bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Confining Pressure on CO2-Brine Relative Permeability Characteristics of Sandstone in Ordos Basin
Authors: Tang Ligen , Ding Guosheng , Song Shijie , Wang Huimin , Xie Wuqiang , Zhou Yiyang , Song Zhiyong , Xie Chiyu , Song Hongqing
Published: December 2023

CO2-brine relative permeability significantly impacts CO2 injection and is a key parameter for carbon dioxide storage simulation in saline aquifers. In the study of relative permeability, factors such as temperature, pressure, and reservoir rock physical properties play a crucial role. To better understand the impact of confining pressure on the CO2-brine relative permeability characteristics of sandstone in the Ordos Basin, five sets of CO2-brine relative permeability data were obtained through unsteady-state displacement tests conducted at various confining pressures ranging from 12 to 20 MPa. The research findings indicate that with an increase in confining pressure there is a slight decrease in irreducible brine saturation. Furthermore, the CO2 relative permeability in the irreducible brine state decreased by 57% as the pressure increased from 12 MPa to 20 MPa. The study demonstrates notable differences in the CO2-brine relative permeability curves under varying confining pressure conditions. As the confining pressure increases, the CO2 relative permeability curve decreases, while the brine relative permeability increases. The change in brine relative permeability is not as pronounced as that of CO2. These experimental results offer essential support for subsequent numerical calculations and practical applications in engineering. Experimental research holds significant importance in the assessment of storage potential and the prediction of the evolutionary patterns of CO2 migration.
Reproducibility Starts at the Source: R, Python, and Julia Packages for Retrieving USGS Hydrologic Data
Authors: Hodson Timothy O. , DeCicco Laura A. , Hariharan Jayaram A. , Stanish Lee F. , Black Scott , Horsburgh Jeffery S.
Published: December 2023

Much of modern science takes place in a computational environment, and, increasingly, that environment is programmed using R, Python, or Julia. Furthermore, most scientific data now live on the cloud, so the first step in many workflows is to query a cloud database and load the response into a computational environment for further analysis. Thus, tools that facilitate programmatic data retrieval represent a critical component in reproducible scientific workflows. Earth science is no different in this regard. To fulfill that basic need, we developed R, Python, and Julia packages providing programmatic access to the U.S. Geological Survey’s National Water Information System database and the multi-agency Water Quality Portal. Together, these packages create a common interface for retrieving hydrologic data in the Jupyter ecosystem, which is widely used in water research, operations, and teaching. Source code, documentation, and tutorials for the packages are available on GitHub. Users can go there to learn, raise issues, or contribute improvements within a single platform, which helps foster better engagement and collaboration between data providers and their users.
Cross-Linked Cationic Starch Microgranules for Removal of Diclofenac from Aqueous Systems
Authors: Navikaite-Snipaitiene Vesta , Andriunaite Paulina , Rosliuk Deimante , Rutkaite Ramune
Published: December 2023

The occurrence of pharmaceuticals, such as anti-inflammatories, antibiotics, antidepressants, antihistamines, and others in the effluents, is a very urgent problem and a big challenge for municipal wastewater treatment companies. Without special treatment, these microcontaminants are retained in discharged water and sewage sludge and this is a high threat to the environment. Cross-linked cationic starch (CLCS) adsorbents with various degrees of substitution (DS) of cationic groups were employed for the removal of diclofenac from aqueous systems. The equilibrium adsorption studies revealed that the driving force of adsorption was the electrostatic interaction between carboxylate groups of diclofenac and quaternary ammonium groups of CLCS. The sorption capacities of CLCS with DS of 0.21 (CLCS-0.21) and DS of 0.33 (CLCS-0.33) varied from 329 to 370 mg/g and from 597 to 684 mg/g, respectively. The release studies revealed that adsorbed diclofenac can be efficiently released into 0.25 mol/L NaCl solution. Adsorbent regeneration studies showed that after four regeneration cycles, the ability of CLCS-0.21 and CLCS-0.33 to remove diclofenac from the aqueous medium decreased by 6% and 3%, respectively. To conclude, CLCS-0.33 exhibited high absorption capacity and sustainability due to good recoverability properties and can be regarded as a promising microcontaminant adsorbent to be used in wastewater treatment processes.
Experimental Study of Wave Overtopping Flow Behavior on Composite Breakwater
Authors: Adibhusana Made Narayana , Lee Jong-In , Ryu Yonguk
Published: December 2023

The safety of pedestrians on a breakwater structure or seawall is significantly influenced by two essential factors: the wave overtopping flow velocity (OFV) and the overtopping layer thickness (OLT). The main issue, however, is that most studies have predominantly focused on impermeable structures rather than composite breakwaters. This study conducted 55 physical experiments to investigate the OFV and OLT on a composite breakwater. The non-intrusive bubble image velocimetry (BIV) technique was employed to measure the OFV and OLT, as well as the plunging distance on the rear side of the structure. Empirical equations with two sets of dimensionless variables, the wave steepness and relative crest freeboard, were proposed as predictors. The results show that these two dimensionless variables perform well for both OFV and OLT estimation. The comparison between the proposed empirical equation and the available empirical equation in the literature is also presented. Finally, the proposed empirical equations were used to estimate the maximum instantaneous wave overtopping discharge and plunging distance. The findings of this research offer insights into the physical mechanisms of wave overtopping, providing an initial exploration into the design of composite breakwaters.
Combining Hydrological Modeling and Regional Climate Projections to Assess the Climate Change Impact on the Water Resources of Dam Reservoirs
Authors: Savino Matteo , Todaro Valeria , Maranzoni Andrea , D’Oria Marco
Published: December 2023

