bluuebunny/crossref_metadata_2025 huggingface dataset:
Завышенные ожидания семьи как фактор формирования синдрома отложенной жизни
Authors: Найденова Елизавета В.
Published: February 2023

В статье рассмотрен вопрос причин возникновения синдрома отложенной жизни. Основное внимание в работе акцентируется на завышенных ожиданиях семьи как факторе формирования сценария и невроза отложенной жизни. Актуальность работы обуславливается широким распространением обозреваемого феномена. Новизна работы заключается в том, что представлен новый взгляд на проблему происхождения синдрома отложенной жизни. В работе впервые затрагивается вопрос возможности связи между уровнем родительских ожиданий от ребенка и формированием у него сценария отложенной жизни. Во введении автор приводит актуальность исследования, которая продиктована распространением синдрома отложенной жизни, его влиянием на жизнь людей и популяризацией данной темы в СМИ. Также приводится аналитический обзор различных подходов к вопросам синдрома отложенной жизни, жизненным сценариям и их происхождениям. Для исследования было проанкетировано 100 человек в возрасте от 18 до 65 лет. Такой выбор эмпирического объекта был сделан в связи с представлением о данной группе, как о личностях, сформировавших свои жизненные цели, планы и ценности, способные оценивать оказанное на них родительское влияние. В разделе «Методы» обозначены основные способы анализа как теоретических, так и эмпирических данных. Результаты исследования показывают связи между синдромом отложенной жизни и уровнем ожиданий семьи. В разделе «Обсуждение результатов» автор отмечает, что в семьях, в которых детям часто ставятся труднодостижимые цели особенно мотивируя их свершением желаний, важных для самих детей, есть основа для формирования и закрепления у ребенка сценария отложенной жизни. В более осознанном возрасте человек либо продолжает так же, как его приучили в детстве, откладывать удовлетворение каких-то потребностей на период после достижения глобальной цели, либо продолжит стремиться к целям, поставленным из вне.
Supercontraction of spider silks as a humidity-driven phase transition
Authors: Fazio V.
Published: February 2023

Abstract. Spider silks have been intensively studied among natural materials for their extreme mechanical properties such as very high strength, ultimate strain, and toughness. Another striking phenomenon characterizing spider silk, known as supercontraction, is a substantial contraction, up to a half of the initial length, occurring when an unconstrained silk thread is exposed to a wet environment. We propose a multiscale model that deduces the hygro-dependent macroscopic behaviour of the spider silks starting from the nano and micro-structure properties of the material. In particular, we describe the influence of humidity at the macromolecular scale by considering the moisture effects disrupting hydrogen-bonds and enabling the decrease of the natural (zero force) end-to-end chains length due to entropic effects. The main novelty of our theoretical approach is a description in the field of solid-solid phase transitions, with the system undergoing a transition driven by humidity from an unfolded, hard dry to a folded, soft wet configuration. Based on a statistical mechanical approach, we are able to describe the temperature dependence of the supercontraction effects and its cooperative properties quantitatively predicting the observed experimental behaviour.
Perturbations for vibration of nano-beams of local/nonlocal mixture
Authors: Eroglu U.
Published: February 2023

Abstract. Here we extend the perturbation approach, previously presented in the literature for Eringen’s two-phase local/nonlocal mixture model, to free vibration of purely flexible beams. In particular, we expand the eigenvalues and the eigenvectors into power series of the fraction coefficient of the non-local material response up to 2nd order. We show that the family of 0th order bending couples satisfy the natural and essential boundary conditions of the 1st order; hence, the 1st order solution can conveniently be constructed using the eigenspace of the 0th order with no necessity of additional conditions. We obtain the condition of solvability that provides the incremental eigenvalue in closed form. We further demonstrate that the 1st order increment of the eigenvalue is always negative, providing the well-known softening effect of long-range interactions among the material points of a continuum modelled with Eringen’s theory. We examine a simply supported beam as a benchmark problem and present the incremental eigenvalues in closed form.
An effective strategy to transform second-gradient equilibrium equations from the Eulerian to the Lagrangian configuration
Authors: Fedele R.
Published: February 2023

Abstract. In this communication the problem of transforming the equilibrium equations from the Eulerian to the Lagrangian form is discussed with reference to materials governed by second-gradient energy densities. In particular, novel theoretical achievements are outlined, which represent intermediate steps to attain the purpose: the transformation of edge vectors and of complementary orthogonal projectors over the boundary surface; a novel formula based on the divergence theorem for curved surfaces with boundary, relating material and spatial expressions; a remarkable relationship between Lagrangian and Eulerian (hyper-)stress tensors of different orders.
Multi-modal noise generation in low Mach number orifice plates: an experimental investigation
Authors: Quaroni L.N.
Published: February 2023

