An exploratory study on the aspects of vocabulary knowledge addressed in EAP textbooks

Vocabulary knowledge, which plays an important role in foreign or second language (L2) learning, involves a range of aspects such as form and meaning, grammatical functions, or word parts. Little research, however, has investigated how aspects of vocabulary knowledge are addressed in L2 textbooks. This study aims to fill that gap by examining the aspects of vocabulary knowledge that English for Academic Purposes (EAP) textbooks pay attention to. To that end, four EAP textbooks of upper-intermediate and advanced levels were investigated. A total of 873 vocabulary activities were identified and analysed based on Nation (2013) and Brown’s (2011) frameworks. Results show that grammatical functions, associations, and word parts receive the most attention in the EAP textbooks while written form, constraints on use, and spoken form receive the least attention. The findings also demonstrate variations among the EAP textbooks in their amounts of attention to different aspects of word knowledge.status: accepte

A realization model to develop the autopilot system of ships by specializing MDA

This paper presents a method which is based on the Model-Driven Architecture (MDA) and functional blocks to realize effectively the autopilot systems of ships. It brings out an executable MDA process to cover completely the requirement analysis, design and deployment phases of these systems. This process also allows the determined design elements to be customizable and re-usable in the new applications of controlled ship steering systems. The paper indicates straightforwardly the ship dynamic model-to-be used, the Computation Independent Model (CIM) of a ship autopilot system, the Platform Independent Model (PIM) of this system by using the Real-Time Unified Modeling Language (UML), and its Platform Specific Model (PSM) implemented by the functional blocks. Furthermore, the important transformation rules are also brought out and applied to convert the identified PIM into PSM for implementing quickly this system with different industrial frameworks such as the IEC61499 in a programmable controller. Then, its deployment model completely is tested on a model ship with the predetermined program and control performance

Quality of Water used at pig farms in the Red River delta

peer reviewedA research was carried out to evaluate water quality using at 12 different pig farms in Bac Ninh, Hung Yen and Hai Duong provinces. Water samples were taken in two periods from October to December 2006 and from March to April 2007. Physical and chemical parameters were analysed at the laboratory of the Department of Veterinary Parasitology-Inspection and Hygiene - Hanoi University of Agriculture. The results showed that, all water sources using the pig farms came from underground and a half of which was not processed. Contents of COD(H+), COD(OH-), CO2, Cl- in water in Hai Duong and Bac Ninh were exceeded the hygiene standard. Iron content in water in all three provinces was exceeded the hygiene standard. After using a processed system including artificial rain, H2O2 supplement and filter the content of DO, CO2 and Fe in the water reached the permitted hygiene standard

Characterization of pig farms in Hung Yen, Hai Duong and Bac Ninh provinces

peer reviewedIn order to characterization of pig farms in the Red River Delta, a study was conducted on 90 pig farms in Hung Yen, Hai Duong and Bac Ninh provinces from June to December 2006. Results show that most of the pig farms had been built for five years with a small size (0.5 hectare per farm). The invested capital was about 300-400 millions VND per farm. Four main sow groups used in the farms included crossbred exotic sows (51.1%), crossbred sow between local and exotic breeds (14.4%), purebred Landrace and Yorkshire breeds (15.6 and 18.9%, respectively). The boars were various (Duroc 30%, Yorkshire 21%, Landrace 13%, PiÐtrain × Duroc 36% and others). The pigs farms were faced with several difficulties such as limited land, lack of invested capital, uncontrolled quality of breeding pigs, high costs of feed, poor hygiene condition and diseases

ĐẶC ĐIỂM THỦY ĐỘNG LỰC VÀ KHẢ NĂNG TRAO ĐỔI NƯỚC KHU VỰC ĐẦM NẠI (NINH THUẬN) - KẾT QUẢ TỪ MÔ HÌNH DELFT3D

This paper presents the results of research and estimate on the hydrodynamic characteristics and flushing time in Nai lagoon (Ninh Thuan province). The 3D model was set up based on Delft3D modelling system and calibration, validation through measured data of currents, water elevation in typical seasons (rainy and dry). The results showed that tidal amplitude in the lagoon decreases 0.05 - 0.2 m compared to the value in the open sea. The tidal lag in the lagoon is about 1 hour (high tide) and about 1 - 3 hours for low tide. Current velocity in Nai lagoon is always less than 0.2 m/s. Flushing time in Nai lagoon is fairly good compared with other lagoons in Vietnam as well as in the world with the value of about 2.4 - 2.7 days.Bài báo trình bày một số kết quả nghiên cứu, đánh giá đặc điểm thủy động lực và khả năng trao đổi nước ở khu vực đầm Nại (Ninh Thuận) trên cơ sở thiết lập mô hình thủy động lực cho khu vực này. Mô hình 3 chiều (mô hình Delft3D) đã được thiết lập, kiểm chứng từ số liệu đo đạc về dòng chảy, mực nước trong mùa mưa và mùa khô. Các kết quả tính toán mô phỏng cho thấy biên độ triều trong đầm Nại giảm 0,05 - 0,2 m so với ngoài biển, thời gian xuất hiện nước lớn và nước ròng chậm hơn lần lượt là 1 giờ và khoảng 1 - 3 giờ. Vận tốc dòng chảy trong đầm thường có giá trị không lớn hơn 0,2 m/s. Khả năng trao đổi nước giữa đầm Nại và vùng biển phía ngoài tương đối tốt so với các đầm khác ở Việt Nam và trên thế giới. Trong các điều kiện thời tiết bình thường, thời gian cần thiết để thay nước trong đầm bằng nước từ biển là 2,4 - 2,7 ngày

