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Revealing the environmental fate of ciprofloxacin in pharmaceutical effluent through UV/O3 degradation tracked by LC-MS/MS and assessed using a risk-based sustainability framework 通过LC-MS/MS跟踪UV/O3降解并使用基于风险的可持续性框架进行评估,揭示制药废水中环丙沙星的环境命运
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.kjs.2026.100538
Wahyu Zuli Pratiwi , Hadiyanto Hadiyanto , W. Widayat , Azhar Darlan , Yoyon Wahyono
Antibiotic contamination from pharmaceutical industrial effluent poses a growing environmental problem due to the persistence and ecotoxicity of these compounds. This study provides a detailed evaluation of ciprofloxacin, a frequently found antibiotic in Indonesian pharmaceutical effluent, by using a combined method that includes advanced testing techniques, treatment for breaking it down, life cycle analysis, and toxicity predictions about it. Ciprofloxacin was found and measured using a carefully tested liquid chromatography–mass spectrometry/mass spectrometry (LC–MS/MS) method, which used a BEH C18 column and was improved with a water–acetonitrile mixture and 16 eV collision energy. The method exhibited excellent performance with linearity (R2 > 0.999), recovery (98–102 %), a limit of detection (LOD) of 0.29 mg/L, and a limit of quantification (LOQ) of 0.97 mg/L. UV/O3 treatment achieved >90 % ciprofloxacin removal in real pharmaceutical effluent. LCA results revealed a 58 % reduction in eutrophication potential and a 43 % decrease in aquatic toxicity burden, with chemical oxygen demand (COD) and biochemical oxygen demand (BOD) as key impact drivers. Despite the treatment's efficiency, predictive modeling using the Toxicity Estimation Software Tool (T.E.S.T.) indicated that ciprofloxacin remains mutagenic and developmentally toxic, with a low bioaccumulation factor (BCF = 10.95). This study demonstrates that UV/O3 is a useful and eco-friendly method for cleaning effluent containing antibiotics, and it also provides a means to evaluate how new treatments impact the environment. Additionally, the findings highlight the necessity of combining advanced treatments with environmental impact assessments to inform safer waste management strategies in the pharmaceutical industry.
由于这些化合物的持久性和生态毒性,制药工业废水中的抗生素污染造成了日益严重的环境问题。环丙沙星是印度尼西亚制药废水中常见的一种抗生素,本研究通过使用一种综合方法对环丙沙星进行了详细评估,该方法包括先进的检测技术、分解处理、生命周期分析和毒性预测。采用液相色谱-质谱/质谱(LC-MS /MS)方法对环丙沙星进行了发现和测定,该方法使用BEH C18色谱柱,并用水-乙腈混合物和16 eV碰撞能量进行了改进。该方法具有良好的线性关系(R2 > 0.999),回收率(98 ~ 102%),检出限(LOD)为0.29 mg/L,定量限(LOQ)为0.97 mg/L。UV/O3处理对实际制药废水的环丙沙星去除率达到90%。LCA结果显示,富营养化潜势降低58%,水生毒性负担降低43%,其中化学需氧量(COD)和生化需氧量(BOD)是主要影响因素。尽管治疗有效,但使用毒性评估软件工具(T.E.S.T.)的预测模型表明,环丙沙星仍然具有致突变性和发育毒性,生物蓄积因子(BCF = 10.95)较低。这项研究表明,UV/O3是一种有用的、环保的方法,用于清洗含有抗生素的废水,它也提供了一种评估新处理方法如何影响环境的手段。此外,研究结果强调了将先进的处理方法与环境影响评估相结合的必要性,从而为制药业更安全的废物管理战略提供信息。
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引用次数: 0
Subsurface exploration for soil geotechnical properties: Implications for infrastructure design and construction in Victoria Island, Lagos, Nigeria 土壤岩土力学性质的地下勘探:对尼日利亚拉各斯维多利亚岛基础设施设计和建设的影响
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.kjs.2026.100541
Sunday Oladele , Bamidele Ruth Faleye , Joseph Oluwagbeja Simeon
