bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengaruh Customer Experience dan Brand Trust terhadap Customer Loyalty
Authors: Khanifa Khanifa , Rizkiyah Tiara Fitri , Azzatillah Azzatillah
Published: January 2025

Tujuan penelitian ini adalah untuk mengetahui pengaruh customer experience dan brand trust terhadap customer loyalty pada Naifah Skin Clinic Indramayu. Penelitian ini menggunakan pendekatan kuantitatif dengan pengumpulan data menggunakan observasi dan penyebaran kuesioner. Sampel dalam penelitian ini sebanyak 67 orang yang merupakan pelanggan Naifah Skin Clinic Indramayu. Analisis data menggunakan regresi berganda dengan dibantu perangkat lunak SPSS 2 dengan uji instrumen (uji validitas dan uji reliabilitas) dan uji asosiatif. Hasil analisis menunjukkan customer experience berpengaruh positif signifikan terhadap customer loyalty dan brand trust berpengaruh positif signifikan terhadap customer loyalty.
Pengaruh Kualitas Produk Terhadap Pembelian Impulsif Generasi Z di Kota Singaraja Pada TikTok Shop
Authors: Mardiana Mardiana , Shandy Venny Mellandhia , Novrina Putri Dwi
Published: January 2025

Penelitian ini dilakukan untuk mengetahui pengaruh kualitas produk terhadap pembelian impulsif generasi Z. Sebanyak 300 responden dari kota Singaraja digunakan sebagai sampel untuk penelitian ini. Terdapat beberapa teknik analisis yang digunakan dalam penelitian ini, yaitu analisis regresi linier, uji asumsi klasik, dan uji t. Dari hasil pengujian didapatkan nilai t hitung sebesar 17.506 dan p-value 0,000. Nilai p-value yang lebih kecil dari 0,05 membuktikan bahwa kualitas produk berpengaruh signifikan secara positif terhadap pembelian impulsif generasi Z.
Analisa Pengaruh Kemudahan, Kepercayaan dan Keamanan terhadap Kepuasan Pengguna Aplikasi Dana
Authors: Simanjuntak Ivori Gracia , Muhammad  Haris Saputra  , Melisa  , Icha Saswyta Manurung  , Ivan Cristhian  , Vidyan Lim
Published: January 2025

Kemajuan teknologi menciptakan berbagai inovasi dalam pembangunan infrastruktur dan kebiasaan baru untuk mempercepat serta mempermudah seluruh aktivitas sehari-hari manusia. Salah satu inovasi teknologi adalah terbentuknya industri Fintech yang menggabungkan bidang keuangan dan teknologi sebagai percepatan akses layanan keuangan, serta kemudahan dalam bertransaksi keuangan yang dirasakan berbagai pihak. Tujuan penelitian ini ialah guna mengetahui kepuasan mahasiswa pengguna aplikasi DANA yang ada Jambi berdasarkan aspek kemudahan, kepercayaan dan keamanan yang dirasakan selama bertransaksi menggunakan aplikasi DANA. Sampel yang digunakan dalam studi ini memanfaatkan pendekatan kuantitatif dengan menyebarluaskan kuisioner ke 100 responden yang diolah menggunakan skala likert dan aplikasi SPSS dengan jumlah 24 pertanyaan yang disebarkan ke platfrom digital dengan sasaran pengguna aplikasi dana dengan lama penggunaan kurang dari 6 bulan hingga lebih dari dua belas bulan dengan segmentasi mahasiswa berusia 17 hingga 27 tahun. Bersumber pada uji T (parsial) mengunjukkan variabel kemudahan, dan keamanan memengaruhi kepuasan dari pengguna aplikasi DANA secara positif dan signifikan, sedangkan variabel kepercayaan memiliki pengaruh positif namun tidak signifikan terhadap kepuasan dari pengguna aplikasi DANA. Hasil dari uji F (simultan) menunjukkan variabel independen yang diuji secara bersama-sama signifikan memengaruhi kepuasan pengguna aplikasi DANA. Dari nilai hasil uji koefisien determinasi menunjukkan nilai Adjusted R Square sebesar 71,5% yang mengartikan bahwa kepuasan pengguna aplikasi DANA dapat mewakili variabel kemudahan, kepercayaan, dan keamanan, sementara 28,5% sisanya dapat dipengaruhi dari variabel bebas lainnya di luar penelitian ini.
The role of the Teach-Qual Model on Students’ mathematics interests: The mediating effects of students’ perception on mathematics
Authors: Asare Bright , Yaribatuah Peter , Ohene Boateng Francis , Appiagyei Ebenezer
Published: January 2025

This work aimed to examine the role of Teach-Qual (Teachers Quality) model on student’s mathematics interest as mediated by student’s perception in mathematics. The study sample 300 students from three senior high schools found in the Ashanti Region of Ghana using Convenience, stratified sampling, and simple random sampling. The study is purely a quantitative method which employed questionnaire as a data collection tool. The data was analyzed by using Amos (Ver. 23) for estimating the result for the hypothesis path. The outcome of this study revealed that, teacher-student’s-collaboration and teacher empathy yielded a direct positive and statistically improved impact on student’s maths interest. Student’s perception in mathematics partially mediates the association between teacher empathy as well as student’s mathematics interest. Moreover, perception in mathematics partially mediates the relationship between teacher-student’s-collaboration and student’s maths interest. The study recommended mathematics teachers to collaborate with students in terms of classroom teaching and learning, work more practical mathematics examples with students in the class in order to enhance student’s mathematics interest.
Improving geometric thinking skills through learning cycles assisted by interactive geometry books
Authors: Fatihah Jihan Jamilatul , Sudirman Sudirman , Mellawaty Mellawaty
Published: January 2025

