Lebanese Science Journal最新文献_第2页

3D non-linear numerical model, developed to predict the mechanical behaviour of simply supported steel-concrete composite beams under three-point bending stress 三维非线性数值模型，用于预测钢-混凝土组合简支梁在三点弯曲应力下的力学性能

Lebanese Science Journal Pub Date : 2022-06-28 DOI: 10.22453/lsj-023.1.048-060

Ghenam Abada, M. Tehami, Abdelrahmane Bekkadour Benyamina

{"title":"3D non-linear numerical model, developed to predict the mechanical behaviour of simply supported steel-concrete composite beams under three-point bending stress","authors":"Ghenam Abada, M. Tehami, Abdelrahmane Bekkadour Benyamina","doi":"10.22453/lsj-023.1.048-060","DOIUrl":"https://doi.org/10.22453/lsj-023.1.048-060","url":null,"abstract":"This paper presents a 3D non-linear numerical model, developed to predict the mechanical behaviour of simply supported steel-concrete composite beams under three-point bending stress. Using on Abaqus software a 3D model is created, which takes into account all the elements of the steel-concrete composite beam. The concrete slab, steel beam, and studs are modeled using solid elements, reinforcing bars are neglected. The geometrical and mechanical characteristics are based on beams tested in previous studies. The non-linear behaviour of steel-concrete materials is considered and the interaction between the different surfaces is taken into account. The deflection and slip results at the interface of slab and steel sections showed good agreement with experimental and analytical results. The maximum load value is close to that obtained by a plastic analysis of the composite section according to the Eurocode (1994) rules, with a relative deviation of 10%. Furthermore, the behaviour of increasing the reinforcing plate thickness on the composite beam gives an increase in maximum load and a decrease in the slip at the steel-concrete interface.","PeriodicalId":31081,"journal":{"name":"Lebanese Science Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47581523","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}

引用次数: 0

An improved pricing approach based on combinatorial auction method in cloud environment 云环境下基于组合拍卖方法的改进定价方法

Lebanese Science Journal Pub Date : 2022-06-28 DOI: 10.22453/lsj-023.1.061-077

Seyyed-Mohammad Javadi-Moghaddam, Hamid Mohammadi Fard

引用次数: 0

Ecological risks from trace elements in Quaternary agricultural soils of Lebanon- East Mediterranean. 黎巴嫩-东地中海第四纪农业土壤微量元素的生态风险。

Lebanese Science Journal Pub Date : 2022-03-02 DOI: 10.22453/lsj-022.2.185-208

Talal Mohamad Darwish, M. Hamzé, B. Nsouli

{"title":"Ecological risks from trace elements in Quaternary agricultural soils of Lebanon- East Mediterranean.","authors":"Talal Mohamad Darwish, M. Hamzé, B. Nsouli","doi":"10.22453/lsj-022.2.185-208","DOIUrl":"https://doi.org/10.22453/lsj-022.2.185-208","url":null,"abstract":"Soil contamination by trace elements (TE) causes health and environmental risks. This work focused on arable lands of Central Bekaa of Lebanon, East Mediterranean. The spatial distribution of TEs in the cultivated soils was mapped. Results showed accumulation of Cr and Ni, in the soil-plant interface layer, exceeding the multifunctional land use (soil threshold I <50 and <40 mg kg-1 , respectively) and controlled land use (soil threshold II-100 mg kg-1 ). The index of geoaccumulation (Igeo) showed no hazards from Zn with moderate to strong contamination from Pb and moderate hazard from Ni, Cu, Cd and Cr. A cross sectional soil sampling from the Litani river to the eastern hill of Terbol showed accumulation of TEs at foot slopes and at river’s banks. Human activities within the plain contribute to further soil contamination with risk of pollutants transfer to food chain. Additional sampling of plant and corresponding soil in hot spots showed TE content in the plant leaves to be mostly within or slightly above the permissible values in wheat and potato. Considering the soil quality regarding chemical pollution is a necessary factor in land use planning for the elaboration of adapted to local soil conditions thresholds of TEs content in the soil for suitable land use, either in agriculture or alternative uses.","PeriodicalId":31081,"journal":{"name":"Lebanese Science Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44629647","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}

引用次数: 0

Factors affecting post-fire, vitality and recovery of cork oak trees in Yifri forest (NorthWest of Algeria). 影响Yifri森林（阿尔及利亚西北部）软木橡树火灾后、活力和恢复的因素。

Lebanese Science Journal Pub Date : 2022-03-02 DOI: 10.22453/lsj-022.2.148-164

Ayyoub Bouazzaoui, Rachid Tarik Bouhraoua, Mohammed Ghefar

引用次数: 0

The effects of various tillage systems on soil structure and root system development in wheat (Triticum durum Desf.). 不同耕作制度对小麦土壤结构和根系发育的影响。

