In this paper, the author will mainly focus on analysis about the differences between characteristics of older learners and young learners in learning second/foreign language.
With the successful hosting of the Beijing Olympic Games in 2008 and the World Exposition Shanghai China 2010,English,next to our mother tongue,has become the most important language in China.Therefore,learning Englis...With the successful hosting of the Beijing Olympic Games in 2008 and the World Exposition Shanghai China 2010,English,next to our mother tongue,has become the most important language in China.Therefore,learning English well is very important for most Chinese people.However,learning a foreign language well is not easy.We have to master several learning strategies and methods to learn it successfully.This paper will help all the foreign language learners to find the effective way in learning the second foreign languge.The paper mainly talks about two aspects:improving the abilities in listening,speaking and reading in order to communicate well;developing the ability of writing in English and perfecting the function of social communication.It gives out the concrete methods in listening,speaking,reading,writing,and translating.The authors hope that the paper would be helpful in assisting the foreign language learners to learn and master the second foreign language.展开更多
Hepatic abscess caused by foreign body penetration of the alimentary tract is rare. We report a case of gastric antrum penetration due to a toothpick complicated by liver abscess formation. A 41-year-old man was admit...Hepatic abscess caused by foreign body penetration of the alimentary tract is rare. We report a case of gastric antrum penetration due to a toothpick complicated by liver abscess formation. A 41-year-old man was admitted to our hospital with the chief complaint of upper abdominal pain for 2 mo. Esophagogastroduodenoscopy performed at a local clinic revealed a toothpick penetrating the gastric antrum. Computed tomography (CT) of the abdomen at our hospital revealed a gastric foreign body embedded in the posterior wall of gastric antrum with regional phlegmon over the lesser sac and adhesion to the pancreatic body without notable vascular injury, and a hepatic abscess seven cm in diameter over the left liver lobe. Endoscopic removal of the foreign body was successfully performed without complication. The liver abscess was treated with parenteral antibiotics without drainage. The patient’s recovery was uneventful. Abdominal ultrasonography demonstrated complete resolution of the hepatic abscess six months after discharge. Relevant literature from the PubMed database was reviewed and the clinical presentations, diagnostic modalities, treatment strategies and outcomes of 88 reported cases were analyzed. The results showed that only 6 patients received conservative treatment with parenteral antibiotics, while the majority underwent either image-guided abscess drainage or laparotomy. Patients receiving abscess drainage via laparotomy had a significantly shorter length of hospitalization compared with those undergoing image-guided drainage. There was no significant difference in age between those who survived and those who died, however, the latter presented to hospitals in a more critical condition than the former. The overall mortality rate was 7.95%.展开更多
With the process of economic and cultural globalization,the number of second foreign language learners has soared in recent years.Second foreign language learning has been an obvious trend in our times.This essay is d...With the process of economic and cultural globalization,the number of second foreign language learners has soared in recent years.Second foreign language learning has been an obvious trend in our times.This essay is devoted to exploring the causes of the phenomenon,the status of our second foreign language learning,the gains,the obstacles and their possible reasons during the learning process of the second-foreign-language learning.This essay falls into a questionnaire and four chapters in the body part.The questionnaire aims to help us find out the current status and the influence of second foreign language learning,the learners' attitude to learning and the material,the practical methods of learning the second foreign language.展开更多
Besides the sessions of teaching and learning in language learning activities, language attrition, as the concomitant product of language acquisition, exerts significant impact on language teaching, especially on fore...Besides the sessions of teaching and learning in language learning activities, language attrition, as the concomitant product of language acquisition, exerts significant impact on language teaching, especially on foreign language teaching. By exploring this phenomenon, some effective ways against language attrition can be found in order to maximize foreign language teaching. This paper is about to illustrate the relevant theories from scholars at home and abroad, and providing some ways to help foreign language learners maintain the language proficiency.展开更多
