bluuebunny/crossref_metadata_2025 huggingface dataset:
Production of Algae-Based Carbon Black Pigment and Its Use in Carbon Neutral Printing Technologies
Authors: Gürsoy Derin
Published: February 2025

Within the scope of the project, we focused on the innovation potential in printing technologies, which is a common problem for all sectors, taking into account the contribution of chemistry to sustainability in innovation-oriented sectors. Based on the importance of microalgae in biomass, we obtained biochar for the production of carbon black pigment. Biochar provided an important result especially in the production of a pigment that has the potential to replace petroleum-derived carbon black pigment from fresh and salty algae such as Spirulina and Nannochloropsis. By using the raw pigment material we obtained together with environmentally friendly vegetable resins, we turned it into a product with low volatile organic compounds and no heavy metals. In this context, we examined the potential of the product formed in many dierent sub-elds of biochar printing technologies such as direct printing, UV curing and printing. With biocompatibility experiments, we also examined the status of the project in terms of human and environmental health. Thus, we have obtained preliminary findings on the transition from biomass to printing technologies, which has the potential for an important sectoral change. It will be possible to obtain more qualified and comprehensive products with future experiments. This transformation has the potential to affect many stakeholders for production and consumption.
ANNUAL ASSESSMENT OF FREE CO2 CONCENTRATION IN JAKHAM AND BHANWAR RESERVOIRS: A COMPARATIVE STUDY ACROSS MULTIPLE SITES
Authors:   Nirwan University Jaipur, Rajasthan, Choudhary Premlata , Sharma Deepak ,   Nirwan University Jaipur, Rajasthan, Dayma Jyotsna ,   Nirwan University Jaipur
Published: February 2025

This study examines the concentration of free carbon dioxide (CO₂) in Jakham and Bhanwar Semla Reservoirs across three different sites over the period of March 2023 to February 2024. By analyzing the monthly variations, spatial differences, and seasonal patterns, this research highlights the dynamic behavior of CO₂ within these aquatic ecosystems, providing valuable insights for water quality management and environmental sustainability
Nghiên cứu hiệu quả hoạt động của nghề câu tay xa bờ tại tỉnh Khánh Hòa
Authors: Phạm Thị Thanh Bình
Published: February 2025

This study employs an output-oriented Data Envelopment Analysis (DEA) approach to evaluate the operational efficiency of the offshore handline fishery in Khanh Hoa province during 2023/2024. Findings reveal that the average operational efficiency of the sampled fleet is 0.79, indicating that output could increase by up to 26% without additional input if vessels operated at optimal efficiency. Analysis shows that vessel size negatively impacts efficiency, with large-capacity vessels (over 450 CV)—despite receiving the most state support—exhibiting the lowest performance. This inefficiency is primarily attributed to the labor force's technical skills falling short of operational demands. Therefore, policies supporting the expansion of large-capacity offshore vessels must be integrated with strategies to enhance the skills and competencies of the fisheries workforce to ensure sustainable development.
Dự báo giá cổ phiếu CATL đóng cửa và các chiến lược giao dịch sử dụng XGBoost và thuật toán tối ưu hóa Optuna
Authors: Trần Bá Thuấn  , Trần Thị Diệu Thuần
Published: February 2025

This study employs the XGBoost algorithm, enhanced through hyperparameter optimization with Optuna, to forecast the closing stock prices of CATL and develop effective trading strategies. The XGBoost model achieved superior performance, with an R² score of 0.9201, a Mean Absolute Error (MAE) of 0.1982, and a Mean Squared Error (MSE) of 0.0825, outperforming benchmark models such as ElasticNet and Decision Tree. The resulting trading strategy generated actionable buy, sell, and hold recommendations over a 30-day horizon, aiding investors in profit optimization. The findings highlight the high prediction accuracy and stability of the XGBoost model, particularly when optimized with Optuna, thereby enhancing decision-making efficiency in stock trading. Nonetheless, the study underscores the potential for further improvement through the integration of advanced deep learning models, alternative optimization techniques, or ensemble learning approaches. Future research could also explore incorporating unstructured data to refine forecasting accuracy and expand the applicability of trading strategies.
Phân tích tác động của biến động ngoại tệ đến hiệu quả tài chính của các công ty xuất khẩu tại Việt Nam
Authors: ThS. Nguyễn Lâm
Published: February 2025

This study examines the impact of foreign exchange rate fluctuations on the financial performance of export companies, focusing on key financial indicators such as profits, revenue, costs, and liquidity. It aims to assess how exchange rate volatility affects these indicators and provides recommendations for mitigating associated risks. The study employs quantitative methods, including multivariate linear regression, to analyze the relationship between exchange rate movements and financial performance. Additionally, qualitative approaches, such as expert interviews and surveys of financial managers, offer deeper insights. The study focuses on large export companies in Vietnam over the past five years. Findings reveal that exchange rate fluctuations significantly influence profits and revenues, with import-dependent companies experiencing greater negative impacts due to their reliance on foreign currencies. Conversely, export companies may benefit from domestic currency depreciation, although the extent of this advantage depends on financial management practices and the use of hedging strategies. The study also highlights that exchange rate risks contribute to rising operational costs, particularly through increased foreign currency interest expenses and raw material import costs.
Vai trò của người có sức ảnh hưởng trong ý định mua sắm trực tuyến của thế hệ Z
Authors: Võ Minh Hiếu  , Nguyễn Duy Thanh*
Published: February 2025

