bluuebunny/crossref_metadata_2025 huggingface dataset:
Towards a community-driven definition of community wellbeing: A qualitative study of residents
Authors: Michalski Camilla , Ragunathan Apira , Foster Adrian , Pagalan Lief , Chu Casey , Diemert Lori M. , Helliwell John F. , Urajnik Diana , Speidel Ruth , Malti Tina , Fierheller Dianne , Fusca Laura , Zenlea Ian , McKean Scott , Rosella Laura C.
Published: November 2023

Background

Understanding what promotes or hinders a community’s capacity to serve the priorities of its residents is essential for the alignment of citizen needs and governance. Participatory approaches that engage community residents on the topic of community wellbeing are useful methods for defining outcomes that reflect a community’s goals and priorities. Using qualitative focus group methods, the aim of this study was to outline bottom-up definitions of community wellbeing from a diverse pool of community residents in Ontario, Canada.

Methods

Semi-structured, two-hour group interviews were conducted with adult (≥18 years) participants (N = 15) residing in four communities across Canada’s largest province of Ontario. Participants were purposively selected from a pool of screening questionnaires to ensure diverse group compositions based on race, gender, age, and educational attainment. Interviews were thematically analysed using descriptive and interpretive methods to characterize resident conceptions of community wellbeing.

Results

Focus group participants were between 18 and 75 years of age and most had lived in their local community for 5 or more years. Four major themes emerged: (1) a sense of community belonging is cultivated through shared spaces, routines, support, and identities; (2) a community constitutes the amenities and social contexts that enable residents to thrive; (3) effective regional decision-making must be community-informed; and (4) the wellbeing of a community relies on equal opportunities for engagement and participation.

Conclusions

Residents described their communities and their associated wellbeing as a combination of accessible amenities and opportunities to engage without marginalization. This study underscores the value of participatory approaches in community wellbeing research, where the viewpoint and life experience of residents is used to inform local decision-making and service delivery. Future research will capture more diverse perspectives towards community belonging, particularly from community newcomers, for the development of regionally appropriate indicators of community wellbeing.
Protein kinase PfPK2 mediated signalling is critical for host erythrocyte invasion by malaria parasite
Authors: Rawat Rahul Singh , Gupta Ankit , Antil Neelam , Bhatnagar Sonika , Singh Monika , Rawat Akanksha , Prasad T. S. Keshava , Sharma Pushkar
Published: November 2023

Signalling pathways in malaria parasite remain poorly defined and major reason for this is the lack of understanding of the function of majority of parasite protein kinases and phosphatases in parasite signalling and its biology. In the present study, we have elucidated the function of Protein Kinase 2 (PfPK2), which is known to be indispensable for the survival of human malaria parasitePlasmodium falciparum. We demonstrate that it is involved in the invasion of host erythrocytes, which is critical for establishing infection. In addition, PfPK2 may also be involved in the maturation of the parasite post-invasion. PfPK2 regulates the release of microneme proteins like Apical Membrane Antigen 1 (AMA1), which facilitates the formation of Tight Junction between the merozoite and host erythrocyte- a key step in the process of invasion. Comparative phosphoproteomics studies revealed that PfPK2 may be involved in regulation of several key proteins involved in invasion and signalling. Furthermore, PfPK2 regulates the generation of cGMP and the release of calcium in the parasite, which are key second messengers for the process of invasion. These and other studies have shed light on a novel signalling pathway in which PfPK2 acts as an upstream regulator of important cGMP-calcium signalling, which plays an important role in parasite invasion.
Anàlisi ecofeminista de Canto jo i la muntanya balla d’Irene Solà
Authors: Sánchez-Ballester Raül
Published: November 2023

Un dels principals objectius de l’ecofeminisme és conscienciar la societat de la crisi ecològica i el sexisme, atés que fan perillar la supervivència dels éssers vius i de la natura. Canto jo i la muntanya balla és una novel·la d’Irene Sola que pot ser analitzada des d’aquesta perspectiva per la gran diversitat de veus narratives gràcies a l’aplicació del concepte d’heteroglòssia de Bakhtín. L’autora dona veu a éssers que, tradicionalment, han estat silenciats per la societat antropocèntrica i androcèntrica com ara les dones, els animals i la natura. A més, cal remarcar que totes aquestes veus tenen la mateixa importància per al desenvolupament de la història. Pel que fa a les veus dels personatges femenins, convé remarcar que són molt diferents entre elles i ens aporten diverses perspectives d’entendre les relacions, la maternitat, la sexualitat i l’entorn que els envolta. Així mateix, el folklore i l’etnopoètica tenen una gran importància en la novel·la perquè una de les narradores és una dona d’aigua i els personatges fan ús de les llegendes per a entendre l’entorn natural o per a distreure’s del dolor i les desgràcies per uns moments. Un altre cas significatiu és el de Cristina que critica l’exclusió de les dones de tradicions com ara la festa de l’os de Prats de Molló. D’altra banda, els animals i la natura també són narradors gràcies al mecanisme de la imaginació empàtica de Randy Malamud. Tocant als animals, cal remarcar el capítol narrat per Lluna, la gossa de Mia, per l’estreta relació que manté amb ella i la narració del part d’un cabirol en comparació a la narració que fa la dona d’aigua d’un part humà. Finalment, convé fixar-se en els vincles entre les veus narratives i els personatges de l’obra perquè exemplifiquen les dues dependències humanes: la interdependència i l’ecodependència.
Representaciones de África en algunas autoras oesteafricanas del siglo XXI
Authors: Montes Nogales Vicente Enrique
Published: November 2023

