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Computer Modeling in Engineering & sciences 2021年第7期128卷 21-41页

作者： I.G.Ameen N.A.Elkot M.A.Zaky a.s.hendy E.H.Doha Department of Mathematics Faculty of ScienceAl-Azhar UniversityCairoEgypt Department of Mathematics Faculty of ScienceCairo UniversityGiza12613Egypt Department of Applied Mathematics Physics DivisionNational Research CentreDokkiCairo12622Egypt Department of Computational Mathematics and Computer science Institute of Natural Sciences and MathematicsUral Federal UniversityYekaterinburg620002Russia Department of Mathematics Faculty of ScienceBenha UniversityBenha13511Egypt

We target here to solve numerically a class of nonlinear fractional two-point boundary value problems involving left-and right-sided fractional *** main ingredient of the proposed method is to recast the problem into an equivalent system of weakly singular integral ***,a Legendre-based spectral collocation method is developed for solving the transformed ***,we can make good use of the advantages of the Gauss quadrature *** present the construction and analysis of the collocation *** results can be indirectly applied to solve fractional optimal control problems by considering the corresponding Euler–Lagrange *** numerical examples are given to confirm the convergence analysis and robustness of the scheme.

关键词： spectral collocation method weakly singular integral equations two-point boundary value problems convergence analysis

Unscented Kalman filter for a low-cost GNss/IMU-based mobile mapping application under demanding conditions

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Geodesy and Geodynamics 2024年第2期15卷 166-176页

作者： Mokhamad Nur Cahyadi Tahiyatul Asfihani hendy Fitrian suhandri Risa Erfianti Department of Geomatics Engineering Institut Teknologi Sepuluh NopemberSurabaya 6011Indonesia Research Center of Marine and Earth science Technology Directorate of Research and Community ServiceInstitut Teknologi Sepuluh NopemberSurabaya 60111Indonesia Department of Mathematics Institut Teknologi Sepuluh NopemberSurabaya 60111Indonesia Centre of studies for surveying science&Geomatics Universiti Teknologi Mara(UiTM)Shah Alam 40450Malaysia

For the last two decades,low-cost Global Navigation satellite system(GNss)receivers have been used in various *** receivers are mini-size,less expensive than geodetic-grade receivers,and in high *** of these outstanding features,low-cost GNss receivers are potentially poorer hardwares with internal signal processing,resulting in lower *** typically come with low-cost GNss antenna that has lower performance than their counterparts,particularly for multipath ***,this research evaluated the low-cost GNss device performance using a high-rate kinematic *** this purpose,these receivers were assembled with an Inertial Measurement Unit(IMU)sensor,which actively transmited data on acceleration and orientation rate during the *** position and navigation parameter data were obtained from the IMU readings,even without GNss signals via the U-blox F9R GNss/IMU device mounted on a *** research was conducted in an area with demanding conditions,such as an open sky area,an urban environment,and a shopping mall basement,to examine the device’s *** data were processed by two approaches:the single Point Positioning-IMU(sPP/IMU)and the Differential GNss-IMU(DGNss/IMU).The Unscented Kalman Filter(UKF)was selected as a filtering algorithm due to its excellent performance in handling nonlinear system *** result showed that integrating GNss/IMU in sPP processing mode could increase the accuracy in eastward and northward components up to 68.28%and 66.64%.Integration of DGNss/IMU increased the accuracy in eastward and northward components to 93.02%and 93.03%compared to the positioning of standalone *** addition,the positioning accuracy can be improved by reducing the IMU noise using low-pass and high-pass *** application could still not gain the expected position accuracy under signal outage conditions.

关键词： LoW-cost GNss GNss/IMU single Point Positioning-IMU(sPP/IMU) Differential GNss-IMU(DGNss/IMU) Unscented Kalman Filter(UKF) Outageconditions

A Hidden Gem Called Changdao Breathtaking scenery and the islanders’commitment to sustainable living

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China Report AsEAN 2024年第1期9卷 60-61页

作者： hendy Yuniarto Indonesian lecturer at Beijing Foreign studies University

Changdao Island,a hidden gem in east China’s shandong Province,features breathtaking *** the sun cuddles the horizon,the island’s azure sky provides a flawless backdrop to an exquisite *** cliffs carved by centuries of endless waves stand guard along the shoreline,their rocky silhouettes seemingly frozen in time,summoning ancient *** this dramatic backdrop,flocks of seagulls take flight,their ivory wings catching the golden hues of the sun,creating an enchanting ballet in the *** air is filled with the gentle cries of these graceful birds,enhancing the island’s *** harmonious blend of nature’s elements,from the sapphire sea to the towering cliffs and the mesmerizing flight of seagulls,makes Changdao Island an artistic masterpiece painted by the hand of mother nature herself.

