bluuebunny/crossref_metadata_2025 huggingface dataset:
Fourier Transform Analysis of GPS-Derived Mobility Patterns: A Prospective Study on Diagnosis and Mood Monitoring in Bipolar and Major Depressive Disorders (Preprint)
Authors: Lee Ting-Yi , Chen Ching-Hsuan , Liu Chih-Min , Chen I-Ming , Chen Hsi-Chung , Wu Shu-I , Hsiao Chuhsing Kate , Kuo Po-Hsiu
Published: January 2025

BACKGROUND

Mood disorders, including bipolar disorder (BP) and major depressive disorder (MDD), are characterized by significant psychological and behavioral fluctuations, with mobility patterns serving as potential markers of emotional states.

OBJECTIVE

Leveraging GPS data as an objective measure, this study explores the diagnostic and monitoring capabilities of Fourier transform, a frequency-domain analysis method, in mood disorders.

METHODS

A total of 62 participants (BP: 20; MDD: 27; healthy controls: 15) contributed 5,177 person-days of data over observation periods ranging from 5 days to 6 months. Key GPS indicators—location variance (LV), transition time (TT), and entropy (EN)—were identified as reflective of mood fluctuations and diagnostic differences between BP and MDD.

RESULTS

Fourier transform analysis revealed that the maximum power spectra of LV and EN differed significantly between BP and MDD groups, with BP patients exhibiting greater periodicity and intensity in mobility patterns. Notably, BP participants demonstrated consistent periodic waves (e.g., 1-day, 4-day, and 9-day cycles), while such patterns were absent in MDD. Daily GPS data showed stronger correlations with ecological momentary assessment (EMA)-reported mood states compared to weekly or monthly aggregations, emphasizing the importance of day-to-day monitoring. Depressive states were associated with reduced LV and TT on weekdays, and lower EN on weekends, indicating that mobility features vary with social and temporal contexts.

CONCLUSIONS

This study underscores the potential of GPS-derived mobility data, analyzed through Fourier transform, as a non-invasive and real-time diagnostic and monitoring tool for mood disorders. The findings suggest that the intensity of mobility patterns, rather than their frequency, may better differentiate BP from MDD. Integrating GPS data with EMA could enhance the precision of clinical assessments, provide early warnings for mood episodes, and support personalized interventions, ultimately improving mental health outcomes. This approach represents a promising step toward digital phenotyping and advanced mental health monitoring strategies.
Unreliable Narrators: Agatha Christie’s ‘Murder of Roger Ackroyd’ and Other Examples
Authors: Arora Gopika
Published: January 2025

This paper examines the literary concept of an unreliable narrator and how it is used to create suspense and tension in crime and thriller books. The report begins with an explanation of the term "unreliable narrator" and its origins before delving into the many varieties of unreliable narrators outlined by William Riggan in his book "Picaros, Mad Men, Nafs, and Clowns: The Unreliable First-person Narrator." The article then looks at Edgar Allan Poe's "The Tell-Tale Heart" and Agatha Christie's "The Murder of Roger Ackroyd'' as examples of how an unreliable narrator is used in literature, particularly in detective fiction. The key arguments offered include the various forms of unreliable narrators, the use of an unreliable narrator to build suspense and plot twists, and the implications of an unreliable narrator on reader trust and participation. According to the paper, using an unreliable narrator is a powerful storytelling tactic that challenges readers' assumptions and perceptions of narrative and character and is a technique that has been increasing in use and popularity now.
CONSTITUTIONAL PRECEDENT IN THE US SUPREME COURT REASONING
Authors: Schultz David
Published: January 2025

Precedent or stare decisis is a central feature of common law systems, such as in the United States. Precedent in the United States is employed as an interpretive tool to guide judicial interpretations of legal texts, but it is considered part of the law and binding not only on the parties to the case but also on other courts and governmental bodies. This article examines the role of constitutional precedent in the US Supreme Court reasoning. It describes what precedent is, its justification, and how it operates as a part of the law to constrain or bind judicial decision making. The article also examines situations when constitutional precedent has been rejected and why, and how that pattern of rejection has changed over time. Overall, the purpose of the article is to familiarize students and scholars with the role the constitutional precedent occupies in the US legal reasoning and law.
DEGRADED FAMILY AS A CAUSE OF JUVENILE DELINQUENCY
Authors: Andrejić Dimitrije
Published: January 2025

Degraded family refers to a family structure that has experienced significant breakdowns in its fundamental roles and functions. This degradation is often manifested in various forms, such as domestic violence, neglect, substance abuse, or severe financial instability. Such family environments lack emotional support, supervision, and social norms typically provided by a stable family. As a result, children growing up in such families may develop behavioral issues, lack proper role models, and have limited access to education or positive social interactions. The author first addresses the etiology of juvenile delinquency, emphasizing that the deficient and degraded family is a fundamental and decisive cause of delinquency among young people. In addition to highlighting the accepted definitions and understanding of deficient and degraded families, the paper emphasizes the degradation of the family in a broader sense, indicating that the degradation of the family as a core social institution is a contributing factor to juvenile delinquency. The causal relationship between juvenile delinquency and family dynamics is illustrated by some statistical data from Serbia and the USA. In the conclusion, the author emphasizes the degradation of the family as a natural institution, which serves as a fertile ground for a degraded family in the criminological context. Finally, the author sees a return to traditional, conservative values as a possible path to the 'healing' of the modern family.
CONSIDERATIONS REGARDING THE ROLE OF THE POLICE IN ROMANIA, IN THE CONTEXT OF GOOD GOVERNANCE
Authors: Albu Maria
Published: January 2025