Abstract. An experimental campaign on aerodynamic noise generation by orifice plates in rectangular ducts for low Mach number flows is carried. The test plant allows for the measurement of the total emitted acoustic power both upstream and downstream of the orifice plates for varying mass flow rates through the 2N-Port method. A modal decomposition for the first eight propagating higher-order acoustic modes is also performed. Keeping the free flow area and the plates’ thickness constant, the tests allowed for a study of the influence of the number of circular orifices on the generated acoustic power as well as its modal composition. It is found that the orifices’ number does not influence the overall pressure drop caused by the presence of the obstacle. The generated noise on the contrary is greatly affected by such a parameter both for the plane-wave frequency range and especially so in the multi-modal one.
Mechanical properties of cables made with helically wound carbon-nanotube fibers for advanced structural applications
Authors: Migliaccio G.
Published: February 2023

Abstract. Big structures, such as super long suspension bridges, require materials that overcome the specific strength of steel, since there is a material-dependent limit size beyond which they shall collapse under their own weight. Carbon NanoTube Fibers (CNTFs) hold great promise for advanced applications, for their exceptional strength and stiffness per unit specific weight. We propose a theoretical model to describe the mechanical response of cables made of CNTFs. The mechanical response is studied via a variational approach and closed-form expressions are obtained for the stiffness parameters of the cable and the stress in the constituent CNTFs. This study shows that the stiffness and strength of the cable present opposite variations with respect to parameters associated with the geometric arrangement of the CNTFs, suggesting the existence of an optimal compromise yet to be experimentally verified.
R-Funicularity of shells and effective eccentricity: Influence of tensile strength
Authors: Argento G.R.
Published: February 2023

Abstract. The concept of Relaxed Funicularity (R-Funicularity) has been introduced in [2] to deal with the difficulties of designing a shell with a funicular behavior. The R-Funicularity has been defined by using a parameter called generalized eccentricity: a shell is said to be R Funicular if the generalized eccentricity belongs to an admissibility domain defined in terms of membrane forces N and bending moments M. Here we define an N-M admissibility domain that includes the shell tensile limit force N_t, not previously taken into account. The proposed domain is well described by a new parameter, the effective eccentricity, and is used to control the tensile stresses occurring on shells designed to be R-Funicular and to work under compression.
Finding damage in truss structures exploiting modal strains
Authors: Modesti M.
Published: February 2023

Abstract. The detection of potentially damaged elements in planar truss structures is a challenging task. Among the different methods proposed in literature, one promising procedure exploits the modal strains of the structure that are calculated from the flexibility matrix, which is, in turn, estimated from the lowest frequencies and corresponding modes of vibration. The benefit of this approach stems from the possibility of using a reduced number of mode shapes, usually available from the dynamic monitoring of the structure to perform the damage detection. In this work, a novel damage detection index based on modal strains is proposed, and its reliability in detecting stiffness reduction in elements of a planar truss is tested numerically.
Innovative devices for the protection of welded sections in steel structures
Authors: Benfratello S.
Published: February 2023

Abstract. The paper proposes the use of innovative devices devoted to the brittle collapse protection of welded steel sections, typically represented by the end beam cross-sections in framed structures. Reference is made to I-shaped cross-sections. At first, limiting to the case of plane stress, the relevant elastic domain is defined in the N,T,M space; then a plane frame equipped with the proposed devices and subjected to seismic load condition is studied, ensuring that the generalized stresses at the welded sections be within the relevant elastic domain.
A simple procedure for the non-linear optimization of cable tension for suspended bridges
Authors: Mascolo I.
Published: February 2023

Abstract. Long-span suspended bridges rely upon networks of tensed cables that carry the weight of the deck. The networks of cables are generally connected to a number of vertical towers (pylons) that transfer the forces to the foundations as in the case of cable-stayed bridge. Their structural behaviour is highly influenced by the pretension forces on account of the redundancy of the structure. Several methods have been proposed for determining pretension the forces in the cables, such as Load-Balance Method, Iterative Unit Load Method, Force Equilibrium Method, Zero Displacement Method. The present study aims to investigate the influence of geometrical non-linearities on the optimization of the design. To this end, the Force Equilibrium Method is here extended and compared to the use of a Finite Element commercial package, since this is the standard method in everyday engineering practice. The comparison between the Force Equilibrium Method and FEM results shows that the first method, in spite of its simplicity, is able to provide a reasonable and reliable alternative to the more complex non-linear FE approaches.
A novel prototype of diaphragm valve for passively compensated aerostatic pads
Authors: Colombo F.
Published: February 2023

Abstract. Thanks to their low friction, aerostatic pads are currently used in many high precision applications. However, due to the air compressibility, aerostatic bearings suffer from relatively low stiffness and damping. Active and passive compensation methods represent a valuable solution to reduce these limitations. This paper presents a novel prototype of a diaphragm valve for passively compensated aerostatic pads. The proposed valve was obtained through the improvements of a previous prototype. The main goal of this new design of the valve was to improve the reliability, repeatability and accuracy of regulation. The novel prototype is modelled through the same lumped parameter model that was used for the previous prototype. The preliminary experimental results demonstrate the efficiency and effectiveness of the proposed valve.
Automatic construction of structural meshes from photographic and laser surveys
Authors: Paduano I.
Published: February 2023

