bluuebunny/crossref_metadata_2025 huggingface dataset:
Karakteristik Edible Straw dari Karagenan Setelah Penambahan Sorbitol
Authors: Savitri Nadiah Humairoh Mufidah , Sedjati Sri , Ridlo Ali
Published: February 2025

: Pemakaian sedotan plastik tidak hanya mencemari lingkungan namun juga dapat menyebabkan kematian pada hewan laut. Pemecahan masalah sedotan plastik telah dilakukan dengan mengganti bahan sedotan agar mudah terurai atau dapat dimakan (edible). Bahan yang telah digunakan untuk membuat edible straw misalnya karagenan yang diekstraksi dari rumput laut. Karagenan yang diekstraksi dari rumput laut Kappaphycus alvarezii paling banyak diproduksi dibandingkan jenis rumput laut lainnya. Kappa karagenan merupakan jenis karagenan hasil ekstraksi K. alvarezii dengan tingkat kemurnian tinggi. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan plasticizer sorbitol terhadap karakteristik edible straw yang meliputi kuat tarik, kelarutan, dan ketebalan. Metode penelitian mengacu pada eksperimental laboratoris dengan menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas 4 kelompok perlakuan yaitu sorbitol 0% (ESS0), sorbitol 2% (ESS2), sorbitol 4% (ESS4), dan sorbitol 6% (ESS6). Konsentrasi karagenan yang digunakan dalam penelitian ini sebanyak 1,5% pada setiap perlakuan. Hasil penelitian menunjukkan bahwa semakin tinggi penambahan sorbitol, maka kuat tarik semakin rendah namun kelarutan dan ketebalan meningkat. Formulasi terbaik didapatkan pada penambahan sorbitol 2% (ESS2) dengan kuat tarik 6,364 Mpa, kelarutan 41%, dan ketebalan 749,6 µm.
Indeks Kesehatan Ekosistem Lamun Pada Pantai Mrican dan Pantai Babakan Kulon, Kemujan, Taman Nasional Karimunjawa
Authors: Muhammad Ilman Fari , Riniatsih Ita , Suryono Chrisna Adhi
Published: February 2025

Lamun merupakan tumbuhan sejati atau Angiospermae yang mampu untuk hidup sepenuhnya terendam dibawah air laut. Ekosistem padang lamun merupakan salah satu ekosistem pesisir yang memiliki produktivitas yang tinggi. Saat ini, menurunnya luasan padang lamun menjadi perhatian dalam upaya konservasi ekosistem pesisir. Kegiatan penilaian kondisi ekosistem padang lamun penting dilakukansebagai langkah awal pada upaya rehabilitasi padang lamun. Penelitian ini dilakukan dengan tujuan untuk mengetahui nilai Indeks Kesehatan Ekosistem Lamun atau IKEL di Pantai Mrican dan Pantai Babakan Kulon, Kemujan, Kepulauan Karimunjawa. Parameter yang menjadi dasar dari IKEL adalah keanekaragaman jenis lamun, persentase tutupan lamun, kecerahan air, persentase tutupan epifit, dan persentase tutupan makroalga. Metode penelitian yang digunakan adalah observasi dengan penentuan lokasi menggunakan metode purposive sampling, dengan menetapkan (3) tiga stasiun pada setiap lokasi. Pengambilan data keanekaragaman jenis lamun, persentase tutupan lamun, persentase tutupan epifit, dan persentase tutupan makroalga menggunakan metode line transect dan transek kuadran berukuran 50x50 cm berdasarkan Buku Panduan Pemantauan Padang Lamun. Hasil penelitian menunjukkan terdapat 3 jenis lamun yang ditemukan di kedua lokasi, yaitu Cymodocea rotundata, Enhalus acoroides, dan Thalassia hemprichii. Persentase tutupan lamun pada stasiun 1 Pantai Mrican adalah 31,16% yang tergolong Sedang, pada stasiun 2 adalah 30,02% yang tergolong Sedang, dan Pada stasiun 3 adalah 36,17% yang tergolong Sedang. Pada stasiun 1 Pantai Babakan Kulon,nilai persentase tutupan lamunnya adalah 23,77% yang tergolong Jarang, pada stasiun 2 adalah 27,08% yang tergolong Sedang, dan pada stasiun 3 adalah 18,84% yang tergolong Jarang. Nilai IKEL pada stasiun 1 Pantai Mrican adalah 0,46 yang berstatus Buruk, pada stasiun 2 adalah 0,49 yang berstatus Buruk, dan pada stasiun 3 adalah 0,49 yang berstatus Buruk. Nilai IKEL pada stasiun 1 Pantai Babakan Kulon adalah 0,51 yang berstatus Buruk, pada stasiun 2 adalah 0,51 yang berstatus Buruk, dan pada stasiun 3 adalah 0,51 yang berstatus Buruk. Dampak kegiatan aktivitas Masyarakat pesisir dan kondisi parameter perairan yang buruk diduga memicu kondisi nilai IKEL yang buruk.
Hubungan Kerapatan Mangrove dengan Kelimpahan Gastropoda di Muara Sungai Dusun Tapak, Semarang
Authors: Adhirajasa Ardhan Khanza , Munasik Munasik , Hartati Retno
Published: February 2025

