分子遺伝学的手法を用いたわが国メロン品種の多様性と分類

For the breeding of Japanese netted melon, various types of foreign cultivars have been utilized for improving adaptability, disease and pest resistance, fruit quality and so on. However, little is known about their genetic diversity and relationships, since most cultivars derived from crosses between various horticultural groups. To figure out the genetic structure of Japanese melon, in this study, 57 melon accessions from three horticultural groups were examined using 55 RAPD markers produced by 24 RAPD primers. Genetic diversity of the Japanese netted melon was as high as those of cultivar groups of Groups Cantalupensis and Inodorus, while it was low in Group Conomon irrespective of large variations in fruit traits. Cluster analysis and PCO analysis based on genetic distance showed that Group Conomon was distantly related to other melon accessions. Among the latter, European cantaloupe (nonnetted) and American open-field type (netted) proved to be genetically close, while England glasshouse melon (netted) including ‘Earl’s Favourite’ is distantly related to these two groups and closely related with Group Inodorus. It was therefore suggested that England glasshouse type was established from hybrids between European cantaloupe and Group Inodorus. Japanese netted melon was most closely related with England glasshouse type, irrespective of the fact that various kinds of melon accessions have been crossed to improve adaptability, disease resistance and so on. In contrast, pure line cultivars of the Japanese netted melon bred by pure line selection from ‘Earl's Favourite’ or by crossing ‘Earl’s Favourite’ with ‘British Queen’ were confirmed to be mostly homogenous, and it was difficult to establish RAPD markers to discriminate each cultivar. Group Conomon var. makuwa and var. conomon, which have been cultivated and utilized as different crops, proved to be genetically indistinguishable and were considered to share the same gene pool

Building a temperature forecasting model for the city with the regression neural network (RNN)

In recent years, a study by environmental organizations in the world and Vietnam shows that weather change is quite complex. global warming has become a serious problem in the modern world, which is a concern for scientists. last century, it was difficult to forecast the weather due to missing weather monitoring stations and technological limitations. this made it hard to collect data for building predictive models to make accurate simulations. in Vietnam, research on weather forecast models is a recent development, having only begun around 2000. along with advancements in computer science, mathematical models are being built and applied with machine learning techniques to create more accurate and reliable predictive models. this article will summarize the research and solutions for applying recurrent neural networks to forecast urban temperatures.Comment: 6 page

The perspective of psychology students on the areas of psychology

Perception is defined as the result of an awareness process about phenomena, things (living animals, plants, or humans), connections between objects by activities including noticing, observing, differentiating, and acknowledging. A recent study was conducted to investigate the undergraduate’s perception of areas of psychology. This research used the Vietnamese version of the Scale of Interests by Areas of Psychology (EIAPsi), including ten subscales to survey 252 psychology students (57 males and 195 females) from four universities in Vietnam. The findings showed significant effects of university and major on psychology undergraduate’s perception of areas of psychology. Students majoring in Counseling and Clinical Psychology had more general knowledge about the functions and roles of Clinical and Health Psychology and Neuropsychology than other undergraduates. Industrial and Organizational Psychology students had more general knowledge about Organizational Psychology than students in other majors

Dynamical behavior of damaged railway sleeper subjected to moving loads: Parametric study of crack properties

This study investigates the dynamic responses of cracked beams placed on a visco-elastic foundation and subjected to moving loads. Utilizing the Euler–Bernoulli beam model, the behavior of the beams is characterized, accounting for multiple open cracks on one side with varying depths. Through the application of Fourier transform techniques and Green's function, the dynamic response of the beam is analytically determined in the frequency domain. Furthermore, an analytical model for railway sleepers is developed by integrating them with a periodically supported beam model. This integrated model enables efficient computation of the dynamic behavior of damaged sleepers, where cracks are present at specific locations. Additionally, a calculation model utilizing the finite element method is established and compared with the analytical model. The parametric study shows the influence of crack properties on the dynamic beam responses

Một Số Điểm Tương Đồng Và Khác Biệt Trong Tư Tưởng Triết Học Của Maurice Merleau – Ponty Và Trần Đức Thảo

Maurice Merleau – Ponty is a French philosopher and political activist with close ties to Tran Duc Thao. The two not only had a relationship between teachers and students and colleagues at the ENS Paris - where Tran Duc Thao studied and worked, but also participated in the magazine Les Temps modernes. Merleau - Ponty's thought is therefore one of the sources of thought that has a great influence on Tran Duc Thao's philosophy. However, Tran Duc Thao's philosophical views, in phenomenology, dialectical materialism and in socio-political concepts, have striking similarities and differences with Merleau - Ponty's thought

Vietnamese nursing students\u27 perspectives on learning environments: A multisite benchmarking study to inform future initiatives

This study investigated Vietnamese undergraduate Bachelor of Nursing students\u27 perceptions (n=891) of their education environment during university and clinical experiences in health care, within new competency-based curriculum contexts in four universities across Vietnam. Results inform future change in nursing education provision at both organisation and national level