Digital Commons Network^™

High-Frequency Gold Price Forecasting: Optimizing Multi-Layer Perceptron With Genetic Algorithm, Vrtagic Sabahudin, Fatih Dogan

Materials Science and Engineering Faculty Research & Creative Works

Accurately forecasting gold price actions is critical in financial markets due to gold's role as a safe-haven asset. This paper addresses the challenge of forecasting gold prices by applying a Genetic Algorithm (GA) with a Multi-Layer Perceptron (MLP) model. The research exploits historical financial data from various instruments, including gold futures, Bitcoin, and key currency pairs, to improve prediction accuracy. By optimizing the MLP's hyper parameters through GA, the model efficiently captures complex relationships in high-frequency data, achieving a remarkable R² score of 0.9993. This level of precision demonstrates the model's potential for providing actionable insights for traders and investors. …

Becoming Connective: Strengthening Diversity In Nursing Education, Melanie Jacobs

Electronic Theses and Dissertations Archive

Abstract Diversity in the nursing profession does not match the demographic of patients in the United States and correcting this mismatch could positively impact health disparities in the country. This post-intentional phenomenological study examines the current relationship between nursing education, as the pipeline into the profession, and students from underrepresented racial and ethnic (URRE) groups in the nursing profession to offer movement into the development of a stronger connection. In this qualitative study, phenomenological and poststructural tenets were used to seek the phenomenon of becoming connective, the creative tendency toward connection between URRE and nursing education. Data were generated from …

Tourism Carrying Capacity At Petungkriyono Forest And Its Supporting Areas, Nurwidya Ambarwati

Journal of Environmental Science and Sustainable Development

Supported by a variety of diversity and landscapes, the development of tourism in the Petungkriyono area is growing rapidly. Optimizing ecotourism services in the Petungkriyono forest without disrupting the ecosystem and damaging the environment can be done by limiting the number of visitors at tourism sites. This study aims to find out information about the tourism capacity of some tourist attractions in the local forest. This study uses the Cifuentes model to predict the maximum number of visitor capacities that can be accommodated in a tourist attraction called Physical Carrying Capacity (PCC), Real Carrying Capacity (RCC), and Effective Carrying Capacity …

Forecasting Air Pollution Driven By Vehicle Growth, Public Transport, Industry, And Household Waste, Chandra Harjono, Ludy Gianto, Rachmattullah Sidik, Dyah Lestari Widaningrum

Journal of Environmental Science and Sustainable Development

Jakarta, Indonesia's bustling capital, is grappling with escalating air pollution levels attributed to a confluence of socio-economic and infrastructural factors. This study employs Vensim modelling to project PM2.5 pollution trends through 2040, analysing the dynamic interplay among major contributors: increased vehicular emissions, industrial activities, public transportation deficiencies, and waste management inefficiencies. Materials and Methods: The method that will be used in this air pollution analysis is to integrate empirical data spanning three years to construct a predictive model underpinned by a robust causal loop diagram that elucidates the relationships between system variables and air quality. The results of this paper …

Finite Element Models For Predicting Moisture Effects On Bolt Embedment And Connection In Timber, Henry Meleki Kiwelu

Tanzania Journal of Science

The mechanical performances of timber connections are particularly important for timber engineers involved in the design of the wood structures. The mechanism of connection must be well understood in order to design a safer connection and avoid catastrophic failure. Often connections are made weak fuse elements by deliberate intent to ensure that if structural systems fail it will be by controllable ductile deformation of connections in load paths. Model method of determining engineering design capacities of laterally loaded dowel fasteners, such as bolts, screws and nails was developed. It should however be pointed out that FE and similar continuum model …

Design And Optimization Of Eco-Friendly Biocomposite Films For Packaging Applications Using Response Surface Methodology, Ba Omoike, Fe Okieimen, C Imoisi