Climate change may significantly impact the availability and quality of water resources in dam reservoirs by potentially altering the hydrological regime of lake tributaries and the corresponding flow–duration curves. Hydrological models driven by climate projections (downscaled to the watershed scale and bias corrected to eliminate systematic errors) are effective tools for assessing this potential impact. To assess the uncertainty in future water resource availability, resulting from the inherent uncertainty in climate model projections, an ensemble of climate models and different climate scenarios can be considered. The reliability and effectiveness of this approach were illustrated by analyzing the potential impact of climate change on the water availability at Brugneto Lake in northern Italy. This analysis was based on climate projections derived from an ensemble of 13 combinations of General Circulation Models and Regional Climate Models under two distinct scenarios (RCP4.5 and RCP8.5). The semi-distributed HEC-HMS model was adopted to simulate the hydrological response of the basin upstream of the lake. The hydrological model parameters were calibrated automatically via the PEST software package using the inflows to the lake, estimated through a reverse level pool routing method, as observed values. Future water availability was predicted for short- (2010–2039), medium- (2040–2069), and long-term (2070–2099) periods. The results indicate that the uncertainty in reservoir inflow is primarily due to the uncertainty in future rainfall. A moderate reduction in water availability is expected for Brugneto Lake by the end of the current century, accompanied by modifications in the flow regime. These changes should be considered when planning future adaptation measures and adjusting reservoir management rules.
Spatial and Temporal Variation in the Fish Diversity in Dianchi Lake and the Influencing Factors
Authors: Zhao Kaisong , Li Xiaoqin , Meng Han , Lin Yuanyuan , Shen Liang , Ling Zhen , Zhang Xiaowei , Xu Shan
Published: December 2023

The survey of fish diversity is an important part of the protection of the ecological health of rivers and lakes. Environmental DNA technology is a new tool to improve the accuracy of traditional morphological surveys of biodiversity and to monitor the amount of diversity. At present, there are few studies on monitoring fish diversity in lake inlets using eDNA technology. In this study, we used various types of estuaries in the Dianchi basin as the research object, used environmental DNA technology to monitor the fish diversity in typical estuaries, and analyzed the temporal and spatial changes and the relationship between environmental factors and fish diversity. In the Dianchi basin, we identified a total of 63 fish species belonging to 8 different orders, 21 families, and 51 genera across two seasons. The Carpidae family had the highest number of species, with Carassius auratus being the most prevalent species. The Shannon index analysis yielded a p-value of 0.0018 (<0.05), suggesting significant seasonal variations in the fish community structure within the typical estuaries of the Dianchi basin. Furthermore, the β-diversity accounted for 59.6% and 57% of the variations in fish communities among the various estuary types in March and July, respectively. Fish species varied considerably between estuaries, with Carassius auratus, Cyprinus carpio, Rhodeus sinensis, Acheilognathus chankaensis, and Coilia nasus all occurring at various points. The agricultural estuary differed substantially from the urban, suburban, and lake areas. Redundancy analysis revealed that the fish community structure during the dry period was primarily influenced by total phosphorus, pH, total nitrogen (TN), and chlorophyll. Conversely, during the rich period, the fish community structure was mainly influenced by dissolved oxygen and TN. This study demonstrated the utilization of environmental DNA technology in assessing the ecological health of rivers and lakes, specifically highlighting its effectiveness in exposing the ecological condition of a representative Dianchi estuary.
A Landslide Displacement Prediction Model Based on the ICEEMDAN Method and the TCN–BiLSTM Combined Neural Network
Authors: Lin Qinyue , Yang Zeping , Huang Jie , Deng Ju , Chen Li , Zhang Yiru
Published: December 2023

Influenced by autochthonous geological conditions and external environmental changes, the evolution of landslides is mostly nonlinear. This article proposes a combined neural network prediction model that combines a temporal convolutional neural network (TCN) and a bidirectional long short-term memory neural network (BiLSTM) to address the shortcomings of traditional recurrent neural networks in predicting displacement-fluctuation-type landslides. Based on the idea of time series decomposition, the improved complete ensemble empirical mode decomposition with an adaptive noise method (ICEEMDAN) was used to decompose displacement time series data into trend and fluctuation terms. Trend displacement is mainly influenced by the internal geological conditions of a landslide, and polynomial fitting is used to determine the future trend displacement; The displacement of the fluctuation term is mainly influenced by the external environment of landslides. This article selects three types of landslide-influencing factors: rainfall, groundwater level elevation, and the historical displacement of landslides. It uses a combination of gray correlation (GRG) and mutual information (MIC) correlation modules for feature screening. Then, TCN is used to extract landslide characteristic factors, and BiLSTM captures the relationship between features and displacement to achieve the prediction of wave term displacement. Finally, the trend term and fluctuation term displacement prediction values are reconstructed to obtain the total displacement prediction value. The results indicate that the ICEEMDAN–TCN–BiLSTM model proposed in this article can accurately predict landslide displacement and has high engineering application value, which is helpful for planning and constructing landslide disaster prevention projects.
Attitude to the disease and quality of life in elderly patients with mild vascular dementia after the novel coronavirus infection
Authors:   FSBI V.M. Bekhterev National Research Medical Center for Psychiatry and Neurology, Saint-Petersburg, Zalutskaya N.M. , Khyanikyaynen I.I. ,   FSBEI HE Petrozavodsk State University, Petrozavodsk; Northern Institute (Branch) of the All-Russian State University of Justice (RPA of the Ministry of Justice of Russia in Petrozavodsk), Dmitryakova A.A. ,   FSBEI HE Petrozavodsk State University, Petrozavodsk
Published: December 2023