Case Presentation: A nine-year-old boy presented to the general ophthalmologist with a several weeks history of redness, photophobia and intermittent foreign body sensation in the right eye. A pigmented lesion with an...Case Presentation: A nine-year-old boy presented to the general ophthalmologist with a several weeks history of redness, photophobia and intermittent foreign body sensation in the right eye. A pigmented lesion with anterior chamber inflammation was noted on examination. B-scan ultrasound was performed and revealed no foreign body. The patient was diagnosed with anterior uveitis, which did not completely respond to treatment. The differential diagnosis was expanded to include peripheral ulcerative keratitis, phlyctenulosis, pigmented neoplasm, and corneal foreign body. Upon referral to a cornea specialist, an exam under anesthesia revealed a large foreign body consistent with a rock fragment in the peripheral cornea, which was subsequently removed without complication. Conclusion: This case highlights an atypical presentation of foreign body as well as a differential diagnosis of pigmented peripheral corneal lesions. Foreign bodies represent the most common cause of urgent ophthalmic evaluation. When evaluating lesions of the cornea, it is imperative to keep an extensive differential diagnosis, giving the potential for severe and rapid development of visually threatening complications.展开更多
This article intends to demonstrate the principles for dictionary compilation.To summarize,general rules are to be followed.At the same time,this article probes into the differences of Chinese to Chinese dictionary,Ch...This article intends to demonstrate the principles for dictionary compilation.To summarize,general rules are to be followed.At the same time,this article probes into the differences of Chinese to Chinese dictionary,Chinese to foreign language dictionary,dictionaries for the preparation of certain exams,learner’s dictionaries for reviewing errors,dictionaries with multimedia and dictionaries built via the Internet..In all,one of the key factors for dictionary compilation is the professionalism of editors and writers.The training of the people involved is vital,which would contribute to setting up a better order of the market.Acknowledgements should also be given to achievements in dictionary compilation.Revisions and polishing are required to improve the dictionaries on the market that have already won the acclaim so as to put their influence to the best display.展开更多
Teaching Chinese as a foreign language is actually the teaching of Chinese as a second language by international Chinese teachers.People must learn vocabulary as a language element in the process of language acquisiti...Teaching Chinese as a foreign language is actually the teaching of Chinese as a second language by international Chinese teachers.People must learn vocabulary as a language element in the process of language acquisition.Without vocabulary,there is no language.When we master the vocabulary of a language,we rely on mental lexicon,which is vocabulary that has been stored in the brain for a long time.Through the study of second language mental lexicon,it can be used effectively,and corresponding teaching methods can be used in the vocabulary teaching of Chinese as a foreign language to help students learn Chinese quickly and effectively.展开更多
Foreign language motivation is regarded as one source of individual differences in second language acquisition. Learning motivation is a dynamic mechanism which gives rise to learning activities. Learners' motivat...Foreign language motivation is regarded as one source of individual differences in second language acquisition. Learning motivation is a dynamic mechanism which gives rise to learning activities. Learners' motivation is a decisive factor for the success of second language acquisition.展开更多
Background: Intraorbital foreign bodies can result in various complications if not appropriately managed. Aim: To report a case of lower lid entropion secondary to a missed intraorbital foreign body. Case Presentation...Background: Intraorbital foreign bodies can result in various complications if not appropriately managed. Aim: To report a case of lower lid entropion secondary to a missed intraorbital foreign body. Case Presentation: A 7-year-old boy presented with inward turning of the left lower lid for three days prior to admission. A week before, the child was in the garden when part of the roof of their home suddenly broke off, with pieces of the debris falling near him. He complained of left eye irritation, but a visit to a general practitioner found no eye abnormalities. Three days after that, the mother sought an ophthalmology opinion as she noticed inversion of the left lower lid. On examination, visual acuity in both eyes was 6/6. There was left lower lid entropion, and a deeply embedded foreign body seen in the lower lid. No other eye abnormalities noted. Computed tomography scan of the orbits revealed a welldefined foreign object in the lower orbit, fracturing the antero-superior wall of the left maxillary sinus. The left eye foreign body was removed uneventfully via a transconjunctival approach. Conclusion: A thorough examination is mandatory in any case of ocular trauma especially in young children, who are usually unable to provide a clear history of the injury.展开更多