This research aims to analyze the increase in geometric thinking skills after using the Learning Cycle assisted by an interactive Geometry Book. The research design used is an experiment Design. In addition, the participants in this research were students in class VIII B at a private school in Indramayu Regency. Apart from that, the test instrument in this research is a test sheet in the form of a description. Next, the data obtained from the pre-test and post-test were analyzed statistically using the paired samples t-test. Based on the research results, it shows that the N-gain score shows an average value of 0.8903 or 89.03%, which is included in the high category. Furthermore, based on the normality test of the pre-test and post-test data, it shows that both data are normally distributed. Apart from that, based on the results of the paired samples test calculation, the Sig value is known. (2-tailed), namely 0.000 < 0.05, then Ho is rejected and Ha is accepted. Therefore, this study concludes that there is a difference in the average increase in students' geometric thinking abilities before and after using the interactive learning cycle assisted by interactive geometry books.
PULBIN PEDIA: an Interactive dynamic web as a bioconservation learning resource for preservice science teacher
Authors: Natadiwijaya Ismail Fikri , Yuliana Eva , Sugianto Sugianto , Rachman Dwi Fauzi , Subkhi Nur , Luzyawati Lesy
Published: January 2025

Bioconservation is an interdisciplinary science whose purpose is to encourage the development of theory and application in conservation areas. Biawak Island is one of the leading conservation areas in the Indramayu district, therefore Bioconservation learning should be done directly on Biawak Island. In practice, studying Bioconservation directly on Biawak Island is difficult because of the long distance and expensive access to this place. Based on these problems, an interactive dynamic web in the form of a digital encyclopedia is a solution for the problem. Digital encyclopedia named “PULBIN PEDIA”. That was implemented in one of the private universities in West Java. The design used is Descriptive Qualitative. A qualitative approach is a research procedure that produces descriptive data in the form of written or spoken words from people and observed behavior. This research was conducted on 24 students who were taking the course of Bioconservation in the academic years of 2023/2024.  The results of the analysis from observations found that PULBIN PEDIA is an interactive and dynamic media and can be implemented as an integrated learning resource in Bioconservation lectures because it contains complete and accurate information regarding the location, origin of the name, management, conservation activities, conservation actors and biodiversity on Biawak Island. PULBIN PEDIA also can be implemented as a learning resource in lectures that apply problem-based learning strategies where students can find 3 (three) conservation problems, investigate components that have been conserved, and formulate solutions on how to preserve Biawak Island.
Optimizing Variable Selection with Bayesian t-Lasso Regression: A Comparison of Normal-mixture and Uniform-mixture Representations for Outlier Data Analysis
Authors: Mohmmad Nasim Wafa  , Shuja Shujauddin
Published: January 2025

One of the discussed parts of the regression model is choosing the optimal model. The choice of the optimal model in regression models is to determine the important explanatory variables and the negligible variables and to express the relationship between the response variable and the explanatory variables in a simpler way. With the limitations of classical variable selection processes such as step-by-step selection, compensated regression methods can be used. One of the compensated regression models is Lasso regression. For data collection and statistical analysis in the presence of remote observations, instead of normal distribution, T-Student distribution can be used for the error of these data. In this article, we propose a variable selection method called T-Lasso Bayesian regression model for data analysis in the presence of outlying observations. Bayesian t-lasso regression model with two different representations of Laplace's prior density function for the coefficients of the regression model is investigated, so that first the Laplace density function is discussed in the form of mixed distribution-normal scale and then in the form of mixed distribution-uniform scale. Then, by using simulation methods and real data analysis, the superiority of the Bayesian T-lasso regression method is shown by showing the Laplace density function in mixed-uniform scale over normal mixed-scale display.
Influence of regional languages on presenting and solving local mathematics problems: a systematic literature review
Authors: Safitri Widya Sani , Sahmin Sahmin , Isnawan Muhamad Galang , Indrawati Indrawati
Published: January 2025

This research aims to find out how the use of regional languages ​​influences the presentation and solving of mathematical problems. In conducting research, researchers used the SLR (Systematic Literature Review) research method. Researchers searched journals on several websites with predetermined keywords. To make it easier to filter articles to be researched, researchers used the PRISMA flow. Where, there are several stages, namely identification, screening, eligibility, inclusion and exclusion criteria. In the final stage, 21 articles were obtained for research. The research results showed that the use of regional languages ​​in mathematics learning showed a positive influence on students' attitudes and motivation in learning mathematics. Apart from that, there is an increase in students' understanding of mathematical concepts and it makes it easier for students to solve local mathematics problems.
ANALISIS METAFORA KONSEPTUAL PADA ANIME ONE PIECE EPISODE 1071 - 1075 DENGAN PENDEKATAN SEMANTIK KOGNITIF
Authors: Iqbal Maulana  , Suwadi  , Sugianti
Published: January 2025