Ekosistem mangrove merupakan suatu ekosistem estuari yang memiliki peran penting bagi kelangsungan gastropoda. Gastropoda merupakan biota bertubuh lunak yang memiliki cangkang di luar tubuhnya sebagai tempat berlindung. Tujuan penelitian ini adalah untuk mengetahui jenis dan kelimpahan Gastropoda, kerapatan mangrove, serta hubungan kerapatan mangrove dengan kelimpahan Gastropoda di muara sungai kawasan hutan mangrove Dusun Tapak. Penelitian dilaksanakan di muara sungai Dusun Tapak, Semarang pada bulan November – Desember 2023. Metode penelitian menggunakan metode deskriptif kuantitatif. Terdapat 3 stasiun pengamatan berukuran 50 x 10 meter, dan tiap stasiun dibagi menjadi 3 sub plot berukuran 10 x 10 meter. Pengambilan parameter perairan dilakukan secara in situ dan analisis bahan organik dilakukan pada Lab. Biologi Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro. Hasil penelitian menunjukkan terdapat 10 spesies gastropoda dari 4 famili berbeda yaitu famili Potamididae, Assiminidae, Ellobiidae, dan Litorinidae, dengan nilai kelimpahan berkisar antara 0,62–7,6 ind/m². Hasil kerapatan mangrove di muara sungai hutan mangrove Dusun Tapak termasuk dalam kategori padat. Hubungan kerapatan mangrove dengan kelimpahan Gastropoda menunjukkan hasil yang berbanding lurus, dengan korelasi positif dan sangat kuat. Kualitas perairan di muara sungai Dusun Tapak menunjukkan hasil yang masih dapat ditoleransi oleh mangrove dan Gastropoda. Perolehan kandungan bahan organik berkisar antara 4,37 – 11,63% dengan kategori sedang hingga tinggi. Tipe substrat pada ketiga stasiun termasuk dalam kategori lumpur dan lumpur berpasir. Berdasarkan penelitian ini, disimpulkan bahwa kerapatan mangrove dan kelimpahan Gastropoda saling berpengaruh, di mana semakin tinggi nilai kerapatan mangrove maka semakin tinggi juga nilai kelimpahan Gastropoda.
Pengaruh Kerapatan Mangrove Terhadap Laju Transpor Sedimen di Kawasan Ekowisata Mangrove Oesapa Barat, Kota Kupang
Authors: Peny Mariana Naduasti , Rehatta Beatrix Maureen , Merryanto Yohanes , Tisera Wilson Lodewik , Anakotta Anthoinette Rosaline Fransisca
Published: February 2025

Penelitian mengenai hubungan kerapatan mangrove terhadap laju transpor sedimen di kawasan ekowisata mangrove kelurahan Oesapa Barat telah dilaksanakan pada bulan Mei – Juni 2022. Penelitian bertujuan untuk mengetahui hubungan kerapatan mangrove terhadap laju transpor sedimen menggunakan metode purposive sampling pada dua stasiun yang mewakili kerapatan tinggi dan kerapatan rendah. Setiap stasiun memiliki tiga transek dan sembilan plot pengamatan dengan ukuran plot 2x2 meter untuk semai, 5x5 meter untuk pancang dan 10x10 meter untuk pohon. Hasil identifikasi pada lokasi pengamatan menemukan empat jenis mangrove, yaitu Avicennia alba dari famili Avicenniaceae, Lumnitzera racemosa dari famili Combretaceae, Rhizopora mucronata dari famili Rhizoporaceae dan Sonneratia alba dari famili Sonneratiaceae. Kerapatan pada stasiun 1 sebesar 355,56 ind/ha memiliki laju transpor sedimen sebesar 0,0114 gbk/cm²/hari, sedangkan pada stasiun 2 nilai kerapatan sebesar 266,66 ind/ha dengan laju transpor sedimen 0,0230 gbk/cm²/hari. Hasil analisis Pearson untuk hubungan kerapatan mangrove terhadap laju transpor sedimen senilai -1 yang berarti kerapatan yang semakin tinggi menyebabkan laju transpor semakin rendah dan sebaliknya.
Development and Psychometric Properties of an Instrument for Assessing Group Processes in Collaborative ProblemSolving in Higher Education
Authors: López-Cruz Mauricio , Sánchez-Gómez Victoria , Cabello Patricio
Published: February 2025

This article aimed to develop and analyze an instrument for assessing group processes involved in collaborative problem-solving tasks in higher education. The Scale for the Assessment of Group Processes in Collaborative Problem Solving (GROUPS) consisted of 24 self-reporting items grouped into four dimensions: Exploring and Understanding, Representing and Formulating, Planning and Executing, and Monitoring and Reflecting. The study followed an instrumental design and took place in Chile. The test was administered to 939 higher education students, all of whom answered the instrument upon completing a 3-week task on collaborative problem-solving. The task was designed by the research team in collaboration with the students' teachers. Regarding validity, the instrument structure showed appropriate fit indexes according to the theoretical model’s four factors (RMSEA and SRMR under and SRMR under <.05; ; CFI and TLI over .95). The instrument also showed appropriate indices of reliability (ordinal alpha over .80 in all factors). The different group processes observed are described. Moreover, the instrument’s characteristics are discussed, as are the results obtained and their implications for developing collaborative problem-solving skills in higher education.
Examining the Link: Resilience Interventions and Creativity Enhancement among Undergraduate Students
Authors: Gowda Meghana , Gautam Ruchi
Published: February 2025

Background

Resilience, a dynamic and adaptable process, is defined as the ability to maintain or enhance creativity and think in a creative manner. However, thus far, no non-randomised controlled trials (n-RCTs) have examined the effect of resilience interventions on creativity among university students. This experimental study aims to determine the effect of resilience therapy on creativity among undergraduate students. To achieve this purpose, a n-RCT was carried out with the intervention arm receiving Resilient Therapy (RT) (n = 21), and a control group (n = 20). For eight weeks, the intervention group received the RT intervention. Questionnaires on demographics, the Wagnild and Young (1993. Development and psychometric. Journal of Nursing Measurement, 1(2), 165–178) Resilience Scale (RS-25), and the Creativity assessment were used to gather data before and after the RT session.