Based on the theoretical frameworks of the Theory of Planned Behavior (TPB), the Theory of Reasoned Action (TRA), purchase intention, and related literature, this study examined the influence of social media influencers on the online purchase intentions of Gen Z. Using a dataset of 274 observations, the study tested its proposed research model through Structural Equation Modeling (SEM) analysis. The findings reveal that influencer credibility, influencer attractiveness, and electronic word-of-mouth (eWOM) positively affect attitudes of Gen Z toward the brand, which, in turn, significantly enhances online purchase intention.
Evaluating the effectiveness of village funds in enhancing community-based economic potential: A case study of Sriwijaya Village, Aceh Tamiang
Authors: Sahputri Sindi , Nurlina  , Hidayatullah
Published: February 2025

This study evaluates the effectiveness of village fund management in enhancing community-based economic potential in Sriwijaya Village, Aceh Tamiang Regency, based on the perceptions of local residents. The evaluation focuses on three aspects: the overall effectiveness of village fund management, its role in economic development, and the level of community participation. Using a quantitative approach, the findings indicate that village fund management is perceived as effective, with an overall index score of 67.06%. Specifically, the allocation of village funds for economic development achieved an effectiveness score of 74.22%, while community participation in fund management remains moderate, with a score of 49.82%. This study highlights the need for improved community engagement in fund management to optimize its impact on local economic development.
Oskeladden og dei gode hjelparane? - eit vitskapsteoretisk essay om etiske utfordringar i eit aksjonsforskingsprosjekt
Authors: Tuastad Lars
Published: February 2025

Vitskapsessayet tar utgangspunkt i aksjonsforskingsprosjektet med Me and The BAND`its, eit rockeband med bakgrunn i det landsdekkande prosjektet Musikk i Fengsel og Frihet. Aksjonsforsking er ofte prega av tette band og eit sterkt fokus på brukarmedverknad og likeverd i forskingsprosessen. Målet er å utvikle kunnskap saman som skal føre til endringar. Dette vil som regel alltid føre til at ein møter etiske utfordringar. I essayet vert etiske problemstillingar ved aksjonsforskingsprosjektet Me and THE BAND`its drøfta i høve dei etiske retningslinene for samfunnsvitskap, humaniora, juss og teologi (NESH) og den etiske tenkjaren Knud Løgstrup. Forfattaren føreslår i essayet at løysingar på etiske utfordringar ved aksjonsforskingsprosjektet Me And The BAND`its berre delvis er å finna i dei etiske retningslinene. Nokre av svara finn ein hjå Løgstrup. Men den største eksponenten for etiske løysingar finn ein kan hende mest av alt i bandfellesskapen Me and THE BAND`its."

Nøkkelord: Aksjonsforsking, forskingsetiske retningsliner, Løgstrup, tillit, kontekst.
SISTEM INVENTARIS BERBASIS WEB DI KANTOR FAKULTAS SAINS DAN TEKNOLOGI UNIVERSITAS IBRAHIMY
Authors: Mukhlis Mukhlis  , Firman Santoso
Published: February 2025

The inventory management information system at the Faculty of Science and Technology (Saintek) at Ibrahimy University is designed to facilitate the management of assets, including the recording of incoming goods, outgoing goods, loans, and returns. This study uses a qualitative method with data collection techniques through observation, interviews, and literature review. The result of this study is an information system capable of managing inventory efficiently and effectively, as well as producing accurate and timely reports. The system is designed using Data Flow Diagrams (DFD) and Entity Relationship Diagrams (ERD) to illustrate data flows and relationships between entities. With this system, it is expected to improve inventory management and support the smooth operation of the faculty
KAJIAN LITERATUR: PERAN ETIKA BISNIS TERHADAP KEPUASAN KONSUMEN
Authors: Queen Shakira Azzahra  , Meesy Anugrah Putri  , Salsabilla Ronardi  , Alvi Nabilah  , Agustiawan Agustiawan
Published: February 2025

This study uses a literature review method with data sources taken from scientific journals to gain a deeper understanding of the role of business ethics in consumer satisfaction. This study aims to examine the role of business ethics on consumer satisfaction through a review of relevant literature. Business ethics include moral principles applied in company activities such as fairness, honesty, responsibility and transparency. The results of the study indicate that the implementation of good business ethics can increase consumer trust, loyalty and create a positive perception of the company. In addition, consistent implementation of business ethics has the potential to reduce conflict with consumers and improve the company's reputation in the market. Literature analysis indicates a positive relationship between business ethics and consumer satisfaction; consumers tend to feel more satisfied when companies demonstrate a commitment to ethical values ​​in their business practices. This study provides valuable insights for companies to strengthen sustainable business strategies based on ethical values, with the aim of improving consumer experience and competitiveness in the market.
PENGARUH PERCEPTION OF ORGANIZATIONAL SUPPORT TERHADAP KOMITMEN AFEKTIF PEGAWAI DIMEDIASI OLEH INTENTION TO STAY PADA PONDOK PESANTREN JABAL NUR KANDIS SIAK
Authors: At Taqi Ghozi Asadullah , Nurfaisal Nurfaisal  , Adolf Bastian
Published: February 2025

