bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of Pore Water Content on Stress Sensitivity of Tight Sandstone Oil Reservoirs: A Study of the Mahu Block (Xinjiang Province, China)
Authors: Li Xiaoshan , Gu Kaifang , Xu Wenxiu , Song Junqiang , Pan Hong , Dong Yan , Yang Xu , You Haoyu , Wang Li , Fu Zheng , Liu Lingqi , Wang Ke
Published: November 2023

Traditional stress sensitivity experiments are typically conducted under dry conditions, without considering the reservoir’s water content. In reality, the presence of water within pores significantly influences the extent of stress sensitivity damage in tight sandstone oil formations, subsequently affecting the determination of stress sensitivity coefficients during experimentation. By investigating sandstone samples from wells in the Mahu Block of China’s Xinjiang province, we observed that increasing water saturation reduces the stress sensitivity of tight sandstone. By conducting stress sensitivity experiments under varying water content conditions, we found that the stress sensitivity coefficient is not a constant value but decreases as water saturation increases. Based on experimental comparisons, an optimized power-law model for stress-sensitive damage assessment was refined. By conducting stress-sensitive damage assessment experiments under different water content conditions and integrating the concept of comprehensive compression coefficient, an improved stress-sensitive power-law model was established allowing for the influence of water content. The accuracy of this improved model was increased by 46.98% compared to the original power-law model through experimental validation. The research outcomes can enhance the accuracy of permeability and productivity evaluation, providing valuable guidance for unconventional oil and gas development.
A Generic Self-Supervised Learning (SSL) Framework for Representation Learning from Spectral–Spatial Features of Unlabeled Remote Sensing Imagery
Authors: Zhang Xin , Han Liangxiu
Published: November 2023

Remote sensing data has been widely used for various Earth Observation (EO) missions such as land use and cover classification, weather forecasting, agricultural management, and environmental monitoring. Most existing remote-sensing-data-based models are based on supervised learning that requires large and representative human-labeled data for model training, which is costly and time-consuming. The recent introduction of self-supervised learning (SSL) enables models to learn a representation from orders of magnitude more unlabeled data. The success of SSL is heavily dependent on a pre-designed pretext task, which introduces an inductive bias into the model from a large amount of unlabeled data. Since remote sensing imagery has rich spectral information beyond the standard RGB color space, it may not be straightforward to extend to the multi/hyperspectral domain the pretext tasks established in computer vision based on RGB images. To address this challenge, this work proposed a generic self-supervised learning framework based on remote sensing data at both the object and pixel levels. The method contains two novel pretext tasks, one for object-based and one for pixel-based remote sensing data analysis methods. One pretext task is used to reconstruct the spectral profile from the masked data, which can be used to extract a representation of pixel information and improve the performance of downstream tasks associated with pixel-based analysis. The second pretext task is used to identify objects from multiple views of the same object in multispectral data, which can be used to extract a representation and improve the performance of downstream tasks associated with object-based analysis. The results of two typical downstream task evaluation exercises (a multilabel land cover classification task on Sentinel-2 multispectral datasets and a ground soil parameter retrieval task on hyperspectral datasets) demonstrate that the proposed SSL method learns a target representation that covers both spatial and spectral information from massive unlabeled data. A comparison with currently available SSL methods shows that the proposed method, which emphasizes both spectral and spatial features, outperforms existing SSL methods on multi- and hyperspectral remote sensing datasets. We believe that this approach has the potential to be effective in a wider range of remote sensing applications and we will explore its utility in more remote sensing applications in the future.
Methodology for Risk Assessment of SARS-CoV-2 Virus Transmission in Hospital Buildings
Authors: da Cunha Thaysa V. , Willcox Laryssa F. C. , da Costa Bruno B. F. , Najjar Mohammad , Soares Carlos A. P. , Haddad Assed N.
Published: November 2023

Considering the impact of COVID-19 on hospital facilities and the relevance of risk management and occupational health and safety within this context, this study introduces a method to assess the SARS-CoV-2 virus transmission risk in a toilet. The proposed method is based on a risk tripod involving environmental, human, and transmission factors. For this, risk assessment methodologies were applied, such as Failure Modes and Effects Analysis (FMEA), Ergonomic Work Analysis (EWA), which allowed the identification of risk indicators, and Fault Tree Analysis (FTA), which allowed the identification of transmission routes of COVID-19 in toilets. Subsequently, the Analytic Hierarchy Process (AHP) was used to find each transmission route weighting for calculating the Risk Score. The results indicated that the design of sanitary equipment, with an emphasis on washbasins and toilets, especially in health or large circulation establishments, is of paramount importance in the dissemination of pathogens. Safe habits and the use of protective gear must be continuously encouraged, but greater attention must be paid to technical and engineering issues. Furthermore, the developed method proved to be an applicable tool to identify the main sources of risk and prioritize the implementation of control measures.
On Underdispersed Count Kernels for Smoothing Probability Mass Functions
Authors: Kokonendji Célestin C. , Somé Sobom M. , Esstafa Youssef , Bourguignon Marcelo
Published: November 2023