Abstract. The focus of this paper is the analyses of various work pipelines, allowing to manage the transition from in-situ surveys to cloud of points and geometric meshes optimized for structural purposes. This topic is very challenging, and today is almost always performed through homemade, uncontrolled, approaches, requiring the passage of information between numerous codes. These unsupervised workflows often compromise the integrity and the reliability of the results. Here two experimental case studies are reported to check the performances of two pipelines, based on photographic and laser surveys, respectively. The proposed comparison is used to outline significant indications on how properly manage the transformation, in order to create a “true” digital twin of the given structure.
Fractional diffusion of membrane receptors in endocytosis pathway
Authors: Nuzzo G.
Published: February 2023

Abstract. In this paper the diffusion model representing the motion of membrane receptors with respect to virus endocytosis is considered in the context of applied mechanics. The unexpected behaviour of the receptor density that moves from higher concentrations in the unbound phase to lower concentration at the right of the virus surface is accounted for introducing a mechanical drift term in the governing equation so that the difference of concentrations, higher in the bounded phase and lower in the unbounded phase is accounted for in the receptor motion. Additionally, a non-gaussian model of diffusion has been introduced in terms of fractional generalization of the Fick law.
Sequential linear analysis of no-tension masonry structures
Authors: Angjeliu G.
Published: February 2023

Abstract. A new application of the elastic no-tension material model is developed through Sequential Linear Analysis (SLA) to analyze masonry structures. The approach has been demonstrated to be more robust compared to incremental analysis procedures. In the SLA framework, the equilibrium state of a masonry-like material is sought through a series of linear elastic analyses. In the loading process, cracking strains are simulated by sequential reduction of the directional stiffness upon violation of the no-tension constraint in terms of principal stresses. Some applications are presented to show the effectiveness of the proposed method in analyzing masonry structures under the effect of gravity, lateral loading, and ground settlements.
Multiscale analysis of masonry vaults coupling shell elements to 3D-Cauchy continuum
Authors: Addessi D.
Published: February 2023

Abstract. This study adopts an enhanced multiscale approach to investigate the effects of the damaging process on the structural behavior of masonry vaults with regular texture, in view of their safety assessment. The model, recently developed by the authors, links two different structural models at macro and microscale, exploiting the advantages of each formulation. At the macroscopic level a homogeneous Mindlin-Reissner shell is modeled and its constitutive response is derived by the detailed analysis of a three-dimensional (3D) masonry Unit Cell (UC) studied at microlevel. The UC is considered as the assembly of elastic bricks and damage-plastic zero-thickness interfaces, representative of both mortar and mortar-unit interaction, thus accounting for the actual geometry, arrangement and constitutive response of each constituent material. A Transformation Field Analysis procedure is used to link the two scales, speeding up the numerical simulations. Structural response of a masonry vault under differential settlements is investigated, determining its load-bearing capacity and the damaging path evolving in the structure up to collapse. The reliability of the results is proved by comparison with outcomes derived by detailed micromechanical analysis, interpreting and arguing similarities and differences.
Some remarks on the evaluation of work and dissipated energy associated with rate-independent hysteretic forces
Authors: Capuano R.
Published: February 2023

Abstract. We provide closed-form expressions to compute the path-dependent work performed by generalized rate-independent hysteretic forces, simulated by using a brand-new model denominated Vaiana-Rosati Model (VRM). In particular, such expressions are valid over a generic generalized displacement interval. Furthermore, we provide a closed-form expression for evaluating the dissipated energy associated with the work done by a rate-independent hysteretic force when a full cycle of periodic generalized displacement is applied.
Materials with memory: some new results in viscoelastic models
Authors: Carillo S.
Published: February 2023

Abstract. The classical model of viscoelastic body is reconsidered. As well known the deformation response of a material is termed viscoelastic when it does not depend only on the status of the material in the considered time, but also on its deformation history. Furthermore, the system is dissipative: such dissipative nature induce the use of viscoelastic materials in devising anti-seismic dissipators. Aiming to model new and innovative materials different forms of the relaxation modulus which characterises the response of the material are considered. Cases of a non-classical relaxation modulus are studied. Thus, a relaxation modulus which may be unbounded or less regular or modified to describe a material whose mechanical response is changed when the material with time, this phenomenon is usually termed ”aging” are investigated. Finally, the viscoelastic response can be controlled on devising magneto-viscoelastic materials via injection of micro or nano particles magnetically sensible.
On the dynamic stability of elastic structures subjected to follower forces
Authors: Levi F.
Published: February 2023