In order to study the types of attitude towards the disease and quality of life (QoL) in elderly patients with mild vascular dementia (MVD) living in the conditions of the psychoneurological institution Social Service House “Severnoye Izmailovo” in Moscow, there were 2 study groups: the patients with the clinical debut of the novel coronavirus infection (NCVI) of 6 months +/– 1 month with the recovery outcome (n=65; 33 men, 32 women) and those who did not have COVID-19 (hospital control group; n=67; 34 men, 33 women). The mean age of the studied patients was 73.05±3.48 years. The age and sex composition of the two groups was homogeneous (p>0.05). Emotional disorders were investigated using the Cornell Scale for Depression in Dementia (CSDD); cognitive disorders – by means of the Montreal Cognitive Assessment (MoCA); QoL – by the Quality of Life in Alzheimer's Disease scale (QoL-AD): QoL self-assessment (QoL-AD-SR (self-rating)) and proxy QoL rating (QoL-AD-PR (proxy rating)); the type of attitude towards the disease – by the TATD scale (Wasserman L.I. et al., 2005). It was found that COVID-19 aggravates cognitive deficits in patients with MVD (according to MoCA 20.80±0.59 /21.40±0.78 points; p<0.05) in the absence of depression (according to CSDD 1.52±0.50 / 1.52±0.84 points in the group of the patients after NCVI / hospital control group, respectively; p>0.05). In the patients after COVID-19, a correlation was found between the proxy QoL rating and the severity of cognitive dysfunction according to the MoCA (R= – 0.28), while in the hospital control group – between the proxy QoL rating and the severity of depressive manifestations (R= – 0.33). The first group of the patients was characterized by a mixed type of attitude to the disease and intrapsychic maladaptation (the neurasthenic type ranked first at 16.03±8.29 / 9.34±5.03 points), while the second group had a diffuse type of attitude to the disease and interpsychic maladaptation (the sensitive type ranked first at 10.31±5.71 / 14.90±7.62 points by the TATD scale among the elderly patients with MVD who have / have not undergone NCVI; p<0.05). The revealed patterns can contribute to the optimization of personalized models of medical and psychological rehabilitation of elderly patients with MVD living in closed-type care facilities.
Botulinum toxin preparations in complex therapy of infantile cerebral palsy (literature review)
Authors:   FSBEI HE Kabardino-Balkarian State University named after H.M. Berbekov, Magomadova E. R. , Magomadova S. R. ,   FSBEI HE Kabardino-Balkarian State University named after H.M. Berbekov, Azimova Kh. S. ,   FSBEI HE Kabardino-Balkarian State University named after H.M. Berbekov, Tlapshokova L. B. ,   FSBEI HE Kabardino-Balkarian State University named after H.M. Berbekov
Published: December 2023

The relevance of the topic is confirmed by statistical data related to primary childhood disabilities, according to which a number of congenital developmental anomalies and disorders of the nervous system are especially common. Cerebral palsy (CP) occupies a leading position in this regard. It is obvious that complex therapy for patients with cerebral palsy is effective, but it is not of economic benefit to the state, which to a certain extent provides support in the rehabilitation of this category of patients. In this connection, budgetary allocations and contributions from insurance companies both in the Russian Federation and other countries are distributed in a rational manner. Botulinum toxin preparations, used in standard clinical practice to combat focal spasticity syndrome in patients with cerebral palsy, have proved to be a feasible and economically beneficial medical technology. A similar therapy strategy has demonstrated a positive clinical effect. It is also the least expensive technology in the medical armamentarium used for the treatment and rehabilitation of patients with infantile cerebral palsy.
Neuropsychological signs of the neurodegenerative process in Alzheimer’s disease at the stage of mild cognitive impairment
Authors:   Nebbiolo Clinical Research Center, Tomsk, Russia, Zhukova N. G. ,   Federal State Budgetary Educational Institution of Higher Education Siberian State Medical University, Tomsk, Russia, Kolupaeva E. S. ,   Nebbiolo Clinical Research Center, Tomsk, Russia, Zhukova I. A. ,   Nebbiolo Clinical Research Center, Tomsk, Russia; Federal State Budgetary Educational Institution of Higher Education Siberian State Medical University, Tomsk, Russia, Izhboldina O. P. ,   Nebbiolo Clinical Research Center, Tomsk, Russia; Federal State Budgetary Educational Institution of Higher Education Siberian State Medical University, Tomsk, Russia, Zarya K. V. ,   Federal State Budgetary Educational Institution of Higher Education Siberian State Medical University, Tomsk, Russia
Published: December 2023

