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Geochemistry of Sediments from the Lopare Basin(Bosnia and Herzegovina):Implications for Paleoclimate,Paleosalinity,Paleoredox and Provenance

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Acta Geologica Sinica(English Edition) 2020年第5期94卷 1591-1618页

作者： AleksandraŠAJNOVIĆ nenad GRBA Franz NEUBAUER Milica KAŠANIN-GRUBIN Ksenija STOJANOVIĆ nenad petković Branimir JOVANČIĆEVIĆ University of Belgrade Center of ChemistryICTMStudentski trg 12-1611000 BelgradeSerbia University of Novi Sad Faculty of SciencesDepartment of ChemistryBiochemistry and Environmental ProtectionTrg Dositeja Obradovica 321000 Novi SadSerbia Paris Lodron University of Salzburg Department of Geography and GeologyHellbrunnerstrasse 345020 SalzburgAustria University of Belgrade Faculty of ChemistryStudentski trg 12-1611000 BelgradeSerbia Rio Tinto–Rio Sava Exploration Takovska 4511000 BelgradeSerbia

A combined inorganic and organic geochemical study was carried out on marls and mudstones collected from the Lower Miocene Lopare Basin,Bosnia and Herzegovina.A total of 46 samples collected from two boreholes,Pot 1(depth of 193 m)and Pot 3(depth of 344 m),showed that element abundances like boron(B),lithium(Li),strontium(Sr),uranium(U),chromium(Cr),nickel(Ni),magnesium(Mg),sodium(Na)and calcium(Ca)are much higher than average than in the upper continental crust(UCC).Chemical composition indicates at least two sources:(i)Mesozoic ophiolites occurring in the north of the investigated area,and(ii)dacito-andesitic pyroclastics(Mesozoic to Cenozoic).Lopare Basin sedimentation was influenced by strong evaporation resulting in a partly hypersaline lake,which formed during a warm climatic period,probably during the Miocene Climatic Optimum.A brief episode of humid climate conditions resulted in the basin fillingup and deposition of felsic sediments enriched in thorium(Th).Organic geochemistry shows that the majority of studied sediments contains predominantly immature to marginally mature algal organic matter(OM).The biomarker patterns are generally in agreement with the geological history of the Lopare Basin and inorganic and mineralogical ***,the molecular distribution of n-alkanes as reliable climatic andδ-MTTC as paleosalinity indicators do not support this conclusion.

关键词： geochemistry provenance analysis paleoenvironmental conditions salinity/hypersalinity biomarker Lopare Basin Bosnia and Herzegovina

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Enhanced air-coupled impact echo technique by phase analysis of signals from multiple sensors

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 297-310页

作者： Najjiya Almallah nenad Gucunski New Jersey Department of Transportation New Jersey 08625USA Department of Civil&Environmental Engineering Rutgers University-New BrunswickNJ 08854USA

This paper presents an air-coupled impact echo(IE)technique that relies on the phase spectrum of the collected data to find the frequencies corresponding to the reflections from *** proposed technique takes advantage of the fact that the IE compression wave is not a propagating wave,but it is the 1st order symmetrical(S1)mode Lamb wave at zero group velocity(S1-ZGV).Therefore,it searches the phase spectra of the data collected by multiple sensors to locate the frequency corresponding to the lowest phase *** a result,the technique reduces the effect of propagating waves,including the direct acoustic wave and ambient *** is named the Constant Phase IE(CPIE).The performance of the CPIE is experimentally compared with the regular amplitude spectrum-based IE technique and two other multisensor IE *** CPIE shows a performance advantage,especially in a noisy environment.

关键词： nondestructive testing(NDT) nondestructive evaluation(NDE) bridge inspection bridge evaluation impact echo bridge delamination concrete bridge deck air-coupled sensing MEMS

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Target acquisition performance in the presence of JPEG image compression

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Defence Technology（防务技术） 2024年第3期33卷 30-41页

作者： Boban Bondzulic nenad Stojanovic Vladimir Lukin Sergey A.Stankevich Dimitrije Bujakovic Sergii Kryvenko University of Defence in Belgrade Military AcademyVeljka Lukica Kurjaka 3311000 BelgradeSerbia National Aerospace University Department of Information-Communication TechnologiesChkalova 1761070 KharkivUkraine National Academy of Sciences of Ukraine Scientific Centre for Aerospace Research of the EarthOles Honchar 55-b01054 KyivUkraine

This paper presents an investigation on the effect of JPEG compression on the similarity between the target image and the background,where the similarity is further used to determine the degree of clutter in the *** new clutter metrics based on image quality assessment are introduced,among which the Haar wavelet-based perceptual similarity index,known as HaarPSI,provides the best target acquisition prediction *** is shown that the similarity between the target and the background at the boundary between visually lossless and visually lossy compression does not change significantly compared to the case when an uncompressed image is *** future work,through subjective tests,it is necessary to check whether this presence of compression at the threshold of just noticeable differences will affect the human target acquisition *** values are compared with the results of subjective tests of the well-known target Search_2 database,where the degree of agreement between objective and subjective scores,measured through linear correlation,reached a value of 90%.