Only a few count smoothers are available for the widespread use of discrete associated kernel estimators, and their constructions lack systematic approaches. This paper proposes the mean dispersion technique for building count kernels. It is only applicable to count distributions that exhibit the underdispersion property, which ensures the convergence of the corresponding estimators. In addition to the well-known binomial and recent CoM-Poisson kernels, we introduce two new ones such the double Poisson and gamma-count kernels. Despite the challenging problem of obtaining explicit expressions, these kernels effectively smooth densities. Their good performances are pointed out from both numerical and comparative analyses, particularly for small and moderate sample sizes. The optimal tuning parameter is here investigated by integrated squared errors. Also, the added advantage of faster computation times is really very interesting. Thus, the overall accuracy of two newly suggested kernels appears to be between the two old ones. Finally, an application including a tail probability estimation on a real count data and some concluding remarks are given.
Analysis of Key Injury-Causing Factors of Object Strike Incident in Construction Industry Based on Data Mining Method
Authors: Yang Wei , Lu Zheng
Published: November 2023

Incidents are caused by a variety of factors, and there are correlations between incident causative factors. How to effectively clarify the importance of incidental injury-causing factors and their correlations is the current technical challenge in the field of incident causation analysis. This paper takes the study of injury-causing factors and their relationships between object-striking incidents in the process of construction as an example, and it statistically analyzes the incident investigation reports of 126 cases of object-striking incidents in construction projects in China from 2016 to 2022; it screens out 52 categories of incident-causing factors. The Apriori algorithm and FP-growth algorithm are used to data mine the influencing factors obtained from the 126 object-striking incidents: 28 main incident causative items of object-striking incidents and the respective correlation degree between each factor are obtained. By analyzing the support degree of the main incident causation items, as well as comparing and analyzing the results of the incident causation support degree and association rules with Bayesian inference, 9 key injury-causing factors of object-striking incidents are identified. The research results put forward a new research idea for the analysis of the injury factors of object-striking incidents in construction, which can provide theoretical reference for improving the pertinence and effectiveness of incident prevention measures.
Quantifying the ‘Yellow Card Policy’ Effect: An Intervention Analysis of Chinese Tourist Migration to South Korea amidst the COVID-19 Pandemic
Authors: He Yugang , Bai Guihua
Published: November 2023

The focal point of this investigation is to unravel the intricate consequences of the ‘Yellow Card Policy’ enacted by South Korea on the inflow of Chinese tourists, set against the backdrop of the tumultuous global disruption instigated by the COVID-19 pandemic. Leveraging a dataset delineating monthly periods from January 2020 to May 2023 and invoking the intervention analysis method for empirical evaluation, we excavate a series of salient findings. We discern that South Korea’s “Yellow Card Policy” casts a significant negative shadow over the magnitude of Chinese tourist arrivals, with a particularly profound impact on the long-term outlook. Simultaneously, our investigation illuminates a discernible negative correlation between South Korea’s inflation rate and the influx of Chinese tourists, thereby underlining the critical influence of domestic economic health on international tourism trajectories. Conversely, we observe a distinct positive association between the China–South Korea exchange rate and the influx of Chinese tourists. This insinuates that an advantageous exchange rate can serve as a compelling economic catalyst, stimulating tourism demand by making the host country more financially appealing to potential tourists. In essence, this array of findings paints a multifaceted tableau of how policy maneuvers, economic landscapes, and global health upheavals converge to sculpt the contours of international tourism.
Thermal Characteristics and Temperature Distribution of Asphalt Mixtures Containing Residues from Municipal Solid Waste Incineration
Authors: Xu Ling , Alae Mohsen , Du Yinfei , Loprencipe Giuseppe , Peluso Paolo , Moretti Laura
Published: November 2023

As a sustainable substitute for non-renewable mineral resources and solid waste landfilling, municipal solid waste incineration residues (MSWIRs) are useful in road pavements. This study investigates the thermal characteristics and temperature distribution of flexible pavements containing MSWIRs with hollow microsphere structures. First, the volumetric properties of asphalt mixtures containing MSWIR fillers were measured. The effects of MSWIRs on the mixture’s physical characteristics were investigated in terms of thermal conductivity, specific heat capacity, and thermal diffusivity. A three-dimensional finite element model incorporating surface thermal conditions was established and validated to analyze the internal temperature distribution and heat transfer behavior within the asphalt. Finally, the high-temperature conditions of summer were simulated in an indoor irradiation test to evaluate the risk of heat islands in urban areas. The results showed that the mixture containing MSWIRs exhibited a higher specific heat capacity (from 0.8385 to 0.9554 J/(kg·K)) and lower thermal conductivity (from 1.4356 to 1.1362 W/(m·K)) than the reference mixture with limestone filler. Therefore, it contributed to a lower heat flux distribution within the pavement. However, the increase in asphalt surface temperature caused by MSWIRs may exacerbate the urban heat island effect in the summer, which should be considered before using road materials containing MSWIRs.
Bibliometric Analysis of the State of Research on Agroecology Adoption and Methods Used for Its Assessment
Authors: Nikiema Théodore , Ezin Eugène C. , Kpenavoun Chogou Sylvain
Published: November 2023

As a sustainable and holistic approach to agriculture, agroecology has received considerable attention in recent years because of its potential to address the environmental, economic, and social challenges of agricultural systems. In order to identify key trends, influential authors, impactful journals, and emerging research themes surrounding the agroecological adoption topic, we performed a bibliometric analysis based on metadata from documents dealing with the topic and methods employed for its assessment over the period of January 1990 to July 2023, extracted from the Web of Science database. Based on the metadata of more than 1280 articles, our analyses show that the “identification of agroecology adoption determinants” and the “development of knowledge for food sovereignty” are among the trendiest research topics, while farming systems management and biodiversity issues are basic themes. The issue of analyzing agricultural productivity is more often linked to the impact of climate change. Also, we find that machine learning methods are not yet widely used to model the process of farm agroecological adoption. The contribution of African countries to the topic remains marginal in terms of documents produced, despite the predominance of traditional agriculture on the continent.
Photovoltaic/Hydrokinetic/Hydrogen Energy System Sizing Considering Uncertainty: A Stochastic Approach Using Two-Point Estimate Method and Improved Gradient-Based Optimizer
Authors: Kamal Mustafa , Pecho Renzon Daniel Cosme , Fakhruldeen Hassan Falah , Sharif Hailer , Mrzljak Vedran , Nowdeh Saber Arabi , Poljak Igor
Published: November 2023