This research aims to determine the relationship between Perception of organizational support and employee Affective Commitment through Intention to Stay at the Jabal Nur Kandis Siak Islamic Boarding School. The research method used is quantitative research. The population in this study were all employees and teachers who worked at the Jabal Nur Kandis Siak Islamic Boarding School. The sampling technique used was purposive sampling, so that a sample of 89 respondents was obtained. The data collection technique used was using a structured questionnaire. The instrument testing technique in this research is validity and reliability testing using PLS (Partial Least Square) as the measurement. The results of this research show that Perception of Organization and Intention to Stay have a direct and significant effect on the Affective Commitment of Employees and Teachers who work at the Jabal Nur Kandis Siak Islamic Boarding School. Likewise, Perception of organizational support has a significant direct effect on Intention to Stay and Intention to Stay has been proven to be able to mediate the relationship between Perception of organizational support and Affective Commitment of Employees and Teachers who work at the Jabal Nur Kandis Siak Islamic Boarding School.
SISTEM INFORMASI MANAJEMEN KEUANGAN DAERAH BERBASIS IT GOVERMENT UNTUK TRANSPARANSI PEMERINTAH DAERAH
Authors: Khumaidi Ahmad , Jeprianto Jeprianto , Andriyani Novita
Published: February 2025

Penelitian ini bertujuan untuk mengembangkan Sistem Informasi Manajemen Keuangan Daerah (SIMKDA) berbasis IT Governance dalam rangka meningkatkan transparansi dan akuntabilitas pengelolaan keuangan pemerintah daerah. Dengan menggunakan metodologi pengembangan sistem waterfall dan framework COBIT 5, penelitian ini mengimplementasikan sistem yang mengintegrasikan proses perencanaan, penganggaran, penatausahaan, dan pelaporan keuangan daerah. Hasil penelitian menunjukkan bahwa implementasi SIMKDA berbasis IT Governance dapat meningkatkan efisiensi pengelolaan keuangan sebesar 45%, mengurangi waktu pemrosesan laporan keuangan hingga 60%, dan meningkatkan tingkat transparansi informasi keuangan daerah hingga 80%.
Innovación, recursos naturales y manufactura avanzada: nuevos dilemas de la industrialización en América Latina
Authors:   Universidad Autónoma Metropolitana México, Dutrénit Dra. Gabriela
Published: February 2025

La industrialización ha sido históricamente considerada como motor del proceso de desarrollo. La evidencia muestra que los países latinoamericanos han tenido dificultades para avanzar en procesos de cambio estructural, basados en la industria, que superen equilibrios de bajo nivel de ingreso. Hoy se ha abierto una discusión sobre las estrategias potenciales para insertarse en una senda de desarrollo para América Latina. Mientras que en Estados Unidos y Europa ha resurgido la preocupación por fortalecer a la industria, particularmente al sector manufacturero, en la región se vislumbran dos enfoques: el modelo de desarrollo basado en los recursos naturales y el modelo basado en la industria manufacturera. Ambos ponen en el centro al conocimiento y la innovación, e incorporan a la industria manufacturera, pero mientras que el primero se plantea una mayor especialización hacia industrias basadas en recursos naturales, el segundo se inscribe en la tradición de la economía del desarrollo de poner a la industria como motor del proceso de desarrollo, y agregar valor a la industria existente. El objetivo de este trabajo es discutir algunos de los retos que afronta América Latina para agregar valor y acelerar el proceso de desarrollo, y analizar las ventajas y oportunidades de la propuesta de agregar valor a partir del desarrollo de la manufactura avanzada. El análisis se enfoca en el caso de México, aunque muchos de los argumentos son de utilidad para los países que han apostado a la manufactura.
Looking for a virtuous Pattern of Growth. Some Insights for Discussion
Authors:   Universidad de Valencia, Mas Matilde , Benages Eva ,   Universidad de Valencia
Published: February 2025

This paper addresses the current «manufacturing versus services» debate in relation to the question of how to unlock renewed economic growth, taking as point of departure the EC Communication For a European Industrial Renaissance. We present two criteria with which to evaluate the grounds for supporting economic sectors (either manufacturing or services): 1 The capacity to generate employment and 2 The ability to display a positive rate of productivity growth. The highly disaggregated PREDICT database is used in order to evaluate both sectors on these criteria. Our paper concludes that service sectors fulfil both of the above-mentioned criteria, whereas manufacturing sectors do not. The importance of service and manufacturing sub-sectors rooted in ICT and non-ICT R&D-intensive activities is also highlighted.
Aumento del nivel del mar en la costa vasca: una aproximación probabilística
Authors:   BC3, Sainz de Murieta Elisa , Abadie Luis María ,   BC3, Galarraga Ibon ,   BC3
Published: February 2025

El aumento del nivel del mar representa una de las principales amenazas del cambio climático para la costa vasca. En este artículo estimamos el valor medio esperado de aumento del nivel del mar en once localidades bajo tres escenarios de emisión, junto con dos medidas de riesgo que describen aquellos eventos de baja probabilidad pero de gran magnitud. Nuestros resultados para el año 2050 sugieren aumentos medios de entre 21-29 cm y valores extremos significativamente mayores, de 35-45 cm para el percentil 95 y de 40-52 cm para la media del 5% de los peores casos. Esta información puede ser muy relevante para el desarrollo de políticas de adaptación al cambio climático ya que permite una gestión del riesgo más adecuada, en línea con las aproximaciones empleadas desde la economía financiera.
German Hidden Champions: competitive strategies, knowledge management and innovation in globally leading niche players
Authors:   Centre for European Economic Research ZEW, Rammer Christian , Spielkamp Alfred ,   Westphalian University of Applied Sciences
Published: February 2025