Results

The pre-test resilience and creativity scores did not show significant differences between the intervention and control groups. However, the post-test resilience score in the intervention group was notably higher than in the control group. Additionally, a comparison between the pre-test and post-test scores revealed a significant increase in both resilience and creativity scores.

Conclusion

RT significantly enhanced creativity. Further research is needed to address inquiries regarding the implementation and evaluation of resilience treatments. Future studies should encompass larger sample sizes and incorporate follow-up assessments. Analysing the assessment of functioning in clinical settings can provide insights into the impact of the RT program on clinical populations.
Zeros of linear combinations of Dirichlet 𝐿-functions on the critical line
Authors: Dousselin Jérémy
Published: February 2025

Let 𝐹 be a linear combination (of a certain form) of

N
≥
1

N\geq 1

Dirichlet 𝐿-functions attached to even (or odd) primitive characters.
Selberg proved that a positive proportion of non-trivial zeros of 𝐹 lie on the critical line.
Our work here is to provide an explicit lower bound for this proportion.
In particular, we show that the lower bound

2.16
×

10

−
6

/

(

N
⁢

log
⁡
N

)

2.16\times 10^{-6}/(N\log N)

is admissible for large 𝑁.
Breaking down barriers to warning technology adoption: usability and usefulness of a messenger app warning bot
Authors: Haunschild Jasmin , Henkel Markus , Reuter Christian
Published: February 2025

In crisis situations, citizens’ situational awareness is paramount for effective response. While warning apps offer location-based alerts, their usage is relatively low. We propose a personalised messaging app channel as an alternative, presenting a warning bot that may lower adoption barriers. We employ the design science research process to define user requirements and iteratively evaluate and improve the bot’s usability and usefulness. The results showcase high usability, with over 40 % expressing an interest in utilising such a warning channel, stressing as reasons the added value of proactive warnings for personalised locations while not requiring a separate app. The derived requirements and design solutions, such as graphically enhanced user interface elements as guardrails for effective and error-free communication, demonstrate that a suitable warning chatbot does not necessarily require complex language processing capabilities. Additionally, our findings facilitate further research on accessibility via conversational design in the realm of crisis warnings.
Continuation of solutions of elliptic systems from discrete sets with application to geometry of surfaces
Authors: Bukhgeim Alexander , Cheng Jin , Domme Cristina C. , Lu Shuai
Published: February 2025

We obtain new estimates of stability for the continuation of solutions of elliptic inequalities

|

∂
¯

⁢
u

|

2

⩽

a
⁢

|
u
|

2

|\bar{\partial}u|^{2}\leqslant a|u|^{2}

from finite discrete sets. For this, we use Hörmander’s type of Carleman estimates for

∂
¯

{\bar{\partial}}

with boundary terms and a special weight function equal to the linear combination of Green’s functions with singularities at points where our function is given. To estimate functions in a given domain we use not only the classical Blaschke partial sum

S
n

{S_{n}}

but we also introduce a new sequence of numbers

M
n

{M_{n}}

which gives us better estimates in the case of a finite number of observations.
Fenomenología y sentido: hacia una arquitectura sensible y transformadora
Authors: Fraile Narváez Marcelo Alejandro
Published: February 2025

El presente artículo propone un análisis profundo sobre la necesidad de una arquitectura sensible en el contexto contemporáneo, utilizando la fenomenología como herramienta conceptual para desafiar el enfoque geométrico-funcional dominante. A través de estudios de caso, se examina cómo la integración de experiencias sensoriales y emocionales transforma el espacio habitable en un organismo vivo en constante diálogo con su entorno y sus usuarios. La investigación resalta la relevancia de la memoria, la identidad y la percepción en la creación de espacios significativos, promoviendo una arquitectura que trasciende la mera funcionalidad para resonar con la subjetividad humana.
Las deficiencias urbanas sobre la carrera tercera de la ciudad de Ibagué (Colombia)
Authors: Guarnizo Sanchez Néstor Andrés , Ariza Rodríguez Misael Fernando , Vargas Cuaran Diana Marcela
Published: February 2025

El urbanismo y la planificación urbana son aspectos importantes para el desarrollo de las ciudades, pues buscan mejorar la calidad de vida de los habitantes mediante un diseño eficiente y equitativo del espacio urbano. No obstante, en lugares como la ciudad de Ibagué, se enfrentan a constantes deficiencias que afectan su correcta implementación generando conflictos sociales desde el centro urbano hasta las zonas de periferia. Este artículo se centra en analizar cómo estas problemáticas urbanísticas impactan negativamente sobre la carrera tercera de Ibagué, explorando sus causas, consecuencias y posibles soluciones desde la Arquitectura. Se abordará de manera descriptiva estas deficiencias en materia de planificación urbana, destacando la importancia de encontrar soluciones integrales para mejorar la calidad urbana de los ciudadanos y promover un desarrollo integral en la ciudad musical.
A few generalizations of Kendall’s tau. Part II: Intrinsic meaning, properties, and computational aspects
Authors: Manstavičius Martynas
Published: February 2025

