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

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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Significance of balloon aortic valvuloplasty as palliative procedure for symptom benefit in patients with severe aortic stenosis

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Journal of Geriatric Cardiology 2024年第3期21卷 374-378页

作者： Jovica Banovic Vladimir Djuric Vojislav Vuksinovic Sasa Loncar Department of Internal Medicine/Prijedor Republic of SrpskaBosnia and Herzegovina university Clinical Centre of Republic of Srpska Cardiology ClinicBanja LukaRepublic of SrpskaBosnia and Herzegovina

Aortic stenosis(AS)stands out as the most prevalent individual valvular defect *** onset and progression of AS mirror an active process akin to atherosclerosis,and the traditional triad of symptoms includes chest pain,breathlessness,and loss of *** takes a significant downturn when symptoms manifest,with mortality reaching approximately 50%-85% within the subsequent 5 years after symptom onset.

关键词： balloon stenosis mortality

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Splenic hamartomas in children

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World Journal of Clinical Cases 2024年第11期12卷 1909-1917页

作者： Maja Milickovic Petar Rasic Sofija Cvejic Dejana Bozic Djordje Savic Tanja Mijovic Sava Cvetinovic Slavisa M Djuricic Department of Abdominal Surgery Mother and Child Health Care Institute of Serbia"Dr.Vukan Cupic"Belgrade 11000Serbia Faculty of Medicine University of BelgradeBelgrade 11000Serbia Department of Radiology The Children’s University HospitalBelgrade 11000Serbia Department of Clinical Pathology Mother and Child Health Care Institute of Serbia"Dr.Vukan Cupic"Belgrade 11000Serbia Faculty of Medicine University of Banja LukaBanja Luka 78000Bosnia and Herzegovina

Splenic hamartomas(SHs)are uncommon,benign vascular lesions of unclear etiology and are mostly found incidentally on abdominal images,at surgery,or at *** the first case description,in 1861,less than 50 pediatric SH cases have been reported in the *** this article,we have performed an analysis of all SH cases in children published in the literature to date and presented our case of an 8-year-old male with *** lesions in children were shown to cause symptoms more often than in the adult *** observed SH sizes in children ranged from a few millimeters to 18 cm,and the symptomatic lesions were mostly larger or *** most common clinical finding was *** of hypersplenism were present in children with a single SH larger than 4.5 cm(diameter range:4.5-18.0 cm)and in those with multiple hamartomas,ranging from a few millimeters to 5 *** percent of patients with available laboratory findings had hematological abnormalities such as anemia,thrombocytopenia,or *** symptoms and signs included abdominal pain,recurrent infections,fever,night sweats,lethargy,growth retardation,and weight *** use of multiple imaging modalities may suggest the preoperative diagnosis of a splenic mass in children and determine the therapeutic ***,the final diagnosis of SH relies on histopathological ***,including total or partial splenectomy(PS),is the mainstay of SH *** M et *** in children WJCC https://*** 1910 April 16,2024 Volume 12 Issue 11 Although total splenectomy carries a greater risk of overwhelming post-splenectomy infection than PS it has remained the most performed surgical procedure in children with *** the majority of pediatric patients with symptomatic SH,resolution of symptoms and resolution or improvement of cytopenias occurred after surgical treatment.

关键词： Splenic hamartoma Pediatric Splenoma Clinical features Radiological features Histopathology Treatment

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Hybrid Power Supply System with Fuzzy Logic Controller: Power Control Algorithm, Main Properties, and Applications

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Journal of Modern Power Systems and Clean Energy 2022年第4期10卷 923-931页

作者： Dragana J.Petrović Miroslav M.Lazić Bojana V.JovanovićLazić Branko D.Blanuša Stanko O.Aleksić Department of Power Electronics Iritel a.d.BelgradeBelgradeSerbia Department of Power Electronics Faculty of Electrical Engineering University of Banja LukaBanja LukaSerbian

This paper presents a novel power supply system based on the use of fuzzy inference logic to improve the power control of renewable energy *** system comprises renewable solar and wind sources,and an accumulator battery is used as an additional power *** procedure for the parallel connection of multiple energy sources provides a stable power supply and optimal charging of the accumulative *** energy sources are connected in parallel using two serial converters and controlled by the controller based on the fuzzy *** reference voltage control of the serial converter enables an optimal use of available energy *** accumulative element is connected in parallel to compensate for the shortage of solar and wind energies,whereas if the available renewable energy exceeds the needs of the consumers,the surplus energy is accumulated in the *** measurements are conducted on the prototype of the hybrid power system under real conditions and compared with the applied systems of this *** novel system is mainly used in remote telecom locations where there is no power distribution network.

