Athens journal of sciences最新文献

{"title":"Liquid Crystal Display (LCD) based Instruction and Physics Performance","authors":"B. Dolipas, Freda Kate D. Samuel, Kenneth B. Pakipac","doi":"10.30958/ajs.9-3-4","DOIUrl":"https://doi.org/10.30958/ajs.9-3-4","url":null,"abstract":"The study determined the effectiveness of LCD based instruction to academic performance of students in physics concept, physics problem solving and overall physics performance. Respondents were third year students enrolled in the Physics subject under the course Bachelor of Science in Agribusiness. Result showed that both students with and without LCD instruction based instruction have above average performance level on physics concept and overall performance and an average performance in physics problem solving aspect. Male and female respondents also have same physics performance level on concept aspect, problem solving aspect and overall physics performance for both with and without computer-aided instruction. Conduct of similar research is recommended to confirm results of the study. Keywords: LCD, physics performance, sex, PowerPoint presentation, physics concept, problem solving","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45271018","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":"Bio-rationale Management of Tomato Leaf Miner, Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae) Using Extracts of Neem (Azadirachta indica A. Juss) Jimsonweed (Datura stramonium L) and Periwinkle (Vinca rosea L.)","authors":"Elharith H. Bakheit, A. K. Taha, M. E. Mahmoud","doi":"10.30958/ajs.9-3-3","DOIUrl":"https://doi.org/10.30958/ajs.9-3-3","url":null,"abstract":"Recently, tomato leaf miner (TLM) Tuta absoluta (Meyrick, 1917) (Lepidoptera: Gelechiidae), is the most notorious pest of tomato worldwide causing severe reduction of yields in both protected and open fields. In Sudan, the pest was recorded to attack all tomato cultivation areas causing considerable damage affecting income of poor farmers. Various pesticides of different active ingredients are applied excessively and routinely to control T. absoluta in tomato. As known, reliance on insecticide cause adverse impacts in human health, create insect resistance as well as affect environment and natural enemies. This study is initiated to evaluate the efficacy of extracts of 3 botanicals as alternative to synthetic insecticides against T. absoluta. A randomized Complete Block Design field experiment was conducted at Takroof experimental farm of Kassala and Gash Research Station, Sudan during season (2019/2020). The experiment consisted of Neem seed oil, water extracts of Datura, Water extract of Vinca, Dancid®; synthetic insecticide as standard, and non-treated treatment as control. Each treatment was replicated thrice Data included number of infested plants/plot, number of mines/plot, percentage of infested fruits and yield (Ton/ha) were compiled, variance among treatments (ANOVA) was statistically analyzed and means were separated using Duncan Multiple Range Test (DMRT) applying SAS 9 a computer based program. The results of this study, revealed high significant difference between treatments in the number of infested plants/plot, number of active mines/plots for the three assessment times of the post spray counts. Water extract of Datura and Neem seed oil were better than Dancid® and Vinca in reducing the number of infested plants/plots and number of active mines/plots. All test products were significantly same in reduction the percentage of infestation of fruits and they were less than the control. Also high significant difference was observed between treatments on yield. Plots treated with Neem seed oil obtained the highest yield followed by WE of Datura, Dancid®, WE of Vinca with 11.2, 9.9, 9.7, 8.8 (Tons/ha) while the un-treated plots obtained the lowest yield (3.8 Tons/ ha). For their potency, cheapness, easy processing and environmental friendly characters, Neem seed oil, WE of Datura, and WE of Vinca are recommended to be used to control T. absoluta in tomato crop. Keywords: Tuta absoluta neem seed oil, Datura, periwinkle, aqueous extracts","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46043541","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":"Sentiment Analysis of International Relations with Artificial Intelligence","authors":"Dadhichi Shukla, Stephane Unger","doi":"10.30958/ajs.9-2-1","DOIUrl":"https://doi.org/10.30958/ajs.9-2-1","url":null,"abstract":"Geopolitical strategy is characterized by a dynamic and complex structure of entity relationships, geo-spatial data and human decisions. We employ machine and deep learning techniques to retrieve the sentiment between countries through scraping and analyzing news articles. The change in the sentiment score between