bluuebunny/crossref_metadata_2025 huggingface dataset:
Frequency modeling of trapped charge source for transmission line switching studies in presence of shunt reactor using EMTP/ATPDraw
Authors: Akafi-Mobarakeh Mohsen , Shariatinasab Reza , Vahidi Behrooz
Published: July 2023

Insulation coordination studies are of great importance in power grid reliability. In this paper, a new method is proposed for modeling trapped charge sources (TCS) in switching transient studies. The TCS is used to take account of the voltage stored in line capacitors during reclosing operation after fault occurrence. The proposed model is designed based on the active filter concept, so it does not have the limitations of conventional TCS for simulating transient states in EMTP/ATPDraw. Given the natural frequencies of the transmission line to which the proposed TCS (PTCS) is connected, the PTCS injects the appropriate frequencies and eliminates voltage oscillations, which limit the use of TCS. To verify the efficiency of the PTCS, it is implemented in a real system with a shunt reactor, and the results are then compared with field measurements. A comparison of the results shows that the PTCS eliminates the voltage oscillations in the simulation before closing and provides a smooth voltage with the desired amplitude. Using the proposed model, the maximum line switching overvoltage is correctly calculated; this, in turn, results in a more accurate transmission line insulation design, which is technically and economically beneficial.
Structural and Ionic conductivity studies of aluminium doped PVP-MgBr 2 Nano composite films
Authors: Srinivasa J. , Basha Sk. Shahenoor
Published: July 2023

In this present study, nano composite polymer films are prepared based on PVA and Magnesium Bromide (MgBr2) with doping of additive plasticizers (Al2O3) with different ratios using Solution cast technique. XRD pattern confirms the semi crystalline nature of the polymer films. The ionic conductivity of the prepared films is measured by using AC impedance spectroscopy and it is found to be at 10− 2 S/cm. The electrical conductivity studies are carried out by DC ionic conductivity set up and for the composition 85 (PVP):15(MgBr2):0.1(Al2O3), the high ionic conductivity is found to be at \(1.25\times {10}^{-2} \text{S}/\text{c}\text{m}\) at room temperature. The conductivity is found to rise with an increase in temperature. The temperature dependent conductivity of the polymer electrolyte follows the Arrhenius relationship which shows hopping of ion mechanism in the polymer matrix. The transference numbers are calculated using Wagner DC Polarization technique and the majority of charge carrier’s are found to be ions rather than electrons. The charge distribution is studied at electrode–electrolyte interface by dielectric properties. Finally a solid state battery has been fabricated with the combination of Mg/(PVP + MgBr2:Al2O3)/(I2 + C + electrolyte) and discharge characteristics of the cell measured is up to 180 Hrs.
Prediction of the safety margin in the creep crack growth process using damage mechanics and fracture mechanics
Authors: Nowak Krzysztof
Published: July 2023

Comparison of different methods for the prediction of failure time and the determination of the safety limit for structure cracking in creep conditions is presented in this paper. Analyses using fracture mechanics (FM) and damage mechanics (DM) tools have been performed. In the case of FM, the C*-integral and C(t)-integral are used. For DM models, the Kachanov equation was chosen as the basic one. To avoid the strain and damage localisation and thus the mesh-dependence of the solution, the nonlocal integral method was used. The simulations of creep crack growth were presented for a compact tension sample made of 316 stainless steel at a temperature of 550°C. The problems encountered when solving the problem with the selected methods were listed. The results attained by analysed methods were compared and the most appropriate results were indicated. Obtaining a satisfactory solution of the given problem is difficult. Presented methods allow to achieve some approximations of the time to failure in relatively simple manner. They can be especially useful when not the absolute but relative solutions, like safety factors, are seek.
Barriers and Facilitators to Implementing a Canadian Shared-Care ADHD Program in Pediatric Settings in Shanghai: A Consolidated Framework for Implementation Research Approach
Authors: Bahraini Sayna , Maisonneuve Alexander , Wu Danping , Huang Minhui , Xu Mingyu , Yang Li , Li Fei , Samson André , Li Feng , Robaey Philippe
Published: July 2023

