湖南大学学报(自然科学版)最新文献

{"title":"Identification of Anti-SARS-CoV-2 of Phyllantus Niruri, Curcuma Xanthorrhiza, and Orthosiphon Aristatus Secondary Metabolites through In Silico Studies","authors":"","doi":"10.55463/issn.1674-2974.50.7.6","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.7.6","url":null,"abstract":"","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70999184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential Analysis of Surface Water Balance in the Water District of the Kali Lamong Watershed, Indonesia","authors":"","doi":"10.55463/issn.1674-2974.50.9.7","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.9.7","url":null,"abstract":"This research intends to evaluate the water availability condition and the development in the future in the water district of Kali Lamong Watershed, so the quantitative study that integrates the supply and demand at every water district is integrated from upstream until downstream, is necessary to be carried out. The methodology consists of comprehensive quantitative analysis to the water resources including the supply and demand in the water districts that have been carried out. Missed from the uncertainty that is big enough related with the development in the future, the water management nowadays and in the future can be seen from the analysis result of water balance potency that is carried out in each water district. Based on the analysis result of water balance that is carried out, there is obtained that the water balance in each water district gives the information about water surplus and deficit. Water deficit in the future is happened in the water district of Lamong Hulu, Sabeng, and Kalitemu, meanwhile the water surplus is happened in the water district of Lamong Tengah, Ngrembeng, and Lamong Hilir. The period of water deficit in the water district is very short by the small dimension. In 2100, the water deficit of Lamong Hulu water district will be about -1.024 m 3 /s, in the Sabeng water district - about -2.99 m 3 /s, and in the Kalitemu water district - about -2.128 m 3 /s. Keywords : watershed, water balance, water district, Kali Lamong. https://doi.org/10.55463/issn.1674-2974.50.9.7","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"259 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135502244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring Trigonometric Treasures: A Dynamic Approach to Teaching the Sine and Cosine Functions Using Realistic Mathematics Education and GeoGebra - A Case Study","authors":"","doi":"10.55463/issn.1674-2974.50.7.24","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.7.24","url":null,"abstract":"This study is situated within the framework of realistic mathematics education (RME) and presents a classroom proposal aimed at illuminating and modeling everyday periodic phenomena. Emphasis is placed on recognizing periodic functions as fundamental tools for characterizing the sine and cosine trigonometric functions. The investigation uses the concept of mathematization levels to delineate the transition from informal to formal knowledge through real-world problem-solving using the GeoGebra platform. This research was conducted with tenth-grade students at the San Vicente Educational Institution in the Buenaventura District. The outcomes reveal that students engaged in activities, and subsequent analyses demonstrate a nuanced understanding of periodic phenomena within realistic contexts. This comprehension encompasses proficiency in various representation systems, including tabular, graphical, and algebraic methods. Moreover, the process of progressing from informal to formal knowledge is marked by incremental levels of mathematization, encompassing both horizontal and vertical processes. The main focus of this research is to characterize the process of mathematization within a realistic context, particularly concerning the sine and cosine trigonometric functions, and evaluate the strengths and limitations of this approach. This study underscores the potential of RME for elucidating intricate mathematical modeling processes within real-world contexts. These insights underscore the value of integrating authentic scenarios to foster a comprehensive understanding of mathematical concepts. Challenges are also acknowledged, particularly in achieving the formalization of generalized models. Thus, this research contributes to discussions on effective mathematics education by showcasing the transformative potential of contextualized pedagogical strategies. Keywords: realistic mathematics education, trigonometric functions, levels of mathematization, context, levels of understanding. https://doi.org/10.55463/issn.1674-2974.50.7.24","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135609452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Safety Gap Factor-Based Lane-Changing Trajectory Planning Model","authors":"","doi":"10.55463/issn.1674-2974.50.8.14","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.8.14","url":null,"abstract":"In discretionary lane changing (DLC) decision models, software-based vehicles should be controlled using safe and comfortable trajectories. The simulated lateral and longitudinal trajectories are approximate trajectories, whereas the calibrated models provide more appropriate trajectories. Very few studies have used the calibration method to find safe and comfortable lateral trajectories at the starting and ending places of lane changing (LC); however, no study has provided safe and comfortable lateral and longitudinal trajectories at these places. This study uses calibrated lateral and longitudinal trajectory models with a comfortable lateral trajectory to pinpoint the safety gap at the target lane during LC. The updated LC trajectory model, in which the adopted lateral and longitudinal trajectory parameters are calculated, is calibrated using a genetic algorithm. This study indicated that the average root mean square error (RMSE) value is 0.93 ( f ) of calibrated data decreasing more than 70%, whereas the average RMSE value of simulation data is 1.93 ( f ). Additionally, the longitudinal positions during LC have an average RMSE value of 0.93 ( f ), while the simulation model's average RMSE value is 1.94 ( f ). Depending on the dataset used, the proposed safety gap can be applied in traffic software while DLC decision models such as binary logistic and game theory models are used. Keywords: lane changing, transportation planning, gap acceptance, safety factors, game theory model. https://doi.org/10.55463/issn.1674-2974.50.8.14","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136004650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perception, Intention, and Buying Behavior of Vietnamese Consumers of Organic Food Products","authors":"","doi":"10.55463/issn.1674-2974.50.8.1","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.8.1","url":null,"abstract":"This study aimed to explore how consumers perceive organic food products, their behavioral intentions, and actual purchasing behavior toward organic products . This study reviewed the literature on planned behavior theory, emphasizing the link between beliefs and behavior. It has been applied to