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Multifunctional MXene/Carbon Nanotube Janus Film for Electromagnetic Shielding and Infrared Shielding/Detection in Harsh Environments

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Nano-Micro Letters 2024年第10期16卷 543-560页

作者： Tufail Hassan Aamir Iqbal Byungkwon Yoo Jun Young Jo Nilufer Cakmakci shabbir madad naqvi Hyerim Kim Sungmin Jung Noushad Hussain Ujala Zafar Soo Yeong Cho Seunghwan Jeong Jaewoo Kim Jung Min Oh Sangwoon Park Youngjin Jeong Chong Min Koo School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea Department of Materials Science and Engineering Soongsil UniversitySeoul 06978Republic of Korea Institute of Advanced Composite Materials Korea Institute of Science and Technology92 Chudong-roBongdong-eupWanju-gunJeollabuk-do 55324Republic of Korea R&D Center INNOMXENE Co. Ltd.Daejeon 34365Republic of Korea School of Chemical Engineering Sungkyunkwan UniversitySeobu-ro 2066Jangan-guSuwon-siGyeonggi-do 16419Republic of Korea

Multifunctional,flexible,and robust thin films capable of operating in demanding harsh temperature environments are crucial for various cutting-edge *** study presents a multifunctional Janus film integrating highly-crystalline Ti_(3)C_(2)T_(x) MXene and mechanically-robust carbon nanotube(CNT)film through strong hydrogen *** hybrid film not only exhibits high electrical conductivity(4250 S cm^(-1)),but also demonstrates robust mechanical strength and durability in both extremely low and high temperature environments,showing exceptional resistance to thermal *** hybrid Janus film of 15μm thickness reveals remarkable multifunctionality,including efficient electromagnetic shielding effectiveness of 72 dB in X band frequency range,excellent infrared(IR)shielding capability with an average emissivity of 0.09(a minimal value of 0.02),superior thermal camouflage performance over a wide temperature range(−1 to 300℃)achieving a notable reduction in the radiated temperature by 243℃ against a background temperature of 300℃,and outstanding IR detection capability characterized by a 44%increase in resistance when exposed to 250 W IR *** multifunctional MXene/CNT Janus film offers a feasible solution for electromagnetic shielding and IR shielding/detection under challenging conditions.

关键词： MXene/carbon nanotube Janus film Electromagnetic interference shielding Infrared shielding Thermal camouflage Infrared detection

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An Analogy of Clifford Decomposition Theorem for Abel-Grassmann Groupoids

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Algebra Colloquium 2014年第2期21卷 347-353页

作者： madad Khan Saima Anis Department of Mathematics COMSATS Institute of Information Technology Abbottabad Pakistan

Let S be an inverse AG-groupoid （Abel-Grassmann groupoid） and define a relation γ on S by aγb if and only if there exist some positive integers n and m such that bm∈ （Sa）S and an∈ （Sb）S. We prove that S/γ is a maximal semilattice homomorphic image of S. Thus, every inverse AG-groupoid S is uniquely expressible as a semilattice Y of some Archimedean inverse AG-groupoids Sα （α∈ Y）. Our result can be regarded as an analogy of the well known Clifford theorem in semigroups for AG-groupoids.

关键词： inverse AG**-groupoid invertive law medial law

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On Semilattice Decomposition of an Abel–Grassmann’s Groupoid

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Acta Mathematica Sinica,English Series 2012年第7期28卷 1461-1468页

作者： madad KHAN Saima ANIS Department of Mathematics COMSATS Institute of Information Technology

In this paper, we have decomposed an AG-groupoid. Let S be an AG-groupoid with left identity and a relation γ be defined on S as： aγb if and only if there exist positive integers m and n such that b^m∈E （Sa）S and a^n ∈ （Sb）S for all a and b in S. We have proved that S/γ is a maximal separative Semilattice homomorphic image of S. Every AG-groupoid S is uniquely expressible as a semilattice Y of archimedean AG-groupoids Sa （a∈ Y）. The semilattice Y is isomorphic to S/γ and the Sγ （a ∈ Y） are the equivalence classes of S mod V.

关键词： AG-groupoid invertive law medial law congruence

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Dependence of effective screening length in granular columns on bead and silo sizes and their ratio

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Chinese Physics B 2013年第5期22卷 591-594页

作者： Abdul Qadir madad Ali Shah Saeed Ahmed Khan Department of Electrical Engineering Sukkur Institute of Business Administration

Apparent mass measurements at the bottom of silos have been carried out. An important parameter in the Janssen model known as the effective screening length has been investigated for different bead and silo diameters as well as of their ratios. It is found that the effective screening length augments with the grain diameter d in addition to the granular column size. It is also revealed that λ exhibits stronger correlation with the bead diameter than that of the silo. This phenomenon is attributed to the reduced-shielding of the vertical stresses to the horizontal ones.