An exploration of subsurface soil properties has been conducted at a proposed construction site in the aquatic city of Lagos, Nigeria, through the integration of geotechnical and geophysical methods. The aim was to characterise the soil properties and assess their implications for the proposed multi-storey infrastructure. Standard Penetration Tests (6), Dutch Cone Penetrometer Tests (14), and dipole-dipole and pole-dipole electrical resistivity imaging were conducted at the site. The topsoil, consisting of sandy lateritic clay (10–5595 Ωm), extends from 0 to 4 m and grades into dense sand at other locations, reaching a depth of 5.50m. The topsoil exhibits high shear strength (≤150 kg/m2), an allowable bearing pressure of 54 kN/m2 to 85 kN/m2, and a safety factor of 2.5. A 3- to 6-m-thick layer of soft, amorphous clay/peaty clay (0–11 Ωm) lies beneath the topsoil. Grey, medium to very dense sand (0–2387 Ωm), containing infrequent gravel, is found beneath this layer down to 30 m depth. Within the peat/peaty clay, zones containing freshwater show high resistivity responses (83–2380 Ωm), whereas clayey sand with saline water exhibits lower resistivity (0–40 Ωm). The total ground-bearing pressure for the proposed structure is estimated at 225 kN/m2. Precast piles reaching 18 m depth, with diameters and safe working loads of 600 mm/1140 kN, 800 mm/2010 kN, or 1000 mm/3150 kN, are recommended for the multi-storey development. This study is novel because it reduces the ambiguity and high cost typically associated with subsurface explorations that preclude the combination of geotechnical and geophysical methods.
在尼日利亚拉各斯市的一个拟建工地,通过综合岩土工程和地球物理方法,对地下土壤特性进行了勘探。目的是描述土壤特性,并评估其对拟议的多层基础设施的影响。在现场进行了标准贯入试验(6)、荷兰锥贯入试验(14)以及偶极-偶极和极-偶极电阻率成像。表层土壤由砂质红土粘土(10-5595 Ωm)组成,从0 ~ 4 m延伸,在其他位置分级为致密砂,深度达到5.5 50m。表层土具有较高的抗剪强度(≤150 kg/m2),允许承受压力为54 kN/m2 ~ 85 kN/m2,安全系数为2.5。表层土下面有一层3- 6米厚的软质无定形粘土/泥炭质粘土(0-11 Ωm)。灰色,中等到非常致密的沙子(0-2387 Ωm),含有罕见的砾石,在30米深的地层下发现。在泥炭/泥炭粘土中,含有淡水的区域表现出高电阻率响应(83-2380 Ωm),而含有咸水的粘土砂则表现出低电阻率(0-40 Ωm)。拟议结构的总地面承受压力估计为225千牛/平方米。建议采用深度为18m的预制桩,桩径为600mm / 1140kn、800mm /2010 kN或1000mm / 3150kn的安全工作荷载。这项研究是新颖的,因为它减少了地下勘探的模糊性和高成本,而地下勘探通常阻碍了岩土工程和地球物理方法的结合。
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引用次数: 0
A stochastic model of alcohol consumption: Stability and global dynamics 酒精消费的随机模型:稳定性和全球动态
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.kjs.2026.100542
Sara Soulaimani , Fathalla A. Rihan , Abdelilah Kaddar
This paper develops a stochastic mathematical model to study the stability and global dynamics of alcohol consumption. The population is divided into four compartments, with transitions described by deterministic differential equations and extended with stochastic perturbations to capture random variability. Stability is analyzed using Lyapunov functions, while a global sensitivity analysis based on partial rank correlation coefficients (PRCC) identifies key parameters driving long-term outcomes. Numerical simulations validate the theory, showing how initiation, relapse, and cessation rates shape system resilience and the effectiveness of intervention strategies. The results reveal how stochastic effects and targeted interventions determine drinking behavior trends.
