Common Errors in Speaking of English-Majored Sophomores at Tay do University, in Vietnam

It is undeniable that speaking skill is very important in learning English It is a tool to help students to find good jobs in the future especially if they expect to work for a foreign company However in the process of learning and practicing speaking English students get a lot of difficulties Therefore the research Common Errors in Speaking of English-Majored Sophomores at Tay Do University Vietnam was conducted to investigate common mistakes of English-majored sophomores from English classes course 14 at Tay Do University The questionnaire and interview were two main instruments Research results showed that Englishmajored sophomores made some common errors about pronunciation vocabulary and grammar It is hoped that sophomores can recognize and correct their errors to make the necessary changes to improve speaking skill

Human papillomavirus-associated oropharyngeal cancer: a new clinical entity

The incidence of oropharyngeal cancers is rising worldwide in both nonsmokers and nondrinkers. Epidemiology studies suggest a strong association between human papillomavirus (HPV) 16 infection, changing sexual behavior and cancer development. Despite initial presentation with locally advanced disease and poorly differentiated histology, HPV-associated oropharyngeal carcinoma is associated with a good prognosis because its response to chemotherapy and radiation. Clinicians should be aware of the risk of oropharyngeal cancer in young people to avoid unnecessary delay in diagnosis and treatment. A history of oral sex should be elicited in young patients with enlarged neck nodes and/or tonsillar masse

Noncentrosymmetric Packings Influenced by Electronic Properties of Products of Click Reactions

Though 1,4-disubstituted 1,2,3-triazole rings have been utilized as electronic bridges in the solution phase, the use of a triazole ring to serve as an electronic bridge of small molecules in the crystalline state has been underdeveloped. Here two compounds with a central 1,4-disubstituted 1,2,3-triazole ring are synthesized to investigate the electronic bridging between terminal stilbazole and pyridine groups in the crystalline phase. The electronic properties of the molecules are characterized through solution phase UV–vis spectroscopy, single crystal X-ray diffractions, and density-of-state and gas-phase DFT calculations. We show that the electronic bridging behavior of a 1,4-disubstituted 1,2,3-triazole ring derived from a click reaction is maintained in the solid state by rare head-to-head (hh) packing in noncentrosymmetric crystal environments

Politically connected firms and corporate social responsibility implementation expenditure in sub-Saharan Africa: Evidence from Ghana

YesWhile previous research has emphasized the role of stakeholder pressures, firm‐specific factors, as well as CEO characteristics as important drivers of corporate social responsibility (CSR) implementation, our understanding of how political connections impact small and medium‐sized enterprises' (SMEs') CSR implementation expenditure is quite limited. In this study, we contribute to filling this gap by investigating the effects of political connections and CSR expenditure and explain the conditions that impact this relationship. Using data from 473 SMEs in Ghana, we find that political connections negatively influence CSR implementation expenditure. However, the negative effect is weakened when a firms' reputation and competitive CSR implementation pressures are high. Implications for theory and practice are discussed.University of Economics Ho Chi Minh City, Vietna

Human resource slack, sustainable innovation and environmental performance of small and medium-sized enterprises in sub-Saharan Africa

YesDespite the burgeoning interests in the environmental strategy, there is a limited understanding of how human resource slack drives sustainable innovation and environmental performance. This paper contributes to filling this gap by examining the effect of human resource slack on sustainable innovation and its impact on environmental performance. Besides, this paper investigates the contingent effects of intangible resource advantage on this relationship. The hypotheses are tested using data from 301 small and medium‐sized enterprises in Ghana. The results suggest that human resource slack positively relates to sustainable innovation and this relationship is moderated by intangible resource advantage. Also, we find that sustainable innovation mediates the relationship between human resource slack and environmental performance. The insights from our paper provide a nuanced understanding of the relationships among human resource lack, sustainable innovation, and environmental performance. Implications for theory and practices are discussed.University of Economics Ho Chi Minh City, Vietna

Three essays in financial economics: regulation, supervision and lenders' behaviour

