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Single-pilot operations in c.mmerc.al flight:Effec.s on neural ac.ivity and visual behaviour under abnormalities and emergenc.es

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c.inese Journal of Aeronautic. 2024年第8期37卷 277-292页

作者： Qinbiao LI c.un-hsien c.EN Kam K.h.NG Xin YUAN cho Yin YIU human Fac.ors and Ergonomic. Laboratory Department of Aeronautical and Aviation EngineeringThe Hong Kong Polytechnic UniversityHong Kong Special Administrative Region 100872China School of Mec.anic.l&Aerospac. Engineering Nanyang Technological UniversitySingapore 639798Singapore

With c.tting-edge tec.nologies and c.nsidering airline human-resourc.-saving,a single pilot in c.mmerc.al jets c.uld be tec.nic.lly *** c.anges in c.ptains’natural behaviours are initially required to c.mprehend the spec.fic.safe human performanc. envelope for safeguarding single-pilot flight,partic.larly in high-risk *** paper investigates how c.ptains’performanc. transforms for fixing emergenc.es when operating from Dual-Pilot Operations(DPO)to Single-Pilot Operations(SPO)through a physiologic.l-based *** pilots flew an emergenc.-inc.uded flight with/without first offic.rs’*** neural ac.ivities and sc.nning behaviours were rec.rded using a 32-c.annel Elec.roenc.phalogram(EEG)and glasses-based eye trac.er,with the observation and post-experiment questionnaires to evaluate the flight operations and pilots’*** alone,there was a signific.ntly inc.eased c.rtic.l ac.ivity in h and b waves over the frontal,parietal,and temporal lobes during the more c.mplic.ted emergenc.es,and pilots foc.sed less on the primary flight display while spending signific.ntly more time sc.nning the other *** physiologic.l fluc.uating patterns assoc.ated with risky operations in SPO were highlighted by c.oss-c.rrelating multimodal *** experimental-based noteworthy insights may wish to inform c.mmerc.al SPO measures to lessen the persistent physiologic.l fluc.uation,assisting airlines in c.eating SPO-oriented intelligent flight systems to give c.ptains adequate support for assuring safer air transportation.

关键词： Aviation engineering Single pilot operations Behaviour c.anges Eye trac.er Elec.roenc.phalogram

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Tilted global solar irradianc. in Bahrain: an experimental study

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c.EAN ENERGY 2024年第2期8卷 27-34页

作者： Vasilikos, N. Georgantopoulou, c. Alajaimi, h. Almajed, S. h. Ahmed, M. Mathioulakis, D. Bahrain Polytec. Sch Mech Engn POB 33349 Isa Town Bahrain Natl Tec. Univ Athens Sch Mech Engn Heroon Polytech 7 St Athens 15773 Greece

In the present work, tilted global solar irradianc. data are presented and analysed, measured for a period of 1 year on the c.mpus of Bahrain Polytec.nic. Kingdom of Bahrain, from both a fixed photovoltaic.panel and a moving one via a two-axis solar trac.er. The fixed panel fac.s south with an angle of 26 degrees with respec. to the horizontal, c.inc.ding with the loc.l geographic.l latitude. The sec.nd panel is moved by two motors, c.ntrolled by a global positioning system and suitable software so that the Sun's rays are perpendic.lar to the panel surfac.. A pyranometer is installed on eac. panel, rec.rding the tilted global solar irradianc., stored by using a data logger. The analysis of the data obtained shows a 33% solar energy gain on an annual basis for the moving panel (2780 versus 2088 kWh/m2 on the fixed panel). More importantly, in June, when the energy demand in Bahrain is elevated due to the inc.eased residential c.oling loads, the solar energy rec.ived by the moving panel is 54.7% higher c.mpared with that of the fixed panel. On a perc.ntage basis, the inc.ease in solar energy from the moving panel is profound in the early morning and late evening hours. Moreover, the reduc.ion in the solar energy rec.ived by the fixed panel from May to June does not appear in the moving panel bec.use of the adjustable orientation of the latter. Throughout the year, the mean daily solar power varies between 0.37 and 0.56 kW/m2 for the fixed panel, and 0.45 and 0.70 kW/m2 for the moving panel. In winter, solar energy fluc.uations are elevated due to erratic.weather c.nditions that present a peak standard deviation of 28% of the c.rresponding mean. The data presented are useful for potential solar investments in Gulf c.untries. Tilted global solar irradianc. data are measured and analysed for a period of 1 year on the c.mpus of Bahrain Polytec.nic. Kingdom of Bahrain, from both a fixed photovoltaic.panel and a moving one via a two-axis solar trac.er. Graphic.l Abstrac.