The China Council for the Promotion of International Trade (CCPIT) held the Second Session of the Second Council of its National Congress in the latter half of July. Attending the session were officials in charge of f...The China Council for the Promotion of International Trade (CCPIT) held the Second Session of the Second Council of its National Congress in the latter half of July. Attending the session were officials in charge of foreign economic relations and trade from related Chinese ministries, provinces, municipalities and autonomous regions, chairmen of 46 local and 14 industrial sub-councils throughout展开更多
Not much research has been done on motivation to study a second,third or even fourth foreign language though learners of such languages have been increasing.To contribute to this,the present study examined German lear...Not much research has been done on motivation to study a second,third or even fourth foreign language though learners of such languages have been increasing.To contribute to this,the present study examined German learning motivation of Chinese university students at different proficiency levels.A total of 297 German learners at three different proficiency levels at a university in Beijing filled in the questionnaires,of whom 191 answered the open-ended question and 50 were informally interviewed.Analyses of the data revealed the following major findings;(1)most respondents at cach proficiency level had limited access to and little chance to use German,liked the language,studied it(very)hard and did not think the language was difficult,(2)students at different proficiency levels studied German for similar reasons such as major study/research,further education,future career,interest in foreign language learning and German,and(3)students at higher proficiency levels perceived German to be more difficult and worked harder on it.Students at higher proficiency levels were both integratively and instrumentally more motivated to study German and had greater motivation intensity as well.It is clear that students at different proficiency levels were motivated to study German and that students at the advanced level tended to be more integratively motivated than those at the beginning level.Based on these findings,some suggestions are discussed.展开更多
At the 8th National Congress of the CAS Membership, 10 foreign scholars were elected into the second batch of CAS members with foreign nationalities because of their high academic prestige and indelible contributions ...At the 8th National Congress of the CAS Membership, 10 foreign scholars were elected into the second batch of CAS members with foreign nationalities because of their high academic prestige and indelible contributions to Chinese S&T cause. The namelist is arranged in the alphabetical order. Robert W. Cahn, of British nationality. He is one of world-renowned metallurgists today and noted for his creative work in the fields of recovery,recrystallization, intermetallic compounds and metallic glasses. So far he has some 200 research papers to his credit. In addition, he co-edited with Prof. P. Haasen a monograph Physical Metallurgy, now in its fourth edition, winning him world-wide renown. Also, he initiated and edited (or展开更多
Introduction There is a general consensus among language learning theorists,educational psycholo-gists,and language—teaching professionals that the learning of anything does not occur in avacuum.That is,successful l...Introduction There is a general consensus among language learning theorists,educational psycholo-gists,and language—teaching professionals that the learning of anything does not occur in avacuum.That is,successful language learning of whatever kind comes out only when what isto be learned can be meaningfully related to something that is already known.Learning,inother words,must take place within some kind of familiar context or framework——an ex-tension of the familiar to the unfamiliar,if you will.The natural question to raise,then,iswhat such"frameworks"——and ones familiar to the learner——we might identify for thelearning of second/foreign language grammar.In what way,we are entitled to ask,wouldgrammatical consciousness—raising fit into this roughly—drawn,very general picture of lan-展开更多
To attract outstanding graduates,China’s second-tier cities including Xi’an,capital city of Northwest China’s Shaanxi Province and Chengdu,capital city of Southwest China’s Sichuan Province,have stepped up efforts...To attract outstanding graduates,China’s second-tier cities including Xi’an,capital city of Northwest China’s Shaanxi Province and Chengdu,capital city of Southwest China’s Sichuan Province,have stepped up efforts to lure more foreign talents with incentives and foreigner-friendly services.展开更多