Hidden Champions (HCs) are firms unknown to the wider public, but global leaders in the niche markets they serve. This paper looks at distinctive features of these firms, focusing on competitive strategies, knowledge management and innovation. Employing a unique data base on German firms, we identify a representative sample of German HCs and examine differences to other firms using a matching technique. We find that HCs’ competitive strategy rests on technology leadership and customisation. HCs are more open in their knowledge management, but without compromising control over the new product development process. HCs do not invest more into innovation, but achieve higher innovation success. The higher efficiency can be linked to their superior technological capabilities and to higher investment in human capital and HR management practices that mobilise the creative potential of their employees.
Impuestos energético-ambientales, cambio climático y federalismo fiscal en España
Authors:   Universidade de Vigo, Gago Alberto , Labandeira Xavier ,   Universidade de Vigo, Labeaga José M. ,   UNED, López Otero Xiral ,   UNED
Published: February 2025

Este artículo analiza las posibilidades de reforma de los impuestos energético-ambientales en España como parte de una estrategia más amplia de mitigación del cambio climático. Tras estudiar el contexto teórico de estos impuestos en un marco federal y algunas experiencias internacionales destacadas, el trabajo evalúa la viabilidad de estos impuestos en los ámbitos subestatales de gobierno. En España, la situación actual de estas figuras se caracteriza por el desinterés del gobierno central y la descoordinación de las iniciativas autonómicas. Este escenario requiere una reforma basada en la coordinación, que realice una asignación jurisdiccional adecuada y dote al sistema de flexibilidad para facilitar las iniciativas de las comunidades autónomas en este terreno.
¿Qué beneficio económico se consigue con la reducción de la contaminación del aire mediante el arbolado de Euskadi?
Authors:   Basque Centre of Climate Change BC3, García de Jalón Silvestre
Published: February 2025

Este trabajo determina la reducción de contaminantes del aire mediante los árboles en el País Vasco utilizando un modelo que simula el proceso de la deposición seca a nivel horario de material particulado (PM), dióxido de nitrógeno (NO2), ozono (O3) y dióxido de azufre (SO2) y estima su beneficio económico en función del número de personas expuestas a distintos niveles de contaminación. Los resultados muestran que no solo los árboles dentro de las ciudades son los que contribuyen a la reducción de la contaminación, sino, sobre todo, los bosques de alrededor de grandes núcleos urbanos. El valor económico de los árboles por reducir estos contaminantes en términos de beneficios para la salud humana se estimó en 102 millones de euros al año.
TROCANDO SABERES E CONSTRUINDO CONHECIMENTOS: A PARTICIPAÇÃO DE ESTUDANTES DA EFA PAULO FREIRE NA TROCA DE SABERES
Authors: Silva Fernanda Fernandes da
Published: February 2025

Este estudo tem como temática central acompanhar e problematizar a participação do jovem estudante de EFA, mais especificamente, os jovens da Escola Família Paulo Freire localizada no município de Acaiaca -MG, no evento agroecológico “Troca de Saberes”, que se realiza na programação da tradicional Semana do Fazendeiro, da Universidade Federal de Viçosa. A proposta do estudo foi acompanhar, observar e analisar a movimentação dos estudantes durante a realização da Troca de Saberes, com o intuito de identificar quais os benefícios que essa participação pode ou não trazer para a formação do estudante, bem como estes sujeitos significam o espaço. Essa pesquisa de caráter qualitativo apropriou-se dos seguintes instrumentos metodológicos: pesquisa bibliográfica e documental, a observação dos jovens durante a realização da Troca de Saberes e a realização de entrevista a fim de seguir “aquilo que eles experimentam, o modo como eles interpretam as suas experiências e o modo como eles próprios estruturam o mundo social em que vivem” (Bogdan e Bicklen, 2001. p. 51). Como resultado desse estudo, constatou-se que os jovens têm na Troca de Saberes um lugar de encontro e que o auxilia na formação do jovem enquanto cidadão e são sujeitos responsáveis pelas questões econômicas e sociais do Campo.
CURRÍCULO E ENSINO NA PRÁTICA DOCENTE
Authors: Silva Rosana Louzada Da , Santos Ruth Leia Pinheiro dos , Cardoso Maria Bárbara da Costa
Published: February 2025

Esta produção visa analisar a relação entre currículo e ensino na prática docente, destacando como a construção e implementação do currículo impactam diretamente o processo de ensino e aprendizagem, bem como, pontuar concepções de currículo, identificar os desafios e as possibilidades que os professores enfrentam ao articular as diretrizes curriculares com as necessidades e especificidades do contexto escolar. A metodologia utilizada baseou-se em uma abordagem qualitativa, com revisão bibliográfica e utilização com análise de documentos curriculares e entrevistas semiestruturadas realizadas com professores de diferentes etapas da educação básica. As análises focaram em compreender como os docentes percebem o currículo e de que forma adaptam suas práticas pedagógicas para torná-las mais efetivas e significativas. Os resultados indicam que, embora o currículo seja uma ferramenta fundamental para a organização do ensino, sua aplicação depende de uma interpretação crítica e contextualizada pelos professores. Além disso, a flexibilidade curricular é essencial para atender às diversidades culturais, sociais e individuais presentes nas escolas. Conclui-se que a formação continuada dos docentes e a construção coletiva do currículo são estratégias indispensáveis para fortalecer a prática docente e promover uma educação de qualidade.
Development of Serial Image Media in Character Building and Monotheistic Values in Early Childhood
Authors: Baiti Noor Baiti , Muhammad Yusuf  , Uswatun Nisa  , Muhammad Zulkarnaen  , Alifah
Published: February 2025