关键词： JPEG compression Target acquisition performance Image quality assessment Just noticeable difference Probability of target detection Target mean searching time

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Functional Dependence of IM and HV Angle in Hallux Valgus Deformity before and after Operative

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Journal of Applied Mathematics and Physics 2024年第5期12卷 1626-1646页

作者： nenad Stojanović Mirko Sovilj Vesna Ivanišević Department of Mathematics Faculty of Philosophy University of Banja Luka Banja Luka Bosnia and Herzegovina Higher Medical School Prijedor Bosnia and Herzegovina Faculty of Medicine University of Banja Luka Banja Luka Bosnia and Hercegovina

Hallux valgus is a relatively common and multifaceted complex deformity of the front part of the foot. It is the result of multiple effects of innate (endogenous) and exogenous etiological factors with different degrees of influence. The degree of hallux valgus deformity is usually assessed by radiological values of hallux valgus (HV) and intermetatarsal (IM) angles. The aim of the paper is to justify the definition of hallux valgus deformity as a function of one angle, (HVA or IMA), and then to determine the functional connection and the most suitable function equalizing the values of the angles IMA and HVA. As hallux valgus is a double angulation deformity, the analytically determined connection between the HVA and IMA angles reduces the study of the deformity to the study of function with one argument, and makes the analysis of deformity changes before and after operative treatment simpler. For the determined connections between the angles, the values of linear proportionality coefficients and regression coefficients of corresponding linear functions of analytical equalization of the value of the IM angle and the degree of deformity for a given value of the HV angle were experimentally determined. The obtained results were checked on a sample of 396 operatively treated hallux valgus deformities. The presented analytical approach and the obtained functional links of IMA and HVA enable quantitative observation of the change in the degree of deformity based on the radiologically determined value of these angles, and the established nonlinear function will be useful for evaluating the expected value of the IM angle and the degree of deformity based only on the measured value of the HV angle. .

关键词： Functional Connection of Deformity Angles Analytical Equalization of IM Angle Values Hallux Valgus Intermetatarsal Angle Correction of Deformity

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Novel green technology for wastewater treatment: Geo-material/geopolymer applications for heavy metal removal from aquatic media

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International Journal of Sediment Research 2023年第1期38卷 33-48页

作者： nenad Grba Andre Baldermann Martin Dietzel Department of Chemistry Biochemistry and Environmental Protection Faculty of Sciences University of Novi Sad Institute of Applied Geosciences and NAWI Graz Geocenter Graz University of Technology

The aim of this paper is to show the concise chemico-physical adsorbent performance of water purification systems utilizing geo-(e.g., allophane, clinoptilolite, and smectite) and bio-polymer materials(e.g.,chitosan or cellulose nanocomposite materials) and to propose an optimal ground-water remediation technique. The performance of geo-materials is evaluated based on the individual sorption and immobilization capacities for various priority substances and pollutants(e.g., lead, zinc, cadmium, copper,arsenic, and others), their availability, and cost-efficient use. A systematic assessment of the sorption potential of geo-materials in comparison to other available sorbents used for the removal of harmful aqueous metal ions is made through a literature review. This paper introduces novel sustainable technologies based on natural and tailored silicate-polymerized substances(geo-materials and geopolymers),and highlights their applicability in the treatment of water and solid matter contaminated by heavy metal ions. The advantages of geo-materials and geopolymers over other commercially available sorbents used for heavy metal ion removal from solution are presented through a literature review. Benefits and current challenges of geo-materials and geopolymers applications in water processing technologies and in environmental remediation are discussed, with recognition of their performance, individual sorption and immobilization capacities, availability, and cost-efficient use. The applications described here comprise:(i) the removal of heavy metal ions from contaminated water using in-situ remediation strategies;(ii) heavy metal ion immobilization through co-precipitation with silicate binders in underground stabilization and waste solidification scenarios; and(iii) a proposal for a new geo-material/geopolymer-based solidification and stabilization technology for efficient, sustainable, and simultaneous treatment of soil/sediment and groundwater at environmental hotspots.