Foreign language teaching practice is developing rapidly,but research on foreign language teacher learning is currently relatively fragmented and unstructured.The book Foreign Language Teacher Learning,written by Prof...Foreign language teaching practice is developing rapidly,but research on foreign language teacher learning is currently relatively fragmented and unstructured.The book Foreign Language Teacher Learning,written by Professor Kang Yan from Capital Normal University,published in September 2022,makes a systematic introduction to foreign language teacher learning,which to some extent makes up for this shortcoming.Her book presents the lineage of foreign language teacher learning research at home and abroad,analyzes both theoretical and practical aspects,reviews the cuttingedge research results,and foresees the future development trend,painting a complete research picture for researchers in the field of foreign language teaching and teacher education as well as front-line teachers interested in foreign language teacher learning.This is an important inspiration for conducting foreign language teacher learning research in the future.And this paper makes a review of the book from aspects such as its content,major characteristics,contributions and limitations.展开更多
Introduction: Spontaneous abortion of the second trimester is an interruption of pregnancy with complete expulsion or not of the product of conception between 15 and 28 weeks of pregnancy without any maneuvers. The ob...Introduction: Spontaneous abortion of the second trimester is an interruption of pregnancy with complete expulsion or not of the product of conception between 15 and 28 weeks of pregnancy without any maneuvers. The objective of our study was to determine the factors associated with second trimester spontaneous abortions at Laquintinie Hospital in Douala. Methodology for this purpose: We conducted a case-control study from January to May 2019 on pregnant women who may or may not have had spontaneous second trimester abortions. Results: In total we recorded 1609 pregnancies and recruited 184 patients, including 46 cases and 138 controls;which gave a frequency of spontaneous abortion in the second trimester of pregnancy of 2.85%. A correlative analysis showed that spontaneous abortions in the second trimester were associated with housewife status (OR = 2.89;CI = 1.21 - 6.79;p = 0.010), gestation > 5 (OR = 4.09;CI = 1.02 - 17.66;p = 0.040), multiparity (OR = 3.81;CI = 1.59 - 9.16;p = 0.002), history of endouterine maneuvers (OR = 5.64;CI = 2.43 - 13 .03;p = 0.000), malaria in pregnancy (OR = 3.99;CI = 1.1 - 14.76;p = 0.030), incompleteness on the second trimester ultrasound (OR = 2.37;CI = 1.18 - 4.70;p = 0.010), jolts when traveling (OR = 46.04;CI = 17.29 - 123.66;p = 0.000), long car journeys (OR = 7.05;CI = 1.99 - 27.77;p = 0.000). After logistic regression eliminating the confounding factors, only the following were associated with abortions: Multiparity (OR = 13.90;CI = 2.96 - 65.18;p = 0.000), endo uterine maneuvers (OR = 3.69;CI = 1. 01 - 13.44;p = 0.047), jolts when traveling (OR = 72.63;CI = 19.47 - 270.96;p = 0.000), long car journeys (OR = 15.41;CI = 2.7 - 85, 95;p = 0.000). Conclusion: Our study reveals that a set of factors contribute to the occurrence of spontaneous abortions in the second trimester of pregnancy in our context.展开更多
From the perspective of language cognition,second language acquisition is a complex cognitive process in which themother tongue and the target language play against each other.In this process,the second language learn...From the perspective of language cognition,second language acquisition is a complex cognitive process in which themother tongue and the target language play against each other.In this process,the second language learner establishes the targetlanguage form by the mother tongue language rules.At the same time,through the continuous acquisition of second language knowl-edge to continuously modify this intermediary system.This article briefly analyzes the impact of the L1 transfer on SLA in the de-velopment of interlanguage,the role of L1 in SLA,and the impact of the L1 transfer on college foreign language teaching.展开更多