关键词： granular systems granular solids static sand piles granular compaction

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A Novel Method to Identify the Global Sources and Sinks of Carbon Dioxide Based on Spatial Analysis

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Journal of Geographic Information System 2015年第2期7卷 110-118页

作者： Ali madad Babak Naimi Saeidi Anjileh Mehdi Department of Environment and Energy Faculty of Science and Research Branch of Islamic Azad University Tehran Iran Department of GIS/SDI National Cartography Center of Iran Tehran Iran

Today global warming has become one of the most important concerns of environmental science. The redundancy of greenhouse gases in the atmosphere is known as a major factor in this phenomenon. These gases contain water vapor, carbon dioxide, methane, nitrous oxide, and ozone. The CO2?gas is one of their most effective among these gases. According to scientific warnings, the amount of CO2?gases in the atmosphere has increased by 40% to 45% over the last 50 years. Reducing the abundant gas in the atmosphere requires a good knowledge of related factors involved, including sources that emit gases into the atmosphere and sinks that absorb the gas from the atmosphere. The amount of CO2?gas in the atmosphere has been accurately measured in previous years with great certainty. But the predicted values of emissions from sources and removals by sinks have large ambiguities. As studies show, even the computed residuals trends (which is obtained by subtracting the amounts of sinks from sources) strongly disagree with the trends of the existence of CO2?in the atmosphere. This study as a preliminary review, proposes a method to identify the locations of sources and sinks of carbon dioxide using global statistical information and adding spatial analysis approaches. By applying this method to the data observed from 2000 to 2011 and the extraction of likely sources and sinks, the region of the Black Sea, near Romania recognized as one of the strong points issued and Bukit Kototabang near Indonesia acknowledged as an Impressive CO2?absorption zone.

关键词： Carbon Dioxide Sink Spatial Autocorrelation Interpolation Volcanic Shape

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The Necessity of Using Cloud Computing in Monitoring Metropolitan Performance<br/>-Case Study: Tehran Metropolitan Urban Observatory

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Journal of Geographic Information System 2013年第6期5卷 521-530页

作者： Ali madad Ali Reza Gharagozlou Ali Reza Vafaei Nejad Department of GIS/RS College of Environment and Energy Tehran Science and Research Branch Islamic Azad University Tehran Iran

Due to the metropolitan area of immense diversity and breadth of their construction activities, the performance of activities at districts level, cannot be precisely evaluated. Therefore, generally, it monitors only the indices which are defined for those functions. Furthermore, district-based development policy, and decentralization of governance, necessitate more local autonomy, which requires closer monitors of districts for being sure of its movements in the frame of urban developing plans. The advancement of technology has created the expectation that we can monitor all details of the metropolitan administrative processes and involve them in decision support systems for urban management. In this study, a web based SDSS prototype has been implemented to monitor the Tehran development plans progress at districts level. This interactive system presents a map of Tehran which indicates the realization of each component of the city master plan in different parts of town. The design of system lets all districts produce and support their own reporting maps, and it presents them in their dedicated place of city map by snapping all districts reports, when a city report arises. Also it elaborates the problem of implementing and proposes “cloud computing facilities” as a solution.

关键词： Metropolitan Management Urban Observatory SDSS OGC Web GIS Cloud Computing

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How to Implement a Governmental Open Source Geoportal

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Journal of Geographic Information System 2014年第4期6卷 275-285页

作者： Saeidi Anjileh Mehdi madad Ali Ghasemlou Nima Rezaie Zahra Saeidi Reyhaneh Baktash Peyman Department of GIS/SDI National Cartography Center of Iran Tehran Iran

By emerging the OGC web services technologies which caused server interoperability in geospatial fields, a rush toward implementing geoweb services commenced among most governmental enterprises. The massive geospatial information which has been produced in various offices during previous years, and which was not available for public customers because of protocol difficulties, now had a chance to be restructured as OGC specifications and be reachable to huge amount of keen clients via Internet platform. Increasing number of map presenters in web environment raised a search facility requirement in spatial data area. These kinds of search abilities are called “Geoportal”, which provides client applications that use several geo services such as catalogs and web map services. How to implement a suitable geoportal to meet the needs, has brought a set of hard challenges for governmental geospatial owners. In this study we present an overall concept of service oriented architecture and its consequence web service specifications and eventually web catalog services which are fundamentals of developing a geoportal. It also declares some experiments on importing/exporting data between geoportals, which is known as harvesting method.

