Reactivity of Pt(0) bromosilylene complexes towards ethylene

The base-free carbazolyl bromosilylene RSiBr (R = 1,8-bis(3,5-di-tert-butyl-phenyl)-3,6-di-tert-butyl-carbazolyl) reacts with (η$^2$-C$_2$H$_4$)Pt(PPh$_3$)$_2$ and Pt(PCy$_3$)$_2$ to form platinasilacyclobutane R(Br)Si(C$_2$H$_4$)Pt(PPh$_3$)$_2$ (1) and silylene platinum complex R(Br)SiPt(PCy$_3$)$_2$ (2), respectively. When silylene complex 2 is treated with C$_2$H$_4$, the six-membered metallasilacycle R(Br)Si(C$_2$H$_4$)$_2$Pt(PCy$_3$)$_2$ (3) is obtained. All compounds are characterised by XRD and multinuclear NMR spectroscopy

Functionalized Carbazolyl Hydro‐ and Allyl‐Silanes

The synthesis and properties of silanes bearing a bulky carbazolyl substituent are described. Metathesis routes with different reagents under different conditions are required to obtain the compounds of the general formula RSi(X)$_{2}$H and RSi(X)$_{2}$All (X=Cl, N$_{3}$, NCO, NCS, NH$_{2}$, All=CH$_{2}$CHCH$_{2}$). The silanes were studied by XRD, NMR and IR spectroscopy and all findings were corroborated by DFT methods

Designing Vibrotactile Widgets with Printed Actuators and Sensors

Physical controls are fabricated through complicated assembly of parts requiring expensive machinery and are prone to mechanical wear. One solution is to embed controls directly in interactive surfaces, but the proprioceptive part of gestural interaction that makes physical controls discoverable and usable solely by hand gestures is lost and has to be compensated, by vibrotactile feedback for instance. Vibrotactile actuators face the same aforementioned issues as for physical controls. We propose printed vibrotactile actuators and sensors. They are printed on plastic sheets, with piezoelectric ink for actuation, and with silver ink for conductive elements, such as wires and capacitive sensors. These printed actuators and sensors make it possible to design vibrotactile widgets on curved surfaces, without complicated mechanical assembly

Analisis Faktor-Faktor Yang Mempengaruhi Pendapatan Pedagang Sayuran Di Pasar Pinasungkulan Karombasan Kota Manado

The purpose of this study is to analyze the factors that influence the income of vegetable traders in the Pinasungkulan Karombasan market. The type of data in this study is primary data obtained directly from interviews and through questionnaires distributed to respondents, namely vegetable traders at the Pinasungkulan Karombasan market, and also through secondary data from previous research journals. The number of samples in this study amounted to 37 respondents with a census technique according to direct observation during the pre-survey. The results of this study indicate the factors that influence the income of vegetable traders in the Pinasungkulan Karombasan market, namely capital, level of education, length of business and hours of work. Factors that significantly influence are capital and working hours. The level of education and length of business have no significant effect on the income of vegetable traders at the pinasungkulan karombasan market, Manado City.  

CORRELATION BETWEEN COMPUTER VISION SYNDROME AND UPPER LIMB DISORDERS AT WIDYA MANDALA CATHOLIC UNIVERSITY SURABAYA

Background: The world of technology that continues to develop, especially in computer, makes workers spend more time operating electronic devices. This can contribute to eye strain which is one of the most common symptoms of Computer Vision Syndrome (CVS). CVS may associated with musculoskeletal disorders, especially at upper extremities due to non-ergonomic body position, which can be referred to as Upper Limb Disorders (ULD). Therefore, CVS can affect the severity of ULD.Purpose: To explain correlation between CVS with ULD to students at Widya Mandala Catholic University Surabaya.Methods: Analytics observational was the type of this research and the research design was cross sectional study.Result: The groups of respondents who experienced CVS with the severity of ULD on a scale 0 (A): no pain; scale 1 (B): moderately painful; scale 2 (C): painful; scale 3 (D): very painful were found to be 34.3%, 25%, 2.3% and 0%. And the groups of respondents who did not experience CVS with the severity of ULD on a scale 0 (A), scale 1 (B), scale 2 (C), and scale 3 (D) were found to be 35.5%, 2.9%, 0%, and 0%. Results from Spearman test found that the p=0.000 so there’s a significant correlation between the two variables with a weak correlation coefficient (r=0,39).Conclussion: There was correlation between CVS and ULD with a weak correlation coefficient value in students at Widya Mandala Catholic University Surabay

A study of listening-reading scores of average and deficient readers.

