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Error in the Technological Resources Used for Mathematics Education 数学教育所用技术资源的误差
Pub Date : 2023-11-20 DOI: 10.57184/msj.v12i2.33
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引用次数: 0
Adopting Digital Solutions for Large Scale Surveillance of Crop Pests and Diseases in Developing Countries—A Review 发展中国家采用数字解决方案大规模监测作物病虫害--综述
Pub Date : 2023-11-20 DOI: 10.57184/msj.v12i2.32
G. Ouma, Paul Okanda, F. Awuor, C. Ratemo, Makiya
Crop pests and diseases are ranked as some of the world’s leading threats to agricultural productivity. The need to improve adoption of digital solutions prompted a review on the applicability of emerging digital solutions in large-scale surveillance of crop pest and diseases. This study presents findings on key requirements for achieving digitized large-scale pest surveillance, fitness for purpose of common autonomous biosecurity surveillance technologies, and prospects of smartphones as an alternative surveillance solution. Firstly, the research identified appropriateness of the solution, availability of supporting infrastructure and level of stakeholder involvement in solution formulation as some of the key determinants of digital solution adoption. Although most common autonomous biosecurity surveillance technologies are promising, their adoption in developing nations are limited by operational costs, legal requirements, skillsets, and operational environments among others. Thirdly, recent advancements in smartphones and wide spread ownership among farmers provide a unique opportunity for advancing Mobile Crowd-Sensing solutions in achieving large-scale pest surveillance. Lastly, we recommend designing an incentive mechanism to motivate farmers’ participation in a surveillance solution.
农作物病虫害被列为全球农业生产力的主要威胁之一。由于需要提高数字解决方案的采用率,因此对新兴数字解决方案在大规模农作物病虫害监测中的适用性进行了审查。本研究介绍了实现大规模病虫害数字化监控的关键要求、常见自主生物安全监控技术的适用性以及智能手机作为替代监控解决方案的前景。首先,研究发现,解决方案的适当性、支持性基础设施的可用性以及利益相关者参与解决方案制定的程度是采用数字化解决方案的一些关键决定因素。虽然大多数常见的自主生物安全监控技术前景广阔,但在发展中国家的应用受到运营成本、法律要求、技能组合和运营环境等因素的限制。第三,智能手机的最新进展和农民的广泛拥有为推进移动群感解决方案以实现大规模害虫监测提供了一个独特的机会。最后,我们建议设计一种激励机制,鼓励农民参与监测解决方案。
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引用次数: 0
Submarine Accumulations of Methane Hydrates in Adjacences of Marambio Island (Seymour Island), Antarctica and Its Probable Environmental Incident 南极洲马兰比奥岛(西摩尔岛)附近海底甲烷水合物的积累及其可能的环境事件
Pub Date : 2023-11-20 DOI: 10.57184/msj.v12i2.35
Alvaro Sánchez Granel, R. A. D. Valle, Argentine Antarctic Institute
The presence of aliphatic hydrocarbons in sediments at the bottom of the platform and the continental margin of the northeastern tip of the Antarctic Peninsula and its natural escapes, leads us to infer about the likely effects they may have on the Antarctic environment, particularly on changes off average in surface temperatures and seawater. Methane leaks recorded in shallow waters of the region are compatible with the destabilization of gas hydrates in the marine substrate and with changes in average surface temperatures and seawater, suggesting a probable environmental impact such as a consequence of this process, based on the hypothesis of the “clathrate rifle”, the scientific theory of Gerry Dickens and James Kennet, which argues that the rise in sea temperature can lead to a sudden release of methane from the clathrate deposits located in the ocean bottoms, as happened in the Eocene.
南极半岛东北端平台底部和大陆边缘沉积物中存在的脂肪族碳氢化合物及其自然泄漏,使我们能够推断出它们对南极环境可能产生的影响,特别是对表面温度和海水平均温度的变化可能产生的影响。该地区浅水区记录到的甲烷泄漏与海洋底层气体水合物的不稳定性以及地表平均温度和海水的变化相吻合,表明这一过程可能会对环境造成影响,例如根据格里-狄更斯和詹姆斯-肯内特的科学理论 "凝块步枪 "的假设,海温升高会导致位于洋底的凝块沉积物中甲烷的突然释放,就像始新世发生的那样。
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引用次数: 0
Electronic Structure and Forbidden Energy in AlAs Crystalline Alloy AlAs 晶体合金中的电子结构和禁能
Pub Date : 2023-11-20 DOI: 10.57184/msj.v12i2.36
César Cabrera, Salvador A. Trujillo, German E. Pomachagua
We present the energy bands and the DOS, the forbidden energy and total energy of the crystalline compound of AlAs, calculated with the LMTO orbital method within the framework of density functional theory (DFT). Se solved the Schrödinger equation with a potential in the local density approximation (LDA) that uses the Barh-Hedin approximation for the term exchange and correlation. Potential calculated with a small homogeneous fraction of electron charge in the empty spheres and an electronic charge similar to that of the free atom in the atomic spheres of the crystal lattice. The structure of the energy bands presented an indirect forbidden energy gap of 0.160Ry or 2.18 eV with a minimum total energy of -18.10 Ry that fit well with the experimental results
我们介绍了在密度泛函理论(DFT)框架内用 LMTO 轨道法计算的 AlAs 晶体化合物的能带和 DOS、禁能和总能。Se 利用局部密度近似(LDA)中的电位求解了薛定谔方程,该近似使用巴赫-海丁近似来计算交换和相关项。计算时,空球中的电子电荷只占很小的均质部分,而晶格原子球中的电子电荷与自由原子的电子电荷相似。能带结构呈现出 0.160Ry 或 2.18 eV 的间接禁止能隙,最小总能量为 -18.10 Ry,与实验结果非常吻合。
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引用次数: 0
Saccharomyces exiguus Uses Kerosene as a Source of Carbon and Energy 酿酒酵母使用煤油作为碳和能源的来源
Pub Date : 2023-03-15 DOI: 10.57184/msj.v12i1.22
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引用次数: 0
The Idea of a Probability Model for a Population 总体概率模型的思想
Pub Date : 2023-03-15 DOI: 10.57184/msj.v12i1.21
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引用次数: 0
Generation of Two-Dimensional Structured Meshes for Simply and Doubly Connected Regions 单连通和双连通区域二维结构网格的生成
Pub Date : 2023-03-15 DOI: 10.57184/msj.v12i1.23
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引用次数: 0
Implementation of Petri Nets in the Analysis of Pipeline Accidents Petri网在管道事故分析中的应用
Pub Date : 2023-03-15 DOI: 10.57184/msj.v12i1.27
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引用次数: 0
AC and DC House Wiring Efficiency Estimations Using a Fast Extensive Measurements Approach 用快速扩展测量方法估算交直流住宅布线效率
Pub Date : 2023-03-15 DOI: 10.57184/msj.v12i1.26
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引用次数: 0
Theory of Volcanic Energy (Expanded English Edition) 火山能量理论(扩充英文版)
Pub Date : 2023-03-15 DOI: 10.57184/msj.v12i1.28
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引用次数: 0
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