Tujuan penelitian ini adalah untuk melihat bagaimana metafora konseptual digunakan dalam episode anime One Piece 1071–1075 dengan menggunakan pendekatan semantik kognitif. Teori Lakoff dan Johnson, yang mengelompokkan metafora menjadi tiga kategori utama yakni ontologis, struktural, dan orientasional merupakan dasar untuk penyelidikan metafora konseptual. Data penelitian ini berasal dari dialog dan narasi anime yang mengandung metafora. Metode yang digunakan dalam penelitian adalah metode kualitatif dengan pendekatan analisis isi. Hasil analisis menunjukkan bahwa metafora ontologis adalah jenis yang paling banyak digunakan, dengan 34 data. Sebanyak delapan data menunjukkan metafora struktural dan enam data menunjukkan metafora orientasional. Penelitian ini juga menentukan fungsi bahasa dari metafora konseptual yang digunakan. Dari total 49 data yang ditemukan, 17 berfungsi sebagai puitis, 16 berfungsi sebagai emotif, 9 berfungsi sebagai referensial, 5 berfungsi sebagai konatif, dan 2 berfungsi sebagai patik. Penelitian ini menemukan bahwa metafora yang digunakan dalam anime One Piece tidak hanya meningkatkan aspek estetika cerita, tetapi juga membantu penonton melihat dan berbicara dengan karakter untuk lebih memahami konsep abstrak. Hasil ini diharapkan dapat membantu studi linguistik, terutama dalam memahami fungsi metafora dalam media populer dan komunikasi.
DINAMIKA ALIH KODE DAN CAMPUR KODE DALAM KOMUNIKASI PASAR TRADISIONAL PASREPAN KABUPATEN PASURUAN
Authors: Lusiana Wahyu Nawangsari  , Suwadi  , Ilmiyatur Rosidah
Published: January 2025

This research aims to analyze the dynamics of code-switching and code-mixing in communication at the Pasrepan traditional market, Pasuruan Regency, using Suwito's (1983) theory. The study identifies various factors driving the practices of code-switching and code-mixing dynamics, such as socioeconomic background, intercultural interactions, and the pragmatic functions of language within the market context. Through participatory observation and in-depth interviews, it was found that sellers and buyers often engage in code-switching and code-mixing to negotiate prices, build social relationships, and convey messages more efficiently. The data source for the research is the communication between sellers and buyers in the Pasrepan traditional market, Pasuruan Regency. The researchers collected data using audio recordings with a descriptive qualitative method, aiming to: (1) Describe the dynamics of code-switching in communication at the Pasrepan Traditional Market, Pasuruan Regency, (2) Describe the dynamics of code-mixing in communication at the Pasrepan Traditional Market, Pasuruan Regency. This study not only highlights the importance of understanding language dynamics in traditional markets but also provides insights into how these practices can influence language learning and social interaction in multicultural environments. Therefore, the results of this research are expected to contribute to the development of an Indonesian language learning model that can minimize the practices of code-switching and code-mixing, while also enriching sociolinguistic studies on language interaction in traditional markets in Indonesia.
ANALISIS TINDAK TUTUR EKSPRESIF CHO SAMDAL PADA DRAMA KOREA WELCOME TO SAMDALRI
Authors: Rachmawati Nur Fajri , Sugianti  , Ilmiyatur Rosidah
Published: January 2025

Penelitian ini menggunakan pendekatan deskriptif kualitatif untuk menganalisis bentuk dan fungsi tindak tutur ekspresif Cho Samdal dalam drama Korea Welcome to Samdalri. Untuk mendapatkan data, menggunakan teknik simak baca libat. Data kemudian dianalisis melalui menyimak, transkrip, dan kelompokan berdasarkan bentuk dan fungsi. Hasil penelitian menunjukkan bahwa terdapat 239 data yang menunjukkan berbagai bentuk tuturan Cho Samdal dalam drama Korea Welcome to Samdalri. Dari 239 data tersebut, 144 adalah tuturan langsung literal, 25 adalah tuturan tidak langsung literal, 65 adalah ucapan langsung tidak literal, dan 5 adalah tuturan tidak langsung tidak literal. Selain itu, penelitian ini menemukan berbagai fungsi, termasuk fungsi tindak tutur ekspresif. Yaitu tindak tutur ekspresif permintaan maaf 8 data, terima kasih 11 data, rasa simpati 15 data, mengucapkan salam 20 data, dan 154 data berbentuk sikap (marah, mengeluh, benci, bahagia, sedih, tegas, menyindir, terkejut, menggerutu,menyalahkan, memuji,)
Ultrasound assisted modification of graphite felt with electroless silver – Part 1: composition, morphology, structure and electrical conductivity
Authors: Macijauskienė Brigita , Griškonis Egidijus
Published: January 2025

The influence of ultrasound action on the modification of graphite felt with the electroless Ag was investigated. It has been gravimetrically estimated that mass fraction (wt.%) of Ag loaded on the surface of graphite felt filaments depends on the ultrasonic impact. The mass fraction of electroless-deposited Ag on the graphite felt filaments in the presence of ultrasound action is 1.6 times higher than the one of graphite felt modified without ultrasound action. The morphology, composition and structure of the internal and external filaments of graphite felt samples modified in the absence and presence of ultrasound action were determined by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD), respectively. It was found that a more uniform distribution of Ag particles in the whole volume of the graphite felt sample took place when ultrasonication of electroless Ag deposition solution was used. The nanaocrystaline Ag with an average crystallite size of 14 nm was deposited on the surface of graphite felt filaments in the absence of ultrasound action. Meanwhile, the crystallite size of electroless Ag slightly decreased to approximately 11 nm when ultrasonication was used during the deposition process. Uniform deposition of Ag particles of nanometric dimensions in the graphite felt matrix increased the electrical conductivity up to 10.7 S cm–1, and this value is about 1.6 times higher in comparison with conductivity of a bare graphite felt.
Synthesis of multisegmented polymers by RAFT using linear polytrithiocarbonates
Authors: Jonikaitė-Švėgždienė Jūratė , Krivorotova Tatjana , Joskaudas Tadas , Makuška Ričardas
Published: January 2025