关键词： Geo-materials Heavy metal ions Environmental protection Water treatment Clay minerals Sustainability

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Quadricuspid aortic valve and right ventricular type of myocardial bridging in an asymptomatic middle-aged woman:A case report

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World Journal of Clinical Cases 2022年第25期10卷 8954-8961页

作者： Ivana Sopek Merkaš nenad Lakušić Maja Hrabak Paar Department of Cardiology Special Hospital for Medical Rehabilitation Krapinske TopliceKrapinske Toplice 49217Croatia Department of Clinical Medicine Faculty of Dental Medicine and Health OsijekOsijek 31000Croatia Department of Internal Medicine Family Medicine and History of MedicineFaculty of Medicine OsijekOsjiek 31000Croatia Department of Diagnostic and Interventional Radiology University Hospital Centre ZagrebZagreb 10000Croatia School of Medicine University of ZagrebZagreb 10000Croatia

BACKGROUND Quadricuspid aortic valve(QAV)is a very rare congenital cardiac defect with the incidence of 0.0125%-0.033%(<0.05%)predominantly causing aortic regurgitation.A certain number of patients(nearly one-half)have abnormal function and often require surgery,commonly in their fifth or sixth *** usually appears as an isolated anomaly but may also be associated with other cardiac congenital *** is considered the main diagnostic method although more and more importance is given to computed tomography(CT)and magnetic resonance imaging(MRI)as complementary *** SUMMARY A 60-year-old female patient was referred for transthoracic ultrasound of the heart as part of a routine examination in the treatment of arterial *** did not have any significant *** was confirmed and there were no elements of valve stenosis with moderate aortic *** first,it seemed that in the projection of the presumed left coronary cusp,there were two smaller and equally large cusps along with two larger and normally developed *** CT imaging was performed to obtain an even more precise valve morphology and it showed that the location of the supernumerary cusp is between the right and left coronary cusp,with visible central malcoaptation of the ***,coronary computed angiography confirmed the right-type of myocardial bridging at the distal segment of the left anterior descending coronary *** valve dysfunction often occurs in middle-aged patients and results in surgical treatment,therefore,a 1-year transthoracic echocardiogram control examination and follow-up was recommended to our *** This case highlights the importance of diagnosing QAV since it leads to progressive valve dysfunction and can be associated with other congenital heart defects which is important to detect,emphasizing the role of cardiac CT and MRI.

关键词： Quadricuspid aortic valve Congenital cardiac defect Aortic insufficiency Multimodal imaging Myocardial bridging Case report

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A versatile interferometric technique for probing the thermophysical properties of complex fluids

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Light(Science & Applications) 2022年第5期11卷 979-990页

作者： Gopal Verma Gyanendra Yadav Chaudry Sajed Saraj Longnan Li nenad Miljkovic Jean Pierre Delville Wei Li GPL Photonics Lab State Key Laboratory of Applied OpticsChangchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences130033 ChangchunChina School of Physical Sciences University of LiverpoolLiverpool L693BXUK Materials Research Laboratory University of IllinoisUrbanaILUSA Department of Mechanical Science and Engineering University of IllinoisUrbanaILUSA Department of Electrical and Computer Engineering University of IllinoisUrbanaILUSA International Institute for Carbon Neutral Energy Research(WPI-I2CNER) Kyushu University744 MotookaNishi-kuFukuoka 819-0395Japan University of Bordeaux CNRSLOMAUMR 5798F-33405 TalenceFrance

Laser-induced thermocapillary deformation of liquid surfaces has emerged as a promising tool to precisely characterize the thermophysical properties of pure ***,challenges arise for nanofluid(NF)and soft biofluid systems where the direct interaction of the laser generates an intriguing interplay between heating,momentum,and scattering forces which can even damage soft ***,we report a versatile,pump-probe-based,rapid,and non-contact interferometric technique that resolves interface dynamics of complex fluids with the precision of~1 nm in thick-film and 150 pm in thin-film regimes below the thermal limit without the use of lock-in or modulated *** characterize the thermophysical properties of complex NF in three exclusively different types of ***,when the NF is heated from the bottom through an opaque substrate,we demonstrate that our methodology permits the measurement of thermophysical properties(viscosity,surface tension,and diffusivity)of complex NF and ***,in a top illumination configuration,we show a precise characterization of NF by quantitively isolating the competing forces,taking advantage of the different time scales of these ***,we show the measurement of NF confined in a metal cavity,in which the transient thermoelastic deformation of the metal surface provides the properties of the NF as well as thermo-mechanical properties of the *** results reveal how the dissipative nature of the heatwave allows us to investigate thick-film dynamics in the thin-film regime,thereby suggesting a general approach for precision measurements of complex NFs,biofluids,and optofluidic devices.