Objectives: The vast majority of children with attention deficit hyperactivity disorder (ADHD) do not have access to proper diagnosis and treatment in China. The goal of this project is to identify the challenges and facilitators in implementing a Canadian ADHD Shared Care Pathways program in pediatric settings in Shanghai region.
Methods: Purposive semi-structured focus groups were conducted on a total of 13 healthcare practitioners from the Shanghai Xinuha, Ninghai and Chongming hospitals. Two independent researchers conducted a thematic analysis of the data with themes emerging based on the Consolidated Framework for Implementation Research (CFIR).
Results: Notable barriers identified by participants included: 1) lack of knowledge in the management of ADHD, primarily among general practitioners; 2) lack of resources such as lack of staff, time, and medication for ADHD; 3) challenges in implementing an international multicentre intervention (such as communication difficulties between teams and integration of resources available in different hospitals); and 4) mental health stigma, difficulties in identifying ADHD patients, and logistical problems related to medication procurement rules put in place by provincial governments. Notable facilitators included: 1) the strong motivation of stakeholders and their confidence in their ability to learn and subsequently execute action plans to achieve the implementation goal; 2) the compatibility between the values and goals of the stakeholders and those of the program despite some cultural tension, a positive learning climate, strong tensions for change, and the high interest of organization leaders in engaging in the program 3) the perceived benefits of the program, such as standardization of the diagnostic and treatment process, and engaging primary care providers in ADHD management; and 4) the strong relationship between participating institutions and schools as well as provincial health initiatives available to support collaborative models of care. Mixed factors to implementation were also explored.
Conclusions: Appropriate training of health care providers, cultural adaptation of the program, increase public awareness about ADHD to decrease stigma, as well as strong project management and guidelines that clearly describe the role and expectations of each team member appeared essential to successful implementation.
Feasibility of new types of technological equipment in the manufacture of nonrigid flat aluminum parts
Authors: Khramov A. V. , Zhirukhin K. S. , Kiselev E. S.
Published: July 2023

In this work, we assess the efficiency of the SCHUNK VERO-S Aviation clamping system in manufacturing nonrigid aluminum parts in comparison with the existing technology of their small-scale production at domestic aircraft plants. The research was conducted using the facilities of mechanical shops that manufacture nonrigid aircraft parts to estimate the time and economic expenditures involved in their production when changing the cutting mode and machining allowances. The proposed technological process was implemented by the HALTEC Russian engineering company at an aircraft manufacturing plant of the Russian Federation. The duration of the technological process amounted to a total of 14 hours, with the existing production technology lasting for 300 hours. The process duration was reduced by eliminating two thermal stabilization operations and shortening the machine-setting time by 50%. The machine-setting time was reduced by increasing the number of cutting mode elements during manufacturing of a non-rigid aluminum part using this tooling, as well as by using a modified machining strategy. The use of the SCHUNK VERO -S Aviation system together with a modified machining strategy for a thin-walled non-rigid workpiece allows for an almost complete compensation of deformations caused by residual stresses of the first kind. The new modern technology of SCHUNK VERO -S Aviation proves to be effective for the small-volume and series production of thin-walled nonrigid components of the required quality without warping, multiple straightening operations, thermal and temporal stabilization.
Effect of blueberry (vaccínium myrtíllus) leaves extract, obtained by microwave heating on the dynamics of animal fat oxidation processes
Authors: Bazhenova B. A. , Leskova S. Yu. , Dobretsky R. A. , Khankhalaeva I. A. , Shalbuev D. V. , Kong B.
Published: July 2023