Two types of polytrithiocarbonates were synthesized by step-growth polymerization. Method A was based on SN2 reaction between di(trithiocarbonate) anions and α,α’-dibromidoesters, and method B was based on Huisgen 1,3-dipolar cycloaddition between dialkyne-terminated trithiocarbonate and diazide. These multifunctional chain transfer agents (mCTA) were employed in reversible addition-fragmentation chain transfer poly­merization of 2-hydroxyethyl acrylate and styrene giving multisegmented homopolymers and multiblock copolymers multi-(polystyrene-b-poly(4-vinylbenzyl chloride)). mCTA prepared by the method A controls well polymerization of styrene, while mCTA prepared by the method B more suits for polymerization of 2-hydroxyethyl acrylate. Multisegmented polymers and multiblock copolymers were analyzed by size exclusion chromatography with triple detection, 1H nuclear magnetic resonance and differential scanning calorimetry. Dispersity of multisegmented poli(2-hydroxyethyl acrylate) was high, varying from 4 to 7, while dispersity of its hidrolyzed product (one block of poli(2-hydroxyethyl acrylate)) was narrow and equal to 1.2. It was demonstrated that multisegmented and multiblock polymers could be synthesized by the use of RAFT chain transfer agent with multiple trithio­carbonate moieties, and dispersity of the products was dependent on dispersity of the used mCTA.
Yeast-modified electrodes as amperometric biosensors for glycerophosphate
Authors: Garjonytė Rasa , Melvydas Vytautas , Malinauskas Albertas
Published: January 2025

Several strains of baker’s and wine yeast Saccharomyces cerevisiae and yeast Kluyveromyces lactis were screened for possible sources of the enzyme L-glycero­phosphate oxidase in whole cell amperometric biosensors for glycerophosphate. The sensitivity of a yeast-modified carbon paste electrode to glycerophosphate depended on the yeast sample, the mediator and the mode of electrode preparation. Potassium hexacyanoferrate (III) was found to be the most suitable mediator in terms of electrode sensitivity and stability. The best biosensor was based on commercially available baker’s yeast. The detection limit of such electrodes was in the range 33 to 48 μM of D,L-glycerophosphate. The response was linear in the concentration range from 0 to 2.4 mM.
Chromium containing sludge from metal surface treatment processes: stabilization in a ceramic body
Authors: Pileckaitė Justina , Valančienė Virginija , Minikauskas Algirdas , Denafas Gintaras
Published: January 2025

The effectiveness of stabilization of chromium containing sludge from metal surface treatment processes in a low-melting hydromicaceous clay ceramic body has been estimated. Only the chromium contained in the chromium electroplating process sludge may be stabilized in the hydromicaceous clay ceramic body with 5% and 10% of such sludge additive fired at 1 050 °C to 94.18 and 70.06%, respectively. Stabilization of sludge from the chromate conversion coating process at low temperatures which are typical of easily fusible hydromicaceous clay products is not effective, although the amount of chromium in leachate from the ceramic body with addition of this sludge decreases as the temperature is increased. Therefore the chromium contained in chromate conversion coating sludge is stabilized with the effectiveness of 32.47–79.30% in the ceramic body with addition of 10% of kaolin fired at 1 075–1 100 °C.
Redox reactions and cytotoxicity mechanisms of anticancer aziridinyl-substituted-1,4-benzoquinones: a minireview
Authors: Šarlauskas Jonas , Nemeikaitė-Čėnienė Aušra , Nivinskas Henrikas , Miliukienė Valė , Jarašienė Rasa , Pečiukaitytė Milda , Baltriukienė Daiva , Bukelskienė Virginija , Krikštopaitis Kastis , Čėnas Narimantas
Published: January 2025

In this paper, we summarize the data on the cytotoxicity mechanisms of aziridinyl-substituted-1,4-benzoquinones, which are potentially important antitumor agents known since 1980s. High antitumor activity of aziridinyl-1,4-benzoquinones arises from the combined effects of their two-electron enzymatic reduction into aziridinyl-substituted hydroquinones which alkylate DNA more readily than the parent quinones, the oxidative stress-type cytotoxicity due to the redox cycling of the corresponding quinone free radicals, and the direct alkylation of DNA by the low-potential aziridinyl-benzoquinones. However, it may also cause the undesirable side-effects, i. e. their cytotoxicity in primary mammalian cells. In this context, including our recent findings, we aim to review: i) the redox properties of aziridinyl-1,4-benzoquinones, ii) their reactivity and structure-activity relationships in single- and two-electron reduction by flavoenzymes and related redox systems, iii) the structure-activity relationships in their cytotoxicity, and iv) the mechanisms of the cell death and the expression of signaling proteins under their action.
Synthesis, characterization and properties of the graphene supported platinum–cobalt nanocatalysts
Authors: Jablonskienė Jolita , Kepenienė Virginija , Matusevičiūtė Agnė , Drabavičius Audrius , Tamašauskaitė-Tamašiūnaitė Loreta , Norkus Eugenijus
Published: January 2025