The selective aqueous-phase glycerol hydrogenolysis is a promising reaction to produce commercially useful 1,3-propanediol(1,3-PDO).The Pt-WOx bifunctional catalyst can catalyse the glycerol hydrogenol-ysis but the ca...The selective aqueous-phase glycerol hydrogenolysis is a promising reaction to produce commercially useful 1,3-propanediol(1,3-PDO).The Pt-WOx bifunctional catalyst can catalyse the glycerol hydrogenol-ysis but the catalyst deactivation via sintering,metal leaching,and coking can predominantly occur in the aqueous phase reaction.In this work,the effect of reaction temperature,pressure and second promoter(Cu,Fe,Rh,Mn,Re,Ru,Ir,Sn,B,and P)on catalytic performance and deactivation behaviour of Pt/WOx/-Al2O3 was investigated.When doped with Rh,Mn,Re,Ru,Ir,B,and P,the second promoter boosts catalytic activity by promoting great dispersion of Pt on support and increasing Pt surface area.The increased Bronsted acid sites lead to selective synthesis of 1,3-PDO than 1,2-propanediol(1,2-PDO).The characterization studies of fresh and spent catalysts reveal that the main cause of catalyst deactivation is the Pt sintering,as interpreted based on XRD,CO chemisorption,and TEM analyses.The Pt sintering is affected depending on the second promoter that can either or reduce the interaction between Pt,WO_(χ)/γ and Al_(2)O_(3).As an electron acceptor of Pt in Pt/WO_(χ)/γ-Al_(2)O_(3),Re and Mn as second promoters resulted in increased Pt^(2+) on the catalytic surface,which strengthens the contact between Pt andγ-Al_(2)O_(3) and WO_(χ),resulting in a decrease in Pt sintering.The metal leaching and coking are not affected by the presence of second promoter.The catalyst modified with a second promoter possesses improved catalytic activity and 1,3-PDO production,however the stability continues to remain a challenge.The present work unrav-elled the determining parameters of catalytic activity and deactivation,thus providing a promising pro-tocol toward effective catalysts for glycerol hydrogenolysis.展开更多
文摘In this paper, the author will mainly focus on analysis about the differences between characteristics of older learners and young learners in learning second/foreign language.
文摘With the successful hosting of the Beijing Olympic Games in 2008 and the World Exposition Shanghai China 2010,English,next to our mother tongue,has become the most important language in China.Therefore,learning English well is very important for most Chinese people.However,learning a foreign language well is not easy.We have to master several learning strategies and methods to learn it successfully.This paper will help all the foreign language learners to find the effective way in learning the second foreign languge.The paper mainly talks about two aspects:improving the abilities in listening,speaking and reading in order to communicate well;developing the ability of writing in English and perfecting the function of social communication.It gives out the concrete methods in listening,speaking,reading,writing,and translating.The authors hope that the paper would be helpful in assisting the foreign language learners to learn and master the second foreign language.
文摘Hepatic abscess caused by foreign body penetration of the alimentary tract is rare. We report a case of gastric antrum penetration due to a toothpick complicated by liver abscess formation. A 41-year-old man was admitted to our hospital with the chief complaint of upper abdominal pain for 2 mo. Esophagogastroduodenoscopy performed at a local clinic revealed a toothpick penetrating the gastric antrum. Computed tomography (CT) of the abdomen at our hospital revealed a gastric foreign body embedded in the posterior wall of gastric antrum with regional phlegmon over the lesser sac and adhesion to the pancreatic body without notable vascular injury, and a hepatic abscess seven cm in diameter over the left liver lobe. Endoscopic removal of the foreign body was successfully performed without complication. The liver abscess was treated with parenteral antibiotics without drainage. The patient’s recovery was uneventful. Abdominal ultrasonography demonstrated complete resolution of the hepatic abscess six months after discharge. Relevant literature from the PubMed database was reviewed and the clinical presentations, diagnostic modalities, treatment strategies and outcomes of 88 reported cases were analyzed. The results showed that only 6 patients received conservative treatment with parenteral antibiotics, while the majority underwent either image-guided abscess drainage or laparotomy. Patients receiving abscess drainage via laparotomy had a significantly shorter length of hospitalization compared with those undergoing image-guided drainage. There was no significant difference in age between those who survived and those who died, however, the latter presented to hospitals in a more critical condition than the former. The overall mortality rate was 7.95%.
文摘With the process of economic and cultural globalization,the number of second foreign language learners has soared in recent years.Second foreign language learning has been an obvious trend in our times.This essay is devoted to exploring the causes of the phenomenon,the status of our second foreign language learning,the gains,the obstacles and their possible reasons during the learning process of the second-foreign-language learning.This essay falls into a questionnaire and four chapters in the body part.The questionnaire aims to help us find out the current status and the influence of second foreign language learning,the learners' attitude to learning and the material,the practical methods of learning the second foreign language.