The potential of antioxidant properties of blueberry leaves extract (vaccínium myrtíllus) that grows in the Trans-Baikal region has been studied in this work. In order to increase the efficiency of extraction of biologically active substances with antioxidant properties, this extract was obtained with the help of microwave field. The optimal parameters for the extraction of active substances from the blueberry leaves with the help of electromagnetic microwave field have been defined. The influence of the power of the electromagnetic field and the duration of the process of blueberry leaves extraction on the efficiency of extraction of biologically active polyphenolic substances has been studied. The following parameters of the technology for blueberry leaves extraction were obtained: extraction with a water-alcohol solution with a concentration of 40% in the ratio of raw materials to extractant as 1 to 5, with duration of stirring as long as 30 minutes, then the application of an electromagnetic field of microwave heating with a power of 850W for 8–10 minutes long. Blueberry leaves extract is a clear liquid with a high content of polyphenols, of rich brown color, tart taste, without bitterness. The antioxidant potential of the obtained extract has been studied. To do this, the extract has been added into the finely ground animal fat and left for storage in a closed dark container. During storage, the dynamics of the peroxide number has been measured, as this value characterizes the degree of lipid oxidation. It has been found that blueberry leaves extract inhibits the process of animal fat oxidation due to the action of biologically active substances that feature antioxidant properties.
Ruling out light axions: The writing is on the wall
Authors: Beyer Konstantin A. , Sarkar Subir
Published: July 2023

We revisit the domain wall problem for QCD axion models with more than one quark charged under the Peccei-Quinn symmetry. Symmetry breaking during or after inflation results in the formation of a domain wall network which would cause cosmic catastrophe if it comes to dominate the Universe. The network may be made unstable by invoking a “tilt” in the axion potential due to Planck scale suppressed non-renormalisable operators. Alternatively the random walk of the axion field during inflation can generate a “bias” favouring one of the degenerate vacua, but we find that this mechanism is in practice irrelevant. Consideration of the axion abundance generated by the decay of the wall network then requires the Peccei-Quinn scale to be rather low - thus e.g. ruling out the DFSZ axion with mass below \sim∼ 11 meV, where most experimental searches are in fact focused.
Annihilating dark matter search with 12 years of Fermi LAT data in nearby galaxy clusters
Authors: Thorpe-Morgan Charles , Malyshev D. , Stegen C.-A. , Santangelo Andrea , Jochum J.
Published: July 2023

Galaxy clusters contain an abundance of dark matter making them attractive laboratories for indirect DM searches. This work details a search for signals of pair annihilation from WIMP dark matter in the GeV gamma ray regime. We perform this search in five low zz and high galactic latitude galaxy clusters (Centaurus, Coma, Virgo, Perseus and Fornax); using nearly 12 years of Fermi/LAT data. Through the non-detection of this characteristic signal, we derive constraints on the annihilation cross-section of DM pair annihilation into the b\overline{b}bb‾, W^+W^-W+W− and \gamma\gammaγγ channels. The limits obtained are of a comparable magnitude to those of recently derived from Fermi/LAT observations of dwarf spheroidal galaxies.
A PROSPECTIVE STUDY OF REFRACTIVE SURGERY OUTCOMES IN PATIENTS WITH MESOPIC PUPIL SIZE - PHAKIC COLLAMER LENSES VS SURFACE ABLATION
Authors:   Resident Department of Ophthalmology., Bhattacharya Shimran , Ramabharthi N. ,   Professor and Head Department of Ophthalmology.,   Department of Ophthalmology, Rangaraya Medical College, Kakinada.
Published: July 2023

Purpose- The aim of this study was to evaluate and compare the visual outcomes of night vision and contrast sensitivity in patients undergoing phakiccollamer lenses (ICL) or surface ablation (PRK) Method of Study- A prospective nonrandomised study in which 50 eyes of patients with myopic astigmatism and pupil size of 6.51 Â± 0.8 mm were studied. The contrast sensitivity and visual outcome( 2 months postoperative) was measured with Rabin super vision test, under normal low light conditions.
LEVERAGING MACHINE LEARNING AND REMOTE SENSING FOR WILDLIFE CONSERVATION: A COMPREHENSIVE REVIEW
Authors:   Assistant Professor, International Institute of Business Studies, Bengaluru., a Drakshayini , S.T Mohan ,   Assistant Professor, Dr NSAM First grade College, Bengaluru., M. Swathi ,   Assistant Professor, Atria Institute of Technology, Bengaluru., Nanjundeshwara Kadali ,   Assistant Professor, East West school of Business Management Bengaluru.
Published: July 2023

