E-Journal UMSIDA (Universitas Muhammadiyah Sidoarjo)
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The Impact of Corporate Social Responsibility Disclosure, Profitability, Leverage, Liquidity, and Sales Growth on Firm Value: Pengaruh CSR Disclosure, Profitability, Leverage, Liquidity, dan Sales Growth Terhadap Firm Value
No full textGeneral Background Firm value represents a key market-based indicator reflecting investor assessment of corporate performance and future prospects in capital markets. Specific Background In Indonesia, rapid growth of the capital market and sectoral expansion in industrials, consumer non-cyclical, and healthcare companies have intensified attention toward financial and non-financial disclosures associated with firm value. Knowledge Gap Prior empirical findings on the roles of corporate social responsibility disclosure, profitability, leverage, liquidity, and sales growth in shaping firm value remain inconsistent, particularly across specific IDX sectors and recent observation periods. Aims This study aims to examine the relationships between CSR disclosure, profitability, leverage, liquidity, and sales growth with firm value among companies listed on the Indonesia Stock Exchange during 2022–2024. Results Using 90 firm-year observations and multiple linear regression, the findings indicate that profitability shows a positive and significant association with firm value, while liquidity exhibits a negative and significant association; CSR disclosure, leverage, and sales growth demonstrate no significant relationships. Novelty This study provides recent sector-focused evidence highlighting the contrasting roles of profitability and liquidity within Indonesian listed firms during the post-pandemic period. Implications The results suggest that investors prioritize profit-generating capability over CSR disclosure and growth indicators, while excessive liquidity may signal inefficient resource allocation, offering insights for corporate financial management, investors, and regulators concerned with firm value formation.
Highlights:
Profit-generating capacity emerged as the strongest statistically supported driver of market valuation.
Excessive short-term asset holdings were associated with lower market appraisal.
Sustainability reporting and revenue expansion indicators were not decisive valuation signals.
Keywords: Firm Value, Profitability, Liquidity, CSR Disclosure, Indonesia Stock Exchang
Mechanical and Thermal Behavior of Epoxy Composites with Carbon Black
No full textGeneral background: Polymer composites are widely developed to meet structural and functional demands through tailored fillers. Specific background: Epoxy matrices combined with particulate carbon black offer tunable mechanical strength and thermal transport. Knowledge gap: The coupled compressive response and heat conduction behavior across varied carbon black loadings, including recovery phenomena, remains insufficiently clarified. Aims: This study examines compressive strength and thermal conductivity of epoxy composites containing 0–9 wt% carbon black fabricated via hand lay-up. Results: Compressive strength peaked at 5 wt% carbon black, attributed to improved interfacial bonding and stress transfer, while higher contents reduced strength due to agglomeration. An unusual elastic-like recovery under compression occurred without catastrophic failure. Thermal conductivity increased monotonically, reaching a maximum at 9 wt% as conductive pathways developed. Novelty: The identification of pseudo-elastic recovery alongside opposing optima for mechanical strength and thermal transport provides a distinctive structure–property relationship. Implications: These findings guide composition selection for lightweight components requiring balanced load-bearing capacity and heat dissipation.
Highlights
Peak compressive strength achieved at 5 wt% carbon black.
Elastic-like recovery observed under compressive loading.
Thermal conductivity rises steadily with filler content.
Keywords: Epoxy Composites; Carbon Black; Compressive Strength; Thermal Conductivity; Particle Reinforcemen
Machine Learning: Algorithms, Real World Applications and Research Directions: Pembelajaran Mesin: Algoritme, Aplikasi Dunia Nyata, dan Arah Penelitian
No full textIn the era of the Fourth Industrial Revolution (4IR), vast amounts of data are generated from sources such as IoT, cybersecurity, mobile, business, social media, and healthcare. Artificial intelligence (AI), particularly machine learning (ML), is essential for analyzing this data and developing smart, automated applications. Various machine learning algorithms, including supervised, unsupervised, semi-supervised, and reinforcement learning, are used to enhance application intelligence. Additionally, deep learning, a subset of ML, can process large-scale data effectively. This paper provides an overview of these algorithms and their applications across fields like cybersecurity, smart cities, healthcare, e-commerce, and agriculture. It also discusses the challenges and research opportunities in the field, aiming to be a valuable resource for both academics and industry professionals, as well as decision-makers in various real-world scenarios.