At present, against the backdrop of military conflicts taking place in different parts of the world, security has become one of the main concerns and demands of citizens, both on a personal level and in the public sphere. As one of these armed conflicts is currently underway in the vicinity of Romania, there is an intense need to strengthen state security, safety and the role of state authorities. At the international level, the interest in security refers not only to armed conflicts but also to the devastating events such as mass movements of migrants and refugees, famines, pandemics, drugs, organized crime and terrorism. In this context, the role of public authorities in Romania is essential and the activity of the police within the administrative authorities is vital.
∆f−LACUNARY STATISTICAL CONVERGENCE OF ORDER β
Authors: Kasap Mithat , Altinok Hifsi
Published: January 2025

The main object of this article is to introduce the concepts of ∆f-lacunary statistical convergence of order β and strong ∆f-lacunary summability of order β for sequences of fuzzy numbers and define some sequence classes related to these concepts. We give some inclusion relations between those sequence classes.
AN APPROACH TO SEMIHYPERMODULES OVER SEMIHYPERRINGS
Authors: Al Tahan Madeleine , Davvaz Bijan
Published: January 2025

In this paper, we introduce semihypermodules over semihyperrings as a generalization of semimodules over semirings. Besides studying their properties, we introduce an equivalence relation on them and use it to define factor semihypermodules. Moreover, we discuss the (semi-)isomorphism theorems for semihypermodules and present some of their interesting applications. Finally, we project our results on semihyperrings and deduce the (semi-)isomorphism theorems for semihyperrings.
ON AN OVER-RING C(X)∆ OF C(X)
Authors: Sen Ritu , Saha Rudra Pratap
Published: January 2025

Our aim in this paper is to introduce a ring of functions defined on a topological space X having a special property. By C(X)∆ we denote the set of all realvalued functions defined on the topological space X, the discontinuity set of elements of which are members of ∆ ⊆ P(X), where ∆ satisfies the following properties: (i) for each x ∈ X, {x} ∈ ∆, (ii) for A, B ∈ P(X) with A ⊆ B, B ∈ ∆ implies that A ∈ ∆ and (iii) for A, B ∈ ∆, A ∪ B ∈ ∆. This C(X)∆ is an over-ring of C(X), moreover, C(X) ⊆ C(X)F ⊆ C(X)∆ ⊆ RX. The ring C(X)∆ is also almost regular. We study the ∆-completely separated sets and C∆-embedded subsets of X. Complete characterizations of fixed maximal ideals are then done and algebraic properties of C(X)∆ have been studied. In [6], the authors have introduced FP-spaces, for which the ring C(X)F is regular. Here we have generalized the notion of FP-spaces in the context of C(X)∆, so that the ring in question becomes regular. As a result, ∆Pspaces have been introduced, it has been proved that every P-space is a ∆P-space and examples are given in support of the fact that there exist ∆P-spaces which are not P-spaces.
ON THE GEODESICS AND S-CURVATURE OF A HOMOGENEOUS FINSLER SPACE WITH SQUARE-ROOT (α, β)-METRIC
Authors: Zeinali Milad L. , Latifi Dariush
Published: January 2025

In this paper, we consider the square-root (α; β)-metric F which satisfies F (α; β) = √α(α + β). We prove the existence of invariant vector fields on a homogeneous Finsler space with square-root metric. Then we obtain the explicit formula for the S-curvature and mean Berwald curvature of homogeneous Finsler space with square-root metric. We study geodesics and geodesic vectors for homogeneous squareroot (α; β)-metric.
GEOMETRIC INEQUALITIES FOR CR-SUBMANIFOLDS
Authors: Djorić Mirjana , Rovenski Vladimir
Published: January 2025

We study two kinds of curvature invariants of Riemannian manifold equipped with a complex distribution D (for example, a CR-submanifold of an almost Hermitian manifold) related to sets of pairwise orthogonal subspaces of the distribution. One kind of invariant is based on the mutual curvature of the subspaces and another is similar to Chen’s δ-invariants. We compare the mutual curvature invariants with Chen-type invariants and prove geometric inequalities with intermediate mean curvature squared for CR-submanifolds in almost Hermitian spaces. In the case of a set of complex planes, we introduce and study curvature invariants based on the concept of holomorphic bisectional curvature. As applications, we give consequences of the absence of some D-minimal CR-submanifolds in almost Hermitian manifolds.
THE GEOMETRICAL PERSONALIZATION OF HUMAN ORGANS 3D MODELS BY USING THE CHARACTERISTIC PRODUCT FEATURES METHODOLOGY
Authors: Vitković Nikola M. , Radović Ljiljana M. , Stojković Jelena R. , Miltenović Aleksandar V.
Published: January 2025