In recent years, the application of machine learning and remote sensing technologies in wildlife conservation has demonstrated tremendous promise. This article provides a comprehensive overview of the advancements in these fields and the impact they have had on various aspects of wildlife conservation. These technologies contribute to more efficient and effective conservation strategies by automating species identification, mapping and monitoring habitats, tracking population dynamics, detecting wildlife crime, and analysing animal vocalisations. This article talks about the development of machine learning algorithms capable of classifying bird and amphibian calls, differentiating fish species, and identifying plant species such as orchids and cacti has made automated species identification possible. Incorporating machine learning algorithms with remote sensing techniquesprovides significant advantages for mapping and monitoring habitats. This article discusses that images captured by camera trapswhen combined with acoustic analysis, can help in monitoring population by enabling automated detection and tracking. These technologies provide efficient and non-invasive approaches to monitor and manage animal populations, from estimating animal density using passive acoustics to identifying and tracking endangered species such as tigers, cheetahs, and sea turtles using camera trap images. The analysis of animal vocalisations using machine learning techniques has revealed information about species behaviour, population dynamics, and habitat quality. Examining the acoustic communication of species such as black rhinoceros and Yangtze finless porpoise has been the focus of research. Acoustic analysis provides a non-invasive method for comprehending the communication patterns of animals and their implications for conservation efforts. By utilising artificial intelligence and remote sensing data, conservationists can make informed decisions and take targeted actions to protect and preserve endangered species and their habitats. These technologies continued development and application hold great promise for the future of wildlife conservation.
ERGONOMICS IN ENDODONTICS-A REVIEW
Authors:   Headof Department, Department of Conservative Dentistry and Endodontics, KVG Dental College and Hospital Sullia, D.K., Prasada L. Krishna , Kumar K. Naveen ,   Professor, Department of Conservative Dentistry and Endodontics KVG Dental College, Sullia D.K., M. Sayoojya ,   Post Graduate Student, Department of Conservative Dentistry and Endodontics KVG Dental College, Sullia D.K.
Published: July 2023

Ergonomics is a prime area which is often neglected and goes unnoticed always. Dentist are always prone to musculoskeletal disorders due to their improper working postures and indirect vision.Among dentist itself Endodontistface a great difficulty.Ergonomics if applied properly prevent majority of occupational disorders.This article provide light into risk factors faced by dentist and the role of ergonomics to solve it which provides better health to clinician which in turn leads to better treatment and both clinician and patient satisfaction.
DETERMINATION DE LA RESISTANCE SHUNT DUNE PHOTOPILE IRRADIEE (N+/P/P+) AU SILICIUM PLACEE SOUS CHAMP MAGNETIQUE ET SOUS ECLAIREMENT POLYCHROMATIQUE EN MODULATION DE FREQUENCE
Authors:   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal., SARR Mor , CHEIKH MohamedLemine ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal., GUEYE Sega ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal., BA M.Yacine ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal., LOUM Khady ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal.,   Institut Universitaire de Technologie. Universite Iba Der THIAM de Thies-Senegal., NDIAYE Malick ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal., Mamour BA A. ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal., SOW Ousmane ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal.,   Institut Universitaire de Technologie. Universite Iba Der THIAM de Thies-Senegal., MBODJI Senghane ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal.,   Universite Alioune DIOP, Bambey, Senegal., SISSOKO Gregoire ,   Groupe International de Recherche en Energie Renouvelable (GIRER). BP. 15003, Dakar, Senegal.
Published: July 2023

Lobjet de cette etude est de presenter une application de la technique de determination de la vitesse de recombinaison a la jonction initiant la situation de court-circuit dune photopile monofaciale au silicium, , sous eclairement polychromatique, sous irradiation et sous champ magnetique, en regime dynamique frequentiel. Apres la resolution de lequation de magneto-diffusion des porteurs minoritaires de charges en regime dynamique, les expressions de la densite des porteurs minoritaires de charge et de la densite de photocourant ont ete etablies. La densite des porteurs minoritaires de charge est etudiee en fonction de la profondeur dans la base de la photopile pour differentes valeurs de la frequence de modulation. La densite de photocourant est etudiee en fonction de la vitesse de recombinaison a la jonction pour differentes frequences de modulation. A partir du profil de variation de la densite de photocourant en fonction de la vitesse de recombinaison a la jonction, une technique de determination de la vitesse de recombinaison a la jonction initiant la situation de court-circuit est presentee. Les influences de la frequence de modulation, de lirradiation et du champ magnetique sur la vitesse de recombinaison a la jonction initiant la situation de court-circuit, sur le photocourant de court-circuit et sur la resistance shunt ont ete egalement etudiees.
A baseline study on mortality and air pollution in Kabyle village (northern Algeria) under COVID-19
Authors:   UFR of Psychology, University of Reims Champagne-Ardenne, France, Benamara Djedjiga , Benamara Youcef ,   ADENTIS, Ile de France, France, Benamara Salem ,   University M’hamed Bougara, Boumerdès, Algeria
Published: July 2023