Este artículo tiene como objetivo principal analizar las representaciones de algunos países de África occidental en la producción literaria de cuatro autoras francófonas originarias de Mali o Senegal que han residido en Europa durante algún tiempo o se han asentado definitivamente en ese continente. La distancia geográfica y el descubrimiento de nuevas realidades les permite valorar o juzgar negativamente determinados fenómenos y particularidades africanos y europeos. La identidad de estas ciudadanas cosmopolitas se conforma a medida que se familiarizan con las culturas y costumbres de los diversos pueblos, rechazando algunas de estas últimas y mostrándose abiertas a otras. La observación de nuevas circunstancias y modos de vida, junto a la adquisición de conocimientos les permite reivindicar con más criterio aquellos derechos que por justicia corresponden a los individuos, desde ámbitos tan variados como el asociativo, el político o la escritura literaria.
Regreso a la casa de la infancia: la reconstrucción del pasado y de la identidad en Maison-Mère de Anaïd Demir
Authors: Muñoz Carrobles Diego
Published: November 2023

La escritora francesa de origen armenio Anaïd Demir publicó en 2022 la novela Maison-Mère (‘Casa-madre’, en español), de clara inspiración autobiográfica. En esta obra la autora se enfrenta a su identidad multicultural y políglota, hija de armenios de Turquía emigrados a Francia en los años 60 del siglo pasado, y a los recuerdos del pasado en una casa situada en una pequeña ciudad de las afueras de París, a la que regresa en un difícil momento personal. En este trabajo analizaremos la novela, en primer lugar, desde el punto de vista espacial, a través de los diferentes significados y funciones que posee el espacio de la casa. A continuación, examinaremos el papel de la madre como desencadenante de la narración, así como de otros personajes femeninos. Finalmente, veremos cómo se integra la identidad armenia gracias a la lengua y al reconocimiento del legado familiar.
A vállalatok értékteremtőinek empirikus vizsgálata a válságok
vonatkozásában
Authors: Kiss Anita , Darabos Éva , Béresné Mártha Bernadett
Published: November 2023

A tanulmány fő célja, hogy választ adjon a következő kérdésekre:
melyek azok a tényezők, amelyek befolyásolják a cégek értékteremtését, és
hogyan alakul e tényezők befolyásoló ereje a 2019-es koronavírus válság
utóhatásainak fényében. Kutatásunkban a felállított hipotézisek
érvényességét a rendelkezésre álló adatbázis felhasználásával panel
regressziós modellel vizsgáltuk. A cikk felépítése a következő. Először a
vállalati értéket meghatározó tényezőket azonosítja a feldolgozott
jelentősebb szakirodalmak alapján. A következő részben a 2007-2008-as
globális pénzügyi válság és a COVID-19 válság jellemzőit, okait,
jelentősebb válságepizódjait írja le. Ezután tér át az empirikus részre,
melyben először a korábban megjelent, a témához kapcsolódó empirikus
kutatásokat és azok eredményeit mutatja be, majd a saját empirikus
vizsgálathoz használt adatbázist jellemzi. A panel regressziós modell és az
alkalmazott módszer ismertetése után az elvégzett empirikus vizsgálatokat
és azok eredményeit közli, végül a következtetéseket fogalmazza meg.
Munkával kapcsolatos attitűdök vasútszakmai oktatók körében
Authors: Farkas Attila , Filep Roland , Dajnoki Krisztina
Published: November 2023

Az elmúlt évtizedekben egyre nagyobb figyelem szegeződik az
oktató-hallgató kapcsolatra, amely már kisiskolás kortól a felnőttképzés
területéig hatással lehet a hallgatók sikerességére. A stresszmentes
környezet kialakítása a hallgatók mellett az oktatók munkával való
elégedettségére is pozitív hatást gyakorol. Célul tűztük ki, hogy feltárjuk
a vasútszakmai oktatók hallgatókkal való kapcsolatát, részcéljaink között
szerepelt az oktatók szervezethez való viszonyulásának és az oktatói munka
során tapasztalt nehézségeknek az elemzése. A leíró statisztikák és az
esetek számának elemzése mellett fogalomrendszerezést alkalmaztunk. Az
eredmények alapján az oktatók bizakodók és barátságos hozzáállást követnek,
úgy érzik, hogy a hallgatók könnyen bevonhatók az oktatásba. A szakmai
munkában hallgatói részről inkább az ismeretek hiánya jelent nehézséget,
mint a hallgatók hozzáállása. Világosnak találják a szervezet céljait, a
szakma iránti elhivatottság jellemzi őket, nagyra értékelik az összetartó
közösséget, a képzések szervezésével kapcsolatban is inkább elégedettek. A
túlterheltség mellett nehezítő tényezőként jelenik meg a jelenleg működő
vizsgarendszer, az oktatási eszközök hiánya és a szűkösen rendelkezésre
álló idő. A szervezettől valamivel több támogatást várnának a
munkavégzéshez kapcsolódóan. Javasoljuk a szervezet képzési rendszerének
oktatók bevonásával történő újragondolását és az oktatók széleskörűbb,
személyre szabott támogatását.
Media Representations of Islam and Muslims in Indonesia: A Review and Research Direction
Authors: Masduqi Harits , Subiyanto Arif
Published: November 2023