countries allows to analyze historic developments of international relations as well as to evaluate the primary and secondary network effects of potential events and policy decisions on the global relationship structure. We find that the key for the most accurate real mapping of the sentiment score between countries is the maximization of the quantity of news while simultaneous minimization of the noise added by the news. Moreover, we show the potential of Artificial Intelligence (AI) to improve and forecast international relations. Keywords: Natural language processing, international relations, sentiment analysis, geo-political forecasting.","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48648134","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 Growth of Teacher’s Mathematical Knowledge for Teaching as Participating in a Primary School Teacher’s Professional Learning Community","authors":"Yanli Huang, E. Chin","doi":"10.30958/ajs.9-2-3","DOIUrl":"https://doi.org/10.30958/ajs.9-2-3","url":null,"abstract":"Teacher’s Professional Learning Community (PLC) should effectively operate through sharing teaching resources, professional dialogues, and collaboration to reduce pupil’s learning achievement gaps and make teaching close to their learning experiences through providing learning scaffolding. This study adopts a qualitative research method to investigate the change of participants’ Mathematics Knowledge for Teaching (MKT) of a primary school teacher PLC which has been running for three years. The three research subjects are experienced teachers and none of whom are mathematics or science majors. According to the framework of the MKT (Hill et al. 2008), the qualitative data which include PLC meeting videos, lesson observation sheets, interviews, and learning feedback are analyzed and triangulated by the researchers and other mathematics educators. The results show that PLC may help teachers improve their MKT. At the beginning of the PLC, the discourse was mainly related to the teacher’s Knowledge of Special Content Knowledge (SCK) and Knowledge of Content and Teaching (KCT). It reveals that the participants ought to be energized in SCK and KCT, and the PLC activities should be specially arranged in these two aspects. After the continuous professional dialogue and teaching practices, the teacher’s KCC, Knowledge of Content and Student (KCS), and Special Content Knowledge (SCK) are improved most significantly, which also promotes the student learning achievements. Keywords: mathematics teaching, teacher professional development, teacher professional learning community, mathematics knowledge for teaching","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43809531","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":"Territorial Infrastructure: Drafting of a Calculation Evaluation Method","authors":"E. Negas, Rui Seco","doi":"10.30958/ajs.9-2-2","DOIUrl":"https://doi.org/10.30958/ajs.9-2-2","url":null,"abstract":"This study proposes a method for calculating the level of urban infrastructure and basic urban services on a given territory. It aims to contribute to a more accurate knowledge of the territory and the city, through the creation of an assessment tool for the urban condition, with the goal of overcoming imprecision hindering urban planning and management. Urban infrastructure is here understood in a broad sense, integrating usual urban attributes —roads, pavements, electricity, water supply, sanitation, etc.—but also a set of urban services and equipment traditionally provided by city and urban environment—administration, representation, culture, health, education and security, among others—and also other conditions diagnosed as significant for the current evolutionary trend of extended urbanity, such as mobility—integrating roadways, public transport networks, soft mobility devices and infrastructures —and access to and integration in communication and information networks —voice and data communication, fix and mobile. The development of this calculation method takes into account different relative weights for this set of conditions in order to obtain a balanced assessment of the level of infrastructure. In the future, the next stage will consist of testing in the field in order to fine tune and validate its usability in different scenarios. Keywords: urban condition, territory, infrastructure, measuring systems, calculation","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46539629","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":"Polycyclic Aromatic Hydrocarbons Concentrations in Soils from Power Plant Stations in Universities in Port Harcourt, Rivers State, Niger Delta, Nigeria","authors":"O. Edori, E. S. Edori, Chizoba Theresa Wodi","doi":"10.30958/ajs.9-2-4","DOIUrl":"https://doi.org/10.30958/ajs.9-2-4","url":null,"abstract":"Soil