Currently, a huge number of works by domestic and foreign authors are devoted to the study of the neuropsychological heterogeneity of Alzheimer’s disease (AD) at the stage of mild cognitive impairment (MCI). The purpose of our study was to study the neuropsychological characteristics of AD at the stage of MCI depending on the timing of manifestation. The study involved 173 patients with asthma at the stage of MCI, of which 65 patients had early onset and 108 patients had late onset. All study participants underwent the Montreal Cognitive Assessment (MoCA), the Free Recall Test with selective cues and immediate recall (FCSRT-IR), the route-following test (drawing paths): part A and B; categorical and phonemic verbal fluency, digit recall (DST). The average age of patients with early onset of asthma was 65.1±0.3 years, with late onset — 78.6±0.5 years. According to the results of the study, it was found that patients with a late form of asthma coped with MoCA worse than a patient with an early form (p=0.043). Patients with late onset AD produced fewer words independently in the FCSRT-IR test compared to patients with early onset (p<0.001). Analysis of DST test performance in forward (p=0.41) and reverse order (p=0.197) did not show significant differences. We found that patients with early AD made more errors (p=0.000) and took longer to complete the route-following test, both parts A and B. There was no significant difference when assessing categorical verbal fluency (p=0.67). At the same time, patients with early onset AD named fewer words when assessing phonemic verbal fluency (p=0.000). The results of our study indicate the need for comprehensive, extensive neuropsychological testing in patients with suspected AD.
Temperature-Dependent Mn Substitution Effect on LiNiO2
Authors: Jeon Seungjae , Hussain Sk. Khaja , Bang Jin Ho
Published: December 2023

Despite the important role of manganese (Mn) in cobalt-free, Ni-rich cathode materials, existing reports on the effects of Mn as a substitute for cobalt are not consistent. In this work, we analyzed the performance of cathodes comprised of Li(Ni1–xMnx)O2 (LNMO). Both beneficial and detrimental results occurred as a result of the Mn substitution. We found that a complex interplay of effects (Li/Ni mixing driven by magnetic frustration, grain growth suppression, and retarded lithium insertion/extraction kinetics) influenced the performance and was intimately related to calcination temperature. This indicates the importance of establishing an optimal reaction temperature for the development of high-performance LNMO.
Efektivitas Penambahan Limbah Serat Aren Terhadap Kuat Lentur Dan Kuat Tekan Beton Fiber
Authors: Syaifuddin Dedi Ahmad , Saputro Yayan Adi , Rochmanto Decky
Published: December 2023

Pada penelitian ini, penulis menganalisa tentang pemanfaatan limbah serat aren sebagai bahan tambah beton serat dengan prosentase serat dan variasi panjang serat yang diuji dengan pengujian kuat tekan dan kuat lentur. Perbandingan prosentase serat yang digunakan adalah 2,5%, 2,7% dan 3% dengan variasi panjang serat yaitu 2cm dan 4 cm. Adapun hasil kuat tekan beton serat pada umur 28 hari, variasi panjang serat 2 cm dengan prosentase serat 2,5%, 2,7% dan 3% secara berturut-turut adalah 19,35 MPa, 21,5 MPa dan 21,43 MPa. Hasil kuat tekan beton fiber pada umur 28 hari, variasi Panjang serat 4 cm dengan prosentase serat 2,5%, 2,7% dan 3% secara berturut-turut adalah 21,33 MPa, 17,02 MPa dan 18,38 MPa. Berdasarkan hasil penelitian, di peroleh panjang serat efektif yang baik untuk digunakan sebagai bahan tambah beton serat yaitu serat dengan panjang 2cm. Adapun hasil kuat lentur beton serat variasi panjang 2cm dengan prosentase serat 2,5%, 2,7% dan 3% secara berturut-turut adalah 4,78 MPa, 5 MPa dan 5,13 MPa. Sehingga, berdasarkan hasil penelitian dapat disimpulkan bahwa campuran pada beton serat aren yang baik digunakan sebagai bahan tambah adalah beton serat dengan kadar serat 2,7% dan 3% dengan variasi Panjang 2cm.
ANALISIS RISIKO KESELAMATAN DAN KESEHATAN KERJA DENGAN HIRADC (STUDI KASUS : PEMBANGUNAN/REHABILITASI GEDUNG KEJAKSAAN TINGGI PROVINSI KALIMANTAN TENGAH)
Authors: Priambudi Januar Amin , Puspasari Veronika Happy , Nuswantoro Waluyo , Purwantoro Almuntofa
Published: December 2023

Risiko adalah kombinasi dari kemungkinan suatu kejadian berbahaya atau paparan dengan keparahan dari cidera atau gangguan Kesehatan yang disebabkan oleh kejadian atau paparan tersebut. Setiap aktivitas mengandung risiko untuk berhasil atau gagal. Tujuan penelitian ini adalah mengidentifikasi konstruksi tersebut dan mengetahui penilaian untuk setiap item pekerjaan. Hasil proses identifikasi bahaya yang dapat terjadi diantaranya adalah dehidrasi/kepanasan; sakit pinggang; terhirup debu/semen; kesalahan dalam mengangkat, menggeser, dan memindahkan; terhirup bau cat dan thinner; terkena benda tajam. Dengan mengkombinasi antara peluang dan konsekuensi diperoleh item pekerjaan yang memiliki risiko bahaya yang cukup banyak yaitu pekerjaan mekanikal elektrikal plumbing dengan jumlah risiko sebanyak 24 risiko, jumlah risiko tertinggi kedua adalah pekerjaan struktur bawah dan pekerjaan arsitektur dengan masing masing 14 risiko, dan tingkat risiko terendah yaitu pada pekerjaan persiapan dengan 3 risiko.
SISTEM INFORMASI PEMBAYARAN SYAHRIAH PONDOK PESANTREN DAARUL QUR’AN AMMR TLOGOSARI KULON SEMARANG BERBASIS WEB DAN NOTIFIKASI EMAIL
Authors: Purwanto Agus , Lutfi Septia , Imam Shofwan Ahmad
Published: December 2023