Current political issues related to power struggles in Indonesia are playing a divisive role in the country and escalating religious cases are a common sight. With Muslims dominating the nation's population, Islam inevitably plays a pivotal role in the country's political pageant. Indonesian government claim that they manage to secure moderate Muslims' loyalty to the political system while groups that are labelled as 'intolerant and radical Muslims' by the mainstream media often reject the mainstream democratic interpretations. In light of this situation, it is imperative that studies on factors contributing to the case and discourse strategies used in news and articles in secular and Islamic mass media dictating the current constructions of Muslim and Islamic identities in the country be encouraged.
Application of the Source-Jerk method using a neutron generator in a subcritical reactor
Authors: Rataj Jan , Mátl Jakub , Suk Pavel
Published: November 2023

This paper describes the application of the Source-Jerk method using a neutron generator in the VR-1 reactor. The experiments were carried out on a shutdown reactor with subcriticality greater than -10 βeff. A D-D neutron generator located in the radial channel of the VR-1 reactor was used as an external neutron source for the Source-Jerk method. The obtained results were discussed and compared with a conventional Source-Jerk method used at the VR-1 reactor and with the values calculated by the Serpent 2 code. The presented experimental works and their results will allow to extend the methods of reactivity measurements on the VR-1 reactor. They will also help to optimise reactivity measurements on the new subcritical reactor VR-2, which is currently being commissioned at the Czech Technical University in Prague.
PAPR reduction in CP-OFDM (5G) using hybrid technique
Authors: Yusof Azlan , Idris Azlina , Abdullah Ezmin
Published: November 2023

The Cyclic Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) is a 5G multicarrier waveform that offers great data speeds and improvements in spectrum utilisation. The primary CP-OFDM’s weakness is its excessive peak-to-average power ratio (PAPR), which is a characteristic of all multicarrier modulation techniques. We study the application of a hybrid technique approach how to lower the peak to average power ratio (PAPR) in a CP-OFDM system. We also evaluated the outcomes of peak to average power ratio (PAPR) decrease in CP-OFDM, utilising a hybrid technique with Group Codeword Shift (GCS), Median Codeword Shift, Selective Codeword Shift (SCS), and Conventional CP-OFDM. When compared to the non-hybrid technique, the simulation results indicate that the hybrid approach is superior in reducing the peak PAPR by more than 65 percent.
Does Financial Literacy Influence Houswife Intention To Use The Islamic Financing? With Trust As A Moderating Variable
Authors: Annisa Nur Salam  , Siti Nur Azizah
Published: November 2023

Research Aims: This study aims to analyze the effect financial literacy on the houswife intention to use islamic financing with trust as a moderating variable.
Methodology: This study involved 358 housewife respondent in 32 Indonesian provinces. The model used was based on the theory of reasoned action development with the partial least squares structural equation modeling as the data processing tool.
Research Findings : Housewives' financial literacy influences mothers' intentions to use Islamic bank financing products.
Originality: Although numerous studies have concentrated on financial literacy and the use of sharia financing, the behaviour of houswife and the high number of housewife loans to informal institutions concern academics and practitioners. This research can highlight the importance of financial literacy for housewives can avoid applying for loans to informal institutions, so sharia financing can be a suitable alternative.
Research limitation and implication: The study discovered that financial literacy with variabel ability, attitude and knowledge affect the intention of houswife to use the Islamic financing. Meanwhile, the trust variable failed to moderate the housewife's ability to use Islamic financing. The trust variable was not successful in moderating the attitude and knowledge of the housewife to use Islamic financing. Meanwhile the trust variable significantly moderates the attitude towards the financing variable with a significance
Organization of interphase microtubules and actin filaments in spruce callus cells after glutathione treatment
Authors: Urbanek Andreja , Zechmann Bernd , Zellnig Günther , Muller Maria
Published: November 2023

Changes in the distribution of microtubules (MT) and actin filaments were examined in suspension-cultured spruce cells [Picea abies (L.) KARST.] that were exposed to different concentrations (500 and I 000 µM) of exogenously applied reduced glutathione (GSH). Using fluorescence microscopy the MT were visualized with monoclonal anti-tubulin antibodies and actin filaments were stained with rhodamin labelled phalloidin (RLP). GSH-treated callus cells showed modifications on the form and arrangement of both cytoskeletal elements, when compared to the control.
Diurnal variation of chloroplast tine structures of spinach
Authors: Zellnig Günther , Perktold Andreas
Published: November 2023

Complete chloroplasts and their fine structures were quantitatively analysed by means of ultrathin serial sections and digital image analysis in order to obtain precise ultrastructural data about diurnal adaptations of the organelles. During the daily course the average chloroplast volume increased from 31 µm3 in the morning to 44 µm3 in the evening. In the same time the absolute volumes of starch, thylakoids and plastoglobuli also increased, though to different extents. These observed differences in the diurnal behaviour of this organelles are essential for a precise evaluation of naturally occurring or stress induced changes in chloroplasts.
Learning the process of the cell cycle in 13- and 14 year-olds
Authors: Strgar Jelka
Published: November 2023