Tanzania Journal of Science

The use of synthetic polymers as packaging materials constitutes environmental pollution due to the accumulation of plastic waste after they are discarded. This study aimed at preparing and optimizing an environmental-friendly carboxymethyl starch/PVA/kaolin composite film using response surface methodology to develop potential solutions for replacing synthetic packaging and optimize the formulation of the biocomposite films. The biocomposite films were prepared by solution casting method. The interactive effect of carboxymethyl starch (CMS) (2.0-5.0 g), poly(vinylalcohol) (PVA) (0.0-3.0 g) and kaolin (0.00-0.22 g) on the ultimate tensile strength (UTS), percentage elongation at break (%EB) and water vapour permeability (WVP) were determined. The …

Analysis Of Unsteady Convective Boundary Layer Flow With Magnetic Fields, Chemical Reaction, Thermal Radiation And Variable Fluid Properties, Jonas A. James, Makungu J. Ng’Oga, Augustino I. Msigwa, Ali A. Omary

Tanzania Journal of Science

This study extends the previous work by Kitengeso et al. (2018) by investigating unsteady convective boundary layer flow, incorporating magnetic fields, chemical reactions, radiation, and variable fluid properties over the inclined plate. The boundary layer and Boussinesq approximations are used to derive the magnetohydrodynamic flow equations. Thereafter, the equations are transformed into similarity form using similarity variables and then solved using the 4th order Runge - Kutta method. The key parameters such as the magnetic parameter, chemical reaction rate, variable fluid properties, unsteadiness, convection, and radiation parameter significantly affect flow behavior over an inclined plane. It was found that increasing …

Developing A Roadmap For Green Port In Timor-Leste, Emanuel Da Silva Maia

World Maritime University Dissertations

No abstract provided.

Development Of A Spray Pipe Evaporator For Application On Unproductive Salt Farm Land In Indonesia, Srie Muljani, Ketut Sumada, Alfian Rizki Pradana, Caecilia Pujiastuti

ASEAN Journal of Community Engagement

This article discusses the development of a prototype spray pipe evaporator and its efficiency in producing salt in Indonesia. Due to the length of the salt harvesting season in Indonesia, many salt farmers have closed their business doors, leaving many salt ponds abandoned. The spray pipe evaporator prototype was designed to produce a brine solution with a salinity of 23–24 Be from seawater, which has a salinity of 2.5–3.5 Be, in less than 3 days. This is faster than the conventional process of a brine solution salinity of 24 Be. The prototype spray pipe evaporator was assessed in a 20 …

Black Soldier Fly Larvae (Bsfl) Bioconversion For Circular Economy: A Study In Polaman Village, Siswo Sumardiono, Rizka Amalia, Syaikha Butsaina Dhiya’Ulhaq, Nurika Nazilatul Ilmi, Hermawan Dwi Ariyanto

ASEAN Journal of Community Engagement

Conventional organic waste management methods often lead to environmental degradation and underutilization of valuable resources. In rural areas, such as Polaman Village, limited awareness and inefficient disposal systems exacerbate these issues, thus necessitating innovative and sustainable solutions. This study explores black soldier fly larvae (BSFL) bioconversion as a community-based solution for organic waste management, addresses environmental challenges, and promotes economic empowerment by converting waste into valuable by-products. The study employed a mixed-methods approach, beginning with baseline assessments of waste generation and existing management practices to identify community needs. Educational workshops and hands-on training sessions introduced BSFL bioconversion techniques to local …

Assessing The Environmental Impact Of Municipal Solid Waste, Ojo Oluwayinka Florence, Olaniyan Olatunji Sunday, Akolade Adebola Saheed, Alabi Oluwaseyi Omotayo, Olaomotito Precious Adesope, Adebayo Kehinde John

Journal of Environmental Science and Sustainable Development

Municipal solid waste (MSW) management presents significant environmental challenges, especially with increasing urbanization and population growth. This study assesses the environmental impacts of MSW, focusing on waste composition, management practices, and their effects on air, water, and soil quality. The primary objective is to evaluate how MSW contributes to environmental degradation and to explore strategies for mitigating these impacts. A hypothesis was developed that optimizing waste composition through proper sorting and treatment can reduce the environmental footprint of MSW management by at least 10% in terms of leachate production and greenhouse gas emissions. Samples were collected using a randomized sampling …