文摘Besides the sessions of teaching and learning in language learning activities, language attrition, as the concomitant product of language acquisition, exerts significant impact on language teaching, especially on foreign language teaching. By exploring this phenomenon, some effective ways against language attrition can be found in order to maximize foreign language teaching. This paper is about to illustrate the relevant theories from scholars at home and abroad, and providing some ways to help foreign language learners maintain the language proficiency.
文摘Case Presentation: A nine-year-old boy presented to the general ophthalmologist with a several weeks history of redness, photophobia and intermittent foreign body sensation in the right eye. A pigmented lesion with anterior chamber inflammation was noted on examination. B-scan ultrasound was performed and revealed no foreign body. The patient was diagnosed with anterior uveitis, which did not completely respond to treatment. The differential diagnosis was expanded to include peripheral ulcerative keratitis, phlyctenulosis, pigmented neoplasm, and corneal foreign body. Upon referral to a cornea specialist, an exam under anesthesia revealed a large foreign body consistent with a rock fragment in the peripheral cornea, which was subsequently removed without complication. Conclusion: This case highlights an atypical presentation of foreign body as well as a differential diagnosis of pigmented peripheral corneal lesions. Foreign bodies represent the most common cause of urgent ophthalmic evaluation. When evaluating lesions of the cornea, it is imperative to keep an extensive differential diagnosis, giving the potential for severe and rapid development of visually threatening complications.
文摘This article intends to demonstrate the principles for dictionary compilation.To summarize,general rules are to be followed.At the same time,this article probes into the differences of Chinese to Chinese dictionary,Chinese to foreign language dictionary,dictionaries for the preparation of certain exams,learner’s dictionaries for reviewing errors,dictionaries with multimedia and dictionaries built via the Internet..In all,one of the key factors for dictionary compilation is the professionalism of editors and writers.The training of the people involved is vital,which would contribute to setting up a better order of the market.Acknowledgements should also be given to achievements in dictionary compilation.Revisions and polishing are required to improve the dictionaries on the market that have already won the acclaim so as to put their influence to the best display.
文摘Teaching Chinese as a foreign language is actually the teaching of Chinese as a second language by international Chinese teachers.People must learn vocabulary as a language element in the process of language acquisition.Without vocabulary,there is no language.When we master the vocabulary of a language,we rely on mental lexicon,which is vocabulary that has been stored in the brain for a long time.Through the study of second language mental lexicon,it can be used effectively,and corresponding teaching methods can be used in the vocabulary teaching of Chinese as a foreign language to help students learn Chinese quickly and effectively.
文摘Foreign language motivation is regarded as one source of individual differences in second language acquisition. Learning motivation is a dynamic mechanism which gives rise to learning activities. Learners' motivation is a decisive factor for the success of second language acquisition.
文摘Background: Intraorbital foreign bodies can result in various complications if not appropriately managed. Aim: To report a case of lower lid entropion secondary to a missed intraorbital foreign body. Case Presentation: A 7-year-old boy presented with inward turning of the left lower lid for three days prior to admission. A week before, the child was in the garden when part of the roof of their home suddenly broke off, with pieces of the debris falling near him. He complained of left eye irritation, but a visit to a general practitioner found no eye abnormalities. Three days after that, the mother sought an ophthalmology opinion as she noticed inversion of the left lower lid. On examination, visual acuity in both eyes was 6/6. There was left lower lid entropion, and a deeply embedded foreign body seen in the lower lid. No other eye abnormalities noted. Computed tomography scan of the orbits revealed a welldefined foreign object in the lower orbit, fracturing the antero-superior wall of the left maxillary sinus. The left eye foreign body was removed uneventfully via a transconjunctival approach. Conclusion: A thorough examination is mandatory in any case of ocular trauma especially in young children, who are usually unable to provide a clear history of the injury.