关键词： Fuzzy logic hybrid power source power supply parallel operation serial converter

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On Some Novel Fixed Point Results for Generalized F-Contractions in b-Metric-Like Spaces with Application

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Computer Modeling in Engineering & Sciences 2023年第4期135卷 673-686页

作者： Kastriot Zoto Ilir Vardhami Dusan Bajovic Zoran D.Mitrovic Stojan Radenovic Department of Mathematics and Computer Sciences Faculty of Natural SciencesUniversity of GjirokastraGjirokastra6001Albania Department of Mathematics Faculty of Natural SciencesUniversity of TiranaTirana1001Albania Faculty of Electrical Engineering University of Banja LukaBanja Luka78000Bosnia and Herzegovina Department of Mathematics Faculty of Mechanical EngineeringUniversity of BelgradeBeograd11120Serbia

The focusofourwork is on themost recent results infixedpoint theoryrelated *** variants of(s,q,φ,F)-contractions that expand,supplement and unify an important work widely discussed in the literature,based on existing classes of interpolative and *** particular,a large class of contractions in terms of s,q,φand F for both linear and nonlinear contractions are defined in the framework of b-metric-like *** main result in our paper is that(s,q,φ,F)-g-weak contractions have a fixed point in b-metric-like spaces if function F or the specified contraction is *** an application of our results,we have shown the existence and uniqueness of solutions of some classes of nonlinear integral equations.

关键词： (φ,F)-contraction (s,q,φ,F)-contraction b-metric-like space fixed point

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Non-iterative parameter estimation of the 2R-1C model suitable for low-cost embedded hardware

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Frontiers of Information Technology & Electronic Engineering 2020年第3期21卷 476-491页

作者： Mitar SIMI? Zdenka BABI? Vladimir RISOJEVI? Goran MSTOJANOVI? Faculty of Electrical Engineering University of Banja LukaBanja Luka 78000Bosnia and Herzegovina Faculty of Technical Sciences University of Novi SadNovi Sad 21000Republic of Serbia

Parameter estimation of the 2 R-1 C model is usually performed using iterative methods that require high-performance processing ***,there is a strong motivation to develop less time-consuming and more power-efficient parameter estimation *** low-complexity algorithms would be suitable for implementation in portable microcontroller-based *** this study,we propose the quadratic interpolation non-iterative parameter estimation(QINIPE)method,based on quadratic interpolation of the imaginary part of the measured impedance,which enables more accurate estimation of the characteristic *** 2 R-1 C model parameters are subsequently calculated from the real and imaginary parts of the measured impedance using a set of closed-form *** analysis conducted on the impedance data of the 2 R-1 C model obtained in both simulation and measurements shows that the proposed QINIPE method reduces the number of required measurement points by 80%in comparison with our previously reported non-iterative parameter estimation(NIPE)method,while keeping the relative estimation error to less than 1%for all estimated *** non-iterative methods are implemented on a microcontroller-based device;the estimation accuracy,RAM,flash memory usage,and execution time are *** show that the QINIPE method slightly increases the execution time by 0.576 ms(about 6.7%),and requires 24%(1.2 KB)more flash memory and just 2.4%(32 bytes)more RAM in comparison to the NIPE ***,the impedance root mean square errors(RMSEs)of the QINIPE method are decreased to 42.8%(for the real part)and 64.5%(for the imaginary part)of the corresponding RMSEs obtained using the NIPE ***,we compared the QINIPE and the complex nonlinear least squares(CNLS)estimation of the 2 R-1 C model *** results obtained show that although the estimation accuracy of the QINIPE is somewhat lower than the estimation accuracy of the CNLS,

关键词： 2R-1C model Embedded systems Parameter estimation Non-iterative methods Quadratic interpolation

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Tiling a Plane with Semi-Regular Equilateral Polygons with 2m-Sides

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Open Journal of Discrete Mathematics 2021年第1期11卷 13-30页

作者： Nenad Stojanovic Department of Mathematics Faculty of Agriculture University of Banja Luka Banja Luka Bosnia and Herzegovina

In this paper, tiling a plane with equilateral semi-regular convex polygons is considered, and, that is, tiling with equilateral polygons of the same type. Tiling a plane with semi-regular polygons depends not only on the type of a semi-regular polygon, but also on its interior angles that join at a node. In relation to the interior angles, semi-regular equilateral polygons with the same or different interior angles can be joined in the nodes. Here, we shall first consider tiling a plane with semi-regular equilateral polygons with 2m-sides. The analysis is performed by determining the set of all integer solutions of the corresponding Diophantine equation in the form of , whereare the non-negative integers which are not equal to zero at the same time, and are the interior angles of a semi-regular equilateral polygon from the characteristic angle. It is shown that of all semi-regular equilateral polygons with 2m-sides, a plane can be tiled only with the semi-regular equilateral quadrilaterals and semi-regular equilateral hexagons. Then, the problem of tiling a plane with semi-regular equilateral quadrilaterals is analyzed in detail, and then the one with semi-regular equilateral hexagons. For these semi-regular polygons, all possible solutions of the corresponding Diophantine equations were analyzed and all nodes were determined, and then the problem for different values of characteristic elements was observed. For some of the observed cases of tiling a plane with these semi-regular polygons, some graphical presentations of tiling constructions are also given.