Highlights:
Post-modern ceramics reflect features and connotations of body language.
Research explores theoretical framework, variables, and applications in ceramic sciences.
Results reveal key indicators, conclusions, and supporting references.
Keywords: Machine learning, Deep learning, Artificial intelligence, Data science, Data-driven decision-making, Predictive analytics, Intelligent application
Scientific-Theoretical Essence and Economic Foundations of Investment and Investment Attractiveness Concepts: Esensi Ilmiah-Teoritis dan Landasan Ekonomi dari Investasi dan Konsep Daya Tarik Investasi
No full textThis paper examines the fundamental cоncepts оf investment and investment attractiveness, fоcusing оn their scientific-theоretical essence and ecоnоmic fоundatiоns. The research analyzes variоus apprоaches tо understanding investment attractiveness, particularly in the cоntext оf industrial and mining sectоrs. Thrоugh a cоmprehensive review оf bоth fоreign and lоcal literature, the study investigates the key factоrs that influence investment decisiоns at bоth macrо and micrоecоnоmic levels. Special attentiоn is given tо the methоdоlоgical aspects оf assessing investment attractiveness, including the evaluatiоn оf investment pоtential, risk assessment, and the rоle оf variоus ecоnоmic indicatоrs. The paper alsо explоres the relatiоnship between investment attractiveness and sustainable ecоnоmic develоpment, highlighting the impоrtance оf creating favоrable investment envirоnments in develоping ecоnоmies. The findings suggest that investment attractiveness is a cоmplex, multifaceted cоncept that encоmpasses ecоnоmic, sоcial, pоlitical, and institutiоnal factоrs, all оf which play crucial rоles in determining the success оf investment strategies.
Highlights:
Investment attractiveness in industrial and mining sectors.
Reviews economic indicators, risk assessment, and investment potential.
Highlights role in sustainable economic development and policy-making.
Keywоrds: Investment attractiveness; Ecоnоmic develоpment; Investment pоtential; Risk assessment; Mining industry; Industrial develоpment; Fоreign investment; Investment climate; Ecоnоmic indicatоrs; Investment strateg
Inhibition of Propolis on the Growth of Aggregatibacter Actinomycetemcomitans: Daya Hambat Propolis terhadap Pertumbuhan Aggregatibacter Actinomycetemcomitans
No full textGeneral Background: Periodontitis, a chronic inflammatory disease, leads to tooth loss, with Aggregatibacter actinomycetemcomitans playing a key role in its pathogenesis. Specific Background: The rise of antibiotic resistance necessitates alternative treatments. Propolis, a bee-derived resin, has shown antimicrobial properties. Knowledge Gap: Limited research exists on the inhibitory effects of propolis against A. actinomycetemcomitans at varying concentrations. Aims: This study evaluates the antibacterial activity of propolis extract on A. actinomycetemcomitans in vitro. Results: Propolis exhibited significant antibacterial effects, with a minimum inhibitory concentration of 12.5% (125 mg/mL), attributed to flavonoids and apigenin. Statistical analysis confirmed significant differences across concentrations (p < 0.05). Novelty: This study highlights the concentration-dependent antibacterial efficacy of propolis against A. actinomycetemcomitans, suggesting its potential as a natural therapeutic. Implications: Propolis may serve as a complementary antimicrobial in periodontal therapy, reducing antibiotic reliance and resistance.
Highlights:
Effective Antibacterial Agent – Propolis inhibits A. actinomycetemcomitans growth at a minimum concentration of 12.5% (125 mg/mL).
Bioactive Components – Flavonoids and apigenin in propolis disrupt bacterial membranes and biofilm formation.
Clinical Potential – Propolis may serve as a natural alternative to antibiotics in periodontal therapy.