An object-oriented design method to implement the mechatronic system control by using hybrid automata and real-time UML

In this paper, we present a method, which is based on hybrid automata and Real-Time Unified Modeling Language (UML) to analyze and design the control parts of mechatronic systems with input or output events and signals in order to effectively gather their structure and behaviour. We introduce step-by-step analysis and design activities of a controlled mechatronic system such as the specification of its hybrid automaton and realization hypotheses, the identification of object collaborations of this system, the identification of main control capsules, their ports and communication protocols, with their static and dynamic links. These activities are conducted by specializing the iterative life cycle of system development. Then, we indicate important hypotheses, which allow all the identified capsules of this system to make their evolutions. We apply this method to develop an Electro-Hydraulic Governor (EHG) system, which allows the frequency of an electro-hydraulic station to be stabilized

An exploratory study on perspectives of Vietnamese experienced teachers and student teachers toward teachers’ code-switching

There have existed different perspectives on teachers’ use of code-switching (CS) in sec-ond/foreign language (L2) classrooms. While some suggest teachers’ exclusive use of L2 in L2 classrooms, others argue that teachers’ switching to first language (L1) can have val-uable contributions to L2 teaching. Also, little research has examined student teachers’ perspectives on this issue even though student teaching experience plays a significant role in teacher education programmes. This exploratory qualitative study aims to compare the perspectives of student teachers and experienced teachers toward CS use in teaching Eng-lish as a foreign language (EFL) in Vietnam. Data were gathered through semi-structured interviews with fourteen Vietnamese EFL student teachers and experienced teachers. The findings revealed that all student teachers and experienced teachers had positive attitudes toward CS. In line with previous research, CS was reported to be employed for several different pedagogical functions in L2 classrooms, such as explaining grammar points, clar-ifying difficult concepts, checking students’ comprehension, and dealing with students’ misbehaviours. In addition, apart from the previously reported benefits of CS, such as facilitating students’ comprehension, saving time, motivating students, and accommodating students’ low English proficiency levels, the student teachers in this study also maintained that CS could help them address their anxiety in delivering instructions while the experi-enced teachers believed that CS could help them deal with their lack of confidence about their pronunciation and avoid students’ judgements. Based on the findings, this paper suggests that CS could be considered as an instructional strategy and EFL teacher education programs in Vietnam should consider incorporating training on teachers’ CS use to im-prove their awareness and confidence

Evaluation of Anterior Chamber Depth and Anterior Chamber Angle Changing After Phacoemulsification in the Primary Angle Close Suspect Eyes

BACKGROUND: Phacoemulsification surgery has the ability to deeply alter the segment anterior morphology, especially in eye with shallow anterior chamber (AC), narrow anterior chamber angle (ACA). However, the changes of anterior chamber depth (ACD) and ACA on the close angle suspect eyes after phacoemulsification have not been mentioned in many studies. So, we conduct this research. AIM: To evaluate the alteration in the ACA and ACD after phacoemulsification in the close angle suspect eyes. METHODS: Interventional study with no control group. Subjects were the primary angle closure suspect (PACS) eyes, that were operated by phacoemulsification with intraocular lens (IOL) at Glaucoma Department of VNIO from December 2017 to October 2018. RESULTS: 29 PACS eyes with cataract were operated by phacoemulsification with intraocular lens. After 3 months of monitoring, the average ACD augmented from 2.082 ± 0.244 to 3.673 ± 0.222 mm. AOD500 increase from 0.183 ± 0.088 to 0.388 ± 0.132 μm, AOD750 increased from 0.278 ± 0.105 to 0.576 ± 0.149 μm. The TISA500 enlarged from 0.068 ± 0.033 to 0.140 ± 0.052 mm2, TISA750 enlarged from 0.125 ± 0.052 to 0.256 ± 0.089 mm2 at the third month (p < 0.01). CONCLUSION: Phacoemulsification surgery increases the ACD and enlarged the angle in the PACS eyes

Primary Evaluation on Growth Performances of Stress Negative Piétrain Pigs Raised in Hai Phong Province of Vietnam

peer reviewedThe present study was carried out on 19 stress negative Piétrain pigs (Pietrain ReHal), consisting of 13 gilts and 6 young boars imported from Belgium, raised in the livestock farm of Dong Hiep (Hai Phong) in order to evaluate growth performances and their adaptability in the North of Vietnam. Results showed that the average body weight of the whole herd at 2, 4, 5.5, and 8.5 months old was 19.05, 51.05, 85.82, and 119.47 kg, respectively. During the growing periods, except the first stage, the male grew faster than the female and the pigs of the CT genotype grew faster than those of CC genotype although the difference was not significant (P>0.05). The average daily gain (ADG) was 528.56 grams for the whole herd. The ADG was higher for the male (546.48 grams) than for the female (520.29 grams), and its was higher for the CT than the CC, but the difference was not statistically significant (P>0.05). The feed conversion ratio (FCR) was 2.69 kg. The estimated lean percentage at 8.5 months old was 64.08%. The results indicate that Piétrain stress negative pigs could develop well on the farm conditions in Hai Phong, Vietnam