关键词： island Island gentle

Correlation of phytochemical content with antioxidant potential of various sweet potato (Ipomoea batatas) in West Java, Indonesia

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Asian Pacific Journal of Tropical Biomedicine 2018年第1期8卷 25-30页

作者： Irda Fidrianny hendy suhendy Muhamad Insanu Department of Pharmaceutical Biology School of Pharmacy-Bandung Institute of Technology

Objective: To determine antioxidant activity and phytochemical content from various tubers extracts of sweet potato(Ipomoea batatas) and to explore the correlation of phytochemical content with their antioxidant activities. Methods: Antioxidant activities were tested using DPPH and FRAP assays. Total phenolic was calculated by Folin-Ciocalteu reagent, flavonoid content by Chang's method and correlation with their antioxidant activities were analyzed by Pearson's method. Results: PO2 showed highest antioxidant activity, which had the lowest IC50 DPPH(10.54 μg/m L) and the lowest EC50 FRAP(11.14 μg/m L). PO2 showed the highest total phenolic(11.91 g GAE/100 g) and total flavonoid content(17.83 g QE/100 g). There were significantly negative correlation between total phenolic content and flavonoid content in sample PO with their IC50 DPPH and EC50 FRAP. IC50 DPPH of sample PP and PO showed significantly positive correlation with their EC50 FRAP. Conclusions: Result of DPPH method shows that all different ethyl acetate and ethanolic tubers extracts of four varieties of sweet potato are classified as strong and very strong antioxidant. Result of DPPH and FRAP methods indicates that phenolic and flavonoid compounds in sample PO contributes together to antioxidant activities. Antioxidant activities of sample PP and PO by DPPH method are linear to FRAP method.

关键词： Antioxidant DPPH FRAP Ipomoea batatas Tubers Varieties

Modeling projected changes of mangrove biomass in different climatic scenarios in the sunda Banda seascapes

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International Journal of Digital Earth 2017年第4期10卷 457-468页

作者： Mingshu Wang Marguerite Madden Ian hendy Estradivari Gabby N.Ahmadia Department of Geography University of GeorgiaAthensGAUSA The Institute of Marine sciences University of PortsmouthPortsmouthUK Yayasan World Wildlife Fund-Indonesia JakartaIndonesia Oceans Conservation World Wildlife Fund-USWashingtonDCUSA

Mangroves are critical in the ecological,economic and social development of coastal rural and urban ***,they are under threat by climate change and anthropogenic *** sunda Banda seascape(sBs),Indonesia,is among the world’s richest regions of mangrove biomass and *** inform current and future management strategies,it is critical to provide estimates of how mangroves will respond to climate change in this ***,this paper utilized spatial analysis with model-based climatic indicators(temperature and precipitation)and mangrove distribution maps to estimate a benchmark for the mangrove biomass of the sBs in six scenarios,namely the Last Inter-glacial Period,the current scenario(1950-2000)and all four projected Representative Concentration Pathways in 2070 due to climate *** mangroves gaining more biomass with climate change(the increase in CO_(2)concentration),this paper highlighted the great proportion of below-ground biomass in mangrove *** also showed that the changes in spatial distribution of mangrove biomass became more variable in the context of climate *** mangroves have been proposed as an essential component of climate change strategies,this study can serve as a baseline for future studies and resource management strategies.

关键词： Mangrove forests biomass climate change IPCC GIs natural resources

Discovering Qingdao:Where Chinese and Western Cultures Meet

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China Report AsEAN 2023年第6期8卷 42-43页

作者： hendy Yuniarto Beijing Foreign studies University

If you’re planning a trip to China,be sure to add Qingdao to your *** is a fantastic destination for travelers seeking a mix of culture,history,natural beauty,and *** is a picturesque coastal city located in east China’s shandong *** is renowned for stunning beaches,delicious seafood,and German-influenced *** a travel enthusiast,I recently had the opportunity to visit Qingdao,and I was thoroughly impressed by everything this city has to *** beautiful coastal city is appealing to many young Chinese and foreign travelers and worth visiting.

关键词： coastal Qingdao seeking

子宫平滑肌瘤妇女儿茶酚-O-甲基转移酶活性的激素调节

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世界核心医学期刊文摘（妇产科学分册） 2006年第11期2卷 46-46页

作者： salama s.A. Ho s.-L. A. Al-hendy 张旸 Department of Obstetrics and Gynecology University of Texas Medical Branch Galveston TX United States Dr.

Catechol-O-methyl transferase (COMT) expression is higher in leiomyomas compared with paired normal myometrium. The expression of COMT in leiomyoma cells is hormonally regulated- estrogen down-regulates, whereas P and... 详细信息

关键词：子宫平滑肌瘤甲基转移酶激素调节儿茶酚子宫肌层降调节