This study aims to develop an effective image media in teaching monotheistic values in early childhood, as well as to test the level of children's understanding of monotheistic values after using this media. The series of picture media was chosen because of its ability to present the abstract concept of monotheism concretely through an interesting visual narrative that is easy for children to understand. This study uses a development approach that involves needs analysis, media design, and validation and effectiveness tests in early childhood. The results is the series of picture media can improve children's understanding of the values ​​of monotheism, create an interactive learning atmosphere, and stimulate children's imagination and creativity. This media is expected to be an innovative solution in supporting Islamic education in early childhood, especially in building faith and noble morals.
ĐỔI MỚI QUẢN TRỊ CÁC TRƯỜNG ĐẠI HỌC ĐỊA PHƯƠNG TRONG BỐI CẢNH TỰ CHỦ GIÁO DỤC: THỰC TIỄN TẠI TRƯỜNG ĐẠI HỌC HỒNG ĐỨC
Authors: Bùi Văn Dũng
Published: February 2025

TTrong gần 3 thập kỷ qua, với khởi đầu là sự ra đời của Trường Đại học Hồng Đức (ĐHHĐ) được thành lập ngày 24 tháng 9 năm 1997, các trường đại học địa phương (ĐHĐP) đã từng bước khẳng định vị trí của mình trong hệ thống giáo dục đại học và đạt được những thành tựu đáng khích lệ trong đào tạo nguồn nhân lực, nghiên cứu, chuyển giao KHCN phục vụ phát triển kinh tế - xã hội địa phương. Mặc dù đạt được nhiều kết quả quan trọng, song trước yêu cầu của giai đoạn phát triển mới hiện nay, đặc biệt là trong bối cảnh tự chủ đại học được coi là xu thế phát triển tất yếu đã và đang đặt ra yêu cầu đổi mới quản trị của các trường ĐHĐP. Trên cơ sở chia sẻ kinh nghiệm đổi mới quản trị và tiến trình tự chủ của Trường ĐHHĐ, bài báo phân tích một số khía cạnh về đổi mới quản trị đối với các trường đại học địa phương trong bối cảnh tự chủ đại học ngày càng được mở rộng trong giai đoạn hiện nay.
RETRACTION: The Madwoman in the Attic: Tracing the Feminization of Madness From Ancient Myths to Shakespeare’s Literature
Authors: Zhang Luoxuan
Published: February 2025

In both the current social media context, where female victims of sexual assaults are often demonized as lunatic, and in literary works featuring the archetype of the “madwoman in the attic,” madness is frequently associated with femininity. It is an amplification of the traits society typically ascribes to femininity: uncontrollable emotions, irrationality, susceptibility to influence, and vengefulness when discredited. The trope of the madwoman in Victorian literature, epitomized by Bertha Mason in Jane Eyre, has been extensively explored in existing literature. This paper employs an intertextual analysis to extend the temporal scope of study further back, tracing the origins of madness in ancient Greek etymology and myths to the analysis of Ophelia in the Elizabethan era work Hamlet. The aim of this paper is to examine how the literary image of the madwoman has undergone semantic changes through intertextual relationships. This paper concludes that madness is inherently feminine, both from Greek etymological and religious origins; the narrative of the madwoman as both excessively and insufficiently feminine reflects the inherent contradictions in the patriarchal definition of femininity; by the Elizabethan era, the literary trope of female madness had evolved from a tool to cast women as “the other” into an opportunity to provide them with agency and validation. This thesis not only provides the marginalized and silenced image of the madwoman in literature with the representation it deserves, but also offers readers a new perspective to view madness as a form of liberation and a means of breaking free.
On-Off Water Level Control and IoT Monitoring for Aquaponics Systems
Authors: Fadil Muhammad , Ahmad Munir  , Muhammad Tahir Sapsal
Published: February 2025

Aquaponic system is a cultivation method that combines fish and plant farming or aquaculture and hydroponics that are mutually beneficial (symbiotic mutualism) at one time.  Aquaponic water level control to maintain water volume is still done using conventional methods. Therefore, this research aims to produce a good control system to control aquaponic water levels equipped with an on/off control system and can monitor watelevels remotely. This research method includes designing a control system for water level, functional test and performance test of the control system to aquaponics as well as data loss test and network delay to Thinger.io platform. The parameter observed was the water level. The results showed that the on/off control system was able to regulate the water level with no overshoot, the settling time reached for a height of 20 cm was 9 minutes, a height of 25 cm for 22 minutes and for a height of 30 cm for 34 minutes and the steady state error that occurred was still within the tolerance limit. The IoT system using the Thinger.io platform implemented is able to send data and store data during the testing process, and the Thinger.io platform can monitor water levels remotely and provide data in excel format. The test results of lost data with an average of 1.81% and delay testing with an average of 0.88%, based on data mapped every 6 hours, the largest percentage of lost data and delay occurs at 00.00 -06.00 GMT +8.
Datos sobre la biología trófica y reproductora de algunas especies de Bruchidius Shchilsky, 1905 (Coleoptera, Bruchidae)
Authors: Yus Ramos Rafael
Published: February 2025