Determining The De-Dieselisation Priorities Of Distributed Diesel Generators In An Electricity Company, Kresna Nurdianto, Ratih Dyah Kusumastuti

Journal of Environmental Science and Sustainable Development

The Indonesian Electricity Company (PLN) is one of the main players in the energy transition in Indonesia, and the company plans to achieve net zero emissions by 2060. One way to do this is by implementing the de-dieselisation program, i.e. reducing the use of diesel power plants (PLTD) with new energy and renewable power plants. The Indonesian electricity supply business plan (RUPTL) 2021-2030 targets the reduction of electricity supply from PLTD by 87% by 2030. The program requires a method to determine the order of priorities of PLTDs to be de-dieselised. This research uses multicriteria decision making, namely, analytical hierarchy …

Sustainable Practices And Green Marketing In Healthcare Sector: Visual Trends And Future Insight, Muhammad Alfarizi, Lissa Rosdiana Noer

Journal of Environmental Science and Sustainable Development

The healthcare sector faces critical challenges, including climate change, rising healthcare demands, and resource inefficiencies, making sustainability a priority. This study investigates the integration of sustainable practices and green marketing within the healthcare sector using a bibliometric analysis of 194 journal articles published from 2015 to 2024. Key research questions explore evolving trends, thematic areas, and gaps in the literature to address sustainability issues. The study employs a rigorous five-phase bibliometric methodology, utilizing Scopus database data and tools like Bibliometrix and VOSViewer to identify key themes and relationships. The research demonstrates an annual growth rate of 56.24%, reflecting the rising …

Sustainable Cities In Developing Countries: A Case Of Balancing Cultural Heritage Preservation And Tourism In Manila, Philippines, Geoffrey Rhoel C. Cruz, Ma. Divina Gracia Z. Roldan

Asia-Pacific Social Science Review

This study argues that heritage can work side-by-side with development, with culture and heritage serving as an integral part of the city’s economic backbone. A major challenge faced by developing countries is making their cities sustainable by preserving cultural heritage amidst demands for economic growth. This is experienced in the Philippines, with its capital city, Manila, as a case in point. Using a heritage-driven development framework developed by Zerrudo (2020), the paper examines how cultural heritage conservation and tourism development objectives affect the sustainability of cities in developing countries. The paper emphasizes culture as an important pillar of sustainable development. …

Length-Weight Relationship And Condition Factor Of Three Cichlids From The Tono Dam, Ghana, Emmanuel O. Kombat, Elijah D. Angyiereyiri, Sandra A. Atindana, Elliot H. Alhassan

Tanzania Journal of Science

The length-weight relationship (LWR) and condition factor of three Cichlids, namely, Sarotherodon galilaeus, Coptodon zillii and Oreochromis niloticus from the Tono dam in Ghana, were investigated. A total of 1,870 individuals of the target species were randomly collected from 20 artisanal fishermen using gill nets to fish from January to December 2015. Each species was sorted by sex, and each fish's total length (L) and body weight (W) were measured and recorded. Simple linear regression plots of weight against length were computed, and the slope of the regression line, ‘b’ and intercept of the regression line, ‘a’ of each species …

Identifying Factors Of Consumer’S Purchase Intention On E-Cars, Dhita Nur Maulida, Fatya Alty Amalia

ASEAN Marketing Journal

Manuscript type: Research Article

Research Aims: To evaluate the factors that can shape attitudes to use and purchase intentions for e-cars, either directly or through mediating variables.

Design/methodology/approach: Data were collected through a quantitative approach by administering a survey to 410 respondents, both those who already owned an e-cars and those who did not. Analyzed using the Partial Least Squares Structural Equation Modeling (PLS-SEM) method.