Continuing our investigation on generalizations of Kendall’s τ, started in Part I of the paper, here we elaborate on the intrinsic meaning and degree of such polynomial-type concordance measures, as well as present many examples of their computation. In particular, we interpret generalized Kendall’s τφ as the difference between the average capacities of concordance and discordance, and, for power-type distortion functions φ, we obtain polynomial-type concordance measures of various degree, which could stimulate further research of their characterization as achieved for degree-one polynomial-type concordance measures by Taylor, Edwards, and Mikusiński.
Optimalisasi Produksi Seprai di UMKM Nikyta Seprai Dengan Metode Simpleks dan Branch and Bound
Authors: Oktavia Aulia , Putri Nurweni , Rina Iswan , Ikhsan Zahlul
Published: February 2025

Usaha Mikro, Kecil, dan Menengah (UMKM) memiliki peran penting dalam perekonomian global dengan memajukan pertumbuhan ekonomi lokal dan menciptakan lapangan kerja. Di tengah persaingan yang semakin ketat, UMKM perlu mengadopsi strategi efektif untuk meningkatkan produktivitas dan daya saing. Nikyta Seprai adalah sebuah UMKM di sektor tekstil di Kota Padang Panjang yang menghadapi tantangan dalam menentukan kombinasi produksi seprai yang optimal. Untuk mengatasi tantangan tersebut, metode optimasi, khususnya Integer Linear Programming, sangat penting untuk meminimalkan biaya bahan baku dan memaksimalkan keuntungan. Metode Simpleks dan metode Branch and Bound menawarkan pendekatan yang menjanjikan untuk mengoptimalkan produksi seprai di Nikyta Seprai. Artikel ini mengeksplorasi penerapan metode-metode tersebut di Nikyta Seprai, mengidentifikasi tantangan dalam proses produksi, dan mendemonstrasikan bagaimana metode optimasi dapat mengatasi tantangan tersebut, menghasilkan efisiensi produksi yang lebih baik dan keuntungan maksimum. Hasil analisis menunjukkan bahwa masalah penentuan kombinasi produksi seprai dan alokasi sumber daya untuk mendapatkan keuntungan maksimum di Nikyta Seprai yang diselesaikan menggunakan Integer Linear Programming, khususnya melalui metode Simpleks dan metode Branch and Bound. Solusi optimal menghasilkan keuntungan sebesar Rp 842.500, dengan jumlah produksi seprai karet sebanyak 10 buah, seprai rimpel sebanyak 1 buah, dan seprai 2 in 1 karet sebanyak 1 buah, dengan menggunakan software POM-QM V5.
Quantile Regression Analysis; Simulation Study With Violation of Normality Assumption
Authors: Hasibuan Lilis Harianti , Yanuar Ferra , Devianto Dodi , Maiyastri Maiyastri
Published: February 2025

Quantile regression is an extension method of simple linear regression whose work is to separate or divide data into certain quantiles. This method minimizes the asymmetric absolute residual and estimates the conditional quantile function. Parameter estimation in the quantile regression method does not require the parametric assumption of normality. The data in this study are generated from different distributions. The distribution of the independent variables in this study comes from the t distribution, normal and exponential distribution. Meanwhile, the error distribution comes from the chi square distribution. This research produces various models of the selected quantiles. The estimated parameter values at each quantile are almost close to the initial values set. This research found the best model at quantile 0.5 by looking at the smallest MSE value of all quantiles of 1.2662. The best model obtained is .
Analisis Algoritma LSTM dan SVR untuk Memprediksi Saham Perbankan di Pasar Indonesia
Authors: Agustina Dina , Sari Devni Prima
Published: February 2025

Penelitian ini membahas analisis komparatif algoritma Long Short-Term Memory (LSTM) dan Support Vector Regression (SVR) untuk memprediksi harga saham dari empat bankdi Indonesia: Bank BCA (BBCA.JK), Bank BNI (BBNI.JK), Bank BRI (BBRI.JK), dan Bank Mandiri (BMRI.JK). Studi ini dikarenakan semakin pentingnya prediksi harga saham yang akurat di pasar saham Indonesia untuk pengambilan keputusan yang lebih baik di sektor perbankan. Metodologi yang digunakan melibatkan pelatihan model LSTM dan SVR dengan menggunakan data saham historis dan mengevaluasi kinerja prediksi dengan menggunakan Root Mean Square Error (RMSE). Tujuannya adalah untuk mengetahui algoritma mana yang memiliki akurasi prediktif yang lebih baik untuk saham perbankan di pasar Indonesia. Hasilnya menunjukkan perbedaan yang mencolok dalam nilai RMSE antara model LSTM dan SVR pada bank-bank yang dipilih. LSTM menghasilkan nilai RMSE sebesar 84.2712, 103.7936, 15.5974, dan 26.8980 untuk masing-masing bank, sementara SVR menunjukkan nilai RMSE yang lebih rendah, yaitu 4.9627, 5.4234, 5.4234, dan 2.5470. Hasil penelitian menunjukkan bahwa algoritma SVR lebih baik dibandingkan LSTM dalam memprediksi harga saham perbankan, serta menunjukkan potensi penerapannya di pasar saham Indonesia untuk meningkatkan proses pengambilan keputusan investasi.
Museums as Spaces for History Learning and Educational Tourism : Shaping Students’ Creativity and Understanding
Authors: Sari Fiona Puspita , Saefudin Arif
Published: February 2025