关键词： deformation thermophysical film

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Spatial data trusts:an emerging governance framework for sharing spatial data

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International Journal of Digital Earth 2023年第1期16卷 1607-1639页

作者： nenad Radosevic Matt Duckham Mohammad Saiedur Rahaman Serene Ho Katherine Williams Tanzima Hashem Yaguang Tao School of Science RMIT UniversityMelbourneAustralia School of Computing Technologies RMIT UniversityMelbourneAustralia Frontier SI MelbourneAustralia Department of Computer Science and Engineering Bangladesh University of Engineering and TechnologyDhakaBangladesh

Data Trusts are an important emerging approach to enabling the much wider sharing of data from many different sources and for many different purposes,backed by the confidence of clear and unambiguous data *** Trusts combine the technical infrastructure for sharing data with the governance framework of a legal *** concept of a data Trust applied specifically to spatial data offers significant opportunities for new and future applications,addressing some longstanding barriers to data sharing,such as location privacy and data *** paper introduces and explores the concept of a‘spatial data Trust’by identifying and explaining the key functions and characteristics required to underpin a data Trust for spatial *** work identifiesfive key features of spatial data Trusts that demand specific attention and connects these features to a history of relevant work in thefield,including spatial data infrastructures(SDIs),location privacy,and spatial data *** conclusions identify several key strands of research for the future development of this rapidly emerging framework for spatial data sharing.

关键词： Data governance spatial information location privacy indigenous data sovereignty spatial data quality

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Numerical algorithm for rigid body position estimation using the quaternion approach

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Acta Mechanica Sinica 2018年第2期34卷 400-408页

作者： Miodrag Zigic nenad Grahovac Department of Mechanics Faculty of Technical SciencesUniversity of Novi Sad

This paper deals with rigid body attitude estimation on the basis of the data obtained from an inertial measurement unit mounted on the body. The aim of this work is to present the numerical algorithm, which can be easily applied to the wide class of problems concerning rigid body positioning, arising in aerospace and marine engineering, or in increasingly popular robotic systems and unmanned aerial vehicles. Following the considerations of kinematics of rigid bodies, the relations between accelerations of different points of the body are given. A rotation matrix is formed using the quaternion approach to avoid singularities. We present numerical procedures for determination of the absolute accelerations of the center of mass and of an arbitrary point of the body expressed in the inertial reference frame, as well as its attitude. An application of the algorithm to the example of a heavy symmetrical gyroscope is presented, where input data for the numerical procedure are obtained from the solution of differential equations of motion, instead of using sensor measurements.

关键词： Rigid body Kinematics Inertial measurement unit Euler parameters Quaternion

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Bicuspid aortic valve with associated aortopathy, significant left ventricular hypertrophy or concomitant hypertrophic cardiomyopathy: A diagnostic and therapeutic challenge

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World Journal of Clinical Cases 2023年第18期11卷 4251-4257页

作者： Ivana Sopek Merkaš nenad Lakušić Mladen Predrijevac KrešimirŠtambuk Maja Hrabak Paar Department of Cardiology Special Hospital for Medical Rehabilitation Krapinske TopliceKrapinske Toplice 49217Croatia Department of Clinical Medicine Faculty of Dental Medicine and Health OsijekJ.J.Strossmayer University of OsijekOsijek 31000Croatia Department of Internal Medicine Family Medicine and History of MedicineFaculty of Medicine OsijekJ.J.Strossmayer University of OsijekOsijek 31000Croatia Department of Cardiovascular Surgery Magdalena Clinic for Cardiovascular DiseasesKrapinske Toplice 49217Croatia Department of Cardiology Magdalena Clinic for Cardiovascular DiseasesKrapinske Toplice 49217Croatia Department of Diagnostic and Interventional Radiology University Hospital Centre ZagrebZagreb 10000Croatia School of Medicine University of ZagrebZagreb 10000Croatia

Due to its prevalence of 0.5%to 2%in the general population,with a 75%predominance among men,bicuspid aortic valve is the most common congenital heart *** is frequently accompanied by other cardiac congenital anomalies,and clinical presentation can vary significantly,with stenosis being the most common manifestation,often resulting in mild to moderate concentric hypertrophy of the left *** is the primary diagnostic modality utilized for establishing the diagnosis,and it is often the sole diagnostic tool relied upon by ***,due to the heterogeneous clinical presentation and possible associated anomalies(which are often overlooked in clinical practice),it is necessary to employ various diagnostic methods and persist in finding the accurate diagnosis if multiple inconsistencies *** employing this approach,we can effectively manage these patients and provide them with appropriate *** a clinical case from our practice,we provide an overview of the literature on bicuspid aortic valve with aortophaty and the possible association with hypertrophic cardiomyopathy,diagnostic methods,and treatment *** review article highlights the critical significance of achieving an accurate diagnosis in patients with bicuspid aortic valve and significant left ventricular *** is crucial to exclude other possible causes of left ventricular outflow tract obstruction,such as sub-or supra-aortic obstructions,and hypertrophic cardiomyopathy.

关键词： Bicuspid aortic valve Left ventricular hypertrophy Left ventricular tract obstruction Hypertrophic cardiomyopathy Aortopathy Multimodal imaging

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