The graphene (GR) supported PtCo catalysts with different Pt:Co molar ratios were fabricated by means of the rapid microwave heating method. The size and shape of catalyst nanoparticles were determined by means of Transmission Electron Microscopy. Electrochemical properties of the PtCo/GR catalysts were investigated towards the electro-oxidation of methanol in an acidic medium by means of cyclic voltammetry and chronoamperometry.The PtCo/GR catalysts with an average Pt particle size of ca. 1–3 nm were synthesized from the reaction mixture containing H2PtCl6, CoCl2 and ethylene glycol. It should be noted that the electrocatalytic activity of PtCo/GR catalysts depends on the molar ratio of Pt:Co in the catalysts. It was found that the synthesized PtCo/GR catalysts with the Pt:Co molar ratios equal to 1:3 and 1:6 exhibited an enhanced electrocatalytic activity for methanol electro-oxidation as compared with that of catalysts with the Pt:Co molar ratios equal to 1:20, 1:50 and 1:60 and 1:0.
Evaluation of yeast capability to assimilate various carbohydrates by menadione-mediated amperometry
Authors: Garjonytė Rasa , Melvydas Vytautas , Malinauskas Albertas
Published: January 2025

Menadione-mediated amperometry at carbon paste electrodes containing yeast Kluyveromyces lactis grown on different carbon sources (glucose, galactose or maltose) was exploited to monitor intracellular redox activity induced after yeast subjection to several monosaccharides (glucose, fructose, galactose) and disaccharides (sucrose, maltose, lactose). Higher electrode responses to galactose and lactose or maltose for yeasts grown on galactose or maltose, respectively, compared to those obtained with yeasts grown on glucose, indicated the influence of a carbon source on yeast capability to utilize carbohydrates.
The self-healing ability of cerium oxide films on carbon steel
Authors: Girčienė Olga , Gudavičiūtė Laima , Selskis Algirdas , Jasulaitienė Vitalija , Šakirzanovas Simas , Ramanauskas Rimantas 
Published: January 2025

Active corrosion protection of metals implies not only mechanical covering of the protected surface with a dense barrier coating, but also provides self-healing properties, which allow durable protection even after partial damage of the coating. The aim of the present study was to develop the deposition process of a chrome-free conversion coating on carbon steel and to study its self-healing capacities. The amorphous phosphate coating on carbon steel was chosen as the base for deposition of the cerium oxide films. The SEM, XRD and XPS techniques were applied for the structural, phase and composition characterization of the investigated coatings, voltametric measurements were carried out to determine the passive layer protective ability, while EIS studies yielded information on the self-healing properties of different protective systems affected by introduced artificial defects. The carbon steel and the phosphated carbon steel surfaces were modified with Ce ions by deposition of Ce films from the Ce(NO3)3 solution without and with SO42– ions. The presence of the SO42– ions in the conversion solution resulted in formation of the film, containing a larger amount of Ce, with respect to the pure Ce(NO3)3 solution and a higher amount of Ce4+ in the film. However, a low conversion films thickness and the presence of cracks yielded a lower level of steel corrosion protection. The increase of the low frequency impedance during immersion of the samples with a cerium film can be correlated to the active corrosion protection originating the self-healing of defects.
Preparation of CdS nanoparticles by microwave-assisted synthesis
Authors: Tamašauskaitė-Tamašiūnaitė Loreta , Grincienė Giedrė , Šimkūnaitė-Stanylienė Birutė , Naruškevičius Leonas , Pakštas Vidas , Selskis Algirdas , Norkus Eugenijus
Published: January 2025

n the present study a rapid microwave heating method was used to prepare CdS nanoparticles. The morphology, structure and composition of the prepared CdS were examined by means of field-emission scanning electron microscopy and X-ray diffraction. The optical properties of the CdS thin films formed and deposited onto glass substrates were investigated by means of UV/Vis spectrophotometric measurements.It has been found that the size and structure of CdS particles synthesized by rapid heating irradiation depend on the alkalinity of the reaction mixture and the microwave power. The synthesized CdS nanoparticles have a band gap of 2.5–2.7 eV.
Gas chromatographic analysis of polycyclic aromatic hydrocarbons in the disposed creosote treated wooden railway sleepers collected from several storage sites in Lithuania
Authors: Stankevičius Mantas , Maruška Audrius , Tiso Nicola , Mikašauskaitė Jurgita , Bartkuvienė Violeta , Kornyšova Olga , Mickienė Rūta , Bimbiraitė-Survilienė Kristina , Kaškonienė Vilma , Kazlauskas Mykolas , Levišauskas Donatas , Tekorius Tomas , Polcaro Chiara , Galli Emanuela , Donati Enrica , Zacchini Massimo , Ragažinskienė Ona , Snieškienė Vilija , Stankevičienė Antanina
Published: January 2025

This paper was presented in the 9th International Conference “The Vital Nature Sign”, held in Kaunas, 14–16 May 2015.The screening of PAH in used wooden railway sleepers treated with coal tar and creosote for their protection against biodegradation has been made. The analysis was based on cold solvent extraction and Soxhlet extraction of PAH using several organic solvents and analysis by GC-MS/GC-FID. For extraction several organic solvents of different polarity, including aromatic solvents, were tested. The results showed that aromatic solvents are the most efficient solvents for cold solvent extraction with the highest recoveries of PAH from wood matrix. Several PAH were identified. Naphthalene, acenaphthene, fluorene, anthracene, phenanthrene, fluoranthene, pyrene, crysene and benzo[α]anthracene were predominant. Thirty samples from Central Lithuania and twenty from the costal area were analyzed. Based on the results of chemical analysis the samples were classified using the cluster analysis according to several parameters including age, decay status and chemical composition of the extract of the sleeper. The composition of PAH varies between intact and rotten sleepers. Few sleeper samples differ from others with a strong coal tar odor and a dark color and very high quantities of PAH.
Naujų piridino dikarboksirūgštis skaidančių mikroorganizmų išskyrimas ir charak- terizavimas
Authors: Jakubovska Jevgenija , Meškys Rolandas
Published: January 2025

