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Sharma (2012) shows the positive and direct impact of research and development on business results of enterprises. Research and Development (R&D) investment is known as a key direction in creating competitive advantage of enterprises in the globalization context. This study aims to determine the impact of R&D investment on the business performance of food processing industry listed on the Vietnam stock exchange. The results show that R&D investment has a positive effect on business performance. In which, the factors of R&D fund and firm size have a positive impact on business performance. From this result, food processing industry listed on the Vietnam stock exchange need to determine the right position and importance of R&D investment, should allocate more budget for research and development to improve business efficiency.

IntroductionThis study aims to assess the requirement for anxiety and depression treatment for patients with coronavirus disease 2019 (COVID-19) in medical camps in Bac Giang province, Vietnam. This information can help improve the government policy to reduce anxiety and depression in patients with COVID-19.MethodsA total of patients with 427 COVID-19 participated in the survey conducted from 5 to 15 June 2021 in Bac Giang province. The survey included 17 questions about the general characteristics of the patients, 15 questions to assess common COVID-19 symptoms, the Patient Health Questionnaire-9 (PHQ-9), and General Anxiety Disorder-7 (GAD-7) scores, and four questions to assess hospital reviews, including facilities, food, medical staff, and living conditions. Logistics regression analyses were conducted to assess the association between COVID-19 symptoms and high anxiety and depression (HAD) status.ResultsA logistic regression analysis evaluated the risk factors in need of intervention. Our study showed that lower hospital review scores (odd ratio = 0.98; 95% confident interval = 0.97–0.99) were found to be a risk needing intervention. It was also identified that older patients (odd ratio = 1.1; 95% confident interval = 1.03–1.18), women (odd ratio = 1.31; 95% confident interval = 1.09–1.31), patients who were primary income earners in the family (odd ratio = 1.15; 95% confident interval = 1.03–1.28), patients who had headaches (odd ratio = 1.16; 95% confident interval = 1.06–1.21), and patients who had joint pain (odd ratio = 1.17; 95% confident interval = 1.06– 1.3) were risk factors for HAD status.ConclusionOur research shows that every 10-year age increase was associated with a 10% increase in the likelihood of HAD status. Study subjects being primary income earners were also associated with a 15% increased risk of having HAD status. This study showed that a decrease in family income due to COVID-19 caused an increase in high-level anxiety/depression status.

Background: Social media marketing has been used to facilitate communications and interactions between customers and brands and is considered as the effective driver to influence the customers’ buying behaviours and loyalty. Since its emergence in Vietnam market, Samsung smartphone brand has secured a considerable market share in this country and has activated some social media platforms to stay connected with its customers. Though the social media marketing activities and their impacts on brand loyalty have been studied by a number of researchers, the specific case of the smartphone industry has not been eyed enough. Purpose: The purpose of this study is to investigate how social media marketing activities influence brand loyalty with the specific case of Samsung smartphones in Vietnam. Method: The chosen approach to address the purpose of this study is deductive. Descriptive design and quantitative technique are purposefully selected to form a structure of methodology of this study. Specifically, the data collected via the tool of survey questionnaires which were delivered to respondents through social media platforms to yield out 197 usable answers. Conclusion: The results show that the six elements of social media marketing activities, namely: Entertainment, Interaction, Trendiness, Customization, Word of Mouth and Promotion have positive correlations with Brand loyalty. With some differences in terms of responses from different age groups and genders in each category towards the dimensions being utilized on social media sites, the brand is suggested to give a better focus on the importance of Entertainment and Promotion. Also, the platforms of Instagram and Youtube should be better managed to attract and satisfy a larger number of followers.

Education management of life skills to cope with climate change and calamity disaster prevention for the sustainable development of ethnic minority students at ethnic minorities boarding high schools in the Northwestern region is conducted mainly through integrating the content of life skills education in response to climate change and preventing natural disasters for ethnic minority students into teaching basic subjects, through extra-curricular educational activities, through Extracurricular activities, labor and collective activities. Education on life skills to respond to climate change and disaster prevention for the sustainable development of ethnic minority students in recent years has just stopped at the implementation of the documents of Ministry of Education and Training (MOET), Departments of Education and Training (DOET). Some ethnic minority boarding high schools have not been proactive in developing a plan to implement the task of educating life skills to cope with climate change and prevent natural disasters for the sustainable development of ethnic minorities students, not well directed education forces in schools and diverse forms of life skills education to respond to climate change and disaster prevention for the sustainable development of ethnic minorities students. Through the in-depth analysis of research results in the period of 2013-2019, the author of this paper has presented a system of effective management solutions for education of life skills to cope with climate change and avoid natural disasters for the sustainable development of ethnic minority students in ethnic minorities boarding high schools in the Northwest region in the current period.