本文建立了一个随机数学模型来研究酒精消费的稳定性和全局动态。总体被划分为四个区室,用确定性微分方程描述过渡,并用随机扰动扩展以捕获随机变异性。稳定性分析使用李雅普诺夫函数,而基于部分秩相关系数(PRCC)的全局敏感性分析确定了驱动长期结果的关键参数。数值模拟验证了这一理论,显示了开始、复发和戒烟率如何影响系统弹性和干预策略的有效性。结果揭示了随机效应和有针对性的干预是如何决定饮酒行为趋势的。
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引用次数: 0
On the proper enumeration of all finite length strings for source coding 关于源代码编码的所有有限长度字符串的适当枚举
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.kjs.2026.100537
Bella Bose , Luca G. Tallini
In the proper enumeration of the binary words, the sequence is arranged as {X1,X2,X3,X4,X5,X6,X7,X8,X9,}=def{0,1,00,01,10,11,000,001,010,}. Simple methods for finding the index of a given word in this proper enumeration are presented and analyzed. Additionally, methods for determining the corresponding word from a given index in this enumeration are described. These methods are extended to any radix-r word system.
在二进制词的正确枚举中,序列排列为{X1,X2,X3,X4,X5,X6,X7,X8,X9,…}=def{0,1,00,01,10,11,000,001,010,…}。给出并分析了在适当枚举中查找给定单词索引的简单方法。此外,还描述了从此枚举中的给定索引中确定相应单词的方法。这些方法可以扩展到任何基数-r字系统。
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引用次数: 0
Spatio-temporal flood frequency dynamics in Kaziranga National Park using multi-year Sentinel-1 SAR and vegetation indices 基于多年Sentinel-1 SAR和植被指数的卡兹兰加国家公园洪水频率时空动态
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-02-05 DOI: 10.1016/j.kjs.2026.100552
Prasad Balasaheb Wale , Thota Sivasankar , Ratna Sanyal
Floods along the Brahmaputra are frequent, devastating, and dynamic, bringing severe hydrologic, ecological, and geomorphological alterations in Kaziranga National Park (KNP), a UNESCO World Heritage Site. This study presents a spatio-temporal Flood Frequency (FF) assessment and its ecological implications using multi-sensor satellite data. A total of 228 Sentinel-1 Synthetic Aperture Radar (SAR) and 8 Sentinel-2 optical images (2015–2022) were analysed to derive annual FF maps, identify hotspot regions of major FF change, and quantify vegetation response using Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), and Modified NDWI indices. Flood inundation maps were generated through SMILE random forest classification of pre and during-flood SAR composites in Google Earth Engine. Results show typically high FF along the Brahmaputra channel and permanent waterbodies and wetlands, whereas elevated southern highlands exhibited low FF. Extreme flood years (2017, 2020, 2022) recorded mean FF >40%. FF trend analysis revealed 81.72% of KNP remained stable, 10.04% experienced increasing FF linked to erosion and channel encroachment, and 8.24% showed decreasing FF due to deposition. Flood ridges (70% FF) digitized between 2015 and 2022 indicated average channel migration of ∼157 m upstream and ∼311 m inward, with localized shifts exceeding ∼1 km. DBSCAN clustering of FF slopes delineated 68 clusters, comprising 43 hotspots and 25 cold spots, marking zones of hydro-geomorphic instability. Vegetation analysis revealed NDVI decline in hotspots due to inundation and erosion, while cold spots showed greening from sediment deposition and grassland regeneration. The integrated SAR–optical approach underscores dynamic floodplain alterations and ecological responses, providing vital inputs for monitoring riverine ecosystems and strengthening conservation strategies in KNP.