Recently isolated bacterial strain Rhodococcus jostii TMP1 proved to be capable of utilizing 1,8-cineole as its sole source of carbon and energy. Bioinformatic analysis of R. jostii TMP1 genome revealed a presence of a novel and more detailed Cin operon – CinTMP1. It was found that CinTMP1 operon contains genes which are known to be involved in biode­gradation of 1,8-cineole by Citrobacter braakii. The genes located in this operon – cinA1, cinB1, cinC1, cinD1 and cinBVMO – were proposed to encode putative cytochrome P450 (P450cin), cindoxin reductase, cindoxin, hydroxycineole dehydrogenase and Baeyer-Villiger monooxygenase, respectively. The expression of all recombinant enzymes, except for cindoxin reductase, as well as the coexpression of P450cin system, has been studied and optimized. Recombinant P450cin enzyme of R. jostii TMP1 catalyses the initial monooxygenation of 1,8-cineole, yielding 6-hydroxycineole. Furthemore, P450cin performs a subsequent alcohol oxidation to produce 6-ketocineole in Rhodococcus cells.
Varieties and chemical composition of magnetite in the Varėna iron ore deposit
Authors: Prušinskienė Sabina , Šiliauskas Laurynas , Skridlaitė Gražina
Published: January 2025

Magnetites of the Varėna Iron Ore Deposit (VIOD) were thoroughly investigated by the Cameca SX-100 microprobe at the Warsaw University and by the Quanta 250 Energy Dispersive Spectroscopy (EDS) at the Nature Research Centre in Vilnius, Lithuania. Four generations of magnetite were distinguished in the studied serpentine–magnetite ores (D8 drilling). The earliest, spinel inclusion-rich magnetite cores (Mag-1) might have formed during an early metamorphism and/or related skarn formation. They have the highest trace element (Si, Al, Mg, Ti, V, etc.) contents. Voluminous second magnetite (Mag-2) had replaced olivine, pyroxenes, spinel and other skarn minerals at c. 540 °C (Mag–Ilm geothermometer) and has trace elements washed out by hydrothermal fluids. The latest magnetites (Mag-3 and Mag-4) originated from the late thermal reworking by dissolution–reprecipitation processes. Some of the latest magnetites (Mag-4) are mostly related to the sulfide veins. As concerning the origin of the studied magnetites, they have similar trace element abundances as skarn magnetites, are in general Ti-poor. The Mag-1 is more than twice richer in Mg than the porphyry and Kiruna type iron ores. A slight enrichment in Al, Ti and V because of spinel and ilmenite inclusions may have caused the earliest Mag-1 to resemble the porphyry type ores, while the secondary Mag-2 has Al, Ca and Mn contents as low as the Kiruna type ores. Even though there are no precise age constructions for the iron ore formation process, it may be related to metamorphic, metasomatic and later hydrothermal processes, the last of which is assumed to have occurred during the c. 1.50 Ga within-plate AMCG magmatism.
La Dialéctica De La Epistemología En La Educación
Authors: Perrazo Eras Cristina Elizabeth , Almache Laica Ana del Rocío
Published: January 2025

La epistemología es una rama de la filosofía se encarga del estudio del conocimiento y de métodos utilizados para adquirirlo, tema importante para los filósofos a lo largo de la historia  dando lugar a teorías y corrientes de pensamiento, Platón y Aristóteles se preguntaron de la naturaleza del conocimiento y cómo se adquiere, en la Edad Media se centró en el estudio de la relación entre la fe y la época, en la moderna  René Descartes y John Locke se interesaron por la teoría del conocimiento y la relación entre la mente y el mundo exterior, el objetivo es entender y comprender como la epistemología y el conocimiento han ido evolucionado según las necesidades de la humanidad hasta llegar  a una investigación científica aplicada a la educación, desarrollando habilidades, capacidades y prepararlos para la vida, con métodos de observación, experimentos y análisis,  útiles para comprender el mundo y resolver problemas. La dialéctica de la ciencia y la educación se refiere a la interacción y el conflicto entre diferentes enfoques o perspectivas epistemológicas, la educación y la ciencia se ocupan de la naturaleza del conocimiento, cómo se adquiere y cómo se valida a través de un método de investigación científica.
Membangun Masa Depan
Authors: Herdi Ramon  , Mas Andika Fahreza  , Fadhilah Irawan  , Rifky Sultan Nico Sembiring  , Afni Suhaida  , Lutvi Noviyanti
Published: January 2025

Mastering English from an early age is an important factor in preparing children to face global challenges in the future. This research aims to explore effective English language teaching methods in local communities, especially for children aged 7-12 years from lower middle socio-economic backgrounds. A qualitative approach was used through participant observation, in-depth interviews, and documentation of learning activities for 3 weeks. The research results show that interactive methods, such as games, role playing, and the use of simple technology, can improve language skills, build self-confidence, and create an enjoyable learning experience. In addition, local community involvement and parental empowerment have proven to play an important role in supporting children's learning. These findings emphasize the need for collaboration between communities, educators, and families to create sustainable and relevant learning programs. With a needs-based and technology-based approach, English language teaching can be an effective tool for building a brighter future for children.
Case Study : The Impact of Blended Learning on Students' English Writing Skills
Authors: Leonny Raicella Sumbayak  , Anggraini Thesisia Saragih  , Christine Helena Natalia
Published: January 2025