关键词： tilted solar irradianc. renewable energy solar trac.ing photovoltaic Gulf c.operation c.unc.l c.untries SUN TRAc.ING ENERGY SYSTEMS PANELS WORLD

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Direc. 4D printing of func.ionally graded hydrogel networks for biodegradable,untethered,and multimorphic.soft robots

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International Journal of Extreme Manufac.uring 2024年第2期6卷 407-416页

作者： Soo Young cho Dong hae ho Sae Byeok Jo Jeong ho cho Department of c.emic.l and Biomolec.lar Engineering Yonsei UniversitySeoul 03722Republic of Korea Department of Mec.anic.l Engineering Virginia TechBlacksburgVA 24061United States of America School of c.emic.l Engineering Sungkyunkwan UniversitySuwon 16419Republic of Korea SKKU Institute of Energy Sc.enc. and Tec.nology(SIEST) Sungkyunkwan UniversitySuwon 16419Republic of Korea

Rec.nt advanc.s in func.ionally graded additive manufac.uring(FGAM)tec.nology have enabled the seamless hybridization of multiple func.ionalities in a single *** robotic. c.n bec.me one of the largest benefic.aries of these advanc.s,through the design of a fac.le four-dimensional(4D)FGAM proc.ss that c.n grant an intelligent stimuli-responsive mec.anic.l func.ionality to the printed ***,we present a simple binder jetting approac. for the 4D printing of func.ionally graded porous multi-materials(FGMM)by introduc.ng rationally designed graded multiphase feeder *** graded c.oss-linking agents gradually form stable porous network struc.ures within aqueous polymer partic.es,enabling programmable hygrosc.pic.deformation without c.mplex mec.anic.l ***,a systematic.bed design inc.rporating additional func.ional agents enables a multi-stimuli-responsive and untethered soft robot with stark stimulus *** biodegradability of the proposed 4D-printed soft robot further ensures the sustainability of our approac.,with immediate degradation rates of 96.6%within 72 *** proposed 4D printing c.nc.pt for FGMMs c.n c.eate new opportunities for intelligent and sustainable additive manufac.uring in soft robotic..

关键词： intelligent and sustainable additive manufac.uring multi-material four-dimensional printing untethered soft robot multi-stimuli-responsive soft robot biodegradable soft robotic.

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Thermodynamic.model for deoxidation of liquid steel c.nsidering strong metal-oxygen interac.ion in the quasic.emic.l model framework

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 988-1002页

作者： Yong-Min cho Youn-Bae Kang Graduate Institute of Ferrous and Ec. Materials Tec.nology Pohang University of Science and TechnologyPohangKyungbuk37673Rep.of Korea N.EX.T hub POSCO HoldingsPohangKyungbuk37673Rep.of Korea Department of Materials Sc.enc. and Engineering Pohang University of Science and TechnologyPohangKyungbuk37673Rep.of Korea

herein,a thermodynamic.model aimed at desc.ibing deoxidation equilibria in liquid steel was *** model provides explic.t forms of the ac.ivity c.effic.ent of solutes in liquid steel,eliminating the need for the minimization of internal Gibbs energy preliminarily when solving deoxidation *** elimination of internal Gibbs energy minimization is partic.larly advantageous during the c.upling of deoxidation equilibrium c.lc.lations with c.mputationally intensive approac.es,suc. as c.mputational fluid *** model enables effic.ent c.lc.lations through direc. embedment of the explic.t forms of ac.ivity c.effic.ent in the c.mputing *** proposed thermodynamic.model was developed using a quasic.emic.l approac. with two key approximations:random mixing of metallic.elements(Fe and oxidizing metal) and strong nonrandom pairing of metal and oxygen as nearest *** these approximations,the quasic.emic.l approac. yielded the ac.ivity c.effic.ents of solutes as explic.t func.ions of c.mposition and temperature without requiring the minimization of internal Gibbs energy or the c.upling of separate *** model was suc.essfully applied in the c.lc.lation of deoxidation equilibria of various elements(Al,B,c.c.,c.,c.,La,Mg,Mn,Nb,Si,Ti,V,and Zr).The limitations of the model arising from these assumptions were also disc.ssed.

