets constituting triangular-base pyramids, with a side and a corner facing the projection of the incoming particle flux (indicative of a double in-plane alignment). A columnar microstructure was formed for α ≥ 35°, with typical column widths of 100 nm. It is observed that the column tilt angle β increases monotonously for α ≥ 35°, reaching β = 34° at α = 85°. This variation at microscopic scale is correlated with the tilt angle of the (111) crystallographic planes, changing from −24.8 to 11.3° with respect to the substrate surface. The residual stress changes from strongly compressive (~−5 GPa at α = 5°) to negligible or slightly tensile for α ≥ 35°. The observed trends are compared to previous works of the literature and discussed based on existing crystal growth and stress models, as well as in light of energy and angular distribution of the incident particle flux calculated by Monte Carlo. Importantly, a decrease of the average kinetic energy of Hf particles from 22.4 to 17.7 eV is found with increasing α due to an increase number of collisions.
A Study of Prevalence of Iodine Deficiency Disorders among 6-12 Years Children of Rajnandgaon District of Chhattisgarh. -

Objective: To estimate prevalence of Iodine Deficiency Disorders among 6-12 years of children. Study Design: A Cross-sectional study was conducted in selected schools of Rajnandgaon district. Children in the age group of 6-12 years were selected for study using latest NIDDCP guidelines of Government of India. Clinical examination of 90 children (45 boys and 45 girls) in each cluster for goiter was done. Every 10th child examined for Goiter was selected for urine sample and Median urinary Iodine excretion (MUIE) was estimated by wet digestion method. Salt samples were collected from 4 randomly selected households and 1 sample from retail shop from each identified clusters, salt samples were tested on the spot using rapid salt testing kit. Iodine concentration was recorded as 0, 15. Results: Prevalence of Goiter was found to be 17.56%. In male Goiter prevalence was 17.59% and in females 17.51%. High prevalence (19.97%) was found in the age group 8-9 years. Block wise prevalence was maximum in Manpur block (28.88%) and lowest in Chowki block (12.77%). Median urinary Iodine excretion (MUIE) was found to be 44.80 mcg/l. 29.07% salt samples brought by school children were found inadequately iodized (Iodine content
S14.3 Evaluating the internet as an STD risk environment for teens: findings from the communication, health, and teens (CH@T) study

Background The CH@T study aims to identify/characterise a group of teens reporting meeting sex partners online and a group reporting meeting sex partners in-person (not online) and examine the differences between the 2 groups in sexual health risks. Methods Youth aged 13–19 years (N=273) visiting a publicly-funded clinic completed a 20-min Audio-Computer Assisted Self-Interview. Included were global sexual behaviour questions (eg, oral/vaginal/anal sex experience, number of sex partners) and specific partnership history questions, including meeting partners online/offline. Participants were also tested for chlamydia/gonorrhea. Audio-Computer Assisted Self-Interview responses were anonymously linked to teens' biological STD results. A χ2 test was performed to determine the association between meeting a sex partner online and current STD status. Results Participants identified as female (89.4%) and heterosexual (80.7%). Nearly 9 in 10 (88.6%) reported oral, 97.8% vaginal, and 28.6% anal sex experience. Of those with biological STD data (n=267), 14.2% had a current STD infection. Of all teens, 15.4% (n=42) reported having sex with a partner originally met online (of these, > half [57.1%] met >1 partner). Compared with teens reporting only partners met in-person, teens reporting an online partner had significantly greater numbers of oral, vaginal, and anal sex partners. However, analyses indicated no association between having a current STD and reporting an online partner, χ2 (1, N=267)=0.95, p=0.34. Conclusions Theory-driven STD prevention and sexual health promotion interventions should be tailored to meet specific needs of young people seeking partners both online and offline. Sex-seeking, dating, and social networking websites may represent important intervention contexts.
Homeless Patient With Tuberculosis in the Emergency Department