This case study investigates the impact of blended learning on students' English writing skills, focusing on a group of third-semester students majoring in English Education. Blended learning, which combines traditional face-to-face instruction with online learning components, is explored as a pedagogical approach that enhances writing proficiency through increased engagement and personalized feedback. Data were collected through questionnaires administered to 20 participants, revealing that a significant majority of students perceive blended learning as a motivating factor that fosters their writing development. The findings indicate that this approach not only improves grammar and overall writing skills but also provides ample opportunities for practice and constructive feedback, which are essential for skill enhancement. Additionally, the study highlights the importance of a supportive learning environment that encourages collaboration and community among students. The results advocate for the broader implementation of blended learning strategies in English writing instruction, emphasizing their potential to empower students and improve their language acquisition outcomes. This research contributes to the growing body of literature on effective teaching methodologies in language education and underscores the need for continuous adaptation and innovation in instructional practices.
From Sentence to Short Paragraphs : Developing Writing Tasks for Beginner Learners
Authors: Luciana Luciana  , Zaitun Qamariah  , Novia Fitrian  , Tria Angela Kusumaningrum
Published: January 2025

This research explores strategies to support novice learners in developing their writing skills in the English Education Study Program at an Indonesian university, the Islamic Institut of Palangka Raya. Writing is often considered one of the most challenging aspects of language learning, requiring a combination of vocabulary knowledge, grammatical precision and structural coherence. The participants, five beginner learners, were selected using purposive sampling and underwent a writing task that progressed from sentence-level exercises to paragraph construction. Data were collected through semi-structured interviews and direct observation, and analyzed thematically. Findings showed that challenges such as limited vocabulary, grammatical errors, and psychological barriers such as low self-confidence hindered students' progress. Effective strategies included guided sentence construction, collaborative writing exercises, and exposure to structured templates and quality reading materials. The participants reported improved confidence and skills through positive feedback and step-by-step writing tasks. The findings suggest that integrating motivating and structured learning methods can significantly improve writing ability among beginners, contributing to their academic and personal growth.
The Influence of First Language on Second Language Pronunciation
Authors: Septa Aryanika
Published: January 2025

Pronunciation in a second language (L2) is often influenced by the first language (L1), which can hinder intelligibility. Indonesian speakers struggle with certain English sounds, such as /θ/ and /ð/, due to their absence in the L1 phonetic system. To identify the influence of L1 on L2 pronunciation in the context of English language learning in Indonesia and propose strategies to reduce negative transfer effects. This qualitative study used a case study approach, involving 9 students from an English club at XYZ School. A pronunciation test was conducted to measure phonetic transfer between L1 and L2. Results show that L1 phonetic transfer causes errors in specific phonemes. Words with higher phonetic complexity are more challenging to pronounce correctly. Negative phonetic transfer and a lack of prosodic training were identified as major obstacles. Context-based and intensive phonetic training significantly improves pronunciation skills. L2 pronunciation errors are strongly influenced by L1, phonetic complexity, and individual experience. Contextual learning and individualized approaches positively impact pronunciation improvement.
Development and Effectiveness of a Christian Parenting Coaching Capacity-Building Program
Authors:   Kor Parents Edu Assoc, Kim Mi Yang , Do Mi Hyang
Published: January 2025

The purpose of this study is to develop a program to improve the parenting coaching capacity of Christian parents with children and to test the effectiveness of the program. To this end, a program was developed and the experimental group and control group were each provided with a pre-test and a pre-test group. A follow-up survey was conducted, and a nine-session program was administered to the experimental group. As a result of the study, it was found that there were no significant differences in any of the seven sub-factors in the control group, whereas the experimental group showed significant differences in the five sub-factors of self-understanding, child understanding, self-growth, relationship formation, and growth promotion. Unlike existing parenting coaching programs that focus on general parenting or faith education, this program is a complex program that combines faith and nurturing, and it can be meaningful in that it is a new attempt.
The Multiple Mediation Effect of Mother's Smartphone Overdependence and Mother-Child Play Interaction in the Relationship between Parental Efficacy and Children's Smartphone Overdependence
Authors:   Kor Parents Edu Assoc, Hong Chan Young , Han Sung Hee
Published: January 2025

This study verified the multiple mediating effects of mother smartphone overdependence and mother-child play interaction in the relationship between parental efficacy and child smartphone overdependence. To this end, an online survey involving 209 mothers with infants was conducted using parental efficacy, infant smartphone dependence, mother smartphone dependence, and mother-child play interaction scales. The collected data were analyzed using SPSS 21.0 and the SPSS PROCESS Macro 4.2 programs. As a result of the study, first, it was found that parental efficacy was correlated with mothers' and infants' smartphone overdependence and mother-child play interaction. Second, there was a mediating effect of mothers' smartphone overdependence and play interaction in the effect of parental efficacy on child smartphone overdependence. In conclusion, if the mother's parental efficacy is high, the mother's dependence on the mother's smartphone is low, and the play interaction with her children is high, the child's dependence on the mother's smartphone may be low. Therefore, it was confirmed that parental efficacy, the mother's dependence on her smartphone, and play interaction are important factors for preventing dependence on smartphones in early childhood. This study is meaningful in that it provides basic data for preparing practical educational programs for mothers.
The Effect of Multicultural Education Beliefs and Multicultural Acceptance on the Multicultural Teaching Efficacy of Pre-Service Early Childhood Teachers
Authors:   Kor Parents Edu Assoc, Song Jin Suk
Published: January 2025