The present work is a preliminary study of mortality data and fine particulate matter (≤ 2.5 µm, PM2.5) concentration in Kabyle village (northern Algeria) under COVID-19. Three epidemiological measures were used to quantify COVID-19-attributable mortality during the years 2019, 2020, 2021 and the first half of 2022, namely monthly death count, crude excess mortality (EM) and P-score (%). In addition, PM2.5 concentration was measured three times minimum in the morning (between 6:00 and 10:00 a.m.) for 2 to 25 days depending on the month, from August to October 2021 and from January to June 2022 to look for a possible correlation between air quality and monthly excess mortality. The P-score, as the most interesting parameter for comparison purposes, was found to range from approximately -67 % (in 2021, for women 65 years and older) to 133 % (in 2021, for men 65 years and older). For those under 65, the P-score is undefined, either because their EM is zero (the case in 2021 for men under 65) or because expected mortality is zero. The daily PM2.5 concentration varied from 0.5 to 150 µg/m3 during the entire observation period. A moderate positive correlation was found between monthly EM and monthly PM2.5 concentration, for women of all ages only (Kendall’s tau (τ) ~ 0.22, p = 0.00). This work could inspire other larger studies, which should include, for example, all the 23 villages of the municipality, considering other air pollution parameters with, in addition, a more consequent recording frequency.
An overview of present treatment and valorification methods used for plastic waste
Authors:   National Research and Development Institute for Industrial Ecology, Constantinov Florenta Daniela , Constantin Mirela Alina ,   National Research and Development Institute for Industrial Ecology
Published: July 2023

Most frecquent used methods for recycling and treating plastic waste, with their advantages and disadvantages were analysed and investigated. Plastic waste present a slow degradation rate in nature, almost one thousand years, therefore it is important to address this type of pollution, by finding the most sustainable methods in reducing the percentage of plastic that ends up in landfills or in the ocean. The negative impact of plastic waste include bioaccumulation in organisms by exposure to micro and nano plastics that end up in the environment from degrading macro plastics or directly from products that contain microplastic, like exfoliating personal care products.
Analytical method for the determination of Hg from the organs of some terrestrial plants using cold vapor atomic absorption spectrometry
Authors:   National Research and Development Institute for Industrial Ecology, Tenea Anda-Gabriela , Dinu Cristina ,   National Research and Development Institute for Industrial Ecology, Vasile Gabriela Geanina ,   National Research and Development Institute for Industrial Ecology, Chiriac Florentina Laura ,   National Research and Development Institute for Industrial Ecology, Iancu Vasile Ion ,   National Research and Development Institute for Industrial Ecology, Niculescu Marcela Antoneta ,   National Research and Development Institute for Industrial Ecology, Petre Jana ,   National Research and Development Institute for Industrial Ecology
Published: July 2023

The aim of the study was to develop a new method for mercury determination from plants grown on mercury-polluted soils as well as to evaluate the mobility and bioavailability of mercury in the soil and its transfer to different plant organs (root, stem, leaves) from three different plants, such as mustard (Sinapis alba), thyme (Thymus serpyllum) and wild thyme. A cold vapor atomic absorption spectrometry (CV-AAS) method for the detection of mercury in plants was developed. The developed method was validated in the laboratory and was verified using two different certified reference materials (CRMs) type matrices, namely: NIST 1515 Apple Leaves and BCR-482 Lichen.
Recent Update on Pharmacokinetics and Drug Metabolism in CNS-based Drug
Discovery
Authors: Sanap Sachin Nashik , Bisen Amol Chhatrapati , Kedar Ashwini , Agrawal Sristi , Bhatta Rabi Sankar
Published: July 2023