The new biology curriculum introduced the teaching of mitosis to 13- and 14-year-olds students in Slovenia. Mitosis is a challenging topic for this age. In our study, we enrolled a sample group of 95 students to check if the method of teaching mitosis first described by Danieley (1990) could be effective for students of this age. Prior to the survey, the students had not yet dealt with the division of cells; most of them did not even know that all living organisms are made of cells. The results show that this method is effective; enrolled students used logical reasoning and were thus able to understand how the events in the cell cycle and the process of mitosis follow one another. The majority of students correctly arranged 15 drawings presenting the stages of the cell cycle after the lesson, and their knowledge retention was satisfactory. Incorrect placements of drawings did not show any typical mistakes in students thinking about the cell cycle that should create specific concerns for the biology teachers.
Microlitter measurement in fish Rutilus rutilus from the Slovenian part of the Mura river basin
Authors: Bogdan Domen , Kolerič Tamara , Meznarič Marija , Kozjek Marko , Kovač Viršek Manca
Published: November 2023

Knowledge of the impacts of microlitter pollution on the freshwater environment is still less researched when compared to that of marine environments despite rivers being the main pathway for transport of microlitter pollution to the seas and oceans. To better understand the state of pollution with microplastics in Slovenian freshwater fish, we did the first study of microlitter in freshwater fish, in which 50 specimens of common roach (Rutilus rutilus) caught in the Slovenian part of the Mura river basin were examined for its presence. The gastrointestinal tract was dissected from each specimen and degraded with 10% KOH. Filtered samples were then checked for microlitter using a stereomicroscope and ATR-FTIR spectroscopy. Microlitter was separated into microplastic particles (0.3 – 5 mm) and textile fibres, which can be of synthetic or seminatural origin. Microlitter was found in 94% of specimens, with an average concentration of 5 ± 3 items/specimen. Colourful fragments and textile fibres were found. Fibres were the predominant form (96%) and indicated households as the main source of microlitter in the Mura river. A strong positive correlation between the number of microlitter and the weight of the fish was found (R2 = 0.70). In the future, simultaneous monitoring of microlitter in sediments, water, and fish would be necessary to assess whether Rutilus rutilus is an appropriate species for biomonitoring. Given the growing evidence of the negative effects of microlitter on organisms, it will be important to carry out biomonitoring in terms of assessing environmental status and conditions for human health.
Geranylgeranylacetone reduces cardiomyocyte stiffness and attenuates diastolic dysfunction in a rat model of cardiometabolic syndrome
Authors: Waddingham Mark T. , Sequeira Vasco , Kuster Diederik W. D. , Dal Canto Elisa , Handoko M. Louis , de Man Frances S. , da Silva Gonçalves Bós Denielli , Ottenheijm Coen A. , Shen Shengyi , van der Pijl Robbert J. , van der Velden Jolanda , Paulus Walter J. , Eringa Etto C.
Published: November 2023

Titin‐dependent stiffening of cardiomyocytes is a significant contributor to left ventricular (LV) diastolic dysfunction in heart failure with preserved LV ejection fraction (HFpEF). Small heat shock proteins (HSPs), such as HSPB5 and HSPB1, protect titin and administration of HSPB5 in vitro lowers cardiomyocyte stiffness in pressure‐overload hypertrophy. In humans, oral treatment with geranylgeranylacetone (GGA) increases myocardial HSP expression, but the functional implications are unknown. Our objective was to investigate whether oral GGA treatment lowers cardiomyocyte stiffness and attenuates LV diastolic dysfunction in a rat model of the cardiometabolic syndrome. Twenty‐one‐week‐old male lean (n = 10) and obese (n = 20) ZSF1 rats were studied, and obese rats were randomized to receive GGA (200 mg/kg/day) or vehicle by oral gavage for 4 weeks. Echocardiography and cardiac catheterization were performed before sacrifice at 25 weeks of age. Titin‐based stiffness (Fpassive) was determined by force measurements in relaxing solution with 100 nM [Ca2+] in permeabilized cardiomyocytes at sarcomere lengths (SL) ranging from 1.8 to 2.4 μm. In obese ZSF1 rats, GGA reduced isovolumic relaxation time of the LV without affecting blood pressure, EF or LV weight. In cardiomyocytes, GGA increased myofilament‐bound HSPB5 and HSPB1 expression. Vehicle‐treated obese rats exhibited higher cardiomyocyte stiffness at all SLs compared to lean rats, while GGA reduced stiffness at SL 2.0 μm. In obese ZSF1 rats, oral GGA treatment improves cardiomyocyte stiffness by increasing myofilament‐bound HSPB1 and HSPB5. GGA could represent a potential novel therapy for the early stage of diastolic dysfunction in the cardiometabolic syndrome.
Some notes on graded weakly 1-absorbing primary ideals
Authors: Alshehry Azzh Saad , Abu-Dawwas Rashid , Al-Rashdan Majd
Published: November 2023

A proper graded ideal

P

P

of a commutative graded ring

R

R

is called graded weakly 1-absorbing primary if whenever

x
,
y
,
z

x,y,z

are nonunit homogeneous elements of

R

R

with

0
≠
x
y
z
∈
P

0\ne xyz\in P

, then either

x
y
∈
P

xy\in P

or

z

z

is in the graded radical of

P

P

. In this article, we explore more results on graded weakly 1-absorbing primary ideals.
Fabrication and physicochemical characterization of copper oxide–pyrrhotite nanocomposites for the cytotoxic effects on HepG2 cells and the mechanism
Authors: He Yun , Huang Hua , Fan Minyu , Wang Zhaojiong , Liu Xiongwei , Huo Jiege
Published: November 2023