contamination as a result of human interferences with nature is a common occurrence all over the world. Soil samples were collected from three universities (Ignatius Ajuru University of Education (IAUE), University of Port Harcourt (UNIPORT) and the Rivers State University (RSU) in Port Harcourt, Rivers State. The soils were taken at the points where the different institutions generate electricity with diesel powered generators. The soil samples were collected from the surface to a dept of 30 cm and were put into tightly closed glass containers. They were transported to the laboratory and prepared by standard methods of extraction and purification. The extracts were analyzed with a gas chromatography – mass spectrophotometry instrument to obtain the various fractions of PAHs present in the samples. It was observed that all the 16 priorities PAHs were present in all the samples from the station. The total concentrations of PAHs showed that IAUE>UNIPORT>RSU with respective values of 18.18, 16.64 and 16.53 mg/Kg. Benz(a)anthracene was observed to be the most abundant PAH in all the stations with a value of 2.11±0.14, 2.01±0.51 and 2.10±0.57 mg/Kg for IAUE<UNIPORT and RSU respectively. Fingerprinting and source diagnosis identified only one source of PAHs being pyrogenic sources of PAHs in the three stations. Ring size analysis showed the order 2-3>4>5>6 rings. The concentrations of carcinogenic and non-carcinogenic PAHs were almost in equal proportions in the soils examined. Therefore, the workers involved directly with the electrical generation on these campuses should adequately protected and informed on the consequences of contact with the soil and the gases that come out of the exhaust. Keywords: polycyclic aromatic hydrocarbons, soil, fingerprinting, power generating stations, pollution, human influence","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41895132","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":"Urban Farming Models, Ecosystems and Climate Change Adaptation in Urban Environments: The Case of SATURN Pan European Programme","authors":"A. Nikologianni, A. Betta, M. Andreola, Angelica Pianegonda, Gian Antonio Battistel, Anna Ternell, A. Gretter","doi":"10.30958/ajs.9-1-1","DOIUrl":"https://doi.org/10.30958/ajs.9-1-1","url":null,"abstract":"The “System and sustainable Approach to virTuous interaction of Urban and Rural LaNdscapes” (SATURN) project is exploring how resilience at a city scale might be achieved and how the issues of landscape fragmentation, governance and land management can be addressed resulting in a sustainable future. The EIT Climate-KIC SATURN project is based on a collaboration between three cities of very different scales and contexts, those of Gothenburg in western Sweden, Trento in northern Italy, and Birmingham in the United Kingdom. This paper focuses on the ways in which urban farming can become an important tool to mitigate or adapt to climate change in urban environments by exploring how the three major cities of SATURN deal with these concepts. Using the experience gained throughout the SATURN project as well as the strong communication developed within the consortium, the paper introduces the reasons why urban farming is not just an agricultural activity, but it relates to climate awareness, health and an element of community. With the examples of different urban farming models, this research presents the fully entrepreneurial model of Gothenburg, where a business model fosters sustainable and successful small-scale farming through municipal management of small allotments with associated basic infrastructure leased out to entrepreneurs. Public underutilized land is matched with farmers in order for them to scale up their businesses and provide sustainable food, by limiting the shipping distance of the produce. In the Trento case, bottom-up and more institutional processes have been combined to foster short local supply chains through the Nutrire Trento networking process which could benefit from the introduction of a land lease scheme named “banca della terra” (to support agricultural land recovery). The case of Birmingham presents a different model where farming in an urban environment is mostly seen as a support to communities, mental health and awareness, rather than an entrepreneurial activity. The innovation in this paper comes in the form of different European models related to urban agriculture and best practices, demonstrating how abandoned and underutilised public and private land can be regenerated and become an active part of the urban realm. Insights on the ways in which the three different models operate, as well as results on how farming in an urban environment can enhance resilient cities are discussed in this