Museums are often underutilised as learning resources, despite their great potential to enhance students' historical understanding and creativity. This lack of utilisation results in limited in-depth and enjoyable learning experiences for students. This research aims to identify the benefits of museums as a source of learning history and its role as an educational tourism destination. The method used is a qualitative method with data collection techniques through observation, interviews, and documentation. The results showed that museum visits as an outdoor learning model can improve students' understanding, create a more enjoyable learning atmosphere, and encourage student creativity. In addition, the museum also acts as an educational tourism destination that enriches people's insights about cultural heritage. The findings emphasise the importance of museum integration in the educational process and as a means of educational tourism, by providing practical recommendations for teachers and educational institutions to make optimal use of museums in learning activities.
Quasi-one dimensional and thee-dimensional simulations of gas turbine engine at the windmill modes
Authors:   Moscow Aviation Institute (National Research University), Agulnik Alexey , Rozhkova Margarita ,   Moscow Aviation Institute (National Research University), Tarmaev Amatoliy ,   Moscow Aviation Institute (National Research University), Borovikov Dmitry ,   Moscow Aviation Institute (National Research University), Donskikh Victor ,   Moscow Aviation Institute (National Research University)
Published: February 2025

The ability to restart the engine after its shutdown in flight has a significant impact on flight safety and is also one of the certification requirements for manned aircraft. Unmanned aircraft must be able to perform an emergency landing in the event of the impossibility of re-lighting the combustion chamber in flight, for example, when it is impossible to achieve the idle speed when engine is operating at the windmill modes. Compliance with these requirements is mandatory for aircraft certification. Confirmation of the required performance requires complex and expensive rig and flight tests. Preliminary assessment of engine parameters and performance in startup and windmill modes using mathematical modeling will reduce the number of full-scale tests, but requires refinement of existing calculation methods and mathematical models. In this work, simulation of two-shaft turbofan at the windmill modes is performed using an elemental quasi-one-dimensional mathematical model as well as a numerical study of the joint operation of a low- and high-pressure compressor of the engine at the windmill modes in threedimensional formulation. The nature of the flow of the main parameters of turbomachines is in good agreement with physical concepts about the operation of gas turbine engines at the windmill modes.
Analysis of ambiguous loading diagrams of advanced composites based on cross-sectional observations and critical value of cumulative acoustic emission energy
Authors:   Perm National Research Polytechnic University, Babushkin Andrey , Babushkina Anna ,   Perm National Research Polytechnic University
Published: February 2025

The methods and principles of complex analysis for determining or clarifying the bearing capacity or tensile strength of composites using additional registration systems with ambiguous diagrams are considered. The analysis and justification of the limited possibility of using the Vic-3D field analysis and deformation analysis system and the FLIR infrared thermal imaging system as additional measuring instruments has been carried out. The emphasized application of the AMSY-6 multichannel acoustic emission system as the most effective additional monitoring system for the deformation process is justified. As a result of the study of the mechanical behavior of samples of knitted 3D carbon fiber plastics for aviation purposes, according to standard methods, it was possible to formulate the concept of the critical value of the cumulative energy of acoustic emission for this structure and this type of loading as an acoustic analogue of the tensile strength (bearing capacity). A refinement of the proposed hypothesis is introduced for the mathematical specification of the right boundary of the critical value of the cumulative energy of acoustic emission. An algorithm for analyzing acoustic emission signals is proposed to determine the critical value of the cumulative energy from the beginning of loading to the expected maximum in the case of ambiguity of the diagrams. The algorithm for determining the critical value of the cumulative energy of acoustic emission is based on the approximation of the time sweep of the energy parameter by a polynomial function, the allocation of the primary localized array and the analysis of the extremes of approximation. Based on the critical value of cumulative energy, an algorithm has been developed to refine the material's tensile strength based on a comprehensive (cross-sectional) analysis of composite materials. A comparative analysis of the strength values (bearing capacity) obtained without the use and using the hypothesis for promising 3-D carbon fiber plastics for aviation purposes is carried out.
The influence of design parameters on the mechanical behavior of a prototype composite aircraft structure with controlled geometry
Authors:   Perm National Research Polytechnic University, Pisare Pavel , Nureeva Ekaterina ,   Perm National Research Polytechnic University
Published: February 2025