Despite significant advancements in CNS research, CNS illnesses are the most important and serious
cause of mental disability worldwide. These facts show a tremendous unmet demand for effective CNS medications
and pharmacotherapy since it accounts for more hospitalizations and extended care than practically all
other disorders combined. The site-targeted kinetics of the brain and, pharmacodynamics of CNS effects are
determined/regulated by various mechanisms after the dose, including blood-brain barrier (BBB) transport and
many other processes. These processes are condition-dependent in terms of their rate and extent because they
are dynamically controlled. For effective therapy, drugs should access the CNS “at the right place, time, and
concentration”. Details on inter-species and inter-condition variances are required to translate target site pharmacokinetics
and associated CNS effects between species and illness states, improving CNS therapeutics and
drug development. The present review encircles a short discussion about the barriers that affect effective CNS
treatment and precisely focuses on the pharmacokinetics aspects of efficient CNS therapeutics.
An Explicative Review on the Current Advancement in Schiff Base-Metal
Complexes as Anticancer Agents Evolved in the Past Decade: Medicinal
Chemistry Aspects
Authors: Karati Dipanjan , Mukherjee Swarupananda , Roy Souvik
Published: July 2023

In the recent era, developments in the field of bio-inorganic chemistry have improved
interest in Schiff base complexes (imine scaffolds) for their pharmacological excellence in different
areas. Schiff bases are a kind of synthetic molecule that is synthesized by the condensation reaction
between a 1o amine and a carbonyl compound. Imine derivatives are also acknowledged for their
ability to form complexes with several metals. Due to their wide range of biological activities, they
have acquired prominence in the therapeutic and pharmaceutical industries. Inorganic chemists have
continued to be intrigued by the vast range of uses of these molecules. Many of them are also thermally
stable and have structural flexibility. Some of these chemicals have been discovered to be beneficial
as clinical diagnostic agents as well as chemotherapeutic agents. Because of the flexibility of
the reactions, these complexes have a wide range of characteristics and applications in biological
systems. Anti-neoplastic activity is one of them. This review attempts to draw attention to the most
notable examples of these novel compounds, which have excellent anticancer activity against different
cancers. The synthetic scheme of these scaffolds, their metal complexes, and the explanation of
their anticancer mechanism reported in this paper lead the researchers to design and synthesize more
target-specific Schiff base congeners with little or no side effects in the future.
Management of Young Permanent Teeth (Apexogenesis, Apexification and Regenerative Endodontics)
Authors: Goyal Varinder , Sakhare Dhanashree , Iyer Vidya
Published: July 2023

Traumatic injuries suffered by the anterior teeth mostly occur before completion of the root formation which may have consequences like inflammation or necrosis of the pulp. The most sensitive part of a young permanent tooth to trauma is the Hertwig’s epithelial root sheath (HERS). However, root formation can still continue to occur if there is a disruption of vascularity and cellularity in the apical region, even in the presence of pulpal inflammation and necrosis of the traumatized teeth. Hence, every effort should be made to maintain the viability of HERS as it acts as a source of undifferentiated cells which could give rise to the formation of the hard tissue and it also protects the tooth against the ingrowth of the cells of periodontal ligament into the root canal, which might result in intracanal bone formation and cessation of root development. In cases where complete destruction of Hertwig's epithelial root sheath occurs, the development of a normal root comes to a halt but, this does not mean that there is an end to the deposition of hard tissue in the region of the root apex. Although, once the sheath has been destroyed, there can be no further differentiation of odontoblasts but, the hard tissue can still be formed by cementoblasts which are present in the apical region or by fibroblasts of the dental follicle and periodontal ligament cells that undergo differentiation after the injury. This chapter is specifically oriented towards discussion of the viable methodology and treatment modalities of vital, nonvital immature young permanent teeth.
Chemical composition of chicken intestines pre-dried with vegetable meals: alternative protein for aquaculture
Authors: León Aroldo Botello , Pérez-Corría Kirenia , Méndez-Martínez Yuniel , Ortega-Ojeda Marcos , Martínez-Aguilar Yordan , Rodríguez-Valera Yoel , Cisneros-López Mario , Morán-Montaño Charles
Published: July 2023