This thesis contributes to the literature on the unintended consequences of financial reg-ulation. Throughout the thesis, I ask three independent yet related research questionsaiming to empirically understand how lenders restructure their balance sheets throughlending and securitization under exogenous regulatory and supervisory shocks. My first paper examines whether financial institutions use securitization to shift theircredit default risk to Government Sponsored Enterprises (Fannie Mae and Freddie Mac)more frequently when they bear higher expected cost of default created by borrowerfriendly foreclosure laws in the United States (US). Using a geographical regression discon-tinuity design, I document that lenders are more likely to securitize GSE-eligible mortgageloans when subject to borrower-friendly foreclosure law. The paper points out that bor-rower friendly foreclosure laws lead to unintended consequences of raising US taxpayers’exposure to the housing market of $140bn per annum. In the second paper, I exploit the interstate branching deregulation in the US as a naturalexperiment and answer a novel research question: “Does competition policy increase secu-ritization in the lead up to the financial crisis?”. I document that more intense competitionfollowing the relaxation of branching restrictions increases the cost of deposits, which inturn, motivates banks to switch from the “originate-to-hold” to “originate-to-distribute”model. Evidence using mortgage level analysis also suggests that the probability that abank sells a mortgage loan in the secondary market is significantly higher in the face ofderegulation. The findings highlight a hitherto neglected factor behind the rapid expansionin securitization before the financial crisis. My third paper looks at how supervisory actions under the German stress testing frame-work affect bank lending. Exploiting supervisory requirements in maximum unexpectedeconomic losses due to interest rate risk a bank can incur as sharp thresholds for moni-toring and capital surcharges, I find that greater supervisory monitoring does not affectlending behaviour but mandatory capital surcharges significantly reduce bank lending.The contraction in lending is most pronounced for corporate loans, mortgage loans, andfor loans with longer maturities

Understanding the effect of saturated gases on catalytic performance of graphitic‐carbon nitride (g‐C₃N₄) for H₂O₂ generation and dye degradation in the presence of ultrasound

This paper examines the effect of saturated gases on H2O2 generation and dye degradation using graphitic‐carbon nitride (g‐C3N4) as a piezoelectric catalyst. A detailed catalytic evaluation was carried out using a double‐bath sono‐reactor, where the performance of g‐C3N4 for H2O2 production and degradation of rhodamine B and indigo carmine dyes was evaluated for a range of catalyst dosage levels and saturated gases. Specific gases were selected to understand their role in the sonochemical production of reactive oxygen species (ROS) and reactive nitrogen species (RNS) and to elucidate the potential catalytic mechanism. The use of an Ar‐O2 gas mixture led to the highest yield for H2O2 production and dye degradation due to the positive effect of argon and oxygen in the generation of H2O2 and reactive oxygen species, respectively. The presence of nitrogen in both air and in an Ar‐air mixture increased H2O2 generation since reactive nitrogen species improved the conversion of •OH into H2O2. In contrast, air and Ar‐air negatively influenced the generation of ROS, which resulted in a low rate of dye degradation. This work provides new insights of the mechanisms of sonochemical and piezocatalytic processes in the use of graphitic‐carbon nitride in catalytic applications.This article is protected by copyright. All rights reserved

Long-distance dispersal of pigeons and doves generated new ecological opportunities for host-switching and adaptive radiation by their parasites.

Adaptive radiation is an important mechanism of organismal diversification and can be triggered by new ecological opportunities. Although poorly studied in this regard, parasites are an ideal group in which to study adaptive radiations because of their close associations with host species. Both experimental and comparative studies suggest that the ectoparasitic wing lice of pigeons and doves have adaptively radiated, leading to differences in body size and overall coloration. Here, we show that long-distance dispersal by dove hosts was central to parasite diversification because it provided new ecological opportunities for parasites to speciate after host-switching. We further show that among extant parasite lineages host-switching decreased over time, with cospeciation becoming the more dominant mode of parasite speciation. Taken together, our results suggest that host dispersal, followed by host-switching, provided novel ecological opportunities that facilitated adaptive radiation by parasites

Market risk analysis of energy in Vietnam

The purpose of this paper is to evaluate and estimate market risk for the ten major industries in Vietnam. The focus of the empirical analysis is on the energy sector, which has been designated as one of the four key industries, together with services, food, and telecommunications, targeted for economic development by the Vietnam Government through to 2020. The oil and gas industry is a separate energy-related major industry, and it is evaluated separately from energy. The data set is from 2009 to 2017, which is decomposed into two distinct sub-periods after the Global Financial Crisis (GFC), namely the immediate post-GFC (2009–2011) period and the normal (2012–2017) period, in order to identify the behavior of market risk for Vietnam’s major industries. For the stock market in Vietnam, the website used in this paper provided complete and detailed data for each stock, as classified by industry. Two widely used approaches to measure and analyze risk are used in the empirical analysis, namely Value-at-Risk (VaR) and Conditional Value-at-Risk (CVaR). The empirical findings indicate that Energy and Pharmaceuticals are the least risky industries, whereas oil and gas and securities have the greatest risk. In general, there is strong empirical evidence that the four key industries display relatively low risk. For public policy, the Vietnam Government’s proactive emphasis on the targeted industries, including energy, to achieve sustainable economic growth and national economic development, seems to be working effectively. This paper presents striking empirical evidence that Vietnam’s industries have substantially improved their economic performance over the full sample, moving from relatively higher levels of market risk in the immediate post-GFC period to a lower risk environment in a normal period several years after the end of the calamitous GFC