Computer-Assisted Surgery (CAS) involves applying various computer-based methodologies and devices to plan, guide, and perform surgical procedures, thereby improving outcomes throughout the surgical process. This study integrates the Characteristic Product Features (CPF) methodology with Method Of anatomical Features (MAF), both developed in-house to improve CAS. It enables the creation of the human organs’ geometrical models by including different relations between Regions of Interest (RGIs) models and specific properties, like functional, materials, and topological. Enhancing existing methodologies in CAS aims to offer a more comprehensive geometrical description of human organs, leading to the development of more precise and anatomically accurate personalized geometrical models. Creating customized geometry with accurately defined features is expected to enable surgeons to prepare and execute surgical interventions better, consequently improving patient care and recovery. The demonstration of successful geometry adaptation is shown by prototyping developed models using 3D FDM printing.
NEW EXAMPLES OF GEODESIC ORBIT NILMANIFOLDS
Authors: Nikonorov Yurii G.
Published: January 2025

In this paper we discuss properties of geodesic orbit Riemannian metrics on nilpotent Lie groups and some recent examples of such metrics. In particular, we explain the construction of continuous families of pairwise non-isomorphic connected and simply connected nilpotent Lie groups of dimension 4k + 6, k ≥ 1, every of which admits geodesic orbit metrics.
HOPF REAL HYPERSURFACES IN S6(1) WHOSE STRUCTURE JACOBI OPERATOR IS OF CODAZZI TYPE
Authors: Kocić Djordje
Published: January 2025

We prove the non-existence of Hopf real hypersurfaces in the nearly Kahler sphere S6(1) whose structure Jacobi operator is of Codazzi type.
UNVEILING GENDERED SCRIPTS ABOUT BASIC EMOTIONS AND THEIR IMPLICATIONS
Authors: Pejičić Marija
Published: January 2025

This paper explores the complex relationship between cultural norms and gender differences in emotionality, specifically regarding basic emotions. Examining the bio-psycho-social model, the review focuses on socialization practice and situational contexts converging to produce gendered patterns of emotionality. The review further analyzes the implications of gendered emotional schemas and scripts on human functioning. It is argued that while women are often perceived as more emotional, this perception is largely rooted in expressiveness rather than emotional experience. Further, the paper explores interpersonal dynamics, which might be related to these gendered norms, with women generally displaying greater emotional sensitivity and expressiveness, particularly in contexts that value emotional interdependence. This is contrasted with the cultural pressure on men to conform to traditional masculine ideals, which often discourages emotional expressiveness, particularly in public settings. The potential mental health implications of these gendered emotional patterns are also explored, suggesting that women’s greater emotional engagement and reliance on social support may enhance their well-being. The review concludes by underscoring the importance of continued research to further understand the causal links and underlying processes that contribute to these gender differences.
THE (IN)COMPATIBILITY OF THE ECOLOGICAL MODERNIZATION THEORY AND CONSUMER SOCIETY
Authors: Radmanović Duška
Published: January 2025

Ecological modernization theory is an approach that seeks to reconcile environmental conservation with economic development and technological progress. The theory suggests that environmental problems can be solved by adopting cleaner technologies, increasing resource efficiency and applying environmental regulations. One of the key aspects of ecological modernization is the belief that economic growth and environmental protection can go hand in hand. Proponents argue that through technological progress and the development of environmentally friendly industries, societies can achieve both economic prosperity and environmental sustainability. Some of the biggest weaknesses of the theory are insufficient consideration of consumption and the growing consumerism of today's consumer society, as well as the lack of perspective for developing countries that have experienced significant industrial development in the last two decades.
A DILEMMA FROM THE AUSTRIAN CONQUEST OF NIŠ (1689): IS VOJNIK HILL ACTUALLY VINIK OR GOLA ČUKA?
Authors: Ranđelović Milan
Published: January 2025

The insufficient representation of certain topics in local history may cause the results of scientific research that was not thoroughly conducted to be accepted as indisputable facts. This has a disastrous effect on the discovery of new scientific truths, because compromised but entrenched opinions can mislead future researchers of a particular problem. Such is the case with the role of Vojnik hill in the Austrian conquest of Niš in 1690 and its identification with the Vinik hill represented by Radmila Tričković in the chapter “Niš u velikom ratu” (Istorija Niša I, 1983). As this research used a larger body of sources than R. Tričković used in her reconstruction of this event, we will point out the unsustainability of the Vojnik–Vinik theory, the clues that led R. Tričković to a wrong conclusion and provide a documented explanation of the theory about the identification of the toponyms Vojnik with Gola Čuka hill (Lisinac).
THE ELECTRONIC MUSICAL UNIVERSE OF THE COMPOSER DIMITRIJE BUŽAROVSKI
Authors: Jordanoska Trena , Kolarovska-Gmirja Viktorija
Published: January 2025