paper. Keywords: urban farming, climate change, landscape ecosystems, entrepreneurial agriculture, community farming","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45863882","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":"Generation, Regeneration and Validation of Binary Secret Keys through Blockchain in IoT Devices","authors":"John M. Medellin","doi":"10.30958/ajs.9-1-2","DOIUrl":"https://doi.org/10.30958/ajs.9-1-2","url":null,"abstract":"This article operationalizes a mathematical root of trust that can be scaled into protection for Internet of Things (IoT) devices. The initial discussion focuses on gated arrays and the generation of 4-way binary keys. Randomization is used in generation of input and sequence keys giving a unique secret key. The probability of successful attack depends on the number of devices and ordinary implementations are well into one in a billion or more. The paper uses the “epoch” concept; a time-dimensioned interval where more blocks are added to the blockchain. The epochs are selected at random and voting, duration, frequency and key roles are also randomized increasing resiliency. The model does not require constant update of IoT storage; only until such time as communication with others is initiated or a request is received. The substantial savings in processing requirements are significant in IoT. A detailed discussion of the management of the blockchain is provided as well as the necessary blocks enabling the approach. The paper includes a sample dialogue using standard TCP/IP communication structures with security protocols and closing remarks aim at extrapolation to cloud and quantum computing. Keywords: blockchain, key management and distribution, internet of things, root of trust, cyber-resiliency","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48158666","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 Fixpoint Combinator in Combinatory Logic – A Step towards Autonomous Real-time Testing of Software?","authors":"Thomas Fehlmann, Eberhard Kranich","doi":"10.30958/ajs.9-1-3","DOIUrl":"https://doi.org/10.30958/ajs.9-1-3","url":null,"abstract":"Combinatory Logic is an elegant and powerful logical theory that is used in computer science as a theoretical model for computation. Its algebraic structure supports self-application and is Turing-complete. However, contrary to Lambda Calculus, it untangles the problem of substitution, because bound variables are eliminated by inserting specific terms called Combinators. It was introduced by Schönfinkel (1924) and Curry (1930). Combinatory Logic uses just one algebraic operation, namely combining two terms, yielding another valid term of Combinatory Logic. Terms in models of Combinatory Logic look like some sort of assembly language for mathematical logic. A Neural Algebra, modeling the way we think, constitutes an interesting model of Combinatory Logic. There are other models, also based on the Graph Model (Engeler 1981), such as software testing. This paper investigates what Combinatory Logic contributes to modern software testing. Keywords: combinatory logic, combinatory algebra, autonomous real-time testing, recursion, software testing, artificial intelligence","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47578641","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":"Pupil’s Fraction Learning based on Board Game Playingn of Confidence Intervals (MICIH) Kernel Density Estimation Approach","authors":"Hao Tsai, E. Chin","doi":"10.30958/ajs.9-1-4","DOIUrl":"https://doi.org/10.30958/ajs.9-1-4","url":null,"abstract":"Primary school pupils have good mathematics learning achievements but lack interest and attitude towards mathematics learning in Taiwan. Therefore, it is necessary and feasible to study how to use game-based learning in mathematics. In this research, the board games are adopted and designed by the team members, and then are integrated into the learning of mathematics fractions. The pre-test and post-test are designed to analyze the effectiveness of pupils using board games for learning and the formation of fraction conceptions, supplemented by interviews to understand pupils’ interest and attitudes changes in learning. Research has found that pupils who only use board games for learning can recognize and read unit fractions, which can achieve the expected learning goals and enhance pupils’ interest and attitude towards mathematics learning. Finally, the limitations of this research study and the directions for future research are also proposed. Keywords: board game, fraction learning, game-based learning, teaching aids","PeriodicalId":91843,"journal":{"name":"Athens journal of sciences","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45070486","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}