关键词： Tiling a Plane Semi-Regular Plane Tiling Diophantine Equations

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Classification of Hallux Valgus Using Conjugated Deformity

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Journal of Applied Mathematics and Physics 2023年第6期11卷 1615-1633页

作者： Nenad Stojanović Mirko Sovilj Vesna Ivanišević Draško Vasović Department of Mathematics Faculty of Agriculture University of Banja Luka Banja Luka Bosnia and Hercegovina Faculty of Medicine University of Belgrade Belgrade Serbia Faculty of Medicine University of Banja Luka Banja Luka Bosnia and Hercegovina Institute for Orthopedic Surgery “Banjica” Belgrade Serbia

Hallux valgus is a complex deformity of the forefoot. It is the result of multiple effects of endogenous and exogenous etiological factors with different degrees of influence. The degree of hallux valgus deformity was assessed by radiological values of hallux valgus (HVA) and intermetatarsal (IMA) angle. Thus, each hallux valgus deformity corresponds to a pair (HVA, IMA) of hallux valgus angle (HVA) and intermetatarsal angle (IMA) values in the plane of the deformity. The intensity of the point position vector S (HVA, IMA) in the deformation plane determined by the relation represents the absolute (conjugate) value of the power deformities. The goal of the article is to explain the advantage of the definition of the degree of hallux valgus deformity using its absolute (conjugate) value, and then to show that the degree of deformity defined in this way enables a better classification of deformities for all values of the HVA and IMA angles. Furthermore, in this article, applying the definition of conjugate deformity, analytical expressions were constructed for the assessment of the average value of deformity correction after operative treatment, as well as the error assessment of deformity correction after operative treatment. All obtained results were checked on a sample of 396 operatively treated feet.

关键词： Conjugated Deformity Hallux Valgus Classification Deformity Correction

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A reference evapotranspiration map for Bosnia and Herzegovina

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International Soil and Water Conservation Research 2019年第1期7卷 89-101页

作者： Sabrija(C)adro Salwa Cherni-(C)adro Mihajlo Markovi(c) Jasminka(Z)urovec university of Sarajevo(UNSA) Faculty of Agriculture and Food Sciences(PPF)Bosnia and Herzegovina Hydro-Engineering Institute Sarajevo(HEIS) Bosnia and Herzegovina university of banja luka(UNIBL) Faculty of AgricultureBosnia and Herzegovina

There are three major challenges for climatic data availability for Reference Evapotranspiration (ET0) calculations in Bosnia and Herzegovina:limited data availability,discontinuity of data records,and low station *** main objective of this study was to apply reliable methods to calculate and spatially distribute ET0,while considering the impact of the elevation.A 20 m spatial resolution map was created for mean ET0 values at monthly,vegetation period (April-September) and annual temporal resolution at municipality (143 municipalities),regional (4 regions) and national spatial resolutions.108 weather stations for the period 1961-2016 (56 years) were utilized for spatial interpolation of ET0 using kriging with external drift *** required elevation for ET0 estimation at each grid node was ext'acted from the digital elevation model of Bosnia and ***0 was calculated using FAO-56 PenmanMonteith,and in cases where only minimum and maximum temperature data were available the Hargreaves-Samani equation adjusted with locally appropriate empirical radiation coefficient was used.A gradual decrease of mean ET0 values from the southern to central and northern to central part of the country is *** the all seasons (monthly,vegetation and annually),the southern region has greater ET0 than the other three regions (north,west and central-east),which are *** long-term mean annual ET0 for Bosnia and Herzegovina is 716 mm,approximately 78% (559 mm) of which occurs during in the vegetation period.

关键词： Reference evapotranspiration Interpolation Penman-Monteith Limited data Calibration

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Epidemic threshold influenced by non-pharmaceutical interventions in residential university environments

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Chinese Physics B 2024年第2期33卷 551-556页

作者：卢泽超赵生妹束华中巩龙延 Institute of Signal Processing and Transmission Nanjing University of Posts and TelecommunicationsNanjing 210003China College of Science Nanjing University of Posts and TelecommunicationsNanjing 210003China

The control of highly contagious disease spreading in campuses is a critical *** residential universities,students attend classes according to a curriculum schedule,and mainly pack into classrooms,dining halls and *** move from one place to *** simulate such environments,we propose an agent-based susceptible–infected–recovered model with time-varying heterogeneous contact *** close environments,maintaining physical distancing is the most widely recommended and encouraged non-pharmaceutical *** can be easily realized by using larger classrooms,adopting staggered dining hours,decreasing the number of students per dorm and so *** real-world influence remains *** numerical simulations,we obtain epidemic *** effect of such countermeasures on reducing the number of disease cases is also quantitatively evaluated.

关键词： epidemic threshold susceptible-infected-recovered model non-pharmaceutical interventions time-varying heterogeneous contact networks

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