The eighth book of the automusicological project of the composer Dimitrije Bužarovski delves into the innovative world of his electronic and computer music. This analysis navigates in-depth Bužarovski’s pioneering use of electronic and computer instruments, from synthesizers and MIDI recording techniques, to Sample Cell Software, and Capybara/Kyma system, highlighting his evolution as a composer from the 1980s to the early 2000s. The book uncovers Bužarovski’s creative process, from conceptualization to performance, shedding light on his unique approach to sonic exploration and thematic development. Through meticulous examination of individual compositions, including ballets Trains and Snow White, the Enneads, SynthSon, and incidental music, the book unveils the intricacies of Bužarovski’s musical language, technical expertise, aesthetic vision, and the profound impact of his electronic innovations on the broader landscape of Macedonian music.
THE CREATION OF A WORK OF ART AND THE METHOD OF SERIAL REPRODUCTION OF GEOMETRIC STIMULI
Authors: Milićević Nebojša , Đorđević Milica
Published: January 2025

Bartlett's serial reproduction experiments (Bartlett 1932), in addition to cognitive and social psychology, find their application in research into changes in culture and art. The application of similar techniques such as Cadavre exquis (Exquisite corpse) in modern art is discussed. Starting from Martindale's idea that serial reproduction experiments can be used to examine and simulate real stylistic changes, it was hypothesized that they could also be applied in examining the genesis of a work of art. Experimental research was conducted in two phases. In the first one, students of the Faculty of Arts (N=30) reproduced three geometric stimuli using the method of group serial reproduction with the instruction to increase originality in ten stages. Thus, 30 stimuli were obtained for further research. In the second part, psychology students (N=270) gave aesthetic evaluations of reproductions on the scales of semantic differential. The results of the liking (ND) and artistic evaluation (UV) scales were discussed in the paper. The qualitative and quantitative analysis of the results shows that the transformations went in the direction of rationalization and emphasis, but not in the work of simplification. The growth trend of ND and UV was recorded as a function of reproduction phases. Thus, the initial hypotheses of the research were confirmed. Later reproductions in the series scored higher on these scales. Psychology students show consistency in their judgments of liking and artistic value, which may indicate their appropriate aesthetic taste. In subsequent research, it should be checked whether aesthetic patterns and preferences differ between subjects with artistic education and those without such education. It is also necessary to include experiments of individual serial reproduction with the instruction of increasing originality in order to more faithfully simulate the process of creating a work of art.
THE IMPACT OF ART ON TEACHING ENGLISH TO BACHELOR STUDENTS OF ARCHITECTURE
Authors: Janković Ljiljana
Published: January 2025

The study has two main goals: to determine the students’ knowledge of and interest in visual arts (painting), considering the nature of the respondents’ bachelor studies of architecture, and to determine whether the implementation of a creative activity based on well-known paintings into their English classes can enhance their writing skills in this language. Therefore, research was conducted including 21 bachelor students of architecture at the Faculty of Civil Engineering and Architecture, University of Niš who selected English as their elective academic course in the first year of study. They participated in this empirical research during the spring semester of the academic year 2023/2024. The study analyzed the participants’ language performance, particularly their writing skills, and their knowledge of the paintings used in this experiment. Regarding the analysis of the participants’ language skills, five grammatical and lexical points were studied. Moreover, the results of their knowledge of art are shown. The obtained results show that the participants performed better when exposed to the visual stimuli (paintings) and that they constructed grammatically correct sentences when using the vocabulary related to their field of study. The obtained results might be useful for devising the EFL teaching materials aimed at tertiary-level students of architecture to include not only the practice of English grammatical structures, but also the reading practice of the original English texts. Thus, the students would be able to observe and understand these structures in meaningful contexts.
ANALYSIS OF FEMALE PORTRAITS FROM DIFFERENT PAINTING STYLES BY PABLO PICASSO IN LIGHT OF COGNITIVE THEORY OF AESTHETIC DECISION-MAKING
Authors: Đorđević Milica
Published: January 2025

The issue of this study was to examine whether aesthetic evaluations of female portraits from various painting periods in Pablo Picasso's oeuvre differ in terms of dimensions: harmony (H), ornamentation (R), and distance (D). Additionally, this study investigates the trends of aesthetic evaluations over time and whether they correspond to the assumptions of the cognitive theory of aesthetic decision-making. The study involved 55 emerging adults (M = 23.9, SD = 2.46). The stimulus material consisted of 16 female portraits belonging to Picasso's blue period, rose period, analytic cubism, and synthetic cubism. We used scales to measure H, R and D dimensions of aesthetic decision-making (Pejić 2006, 2007; Pejić & Milićević 2007). One-way ANOVA results indicated statistically significant differences in the expression of H dimension (F (3,876) = 79.28, p = .000, ŋ2 = .230), R dimension (F (3,876) = 22.49, p = .000, ŋ2 = .079), and D dimension (F (3,876) = 6.38, p = .000, ŋ2 = .026) depending on Picasso's artistic period. Likewise, trends in aesthetic evaluations of female portraits from different periods of Picasso's oeuvre over time were examined. The results showed a statistically significant trend that resembled the trend expected, depending on the aesthetic dimension in question.Keywords: H dimension, R dimension, D dimension, female portraits, Pablo Picasso
APPLICABILITY OF TRADITIONAL SONGS OF THE KOSOVO-POMORAVLJE DISTRICT IN SOLFÈGE TEACHING
Authors: Janković Nikola , Nikolić Igor
Published: January 2025