Knowledge about biology of seed beetles (Coleoptera, Bruchidae) is scarce or non-existent in the vast majority of species of no economic interest. Data on trophic biology are confusing, mixing host species with refuge species. In recent years, an effort has been made to understand the biology of these insects, based on in vivo information. In this article we present observations on the trophic and reproductive biology of six species of the genus Bruchidius, made in the course of these studies.
A Heritage School for Young Korean American Students
Authors: Kim Younglong , Curry Katherine , Fiegener Ashlyn , Olsen Jentre , Egure Dominic
Published: February 2025

The purpose of this study is to understand how a local heritage school in a rural area supports young Korean American students’ learning of heritage language towards the maintenance of cultural identity through the lens of Self-Determination Theory. This study addresses three research questions: How has this Korean school nurtured student motivation for learning their heritage language and culture through competence support? How has this Korean school nurtured student motivation for learning their heritage language and culture through relatedness support? And how has this Korean school nurtured student motivation for learning their heritage language and culture through autonomy support? This study was guided by a qualitative case study following Merriam and Tisdell (2016) to produce a holistic description through multiple forms of data collection including interviews, observations, and document analysis. The findings provide the context of the heritage language learning experiences of young Asian American students in the United States, addressing their unique challenges. Findings also highlight that participation in the heritage school created a bridge, connecting Korean and American cultures with community, among a minority population in a rural area; built students’ self-identity; and enhanced the competence of participants’ mother-tongue-language as well as their cultural literacy. This study emphasizes the significance of creating environments where young Asian American students feel a sense of belonging to aid the development of these competencies, especially in rural areas.
IMPACT OF TRAINING AND DEVELOPMENT ON EMPLOYEES’ PRODUCTIVITY IN THE 21ST CENTURY
Authors: MOHAMMED NURA ADAMU  , ABDULLAHI IBRAHIM WUSHISHI  , ABUBAKAR UMAR FARUK
Published: February 2025

This study attempts to investigate the impact of training on employees’ productivity in the 21st century. The study area is Niger State Polytechnic Zungeru. The main purpose of this study is to assess the impact of training and development on employees’ productivity, and to examine further the relationship that exists therein. A survey design was adopted making use of sample survey to measure the variables and their relationships. The population of the study was 367 which comprises of academic staff of the institution from various departments and schools who undergo training via tetfund both locally and internationally between 2010 to 2023. Both stratified and simple random sampling technique was adopted in selecting sample size for the study. Sample size of the study was determined using Krecije & Morgan table which is 184. Both primary and secondary sources of data were utilized for the study. A structured questionnaire was developed and administered to the sampled respondents. The data from the questionnaire was analyzed through the use of simple percentages and hypotheses was tested using chi-square at 5% level of significance. The study revealed that the productivity of employees (Academic staff) in terms of enhanced knowledge, skills, teaching methods, quality research and additional certificates are positively related to training and development. It is recommended that Niger state polytechnic, Zungeru should be persistent in providing training for its academic staff to ensure optimal level of productivity, which will contribute to the successful achievement of the Polytechnic's overall objectives.
BACKWARD DIFFERENTIATION FORMULA FOR SOLVING SECOND ORDER ORDINARY DIFFERENTIAL EQUATIONS (ODEs)
Authors: BALA NAJAMUDDEEN  , KAMALUDDEEN UMAR DANMALAM
Published: February 2025

In this paper the derivation of a new numerical method for the numerical integration of second order ordinary differential equations (ODEs) is presented with variable step size strategy, the order of the method is two, and the stability analysis of the method shown that the method is zero stable and it is Convergent, therefore the method can serve as an efficient method for solving second order ODEs.
THE EFFECT OF SEWAGE EFFLUENCE ON THE PERMEABILITY OF SOIL
Authors: ABDULKARIM A. A.  , MOHAMMED T.N.  , ADEYEMI A. O  , OLAHAN A. B  , IBRAHIM R. A.
Published: February 2025

Sewage is water-carried wastes, in either solution or suspension that flow away from a community. Soil permeability is the ability of the soil to pass water under saturated conditions. This study addressed a critical environmental concern surrounding the potential impact of sewage discharge on soil permeability with a view to providing insights into the potential threats posed by sewage effluent on soil ecosystems, informing sustainable wastewater management practices and contributing to the broader discourse on environmental protection and resource conservation. This study therefore aimed to investigate the effects of sewage effluence on the permeability of soil. The samples collected for this study were soil, test specimen (laterite) and sewage effluence (collected from excavating up to depth of one meter below the ground surface in Federal polytechnic Offa and the disposal site at Owode market in abattoir, Offa, Kwara State). The lateritic soil samples were evaluated using standard analytical methods for moisture content, particle size analysis, Atterberg limit, liquid limit, plastic limit, plasticity index, compaction test and permeability test. The results of the varying analysis conducted on the lateritic soil showed that the lateritic soil has high water retention capacity, good particle size distribution which are suitable for use in road construction, plasticity index of the soil reduce when mixed with the clean water but increased when mixed with the waste water while the permeability of the soil sample decreased with increase in the percentage of sewage effluent used for the test. The study therefore concluded that permeability of any soil sample depended on the void ratio of the soil since water passed through only the voids present in a soil sample, the effect of pollution on permeability of soil should depend on the effect of the pollution on the void ratio of the sample, permeability of the soil sample was hindered by pollution. The study recommended that the research should be carried out using pollution of higher pollutant strength.
IMPACT OF FEDERAL CAPITAL DEVELOPMENT AUTHORITY LAND ALLOCATION AND ZONING PROCESSES ON URBAN PLANNING OF FEDERAL CAPITAL CITY, ABUJA NIGERIA
Authors: MOHAMMED IBRAHIM  , U. S. LAY  , EKPO A. S
Published: February 2025