雅鲁藏布江沿线的洪水频繁、破坏性强,给联合国教科文组织世界遗产卡齐兰加国家公园(KNP)带来了严重的水文、生态和地貌变化。本研究利用多传感器卫星数据进行了洪水频率(FF)的时空评估及其生态意义。利用2015-2022年共228幅Sentinel-1合成孔径雷达(SAR)和8幅Sentinel-2光学影像进行分析,得出FF年景图,识别FF主要变化热点区域,并利用归一化植被指数(NDVI)、归一化差水指数(NDWI)和修正NDWI指数量化植被响应。在谷歌Earth Engine中对洪水前和洪水期间的SAR合成物进行SMILE随机森林分类,生成洪水淹没图。结果表明,沿雅鲁藏布江河道和永久水体和湿地的FF值较高,而南部高地的FF值较低。极端洪水年份(2017年、2020年、2022年)记录的平均FF >;40%。FF趋势分析显示,81.72%的KNP保持稳定,10.04%的KNP因侵蚀和河道侵蚀而FF增加,8.24%的KNP因沉积而FF减少。2015年至2022年间数字化的洪脊(70% FF)表明,河道上游平均迁移约157米,向内迁移约311米,局部偏移超过约1公里。对FF坡面进行DBSCAN聚类,共划分出68个聚类,包括43个热点和25个冷点,标志着水文地貌不稳定区。植被分析显示,热点地区NDVI因淹没和侵蚀而下降,而寒带地区则因泥沙淤积和草地更新而变绿。综合sar光学方法强调了河漫滩的动态变化和生态响应,为监测河流生态系统和加强KNP的保护策略提供了重要的输入。
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引用次数: 0
Sustainable fabrication of starch/PVA/CuO electrospun nanoscaffolds from Turbinaria ornata (marine macroalgae) extract: Physicochemical characterization and antidiabetic evaluation 以大藻提取物为原料制备淀粉/PVA/CuO静电纺丝纳米支架:理化性质和抗糖尿病评价
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-01-31 DOI: 10.1016/j.kjs.2026.100545
Martina Ainslay Paul Arul Raj , Suresh Subramaniyam , Sivaramakrishnan R , Gopalakrishnan Velliyur Kanniappan , Selvaraj Jayaraman , Chella Perumal Palanisamy
This study presents an eco-friendly approach for synthesizing copper oxide nanoparticles (CuO NPs) using Turbinaria ornata marine algae extract and their incorporation into starch/polyvinyl alcohol (PVA) electrospun nanofibers for antidiabetic applications. The biosynthesized CuO NPs were characterized using UV–visible spectroscopy, FTIR (Fourier transform infrared spectroscopy), XRD (X-ray diffraction), SEM (scanning electron microscopy), TGA (thermogravimetric analysis), and DLS (dynamic light scattering), confirming their crystalline monoclinic structure (average size: 92.8 nm) and thermal stability. Electrospun starch/PVA/CuO nanoscaffolds exhibited uniform fiber morphology (150–300 nm diameter) with well-dispersed nanoparticles. In vitro antidiabetic assays revealed that the nanocomposite scaffolds demonstrated superior α-amylase (81.52%) and α-glucosidase (81.52%) inhibition at 100 μg/mL, outperforming both algal extract and bare CuO NPs, suggesting enhanced enzyme inhibition. The green synthesis route, coupled with electrospinning, offers a sustainable strategy for developing nanomaterial-based therapeutics for diabetes management. These findings highlight the potential of marine algae-mediated CuO NPs and biodegradable nanofibers as a biocompatible platform for metabolic disorder interventions.