Abstract. Within the framework of the second-order theory, some classical stability problems, whose critical load corresponded to dynamic instability, were considered in the paper [1]. The main focus was on systems with just one lumped mass. This idealization, together with the assumption of negligible axial strain and the adoption of the second-order theory, reduced the considered systems to a single Lagrangian coordinate. In this way, static methods could be applied to derive the analytical expression of the stiffness coefficient and to study the dynamic stability, starting with a well-known example, namely, a cantilever beam with a lumped mass at the free end subjected to a follower load [2]. In this paper, a new lumped mass system is studied: a straight-axis beam with constant cross-sectional area and stiffness, mass-free, hinged at one end, simply supported at an intermediate point (with a sliding plane parallel to the beam axis) and with the other end free, where a lumped mass is present and a follower force is applied. As in the examples shown in [1], in this example the first asymptote of the stiffness coefficient corresponds to the critical load, due to divergence at infinity. It is shown that this critical load is equal to the buckling load due to divergence of an auxiliary structure, which differs from the original one in that the concentrated mass is replaced by a constraint that blocks the corresponding Lagrangian coordinate.
Using multiple singular values in topology optimization of dynamic systems
Authors: Venini P.
Published: February 2023

Abstract. Within the general framework of frequency-domain topology optimization of Multi Input-Multi Output (MI-MO) dynamic systems, suitable norms of the input/output transfer matrix are introduced as possible merit functions to be minimized. Among them, the by now classical H_∞-norm (i.e. the supremum of the maximum singular value over the whole frequency range), and the so-called nuclear norm (i.e. the sum of all the positive singular values are considered. Heuristic motivations are given that suggest which norm should one choose according to the practical objective to be pursued alongside a few numerical examples on topology optimization of 2D linear-elastic multiload SI-SO and MI-MO dynamic systems.
The dynamics of circular arches with multiple damage
Authors: Cannizzaro F.
Published: February 2023

Abstract. The governing equation of the dynamics of the planar inextensible Euler-Bernoulli arch with multiple damage is tackled in this study by employing the distributional approach. Precisely, the presence of impairments is modelled via cracks that can be effectively embedded in the governing equation by means of the Dirac’s delta generalised functions. The governing equation is defined over a unique integration domain. The proposed integration strategy leads to closed form expressions of the displacement mode shapes maintaining the size of the problem as that of the undamaged arch regardless the number of cracks located along the span. The latter advantage avoids the enforcement of continuity conditions at the discontinuous sections. The proposed solution extends the integration procedure proposed in the static context to the vibration analysis and allows determining the modal characteristics of damaged circular arches. The versatility of the obtained closed form solution allows a straightforward execution of parametric analyses and is here adopted to evaluate the sensitivity of the eigenproperties of the multi-cracked circular arch to the change of meaningful geometric and mechanical parameters.
Multiscale approach to decohesion in cell-matrix systems
Authors: Di Stefano S.
Published: February 2023

Abstract. We propose a model for cell-matrix decohesion that highlights the role of elasticity in this process. In doing this, we specialize our previous study of focal adhesion, an integrin mediated structure that oversees and guides the mutual interactions between cells and the extracellular matrix. Specifically, we consider a two-scale asymptotic homogenization technique to study the multi-scale nature of decohesion. Thus, we are able to use micro-structural information available at length scales smaller than those at which focal adhesions are observed. Based on classical two-scale asymptotic techniques the proposed approach allows to define effective elastic coefficients encoding the intrinsic heterogeneous properties of both focal adhesions and extracellular matrix.
A single-variable approach for layered beams with imperfect interfaces
Authors: Monetto I.
Published: February 2023

Abstract. The first-order shear deformable laminated beam problem is reformulated in terms of a fictitious bending displacement as primal variable. A fourth-order differential equation governs the problem with two additional unknown constants coming from the integration of the longitudinal displacement. With the classical six boundary conditions, the problem is complete and well posed. An isogeometric collocation scheme is developed to solve the problem numerically. The formulation is completely locking-free and satisfies high continuity requirements for the approximation functions. The results for an exemplary structure confirm the validity and the good performance of the method, which is preliminary to the single variable reformulation of a more accurate zig-zag model for laminates with perfect and imperfect interfaces.
One-dimensional metastructures composed of cables with scatter masses: waves, vibrations and band gaps
Authors: Moscatelli M.
Published: February 2023

Abstract. This work analyzes the dynamic behavior of structural elements that can be modelled as taut cables with a discrete array of punctual attached and hanging masses. The propagation of mechanical waves is strongly influenced by the presence of such scatter elements. We found that the problem is governed by a discrete equation, whose solutions depend on the behavior of an equivalent mass density, that varies with frequency. The spectrum of the problem is characterized by the presence of band gaps. This behavior is generally exploited for the design of metastructures. A parametric study of the equivalent mass is finally given.
Graded meta-waveguides for elastic energy splitting
Authors: Iorio L.
Published: February 2023

Abstract. Engineered metamaterials for precise wave manipulation and control is a new challenge for many applications in the field of mechanical vibration control and energy harvesting. Inspired by the advancement in wave manipulation and localization performance of elastic waveguides thanks to the introduction of resonators, we try to assess if these systems can be applied also into the junctions between beams that make up lattices. The goal is to achieve control over elastic wave propagation and define whether the local resonators are able to enhance the redirection of the wave into a perpendicular beam. Furthermore, evaluations concerning elastic energy localization in the resonators are reported to assess whether these systems are also suitable for energy localization and energy harvesting.
Post-earthquake continuous dynamic monitoring of the twin belfries of the Cathedral of Santa Maria Annunziata of Camerino, Italy
Authors: Standoli G.
Published: February 2023