In this paper, stochastic sizing of a stand-alone Photovoltaic/Hydrokinetic/Hydrogen storage energy system is performed with aim of minimizing the cost of project life span (COPL) and satisfying the reliability index as probability of load shortage (POLS). The stochastic sizing is implemented using a novel framework considering two-point estimate method (2m+1 PEM) and improved gradient-based optimizer (IGBO). The 2m+1 PEM is used to evaluate the impact of uncertainties of energy resource generation and system demand on sizing problem. The 2m+1 PEM utilizes the approximate method to account for these uncertainties. In order to avoid premature convergence, the gradient-based optimizer (GBO), a meta-heuristic algorithm influenced by Newtonian concepts, is enhanced using a dynamic lens-imaging learning approach. The size of the system devices, which is determined utilizing the IGBO with the COPL minimization and optimally satisfying the POLS, is one of the optimization variables. The results of three hPV/HKT/FC, hPV/FC, and hHKT/FC configurations of the system are presented in two situations of deterministic and stochastic sizing without and with taking uncertainty into consideration. The findings showed that the hPV/HKT/FC configuration and the IGBO performed better than other configurations and techniques like conventional GBO, particle swarm optimization (PSO), and artificial electric field algorithm (AEFA) to achieve the lowest COPL and POLS (higher reliability) in various cases. Additionally, the COPL for the hPV/HKT/FC, hPV/FC, and hHKT/FC configurations increased by 7.63%, 7.57%, and 7.65%, respectively, while the POLS fell by 5.01%, 4.48%, and 4.59%, respectively, contrasted to the deterministic sizing, according to the results of stochastic sizing based on 2m+1 PEM. As a result, the findings indicate that in the deterministic sizing model, the quantity of output and energy storage is insufficient to meet demand under unknown circumstances. Applying stochastic sizing while taking into account the volatility of both supply and demand can, therefore, be an economically sound way to meet demand.
Optimal Allocation of Distribution Static Synchronous Compensators in Distribution Networks Considering Various Load Models Using the Black Widow Optimization Algorithm
Authors: Salimon Sunday Adeleke , Adebayo Isaiah Gbadegesin , Adepoju Gafari Abiola , Adewuyi Oludamilare Bode
Published: November 2023

Incorporating Distribution Static Synchronous Compensator (DSTATCOM) units into the radial distribution network (RDN) represents a practical approach to providing reactive compensation, minimizing power loss, and enhancing voltage profile and stability. This research introduces a unique optimization technique called the Black Widow Optimization (BWO) algorithm for strategically placing DSTATCOM units within the RDN. The primary objective is to minimize power loss while simultaneously evaluating various techno-economic parameters such as the voltage profile index (VPI), voltage stability index (VSI), and annual cost savings. The analysis of optimal DSTATCOM allocation, employing the proposed BWO algorithm, encompasses different load models, including constant impedance (CZ), constant current (CI), constant power (CP), and composite (ZIP) models. These analyses consider three distinct scenarios: single and multiple DSTATCOM integration. To gauge the effectiveness of the proposed BWO technique, it is applied to the IEEE 33-bus and 69-bus RDNs as test cases. Simulation results confirm the efficiency of the proposed approach across all four load models. Notably, in the case of the constant power model, the percentage reduction in power loss is substantial, with a reduction of 34.79% for the IEEE 33-bus RDN and 36.09% for the IEEE 69-bus RDN compared to their respective base cases.
Seasonal Single-Site Sampling Reveals Large Diversity of Marine Algal Toxins in Coastal Waters and Shellfish of New Caledonia (Southwestern Pacific)
Authors: Sibat Manoëlla , Mai Tepoerau , Tanniou Simon , Biegala Isabelle , Hess Philipp , Jauffrais Thierry
Published: November 2023

Algal toxins pose a serious threat to human and coastal ecosystem health, even if their potential impacts are poorly documented in New Caledonia (NC). In this survey, bivalves and seawater (concentrated through passive samplers) from bays surrounding Noumea, NC, collected during the warm and cold seasons were analyzed for algal toxins using a multi-toxin screening approach. Several groups of marine microalgal toxins were detected for the first time in NC. Okadaic acid (OA), azaspiracid-2 (AZA2), pectenotoxin-2 (PTX2), pinnatoxin-G (PnTX-G), and homo-yessotoxin (homo-YTX) were detected in seawater at higher levels during the summer. A more diversified toxin profile was found in shellfish with brevetoxin-3 (BTX3), gymnodimine-A (GYM-A), and 13-desmethyl spirolide-C (SPX1), being confirmed in addition to the five toxin groups also found in seawater. Diarrhetic and neurotoxic toxins did not exceed regulatory limits, but PnTX-G was present at up to the limit of the threshold recommended by the French Food Safety Authority (ANSES, 23 μg kg−1). In the present study, internationally regulated toxins of the AZA-, BTX-, and OA-groups by the Codex Alimentarius were detected in addition to five emerging toxin groups, indicating that algal toxins pose a potential risk for the consumers in NC or shellfish export.
Human Complement Inhibits Myophages against Pseudomonas aeruginosa
Authors: Egido Julia E. , Dekker Simon O. , Toner-Bartelds Catherine , Lood Cédric , Rooijakkers Suzan H. M. , Bardoel Bart W. , Haas Pieter-Jan
Published: November 2023