This study investigates the Federal Capital Development Authority (FCDA) land allocation and zoning processes in the Federal Capital City (FCC) of Abuja, Nigeria, and assesses their impact on urban planning. Using a mixed-methods approach, the study combines both qualitative and quantitative research techniques to explore key objectives, such as identifying land allocation procedures, assessing stakeholder roles, evaluating zoning compliance, and developing a framework to improve FCDA’s effectiveness. Data collection involved analysis of official documents, interviews with FCDA officials, surveys, focus group discussions, and expert consultations. The study found that the zoning and land allocation processes have contributed positively to urban planning, with residential zones accounting for 45% of total land and green spaces covering 10% of the FCC, helping to maintain ecological balance and enhancing urban aesthetics. However, challenges such as urban sprawl, inequitable land distribution, and infrastructural imbalances were identified. Specifically, urban sprawl was linked to low-density developments, contributing to increase commuting times and higher transportation costs, while 30% of respondents reported perceiving favoritism in land allocations. Zoning compliance issues were also found, with residential zones showing a 15% incidence of unauthorized commercial activities, and green spaces facing a 40% non-compliance rate due to illegal developments. The study emphasizes the need for reforms, including enhanced transparency, stricter enforcement of zoning regulations, and increased stakeholder engagement. The research proposes a framework to improve governance, accountability, and sustainable urban development, offering actionable recommendations for the FCDA to strengthen urban planning practices in Abuja.
EFFECT OF GUIDED DISCOVERY STRATEGY ON SCIENCE PROCESS SKILLS ACQUISITION AND ACADEMIC PERFORMANCE AMONG SENIOR SECONDARY SCHOOL BIOLOGY STUDENTS IN KATSINA STATE, NIGERIA
Authors: BILKISU UMAR NAMANI  , SABIRU DAHIRU YUSUF
Published: February 2025

This study investigated the Effect of Guided Discovery Strategy on Science Process Skills Acquisition and Academic Performance Among Senior Secondary School Biology Students in Katsina State, Nigeria. The study has two research objectives, answered two research questions and tested two null hypotheses. The research design for the study was quasi-experimental and control group design involving pretest and posttest. The population of the study comprised of 12,328 (6,754 male and 5,574 female) SS II Biology students from 23 public senior secondary schools in Katsina Zonal Education Quality Assurance. The sample of 95 students which selected from the total population of 12,328  were drown from 23 core educational schools in Katsina Zonal Education Quality Assurance public seco-educational schools were selected using purposive sampling technique. A sample of (95) senior secondary school students consisting of 115 males and 67 females biology students were randomly selected and used for the study. The validated instruments  Biology Performance test (BPT) was used by the researcher for data collection with the reliability coefficient of 0.789 respectively. The research questions were answered using mean and standard  deviation while  the null hypotheses is tested at 0.05 level of significance using independent sample t-test. The findings of the study reveal that, there is significant difference in the mean science process skills acquisition and the mean score of academic performance of biology students exposed to guided discovery strategy and those exposed to conventional lecture method in favor of the students taught biology using guided discovery strategy. The study was therefore concluded that, Guided Discovery Strategy have significant effect on the students science process skills acquisition and academic performance in biology. It was recommended among others that, teachers of biology should expose students to Guided Discovery Strategy so as to improve their cognitive and psychomotor skills.
PSYCHOSOCIAL EFFECTS OF DRUG ABUSE ON UNDERGRADUATES STUDENTS’ ACADEMIC ACHIEVEMENT IN NORTH-EAST STATE UNIVERSITIES IN NIGERIA: IMPLICATIONS FOR COUNSELLING
Authors: USMAN MODDIBBO HANAFI
Published: February 2025

This study examines the psychosocial effects of drug abuse among undergraduate students in North-east Nigerian universities, highlighting its implications for guidance and counseling. A descriptive survey design was employed, involving a sample size of 900 students purposively selected from six tertiary institutions, including Adamawa State University, Gombe State University, and Borno State University. Data were collected using a validated questionnaire, Psychosocial Effects of Drug Abuse on Undergraduates (PEDAUS), with a reliability index of 0.79, established through a pilot study. Descriptive statistics and Chi-square were used for analysis at a 0.05 significance level. Findings reveal that peer pressure, easy access to drugs, and psychological challenges such as depression and loneliness are key drivers of drug abuse, while academic stress and lack of awareness were less influential. Marijuana, alcohol, and stimulants were the most commonly abused substances, consistent with prior studies. The extent of addiction was significant, with physical dependence, psychological addiction, and compulsive behaviors prevalent among students, exacerbating issues such as social withdrawal and academic decline. Social and psychological effects, including strained relationships, social isolation, and heightened anxiety, were also prominent. The study emphasizes the urgent need for targeted interventions, including peer-led education, psychological counseling, addiction recovery programs, and strict disciplinary measures. Universities must establish well-equipped counseling centers and collaborate with government agencies to enforce stricter drug policies and raise awareness about the dangers of substance abuse. These recommendations aim to mitigate the pervasive effects of drug abuse on student well-being and academic performance.
PREVALENCE AND RISK FACTORS ASSOCIATED WITH HIGH BLOOD PRESSURE AMONG UNDERGRADUATE STUDENTS IN IGNATIUS AJURU UNIVERSITY OF EDUCATION, RIVERS STATE
Authors: CHRISTIANA LEESI KPE-NOBANA  , OGOLO, IBIENYE IDAWARIFA
Published: February 2025