Lebanese Science Journal Pub Date : 2022-03-02 DOI: 10.22453/lsj-022.2.165-184

Smain Echcherki, Mohamed Amine Feddal, R. Labad

{"title":"The effects of various tillage systems on soil structure and root system development in wheat (Triticum durum Desf.).","authors":"Smain Echcherki, Mohamed Amine Feddal, R. Labad","doi":"10.22453/lsj-022.2.165-184","DOIUrl":"https://doi.org/10.22453/lsj-022.2.165-184","url":null,"abstract":"The objective of our study is to compare the effect of agricultural soil preparation on the physicomechanical properties of the soil and the consequences on the root system of wheat. To achieve these goals, three technical tillage chains (chain 1: deep tillage, chain 2: agronomic tillage, chain 3: no-tillage), were compared in the same pedoclimatic and historical situations. The experiment was carried out on silty clay soil in the experimental station of the National Higher School of Agronomy (Algiers). The results show that the techniques affect soil’s proprieties and the root system differently. The agronomic tillage has the best favorable effect on soil humidity, Bulk density, and soil Penetration resistance (11,1%; 50%; 0.6 MPa) (p-value :0,0001). Concerning the roots, the density, the diameter, and length were better when the soil is deeply tilled, non-tilled, or agronomical tilled, respectively (CH1:3.37 g/dm³; CH3:1.38 mm; CH2:12.23 cm). Examining all the results of this study has shown how tillage is reflected in and contributes to the farmer's orientation towards the right choice to optimize and conserve soil and water at the same time. Thus, under this study's experimental conditions, the technical itinerary of tillage with agronomic ploughing seems to be an alternative to conventional ploughing. This method of tillage is easily feasible from a technical point of view. Besides, it can generate economic gains compared to ploughing. However, its impacts on the soil and crop yields need to be studied in the longer term.","PeriodicalId":31081,"journal":{"name":"Lebanese Science Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41830338","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}

引用次数: 0

Mathematical Modeling of Ecological Systems Algorithm. 生态系统数学建模算法。

Lebanese Science Journal Pub Date : 2022-03-02 DOI: 10.22453/lsj-022.2.209-231

Abdel-Razzak Merheb, H. Noura, F. Bateman

引用次数: 0

Novel air sterilization process for clean air production and microbial spread limitation using protection devices. 新型空气灭菌工艺，清洁空气生产和微生物传播限制使用保护装置。

Lebanese Science Journal Pub Date : 2022-03-02 DOI: 10.22453/lsj-022.2.232-241

J. Assaf, Regina Geitani, D. Karam Sarkis, R. Maroun, N. Louka

{"title":"Novel air sterilization process for clean air production and microbial spread limitation using protection devices.","authors":"J. Assaf, Regina Geitani, D. Karam Sarkis, R. Maroun, N. Louka","doi":"10.22453/lsj-022.2.232-241","DOIUrl":"https://doi.org/10.22453/lsj-022.2.232-241","url":null,"abstract":"This work aims to develop and simulate a novel process based on sterilizing natural air by heating at high temperatures followed by rapid cooling. The new sustainable process is called “Air Rapid Heating Rapid Cooling Sterilization” (ARHRCS). Thus, it can be used in Heating, Ventilation, and Air Conditioning (HVAC) systems in hospitals to produce safe air, free of pathogenic airborne microbes including bacteria and viruses such as tuberculosis (TB) and coronavirus (SARS-CoV-2). A crown fixed on the head of the medical staff may be connected to the HVAC system to produce a constant flow of clean laminar air. Hence, this crown is capable of keeping airborne microorganisms at a safe distance from Health Care Workers (HCWs), avoiding any potential microbial infection. Accordingly, HCWs will be able to work in more suitable and safe conditions, especially in high infection risk areas. Depending on its need, the newly developed process may be implemented in different other locations such as laboratories, malls, planes, buildings, and other crowded spaces. Further applications of this method may arise including its usage in the sterilization of recirculated air in biosafety cabinets and the development of a portable air sterilizing unit.","PeriodicalId":31081,"journal":{"name":"Lebanese Science Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47220276","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}

引用次数: 0

Novice Translators’ Troubles and the Need for Innovative Translation Curricula: Lebanese Context. 翻译新手的困境与创新翻译课程的需要:黎巴嫩语境。