Novel CuO–FeS nanocomposites were synthesized to exert anticancer effects on HepG2 cells. The formation was initially demonstrated using UV–Visible spectrophotometry analysis, which indicated two peaks at 335 and 370 nm. Characteristic Fourier transform infrared spectroscopy peaks for Cu–O and Fe–S bonds were observed at 516, 577 and 619 cm−1 in addition to other notable peaks. The Miller indices correspond to the lattice spacing of monoclinic CuO and FeS as observed by selected area diffraction rings concurrent with the X-ray diffraction observations. The morphology was interpreted by scanning electron microscopy and transmission electron microscopy, indicating a particle size of 110 nm. As per energy-dispersive X-ray spectroscopy analysis, strong peaks for Cu (0.9, 8 and 9 keV), Fe (6–7 keV), O (0.5 keV) and S (2.5 keV) indicated the formation of CuO–FeS blend with no impurities. A mean particle size of 121.9 nm and polydispersity index of 0.150 were displayed by dynamic light scattering analysis and the zeta potential was −29.2 mV. The composites were not toxic to normal 3T3-L1 cells and were not haemolytic even at higher doses. In addition, the stable composites exerted cytotoxic effects on HepG2 cells (IC50 = 250 ± 5.7 μg/mL) and induced cell death by creating a loss in mitochondrial membrane potential and induction of mitochondrial apoptosis in a ROS-independent manner.
Effect of impregnation with diammonium phosphate and sodium silicate on some physical and mechanical properties of modified laminated veneer lumber made of jabon wood
Authors: Alamsyah Eka Mulya , Abdullah Ahmad Fawwaz , Suhaya Yoyo , Sutrisno  , Darwis Atmawi , Sumardi Ihak , Suheri Asep , Munawar Sasa Sofyan , Malik Jamaludin
Published: November 2023

Laminated veneer lumber (LVL) and laminated veneer board (LVB) panels from jabon wood (Neolamarckia cadamba) were impregnated with fire retardation substances, namely diammonium phosphate (DAP) and sodium silicate (SS). Prior to testing, the boards were conditioned in relative humidity (RH) of 65% and a temperature of 25 °C. The moisture content (MC), bending strength tests in flat wise position, and bonding tests were conducted in accordance with the Japanese Agricultural Standard (JAS:2008). Density tests and hardness tests were conducted in accordance with ASTM D143 standard (2003) in 50 mm x 50 mm. Thickness-swell shrinkage tests were conducted in accordance with the standard BS EN 317:1993, and fire resistance was tested under PS 1-19 standard. The use of 20% DAP and SS solution on jabon wood using impregnation methods affected some of the properties of the panels, especially the moisture content, density, and bonding strength of LVL and LVB compared to the control panels. Both DAP and SS impregnation increased the density. The treatments showed promise for resisting fire, as well as increasing the moisture content and increasing the density compared to the control.
A critique of terms and symbols in school mathematics
Authors: Vilkas Robertas
Published: November 2023

Criticism of some terms and symbols of school mathematics is presented, and recommendations are given. The problem of writing decimal fractions using a comma and the resulting semicolon when separating such numbers, which contradicts not only the international symbols of mathematics, but also the general rules of the Lithuanian language, is discussed separately. The incorrect use of the concept of an elementary event not only in schools, but also in universities, is discussed in more detail.
On using a non-probability sample for the estimation of population parameters
Authors: Burakauskaitė Ieva , Čiginas Andrius
Published: November 2023

We aim to find a way to effectively integrate a non-probability (voluntary) sample under the data framework, where the study variable is also observed in a probability sample of some statistical survey. The selection bias that arises from voluntary participation in the survey is corrected by estimating the inclusion into the sample probabilities (propensity scores) for the units in the non-probability sample. The estimators for the propensity scores are constructed using a parametric logistic regression model. We consider two modeling scenarios: with an assumption that the willingness to participate in the voluntary survey does not depend on the survey variable itself and that such a variable does contribute to whether the individual responds or not. The maximum likelihood method is applied in both scenarios to estimate the propensity scores. The estimators of the population mean based on the estimated propensity scores are linearly combined with the unbiased estimator using the probability sample data. We compare the constructed estimators in the simulation study, where we estimate the population proportions using data from the Population and Housing Census surveys.
Sturm–Liouville problem with two point nonlocal second type boundary condition
Authors: Pečiulytė Sigita , Štikonas Artūras
Published: November 2023

The Sturm–Liouville problemwith one classical boundary condition and other two point second type nonlocalboundary conditions is considered in this paper. Three cases of nonlocal conditions are investigated.There is analysed how spectrum of this problem depends on boundary condition parameters. Qualitativebehavior of all eigenvalues subject to nonlocal second type boundary condition parameters is described.
On the argument of zeta-functions of certain cusp forms
Authors: Ivanauskaitė Rūta
Published: November 2023

There is not abstract.
The Boolean zeta function
Authors: Javtokas Algirdas
Published: November 2023

This paper provides analysis on Dirichlet series with an coefficients obtained from MAJm (x1,..., xm) function known in theoretical computer science.
Asymptotical expansions in the Kubilius theorem of large deviations
Authors: Skrabutėnas Rimantas
Published: November 2023

In the present paper, a local theorem of large deviations for arithmetic functions defined in Knopfmacher’s semigroup is obtained.
On the boundary value problems for ordinary differential equations with isolated singularity
Authors: Aldošina Kristina , Rutkauskas Stasys
Published: November 2023