Sistem informasi pembayaran syahriah yang berjalan di Pondok Pesantren Daarul Qur'an Ibnu Ammr masih menggunakan sistem manual atau masih menggunakan sistem konvensional yang berfokus pada pendataan pembayaran syahriah. Banyak data akan menumpuk terus menerus yang sulit untuk disimpan. Saat di penyimpanan juga rawan terjadi kerusakan dan kehilangan data. Oleh karena itu, diperlukan proses transfer dan pengolahan data pembayaran syahriah secara manual menjadi pengelolaan data berbasis komputer. Pada sistem ini dapat membantu orang tua dalam melakukan transaksi pembayaran syariah. Dengan kemajuan teknologi saat ini membutuhkan sistem terbaru dalam dunia transaksi pembayaran syahriah yang sangat cepat yaitu sistem komputerisasi atau sistem yang dirancang untuk dapat mengelola proses pembayaran syahriah untuk meningkatkan informasi terkait uraian tersebut. dan Notifikasi Email yang dapat meningkatkan kinerja secara lebih efektif dan efisien.
A research on network intrusion detection systems using machine learning techniques
Authors:   MIREA – Russian Technological University, Trufanov V.N. , Ogarok A.L. , Nesterov S.G. ,   Starovoytov Center of Information Technologies and Systems for Executive Power Authorities
Published: December 2023

The article gives a general idea of intrusion detection systems (IDS) and machine learning, presents a classification of machine learning methods. The most commonly used data sets for training IDS are considered. The main performance indicators used to assess the IDS are described. A review of modern research on the development of intrusion detection methods using machine learning is made, the strengths and weaknesses of each solution are described. The data sets used in them, the obtained estimates of the effectiveness of the proposed intrusion detection methods, are analyzed. Based on the results of the analysis, development trends, unresolved problems and promising areas of research were identified.
On the application of heuristic algorithms for solving the pseudogeometric version of the traveling salesman problem for the design of communication networks
Authors:   Starovoytov Center of Information Technologies and Systems for Executive Power Authorities, Melnikov F. , Terentyeva Yu. Yu. , Chaikovskii D. A. ,   Shenzhen MSU-BIT University
Published: December 2023

The Mathematical models and algorithms developed to solve the traveling salesman problem are developed specifically for constructing optimal driving routes and choosing the optimal trajectory. At the same time, such models and algorithms are also used to solve several interconnected groups of applied problems; for example, it is the study of DNA chains, the calculation of the “similarity” of long strings, the construction of algorithms for checking special grammatical structures, etc. The resulting variants of the traveling salesman problem are close to the pseudogeometric version. We are most interested in issues related to communication networks (first of all, large ones). There are at least two different subject areas related to the application of the pseudogeometric version of the traveling salesman problem and heuristic algorithms for its solution. First, it is the location of the source points when generating the source data. Secondly, if we somehow organize the sequence of points well in advance, then the heuristic algorithms we use will work faster; at the same time, we can assume that such a “good location” is a pseudo-optimal solution to the traveling salesman problem. In the article, we also briefly describe our approach to classifying input data generation options designed primarily to test the operation and compare heuristic algorithms. In addition, an auxiliary algorithm for pseudo-optimal placement of points is described; it is desirable to use this algorithm specifically for a set of points generated as a variant of the pseudo-geometric version of the traveling salesman problem. The article also presents some results of computational experiments that allow comparing different algorithms for solving pseudogeometric variants of the problem.
The Impact of Competitiveness, Information Technology, Risk Perception, and Financial Literacy on The Intention to Invest in Cryptocurrency
Authors: Miko Satriya , Tri Atmaja Aditya Wahyu , Mawardah Risna , Zulfa Syifa Dwi , Siboro Fernando , Marjuki Arif
Published: December 2023

This study aims to analyze the impact of competence, information technology, risk perception, and financial literacy on interest in investing in cryptocurrency. The method used is quantitative, with data collected from 98 respondents through simple random sampling. The focus of this research is to reveal the relationship between factors that influence the interest of individuals who invest in cryptocurrencies. The results show that competency, information technology, risk perception, and financial literacy simultaneously or partially have a positive and significant effect on interest in cryptocurrency investment. These results suggest that the higher the competence of individuals in the field of financial knowledge and understanding of information technology, the greater their interest in investing in cryptocurrencies. In addition, the perception of low risk and high levels of financial literacy also contribute to increased interest in investing in cryptocurrencies. This research makes an important contribution in understanding the factors that influence the interest of individuals interested in cryptocurrencies. In the era of the rapidly developing digital economy, a deeper understanding of the impact of competency, information technology, risk perception and financial literacy has the potential to assist decision makers in developing more effective investment strategies and reducing risks. These findings also provide deeper insight into the dynamics of the cryptocurrency market and the consequences of growing investment in this sector. This research has actual relevance in the context of cryptocurrency investment, where the influence of factors such as competence, information technology, risk perception, and financial literacy on interest in investing is still not fully revealed. Through the help of the significant relationship between these factors and investment intentions, this research provides valuable insights for practitioners, academics, and decision makers to better understand and manage cryptocurrency investments more effectively. Thus, this research also makes an important contribution in developing knowledge and managing cryptocurrency investments in this increasingly digital era.
Analysis of the Acceptance Level of E-Wallet as a Non-Cash Payment Method among Indonesian Students
Authors: Galang Juan , Ramdhan Haikal
Published: December 2023