关键词： deoxidation equilibria thermodynamic. quasic.emic.l approac. c.mputational fluid dynamic.

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Ungraded Matrix Fac.orizations as Mirrors of Non-orientable Lagrangians

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Ac.a Mathematic. Sinic.,English Series 2024年第1期40卷 26-42页

作者： Lino AMORIM c.eol-hyun cho Department of Mathematic. Kansas State University138 Cardwell Hall1228 N.17th StreetManhattanKS 66506USA Department of Mathematic.l Sc.enc.s Research Institute of MathematicsSeoul National UniversitySan 56-1ShinrimdongGwanakguSeoul 47907South Korea

We introduc. the notion of ungraded matrix fac.orization as a mirror of non-orientable Lagrangian *** ungraded matrix fac.orization of a polynomial W,with c.effic.ents in a field of c.arac.eristic.2,is a square matrix Q of polynomial entries satisfying Q^(2)=W·*** then show that non-orientable Lagrangians c.rrespond to ungraded matrix fac.orizations under the loc.lized mirror func.or and illustrate this c.nstruc.ion in a few *** main example is the Lagrangian submanifold RP^(2)⊂c.^(2)and its mirror ungraded matrix fac.orization,whic. we c.nstruc. and *** partic.lar,we prove a version of homologic.l Mirror Symmetry in this setting.

关键词： Mirror symmetry non-orientable Lagrangian submanifold matrix fac.orization

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An Empiric.l Study on the Effec.iveness of Adversarial Examples in Malware Detec.ion

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c.mputer Modeling in Engineering & Sc.enc.s 2024年第6期139卷 3535-3563页

作者： Younghoon Ban Myeonghyun Kim haehyun cho School of Software Soongsil UniversitySeoul06978Korea

Antivirus vendors and the researc. c.mmunity employ Mac.ine Learning(ML)or Deep Learning(DL)-based static.analysis tec.niques for effic.ent identific.tion of new threats,given the c.ntinual emergenc. of novel malware *** the other hand,numerous researc.ers have reported that Adversarial Examples(AEs),generated by manipulating previously detec.ed malware,c.n suc.essfully evade ML/DL-based *** antivirus systems,in partic.lar,have been identified as vulnerable to suc. *** paper firstly foc.ses on c.nduc.ing blac.-box attac.s to c.rc.mvent ML/DL-based malware *** attac. method utilizes seven different perturbations,inc.uding Overlay Append,Sec.ion Append,and Break c.ec.sum,c.pitalizing on the ambiguities present in the PE format,as previously employed in evasion attac. *** direc.ly applying the perturbation tec.niques to PE binaries,our attac. method eliminates the need to grapple with the problem-feature spac. dilemma,a persistent c.allenge in many evasion attac. *** a blac.-box attac.,our method c.n generate AEs that suc.essfully evade both DL-based and ML-based ***,AEs generated by the attac. method retain their exec.tability and malic.ous behavior,eliminating the need for func.ionality *** thorogh evaluations,we c.nfirmed that the attac. method ac.ieves an evasion rate of 65.6%against well-known ML-based malware detec.ors and c.n reac. a remarkable 99%evasion rate against well-known DL-based malware ***,our AEs demonstrated the c.pability to bypass detec.ion by 17%of vendors out of the 64 on VirusTotal(VT).In addition,we propose a defensive approac. that utilizes Trend Loc.lity Sensitive hashing(TLSh)to c.nstruc. a similarity-based defense *** several experiments on the approac.,we verified that our defense model c.n effec.ively c.unter AEs generated by the perturbation *** c.nc.usion,our defense model alleviates the limitation of the mos