Therapeutic bacteriophages (phages) are primarily chosen based on their in vitro bacteriolytic activity. Although anti-phage antibodies are known to inhibit phage infection, the influence of other immune system components is less well known. An important anti-bacterial and anti-viral innate immune system that may interact with phages is the complement system, a cascade of proteases that recognizes and targets invading microorganisms. In this research, we aimed to study the effects of serum components such as complement on the infectivity of different phages targeting Pseudomonas aeruginosa. We used a fluorescence-based assay to monitor the killing of P. aeruginosa by phages of different morphotypes in the presence of human serum. Our results reveal that several myophages are inhibited by serum in a concentration-dependent way, while the activity of four podophages and one siphophage tested in this study is not affected by serum. By using specific nanobodies blocking different components of the complement cascade, we showed that activation of the classical complement pathway is a driver of phage inhibition. To determine the mechanism of inhibition, we produced bioorthogonally labeled fluorescent phages to study their binding by means of microscopy and flow cytometry. We show that phage adsorption is hampered in the presence of active complement. Our results indicate that interactions with complement may affect the in vivo activity of therapeutically administered phages. A better understanding of this phenomenon is essential to optimize the design and application of therapeutic phage cocktails.
Cytomegalovirus-Specific T Cells in Pediatric Liver Transplant Recipients
Authors: Getsuwan Songpon , Apiwattanakul Nopporn , Lertudomphonwanit Chatmanee , Hongeng Suradej , Boonsathorn Sophida , Manuyakorn Wiparat , Tanpowpong Pornthep , Anurathapan Usanarat , Tangnararatchakit Kanchana , Treepongkaruna Suporn
Published: November 2023

Cytomegalovirus (CMV) infection is a major opportunistic infection after liver transplantation (LT) that necessitates monitoring. Because of the lack of studies in children, we aimed to investigate CMV-specific T cell immune reconstitution among pediatric LT recipients. The recipients were monitored for CMV infection and CMV-specific T cells from the start of immunosuppressive therapy until 48 weeks after LT. Clinically significant CMV viremia (csCMV) requiring preemptive therapy was defined as a CMV load of >2000 IU/mL. Peripheral blood CMV-specific T cells were analyzed by flow cytometry based on IFNγ secretion upon stimulation with CMV antigens including immediate early protein 1 (IE1) Ag, phosphoprotein 65 (pp65) Ag, and whole CMV lysate (wCMV). Of the 41 patients who underwent LT, 20 (48.8%) had csCMV. Most (17/20 patients) were asymptomatic and characterized as experiencing CMV reactivation. The onset of csCMV occurred approximately 7 weeks after LT (interquartile range: 4–12.9); csCMV rarely recurred after preemptive therapy. Lower pp65-specific CD8+ T cell response was associated with the occurrence of csCMV (p = 0.01) and correlated with increased viral load at the time of csCMV diagnosis (ρ = −0.553, p = 0.02). Moreover, those with csCMV had lower percentages of IE1-specific CD4+ and wCMV-reactive CD4+ T cells at 12 weeks after LT (p = 0.03 and p = 0.01, respectively). Despite intense immunosuppressive therapy, CMV-specific T cell immune reconstitution occurred in pediatric patients post-LT, which could confer protection against CMV reactivation.
Global Prevalence and Hemagglutinin Evolution of H7N9 Avian Influenza Viruses from 2013 to 2022
Authors: Liu Qianshuo , Zeng Haowen , Wu Xinghui , Yang Xuelian , Wang Guiqin
Published: November 2023

H7N9 avian influenza viruses have caused severe harm to the global aquaculture industry and human health. For further understanding of the characteristics of prevalence and hemagglutinin evolution of H7N9 avian influenza viruses, we generated the global epidemic map of H7N9 viruses from 2013 to 2022, constructed a phylogenetic tree, predicted the glycosylation sites and compared the selection pressure of the hemagglutinin. The results showed that although H7N9 avian influenza appeared sporadically in other regions worldwide, China had concentrated outbreaks from 2013 to 2017. The hemagglutinin genes were classified into six distinct lineages: A, B, C, D, E and F. After 2019, H7N9 viruses from the lineages B, E and F persisted, with the lineage B being the dominant. The hemagglutinin of highly pathogenic viruses in the B lineage has an additional predicted glycosylation site, which may account for their persistent pandemic, and is under more positive selection pressure. The most recent ancestor of the H7N9 avian influenza viruses originated in September 1991. The continuous evolution of hemagglutinin has led to an increase in virus pathogenicity in both poultry and humans, and sustained human-to-human transmission. This study provides a theoretical basis for better prediction and control of H7N9 avian influenza.
A Practical Implementation of Quantum-Derived Keys for Secure Vehicle-to-Infrastructure Communications
Authors: Fowler Daniel S. , Maple Carsten , Epiphaniou Gregory
Published: November 2023