The purpose of this study was to investigate the possibility of causal relationships among multicultural teaching efficacy and related variables, multicultural education beliefs and multicultural acceptance and to provide basic meaningful data pertaining to the promotion of multicultural education for pre-service early childhood teachers. Data were gathered from 233 questionnaires presented to pre-service early childhood teachers who were studying in the Department of Early Childhood Education, using a survey questionnaire format. The data were analyzed using SPSS and t-tests, with ANOVA, a correlation analysis, and a multiple regression analysis also conducted. The major findings of this study were as follows; first, there was significant difference between teaching function in multicultural teaching efficacy and grades by pre-service early childhood teachers. Second, there were significant differences among teaching function efficacy and everyday life efficacy in relation to multicultural teaching efficacy and multicultural practice experience in pre-service early childhood teachers. Third, multicultural teaching efficacy was significantly correlated with multicultural education beliefs and multicultural acceptance. Fourth, multicultural education beliefs and multicultural acceptance were significant predicting variables with regard to the multicultural teaching efficacy of pre-service early childhood teachers. The findings show that it is important to provide basic data to understand and create multicultural education programs for pre-service early childhood teachers.
The Effects of Psychological Capital and Social Support of University Students on Occupational Engagement
Authors:   Kor Parents Edu Assoc, Lee Yu Gyeong , Won Kyung Rim
Published: January 2025

The purpose of this study was to examine the effects of psychological capital and social support on career involvement behavior using response data from 263 university students located in the Chungcheong area. Descriptive statistics, a correlation analysis, and a hierarchical multiple regression analysis were conducted and the results were assessed using SPSS 27.0. The findings showed that psychological capital had a positive effect on career involvement behavior, meaning that psychological capital is an important prerequisite for promoting career involvement behavior in college students. In addition, social support had a positive effect on career involvement behavior, initiating that when college students experience greater social support, their career involvement behavior becomes more active. Through these results, it was confirmed that psychological capital and social support are the main antecedent variables affecting career involvement behavior. Based on this, the necessity of various support measures was proposed to improve psychological capital and help college students perceive social support more clearly to support their career development.
A alimentação nos navios mercantes dos "rios da borracha"
Authors: Paião Caio
Published: January 2025

O artigo aborda a alimentação nos navios que operavam nos chamados “rios da borracha” na Amazônia, durante as primeiras décadas do século XX. Veremos como as refeições a bordo aparecem na literatura de viagem e na imprensa, analisando isso em um cotidiano de muitos dias sobre as águas. Discuto os problemas decorrentes da má qualidade e distribuição das rações pelas companhias e a precariedade dos espaços destinados ao preparo e consumo das refeições. Trata-se de motivos tradicionais de protestos a bordo. A intenção central é demonstrar que, mais do que transportar passageiros e mercadorias, o navio a vapor também foi um veículo de transmissão de culturas e valores alimentares, enraizados nos saberes indígenas e africanos, cruciais para sobreviver e resistir ao apagamento de outras realidades e temporalidades amazônicas.
Comunidade Quilombola do Matupiri:
Authors: Oliveira Georgio Ítalo Ferreira de
Published: January 2025

O presente artigo tem como título "Comunidade Quilombola do Matupiri: Um Quilombo Translocal no Amazonas, comunidade que está localizada no rio Andirá, município de Barreirinha, Estado do Amazonas. A pesquisa contou com a participação de alguns habitantes da comunidade, e de quilombolas que migraram para outros centros urbanos, pessoas com ancestralidade negra, protagonistas de sua própria história, e com forte lastro de resistência e luta em favor das comunidades tradicionais quilombolas da região.
Análise da influência das autorizações de exploração de madeira no desmatamento da Amazônia Legal
Authors: Silveira de Almeida Dayse
Published: January 2025

As áreas de floresta na Amazônia Legal vêm enfrentando aumentos na ocorrência de desmatamentos, seja por meio de corte raso, incêndios florestais, atividades de mineração e, até mesmo, corte seletivo para extração de madeira.  Essa é uma região que requer atenção pela riqueza da sua biodiversidade e, a análise dos fatores que influenciam no desmatamento se faz necessária para que se possa alcançar um desenvolvimento social e econômico na região, respeitando as suas características culturais e em consonância com a preservação ambiental. Neste artigo, analisamos a relação entre as autorizações para exploração de madeira e o desmatamento em um estado da Amazônia Legal. Observamos que algumas instâncias de áreas autorizadas estão localizadas em setores urbanos. Apesar (i) das áreas autorizadas em setores urbanos se aproximarem mais rapidamente dos desmatamentos que as áreas autorizadas em setores rurais e, (ii) dos setores urbanos que possuem áreas autorizadas se aproximarem mais rapidamente dos desmatamentos, do que os setores urbanos que não possuem áreas autorizadas, o que sugere uma pressão maior sobre o desmatamento nesses setores, o tamanho das áreas desmatadas próximas às áreas autorizadas em setores rurais são maiores. Além disso, observamos que os volumes de madeira transportados a partir de áreas autorizadas em setores urbanos são maiores que os volumes transportados a partir de áreas autorizadas em setores rurais, ou seja, grande volume de madeira extraída dessas áreas autorizadas é transportado legalmente. Assim, especulamos se, (i) as áreas autorizadas em setores urbanos podem ser responsáveis por pequenos desmatamentos próximos com autorização legal e, (ii) as áreas autorizadas em setores rurais com menor volume de madeira transportado e aproximação mais lenta com as áreas desmatadas, sendo as áreas de desmatamento próximas, maiores, podem ter relação com o desmatamento ilegal.