We consider some two-point boundary value problems for second order o.d.e. with strong singularity. The asymptotics of the solutions at the singular point are given. The existence and uniqueness of the solutions of those problems are prooved.
The boundary Riemann problem of the power-logarithmic order of infinity index for the half-plane
Authors: Alekna Petras
Published: November 2023

The boundary Riemann problem of the power-logarithmic order of infinity index for the half-plane in the class ℬ of bounded analytic functions and in the class ℬ0(ρ, n) ⊂ ℬ, is investigated. Also, the necessary and sufficient conditions for the solution of this problem in the class ℬ0(ρ, n), are obtained.
Hopf bifurcation on one of tumor models
Authors: Kavaliauskas Algis
Published: November 2023

The article deals with qualitative analysis of model of pulsing tumor. The model is described by the system of second order differential equations. The region of parameters is determined where the Hopf bifurcation of the stationary zero point is possible.
Zur pseudosymmetrische und Ricci-pseudosymmetrische Kartanische Räumen
Authors: Mazėtis Edmundas
Published: November 2023

In dieser Arbeit sind die Kartanische Räumen mit komplexe Strukturen untersucht. In diesen Räumen exissieren die innere pseudo-Kählere und pseudo-Hermitan Strukture. Man findet Bedingungen, mit welchen die Kartanische Räumen mit diesen Strukture pseudosymmetrisch und Ricci-pseudosymmetrisch sind.
On some cardinal invariants of space of finite subsets
Authors: Praninskas Gintaras
Published: November 2023

In article is investigated relationships between some cardinal invariants of topological space and it’s space of finite subsets with Vietoris topology. In generalwe note coincidence of them.
Formalisation of the sofware component ontology specification
Authors: Bagušytė Lina , Lupeikienė Audronė
Published: November 2023

This paper is devoted to the development and specification problems of software component ontology. The formalisation of the proposed component ontology is presented, too. The choice of ontology interpretation  is motivated. The paper discusses the content of the ontology specification and its development. The mereological theory of software component, one of the constituent parts of a formal component specification, is presented.
The algorithm for creation of 2d network
Authors: Kleiza Vytautas , Kleiza Jonas
Published: November 2023

The research presents the program module for calculation of net area of 2d multiple connected region is created. The program is written in language of the mathematical package Maple.
The differences of B2C and B2B workflow exception handling
Authors: Vojevodina Dovilė , Kulvietis Genadijus
Published: November 2023

As business competition is getting stronger companies are seeking good relationships with their clients through the Internet technologies. The type of this relationship (B2Cor B2B) usually dependson the business strategy of this company. Using e-business technologies companies expect quick and qualitative contact with clients. Still, the quality of this solution depends on many aspects, but the main is application performance. The medium for these applications is Internet and it is not always reliable through all the engagement process. This paper is dedicated to the distinctions of B2C and B2B e-business application exception handling in a user friendly way.
Application of the methods of monotonic sequences
Authors: Mačys Juozas Juvencijus
Published: November 2023

The method of monotonic sequences (see [1], [2]) is considered and the issue of its exactness is discussed. It is shown how the method can be applied to finite sums with a large number of summands.
Analyse of students' assessment during final exams in secondary school and their first and second sessions in mathematics at Vytautas Magnus University and Kaunas Technical College
Authors: Rutkienė Aušra , Augutienė Elvyra
Published: November 2023

The analysis of the of students’ assessment during final exams in secondary school and their first and second sessions at college and at university in mathematics was presented. Analysis demonstrates that  students are not ready to work hard in case to get better marks at college and university. The students' grades are decreasing; but there is correlation between school grade and university's or college’s grade.
State examinations in mathematics and evaluation standards
Authors: Šinkūnas Juozas , Urbonas A.P.
Published: November 2023

Results of the mathematics state examination are analyzed and compared with evaluation standards.
Completeness classes for intuitionistic first-order temporal logic with time gaps
Authors: Alonderis Romas
Published: November 2023

There is not abstract.
Transformations of random variables
Authors: Bikelis Algimantas , Turkuvienė Jurgita
Published: November 2023

Transformation of random variable ξG ∼ GZD(α, β1,β2, δ, μ) is obtained in this article.
Modeling of zonal anisotropic variograms
Authors: Budrikaitė Lina
Published: November 2023

Most standard methods of geostatistical analysis are built upon the basic assumption of isotropy. However, spatial data in most cases are not isotropic. In practice typically we find data with zonal anisotropy. Zonal anisotropy is more complex than geometric; what is more, most software requires anisotropy to be geometric. In this paper an overview of models of zonal anisotropy is presented. Models of variograms with zonal anisotropy were fitted to the salinity data using R, the system for statistical computations and analysis.
Discriminant analysis of Gaussian spatial data with exponential covariance structure
Authors: Dučinskas Kęstutis
Published: November 2023

This paper considers the discrimination of the observation of the stationary Gaussian random field belonging to one of two populations with different means and covariance functions. Assumming that covariance functions has exponential structure, the unknown means and covariance parameters are estimated by ML method. Approximation of the expected error rate associated with Bayes plug-in discriminant function is derived.
Cornish–Fisher expansions of generalized z-distribution
Authors: Turkuvienė Jurgita , Bikelis Algimantas
Published: November 2023

The article presents Cornish–Fisher expansions of generalized z-distribution.
Discrete resource allocation to groups of customers
Authors: Tiešis Vytautas
Published: November 2023