Keywords: Periodontitist, Propolis, Aggregatibacter Actinomycetemcomitans, Antimicrob
The Role of Advertising In Hotel Industry: Peran Periklanan Dalam Industri Perhotelan
No full textGeneral Background: The hospitality industry significantly contributes to the global economy, with hotels playing a crucial role in employment and revenue generation. However, maintaining a stable development and high occupancy rate in an increasingly competitive market remains a challenge. Specific Background: Marketing and advertising are essential tools for sustaining growth in the hotel industry. The rapid shift towards digitalization and changing consumer behaviors post-pandemic necessitate innovative marketing approaches to attract and retain customers. Knowledge Gap: While various studies have explored the role of marketing in hospitality, there is limited research on the effectiveness of emerging strategies such as AI-driven personalization, influencer collaborations, and user-generated content in hotel marketing. Aims: This study analyzes the significance of marketing and advertising in the development of the hotel industry and examines contemporary strategies that drive success in a post-pandemic landscape. Results: The findings highlight that SEO positioning, online advertising, influencer marketing, and AI-driven personalization are key factors in enhancing customer engagement, brand visibility, and revenue optimization. Furthermore, the study underscores the increasing importance of safety-focused marketing, user-generated content, and digital advertising in responding to evolving consumer preferences. Novelty: This research synthesizes existing knowledge while emphasizing the latest digital marketing trends and post-pandemic strategies that have not been widely examined in the context of hotel marketing. Implications: The study suggests that hotel businesses must adopt innovative marketing techniques to remain competitive in a digitalized and consumer-driven market. Given the reliance on secondary data, future research should incorporate primary data sources, such as surveys and case studies of specific hotel chains, to provide a more detailed understanding of marketing effectiveness across different regions and economic contexts.
Highlights:
Digital Marketing – SEO, influencers, and AI boost hotel visibility.
Post-Pandemic Trends – Safety, UGC, and personalization drive bookings.
Future Research – Case studies needed for deeper marketing insights.
Keywords: Hotel industry, marketing strategies, digital advertising, consumer engagement, post-pandemic trend
Factors Affecting the Increase of Professional Skills of Vocational Education Graduates: Faktor-Faktor yang Mempengaruhi Peningkatan Keterampilan Profesional Lulusan Pendidikan Vokasi
No full textGeneral Background: Vocational education plays a crucial role in workforce development by equipping graduates with the necessary skills for employment. However, ensuring that vocational training aligns with labor market demands remains a global challenge. Specific Background: In Uzbekistan, ongoing leadership reforms aim to bridge the gap between vocational education and industry needs. Despite these efforts, structural disconnects persist, affecting graduates' employability and professional development. Knowledge Gap: Existing research lacks comprehensive insights into the specific factors that influence the professional skill progression of vocational graduates in Uzbekistan. There is also limited empirical analysis on how labor market structures and educational frameworks interact to shape employment outcomes. Aims: This study analyzes the factors affecting vocational education graduates’ skill development and their transition into the workforce. By employing a systematic analytical approach, the research evaluates the effectiveness of vocational training institutions, labor market readiness, and socio-economic mechanisms that regulate employment. Results: Findings indicate that while vocational education centers successfully develop workforce readiness, their curricula do not sufficiently align with industry needs, limiting employment optimization. Financial constraints, restricted access to skill development programs, and inadequate career counseling were identified as major barriers. Additionally, job availability and entrepreneurial opportunities vary significantly across geographical regions. Novelty: This study integrates statistical data analysis, sociological surveys, and economic modeling to provide a multidimensional perspective on vocational training effectiveness. The use of data triangulation enhances the reliability of findings, offering a nuanced understanding of employment trends, skill shortages, and market-driven educational improvements. Implications: Strengthening educational-industrial collaborations, enhancing career guidance services, and implementing entrepreneurial development programs can significantly improve graduate employability. Policymakers should consider these insights to formulate targeted vocational training reforms that address industry demands and labor market dynamics effectively.
Highlights:
Vocational education misalignment with labor market needs.
kill gaps, financial barriers, and uneven job opportunities.
Strengthen industry collaboration, career counseling, and entrepreneurial programs.
Keywords: graduates of vocational education, professional abilities, employment, working conditions, new jobs
Strategic Deposit Policies for Liquidity, Profitability, and Financial Stability in Banks: Kebijakan Deposito Strategis untuk Likuiditas, Profitabilitas, dan Stabilitas Keuangan Bank
No full textGeneral Background: Deposit policy plays a crucial role in enhancing the resource capacity of commercial banks, influencing their liquidity, profitability, and financial stability. Specific Background: In an era of increasing competition and evolving customer expectations, banks must develop effective deposit policies to secure stable and cost-effective funding sources. Knowledge Gap: Despite extensive research on bank liquidity and financial management, limited studies comprehensively analyze the strategic impact of deposit policies on resource mobilization efficiency and risk management, particularly in emerging markets. Aims: This study examines the role of strategic deposit management in optimizing liquidity, profitability, and financial sustainability through econometric modeling and qualitative analysis. Results: Findings indicate that adaptive deposit policies incorporating behavioral finance principles significantly enhance customer retention and deposit growth. Comparative analysis of international best practices highlights the effectiveness of tailored deposit products and interest rate strategies in resource mobilization. Novelty: By integrating quantitative econometric models and qualitative insights from banking executives, this study provides a comprehensive framework for assessing deposit policy effectiveness. Implications: The study offers strategic recommendations for banks and policymakers to enhance deposit management through digital innovation and balanced regulatory frameworks, ensuring financial stability while promoting competitive banking practices.