Traditional songs are an important aspect of cultural heritage, and consequently an element of local community identity. Bearing in mind the importance of preserving traditional values, the paper explores the possibilities of using traditional songs of the Kosovo-Pomoravlje district in primary music schools solfège teaching. The paper first focuses on the phenomenon of Serbian folk singing and analyzes the cultural context, as well as the specificities of the Kosovo-Pomoravlje folk songs and their classification. Later in the text, the focus moves to the specific possibilities and methodical instructions for the use of the Kosovo-Pomoravlje songs in solfège teaching. The goal of the research is to show how the use of those songs can improve the pedagogical approach to solfège teaching, based on interactive implementation of teaching tasks, contributing, on the one hand, to the understanding and adoption of elements of musical literacy with the further development of musical skills and knowledge and, on the other hand, to the familiarization with the cultural heritage and its preservation.
METHODOLOGY FOR UNCERTAINTY ESTIMATION OF SHORT-TERM TOTAL ENVIRONMENTAL NOISE MEASUREMENTS
Authors: Praščević Momir , Mihajlov Darko , Jovanović Petar
Published: January 2025

The third edition of the ISO 1996 series describes the methods for measuring and assessing environmental noise from different noise source types (road, rail and air traffic, and industrial plants). Additionally, these standards provide guidelines for assessing the uncertainty of short-term and long-term environmental noise measurements, considering the impact of various sources of uncertainty. The procedure described for assessing measurement uncertainty refers to the specific noise of individual noise sources (road, rail and air traffic, and industrial plants) and cannot be directly applied when considering the total noise contributed by multiple, diverse, near and far sources in each situation at a specific time, along with the corresponding measurement uncertainty. The limit values of the noise indicators specified by the Serbian regulations refer to the total noise, so it is necessary to determine the noise indicators for the total noise to assess environmental noise in each situation and at a given time. Although Serbian legislation does not require the use of measurement uncertainty in environmental noise assessments, the uncertainty must be determined and reported in the measurement report according to the requirements of the third edition of the ISO 1996 series. This paper aims to provide a detailed procedure for assessing the uncertainty of total environmental noise measurements for individual noise in the context of Serbian legislation and the third edition of the ISO 1996 series. The presented procedure can also be applied in other countries where noise limit values refer to total noise.
PROPOSAL OF THE RULE FOR RATING LEVELS OF INDUSTRIAL IMPULSIVE NOISE REGARDING THE RISK OF HEARING DAMAGE
Authors: Miočinović Jovan
Published: January 2025

Since the release of the core standards for determining occupational noise exposure, ISO 1999:2013 and ISO 9612:2009, adjustments for noise types that were previously thought to have additional damaging effects of noise uneven in the time and frequency domain have been left out when rating noise levels in the workplace. Recent literature as well as models of the effect of noise on hearing indicate a particularly damaging effect of impulsive noise. At the same time, the regulation requires consideration of the type of noise, including any exposure to impulsive noise. This paper proposes a rule for rating that would reduce the risk of hearing damage arising from disregarding the impulsive nature of noise.
CASE STUDY: PREDICTION OF THE EFFECT OF PERFORMED ACOUSTIC INSULATION ON MACHINE PARTS ON REDUCING OCCUPATIONAL NOISE EXPOSURE
Authors: Beljić Durković Biljana , Miočinović Jovan
Published: January 2025

In the plastic injection moulding plant, at the operator’s position at the machine, the noise was measured in situ before and after the acoustic insulation lining of the parts of the machine to determine whether the intervention has an impact on reducing occupational noise exposure. As the work environment is variable (different modes of operation of the machine and other machines in the plant), a model of the contribution of the noise sources to the measured noise was made, and based on the model, the effect of the intervention was predicted.
NONLINEAR VIBRATION OF A BEAM SUBJECTED TO MECHANICAL IMPACT AND WINKLER-PASTERNAK FOUNDATION
Authors: Herisanu Nicolae , Marinca Bogdan , Marinca Vasile
Published: January 2025

The simultaneous effects of mechanical impact and Winkler-Pasternak foundation on the dynamic response of an Euler-Bernoulli beam are studied. By means of the Galerkin-Bubnov procedure, the governing equation with partial derivatives is reduced to an ordinary differential equation. This nonlinear equation is solved by means of the Optimal Homotopy Asymptotic Method (OHAM).
ENSURING AN ACOUSTICALLY UNPOLLUTED LIVING ENVIRONMENT
Authors: Bacria Vasile , Herisanu Nicolae
Published: January 2025

Human beings are always concerned with living in an unpolluted environment. Noise pollution is one type of pollution that can arise. To address this issue, the acoustic properties of the environment are studied. This is done through periodic measurements, identifying the sources of pollution at the same time. The impact on the environment is then evaluated based on the collected data. Based on this, pollution reduction measures are established, and measures to reduce pollution are implemented accordingly. The methodology, measurement procedures, development of reduction strategies, and their effectiveness are thoroughly outlined.
MULTI-SLOPE ENERGY DECAY CURVES GENERATED BY MOVING AVERAGE APPROACH
Authors: Janković Marko , Ćirić Dejan , Puljizević Maro , Pantić Aleksandar
Published: January 2025