The paper deals with the non-homogeny discrete resource allocation to groups of customers with non-linear profit functions. The fast hierarchical greedy algorithms are presented and investigated. The exact upper boundwas found for complexity of the algorithm. The experiments prove the advantage of the modification of the algorithm.
Modelling of the surface of the liquid metal drop with nonfixed radius
Authors: Čiupaila Regimantas
Published: November 2023

Two first order nonlinear differential equations system with the separated boundary conditions and nonlocal integral conditions is considered. The system is modeling the surface of the liquid micro volume drop with nonfixed radius on the horizontal plane. The boundary problem is brought to the initial one. The iterative algorithm is proposed to count the curve of the crest of the drop depending on some geometrical and mechanical parameters.
Error estimation for n-th order Filon quadrature formula
Authors: Plukas Kostas , Plukienė Danutė
Published: November 2023

In this paper the error estimation for n-th order Filon quadrature formula is discussed.
The classification of concentration of mixture of analytes using total principal component regression
Authors: Baronas Romas , Ivanauskas Feliksas , Paulauskas Robertas , Vaitkus Pranas
Published: November 2023

In this paper total principal component regression is used for biosensors response to mixtures of compounds classification. The results are compared with the results obtained using artificial neural networks.
Making Virtual Learning Environment more intelligent: the problem of software agent’s mental state recognition
Authors: Baziukaitė Dalia
Published: November 2023

Intelligent decision making process, which is performed according to a learner in the Virtual Learning Environment (VLE), leads to the problem of solving several rather complex tasks. Two of them are most of interest. First, we need to train a software agent to recognize its mental state; and second, we want agent to apply optimal strategy to teach learners when it is in some mental state. The second issue we have discussed in [2]. We propose the agent’s ability to recognise its mental state could be based on the classification result to a particular learner. Classification used to be done should be based on the discovered groups in the database data and classification rules that prescribe given learner to the one of the available clusters. Conceptual clustering seems to be the suitable technique able to provide a solution for the problem raised.
First spring arrival response to climate warming in birds
Authors: Ivanauskas Feliksas , Lapinskas Remigijus , Žalakevičius Mečislovas
Published: November 2023

There is not abstract.
Computer simulation of the steady state currents at enzyme doped carbon paste electrodes
Authors: Ivanauskas Feliksas , Laurinavičius Valdas , Šimkus Remigijus , Kaunietis Irmantas
Published: November 2023

Reaction-diffusion in porous enzyme-doped carbon paste electrode has been analyzed. The plate-gap model of such electrode has been proposed. The steady state current was calculated for the wide range of given parameters. The apparent parameters (apparent maximal currents and apparent Michaelis constants) of the modelled electrode were calculated. Relationships between apparent and given parameters were derived.
On convergence of the accumulated insurance claim processes to the compound Poisson process
Authors: Banys Rimas
Published: November 2023

Convergence of the accumulated insurance claim processes is investigated when the number of clients of insurance company depeds on time. Conditions for convergence to the compound Poisson process in the function space D[0,∞) endowed with the Skorohod M1 and J1 topologies are obtained.
On the rate of convergence of degenerate U-statistics
Authors: Januškevičienė Olga
Published: November 2023

Let X, X1, X2, ... be independent identically distributed random variables taking values in a measurable space (Ω, ℜ). Let h(x, y) be real valued measurable symmetric function of the arguments x, y ∈ ℜ.Assume that Eh(x, X)= 0, for all x. We consider U-statistics of type T = n−1 ∑1 ≤ i< k ≤ n  h(Xi, Xk). Let qi,  i ≥ 1 be eigenvalues of the Hilbert-Schmidt operator associated with the kernel h(x, y) and q1 be the largest eigenvalue. Under the condition β3 := E|h(X, X1)|3 <∞, we prove that Δn = ρ(T, T0) ≤ cβ3q−11 n−1/7 +cq−11∑i ≥ 1 qin−1/4, where T0 is the limit statistic and ρ is a Kolmogorov (or uniform) distance.
GAMESS calculations in parallel environment
Authors: Vošterienė Svajonė , Šulskus Juozas
Published: November 2023

There is not abstract.
Parallel algorithms in image filtering
Authors: Čiegis Raimondas , Jakušev Aleksandr
Published: November 2023

In this paper, image-filtering parallelization is described. A description of mathematical problem is given, and general parallelization tools suitable in this case are overviewed. Then the ParSol parallel array package used for parallelization is described, together with computational results of its application.
Investigation of outlier detection algorithm
Authors: Šaltenis Vydūnas
Published: November 2023

The proposed outlier factor was used to analyze the multidimensional data sets regarding outlier detection. The paper describes two kinds of investigation: the influence of omitting some part of distances between data points, and the influence of additional (noisy) points to outlier detection quality.  The results demonstrate the possibilities to improve the performance of computation and the stability of the outlier detection algorithm.
Osculating paraboloid
Authors: Navickis Kazimieras
Published: November 2023

Osculating paraboloid of second order have been studied in classical differential geometry. In this article we generalize this concept to osculating paraboloids of higher order. This yields a visualization of the local properties of a given surface which depend on the derivatives of higher order.
Solution of two-dimensional parabolic equation with nonlocal integral boundary conditions
Authors: Jakubelienė Kristina
Published: November 2023