Highlights:
Deposit policy enhances bank liquidity, profitability, and stability.
Examines strategic deposit management; finds behavioral finance boosts deposits.
Integrates econometrics and qualitative insights; informs policy and innovation.
Keywords: Deposit policy, liquidity management, profitability, financial stability, banking strategy
 
Tunable Charge Transfer and Photoluminescence in Quantum Dot–Graphene Hybrids: Transfer Muatan yang Dapat Disetel dan Fotoluminesensi dalam Hibrida Quantum Dot-Graphene
No full textGeneral Background: Quantum dots (QDs) and graphene have emerged as promising nanomaterials for optoelectronic and quantum applications. Specific Background: Their hybridization offers synergistic properties, yet understanding the mechanisms governing their electronic interactions remains limited. Knowledge Gap: The influence of screening effects, energy band alignment, and interfacial charge transfer dynamics in QD-graphene systems is not fully elucidated. Aims: This study aims to investigate the electronic, optical, and mechanical behaviors of QD-graphene hybrids through a combination of experimental characterization and computational modeling. Results: Using TEM, SEM, Raman, PL spectroscopy, and DFT-MD simulations, we demonstrate efficient charge transfer mechanisms—including Förster Resonance Energy Transfer (FRET) and direct charge injection—significantly modulate photoluminescence, electronic band structure, and charge carrier mobility. Screening length and temperature were shown to affect energy levels, occupation numbers, and density of states. Novelty: The study highlights the pivotal role of band alignment tuning and encapsulation strategies in enhancing the stability and functionality of QD-graphene interfaces. Implications: These findings provide a comprehensive framework for designing next-generation photodetectors, biosensors, and quantum computing devices, positioning QD-graphene hybrids as key materials for advanced nanoelectronics and photonics.
Highlights:
Problem: Limited understanding of charge transfer and screening effects
Approach: Experimental and computational analysis of electronic and optical properties
Impact: Enables advanced photonic, sensing, and quantum nanoelectronic applications
Keyword: Quantum dots, Graphene, Charge transfer, Photoluminescence, Band alignment
 
Adrenal Gland Dysfunction and Its Link to Endocrine Disorders: Disfungsi Kelenjar Adrenal dan Kaitannya dengan Gangguan Endokrin
No full textGeneral Background: The adrenal glands, also known as suprarenal glands, are vital endocrine organs located above each kidney. Specific Background: Comprising the cortex and medulla, these glands produce a variety of hormones essential for metabolic regulation, immune response, stress adaptation, and cardiovascular function. Knowledge Gap: Despite extensive research on adrenal hormone synthesis, a comprehensive understanding of how structural and functional alterations in these glands contribute to various endocrine disorders remains limited. Aims: This study aims to elucidate the correlation between adrenal gland composition, hormone secretion, and the manifestation of adrenal-related diseases. Results: Findings demonstrate that the adrenal cortex synthesizes steroid hormones—mineralocorticoids, adrenal androgens, and glucocorticoids—while the medulla produces catecholamines such as epinephrine and norepinephrine. Dysregulation in hormonal output is linked to disorders including Addison’s disease, Cushing’s syndrome, congenital adrenal hyperplasia, primary aldosteronism, and adrenal cancers. Novelty: This study provides an integrated perspective on the structural-functional relationship of the adrenal gland and its role in disease etiology. Implications: Understanding these mechanisms enhances diagnostic and therapeutic strategies for managing endocrine disorders associated with adrenal dysfunction.
Highlights:
Adrenal glands regulate vital hormones for body homeostasis.
Dysfunction causes Addison’s, Cushing’s, and adrenal-related diseases.
Insights aid diagnosis and treatment of endocrine disorders.
Key words: Adrenal gland structure , Corticosteroids, Catecholamines, Adrenal gland disorder