Research Findings: The output shows that Performance Expectancy and Social Influence significantly influence Attitude Toward Using and Purchase Intention. Meanwhile, Facilitating Condition positively affects Attitude Toward Using, but requires the mediation of Attitude Toward …

The Empowerment Of Consumers With Disabilities: The Role Of Self-Esteem, Accessibility, And Access To Information, Megawati Simanjuntak, Fauzia Rahmi, Santi Utami Dewi

ASEAN Marketing Journal

Consumer empowerment in Indonesia remains relatively low, particularly for individuals with disabilities. This study investigates the roles of accessibility, self-esteem, and information access in empowering disabled consumers. A total of 100 participants with physical disabilities, aged 17 and older, were surveyed regarding their online and offline purchasing experiences. Data were collected via an online questionnaire and analyzed using SEM PLS. Results indicate that self-esteem and information accessibility significantly influence the empowerment of consumers with disabilities, with the Disabled Consumer Empowerment Index categorized as "not empowered." Notably, the knowledge dimension received the lowest scores based on a traffic-light system. These findings …

Predicting Tuberculosis Vulnerability Based On Environmental Factors Using Multi-Criteria Analysis In Bukittinggi, Eka Budi Satria, Indang Dewata, Iswandi Umar, Nurhasan Syah, Linda Handayuni, Evi Hasnita

Media Kesehatan Masyarakat Indonesia

Tuberculosis is still an infectious disease problem and the main cause of death in Indonesia, where there was an increase in cases from 301 per 100,000 population (2020) to 354,000 per 100,000 population (2021), with the death rate increasing by 55%. This research aims to determine the TB vulnerability cluster influenced by the main risk factors, namely TB prevalence, cure rate, immunization, population density, and population arrivals in Bukittinggi, using the Weight Product (WP) analysis method, and then describe them by mapping tuberculosis vulnerability. The findings indicate that four sub-districts exhibit the highest levels of tuberculosis vulnerability: Tarok Dipo (0.0379), …

Modelling The Effects Of Antiretroviral Therapy On Kidney Diseases Among Hiv Infected Individuals In Tanzania, Janeth Pancras Mchwampaka, Eunice Mureithi, Nyimvua Shaban Mbare

Tanzania Journal of Science

This study examined the role of highly active antiretroviral therapy (HAART) in the dynamics of kidney diseases among HIV-infected individuals. A deterministic model was formulated for the dynamics of kidney disease in HIV-infected people with HAART as treatment in the model. Numerical simulations showed that though HAART reduces HIV progression to the AIDS stage, there is an increase in HIV-related kidney diseases. Also, the result obtained in this study showed that reducing the effective contact rate of HIV and improving the effectiveness of HAART by 99% in preventing the progression from HIV without symptoms group to HIV-related kidney diseases can …

Geochemical Characterization Of Hydrocarbon Source Rocks In The Jurassic – Cretaceous Ruvu Sub-Basin- Within The Coastal Basin Of Tanzania; Implications For Petroleum Prospecting., Hadija H Maumba, Charles H Kasanzu

Tanzania Journal of Science

In this study, we characterize hydrocarbon source rocks from the Ruvu sub-basin’s Kiwangwa well-1 using organic matter, total organic carbon (TOC), rock-eval pyrolysis and vitrinite reflectance data. Analytical results indicate fair to excellent TOC contents in the sub-basin, a feature suggesting conditions that favor organic matter production and preservation. Kerogen types II to IV are inferred for the Kiwangwa well-1 sediments. Using TOC vs S2 for the Early Jurassic and Triassic of Kiwangwa well -1 at depth intervals, good to very good source rocks are inferred. This suggests high generative organic matter suitable for hydrocarbon production. None generative organic matter …