During flight, the helicopter rotor blades generate significant vibrations and noise due to changes in the aerodynamic loads acting on them when their azimuth angle changes. Various methods are used to reduce the resulting vibrations and noise. For example, with the advent of active materials, the concept of a rotor with active twisting was proposed. Actuators integrated into the rotor blade skin create dynamic twisting, which allows the blade to automatically adapt to changes in loads at any time, significantly reducing vibrations and noise, and improving flight performance. This paper is devoted to calculating the mechanical behavior of a prototype composite aircraft structure with controlled geometry with various design parameters. The problem statement for calculating the mechanical behavior of a prototype composite aircraft structure is formulated based on the thermo-piezoelectric analogy. This analogy allows replacing electro-elastic deformations with thermally induced ones. The developed numerical model of mechanical behavior of the prototype of composite aircraft structure with controlled geometry has been verified. As part of the verification, a numerical and experimental study of the mechanical behavior of a fiberglass sample was conducted. In addition, the influence of the adhesive layer on the deformation of the sample was taken into account during the verification of the model. A numerical study of the influence of design parameters on the nature of deformation of the prototype of a composite aircraft structure with controlled geometry was carried out. The design of the spar, the reinforcement scheme of the power shell of the prototype were considered as parameters. Based on the results of the numerical experiments, the design parameters of the prototype of a composite aircraft structure with controlled geometry were selected, allowing for achieving the largest twist angle. The results of this study can be used in the design of structures with controlled geometry.
EXPLORING STOCK MARKET RISK USING A GENERALIZED BREACH INDICATOR: EVIDENCE FROM INTERNATIONAL FINANCIAL MARKETS
Authors:   IIE Varsity College, South Africa, Enow Samuel Tabot
Published: February 2025

Stock market risk is of significant consideration in asset management, due to its direct link with
valuation. Risk in stock markets mostly arises from macro and micro policies which influence the
returns of an index. However, there is no real meaningful study that has estimated the extent to
which the realized returns exceed or fall short of the expected return in international stock
markets. The aim of this study was to explore market risk using breach indicators in the JSE,
Nasdaq, CAC 40, DAX, Nikkei 224, and BIST100 indexes. Using a sample period from January
2, 2018, to January 2, 2023, the findings revealed a significantly lower breach of expected returns
in the Nasdaq, DAX, and CAC 40 while the JSE was within range. This implies a significantly
larger than normal uncompensated risk involved in the Nasdaq, DAX, and CAC 40. However, the
Nikkei 225 and BIST100 displayed a significant positive breach of expected returns. The findings
of this study strengthen the debate that stock markets in developed countries are more
susceptible to risk and losses than stock markets in less developed countries. In essence, using
long-term moving averages will be useful in mitigating absurd price swings in the Nasdaq, DAX,
and CAC 40.
AN ANALYSIS OF SAVING PRACTICES AND PREFERENCES OF LOWINCOME EARNERS IN ESWATINI: A CASE STUDY OF TEXTILE WORKERS
Authors:   University of KwaZulu Natal, South Africa, Kwenda Farai , Sithole Siphesihle N. ,   University of Eswatini, Africa
Published: February 2025

This study analyzed the saving practices and preferences of low-income earners in the textile
industry in Manzini, Eswatini. The study analyzed three key fiscal management practices; saving
attitude, budgeting, and spending practices to determine whether low-income earners have good
or bad saving practices and preferences. The study adopted a quantitative research approach.
Self-administered questionnaires were used to collect primary data from 386 randomly selected
participants using the stratified random sampling technique. The findings indicated that lowincome earners have good saving practices and preferences. The t-test and ANOVA analysis
showed that the saving practices and preferences of low-income earners vary significantly with
their age, marital status, household size, education, income level and family background. Logistic
regression analysis results showed that household size, education and income level were the
only demographic variables that influence saving practices and preferences of low-income
earners. Based on the findings, the study concluded that in spite of their low income which
constraint saving, textile workers have good attitude saving.
Occupational therapy graduates reflections on working and their ability to cope with primary healthcare and rural practice
Authors: Naidoo Deshini , Van Wyk Jacqueline , Waggie Firdouza
Published: February 2025

Background: Occupational therapy graduates are expected to deliver service in public health facilities using a primary healthcare approach (PHC) during their community service year. There is limited literature available about their experiences in this context.Objective: This study explored the experiences of novice occupational therapy graduates and the extent to which their curriculum had prepared them for practice in PHC settings.Methods: This qualitative exploratory study used purposive sampling to recruit thirty nine novice occupational therapy graduates. Using audio-recorded semi-structured interviews and a focus group discussion data were collected to explore participants' experience of work and the extent to which their undergraduate programme had prepared them for primary healthcare practice. The data was analysed thematically.Findings: Occupational therapy graduates expressed challenges in applying the PHC approaches for practice in resource-rrestricted rural settings. They required additional skills to communicate in the local indigenous language, to understand the various beliefs of the local communities and to manage change in these settings. They were well prepared for basic clinical skills as a need for urban-based ethical practice.Relevance to clinical practice: Curriculum planners need to review the teaching of communication skills and introduce students to strategies for change management. More inter-professional collaboration and service-learning in rural primary healthcare settings will prepare them better for rural and PHC settings.
Key words: Occupational therapy education, Primary health care, rural practice , community service
Convergent validity of the Occupational Therapy Adult Perceptual Screening Test (OT-APST) with two other cognitive-perceptual tools in a South African context
Authors: Razemba Fadzai , Jacobs Lizelle , Franszen Denise
Published: February 2025

