A Critical Review on Language Learning Strategies and Implications for College English Teaching

This paper reviews the current developments of language learning strategy researches in the world, both approval and critical voices on the issue of strategy instruction. Then it summarizes the current developments of learning strategy instruction in China. It indicates college English teachers should model learning strategy and make the instruction explicit. Students are advised to be active in seeking for strategies suitable for themselves through their own exploration and reflection.

Advances in low-field nuclear magnetic resonance(NMR) technologies applied for characterization of pore space inside rocks:a critical review

NMR serves as an important technique for probing rock pore space,such as pore structure characterization,fluid identification,and petrophysical property testing,due to the reusability of cores,convenience in sample processing,and time efficiency in laboratory tests.In practice,NMR signal collection is normally achieved through polarized nuclei relaxation which releases crucial relaxation messages for result interpretation.The impetus of this work is to help engineers and researchers with petroleum background obtain new insights into NMR principals and extend existing methodologies for characterization of unconventional formations.This article first gives a brief description of the development history of relaxation theories and models for porous media.Then,the widely used NMR techniques for characterizing petrophysical properties and pore structures are presented.Meanwhile,limitations and deficiencies of them are summarized.Finally,future work on improving these insufficiencies and approaches of enhancement applicability for NMR technologies are discussed.

Role of theories in school-based diabetes care interventions:A critical review

BACKGROUND Diabetes is one of the most common chronic diseases of childhood.School plays an essential role in the management of student diabetes,which reduces the risk of short-and long-term diabetes complications and ensures that students are wellpositioned for optimal academic performance and growth.AIM The aim of this review was to systematically identify and synthesize the literature concerning theory-based diabetes care interventions in K-12 schools in the United States.It critically assessed the specific role of theories and associated essential constructs in intervention design,implementation,outcome measurement,and evaluation.METHODS Relevant literature was identified by keyword searches of the Cochrane Library,PubMed,and Web of Science.RESULTS Four interventions met the eligibility criteria and were included in the review.Of those,two evaluated online diabetes education programs for school personnel and the other two assessed in-person interventions.Three studies adopted a onegroup pre-post study design,and the remaining one adopted a one-shot casestudy design.Three of the interventions adopted social cognitive theory,and the remaining one was guided by the diffusion of innovations theory.Three studies identified core constructs of a theory as predictors of behavioral change.Two used theory to select or develop intervention techniques.Two studies used theory to customize participant intervention techniques.Two studies discussed their findings in the context of theory.No study used theory to select potential intervention participants.CONCLUSION In conclusion,despite the value of theory in intervention design and evaluation,theory-based diabetes interventions at school remain scarce.Future research may seek ways to better integrate theory and empirical research.

A Critical Review of “Genre Analysis:Structural and Linguistic Evolution of the English-medium Medical Research Article(1985–2004)”

This paper critically analyzes the article"Genre analysis: Structural and linguistic evolution of the English-medium medical research article(1985–2004)". It presents critique from three aspects: the data, the analysis method, and the conclusion part.

A critical review of key materials and issues in solid oxide cells

Solid oxide cells(SOCs)are all solid ceramic devices with the dual functionality of solid oxide fuel cells(SOFCs)to convert the chemical energy of fuels like H2,natural gas and other hydrocarbons to electricity and of solid oxide electrolysis cells(SOECs)to store renewable electric energy of sun and wind in hydrogen fuel.Among the electrochemical energy conversion and storage devices,SOCs are the most clean and efficient technology with unique dual functionality.Due to the high operation temperature(typically 600–800°C),SOCs exhibit many advantages over other energy conversion devices,such as low material cost,high efficiency and fuel flexibility.There has been rapid development of SOC technologies over the last decade with significant advantages and progress in key materials and a fundamental understanding of key issues such as an electrode,electrolyte,performance degradation,poisoning,and stack design.The reversible polarization also has a critical effect on the surface segregation and stability of the electrode and electrode/electrolyte interface.This critical review starts with a brief introduction,working principles and thermodynamics of SOC technology to readers with interests in this rapidly developing and emerging field.Then the key materials currently used in SOCs are summarized,followed by the discussion of the most advanced electrode modification methods and critical issues of SOCs,including the surface chemistry,segregation,electrode/electrolyte interface and varying material degradation mechanisms under reversible operations.The challenges and prospects of SOC technology for future developments are discussed.

Chinese Herbal Medicine for Lung Cancer——A Critical Literature Review(Continued)

CLINICAL STUDIES Clinical studies on Chinese herbal medicine(CHM)in lung cancer(LC)have largely been on anumber of basic formulae selected by syndrome(Zheng)differentiation,or specific formula basedon clinical experience.There have also been anumber of studies comparing combination ofCHMs with either chemotherapy or radiotherapywith chemotherapy or radiotherapy alone,to as-sess any additional benefits or synergistic outcomesof the combination.

Accident and hazard prediction models for highway–rail grade crossings:a state-of-the-practice review for the USA

Highway–rail grade crossings(HRGCs)are one of the most dangerous segments of the transportation network.Every year numerous accidents are recorded at HRGCs between highway users and trains,between highway users and traffic control devices,and solely between highway users.These accidents cause fatalities,severe injuries,property damage,and release of hazardous materials.Researchers and state Departments of Transportation(DOTs)have addressed safety concerns at HRGCs in the USA by investigating the factors that may cause accidents at HRGCs and developed certain accident and hazard prediction models to forecast the occurrence of accidents and crossing vulnerability.The accident and hazard prediction models are used to identify the most hazardous HRGCs that require safety improvements.This study provides an extensive review of the state-of-the-practice to identify the existing accident and hazard prediction formulae that have been used over the years by different state DOTs.Furthermore,this study analyzes the common factors that have been considered in the existing accident and hazard prediction formulae.The reported performance and implementation challenges of the identified accident and hazard prediction formulae are discussed in this study as well.Based on the review results,the US DOT Accident Prediction Formula was found to be the most commonly used formula due to its accuracy in predicting the number of accidents at HRGCs.However,certain states still prefer customized models due to some practical considerations.Data availability and data accuracy were identified as some of the key model implementation challenges in many states across the country.