本研究提出了一种生态友好的方法来合成氧化铜纳米粒子(CuO NPs),并将其掺入淀粉/聚乙烯醇(PVA)静电纺纳米纤维中用于抗糖尿病。采用紫外可见光谱、傅里叶红外光谱、x射线衍射、扫描电镜、热重分析和动态光散射等手段对合成的CuO纳米粒子进行了表征,证实了其单斜晶型结构(平均尺寸为92.8 nm)和热稳定性。静电纺丝淀粉/PVA/CuO纳米支架具有均匀的纤维形态(直径150 ~ 300 nm)和分散良好的纳米颗粒。体外抗糖尿病实验表明,纳米复合支架在100 μg/mL时对α-淀粉酶(81.52%)和α-葡萄糖苷酶(81.52%)的抑制作用优于海藻提取物和裸CuO NPs,表明其对酶的抑制作用增强。绿色合成路线,加上静电纺丝,为开发基于纳米材料的糖尿病治疗方法提供了一个可持续的策略。这些发现突出了海洋藻类介导的CuO NPs和可生物降解纳米纤维作为代谢紊乱干预的生物相容性平台的潜力。
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引用次数: 0
Advances in neutron imaging for non-destructive testing: Developing techniques, challenges, and future directions 无损检测中子成像的进展:发展技术、挑战和未来方向
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-01-29 DOI: 10.1016/j.kjs.2026.100546
Muhammad Zubair , Yumna Adel
Neutron radiography is a non-destructive imaging tool that utilizes neutron beams for the investigation of the internal material structures. It offers a unique sensitivity for light elements such as lithium, boron, and most importantly hydrogen. Neutron radiography has evolved past its small accelerator experimental days of the early 1930s into highly advanced studies at large facilities such as research reactors and spallation sources. Neutron radiography facilities currently utilize scintillator-detectors, imaging plates, and high-resolution cameras, along with advanced image-processing techniques, in order to obtain higher spatial resolution and reduced noise. This imaging technique opens the doors for studies across a wide range of industries and applications, such as two-phase flow visualization, energy materials’ studies such as fuel cells and lithium-ion batteries, and analysis of objects of cultural heritage relevance. Modern-day neutron imaging suffers from limitations such as neutron source availability, safety and operational issues, elemental selectivity, and high computational demands for image reconstruction. Despite this, neutron radiography still remains a valuable complementary tool to conventional x-ray imaging, as it provides insights into structures and processes that are otherwise difficult to visualize. This review paper summarizes the evolution, advantages, and limitations of neutron radiography while also highlighting the many applications it has across multiple fields. It aims to consolidate recent advances while also providing a forward-looking perspective on the role of neutron imaging in the radiography field as well as a complementary imaging tool.
中子射线照相是一种利用中子束对材料内部结构进行研究的非破坏性成像工具。它对锂、硼、最重要的是氢等轻元素具有独特的灵敏度。中子射线照相技术已经从20世纪30年代早期的小型加速器实验发展到在大型设施(如研究反应堆和散裂源)进行高度先进的研究。中子射线照相设备目前利用闪烁探测器、成像板和高分辨率相机,以及先进的图像处理技术,以获得更高的空间分辨率和降低噪音。这种成像技术为广泛的行业和应用研究打开了大门,例如两相流可视化,能源材料的研究,如燃料电池和锂离子电池,以及与文化遗产相关的物品分析。现代中子成像受到中子源可用性、安全性和操作问题、元素选择性以及图像重建的高计算需求等限制。尽管如此,中子射线照相仍然是传统x射线成像的一个有价值的补充工具,因为它可以深入了解难以可视化的结构和过程。本文综述了中子射线照相技术的发展、优点和局限性,并重点介绍了它在多个领域的应用。它旨在巩固最近的进展,同时也为中子成像在放射照相领域的作用以及补充成像工具提供前瞻性的视角。
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引用次数: 0
Phytochemical composition and larvicidal activities of Artemisia herba-alba, Thymus numidicus and Citrus limon peel essential oils on the pine processionary moth 白蒿、胸腺草和柠檬皮精油对松林行军蛾的植物化学成分及杀幼虫活性研究
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.kjs.2026.100540
Ibtissem Boudjahem , Noureddine Soltani , Fathi Berrabah , Imededdine Kadi , Mouslim Bara , Seyf Eddine Merzoug , Amel Aouati
The pine processionary moth (PPM) (Thaumetopoea pityocampa, Denis and Schiffer-Müller 1775, Lepidoptera: Notodontidae) is one of the most dangerous pests of pine and cedar in the Mediterranean forest area. During feeding on fresh needles, larvae participate in weakening trees ecological quality, making them more vulnerable to environmental stress. Large infestations can lead to significant defoliations, and even to the decline of the entire forest. In the present study, a variety of three essential oils (EOs) (Artemisia herba-alba, Thymus numidicus, and Citrus limon), belonging to diverse botanical families, have been evaluated on the 2nd, 3rd and 4th moth larval stages. The toxicological effect was estimated under controlled conditions at 24, 48, 72, and 96 h. Results showed that EOs yields ranged between 2.17 % for T. numidicus, 1.32 % for A. herba-alba, and 1.02 % for C. limon. The major chemical components identified using GC-MS protocol were thymol (27.68 %) and carvacrol (16.37 %) for T. numidicus, camphor (28.56 %) and β-thujone (20.60 %) for A. herba-alba, and limonene (51.28 %) and o-cymene (27.99 %) for C. limon. Mortality gradually increased with concentration and prolonged exposure duration. The highest mortality rates were observed in the 2nd and 3rd larval instars with T. numidicus (95 % and 62 %) and A. herba-alba (70 % and 72.5 %) EOs, compared to C. limon EO, which showed a moderate effect (50 % and 42.5 %) after 96 h at the highest concentration (1 %). This study pointed out that T. numidicus EO, rich in phenolic compounds (thymol and carvacrol), exhibited higher insecticidal potency against PPM larvae. Further exploration of its impact on PPM and other lepidopteran pests should include field trials and the development of suitable formulations that ensure stability and prolonged activity under natural conditions.