Through survey results on the status of management of life skills education activities to cope with climate change and disaster prevention for the sustainable development of local communities in the ethnic minority boarding high schools in the Northwestern region from 2013 to 2018, the author deeply analyzed and assessed the strengths, weaknesses, causes of strengths and weaknesses of the management of education activities on life skills to cope with climate change and disaster prevention for the sustainable development of local communities for ethnic minority students at boarding high schools for ethnic minorities in the Northwestern region in the present period and the issues raised.

Introduction The purpose of this study was to evaluate the treatment effects of maxillary posterior tooth distalization performed by a modified palatal anchorage plate appliance with cephalograms derived from cone-beam computed tomography. Methods The sample consisted of 40 lateral cephalograms obtained from the cone-beam computed tomography images of 20 Class II patients (7 men, 13 women; average age, 22.9 years) who underwent bilateral distalization of their maxillary dentition. The lateral cephalograms were derived from the cone-beam computed tomography images taken immediately before placement of a modified palatal anchorage plate appliance and at the end of distalization. Paired t tests were used for comparisons of the changes. Results The distal movement of the maxillary first molar was 3.3 ± 1.8 mm, with distal tipping of 3.4° ± 5.8° and intrusion of 1.8 ± 1.4 mm. Moreover, the maxillary incisors moved 3.0 ± 2.7 mm lingually, with lingual tipping of 6.2° ± 7.6° and insignificant extrusion (1.1 mm; P = 0.06). The occlusal plane angle was increased significantly ( P = 0.0001). Conclusions The maxillary first molar was distalized by 3.3 mm at the crown and 2.2 mm at root levels, with distal tipping of 3.4°. It is recommended that clinicians should consider using the modified palatal anchorage plate appliance in treatment planning for patients who require maxillary total arch distalization.

Objective: This study was aimed at comparing the mandibular arch forms of Korean and Vietnamese patients by using facial axis (FA) points on threedimensional (3D) models. Methods: Mandibular casts of 68 Korean (Class I malocclusion, 30; Class II malocclusion, 38) and 78 Vietnamese (Class I malocclusion, 41; Class II malocclusion, 37) patients were scanned in their occluded positions and grouped according to arch form (tapered, ovoid, and square). The FA point of each tooth was digitized on the 3D mandibular models. The measurements and frequency distributions of the arch forms were compared between the ethnic groups. Results: The Vietnamese patients had significantly greater intercanine depth and intercanine and intermolar width-to-depth ratios than the Korean patients (p < 0.05). The frequency distributions of the arch forms were also significantly different (p = 0.038), but no sexual dimorphism was found. Conclusions: Vietnamese people tend to have deeper and wider arches than Korean people. The three arch forms are evenly distributed in Korean people, but Vietnamese people frequently have square arches. Clinicians should identify the correct arch form of an ethnic group before initiating orthodontic treatment.

The purpose of this study was to investigate the three-dimensional (3D) morphologic differences in the mandibular arch of Vietnamese and North American White subjects. The sample included 113 Vietnamese subjects (41 Class I, 37 Class II and 35 Class III) and 96 White subjects (29 Class I, 30 Class II and 37 Class III). The samples were regrouped according to arch form types (tapered, ovoid, and square) to compare the frequency distribution of the three arch forms between ethnic groups in each angle classification. The facial axis point of each tooth was digitized on 3D virtual models. Four linear and two ratio variables were measured. In comparing arch dimensions, the intercanine and intermolar widths were wider in Vietnamese than in Whites (p < 0.001, p = 0.042, respectively). In the White group, there was even frequency distribution of the three arch forms. However, in the Vietnamese group, the square arch form was the most frequent followed by tapered and ovoid arch forms. The arch forms of Whites were narrower than Vietnamese. In North American Whites, the distribution of the arch form types showed similar frequency. In Vietnamese, the square arch form was more frequent.