We provide a practical implementation of a free space optical quantum key distribution (FSO-QKD) system within a vehicle-to-infrastructure (V2I) application developed under the Innovate UK AirQKD project. The FSO-QKD system provides the quantum secure encryption keys that serve as the foundation for secure communications throughout the V2I application to address known concerns over V2I security. This document includes summaries of the quantum key generation process and the deployed V2I technology. Subsequently, a high-level view of the system design, the practical experiment, and its execution are presented. Multiple AirQKD project partners developed technologies ranging from semiconductors and hardware to security protocols and software, to enable the QKD-secured V2I system. The developed technology includes a novel zero-trust security protocol used to protect the V2I communications, ensuring that spoofed V2I messages from a compromised device are not accepted by the system.
Experimental and Theoretical Reproducibility Research on the Earthquake Resistance of Cylindrical Steel Tanks
Authors: Zhangabay Nurlan , Bonopera Marco , Utelbayeva Akmaral , Tursunkululy Timur , Rakhimov Murat
Published: November 2023

This article analyzes the convergence of the obtained values as a result of the authors’ earlier experimental and theoretical studies. On the basis of the correlations, it was found that the analyses of a traditional cylindrical steel tank without a steel wire strand wrapping and with a filling level of zero by a liquid showed a difference in natural vibration frequencies of 8.4%, while with half and maximal filling by a liquid showed differences equal to 3.2% and 6.2%, respectively. Vice versa, analyses of a cylindrical steel tank with a steel wire strand winding pitch of a = 3d and with a filling level of zero by a liquid showed a difference in natural vibration frequencies of 8.1%, while with half and maximum filling by a liquid and with the same steel wire strand winding pitch showed differences of 10.1% and 5.9%, respectively. Conversely, analyses of a cylindrical steel tank with a steel wire strand winding pitch of a = d and in absence of filling level amounted to a difference of 5.5%, while with half and maximum filling and with the same steel wire strand winding pitch of a = d, differences of 1.6% and 1.4% were, respectively, achieved. Based on the aforementioned results, the general difference between experimental and theoretical vibration frequencies showed up to 10%, which is a satisfactory result of convergence. The obtained findings of this research can be used by engineers and technical workers in the industries of various fields, research institutes and professional companies in designing new earthquake-resistant steel tanks and strengthening existing ones. Conclusions were then mentioned at the end of the article.
Backwater Effects in Rivers and Lakes: Case Study of Dongping Lake in China
Authors: Zhang Xiaolei , Bi Zhengzheng , Sun Xiaoming , Wang Pengtao , Xu Zhiheng , Jia Benyou
Published: November 2023

In the context of global climate change, the frequency of watershed flooding events resulting from extreme rainfall has significantly increased. Especially at river or lake confluences, the presence of backwater effects greatly amplifies the flood risk. To investigate the influence of backwater effects on the hydraulic characteristics of rivers and lakes, this study focuses on the Dongping Lake in China. An enhanced two-dimensional hydrodynamic model was employed to simulate and analyze three different degrees of backwater effects. The results indicate that, compared to the working conditions without the backwater effect, the highest lake water level increased by 1.0 m and 0.1 m under severe and moderate backwater effect conditions, respectively. The total outflow flood volume decreased by 30.1% and 2.3%, respectively. The demolition time for the Jinshan Dam needs to be advanced by 12.5 h and 10.0 h, respectively, and the inundation area in the western region expanded by 2.73% and 0.32%. Additionally, the average inundation depth increased by 0.93 m and 0.08 m, respectively. These results provide valuable data support for the safe operation of Dongping Lake, the formulation of flood defense strategies, and, likewise, offer valuable insights into the risk management of flood events in other rivers and lakes with backwater effects.
Fractional-PID and Its Parameter Optimization for Pumped Storage Units Considering the Complicated Conduit System
Authors: Zhou Xuan , Zheng Yang , Xu Bo , Liu Wushuang , Zou Yidong , Chen Jinbao
Published: November 2023

Speed governing control is significant in ensuring the stable operation of pumped storage units. In this study, a state-space equation mathematical model of the pumped storage governing system considering the complex hydraulic pipeline structure of the pumped storage plant is proposed to describe the system’s dynamic behaviors under small disturbance conditions. Considering the frequent operating condition transitions and the complicated nonlinear dynamic characteristics of the pumped storage units, the fractional-order PID (FOPID) scheme that possesses a higher degree of control freedom than the traditional PID scheme is discussed in detail. To optimize the control parameters of the unit governor, an improved gravitational search algorithm (IGSA) that combines the basic searching mechanisms of the gravitational search algorithm and chaotic search, elastic sphere boundary treatment, and elite guidance strategy is developed. Comparative studies have been carried out under frequency and load disturbance conditions. Simulation results indicate that the control performance of FOPID is better than that of PID under diverse operating conditions and the proposed IGSA has satisfactory parameter optimization capability.
SPENT EDIBLE OIL SOAP ANALYSIS ON CHEMICAL PRACTICUM ACTIVITIES IN SMA HARAPAN III DELI SERDANG
Authors: H Herlina , Harefa Karnirius
Published: November 2023