Abstract. In this paper the results of over two years of continuous monitoring of the twin bell towers of the Cathedral of Camerino (Italy) are presented. The monitoring activity target is the evaluation of the dynamic behavior of the twin belfries after the damages occurred during the seismic events of 2016 and the application of fast securing. The experimental data are acquired in continuous using four triaxial MEMS accelerometers, two for each structure, on two opposite corners of the bell cells. Data processing is managed with an automatic system which elaborates the signals and executes Operational Modal Analysis to track the modal characteristics of the structures and their evolution in time. Correlation with environmental factors allows to discern the effect of climatic conditions on the variations of dynamics.
Deep learning for structural health monitoring: An application to heritage structures
Authors: Carrara F.
Published: February 2023

Abstract. In this work, we employ recent deep learning techniques for time-series forecasting to inspect and detect anomalies in the large dataset recorded during a long-term monitoring campaign conducted on the San Frediano bell tower in Lucca. We frame the problem as an unsupervised anomaly detection task and train a Temporal Fusion Transformer to learn the normal dynamics of the structure. We then detect the anomalies by looking at the differences between the predicted and observed frequencies.
Application of OMA technique to masonry slender towers: FEM updating and sensitivity analysis
Authors: Li Rosi D.
Published: February 2023

Abstract. Bell towers are masonry slender structures prone to damage caused by vibrations due to human activities, such as motor-vehicle traffic and operating machines in building sites, to bells’ ringing and, of course, vulnerable to strong vibrations induced by earthquakes. Several studies with Operational Modal Analysis applications to masonry historical slender towers demonstrate that their modal properties are typical and recurrent and depend mainly on the geometric features determining mass distribution and on the boundary conditions due to adjacent buildings and subjacent foundation soil. In the paper a sensitivity analysis of modal frequency obtained by FEM eigenvalue analysis to the soil modelling approach is carried out. The case study is the historical bell tower of San Giuseppe in Aci Castello church. The natural frequencies of the tower, identified through OMA procedure are considered for comparison.
Influence of a hemp biocomposite reinforcement on masonry vaults dynamic response
Authors: Gioffre M.
Published: February 2023

Abstract. In this paper the effectiveness of the application of a hemp biocomposite reinforcement at the extrados of a masonry barrel vault was investigated. To this aim, two specimens of unreinforced (UV) and reinforced (RV) masonry vaults were built having the same geometry with brickwork material and subjected to shaking table seismic tests. The comparison of the dynamic behavior between the two specimens was carried out by increasing the intensity of the seismic input, which was simultaneously applied on both the structures. The evaluation of the progressive damage induced by the seismic input was observed by visual inspections and natural frequencies decay estimated by experimental dynamic identification through the application of Operational Modal Analysis (OMA) techniques.
Multiscale failure analysis of fiber-reinforced composite structures via a hybrid cohesive/volumetric nonlinear homogenization strategy
Authors: Gaetano D.
Published: February 2023

Abstract. In this work, a novel multiscale model for softening periodic microstructures is proposed, relying on a nonlinear homogenization method combined with a cohesive/volumetric finite element model. This strategy is able to overcome the mesh sensitivity issues usually experienced by purely volumetric homogenization techniques in presence of strain localization. As the main ingredient of the proposed approach, a microscopically informed traction-separation law for the embedded interfaces is extracted, starting from the homogenized bulk behavior obtained for a suitably chosen Repeating Unit Cell (RUC) subjected to different macro-strain paths. The present approach has been fully validated by performing several numerical simulations of the main damage phenomena experienced by fiber-reinforced composite structures, with special reference to transverse micro-cracking. Finally, to investigate the reliability and the accuracy of the proposed model, a comparison with direct simulations performed on fully meshed specimens has been presented, in terms of both load-displacement curves and associated crack patterns.
Use of Multiple-Select Multiple-Choice Items in a Dental Undergraduate Curriculum: Retrospective Study Involving the Application of Different Scoring Methods
Authors: Kanzow Philipp , Schmidt Dennis , Herrmann Manfred , Wassmann Torsten , Wiegand Annette , Raupach Tobias
Published: February 2023

Background

Scoring and awarding credit are more complex for multiple-select items than for single-choice items. Forty-one different scoring methods were retrospectively applied to 2 multiple-select multiple-choice item types (Pick-N and Multiple-True-False [MTF]) from existing examination data.

Objective

This study aimed to calculate and compare the mean scores for both item types by applying different scoring methods, and to investigate the effect of item quality on mean raw scores and the likelihood of resulting scores at or above the pass level (≥0.6).

Methods

Items and responses from examinees (ie, marking events) were retrieved from previous examinations. Different scoring methods were retrospectively applied to the existing examination data to calculate corresponding examination scores. In addition, item quality was assessed using a validated checklist. Statistical analysis was performed using the Kruskal-Wallis test, Wilcoxon rank-sum test, and multiple logistic regression analysis (P<.05).