Assessment Of Reactive Dyeing Of Cotton Using Seawater, Liberato V Haule

Tanzania Journal of Science

This study investigated the effects of auxiliary chemicals on reactive dyeing of cotton fabric using seawater as an alternative to freshwater. The study involved dyeing of 100% cotton fabric with reactive blue 21 using both fresh and seawater. The effects of Na2SO4, NaCl and Na2CO3 auxiliaries were assessed on dye exhaustion, fixation and colour strength. Reactive dyeing using seawater with a pH 9 which contained Na+ (882.4 mg/L), Cl- (938 mg/L), Ca2+ (1200 mg/L), CO3-2(3000 mg/L), Mg2+(1030 mg/L) and alkalinity (4615 mg/L), resulted in exhaustion rate of 54%, colour strength of 0.098 and fixation rate of 44%. While dyeing using …

Optimizing Co2-Expanded Hexane For Enhanced Yield And Antioxidant Activity Of Essential Oils From Citrus Reticulata, Mathayo Gervas Mathias, Idzumi Okajima

Tanzania Journal of Science

Wide range applications of citrus essential oil (EO) and environmental issues resulting from citrus processing industries render in the evolution of extraction techniques. The efficacy of the CO2-expanded hexane (CXH) extraction technique on mandarin orange EO, D-limonene, and total phenolic compounds (TPC) was evaluated and compared with conventional methods; hexane extraction and hydro-distillation. Moreover, the correlation of EO components with antioxidant activity was studied. It was revealed that CXH had better EO and D-limonene yields than conventional methods. The CXH optimal extraction conditions of 25 °C, 6.5 MPa, and 0.70 CO2 mole fraction offered 0.155 g-EO/g-dry peel and 51% D-limonene …

Metagenomic Analysis Of Bacterial Communities In Waters Of Lake Natron, Arusha, Tanzania, Sadikiel E. Kaale, Robert S. Machang’U, Thomas J. Lyimo

Tanzania Journal of Science

Metagenomics involves genetic material extraction and sequencing directly from environmental samples in order to gain insights and relationships that exist between microbes and their surroundings. Few studies have been done in extreme environments including soda lakes such as Lake Natron which is found in Arusha region, Tanzania. This study recorded high pH and salinity values confirming the lake's extremity. Full-length 16S rRNA reads sequenced through PacBio was used to reveal first metagenomic snapshots of bacterial communities from 10 random points at the lake shoreline waters. The results showed the dominance of Proteobacteria and Firmicutes with relative abundances of 98.46% and …

Behavioral Accounting As A Catalyst In The Organizational Transformation Process Toward Sustainability, Ni Wayan Yellow Prinsis Dayani, I Gusti Ayu Nyoman Budiasih

Jurnal Akuntansi dan Keuangan Indonesia

This research investigates the role of behavioral accounting as a catalyst in the organizational transformation process towards sustainability using phenomenological methods. The study aims to explore how behavioral accounting identifies individual behavioral factors, designs efficient sustainability systems, and enhances organizational commitment to sustainable practices. The research employs observation, secondary data analysis, and semi-structured interviews with organizational internal team, analyzed through Interpretative Phenomenological Analysis (IPA). Findings indicate that behavioral accounting contributes to organizational sustainability by enhancing transparency in accounting information, thereby minimizing the risk of fund misuse and ensuring efficient resource allocation. This research supports behavioral accounting as pivotal in shaping …

Catalyzing Meteorological Insights With A Cost-Effective Weather Monitoring System, Ariful Alam, Sidratula Muntaha, Poonam Munshi, Israt Khan, Rakibul Islam, Jamil Bhuian, Md.Yasir Arafat, Md. Ridwanul Hasan

Journal of Environmental Science and Sustainable Development

Undoubtedly, one of the biggest alarming phenomena of this decade is the tremendous fluctuations in the weather and climate. Therefore, different types of surveys, investigations, and research are required in this regard in every region. A low-cost weather monitoring system can be implemented in every educational and research institute to collect and analyze different types of weather-related data. This study establishes the method of developing such a system and analyzing data in a simplified way which the data gathered during thunderstorms and cyclonic activity in Bangladesh. The system was designed with Proteus 8 professional software and developed by using a …