Sound energy decay is typically represented by an energy decay curve (EDC), which depicts the decrease in sound energy over time after the sound source in a room is turned off. In spaces with single-slope decay, the EDC appears as a straight line. Such curves can be analyzed using linear regression to calculate parameters such as reverberation time. However, due to factors like room geometry, absorption, and other effects of sound transmission in enclosed spaces, an EDC may exhibit multi-slope decay. When linear regression is applied to such a curve, the results depend heavily on the range over which the curve is approximated by a straight line.This paper analyzes EDCs generated using the moving average approach, based on impulse responses measured in two rooms: a reverberation chamber and a classroom. The focus is on multi-slope EDCs and a comparison between moving average EDCs and those generated using the Schroeder backward integration method. The moving average EDCs exhibit a greater dynamic range than the Schroeder-integrated EDCs, revealing the final part of the reverberation decay, which is obscured in the latter due to the cumulative summation of background noise.
THE POLAR CHARACTERISTIC OF AN ACOUSTIC PARABOLIC REFLECTOR
Authors: Stojanović Violeta , Milivojevic Zoran
Published: January 2025

The first part of the paper presents the geometry of the acoustic parabolic reflector. After that, analytical formulas for calculating the amplification and polar characteristics of the reflector are shown. The second part of the paper describes the experiment in which measurements were made and the acoustic characteristics of the parabolic reflector located in the yard of the Academy of Applied Technical and Preschool Studies, Department of Niš, in Niš were calculated. First, acoustic impulse responses for acoustic excitation at angles from -90° to 90° were measured. After that, the polar characteristic of the radiation was calculated. Finally, the beamwidth of the radiation, beam solid angle of the radiation, and directivity of the acoustic parabolic reflector were determined. The results of the experiment are presented numerically and graphically.
NOISE LEVEL MEASUREMENTS OF ROAD TRAFFIC AT DIFFERENT HEIGHTS IN RELATION TO THE NOISE SOURCE
Authors: Boljević Danica , Milenković Aleksandar , Savković Damir
Published: January 2025

The paper provides an analysis of the results of noise levels originating from road traffic measured at different heights on the example of an eighteen-story solitaire in the Dušanovac, which is located along the traffic road Bulevar Franše d'Eperea in Belgrade (the former section of the E-75 Belgrade-Niš highway). Measurements were made simultaneously at three measuring points, on the second, tenth and eighteenth (last floor) of the solitaire.
EFFECTIVENESS OF THE CONSTRUCTION OF SOUND BARRIERS ON TWO HIGHLY BUSY ROADS IN BELGRADE
Authors: Savković Damir , Milenković Aleksandar , Boljević Danica , Baralić Stevka
Published: January 2025

The application of sound barriers is considered to be one of the important environmental and occupational noise protection measures, especially when it comes from noise sources such as road traffic. It represents a secondary measure of noise protection, because it is applied on the path of propagation of sound waves from the sound source to the place of immission, while the primary measure is applied at the source itself or its immediate surroundings. In this case, the place of immission is the place where a person resides as the main subject of noise protection. In this paper, the efficiency of this application of protection is discussed on the example of two sections of extremely busy traffic roads in Belgrade: a) Arsenija Čarnojevića Boulevard along UHMC Bežanijska kosa (former section of highway E-70 Belgrade-Zagreb) and b) Franše d'Eperea Boulevard along the building of the City Institute for Medical Emergency (former section of the E-75 Belgrade-Niš highway).
STRATEGIC NOISE MAP FOR BELGRADE NIKOLA TESLA AIRPORT
Authors: Ganić Emir , Gajicki Aleksandar , Mirković Bojana , Sindik Matija
Published: January 2025

Environmental noise management is a critical aspect of public health policy, particularly within the European Union, which established Directive 2002/49/EC to standardize noise assessment and mitigation efforts across member states. Serbia has integrated the Directive's provisions through its Law on Environmental Noise Protection and accompanying by-laws. This paper presents the strategic noise mapping process for Belgrade Nikola Tesla Airport, Serbia's largest international airport, marking a significant milestone as it is the first time a strategic noise map is being developed for a major airport in Serbia. The legal framework, methodology, and results of this mapping process are discussed in detail. Utilizing the CNOSSOS-EU:2015 method and the Aviation Environmental Design Tool (AEDT) for acoustic calculations, the study defines the affected areas, noise indicators, and population exposure based on 2023 air traffic data. The results indicate that the Lden noise levels exceeding 55 dB impacted 24,223 residents, while the Lnight noise levels exceeding 50 dB affected 7,493 residents. The analysis also includes the estimated number of dwellings, schools, hospitals, and people affected by different noise levels, providing necessary data for developing action plans aimed at mitigating noise pollution. Additionally, the study examines the potential health impacts, including population annoyance and sleep disturbance, using dose-effect relationships as defined by the European Commission. The results underline the importance of ongoing noise monitoring and the need for timely revisions of strategic noise maps and action plans to ensure compliance with both national and EU regulations. This research contributes to the broader effort of environmental noise management, offering insights into the methodologies and challenges of strategic noise mapping for airports in Serbia.
MODELS FOR PREDICTING SOUND ABSORPTION OF POROUS MATERIALS
Authors: Radičević Branko
Published: January 2025