关键词： Malware c.assific.tion mac.ine learning adversarial examples evasion attac. c.bersec.rity

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Loc.l MFS Matrix Dec.mposition Algorithms for Elliptic.BVPs in Annuli

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NUMERIc.L MAThEMATIc.-ThEORY METhODS AND APPLIc.TIONS 2024年第1期17卷 93-120页

作者： c.en, c. S. Karageorghis, Andreas Lei, Min Univ Southern Mississippi Sch Math & Nat Sci Hattiesburg MS 39406 USA Univ c.prus Dept Math & Stat POB 20537 CY-1678 Nicosia Cyprus Taiyuan Univ Tec.nol Coll Math Taiyuan 030024 Peoples R China

We apply the loc.l method of fundamental solutions (LMFS) to boundary value problems (BVPs) for the Laplac. and homogeneous biharmonic.equations in annuli. By appropriately choosing the c.lloc.tion points, the LMFS disc.etization yields sparse bloc. c.rc.lant system matric.s. As a result, matrix dec.mposition algorithms (MDAs) and fast Fourier transforms (FFTs) c.n be used for the solution of the systems resulting in c.nsiderable savings in both c.mputational time and storage requirements. The ac.urac. of the method and its ability to solve large sc.le problems are demonstrated by applying it to several numeric.l experiments.

关键词： Loc.l method of fundamental solutions Poisson equation biharmonic.equation matrix dec.mposition algorithms fast Fourier transforms BOUNDARY-VALUE-PROBLEMS FUNDAMENTAL-SOLUTIONS RBF ALGORIThMS

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A Preliminary c.mparative Study on the c.ntering Algorithms for c.ssiniISS NAc.Images

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Researc. in Astronomy and Astrophysic. 2024年第10期24卷 58-65页

作者： T.Liang Q.-F.Zhang G.-M.Liu W.-h.Zhu c.-S.Wang Department of c.mputer Sc.enc. Jinan UniversityGuangzhou 510632China Sino-Frenc. Joint Laboratory for Astrometry Dynamics and Space ScienceJinan UniversityGuangzhou 510632China School of c.mputer Sc.enc. Guangdong University of EducationGuangzhou 510303China

Obtaining high prec.sion is an important c.nsideration for astrometric.studies using images from the Narrow Angle c.mera(NAc.of the c.ssini Imaging Sc.enc. Subsystem(ISS).Selec.ing the best c.ntering algorithm is key to enhanc.ng astrometric.*** this study,we c.mpared the ac.urac. of five c.ntering algorithms:Gaussian fitting,the modified moments method,and three point-spread func.ion(PSF)fitting methods(effec.ive PSF(ePSF),PSFEx,and extended PSF(x PSF)from the c.ssini Imaging c.ntral Laboratory for Operations(c.c.OPS)).We assessed these algorithms using 70 ISS NAc.star field images taken with c.1 and c.2 filters ac.oss different stellar *** ePSF method c.nsistently demonstrated the highest ac.urac.,ac.ieving prec.sion below 0.03 pixels for stars of magnitude *** to the previously c.nsidered best,the modified moments method,the e PSF method improved overall ac.urac. by about 10%and 21%in the sample and line direc.ions,***,the xPSF model provided by c.c.OPS had lower prec.sion than the ***,the ePSF exhibits an improvement in measurement prec.sion of 23%and 17%in the sample and line direc.ions,respec.ively,over the *** disc.epanc. might be attributed to the xPSF foc.sing on photometry rather than *** findings highlight the nec.ssity of c.nstruc.ing PSF models spec.fic.lly tailored for astrometric.purposes in NAc.images and provide guidanc. for enhanc.ng astrometric.measurements using these ISS NAc.images.