Results

We analyzed 1931 marking events of 48 Pick-N items and 828 marking events of 18 MTF items. For both item types, scoring results widely differed between scoring methods (minimum: 0.02, maximum: 0.98; P<.001). Both the use of an inappropriate item type (34 items) and the presence of cues (30 items) impacted the scoring results. Inappropriately used Pick-N items resulted in lower mean raw scores (0.88 vs 0.93; P<.001), while inappropriately used MTF items resulted in higher mean raw scores (0.88 vs 0.85; P=.001). Mean raw scores were higher for MTF items with cues than for those without cues (0.91 vs 0.8; P<.001), while mean raw scores for Pick-N items with and without cues did not differ (0.89 vs 0.90; P=.09). Item quality also impacted the likelihood of resulting scores at or above the pass level (odds ratio ≤6.977).

Conclusions

Educators should pay attention when using multiple-select multiple-choice items and select the most appropriate item type. Different item types, different scoring methods, and presence of cues are likely to impact examinees’ scores and overall examination results.
Менеджмент ризиків загальної анестезії пацієнтів із залежністю від психоактивних речовин
Authors: Khaitovych M.V. , Mazur I.P. , Tyrchiak D.V.
Published: February 2023

Проведено пошук у базах даних Scopus, Web of Science, MedLine, The Cochrane Library. Постійне вживання опіоїдів після операції є складовою опіоїдної епідемії, оскільки значна частина пацієнтів, які раніше не вживали опіоїди, після операції починають хронічно їх споживати. Опіоїди, кокаїн тощо можуть викликати тяжкі небажані реакції, порушувати дію загальних анестетиків. У пацієнта, який зловживає опіоїдами, можуть виникнути такі проблеми загальної анестезії: вищі вимоги до анальгетиків; розвиток толерантності; потреба в корекції фізичних і/або психологічних симптомів відміни; гіпералгезія, спричинена опоїдом; ускладнення через шлях або спосіб зловживання опіоїдами; взаємодія лікарських засобів; складне лікування післяопераційного болю. Оскільки пацієнти не завжди повідомляють лікарю про вживання психоактивних речовин, потрібно активно виявляти пацієнтів з високим ризиком зловживання опіоїдами або з розладами, обумовленими вживанням опіоїдів, а також інших психоактивних речовин. Необхідно проводити ретельний збір анамнезу, об’єктивне й інструментально-лабораторне обстеження пацієнтів перед оперативним втручанням. Необхідно запевнити пацієнта, що конфіденційність буде збережена, а мета збору інформації полягає в досягненні адекватного менеджменту болю. Для анестезії пацієнтів, які вживають опіоїди, доцільно використовувати премедикацію з включенням бупренорфіну, а для зменшення використання опіоїдів — мультимодальний режим неопіоїдної аналгезії (парацетамол, нестероїдні протизапальні лікарські засоби, магнезії сульфат, кетамін, клонідин, есмолол, регіонарна анестезія тощо). Вживання кокаїну, марихуани є протипоказанням для застосування кетаміну та інших засобів, які впливають на тонус симпатичної нервової системи.
Роль інтердентальної гігієни в підтримці здоров’я порожнини рота
Authors: Mazur I.P. , Ventsuryk Yu.O. , Mazur P.V.
Published: February 2023

У статті висвітлені важливі анатомічні й фізіологічні аспекти будови інтерпроксимального простору. Наведені сучасні засоби, які використовуються для підтримання здоров’я тканин пародонта серед населення. Мікробна біоплівка утворюється на всіх поверхнях зубів, але саме в ділянці міжзубних проміжків фізіологічне очищення утруднене. Наведені результати дослідження демонструють ефективність використання різних засобів інтердентальної гігієни. Підкреслено важливість щоденного використання інтердентальних засобів гігієни.
Робота групи експертів МОЗ України за стоматологічними напрямами та впровадження медико-технологічних документів зі стандартизації медичної допомоги
Authors: Vakhnenko O.M.
Published: February 2023

У статті наведені ключові положення щодо створення групи експертів МОЗ України. Подається короткий аналіз роботи групи експертів МОЗ України за напрямами «терапевтична стоматологія», «хірургічна стоматологія», «ортопедична стоматологія», «дитяча стоматологія», «ортодонтія», «стоматологія». Наведено чинну систему створення та впровадження медико-технологічних документів зі стандартизації медичної допомоги в системі Міністерства охорони здоров’я України. Аналізується сьогоднішній стан справ із впровадження медико-технологічних документів зі стандартизації медичної стоматологічної допомоги.
A Comprehensive Review of Advertisement Platforms
Authors: Ambikar Jui , Paithane Aaditya , Gala Ishan , Kulkarni Pranav , Chiddarwar Girija
Published: February 2023