松行蛾(Thaumetopoea pityocampa, Denis and schiffer - m 1775,鳞翅目:齿齿蛾科)是地中海林区松树和雪松最危险的害虫之一。在以新鲜针叶为食的过程中,幼虫参与削弱树木的生态质量,使其更容易受到环境压力的影响。大规模的虫害会导致大量的落叶,甚至导致整个森林的衰落。本研究对不同植物科的三种精油(Artemisia herba-alba, thyymus numidicus和Citrus limon)在2、3和4月蛾幼虫期进行了鉴定。结果表明,在24、48、72和96 h的控制条件下,绿腹田鼠的产率为2.17%,白草田鼠为1.32%,柠檬田鼠为1.02%。气相色谱-质谱法鉴定的主要化学成分为:野田鼠的百里香酚(27.68%)和香芹酚(16.37%),白田鼠的樟脑(28.56%)和β-图琼酮(20.60%),柠檬草的柠檬烯(51.28%)和o-花仙花烯(27.99%)。死亡率随着浓度和暴露时间的延长而逐渐增加。对2龄和3龄幼虫,最高浓度为1%时,褐皮姬鼠(95%和62%)和草白姬鼠(70%和72.5%)的死亡率最高,96 h后对柠檬姬鼠(50%和42.5%)的效果中等。本研究指出,黄颡鱼含有丰富的酚类化合物(百里香酚和香芹酚),对PPM幼虫具有较高的杀虫效力。进一步探索其对PPM和其他鳞翅目害虫的影响应包括实地试验和开发适当的配方,以确保在自然条件下的稳定性和长期活性。
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引用次数: 0
Advanced multimodal biometric authentication for IoT-enabled smart home security: Integrating deep learning-based face recognition with behavioral patterns 面向物联网智能家居安全的先进多模态生物识别认证:将基于深度学习的人脸识别与行为模式相结合
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-01-30 DOI: 10.1016/j.kjs.2026.100548
Khalid Alkanan, Yanru Zhong, Xiaonan Luo, Rongsheng Dong
This research proposed an advanced multimodal biometric authentication system for IoT-enabled smart home security. The security issues related to IoT-enabled smart home devices include, but are not limited to, unauthorized access, the risk of biometric spoofing, and reliability problems with single-modal authentication when illumination levels, user pose or position, or viewing conditions differ. The system integrates deep learning-based face recognition and gait analysis using the CASIA-B dataset. A convolutional neural network (CNN) model is employed for face recognition, while a gait energy image (GEI) is utilized for gait analysis. A novel weighted multimodal fusion approach is developed to combine results from both modalities, balancing their inputs to enhance authentication accuracy. Experiments demonstrate robust performance across various viewing angles, achieving average accuracies of 88 % for face recognition and 89 % for gait analysis. The integrated model outperforms individual modalities, achieving an overall accuracy of 92 %, highlighting the potential of multimodal systems to improve biometric security in smart homes. The implications of this study are significant for the future of residential security systems. By demonstrating the effectiveness of combining multiple biometric modalities, this research paves the way for more secure and user-friendly smart home access control systems, potentially reducing unauthorized access attempts and enhancing overall home safety in the internet of things (IoT) era.