文摘The China Council for the Promotion of International Trade (CCPIT) held the Second Session of the Second Council of its National Congress in the latter half of July. Attending the session were officials in charge of foreign economic relations and trade from related Chinese ministries, provinces, municipalities and autonomous regions, chairmen of 46 local and 14 industrial sub-councils throughout
文摘Not much research has been done on motivation to study a second,third or even fourth foreign language though learners of such languages have been increasing.To contribute to this,the present study examined German learning motivation of Chinese university students at different proficiency levels.A total of 297 German learners at three different proficiency levels at a university in Beijing filled in the questionnaires,of whom 191 answered the open-ended question and 50 were informally interviewed.Analyses of the data revealed the following major findings;(1)most respondents at cach proficiency level had limited access to and little chance to use German,liked the language,studied it(very)hard and did not think the language was difficult,(2)students at different proficiency levels studied German for similar reasons such as major study/research,further education,future career,interest in foreign language learning and German,and(3)students at higher proficiency levels perceived German to be more difficult and worked harder on it.Students at higher proficiency levels were both integratively and instrumentally more motivated to study German and had greater motivation intensity as well.It is clear that students at different proficiency levels were motivated to study German and that students at the advanced level tended to be more integratively motivated than those at the beginning level.Based on these findings,some suggestions are discussed.
文摘At the 8th National Congress of the CAS Membership, 10 foreign scholars were elected into the second batch of CAS members with foreign nationalities because of their high academic prestige and indelible contributions to Chinese S&T cause. The namelist is arranged in the alphabetical order. Robert W. Cahn, of British nationality. He is one of world-renowned metallurgists today and noted for his creative work in the fields of recovery,recrystallization, intermetallic compounds and metallic glasses. So far he has some 200 research papers to his credit. In addition, he co-edited with Prof. P. Haasen a monograph Physical Metallurgy, now in its fourth edition, winning him world-wide renown. Also, he initiated and edited (or
文摘Introduction There is a general consensus among language learning theorists,educational psycholo-gists,and language—teaching professionals that the learning of anything does not occur in avacuum.That is,successful language learning of whatever kind comes out only when what isto be learned can be meaningfully related to something that is already known.Learning,inother words,must take place within some kind of familiar context or framework——an ex-tension of the familiar to the unfamiliar,if you will.The natural question to raise,then,iswhat such"frameworks"——and ones familiar to the learner——we might identify for thelearning of second/foreign language grammar.In what way,we are entitled to ask,wouldgrammatical consciousness—raising fit into this roughly—drawn,very general picture of lan-
文摘To attract outstanding graduates,China’s second-tier cities including Xi’an,capital city of Northwest China’s Shaanxi Province and Chengdu,capital city of Southwest China’s Sichuan Province,have stepped up efforts to lure more foreign talents with incentives and foreigner-friendly services.
文摘Foreign language teaching practice is developing rapidly,but research on foreign language teacher learning is currently relatively fragmented and unstructured.The book Foreign Language Teacher Learning,written by Professor Kang Yan from Capital Normal University,published in September 2022,makes a systematic introduction to foreign language teacher learning,which to some extent makes up for this shortcoming.Her book presents the lineage of foreign language teacher learning research at home and abroad,analyzes both theoretical and practical aspects,reviews the cuttingedge research results,and foresees the future development trend,painting a complete research picture for researchers in the field of foreign language teaching and teacher education as well as front-line teachers interested in foreign language teacher learning.This is an important inspiration for conducting foreign language teacher learning research in the future.And this paper makes a review of the book from aspects such as its content,major characteristics,contributions and limitations.