This research delves into the adoption of e-wallets, specifically Shopee Pay, among Indonesian students in the digital economic era. The study aims to analyze students' acceptance levels of e-wallets as a non-cash payment method, motivated by the rapid advancement in information and communication technology and the emerging need for efficient and secure financial transactions. Employing a survey-based approach, the research focuses on students' perceptions regarding the ease of use, usefulness, and perceived risks of e-wallets.The findings reveal a predominantly positive perception among students towards e-wallets. A significant majority of respondents acknowledge the ease and benefits of non-cash transactions, indicating effective implementation of this technology. Moreover, the low risk perception underscores a sense of security among students in using e-wallets. Conclusively, e-wallets, particularly Shopee Pay, demonstrate considerable potential as a favored non-cash payment method among Indonesian students. This widespread acceptance can catalyze the growth of the digital payment ecosystem, propelling Indonesia's digital financial transformation. The study offers valuable insights into consumer preferences and behaviors concerning e-wallets, aiding fintech companies and financial institutions in enhancing digital payment services. The adoption of e-wallets by students not only boosts transaction efficiency but also contributes to the expansion of Indonesia's digital economy. These findings provide a foundation for further research into the acceptance of non-cash payment technologies in Indonesian society.
Perancangan Media Pembelajaran Bidang Transportasi dan Logistik Berbasis Website
Authors: Angga Erlangga Fajar Raihansyah , Aldrian Alen , Adhi Nugroho Taufiq , Maulana Ibrahim Shiddiq
Published: December 2023

Dislog adalah media pembelajaran berbasis website yang berfokus untuk menmabah wawasan, ilmu pengetahuan secara menyeluruh di bidang transportasi, logistik dan kepelabuhanan. Perancangan media pelajaran berbasis website ini bertujuan agar mahamahasiswa dapat mengakses pembelajaran mengenai transportasi logistik dengan mudah, kapan saja dan dimana saja. Media ini juga dapat sebagai perantara penyampaian materi antara mahamahasiswa dan pengajar. Perancangan media pembelajaran berbasis website ini dikembangkan dengan metode penelitian dan pengembangan (R&D). Penelitian ini menggunakan tahapan penelitian dari Borg dan Gall dengan 4 tahapan yaitu; penelitian awal; pengembangan; pengujian lapangan; penyebaran produk. Media pembelajaran berbasis website dislog ini dirancang untuk mahamahasiswa Manajemen Pelabuhan dan Logistik Maritim, Universitas Negeri Jakarta. Adanya media pembelajaran berbasis website tersebut tentunya membuat masyarakat Indonesia menjadi lebih mudah dalam mencari informasi, ilmu pengetahuan atau wawasan yang dibutuhkannya. Salah satu dari informasi, ilmu pengetahuan dan wawasan tersebut adalah ilmu mengenai bidang transportasi, logistik dan kepelabuhanan, yang dimana pada penelitian ini akan berfokus pada suatu produk media pembelajaran berbasis website yaitu Dislog (Diskusi Logistik).
The level of student independence in using YouTube to improve computer assembly skills at Vocational High School
Authors: Taku Neno Khatrin Juliani
Published: December 2023

This research aims to determine the level of achievement in aspects of implementation, understanding of learning, and student learning success in using YouTube independently to improve computer assembly skills in class XI students in the Computer Network and Telecommunications Engineering skills program at SMKN 6 Kupang. This research is a quantitative descriptive type. The research population was 60 class XI students. Data was taken using a closed questionnaire. The instrument was validated with Expert Judgment, while Crobanch Alpha was used to find reliability values. The data obtained was analyzed using descriptive statistics in the form of mean values. The research results show: (1) The learning process using YouTube as a learning resource can increase learning independence with an achievement level of 93.49%. (2) Using YouTube can increase understanding of computer assembly procedures with an achievement level of 96.38%. (3) Utilizing YouTube can improve computer assembly skills with an achievement level of 97.40%.
Oportunidades para el financiamiento climático en Bolivia
Authors: Funes Dennis , Arroyo Jimenez Marcelo , Jimenez Taquiguchi Jose
Published: December 2023

Bolivia, un país altamente vulnerable al cambio climático, tiene oportunidades prometedoras para consolidar una estrategia de financiamiento climático. Con el enfoque internacional para abordar los desafíos climáticos, Bolivia puede acceder a fondos para fortalecer su resiliencia y reducir emisiones. Fuentes de fondos importantes incluyen el “Fondo verde para el clima”, el “Fondo para el medio ambiente mundial” y asociaciones bilaterales. Mediante inversiones en proyectos sostenibles como energías renovables, reforestación y adaptación climática, Bolivia puede mitigar riesgos ambientales, fomentar el crecimiento económico y mejorar comunidades. La utilización efectiva del financiamiento, una gobernanza transparente y sólidas alianzas pueden abrir un futuro sostenible para Bolivia, contribuyendo a la lucha global contra el cambio climático.
Studi Batuan Asal (Provenance) Batupasir Formasi Simpangaur Daerah Way Krui, Lampung
Authors: Alviyanda Alviyanda , Sipayung Candra Sadaperarih
Published: December 2023