Abstract: With the breakneck pace of progress in today’s world, any self-sustaining business needs to ensure that they maximize their profits while also cutting down on losses, essentially described as optimization. For the same optimization in advertisements and marketing, various factors, vendors, and methods must be considered before making any significant business decisions. This paper primarily reviews Google AdWords and Meta Ads, two advertising services. Comprehensive reviews of all factors, including interest targeting an estimated reach of the advertisement to the target audience, are conducted while comparing the advantages and disadvantages of both platforms.
Digital Content Recommendation System through Facial Emotion Recognition
Authors: Dubey Arnav , Shingala Bhargey , Panara Jay R , Desai Kush , P Assistant Prof. Sahana M
Published: February 2023

Abstract: The use of facial emotion recognition technology in movie and music recommendation systems has become increasingly popular. In this paper, an all-encompassing evaluation of the present advancements in this field is provided, and the possible advantages and di culties of utilizing this technology are deliberated. The first part of the paper presents a brief overview of the di‰erent facial emotion recognition algorithms and how they work. This is followed by a review of the existing research on the use of these algorithms in movie and music recommendation systems. The second part of the paper discusses the potential benefits of using facial emotion recognition in movie and music recommendation systems. These include the ability to make more personalized recommendations based on the user's emotional state, as well as the potential for improving the overall user experience. The third part of the paper examines the challenges and limitations of using facial emotion recognition in movie and music recommendation systems. These include issues related to the accuracy and reliability of the algorithms, as well as concerns about privacy and ethical considerations
Implications of Behavioural Finance in the Derivative Segment
Authors: Nair Vishnu R
Published: February 2023

Abstract: The field of finance has evolved significantly over the years, and with the advent of behavioural finance, a new perspective has emerged in the way market participants behave and make decisions. This article conceptually explores the implications of behavioural finance in the derivatives segment, which is a complex and sophisticated financial instrument that allows investors to hedge their positions, speculate, and manage risk. The article provides an overview of traditional finance theory and introduces the concepts of behavioural finance, followed by the various behavioural biases that can affect decisionmaking in the derivative market. Finally, the article concludes by highlighting the potential benefits of incorporating behavioural finance into the derivatives segment.
Demonstration of a Response Time Based Remaining Useful Life (RUL) Prediction for Software Systems
Authors: Islam Mohammad Rubyet , Sandborn Peter
Published: February 2023

Prognostic and Health Management (PHM) has been widely applied to hardware systems in the electronics and non-electronics domains but has not been explored for software. While software does not decay over time, it can degrade over release cycles. Software health management is confined to diagnostic assessments that identify problems, whereas prognostic assessment potentially indicates when in the future a problem will become detrimental.  Relevant research areas such as software defect prediction, software reliability prediction, predictive maintenance of software, software degradation, and software performance prediction, exist, but all of these represent diagnostic models built upon historical data – none of which can predict an RUL for software. This paper addresses the application of PHM concepts to software systems for fault predictions and RUL estimation. Specifically, this paper addresses how PHM can be used to make decisions for software systems such as version update/upgrade, module changes, system re-engineering, rejuvenation, maintenance scheduling, budgeting, and total abandonment. This paper presents a method to prognostically and continuously predict the RUL of a software system based on usage parameters (e.g., the numbers and categories of releases) and performance parameters (e.g., response time). The model developed has been validated by comparing actual data, with the results that were generated by predictive models. Statistical validation (regression validation, and k-fold cross validation) has also been carried out. A case study, based on publicly available data for the Bugzilla application is presented. This case study demonstrates that PHM concepts can be applied to software systems and RUL can be calculated to make system management decisions.
Recent research progress of paper-based supercapacitors based on cellulose
Authors: xiong chuanyin , Wang Tianxu , Wang Tianxu , Han Jing , Zhang Zhao , Ni Yonghao
Published: February 2023

With the rapid development of science and technology, paper-based
functional materials have become the core of the field of new materials.
Recently, they have received extensive attention in the field of energy
storage due to their advantages of rich and adjustable porous network
structure, good flexibility. As an important energy storage device,
paper-based supercapacitors have important application prospects in many
fields, and have also received extensive attention from researchers in
recent years. At present, researchers have modified and regulated
paper-based materials by different means such as structural design and
material composition to enhance their electrochemical storage capacity.
The development of paper-based supercapacitors provides an important
direction for the development of green and sustainable energy.
Therefore, it is of great significance to summarize the relevant work of
paper-based supercapacitors for their rapid development and application.
In this review, the recent research progress of paper-based
supercapacitors based on cellulose was summarized in terms of various
cellulose-based composites, preparation skills and electrochemical
performance. Finally, some opinions on the problems in the development
of this field and the future development trend were proposed. It is
hoped that this review can provide valuable references and ideas for the
rapid development of paper-based energy storage devices.
A Low-Power NPN-based Bandgap Voltage Reference in An Ultra-wide Temperature Range
Authors: Xue Weidong , Zhang Yiseng , Fang Jian , Ren Junyan
Published: February 2023