Porous materials are widely used in the field of noise control. The acoustic properties of these materials are best characterized by the sound absorption coefficient, which can be predicted using different mathematical models presented in this paper: empirical, phenomenological, and statistical. Optimization models based on biologically inspired algorithms were used to determine the non-acoustic parameters of the acoustic models. In addition to mathematical models for predicting acoustic parameters of porous materials, the paper also presents models for identifying non-acoustic parameters that are input parameters of empirical and phenomenological models. Air flow resistance is one of the most significant non-acoustic parameters of porous materials, and its values shown in this paper were measured according to the SRPS EN ISO 9053-1:2019 method. In empirical models, resistance to airflow is the only input parameter, while in phenomenological and optimization models it is one of several input parameters that establish a connection between microstructure and acoustic properties of porous materials. Based on the experimental values of the sound absorption coefficient, the non-acoustic parameters of the phenomenological models were determined using biologically inspired optimization algorithms. Statistical models are based on ANOVA analysis and determination of the sound absorption coefficient's dependence on the material layer's thickness and frequency. Predictions of the sound absorption coefficient of open-cell polyurethane foam were determined using the above models and are compared with pipe impedance measurements. In this way, the accuracy of the prediction of mathematical models for determining sound absorption was established. In addition, this research shows that low-density open-cell polyurethane foams have good sound absorption performance over a wide frequency range, and as such can be used for noise protection.
OPTIMIZATION OF NON-ACOUSTIC PARAMETERS OF FIBROUS MATERIALS USING BIOLOGICALLY INSPIRED ALGORITHMS
Authors: Dulović Tanja , Radičević Branko , Bjelić Mišo , Ivanović Marina
Published: January 2025

This paper deals with the optimization of the acoustic properties of samples made of fibrous materials, using biologically inspired algorithms. Samples with a thickness of 10 mm were tested, and the results showed that cotton fibers bonded with polyurethane resin have excellent absorption properties in a wide frequency range. GWO, BW and Puma were used for optimization. The optimization results showed significant improvements in the acoustic properties of the material, opening up possibilities for further application in sound insulation and other relevant areas.
SENSING WITH SOUND: IMPROVING GASES AND SOLID ANALYSIS BY PHOTOACOUSTIC SPECTROSCOPY
Authors: Lukić Mladena , Đorđević Katarina , Ćojbašić Žarko , Markushev Dragan
Published: January 2025

The development of photoacoustic spectroscopy is being driven by the growing demand for precise, efficient, and reliable detection methods that can be used for in situ measurements and real-time monitoring. Along with rapid technological progress, photoacoustic spectroscopy became an ultra-sensitive, selective, cost-effective technique that can meet the demanding requirements for environmental monitoring, industrial safety, and medical diagnostics. This paper highlights how continuous improvements in photoacoustic technologies, including the use of appropriate laser sources as well as sensing elements, and machine learning methods, are pushing the limits of gases and solid analysis and providing critical tools for addressing modern scientific and industrial challenges.
A REVIEW OF BIG DATA ANALYTICS IN TEACHING ENGLISH AS A FOREIGN LANGUAGE
Authors: Naidu Vikas Rao , Abul Khair Delowar , Al Jabri Abdul Malik , Udupi Prakash Kumar
Published: January 2025

The emergence of large corpora built from collections of human language, especially when integrated into artificial intelligence-driven systems, has created new opportunities for language teaching and learning, even though data collection and analysis in computer-assisted language learning is nothing new. Amazing linguistic talents are currently being generated by artificial neural networks. When working with large data sets, the education sector is progressively gaining popularity thanks to the use of data mining tools. Data from online educational platforms and the current ability to quickly gather, store, manage, and process data present an opportunity for educational institutions, students, teachers, and researchers. Numerous uses of big data exist in language learning, such as the real-time tracking and analysis of learner behavior, the creation and modification of teaching resources and techniques, and the enhancement of equational systems and rules. This position paper explores the application of big data in language learning and looks at several key ideas along with the most widely used instruments, approaches, and strategies in learning analytics and educational data mining. The methodological foundation of this study was the comprehensive literature review procedure. The value of data analytics in teaching English as a second language is assessed in three distinct scenarios. A tailored framework in the form of a process diagram has been suggested by the authors for English language learners whose mother tongue is Arabic.
NEGOTIATING HIERARCHY: A CRITICAL PERSPECTIVE ON ENGLISH FOR SPECIFIC PURPOSES IN HEALTHCARE
Authors: Shanavas Shahanas Punnilath , Singh Seema , Vargheese K.J.
Published: January 2025

Although English is widely regarded as the medium of communication in India's hospitality and tourism sectors, English for Specific Purposes (ESP) has been largely overlooked in academic or occupational spaces. Despite facing an unprecedented shortage of healthcare workers following a new wave of mass migration, India is one of the top favored destinations for medical tourism worldwide. The present paper aims to critically explore and comprehensively understand the linguistic needs of nurses in the state of Kerala, India. Additionally, the paper investigates the impact of India's migration patterns on the use and changing perception of English in healthcare settings. It considers how these factors influence the role of language within the medical context and the lives of nurses. Critical analyses reveal the prevalence of generalized language training and inconsistencies in the perception of needs between two levels of stakeholders. This qualitative inquiry magnifies the transformative potency of the English language in conferring agency upon the marginalized nursing demographics within the Indian healthcare milieu. As such, it staunchly champions the imperative formulation and execution of a meticulously customized ESP program, serving as an instrumental catalyst for engendering empowerment and emancipation.
MOTIVATING POTENTIAL OF PROFESSIONALLY-ORIENTED FOREIGN LANGUAGE PROJECT ACTIVITIES
Authors: Borodina Tatiana Yurievna , Nikolaeva Nataliya Sergeyevna
Published: January 2025