This study investigated the prevalence and risk factors associated with high blood pressure among undergraduate students in Ignatius Ajuru University of Education, Rivers State. The descriptive research design was adopted with a population which consisted of 8,740 undergraduate student resident in the hostels in Ignatius Ajuru University of Education in Rivers State. A sample size of 420 was used for the study using a multi-stage sampling procedure. Data was collected using a proforma and analyzed using percentage and chi-square test. The result showed that few of the respondents 55(13.9%) and 24(6.0%) had hypertension 1 for systolic and diastolic respectively; but more, 264(66.5%) and 222(55.9%) had normal blood pressure both for the systolic and diastolic reading. Thus, the prevalence of high blood pressure among undergraduate students in Ignatius Ajuru University of Education was low. The prevalence of hypertension 1 was more among those who smoke (40.0%), consume alcohol (18.9%), had a history of hypertension (17.2%) and aged 15-19 years (14.4%). Significant association was found between prevalence of high blood pressure and variables such as: alcohol consumption (X2-value = 7.60, df = 3, p<0.05), smoking (X2-value = 8.21, df = 3, p<0.05), and age (X2-value = 12.71, df = 3, p<0.05). It was concluded that, the prevalence of high blood pressure among undergraduate students in Ignatius Ajuru University of Education, Rivers State was low and the risk factors were alcohol consumption, smoking and age. It was recommended among others that the undergraduate students should identity peculiar triggers of high blood pressure in them such as alcohol consumption and smoking, by making constant observation and guiding.
ASSESSMENT ON THE LEVEL OF SATISFACTION OF ADULT SURGICAL PATIENTS WITH ANAESTHESIA CARE AT 68 NIGERIAN ARMY REFERENCE HOSPITALS
Authors: GANDU AMINU AHMADU  , OLUFEMI O. OYEDIRAN  , HAUWA A. GANDU  , PATIENCE OFUOMA AMOO
Published: February 2025

This research assessed the level of satisfaction of anaesthesia care among adult’s surgical patients at 68 Nigeria army reference hospital Lagos. The study employed descriptive cross-sectional design and a target population of 384 adult’s surgical patients. The instrument used for this study was a self-structured questionnaire with a reliability 0.7. Descriptive statistics was used to summarize the demographic data of respondents using frequency, proportion, mean, standard deviation and range at a significant level of 0.05. In which the findings showed a mean age of the participants to be 33.97 ± 12.28 years. Among them, the largest age group was 20-29, comprising 166 individuals. Gender distribution showed 168 males and 197 females. And 38.4% participants held tertiary qualifications. Among the respondents, 40.0% were satisfied with anesthesia care, 46.3% reported receiving adequate information that positively influenced their satisfaction, 38.1% were moderately satisfied with the quality of care, and 39.7% perceived effective communication by healthcare providers as satisfactory. Additionally, 46.3% found clear explanations of anesthesia procedures to enhance their quality of care. Three hypothesis were tested and the results showed that; there is no significant relationship between patients’ satisfaction with anaesthesia care provided (p= 0.01), there is no significant relationship between competence of anaesthesia providers and satisfaction (p= 0.01). Also, there is no significant relationship between satisfaction, perceived impact of effective communication and Competence of Anaesthesia Providers on quality of anaesthesia care (p= 0.01). In conclusion, the study highlights a high level of patient satisfaction with anesthesia care, high quality of care provided, and a significant positive impact of effective communication by healthcare providers on patient satisfaction. Therefore, the study recommended that; Hospitals should create enabling environment for implementing further strategies that enhance collaboration, improve training and pain management protocols to ensure patient satisfaction with anaesthesia care.
To Compare the Efficacy of Clomid and Letrozole in Polycystic Ovary Syndrome
Authors: Bashir Bushra , Shahdab  , Nisar Mehreen , Akbar Saima
Published: February 2025

Background: Infertility is a worldwide problem which has profound social and emotional implications for the affected individuals. The most common cause of medically treatable infertility is polycystic ovarian syndrome (PCOS). Anovulation is a major cause of infertility in patients of PCOS. Clomiphene citrate (CC) is known as one of the oldest drugs that has remained the standard choice for ovulation induction in such patients. However, about 15-20% of women do not ovulate on CC and are labelled as CC-resistant group. Another drug Letrozole has been recently introduced and is claimed to be superior to clomiphene citrate in ovulation induction. However, there was controversy in the existing literature and there was no such local published material available which necessitated the present study. The objective of this study was to compare mean number of mature follicle and endometrial thickness in infertile patients with polycystic ovarian syndrome receiving clomiphene citrate and letrozole.
Conclusion: In infertile patients with PCOS, letrozole was associated with significantly higher mean number of mature follicles (2.83±0.79 vs. 2.10±0.71; p=0.000) and mean endometrial thickness (9.17±1.86mm vs. 7.40±1.87mm; p=0.001) as compared to clomiphene citrate and this difference was significant across all age and duration of infertility groups.