A low-power NPN-based bandgap voltage reference (BGR) over an ultra-wide
temperature range is presented. The conventional NPN-based BGRs cannot
maintain a low-temperature coefficient (TC) over an ultra-wide
temperature range due to the inherent substrate leakage current of the
NPN bipolar junction transistors (BJT) in the high-temperature range.
This work introduces a new NPN-based BGR unaffected by substrate leakage
current and receives low TC over the range of -40℃ to 150℃. The proposed
circuit was fabricated in a 180 nm CMOS process. It consumes 2uA from a
4V power supply, and its average TC is 14.89ppm/℃. Also, the average
line sensitivity is 0.039%/V.
The Influence of Age, Gender and Weight on Sex Hormone Levels and Histological Development of Reproductive Organs in Arabi Sheep
Authors: Jumaa Aseel Jameel , Kassim Waleed Yosief
Published: February 2023

This study was conducted in the College of Agriculture - University of Basra from 1/9/2020 to 15/1/2021 by collecting 120 blood samples from males and females of the Arabi sheep breed, as well as taking samples from reproductive organs (testes and ovaries) to evaluate the effect of age, weight and sex of animals on sexual hormone levels . Samples were divided into three age groups (5-8 months, 9-12 months and 1-1.5 years) and three body weight groups (15-25, 26-36, 37-47) kg. The results showed a significant (P<0.05) increase in the concentration of gonadotropin hormones (FSH, LH) and steroidal hormones (estrogen, progesterone and testosterone) in animals older than 9 months. The concentration of FSH and LH hormones were higher females compared to males. All levels of sex hormones significantly (P<0.05) increased when the body weight increased to more than 26 kg in both sexes. Reproductive organs in both sexes (testes and ovaries) developed when the animal age and weight increased.
Vitamin D deficiency Associates with Disease Severity in Rheumatoid Arthritis Patients
Authors: Al-Sarray Zamin A. , Hussein Raghad H. , Al-Hafidh Ali H. , Al-Rayahi Izzat A.
Published: February 2023

Vitamin D considered as a key player in various autoimmune disorders, such as rheumatoid arthritis, due to its immunological modulatory effect. Together with Anti-double stranded DNA (Anti-dsDNA), Anti-cyclic citrullinated peptide (Anti-CCP) is considered among the indicators of the disease severity in rheumatoid arthritis. The present study aimed to measure the level of vitamin D in RA patients besides measuring anti-dsDNA, anti-CCP, RF, complete blood count (CBC) and Erythrocyte Sedimentation Rate (ESR) for comparing it with its corresponding level in healthy control group. This study was a descriptive cross-sectional study involving sequential RA patients who visited the Rheumatology clinic for outpatients during  three-months period starting from July 2018, at the Baghdad Teaching Hospital. Sixty individuals (30 RA patients and 30 age and gender matched healthy control) were enrolled in this study. Blood samples were collected and serum levels of anti-dsDNA, 25-hydroxy vitamin D (25[OH]), anti-CCP and RF besides C3, C4, CBC and ESR were measured. A highly significant decrease was displayed in the mean level of vitamin D in RA patients (18.67±17.70 ng/mL) when compared to its level in the control group (35.07 ±3.71 ng/mL), (normal value: 20 and 40 ng/mL), whereas, anti-dsDNA level normal value: (<30.0 IU/mL) was significantly increased in RA patients (122.27±65.89 IU/ml) as compared to its mean level in the control group (17.77±3.56 IU/ml) with an inverse relationship between anti-dsDNA levels vitamin D levels in RA patients. No statistical difference noted in C3 and C4 levels between patients and control groups. Rheumatoid arthritis patients with positive RF had statistically higher anti-CCP (normal value: less than 20 U/ml) than those with negative RF (39.83±11.449 vs 21.67±4.658 u/ml). As expected, a highly significant increase was observed in ESR of patients when compared to that of the control. In addition, an alteration was noted in some circulating blood cells count.
The Antibacterial Activity of the Biosynthesized Copper Oxide Nanoparticles by Lantana camara Flowers Extract Against Some Bacterial Isolated from Burns
Authors: Hussein Loma Majeed , Hasan Abbas Yaseen
Published: February 2023

The study included 70 Surface swabs collected from patients in different ages of both genders suffering from burns infections. All the specimens were diagnosed by subculturing in differential and selective media, microscopically and by following the biochemical tests to confirm identifications. Antibiotic susceptibility test was done to all the bacterial isolates.The identification of the clinical isolates showed that the 16(22.9%) were belonged to Staphylococcus aureus and 6(8.6%) of Staphylococcus epidermidis , whereas 23(32.8%),20(28.6%) isolates were for Pseudomonas aeruginosa ,Acinetobacter baumannii respectively. Copper oxide nanoparticles were biosynthesized by Lantana camara flower extracts which acted as a reducing agent for copper nitrate salts, characterization of the metal oxide was done by using Ultra violate visible light Spectroscopy, Fourier transforms Infrared spectroscopy, X-ray Diffraction, Atomic Force Microscopy and Field Emission Scanning Electron Microscopy. The biological activity of Copper Oxide Nanoparticles was screened toward three clinical isolates that showed multiple drug resistance isolated from burns by following agar wells diffusion method which proved the ability of copper oxide nanoparticles to inhibit growth of the clinical bacterial isolates. The minimum inhibitory concentrations were determined toward the tested bacteria by using the microdilution method.