Background and aim: Occupational therapists working in the field of neuro-rehabilitation need to use screening tools which demonstrate validity and reliability to correctly identify patients with cognitive-perceptual impairments. The Occupational Therapy Adult Perceptual Screening Test (OT-APST) is a screening tool which was developed to identify patients with visual perceptual problems and apraxia following a stroke or other forms of acquired brain injury. Other instruments available are the Loewenstein Occupational Therapy Cognitive Assessment (LOTCA) and the Rivermead Perceptual Assessment Battery (RPAB). These tools evaluate similar constructs such as visual agnosia, body scheme, unilateral neglect and constructional skills but are too lengthy to use as screening tools.The aim of the study was to determine the convergent validity of the OT-APST with two other cognitive-perceptual tools commonly used in South Africa, namely the Dynamic Occupational Therapy Cognitive Assessment (DLOTCA) Â and the RPAB when administered to patients with a primary diagnosis of stroke.Method: A quantitative cross-sectional study was conducted on a sample of 32 participants with a primary diagnosis of stroke. Participants completed the three tools and subscales were compared with the Dynamic Loewenstein Occupational Therapy Cognitive Assessment (DLOTCA) cognitive areas and the RPAB items.Results: Five subscales of the OT-APST had significant correlations with similar DLOTCA and/or the RPAB subscales. Only the Apraxia subscale did not correlate with the referencing tools.Conclusion: This study provides further evidence of the convergent validity of the OT-APST when compared to the DLOTCA and RPAB. Although the OT-APST was standardised on an Australian population, it proved to be another option of a visual perceptual screening tool to identifying visual perceptual problems in patients with stroke in South Africa.Key words: Cognitive-perceptual, Stroke, convergent validity, Occupational therapy Adult Perceptual Screening Test (OT-APST), Dynamic Occupational Therapy Cognitive Assessment (DLOTCA), Rivermead Perceptual Assessment Battery (RPAB).
Visual perception of five-year-old English-speaking children in Bloemfontein using the Beery VMI-6, DTVP-3 and the TVPS-3
Authors: Visser Marieta , Nel Riette , Jansen Tasmia , Kinmont Lauren , Terblanché Susanna , Van Wyk Jorika
Published: February 2025

Background and aim: The Beery-Buktenica Developmental Test of Visual-motor Integration 6th edition (Beery VMI-6), Development Test of Visual Perception 3rd edition (DTVP-3) and Test of Visual Perceptual Skills 3rd edition (TVPS-3) are the latest editions of three commonly used visual perception tests, not yet widely studied in South Africa. Research on previous editions of these tests on South African children has been reported. The aim of this study was to investigate the new versions of the tests that have more recently become available in South Africa.
Methods: This article reports on a quantitative, cross-sectional investigation into the visual perception and visual-motor performance of five-year-old English-speaking children, by using the three tests mentioned above. Sixty-eight (68) children were selected from English Language of Learning and Teaching (ELOLT) Bloemfontein schools.  Children complete the tests according to the prescribed procedures, in a spedivid order and with adequate breaks between tests.
Results: The findings showed that the children's performance on the Beery VMI-6 and DTVP-3 compared well to the American normative sample. However, all the children in this study scored below average in all the subtests, with the exception of the test of visual memory, and all of the composite TVPS-3 scores.
Conclusions: The TVPS-3 should be used with caution and preferably not as the only visual perception measuring instrument.
Occupational therapists in South Africa should consider the suitability of the tests and develop instruments specifically appropriate for the South African context.
Key words: visual perceptual tests; visual-motor performance; five-year-old children; Beery VMI-6; DTVP-3; TVPS-3
Wytyczne projektowania, instalowania, uruchamiania, obsługi i konserwacji systemów integrujących urządzenia przeciwpożarowe
Authors: Śliwiński Robert , Gancarczyk Paweł , Zaciera Konrad , Ponichtera Agnieszka , Chojnicki Piotr , Sobecki Mariusz , Kunecki Krzysztof , Matuszewski Piotr , Pająk Andrzej , Sawicki Patryk , Starczak Rafał , Siuda Mirosław , Staniak Sławomir
Published: February 2025

Niniejsze wytyczne odnoszą się wyłącznie do systemów integrujących urządzenia przeciwpożarowe (SIUP), które przeznaczone są do monitoringu i sterowania tymi urządzeniami oraz: – podlegają procesowi krajowej oceny i weryfikacji stałości właściwości użytkowych na podstawie ustawy o wyrobach budowlanych oraz zgodnie z rozporządzeniem Ministra Infrastruktury i Budownictwa w sprawie sposobu deklarowania właściwości użytkowych wyrobów budowlanych oraz sposobu znakowania ich znakiem budowlanym jako wyroby budowlane z grupy „Stałe urządzenia przeciwpożarowe” oraz – posiadają świadectwo dopuszczenia CNBOP-PIB do stosowania w ochronie przeciwpożarowej. Zakres niniejszych wytycznych obejmuje integrację z elementami automatyki obiektu, które wymagają zrealizowania określonych działań w przypadku wykrycia pożaru w celu zapewnienia właściwego funkcjonowania systemu bezpieczeństwa pożarowego obiektu – zarówno w zakresie technicznym, jak i organizacyjnym. Integrowanie systemów automatyki obiektu niezwiązanej z ochroną przeciwpożarową pozostaje poza zakresem rozwiązań opisanych w niniejszych wytycznych. Wytyczne zostały opracowane w celu ułatwienia procesów: projektowania, instalowania, uruchamiania, obsługi i konserwacji SIUP. Obecnie brakuje dokumentu w języku polskim, który w sposób kompleksowy obejmowałby wszystkie zagadnienia związane z ich wdrażaniem i eksploatacją. Publikacja kierowana jest w szczególności do: projektantów, instalatorów, konserwatorów, rzeczoznawców do spraw zabezpieczeń przeciwpożarowych oraz funkcjonariuszy z pionów kontrolno-rozpoznawczych Państwowej Straży Pożarnej. Dokument może być również przydatny dla właścicieli i zarządców obiektów, w których zainstalowano SIUP oraz dla producentów elementów tych systemów. Przy opracowaniu wytycznych wykorzystano ponad dziesięcioletnie doświadczenie CNBOP-PIB w działalności certyfikacyjnej, laboratoryjnej, naukowo-badawczej w zakresie SIUP, a także doświadczenie projektowe i instalacyjne członków SITP.
CUTAC for FFPEs v2
Authors: Henikoff Steven
Published: February 2025