Spent edible oil is the result of repeated frying that is mostly done in the fast food industry or in household activities and generally this used cooking oil is disposed of as waste that pollutes the waters in the environment. Spent edible oil is a good ingredient for soap making because its raw material is relatively cheaper than most oils. In a simple laboratory study conducted by students of SMA Harapan III Deli Serdang, soap was made from used cooking oil using alkaline NaOH. The saponification process was carried out using used edible oil soap 0.3 parts by mass ratio of NaOH at a concentration of 30% and 1 part of used edible oil bleached with activated charcoal. The analysis of edible oil soap that has been made by determinate the value of free alkali with acid-base titration method and foam stability test. The results obtained from the determination of the foam test provide foam stability of 83.3% and free alkali content of 0.211%. This soap provides a fairly stable foam stability, but it still feels hot in the hands due to the alkaline NaOH that is used not completely soaped in the washing process. The use of edible oil into soap by students can increase knowledge and can be applied to overcome environmental pollution due to the disposal of edible oil into the environment.
EDUCATION GUIDELINES FOR BALANCED NUTRITION FOR PRE-SCHOOL CHILDREN IN METHODIST-6 KINDERGARTEN MEDAN
Authors: Gultom Agustina Boru , Doloksaribu Tiurlan Mariasima
Published: November 2023

Preschool is the time when children are between the ages of 3 to 6 years, where in this phase, they experience a periode of increasing various competencies in themselves in order to prepare them for school. At this time, the child will display optimal development which is shown in his daily life the child receive adequate nutrition, appropriate stimulation for development and proper education. Preschool children had the characteristics of active self-consumption, where children tend to choose foods what they like. This condition allowed a larger number of children in this group to be exposed to a dirty environment, where this situation provides a greater opportunity for infection from various kinds of diseases to children as well as non-optimal nutrition from inadequate food consumption will be associated with worsening health. Kindergarten Methodist-6 was located near the main road where around the school location there were snack for school children. The survey resulted found that many kindergarten children did not know about the guidelines for balanced nutrition. Providing health education regarding balanced nutrition guidelines covering 3 topics consisting of an introduction to balanced nutrition guidelines, principles of balances nutrition, and snacks for children through lectures, questions and answers and discussions, demonstration and redemonstration.  Educational measurement through pictorial quiz consists of 7 questions. Health education regarding balanced nutrition guidelines increased children’s knowledge by 38%. Health education regarding balanced nutrition guidelines can increase knowledge of kindergarten children.
WORKSHOP OF FORMULATION AND EVALUATION BLUSH ON PREPARATION FROM RED ROSE EXTRACT (ROSA DAMASCENE MILL)
Authors: Cahya Cucu Arum Dwi , Tusyifa Rahmah
Published: November 2023

Blush On is a cosmetic preparation that can be used to color the cheeks and aims to produce a tapered and fresher accent on the face. Roses (Rosa damscene Mill) is known to have anthocyanin content that serves as a natural dye and as a bioactive compound that can act as a free radical catching material. The purpose of this study is to make use of red roses as a natural dye on cosmetic preparations namely blush. The extract is obtained by maceration using aquadest and citric acid, blush on formulation made dye from red rose extract with a concentration of 2%, 4% with talcum, zinc oxide, kaolin and nipagin ingredients. Tests conducted include: homogeneity test, organoleptic test, pH test, oles test, irritation test, and crack test. The results of the study with a concentration of 2% and 4% produced a homogeneous blush, pH preparations ranging from 5.0 – 5.5, not cracked when dropped from a height of 8-10 inches, preparations do not irritate. The conclusion of this study shows that red rose extract (Rosa damscene Mill) can be used as a dye in blush preparations. the higher the concentration of the extract used, the darker the pigment color on the preparation.
TRAINING FOR MAKING GINGER AND TEMPE FOOD BARS AS PREVENTIVE PRODUCTS DURING COVID-19 ENDEMY AT THE STUDENT ASSOCIATION OF PUBLIC HEALTH AND NUTRITION INSTITUT KESEHATAN MEDISTRA LUBUK PAKAM
Authors: Panjaitan Raini , Irwanto Reno , Situmorang Risda
Published: November 2023

Currently, the spread of COVD-19 can be directly transmitted between humans, resulting in an extraordinary number of cases throughout 2022 until now. The condition of Covid-19 nutritional intake affects a person's immune system. To increase the acceptance of local products in the student environment, it is done by creating ginger and tempeh flour food bars which play a role in increasing the immune system. The purpose of this activity is to increase knowledge and train the skills of HMKG students. This activity will be held on March 21-22 2022. The venue for this activity is the Lubuk Pakam Medical Institute Campus. The target audience for this activity are active students of the Public Health and Nutrition Association (HMKG) of the Faculty of Public Health, Lubuk Pakam Medistra Health Institute, male and female, with a total of 20 participants. Based on the results of monitoring and evaluation during the socialization and education activities aimed at measuring success, it was found that before the socialization and education were carried out, the average student questionnaire results were 53.33 while after the activities had increased so that the average obtained was 86.66 from the maximum result was 100 points. based on the assessment of the attributes of texture, color, aroma and taste that the results of food bars products are group C. Based on the organoleptic assessment that the highest rating is on aroma. The aroma of the resulting product is the dominant aroma of ginger. Based on the results of this activity, it can be concluded that the HMKG students of the Mediatra Lubuk Pakam Health Institute as partners know the importance of maintaining and improving the body's immune system during the Covid-19 endemic period. In this activity, HMKG students experienced an increase in knowledge.
EDUCATION AND DETECTION OF URIC ACID OF BANDAR KLIPPA COMMUNITY IN PERCUT SEI TUAN DISTRICT, 2022
Authors: Suprianto Suprianto , Samran Samran , Meilani Debi
Published: November 2023