The paper examines the issues of using project-based learning in teaching foreign languages (FL) at the Bauman Moscow State Technical University, as a combined educational strategy with high potential for creating a favorable educational environment and promoting students’ involvement in the educational process. The aim of the research is to develop effective methodological procedures using a differentiating approach to teaching students with different levels of foreign language competence, various psychological and motivational attitudes, and inclinations. To achieve this goal, we developed and implemented a number of methods based on project strategies as part of the FL course and conducted a survey aimed at identifying changes in motivation to learn languages. A team role assignment technology has been designed and described in detail for the project “Production in Space” with an eye to its potential use in other projects. The principle of changing functional roles for subsequent project works has been embodied in the role change matrix.
RESEARCH PROPOSAL: INVESTIGATING EFFECTIVENESS OF TRAINING VIDEOS ON MEDICAL PROFESSIONAL COMMUNICATION – RELYING ON SFL ANALYSIS AND POLITENESS THEORY
Authors: Kerničan Leontina , Stojković Nadežda
Published: January 2025

The proposal aims to document whether training videos on medical professional communication may be effective in identifying and improving the communication skills of doctors and other healthcare practitioners with patients. The strategy may be of particular importance for LSP students, medicine students, or pharmacy students who are non-native English speakers. After following a typical educational video, and based on their knowledge of communication in healthcare, they will need to identify the key semiotic resources that develop assertiveness and empathy in communication. The investigation should rely on SFL, with an emphasis on speech act theory and politeness theory.
LANGUAGE PLANNING AND ITS EFFECTS ON POSTFOUNDATION STUDENTS’ PROFICIENCY IN INCLUSIVE VOCATIONAL TRAINING ENVIRONMENT
Authors: Zghidi Dalinda
Published: January 2025

The aim of this study is to examine language planning and its potential impact on students’ learning experiences in Omani vocational colleges that support inclusive learning environment in the context of English as Medium of Instruction (EMI). In particular, it focuses on the barriers to learning that Salalah Vocational College post foundation students experience when faced with studying technical English or English for vocational purpose (EVP). Data were gathered using a three-part questionnaire. The Statistical Package for Social Science (SPSS) was utilized for the statistical analysis, and a descriptive analysis was used to analyze the data. Based on quantitative data collected, post foundation students’ opinion in Salalah Vocational College about EMI and EVP is negative. The study reveals that inadequate English language skills are a significant hindrance to understanding course content and acquiring marketable skills. Students prefer to learn in Arabic due to practical reasons, which calls for reconsideration of language planning policies in vocational institutions. Using the native language as the medium of instruction can help students understand the concepts and skills needed to prepare them for the labor market. By overcoming linguistic barriers, the scope for integrating a group of individuals with special needs becomes open. It also becomes conceivable to discuss inclusive education at vocational colleges. Such adjustments would more effectively enable the desired national growth.
Impact of nitrogen fertilization and rootstock genotype on growth and fruit quality of Nules clementine
Authors: Omari Fatima Ezahra , Beniken , Lhou
Published: January 2025

This study focuses on understanding the impact of varying nitrogen rates on the growth, fruit production, and quality of clementine Nules variety trees grafted onto Flhorag and Carrizo citrange rootstocks and cultivated at the Sidi Allal Tazi Experimental Station of INRA Morocco, in clay soil, over five seasons. A split-plot design with three blocks of repetitions (two trees per bloc per treatment, n=6) was employed in this experiment. The main plot varied the nitrogen doses, while the subplot involved the genotype of rootstock. Three fertilizer treatments with N rates (T0: control (native nutrient), T1: 270, T2: 540 in g/tree), with 135 P2O5 and 270 K2O g/tree added to citrus trees. The research indicated that both nitrogen rate and rootstock genotype significantly influenced vegetative growth, yield, and fruit quality of Nules clementine. Increased nitrogen levels enhance vegetative growth, especially in Carrizo citrange rootstock, evidenced by greater tree height, canopy diameter, and volume. Significant and positive correlation was found between canopy volume and fruit yield, across both rootstock highlighting the importance of proper nitrogen management in citrus cultivation. Carrizo citrange was proved to be a more efficient rootstock for Nules variety in contrast to tetraploid Flhorag. Higher nitrogen rates with Carrizo citrange result in better yield and fruit quality (size, juice content, and solid soluble content) than with tetraploid Flhorag. Optimal yield and fruit quality in Nules clementine are achieved using 540g of N/tree/year when grafted on Carrizo citrange. The recommended NPK rate for achieving high yield and optimal fruit quality of Nules clementine was 540 N-135 P2O5-270 K2O g/tree/year.