Bengkulu basin is the one of fore arc basin which formed in Sumatra island. The basin formation is inseparable from tectonic activity of the Sumatra Island from the Pre-Tertiary era to present day. The relationship between tectonic activities and the basin filling can be identified by conducting a provenance study on the sedimentary rocks. The Simpangaur Formation is a Tertiary sedimentary rock that has filled the Bengkulu Basin in the southern Sumatra. The aim of this research is determining the provenance of Simpangaur Formation existed in Way Krui area, Lampung, and its tectonic environment. The observations of thin section were carried out on eleven sedimentary rock samples obtained from field. The provenance of these rocks is analyzed by quantifying the mineral composition microscopically. The result analysis show that the grains originated from a magmatic arc environment, specifically the transitional arc and undissected arc. Based on the presence of polycrystalline quartz in eleven rock samples, it is interpreted as originating from the Orogen Arc. In addition, it is also interpreted that the provenance for sandstone samples of the Simpangaur Formation are plutonic and metamorphic rocks in a semi-arid climate, based on ancient climate.
Karakteristik Aspal Porus dengan Campuran Serat Bemban (Donax Canniformis) Terhadap Porositas, Void In Mixture, dan Marshall Quotient
Authors: Saputra Yoga , Zahara Asri Wiana Lika , Lazuardi Muhammad Alif , Amada Nur Maeysya Saida , Haryanti Ninis Hadi
Published: December 2023

The need for additional materials to improve the quality of porous asphalt that is environmentally friendly, the  natural fiber is the right component. Bemban is a typical South Kalimantan plant that has good properties as a mixture material. This research was conducted to identify the characteristics of bemban fiber as a porous asphalt mixture material and identify the characteristics of porous asphalt with bemban fiber mixture. The characteristics measurement of bemban fiber includes moisture content, cellulose content, and lignin content, making asphalt specimens with bemban fiber mixture using variations of 1, 2, and 3 (%W/W), and porous asphalt characterization including porosity, Marshall Quotient (MQ), and Void in the Mixtures (VIM) with the Australian Asphalt Pavement Association (AAPA) 2004 reference standard. The results show the characteristics of bemban fiber with NaOH treatment 30 minutes 28oC obtained moisture content 2.36, cellulose content 22.52, and lignin content 1.33 (%W/W) which was used as a porous asphalt mixture. Characteristics of porous asphalt with variations of bemban fiber obtained optimum porosity, MQ, VIM values at the addition of bemban fiber 1 (%W/W) and has met the specification parameters.
Kinerja Ratio Silika-Cat Dengan Metode Dipcoating Pada Permukaan Logam Untuk Penghambat Laju Korosi
Authors: Simatupang Lisnawaty , Siburian Rikson , Ginting Elfrida , Sihombing Junifa Layla , Herlinawati Herlinawati , Munte Alex Suhendra , Simatupang Kristian Adinata Pratama , Siagian Dea Gracella
Published: December 2023

Silica oxide (SiO2) is a chemical compound that can be obtained from the extraction of volcanic ash from Mount Sinabung. Silicon dioxide has the properties of high porosity, high mechanical strength, high thermal stability, large pore surface area, stable surface in acidic media so that it can be applied in the chemical coating field.This research aims to measurement of performance natural silica from volcanic ash of mount Sinabung Indonesia as additives to the paint to inhibit corrosion rate in metal surface. The addition of silica additives to the paint was carried out by dispersing (0; 0.5; 0.75; and 1) g with 10 mL of paint with each composition carried out for 60 minutes. Iron plate in sandpaper with 1500 grid and polished with bludru cloth using autosol metal polish, then coated with paint and a combination of silica-paint through the dipcoating method. The corrosion test was carried out on a corrosive solution of HCl 15% (v/v) and NaCl 3.5% (w/v). The corrosion rate using HCl 15% (v/v) showed C (0,286) mpy, SC1 (0,123) mpy, SC2 (0,149) mpy, SC3 (0,120) mpy. While at 3.5% (w/v) NaCl, namely C (0,282) mpy, SC1 (0,120) mpy, SC2 (0,142) mpy, SC3 (0,098) mpy. Inhibitor efficiency for various variations of silica composition in corrosive HCl 15%(v/v) solution, e.g., SC1 (56,9%), SC2 (47,9%), and SC3 (58,04%). The inhibitor efficiency at various compositions of silica in NaCl 3.5% (w/v) are SC1 (57,44%), SC2 (49%) dan SC3 (65,24%).
Estimation of methane emission from Piyungan landfill using IPCC method
Authors: Pratiwi Yuli , Sukmawati Paramita Dwi , Bunga Fisher Inco Rande
Published: December 2023

One of the greenhouse gases that causes climate change is the emission of methane (CH4) produced by landfills. The methane comes from the anaerobic decomposition of organic matter in the waste at the landfill. The purpose of this study is to estimate methane emissions at the Piyungan landfill, Bantul, Yogyakarta, from 2021 to 2025 using IPCC method. No similar work has been conducted so far, especially in the Piyungan landfill. The result shows that methane emissions produced at the Piyungan landfill in 2021 is 544.05 tons with a total waste generation of 549.49 tons/year and is dominated by 88% organic waste. Meanwhile from 20,786 tons of waste generated in 2025, the methane emissions are estimated to be 573.85 tons. To minimize the methane emission from Piyungan landfill, it is recommended mitigation and adaptation efforts, i.e., the 3R method (reduce, reuse, recycle), the composting of organic waste, the addition of gas ventilation pipes. The methane gas from the Piyungan landfill should be explored as alternative energy fuel in future work.
Pengaruh Suhu dan Waktu Ekstraksi dalam Proses Pembuatan Pektin dari Kulit Buah Sukun dengan Pelarut Asam Sitrat
Authors: Nurlaila Rizka , Muarif Agam , Meriatna Meriatna , Masrullita Masrullita , Ishak Ishak
Published: December 2023