Asam urat sebagai hasil metabolisme senyawa purin atau xanthin, peningkatan konsumsi senyawa purin atau xanthin menyebabkan akumulasi kristal dari senyawa asam urat dengan notabene sukar larut dalam air. Asam urat darah dipengaruhi oleh beberapa faktor, misalnya makanan kaya purin dan xanthin, suku, physic activity, supply alkohol, dan usia. Darah hanya mampu menampung sampai tingkat tertentu, kadar melebihi daya larut, di atas 6,8 mg/dl disebut hiperurisemia, Hiperurisemia bisa berlangsung lama dan sebagian bias menjadi artritis gout. Gout dikenal sebagai penyakit yang dapat menyebabkan penderita mengalami nyeri yang hebat pada sendi. Pengabdian masyarakat dilakukan dengan metode penyuluhan dan pemeriksaan kadar asam urat darah peserta. Masyarakat diharapkan dapat menambah pengetahuan tentang kadar asam urat darah sehingga mengurangi resiko Gout. Serta mengetahui kadar asam urat darah peserta pada saat pengecekan.
CLASS EMPOWERMENT OF PREGNANT WOMEN ABOUT COUNTERPRESSURE EDUCATION AND BIRTH BALL FOR PAIN OF LABOR
Authors: Telova Yurizki , Simarmata Pratiwi Christa , Damayanti Damayanti , Dey Titin Novayanti , Saputri Ika Nur
Published: November 2023

Childbirth is a natural process that every pregnant woman will experience. Labor is defined as the stretching and dilation of the cervix due to contraction of the uterine muscles to promote the expulsion of conception. The labor experienced was a painful, most maternity mothers began to feel the peak of pain in the first stage of the active phase, namely in the maximal dilatation phase and deceleration phase. , and strong so that the sensation of pain felt increased by HIS and the opening of labor affected the pain felt by the mother. The more intense the HIS and the bigger the opening, the stronger the pain, so it requires birthball exercises as a decrease in labor pain scale during pregnancy, Counterpressure is a massage by placing the heel of the hand or the flat part of the hand,  massaged 20 minutes every hour during labor will be more free from pain, can manage fear, create a feeling of comfort, relax and respond positively, Birth ball is a physical therapy ball that helps mothers in the first stage of labor to kneel and lean on the birthball can reduce pain so that mothers are more comfortable . When the birthing  adjust the position, control anxiety and have a birth attendant who can divert her mind from the perception of pain, the pain will decrease. So the combination of Counterpressure Birth Ball is very important for pregnant women to learn when they want to give birth.
WORKSHOP OF FORMULATION ON PREPARATION GEL (ALEURITES MOLUCCANA) AS ANTICEPTIC HAND SANITIZER AGAINST BACTERI STAPHYLOCOCCUS AUREUS
Authors: Cahya Cucu Arum Dwi , Lubis Devi Febby Yola
Published: November 2023

Salah satu cara yang efektif untuk menjaga kesehatan tubuh adalah dengan menjaga kebersihan, salah satunya adalah kebersihan tangan. Salah satu bakteri yang paling sering mengkontaminasi kulit tangan adalah Staphylococcus aureus. Penggunaan gel antiseptik (Hand sanitizer) yang mudah dan praktis semakin diminati masyarakat. Kebanyakan produk gel antiseptik tangan menggunakan alkohol sebagai antibakteri. Kemiri adalah salah satu tumbuhan dengan berbagai manfaat pada setiap bagian pohonnya. Kemiri dapat dimanfaatkan baik sebagai obat-obatan tradisional, bahan makanan, bahan pewarna, penerangan dan berbagai kegunaan lain. Namun belum ada studi yang meneliti apakah formulasi sediaan Gel Hand sanitizer minyak kemiri (Aleurites moluccana) efektif sebagai antibakteri. Penelitian ini untuk mengetahui efektivitas antibakteri minyak kemiri terhadap bakteri Staphylococcus aureus setelah diformulasikan dalam sediaan gel Hand sanitizer pada 3 formula dengan konsentrasi F1=5%, F2=10% dan F3=15%. Penelitian ini adalah penelitian eksperimental. Untuk mengetahui efektivitas anti bakteri minyak kemiri (Aluerites moluccana) terhadap bakteri Staphylococcus. aureus setelah diformulasikan kedalam sediaan gel Hand sanitizer. Penelitian ini menunjukkan bahwa pada formulasi F3 dengan kosentrasi 15% dapat menghambat aktivitas bakteri Staphylococcus aureus dengan zona hambat sebesar 19 mm dengan hasil sediaan gel yang homogen, pH sebesar 5 mendekati pH kulit, tidak mengiritasi kulit dan daya sebar menunjukkan hasil yang merata ke seluruh permukaan kulit yaitu 5 cm. Terdapat penghambatan bakteri Staphylococcus aureus setelah minyak kemiri (Aleurites moluccana) diformulasikan kedalam sediaan gel Hand sanitizer.
TRAINING IN THE PRODUCTION OF ANTI-ACNE CREAM EXTRACTS OF CELERY (APIUM GRAVEOLENS L.) HERBAL EXTRACTS AND COUNSELING ON ITS INHIBITORY TESTS ON BACTERIA GROWTH PROPIONIBACTERIUM ACNES
Authors: Turnip Nur Ulina M. Br. , Yanti Tri Damai
Published: November 2023