For more than a century, Formalin Fixed Paraffin Embedded (FFPE) sample preparation has been the preferred method for long-term preservation of biological material. However, the use of FFPE samples for epigenomic studies has been difficult because of chromatin damage from long exposure to high concentrations of formaldehyde. Previously, we introduced Cleavage Under Targeted Accessible Chromatin (CUTAC), an antibody-targeted chromatin accessibility mapping protocol based on CUT&Tag. Here we show that simple modifications of our single-tube CUTAC protocol are sufficient to produce high-resolution maps of paused RNA Polymerase II (RNAPII) at enhancers and promoters using FFPE samples. We find that transcriptional regulatory element differences produced by FFPE-CUTAC distinguish between mouse brain tumors and identifyand mapregulatory element markers with high confidence and precision, including microRNAs not detectable by RNA-seq.Our simple workflowsmakepossible affordable epigenomic profiling of archived biological samples for biomarker identification, clinical applications and retrospective studies.Version 2 includes improvements in both the on-slide and bead options and extension of the improved bead option to curls.
KAPP-Sen TMC: Term Placenta Subject Selection Criteria v2
Authors: Suvakov Sonja
Published: February 2025

Patient samples will be obtained during an elected cesarean (c-section) delivery. We will enroll an equal number of male and female fetuses.
Scoping Review Protocol: Bridging Generations Through Nature v1
Authors: Reyes Natalie
Published: February 2025

As the global ageing population grows and societal structures evolve, the need for meaningful intergenerational connections becomes increasingly important. Intergenerational practice (IGP) bridges this gap by fostering mutually beneficial interactions between generations.Nature-based IGP is an emerging approach, promoting connections not only between generations but also with nature. This scoping review systematically maps existing knowledge on non-familial nature-based IGP. A comprehensive search of English and Spanish peer-reviewed articles and grey literature identified 30 sources. Findings were categorised into four research streams: IGP, Environmental Education, Dual Approaches, and Design and Implementation. Results highlight the potential of nature-based IGP to address both social and environmental challenges through bi-directional learning, storytelling, and shared experiences. Small-scale, structured experiential learning also emerged as key to effective implementation. Significant knowledge gaps remain, however, and call for methodologically robust research exploring the synergistic effects of intergenerational nature engagement. Future studies should examine diverse cultural contexts and informal initiatives.
Oblique Agency: Mapping the Globalised Workflows of Television Dubbing and Their Impact on Practitioners
Authors: Knox Simone , Schwind Kai Hanno
Published: February 2025

This article offers a comprehensive analysis of how increasingly globalised infrastructures, marked by industry expansion, consolidation, and the impact of streamers, affect the workflows and practices within local dubbing industries. Informed by extensive, original interviews with managerial and creative dubbing practitioners, and industry fieldwork observations since 2017, the article is located within a post-Bourdieuian framework, exploring what significant change for the field and its habitus has meant for agency. Having identified a persistent lack of engagement with the dubbing of television in existing scholarship across several disciplines, the article considers how dubbing practitioners negotiate a wider industrial push towards more streamlining, standardisation, and more attendance to issues concerning equity, diversity, and inclusion. Here, the article offers the notion of oblique agency, to capture how creative agency is moved away from local creative practitioners, through more managerial oversight, prescriptive guidance and tools, and feedback cultures shaped by corporate agendas. Simultaneously, some agency is left to these practitioners, most acutely felt in the case of dubbing contemporary television (marked by narrative and tonal complexity), due to a lack of investment and recognition of dubbing as inherently creative. The article takes care to explore the complexities of these dynamics, especially a pronounced heterogeneity of views, including simultaneous criticism and enjoyment by creative practitioners, as well as a considerable gap between their perspectives and those of managerial practitioners. In this way, the article seeks to make a much-needed contribution to nuanced engagement with dubbing infrastructures and working practices.
Learning to Lead at the WHO: Thailand’s Global Health Diplomacy at the World Health Assembly
Authors: Harris Joseph , Thaiprayoon Suriwan
Published: February 2025

One of the largest delegations at the governing body of the WHO—the World Health Assembly (WHA)—hails from a small country in Southeast Asia. While Thailand’s presence through the 1990s was small, its delegation and engagement at annual WHA meetings grew substantially from the early 2000s through the 2010s, coming to rival that of the US. Thailand has tabled important resolutions at the WHA. The country serves on the WHO’s Executive Board; officials serve on politically sensitive drafting committees and have played important roles in high-profile resolutions. How and why did Thailand invest in building a presence at the WHO and what dividends have accrued from it? This article explores the development and growth of Thailand’s unique approach to global health diplomacy at the WHO, based on nearly 70 interviews with officials from the government, international organizations, non-governmental organizations, and academics. The country’s growing prominence at the WHA was part of a deliberate investment strategy that required sustained political and economic resources which allowed the country to play credible leadership roles and begin to take a proactive (rather than reactive) approach to set the global health agenda, attaining status through its growing “epistemic power” in the process.