The purpose of this study was to investigate the relationship of the listening-reading comprehension scores of average readers to the listening-reading comprehension scores of deficient/remedial readers. The raw scores of two hundred thirty-eight students derived from the Durrell Listening-Reading Series generated both the listening and reading scores.A linear regression was computed using listening scores as the independent predictor variables. The results attest that listening scores are relatively good predictors of reading ability; accounting for approximately 56.8 percent of variance in the listening scores.Descriptive statistics were computed for the main effect of the independent variables of sex and reading ability upon the dependent variables of reading scores and listening scores.A two two-way analysis of variance (ANOVA) tested the independent variables with the dependent variables. The results disclosed no interaction effect existed between sex and reading ability and reading and listening scores

SmallSat Space Solar Power: A Pathway to a Sustainable Future

On the 29th of July, 2019, humanity had already used more resources than the Earth regenerated in the entirety of the year. This is while 13% of people do not have access to electricity, and 40% do not have access to clean energy for cooking. Simply put, the Earth cannot sustain humanity’s energy needs

Discrepancies between two long-term dietary datasets in the United Kingdom

Background: Studying dietary trends can help monitor progress towards healthier and more sustainable diets but longitudinal data are often confounded by lack of standardized methods. Two main data sources are used for longitudinal analysis of diets: food balance sheets on food supply (FBS) and household budget surveys on food purchased (HBS). Methods: We used UK longitudinal dietary data on food supply, provided by the Food and Agriculture Organisation (FAO) (FAO-FBS, 1961-2018), and food purchases, provided by the Department for Environment, Food and Rural Affairs (Defra) (Defra-HBS, 1942-2018). We assessed how trends in dietary change per capita compared between FAO-FBS and Defra-HBS for calories, meat and fish, nuts and pulses, and dairy, and how disparities have changed over time. Results: Estimates made by FAO-FBS were significantly higher (p<0.001) than Defra-HBS for calorie intake and all food types, except nuts and pulses which were significantly lower (p<0.001). These differences are partly due to inclusion of retail waste in FAO-FBS data and under-reporting in Defra- HBS data. The disparities between the two datasets increased over time for calories, meat and dairy; did not change for fish; and decreased for nuts and pulses. Between 1961 and 2018, both FAO-FBS and Defra-FBS showed an increase in meat intake (+23.4% and +1.4%, respectively) and a decrease in fish (-7.1% and -3.2%, respectively). Temporal trends did not agree between the two datasets for dairy, calories, and nuts and pulses. Conclusions: Our finding raises questions over the robustness of both data sources for monitoring UK dietary change, especially when used for evidence-based decision making around health, climate change and sustainability

The effect of caffeine on cognitive performance is influenced by CYP1A2 but not ADORA2A genotype, yet neither genotype affects exercise performance in healthy adults

Purpose: To determine the influence of two commonly occurring genetic polymorphisms on exercise, cognitive performance, and caffeine metabolism, after caffeine ingestion. Methods: Eighteen adults received caffeine or placebo (3 mg kg−1) in a randomised crossover study, with measures of endurance exercise (15-min cycling time trial; 70-min post-supplementation) and cognitive performance (psychomotor vigilance test; PVT; pre, 50 and 95-min post-supplementation). Serum caffeine and paraxanthine were measured (pre, 30 and 120-min post-supplementation), and polymorphisms in ADORA2A (rs5751876) and CYP1A2 (rs762551) genes analysed.Results: Caffeine enhanced exercise performance (P  0.05). Caffeine enhanced PVT performance (P  0.05). Serum caffeine and paraxanthine responses were not different between genotypes (P > 0.05).Conclusion: Caffeine enhanced CYP1A2 ‘fast’ metabolisers’ cognitive performance more than ‘slow’ metabolisers. No other between-genotype differences emerged for the effect of caffeine on exercise or cognitive performance, or metabolism