Herba seledri (Apium graveolens L) merupakan salah satu tanaman obat yang mengandung flavonoid dan tanin yang berperan sebagai antibakteri. Salah satu bakteri penyebab jerawat adalah bakteri Propionibacterium acnes. Pada penelitian ini ekstrak herba seledri diformulasikan dalam bentuk sediaan krim karena krim mudah diaplikasikan. Penelitian ini bertujuan untuk mengetahui apakah ekstrak herba seledri dapat diformulasikan menjadi sediaan krim dan mengetahui aktivitas antibakteri terhadap bakteri Propionibacterium acnes. Penelitian ini menggunakan metode penelitian eksperimental laboratorium, Krim  dibuat dengan konsentrasi 5%, 10%, 15%,  Selanjutnya dilakukan pengujian sifat mutu fisik diantaranya adalah uji organoleptis, uji pH sediaan, uji homogenitas, Uji Daya Sebar dan uji bakteri dengan  propionibacterium acnes dengan menggunakan metode difusi cakram menggunakan kertas cakram. Dengan menggunakan kontrol positif vitacid 0.025% dan kontrol negatif Blanko. Data  yang diperoleh kemudian dianalisis menggunakan uji One way ANOVA satu arah. Hasil penelitian menunjukkan pengujian bahwa sifat fisik mutu sediaan krim memberikan hasil yang baik dan memenuhi syarat sediaan krim.  Hasil uji aktivitas anti bakteri sediaan krim memberikan diameter rata- rata daya hambat sebesar F1 5%, (4,11 mm) lemah pada F2  10% ( 7,16 mm) sedang, dan F3 15% (11,20 mm) kuat. Berdasarkan hasil penelitian yang diperoleh maka dapat disimpulkan bahwa sedian krim antijerawat dengan konsentrasi ekstrak herba seledri 15% mempunyai daya hambat yang paling kuat terhadap bakteri Propionibacterium acne adalah 11,20 mm. Uji SPSS one way Anova menunjukan p <0,05 yang berarti terdapat perbedaan daya hambat pada berbagai konsentrasi ekstrak terhadap pertumbuhan bakteri Propionibacterium acnes penyebab jerawat.
MASS CIRCUMCISION AS A FORM OF TRUST IN THE COMMUNITY WITHIN THE FRAMEWORK OF GEBYAR LLDIKTI
Authors: Pratidina Eki , Rahayu Sri Mulyati , Sutrisno Entris , Muslim Dede Nur Aziz , Manaf Manaf , Ulfah Diana , Amini Nadia Ushfuri
Published: November 2023

Gebyar LLDIKTI IV Jawa Barat Banten merupakan kegiatan yang diselenggarakan dalam menyambut HUT RI ke-77. Universitas Bhakti kencana merupakan institusi Pendidikan yang berada dibawah koordinasi LLDIKTI Jawa Barat Banten. Sebagai institusi pendidikan dengan mayoritas program studi bidang Kesehatan, Program Studi Diploma III Keperawatan, Program Studi S2 Farmasi dan Program Studi S1 Ilmu Komunikasi ikut andil dalam kegiatan sebagai Tim Kesehatan untuk kegiatan khitanan massal bagi anak-anak yang berasal dari keluarga tidak mampu yang berada di daerah sekitar wilayah LLDIKTI IV Jawa Barat Banten. Kegiatan ini merupakan bagian dari Corporate Social Responsibility (CSR) Universitas Bhakti Kencana dan Pengabdian kepada Masyarakat dosen dalam melaksanakan Tri Dharma Perguruan Tinggi dengan melibatkan mahasiswa dalam pelaksanaan kegiatannya. Khitanan massal diikuti oleh 15 anak yang mendaftar, namun 1 orang tidak hadir karena sakit, sehingga jumlah yang hadir 14 anak. Proses khitanan berjalan dengan lancar dan kondisi anak-anak sehat baik sebelum, saat khitan dan setelah khitan. Harapan untuk tahun yang akan datang kegiatan Gebyar LLDIKTI IV dapat terus terselenggara dengan baik dan dapat membantu meningkatkan derajat kesehatan dan mencegah terjadinya penyakit kelamin yang diakibatkan tidak dilakukannya khitan pada laki-laki.
COUNSELING ON NUTRITION EDUCATION THROUGH VIDEO MEDIA AND LEAFLETS ON CHANGES IN KNOWLEDGE OF FRUIT AND VEGETABLE CONSUMPTION IN PUBLIC HEALTH STUDENTS
Authors: Panjaitan Delita Br , Widyaningsih Fadlilah , Parinduri Anggi Isnani , Rifai Achmad , Wasliati Balqis
Published: November 2023

Fruits and vegetables are important components that the body needs to get nutritional content, where fruits and vegetables contain lots of vitamins, fiber, complex vegetable and animal proteins which are very useful for our bodies. The benefits of consuming fruits and vegetables apart from maintaining health conditions also prevent various chronic diseases that can be harmful to humans such as heart disease, cancer, obesity and other diseases. Adolescents are the most vulnerable age group in terms of consumption of vegetables and fruit, this habit will have a negative impact on health in the future. University students are a transitional group from adolescence to early adulthood. This research was conducted to look at the behavior of eating fruits and vegetables in college students. The study used cross sectional with a quantitative approach with a total of 64 peopleThe five senses that transmit knowledge to the brain are the eyes. This study aimed to determine the effect of nutrition education through video and leaflets media on fruit and vegetable consumption of changes. This study is one group pre-test post-test with the type of research pre experiment. Respondents are students of Colleges, the number of respondents as many as 64 respondents. Data were collected by questionnaire pre-test and post-test as well as the Food Frequency Questionnaire, and analyzed by Paired Samples T-test and Independent Sample T-test with alternative by Wilcoxon and Mann Whitney.