studies of the relationship between ideas, perception, behavioral intentions, and buying behavior, which is described in the article - the research use of the theory of planned behavior on organic food products. The data used in the study were collected through 344 questionnaires conducted at supermarkets in the Hanoi and HCMC areas using the convenience sampling method. Exploratory factor analysis (EFA) using principal ingredient extraction and varimax rotation was performed to assess consumer perception of organic products. Confirmatory Factor Analysis (CFA) then confirmed four aspects of organic food products perceived by consumers, with a total Variation explained. The findings show that consumers’ perceptions of the product safety, health, environmental friendliness, and animal welfare greatly influence their intention to buy organic food. In contrast, consumers’ perceived quality of organic food products has a negligible impact on their purchase intentions. The actual purchase behavior of organic food products is significantly influenced by the intent to purchase the product. The findings of this study provide valuable information to help marketers develop effective marketing strategies to convince consumers to be interested in organic food and enhance environmentally friendly purchasing behavior in Vietnam. Keywords: customer’s perception, purchase intention, purchase behavior, organic food products. https://doi.org/10.55463/issn.1674-2974.50.8.1","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135911609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relationship between Urban Growth and Water Pollution: Experience of Kano Metropolis, Nigeria","authors":"","doi":"10.55463/issn.1674-2974.50.8.6","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.8.6","url":null,"abstract":"Rapid urban and population growth in the Kano metropolis is causing a total distortion of the natural environment and affecting the environmental quality for human habitation. This study evaluates the extent of water pollution to urban growth environmental impacts in the Kano metropolis. Water pollution samples were taken from existing historic ponds in the metropolis. Two ponds were selected: Haura Wanki with coordinates 11.98319500 and 08.50883333 located along Bayero University Road and Shema Pods with coordinates 12.00631333 and 08.50623333 located in Dala local government along Wudil Road. Selection is based on their location. The sample water was analyzed in the laboratory for physicochemical elements. COD, color, t-hardness, salinity, suspended solid, nitrate, nitrite, iron, cobalt, copper, manganese, and nickel were considered in the study. Water quality results reveal suspended solid contents and the salinity level of the Shema Ponds as (248 mg/l and 25 mg/l) and Hauran Wanka Pond with (61 mg/l and 20 mg/l) but Color and t-hardness Hauran Wanka Ponds indicate (501 ml/g and 0.16 mg/l) and Shema Pond with (290 mg/l and 0 mg/l). The water pollution demonstrates that both Ponds are highly polluted because of residents’ solid waste dumping in them, sewer discharge in them, and other pollutants discharged in them. This calls for proactive and effective urban management water pollution guidelines to be developed for the metropolis, which could also be used in Africa and developing nations globally. Keywords: urban growth, water pollution, Kano metropolis, ponds. https://doi.org/10.55463/issn.1674-2974.50.8.6","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135911613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AHP GIS-Based Gully Erosion Susceptibility Modelling in Tropical Volcano Environment","authors":"","doi":"10.55463/issn.1674-2974.50.2.20","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.2.20","url":null,"abstract":"","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70994005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Various Parameters and Impact of Pharmacist Intervention at Retail Medical Stores or Pharmacies of Sindh, Pakistan","authors":"Ajmal Hudda Bhutto, Abdullah Dayo, Ubed Ur, Rehman Mughal, M. Ghoto, R. Parveen","doi":"10.55463/issn.1674-2974.50.2.21","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.2.21","url":null,"abstract":": A cross-sectional, interventional study was conducted on 1000 retail medical stores/pharmacies selected conveniently from seven divisions of Sindh. A well-designed questionnaire was developed for the collection of data","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70994096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Relationship between Gadget Addiction, Student's Knowledge, and Participation Level in Traditional Games","authors":"","doi":"10.55463/issn.1674-2974.50.2.19","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.2.19","url":null,"abstract":"","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70994300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Marketing in the Metaverse: Evaluation through the 7P Marketing Mix","authors":"Mert Mentes, Sevinj Omarli","doi":"10.55463/issn.1674-2974.50.3.14","DOIUrl":"https://doi.org/10.55463/issn.1674-2974.50.3.14","url":null,"abstract":": The Covid-19 pandemic has led to marginal changes in traditional lifestyles and standards, and technological developments that bring physical reality closer to virtual reality, with the increasing influence of the digital revolution. Among these developments, Metaverse stands out the most, and due to its projection dating back much earlier than the Covid-19 pandemic, it provides the most systematic presentation as a virtual reality. With its collection of online worlds and lives, Metaverse can cause radical changes in daily life and, therefore, deserves special attention. As an alternative universe concept offered to people, this area is envisioned to provide all kinds of social interaction services, such as shopping, advertising, digital production, marketing, security, education, entertainment, and any other type of social interaction that comes to mind, just like in daily life. To benefit from these services, it is necessary to be present in the Metaverse universe as a unique avatar user. Users will be able to buy and sell digital objects with blockchain-based digital currencies, participate in digital partnerships and ventures, create digital markets, and thus increase their digital profits and pleasures. While Metaverse marketing is not based on a different logic than marketing in physical reality, it can bring a new dimension to the science of marketing as it provides a freedom-oriented activity area unencumbered by classical limitations due to blockchain advantages. A new field of activity is emerging that greatly expands the limits of marketing science with Metaverse, and all marketing actors should position themselves in the most accurate and timely manner against this innovation. This article discusses the philosophy, birth, operation, components, and development direction of Metaverse marketing based on the 7P marketing mix.","PeriodicalId":15926,"journal":{"name":"Journal of Hunan University Natural Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70995085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}