关键词： Catalog Services GIS Portal Geo Network Catalog Harvesting Interoperability

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Spatial Analysis Approach in Revealing the Global Sinks of Atmosphere Carbon Dioxide through “Leave One Out” Method

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Journal of Geographic Information System 2014年第4期6卷 286-297页

作者： Ali madad Mossayeb Jamshid Ali Reza Gharagozlou Ali Reza Vafaei Nejad Ali Javidane Hamid Reza Ranjbar Department of Environment and Energy Science and Research Branch Islamic Azad University Tehran Iran Department of GIS/RS Science and Research Branch Islamic Azad University Tehran Iran Department of Science/Florida Southern College Lakeland Florida USA Faculty of Civil and Passive Defense Malek Ashtar University of Technology Tehran Iran Surveying and Geomatics Group Engineering Faculty Tehran University Tehran Iran Surveying Department National Cartographic Center Tehran Iran

Global warming and climate change are the most important ecological issues of our time. The most well-known factor in this phenomenon is the redundancy of carbon dioxide in the atmosphere. Over the past 50 years the amount of residual CO2 in the atmosphere has risen from 40% to 45%. Reducing CO2 redundancy requires precise knowledge of the gas sources and sinks throughout the atmosphere. Despite having a leading role in residual gas levels of atmosphere, the diagnosis and types of changes of absorbing carbon dioxide are very much in doubt. Atmospheric measurements of CO2 concentrations are highly precise and provide a reliable measure of increase of CO2 in the atmosphere every year but they do not lead to the location of sources and sinks. Studies about understanding CO2 cycles began mainly around 1990 and most of these studies have been focused on non-spatial analysis. By ignoring the spatial effects, an important property such as closeness (adjacent) has been disregarded. The emission sources of gas are stronger than their sink sources i.e., whenever a sink is adjacent to a strong emission source, the measurements will show a massive existence of CO2 gas in that region although there exists a fine CO2?gas sink at below. Using the global measurements of CO2 and applying spatial analysis approach to “Leave One Out” method, our studies reveal the most probable spots of CO2 sources and sinks and that Negev Desert in Middle East is a distinguished CO2 sink region.

关键词： Carbon Dioxide Sink Spatial Autocorrelation Interpolation Jackknife Negev Desert

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边境围栏影响帕米尔高原马可波罗盘羊的跨境迁移

边境围栏影响帕米尔高原马可波罗盘羊的跨境迁移

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第十六届全国野生动物生态与资源保护学术研讨会

作者：卓莹莹汪沐阳刘忠军徐文轩 Abdulnazarov Abdulnazar Ali madad Rajabi Askar Davletbakov Jibran Haider Muhammad Zafar Khan Nabiev Loik Sorosh Poya Faryabi Stefan Michel Stephane Ostrowski Zalmai Moheb Kathreen Ruckstuhl Anto?nio Alves da Silva Joana Alves 杨维康中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室干旱区生态安全与可持续发展重点实验室中国-塔吉克斯坦生物资源保护与利用联合实验室中国科学院新疆生态与地理研究所生物标本馆中国科学院新疆生态与地理研究所木垒野生动物生态监测实验站中国科学院大学新疆维吾尔自治区林业和草原局世界自然保护联盟(IUCN) 加拿大卡尔加里大学葡萄牙科英布拉大学

边境围栏严重阻碍了大型哺乳动物的跨境迁移,中亚是边境围栏建设最密集的区域之一。马可波罗盘羊(Ovis ammon polii)是帕米尔地区的旗舰物种,近年来由于其五个分布国之间的边界围栏不断增加,该物种的跨境迁移受到威胁。本研究通过建立... 详细信息

边境围栏严重阻碍了大型哺乳动物的跨境迁移,中亚是边境围栏建设最密集的区域之一。马可波罗盘羊(Ovis ammon polii)是帕米尔地区的旗舰物种,近年来由于其五个分布国之间的边界围栏不断增加,该物种的跨境迁移受到威胁。本研究通过建立集合物种分布模型发现塔吉克斯坦东部拥有最大的马可波罗盘羊适宜生境(约占总适宜生境的42%),其次是中国(约32%)。采用最小成本路径方法确定了51条生态廊道,其中包括5条跨境生态廊道,这些生态廊道对维持各国国内和跨境核心生境斑块之间的连通性具有重要意义。受地形影响,在过于陡峭的区域无法建设围栏,因此边境围栏存在一些"缺口",它们可以被盘羊利用穿越边境,被定义为自然通道。为量化评估边境围栏的潜在影响,基于马可波罗盘羊坡度选择偏好和围栏建设,本研究评估了情景30、情景40、情景50和情景60四种情景,分别对应围栏建设的坡度上限为30°,40°,50°和60°。在最悲观的情景60中,沿着边界围栏只发现了25条自然通道,而在最乐观的情景(情景30)中则发现了997条,这表明高强度的边界围栏建设将对马可波罗盘羊的跨境迁移具有强烈的负面影响。我们建议通过跨国合作,建立跨境自然保护区,降低边境围栏对马可波罗盘羊等大型哺乳动物的跨境迁移的影响,加强各国马可波罗盘羊种群的连通性,有助于该物种的持续生存。本研究也为其他跨境地区的大型迁徙哺乳动物的保护管理提供宝贵经验。

关键词：帕米尔高原边界围栏自然通道迁徙通道跨国保护

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