Assessing Potential Energy Sustainability Of Micro-Hydropower System Through A Sustainable Indicator Approach, Icmi Alif Safitri, Muhammad Sulaiman, Rachmawan Budiarto

Journal of Environmental Science and Sustainable Development

The development of micro-scale renewable energy power generation systems, such as micro-hydropower (MHP), often needs more consideration for sustainability during the planning stages. Many small-scale renewable energy systems have shorter-than-expected lifespans, jeopardizing Indonesia's Net Zero Emission Target for 2060 or earlier. Despite this, only some studies have examined the long-term viability of installed renewable energy generation projects, particularly MHP plants not managed by state-owned companies or PLN (Pembangkit Listrik Negara). The primary objectives of this research are to evaluate the feasibility of retrofitting and assess the potential sustainability of a decommissioned MHP in Banjarnegara, Central Java. A cash flow analysis …

Impact Of Urban Development On Uv Exposure: A Clustering And Machine Learning Assessment, Taufik Roni Sahroni Mr., Verdi Yasin, Lulut Alfaris, Reza Ariefka, Ruben Cornelius Siagian, Mohammad Alfin Karim, Nana Rahdiana, Ade Suhara

Journal of Environmental Science and Sustainable Development

The relocation of Indonesia's capital city is anticipated to promote inclusive economic growth while embracing cultural diversity. However, this transition may affect ultraviolet (UV) radiation exposure patterns. The study investigated variations in UV exposure in the IKN region, focusing on urban development factors such as land use and population density that affect public health, sun protection, and skin cancer prevention. The research hypothesized that UV radiation is significantly correlated with these factors. UV Index data from 2010-2023, a hierarchical clustering method, identifies complex data patterns without determining the number of clusters. XGBoost, a machine learning model, was used for handling …

Road Safety Assessment For Accident And Non-Accident Cases Supporting Sustainable Development Goals 2030, Brian Nararya Nugraha, Sekar Warangi Nurcahyati, Hizkia Adhikaratma, Martha Leni Siregar

Journal of Environmental Science and Sustainable Development

Halving the number of global deaths and injuries from road traffic accidents is one target of the Sustainable Development Goals 2030, which is still a challenging problem in Indonesia. However, the majority of research on this topic uses accident-based methods, which limits the safety analysis. Two road safety assessment methods are used to close the gap, with the addition of non-accident-based methods such as Road Safety Audits (RSA). The Margonda Raya Road, which is categorised as a traffic accident blackspot, was selected for the case study. For this, a field survey of the road segment is carried out. To minimise …

Evaluation Of Microbial Contamination In Tube Well And Filter Water Of Lahore And Treatment With Copper Nanoparticles, Khadeeja Moazzam, Sumaira Mazhar

Journal of Bioresource Management

Water contamination is a global issue and different techniques are being devised to reduce water contamination. Among these techniques, use of nanoparticles for water purification is an efficient and cost-effective method with minimum or no side effect. Metal nanoparticles are known for their antibacterial activity against various pathogens. Synthesis of these nanoparticles using green synthesis methods minimizes the harmful effects while ensuring their antibacterial activity. Therefore, in the present work, it was aimed to evaluate the microbial contamination in water samples collected from different tube wells and filter plants located in different areas of Lahore, Pakistan for the isolation of …

Raw Milk Collection Diversity And Determinants Of Physicochemical And Microbiological Quality In Algerian Small Farms, Nasria Benamara, Houari Yerou, Hamza Belkhodja, Toufik Madani

Journal of Bioresource Management

Milk sector in Algeria presents lasting supply instability and its development policy has not achieved the expected results. The interest in developing local dairy production therefore has been a priority for public authorities. Our work aims to analyze raw milk collection diversity at the GIPLAIT dairy in Tizi (Mascara) and assess their physicochemical and microbiological quality. The typology of raw milk collection was determined from upstream, the farm to the dairy processing factory. The quality of the milk was determined by carrying out both physicochemical analyses (pH, Dornic acidity, butter content, protein content, density and total dry extract) and microbiological …