Lebanese Science Journal Pub Date : 2022-03-02 DOI: 10.22453/lsj-022.2.242-262

Carla Joseph Abi Hanna

{"title":"Novice Translators’ Troubles and the Need for Innovative Translation Curricula: Lebanese Context.","authors":"Carla Joseph Abi Hanna","doi":"10.22453/lsj-022.2.242-262","DOIUrl":"https://doi.org/10.22453/lsj-022.2.242-262","url":null,"abstract":"This paper provides an overview of the curricula in translation programs at the undergraduate level in Lebanon and the need to update these curricula in alignment with the continuously evolving market. Globalization is very common in both the translation market and the educational sector, especially with the COVID-19 pandemic, which has imposed the need to update these curricula and investigate to which extent the courses offered in some Lebanese universities equip students with what is needed in the changing translation ecosystem, taking into account the new competence-based training trends in the translation market. Surveys and interviews were conducted with students, teachers, and owners of translation companies to shed light on the obstacles novice translators face when they first embark on their professional journey. What does the market expect from novice translators? What is missing in translation curricula? And to what extent does this curriculum answer the needs of the translation changing market? It is found that there is a need for some Lebanese universities to reconsider their curricula, mainly focusing on technology and aligning curriculum content with market needs","PeriodicalId":31081,"journal":{"name":"Lebanese Science Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42382343","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}

引用次数: 0

Factors affecting the attitude toward mobile commerce usage among Lebanese consumers: A conceptual Framework. 影响黎巴嫩消费者对移动商务使用态度的因素:一个概念框架。

Lebanese Science Journal Pub Date : 2022-03-02 DOI: 10.22453/lsj-022.2.263-291

Haifa Bou Khzam, Jean Francois Lemoine

{"title":"Factors affecting the attitude toward mobile commerce usage among Lebanese consumers: A conceptual Framework.","authors":"Haifa Bou Khzam, Jean Francois Lemoine","doi":"10.22453/lsj-022.2.263-291","DOIUrl":"https://doi.org/10.22453/lsj-022.2.263-291","url":null,"abstract":"Mobile commerce is a worldwide innovation. However, in Lebanon, several factors are hindering its development. Therefore, our objective is to find the factors influencing the consumer’s attitude toward the use of mobile commerce and to create a research model reflecting our findings. This research revises the basic theories of technology adoption and studies conducted in m-commerce, e-commerce, and related fields. An exploratory study of deep interviews with 14 consumers and experts was held, and a content analysis by themes was performed to show the consistent variables for our conceptual framework. New derived variables, the situational factor and digital culture tend to moderate the relations between independent and dependent variables. Service availability, self-efficacy and social-influence significantly influence the consumer’s attitude toward the use of m-commerce, while cost is negatively affected. This study has both theoretical and managerial implications, it presents a new research model compared to prior studies in online service technologies, especially in mobile commerce. In addition, results provide online businesses with many trusted recommendations for their strategic plans based on analyzed and accurate data.","PeriodicalId":31081,"journal":{"name":"Lebanese Science Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42038375","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}

引用次数: 2

Role of New Opinion Leaders on Social Media in Political and Religious Polarization (Jordanian case study). 社交媒体上新舆论领袖在政治和宗教两极分化中的作用（约旦案例研究）。

Lebanese Science Journal Pub Date : 2022-02-13 DOI: 10.22453/lsj-021.2.233-251

Lana Kazkaz

{"title":"Role of New Opinion Leaders on Social Media in Political and Religious Polarization (Jordanian case study).","authors":"Lana Kazkaz","doi":"10.22453/lsj-021.2.233-251","DOIUrl":"https://doi.org/10.22453/lsj-021.2.233-251","url":null,"abstract":"Social media brings to the fore new opinion leaders. Due to their supposed role in public debate as well as persuasion and promotion of opinions and new behaviours among users of such networks, they are called Influences. In the last few decades, communication research has explored opinion leaders as effective influences on their environments and societies. They present and interpret information, give opinions and adopt innovation before the audience, in addition to mediating between the audience and media in the communication process. More particularly, Facebook represents a new space for discussion in the Arab World. The phenomenon spread during the Arab Spring in 2011 and even expanded later. It took different forms, like the transfer of information, interpretation of incidents, and mobilization for mass events, political and cultural polarization and new critical discourse. However, what is taking place in cyberspace is still debatable. The present study looks into the new opinion leaders’ phenomenon in the Arab public sphere and their part in political and religious polarization. The discourse of posts on three Facebook accounts of new opinion leaders (Influences) in Jordan is analysed. As these figures play disparate roles in national political and cultural events and dilemmas, lessons can be derived from such a rising phenomenon. The study aims at exploring the discourse features of the posts addressing public issues which sparked widespread controversies in the period 2017-2018, such as the civil state, theocratic state, school curriculum reform and political reform in Jordan. Study has found that the new opinion leaders’ phenomenon on social media in Jordan is on the rise, in terms of political and religious polarization. That would reveal some characteristics and roles of new opinion leaders, in addition to the features of their discourse with reference to major political and religious issues and values as well as political and religious polarization.","PeriodicalId":31081,"journal":{"name":"Lebanese Science Journal","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46809038","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}

引用次数: 0