本研究提出了一种先进的多模态生物识别认证系统,用于物联网智能家居安全。与支持物联网的智能家居设备相关的安全问题包括但不限于未经授权的访问、生物识别欺骗的风险,以及当照明水平、用户姿势或位置或观看条件不同时单模态认证的可靠性问题。该系统使用CASIA-B数据集集成了基于深度学习的人脸识别和步态分析。采用卷积神经网络(CNN)模型进行人脸识别,步态能量图像(GEI)进行步态分析。提出了一种新的加权多模态融合方法,将两种模态的结果结合起来,平衡它们的输入以提高认证精度。实验表明,该系统在不同视角下都具有良好的性能,面部识别的平均准确率为88%,步态分析的平均准确率为89%。集成模型优于单个模式,总体准确率达到92%,突出了多模式系统在提高智能家居生物识别安全性方面的潜力。本研究对住宅安全系统的未来具有重要意义。通过展示多种生物识别模式相结合的有效性,本研究为更安全、用户友好的智能家居门禁系统铺平了道路,有可能减少未经授权的访问企图,并增强物联网(IoT)时代的整体家庭安全。
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引用次数: 0
Comparative analysis of the withdrawal of thin-film flow of a third-grade fluid under the influence of MHD using two homotopy based techniques 用两种基于同伦的技术对比分析MHD影响下三级流体薄膜流动的撤回
IF 1.1 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES Pub Date : 2026-04-01 Epub Date: 2026-02-04 DOI: 10.1016/j.kjs.2026.100551
Azzh Saad Alshehry , Musaad S. Aldhabani , Alamgeer Khan , Ahmed Shafee
The purpose of this work is to examine the thin film flow of a third grade fluid having appropriate boundary conditions using two homotopy based techniques, that is, the optimal homotopy asymptotic method with DJ polynomial (OHAM-DJ) and the asymptotic homotopy perturbation method (AHPM), where the belt is considered to be moving vertically. The novelty of this research lies in the comparative application of two perturbation methods to the same flow problem, which not only validates the results but also highlights the efficiency and accuracy of each technique. The governing equations are reduced to ordinary differential equations (ODEs). The influences of important dimensionless parameters such as the magnetic parameter M, the non-Newtonian parameter β, and the Stokes number st on the velocity profile and flow behavior are carefully investigated. Solutions are given in the form of graphs and tables, illuminating a strong agreement between both methods. This work finds that increasing the magnetic parameter slows down the fluid motion because of Lorentz force, whereas higher non-Newtonian parameter and the Stokes number significantly alter the velocity. This dual-technique methodology ensures solution robustness and gives deeper understanding into the complex rheology of third-grade fluid flows in practical applications. The proposed methods are compared with the optimal auxiliary functions method (OAFM), and it is found that both these techniques yield better results than OAFM.
本文的目的是利用两种基于同伦的技术,即具有DJ多项式的最优同伦渐近方法(OHAM-DJ)和渐近同伦摄动方法(AHPM)来研究具有适当边界条件的三级流体的薄膜流动,其中带被认为是垂直运动的。本研究的新颖之处在于将两种摄动方法应用于同一流动问题的比较,不仅验证了结果,而且突出了每种技术的效率和准确性。控制方程化为常微分方程(ode)。研究了磁性参数M、非牛顿参数β和斯托克斯数st等重要无量纲参数对速度分布和流动特性的影响。解以图表的形式给出,说明了两种方法之间的强烈一致性。本研究发现,由于洛伦兹力的作用,增大磁参数会减慢流体的运动,而增大非牛顿参数和斯托克斯数则会显著改变流体的速度。这种双重技术方法确保了溶液的稳健性,并在实际应用中对三级流体流动的复杂流变学有了更深入的了解。将所提出的方法与最优辅助函数法(OAFM)进行了比较,发现这两种方法都比最优辅助函数法(OAFM)取得了更好的结果。
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