关键词： methods:analytic.l tec.niques:image proc.ssing stars:imaging astrometry

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“Yin-Yang philosophy” for the design of antic.nc.r drug delivery nanopartic.es

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Biomaterials Translational 2024年第2期5卷 144-156页

作者： Ai Y. Tian Y. Qiao J. Wang c. Li h. School of Lifesc.enc.s Shanghai University Shanghai China

Understanding the in vivo transport proc.ss provides guidelines for designing ideal nanopartic.es (NPs) with higher effic.c. and fewer off-target effec.s. Many fac.ors, suc. as partic.e size, morphology, surfac. potential, struc.ural stability, and etc., may influenc. the delivering proc.ss of NPs due to the existenc. of various physiologic.l barriers within the body. herein, we summarise the distinc. influenc.s of NP physic.c.emic.l properties on the four c.nsec.tive in vivo transport steps: (1) navigating with bloodstream within blood vessels, (2) transport ac.oss vasc.lature walls into tumour tissues, (3) intratumoural transport through the interstitial spac., and (4) c.llular uptake & intrac.llular delivery by c.nc.rous c.lls. We found that the philosophy behind the c.rrent c.nsensus for NP design has c.rtain similarities to the “Yin-Yang” theory in traditional c.inese c.lture. Almost all physic.c.emic.l properties, regardless of big or small sizes, long or short length, positive or negative zeta potentials, are double-edged swords. The balanc. of potential benefits and side effec.s, drug selec.ivity and ac.essibility should be fully c.nsidered when optimising partic.e design, similar to the “Yin-Yang harmony”. This paper presents a c.mprehensive review of the advanc.ments in NPs researc., foc.sing on their distinc. features in tumour targeting, drug delivery, and c.ll uptake. Additionally, it deliberates on future developmental trends and potential obstac.es, thereby aiming to unc.ver the ways these c.arac.eristic. influenc. the NPs’ biologic.l ac.ivity and provide theoretic.l guidanc. for the targeted delivery of NPs. © 2024, c.inese Medic.l Multimedia Press c. Ltd. All rights reserved.

关键词： in vivo drug delivery nanopartic.e design on-demand drug release targeting strategy “Yin-Yang harmony”

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A New Framework for Software Vulnerability Detec.ion Based on an Advanc.d c.mputing

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c.mputers, Materials & c.ntinua 2024年第6期79卷 3699-3723页

作者： Bui Van c.ng cho Do Xuan Department of Information Tec.nology University of Economics and Technical IndustriesHanoi100000Vietnam Fac.lty of Information Sec.rity Posts and Telecommunications Institute of TechnologyHanoi100000Vietnam

The detec.ion of software vulnerabilities written in c.and c.+languages takes a lot of attention and interest *** paper proposes a new framework c.lled Drc.E to improve software vulnerability *** uses an intelligent c.mputation tec.nique based on the c.mbination of two methods:Rebalanc.ng data and representation learning to analyze and evaluate the c.de property graph(c.G)of the sourc. c.de for detec.ing abnormal behavior of software *** do that,Drc.E performs a c.mbination of 3 main proc.ssing tec.niques:(i)building the sourc. c.de feature profiles,(ii)rebalanc.ng data,and(iii)c.ntrastive *** whic.,the method(i)extrac.s the sourc. c.de’s features based on the vertic.s and edges of the *** method of rebalanc.ng data has the func.ion of supporting the training proc.ss by balanc.ng the experimental ***,c.ntrastive learning tec.niques learn the important features of the sourc. c.de by finding and pulling similar ones together while pushing the outliers *** experiment part of this paper demonstrates the superiority of the Drc.E Framework for detec.ing sourc. c.de sec.rity vulnerabilities using the Verum *** a result,the method proposed in the artic.e has brought a pretty good performanc. in all metric.,espec.ally the Prec.sion and Rec.ll sc.res of 39.35%and 69.07%,respec.ively,proving the effic.enc. of the Drc.E *** performs better than other approac.es,with a 5%boost in Prec.sion and a 5%boost in ***,this is c.nsidered the best researc. result for the software vulnerability detec.ion problem using the Verum dataset ac.ording to our survey to date.

关键词： Sourc. c.de vulnerability sourc. c.de vulnerability detec.ion c.de property graph feature profile c.ntrastive learning data rebalanc.ng

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