Two-dimensional parabolic equation with nonlocal integral boundary conditions in a rectangle domain in this paper is solved by  alternating direction method. To ﬁnd the solutions of this problem we are looking to solve a linear system of equations. This algorithm is realized on particular example and assess the error of solution.
fANOVA application for comparison of companies by the CEO turnover rates
Authors: Deinoravičiūtė Urtė , Yasyreva Anna
Published: November 2023

The aim of this study was to analyze the data from the Nasdaq Baltic listed companies’ financial statements and to estimate if the CEO changes have a significant influence on the financial performance: profitability, indebtedness and stock price. Data was collected and financial ratios were computed for 34 companies during 2006 to 2021 (2008 to 2022 for stock prices). The companies were divided into 3 groups: ones that had no CEO changes over the period; those that had 1 or 2 and those with 3 or more. Point-wise ANOVA, fANOVA and fMANOVA were conducted. Both point-wise and functional ANOVA indicated that there is a significant difference of at least one group from the others in terms of ROA and EBITDA margin. After conducting two-sample tests, the group with 3 or more CEO changes was identified as having a significantly higher EBITDA margin than the others. Furthermore, a significant positive relationship between the stock price and the CEO turnover was uncovered in the function-on-scalar regression results.
ON THE DETERMINATION OF THE SPECIFIC HEAT FLUX VALUE IN A PULSE DETONATION ENGINE’S CHAMBER
Authors: Aksonov О.С. , Золотько О.Є. , Марченко О.Л.
Published: November 2023

Abstract. The development of detonation engines (DE) is one of the most promising areas of rocket and space engine manufacturing. They are more efficient as compared to the liquid rocket engines and are structurally simpler. At the same time, the detonation engine chamber’s structure is subjected to much higher thermal loads. Therefore, at the development stage of the DEs, to create an efficient cooling system for the engine’s chamber, it is necessary to be able to determine the value of thermal energy, which is absorbed by the walls of the DE’s chamber. The goal of this research is to determine the specific heat flux from the detonation products towards the walls of the pulse detonation engine’s (PDE) chamber. The task of the work is to establish the methodology for calculating the values of the specific heat flux transmitted to the walls of the PDE’s chamber. The main tools for solving this problem are the method of mathematical simulation using computational fluid dynamics (CFD), and the method of regression analysis. The main results of this study: the possibility to utilize the well-known Ievlev methodology to determine the convective specific heat flux for the PDE’s chamber was analyzed; it was shown that for the conditions of the PDE’s chamber, the Ievlev methodology calculation results differ significantly from the experimental data, which can be explained by the presence of a clearly pronounced non-stationary nature of the detonation process; it was proven the utilization of the Viegas formula to obtain the values of the convective specific heat flux for the PDE’s chamber gives better results as compared to the known experimental data and the results of the mathematical simulations; it was also demonstrated that the average integral value of the specific heat flux, determined by the described methodology, can be used to calculate the thermal state of the PDE's chamber. Conclusion: a methodology for calculation of the specific heat flux value for the pulse detonation engine's chamber was proposed. The obtained calculation results are in good agreement with the results of mathematical simulations and known experimental data. The described methodology can be used in the design of cooling systems for the pulse detonation engine’s chambers.
ДОСЛІДЖЕННЯ ВПЛИВУ ШОРСТКОСТІ ПОВЕРХНІ ВУГЛЕПЛАСТИКІВ НА ГЕРМЕТИЧНІСТЬ РОЗНІМНИХ З’ЄДНАНЬ В РАКЕТНО-КОСМІЧНІЙ ТЕХНІЦІ
Authors: Літот О.В. , Манько Т.А.
Published: November 2023

Анотація. Стаття присвячена питанню забезпечення герметичності роз'ємного фланцевого з'єднання з вуглепластику, яке працює у кріогенному середовищі. При проектуванні деталей з композиту одночасно вирішується завдання з проектування, створення матеріалу та технології їх виготовлення. Виходячи з цієї особливості композитів, досконалість технології виготовлення є одним із найважливіших параметрів, що визначає склад усієї конструкції. Таким чином, для отримання виробів, що володіють високим коефіцієнтом вагової ефективності та виконують вимоги, що застосовуються при проектуванні ракетно-космічної техніки, необхідна розробка та постійне вдосконалення технології. У ракетно-космічній галузі широко застосовуються полімерні композиційні матеріали, і в першу чергу вуглепластики, при виготовленні силових елементів, термостійких панелей та герметичних оболонок, експлуатація яких потребує високих параметрів питомої міцності, температуростабільності та герметичності. Так, використання вуглепластиків виправдано високими показниками питомої міцності та жорсткості, що дозволяє мінімізувати масу більшості деталей, що мають форму тіл обертання. При виготовленні виробів ракетно-космічної техніки, а саме кріогенних трубопроводів і паливних баків із вуглепластику істотно впливає на герметичність виконання роз’ємних з’єднань. Це зумовлено високою різницею коефіцієнтів лінійного температурного розширення елементів що знаходяться в контакті вважаючи різну схему армування, матеріал ущільнень та жорсткості контактних поверхонь. Велику увагу приділено питанню формування якісної поверхні вуглепластика, у тому числі складно профільної, виключаючи механічну обробку деталі. В роботі виготовлені дослідні конструкції роз'ємного фланцевого з'єднання кріогенного трубопроводу пропускною здатністю Ø146 мм із вуглепластику. Ефективність прийнятих конструктивно-технологічних рішень підтверджена випробуваннями на герметичність рідким азотом та газоподібним гелієм. Представлено оцінку отриманих результатів та висновки щодо виконаної роботи.