文摘Introduction: Spontaneous abortion of the second trimester is an interruption of pregnancy with complete expulsion or not of the product of conception between 15 and 28 weeks of pregnancy without any maneuvers. The objective of our study was to determine the factors associated with second trimester spontaneous abortions at Laquintinie Hospital in Douala. Methodology for this purpose: We conducted a case-control study from January to May 2019 on pregnant women who may or may not have had spontaneous second trimester abortions. Results: In total we recorded 1609 pregnancies and recruited 184 patients, including 46 cases and 138 controls;which gave a frequency of spontaneous abortion in the second trimester of pregnancy of 2.85%. A correlative analysis showed that spontaneous abortions in the second trimester were associated with housewife status (OR = 2.89;CI = 1.21 - 6.79;p = 0.010), gestation > 5 (OR = 4.09;CI = 1.02 - 17.66;p = 0.040), multiparity (OR = 3.81;CI = 1.59 - 9.16;p = 0.002), history of endouterine maneuvers (OR = 5.64;CI = 2.43 - 13 .03;p = 0.000), malaria in pregnancy (OR = 3.99;CI = 1.1 - 14.76;p = 0.030), incompleteness on the second trimester ultrasound (OR = 2.37;CI = 1.18 - 4.70;p = 0.010), jolts when traveling (OR = 46.04;CI = 17.29 - 123.66;p = 0.000), long car journeys (OR = 7.05;CI = 1.99 - 27.77;p = 0.000). After logistic regression eliminating the confounding factors, only the following were associated with abortions: Multiparity (OR = 13.90;CI = 2.96 - 65.18;p = 0.000), endo uterine maneuvers (OR = 3.69;CI = 1. 01 - 13.44;p = 0.047), jolts when traveling (OR = 72.63;CI = 19.47 - 270.96;p = 0.000), long car journeys (OR = 15.41;CI = 2.7 - 85, 95;p = 0.000). Conclusion: Our study reveals that a set of factors contribute to the occurrence of spontaneous abortions in the second trimester of pregnancy in our context.
文摘From the perspective of language cognition,second language acquisition is a complex cognitive process in which themother tongue and the target language play against each other.In this process,the second language learner establishes the targetlanguage form by the mother tongue language rules.At the same time,through the continuous acquisition of second language knowl-edge to continuously modify this intermediary system.This article briefly analyzes the impact of the L1 transfer on SLA in the de-velopment of interlanguage,the role of L1 in SLA,and the impact of the L1 transfer on college foreign language teaching.
基金funded by the National Research Council of Thailand (NRCT)the Second Century Foundation (C2F),Chulalongkorn University,ThailandResearcher Supporting Project RSP2024RR400,King Saud University,Saudi Arabia
文摘The selective aqueous-phase glycerol hydrogenolysis is a promising reaction to produce commercially useful 1,3-propanediol(1,3-PDO).The Pt-WOx bifunctional catalyst can catalyse the glycerol hydrogenol-ysis but the catalyst deactivation via sintering,metal leaching,and coking can predominantly occur in the aqueous phase reaction.In this work,the effect of reaction temperature,pressure and second promoter(Cu,Fe,Rh,Mn,Re,Ru,Ir,Sn,B,and P)on catalytic performance and deactivation behaviour of Pt/WOx/-Al2O3 was investigated.When doped with Rh,Mn,Re,Ru,Ir,B,and P,the second promoter boosts catalytic activity by promoting great dispersion of Pt on support and increasing Pt surface area.The increased Bronsted acid sites lead to selective synthesis of 1,3-PDO than 1,2-propanediol(1,2-PDO).The characterization studies of fresh and spent catalysts reveal that the main cause of catalyst deactivation is the Pt sintering,as interpreted based on XRD,CO chemisorption,and TEM analyses.The Pt sintering is affected depending on the second promoter that can either or reduce the interaction between Pt,WO_(χ)/γ and Al_(2)O_(3).As an electron acceptor of Pt in Pt/WO_(χ)/γ-Al_(2)O_(3),Re and Mn as second promoters resulted in increased Pt^(2+) on the catalytic surface,which strengthens the contact between Pt andγ-Al_(2)O_(3) and WO_(χ),resulting in a decrease in Pt sintering.The metal leaching and coking are not affected by the presence of second promoter.The catalyst modified with a second promoter possesses improved catalytic activity and 1,3-PDO production,however the stability continues to remain a challenge.The present work unrav-elled the determining parameters of catalytic activity and deactivation,thus providing a promising pro-tocol toward effective catalysts for glycerol hydrogenolysis.