The breadfruit rinds has never been used, even though breadfruit rinds is known contain pectin which has a high economic value. Pectin is a biopolymer compound that functions as a water binder or liquid thickener obtained through the extraction process of fruits waste. The purpose of this research is to utilize the waste of breadfruit rinds into pectin to increase the economic value. This research used reflux extraction method with 7% citric acid as solvent, extraction time used was 170, 175,180, 185, and 190 minutes at 85, 90, and 95°C. The highest research results were obtained at a temperature of 95°C with a long extraction time of 195 minutes, namely yield of 40,762%, water content of 1,92%, methoxyl content of 8.06%, galacturonic content of 81%.
Rancang Bangun Kursi Roda Bermotor Elektrik Dengan Sistem Pengendalian Gestur Untuk Penyandang Tetraplegic
Authors: Darmawan Marten , Prasetyo Joseph Fernando Budi , Soewono Arka Dwinanda
Published: December 2023

Improving medical services is continuously prioritized for the sake of achieving the welfare of all people in the world, and by providing good services in the medical field, people's needs will be increasingly fulfilled. Limitations of movement in someone with a disability, such as persons with disabilities tetraplegic in terms of mobility, are often obstacles. Therefore, a media-assisting movement is needed. This study designed an electric wheelchair that can help users with disabilities tetraplegic in moving without the need for too much force as in a standard wheelchair. This electric wheelchair uses automation by utilizing Accelerometer, which can detect vectors or so-called gyroscopes and connect with Arduino as the processor is continued to the DC motor as the driving force. Based on the test data, it was found that the design of this wheelchair moves as desired. This can be seen from the change in speed of the driving motor to changes in the tilt of the accelerometer mounted on the head. In the forward motion test, the maximum motor speed is 35 RPM when the accelerometer angle is at a slope of 64.7o positive axes. Meanwhile, the backward movement of the wheelchair occurs when the accelerometer is at a slope of -21.1o and produces a speed of 11.2 RPM on wheels. The rider's maximum load is designed to be 50 Kg.
Condition of Coral Reef in Kelagian Besar Island
Authors: Novriadi Novriadi , Anam Khairul , Aziz Abdul
Published: December 2023

The coral reef ecosystem plays many important roles for society. One of the its role is as a tourist attraction. Kelagian Island lies near Pahawang island which is the major attraction of marine tourism in Lampung. This position makes Kelagian Island the most potential alternative island after Pahawang Island. However, sufficient information about the coral condition and profile in Kelagian Island has yet to support this potential. For that reason, a study about coral reef conditions on Kelagian island must be conducted to provide information and support the possibility of tourism development on Kelagian island. This study was conducted in August 2022 using Point Intercept Transect (PIT) in three different sites on Kelagian Island. Coral reef condition in 3 meter depth were generally in good condition, meanwhile in 7 meters depth coral reef condition were in medium state. There were 22 genera found in Kelagian island. Acropora and Porites were found dominating three meter depth. On the other hand in seven meter of depth, Goniopora and Favia were abundantly found. Diversity index, Evenness, and Dominance Index in Kelagian Island are 2,29-2,49 (medium), 1-0,83 (stable), and 0,12-0,15 (low) respectively.
Organización, conflicto y transformaciones en el sindicalismo docente
Authors:   , Labourdette Lorenzo Javier
Published: December 2023

El movimiento sindical docente se nutre de una rica historia cuya trayectoria se extendió desde fines del siglo XIX hasta la actualidad. En esta investigación se hace foco en el proceso de organización, conflicto y transformación sindical experimentado por los trabajadores de la educación durante los años setenta y ochenta. La propuesta se organiza en tres escalas de análisis: el caso de la Confederación de Trabajadores de la Educación de la República Argentina (CTERA) a nivel nacional, el de los sindicatos de base en la provincia de Buenos Aires y, entre ellos, el caso particular y regional de la Agremiación Docente Unificadora de La Plata-Berisso-Ensenada (ADU LP-B-E). Como hipótesis de trabajo se plantea que el proceso de politización y radicalización experimentado por agrupaciones políticas y sindicales desde los años sesenta se tradujo en el terreno sindical docente, en las escalas y espacios gremiales propuestos, en un singular conjunto de transformaciones que incluyó nuevas formas organizativas, de conciencia y de proyección política. Asimismo, se conjetura que en la dinámica de esta experiencia, los procesos represivos, dados en un contexto general de enfrentamiento social de clases, generaron como efecto directo nuevas transformaciones que, durante los años ochenta, se vieron reflejadas en renovadas formas organizativas e ideológicas, así como en nuevas proyecciones políticas. En términos teóricos, la indagación contempla el conflicto y las relaciones de clases como epicentro de la explicación y pondera referencias teóricas específicas orientadas a la explicación de problemas históricos puntuales. Metodológicamente, combina diversas estrategias. El análisis en perspectiva de escalas favoreció la observación de lo general pero también de lo particular y local en su necesaria y dialéctica interrelación histórica. Por su parte, el estudio se estructuró sobre la base de una estrategia que articuló recursos de investigaciones cualitativas y cuantitativas, preferencia que potenció la flexibilidad analítica y un control más preciso de la observación empírica. Para ello la construcción de datos se realizó a partir de recursos complementarios: entrevistas semiestructuradas con final abierto, registros hemerográficos y análisis de diversos tipos de documentos.