Homeless individuals with unique situations and frequently with tuberculosis present to the emergency department. The practitioner faces a myriad of challenges that require a variety of assessment skills. Special attention needs to be given to assess mental health, substance use and abuse, residential history, victimization, and perceived health status. The behavioral model for vulnerable populations provides a framework for access to health services and a method for determining health outcomes of the homeless. It also outlines a format for factors used in assessing this population. Continued use of this model offers a template for healthcare for the homeless and use of the emergency department.
Unit-1 An Introduction to Ethics

The objective of this unit is to introduce you to ‘ethics’ or moral philosophy. Ethics is a wide topic. Through the analysis of its various aspects we can learn that: • the nature and the different aspects of ethics • how ethics developed as a systematic philosophical discipline in the western philosophy • the methods, different approaches and the division of ethics • how ethics is related to other sciences • the relationship between ethics and religion • the importance of studying ethics in the context of today and the need for being moral.
Treatment Effect of Wenxin Grain Combined with Amiodarone for Chronic Atrial Fibrillation

Objective To explore the clinical effect of Wenxin Grain combined with Amiodarone in the treatment of chronic atrial fibrillation.Methods 168 patients with atrial fibrillation were divided into three groups.Group A was treated with Wenxin Grain and Amiodarone;group B with Amiodarone;group C with Wenxin Grain.Then the improvement of clinical symptoms and Holter and the rat of adverse effects were observed.Results After treatment,Holter compared with the state before treatment,the total effective rate of group A was 91.22 percent,the total effective rate of group B was 69.09 percent,the total effective rate of group C was 69.64 percent.Comparing group A with group B and C,there was significant statistical difference(P0.05). Comparing group B with group C,there was no statistical difference(P0.05). After treatment,the clinical symptom improvement of group A was significantly better than that of group B and C(P(0.05). )The rate of the adverse effects of group A and C was lower than that of group B.Conclusion Wenxin Grain combined with Amiodarone is more effective and safe than the two alone in treating patients with chronic atrial fibrillation.
Low Intake of Aspartame Induced Weight Gain and Damage of Brain & Liver Cells in Weanling Syrian Hamsters

This study aims to investigate the health effects of aspartame on weanling male hamsters. 20 Golden Syrian hamsters drank only water (control) or water with 6, 11, and 18 mg aspartame/kg of body weight per day for 42 days. Food intake, weight gain, glucose blood level, and lipid profile were determined at the end of the experiment. The animals were sacrificed and histopathological examination of organs (liver, brain and heart) was done. Results revealed that animals in Aspartame groups (Asp.groups) consumed significantly larger amount of food than the control (13.4±5.9, 8.6±2.5 and 8.8±3.0 vs 4.2±2.5 g/day, in succession). Hamsters in the control group showed higher total cholesterol and HDL levels than hamsters in aspartame 6, 11, 18 groups (160±19 vs 101±13, 130±22, 141±15 mg/dl & 144±9 vs 120±12, 118±13, 99±17 respectively (P<0·05)). The control group showed a glucose concentration below those of aspartame groups, indicating no effect of aspartame on glucose blood level. While, there were no significant differences in the triglycerides and LDL levels between control group and Asp.groups. Histopathological changes were observed, especially in brain and liver cells. Aspartame increases appetite and weight gain of young hamsters. Therefore, authorities (the Joint FAO/WHO Expert Committee on Food Additives (JECFA), the U.S. Food and Drug Administration (FDA), the European Food Safety Authority (EFSA) and the Agence Francaise de Securite Sanitaire des Aliments (French Food Safety Agency – AFSSA)) should reconsider the acceptable daily intake (ADI) of aspartame especially for children, they are more vulnerable than adults.
Social competence and person-object differentiation: An analysis of the still-face effect.

The communicative abilities of infants, revealed in the still-face (SF) procedure, were examined in 2 studies comparing behavior toward people and «interactive» objects. In Experiment 1, thirty-two 3- and 6-month-olds were presented with an object and a person (mother or female stranger). The SF effect was produced only by mothers and strangers. Positive affect clearly established person-object differentiation; infants smiled at people but rarely at the object. In Experiment 2, twelve 3-month-olds were presented with 4 stimuli: a female stranger and 3 objects with features varying in similarity to an abstract, smiling face. Again, infants reseerved their smiles for the person