Objective. Characterizing the chemical composition of pre-dried chicken intestines with vegetable meal (VM), as an alternative source of protein for aquaculture. Materials and methods. Chicken intestines, powdered, cooked and defatted (CIGCD), were mixed individually with VM: rice powder (RP), wheat bran (WB), palm kernel cake (PKC), cornmeal (CM) and soybean meal (SBM), in proportions (w:w): 80:20, 70:30, 60:40, 50:50 and 40:60 (CIGCD:VM), for a total of 20 experimental treatments, according to a completely randomized design. Dry matter, crude protein, lipid, fiber, ashes, gross energy (MJ kg-1) and costs were evaluated. The principal component analysis (PCA) were applied to verify the interaction between proportions. Results. The proportions with higher levels of CIGCD, protein and lipid content increased (p<0.05), with reduced cost (p<0.05). Those with higher values of VM, fiber and ash showed high values (p<0.05). The mixtures with SBM, high figures of protein, energy and costs (p<0.05) and with PKC the lowest costs (p<0.05). Conclusions. The proportions of CIGCD:VM reached high levels of dry matter, which facilitated the dehydration process. The content of protein, lipid, energy and costs, obtained in the different mixtures, accredits them as possible aquaculture feed, to replace conventional protein in diets, according to the species, productive purpose and market requirements. The PCA with covariance matrix suggests that the mixtures CIGCD:VM, the treatments CIGCD:SBM (80:20), CIGCD:SBM (70:30) and CIGCD:SBM (60:40) have better nutritional characteristics, although, the CIGCD:PKC (80:20) ratio showed high protein levels and was the most economical.
Frequency of Prenatal Care Visits: Protocol to Develop a Core Outcome Set for Prenatal Care Schedules (Preprint)
Authors: Turrentine Mark , Nguyen Buu-Hac , Choby Beth , Kendig Susan , King Tekoa L , Kotelchuck Milton , Moore Simas Tiffany A , Srinivas Sindhu K , Zahn Christopher M , Peahl Alex Friedman
Published: July 2023

BACKGROUND

Prenatal care, one of the most common preventive care services in the United States, endeavors to improve pregnancy outcomes through evidence-based screenings and interventions. Despite the prevalence of prenatal care and its importance to maternal and infant health, there are several debates about the best methods of prenatal care delivery, including the most appropriate schedule frequency and content of prenatal visits. Current US national guidelines recommend that low-risk individuals receive a standard schedule of 12 to 14 in-office visits, a care delivery model that has remained unchanged for almost a century.

OBJECTIVE

In early 2020, to mitigate individuals’ exposure to the SARS-CoV-2 virus, prenatal care providers implemented new paradigms that altered the schedule frequency, interval, and modality (eg, telemedicine) of how prenatal care services were offered. In this paper, we describe the development of a core outcome set (COS) that can be used to evaluate the effect of the frequency of prenatal care schedules on maternal and infant outcomes.

METHODS

We will systematically review the literature to identify previously reported outcomes important to individuals who receive prenatal care and the people who care for them. Stakeholders with expertise in prenatal care delivery (ie, patients or family members, health care providers, and public health professionals and policy makers) will rate the importance of identified outcomes in a web-based survey using a 3-round Delphi process. A digital consensus meeting will be held for a group of stakeholder representatives to discuss and vote on the outcomes to include in the final COS.

RESULTS

The Delphi survey was initiated in July 2022 with invited 71 stakeholders. A digital consensus conference was conducted on October 11, 2022. Data are currently under analysis with plans to submit them in a subsequent manuscript.

CONCLUSIONS

More research about the optimal schedule frequency and modality for prenatal care delivery is needed. Standardizing outcomes that are measured and reported in evaluations of the recommended prenatal care schedules will assist evidence synthesis and results reported in systematic reviews and meta-analyses. Overall, this COS will expand the consistency and patient-centeredness of reported outcomes for various prenatal care delivery schedules and modalities, hopefully improving the overall efficacy of recommended care delivery for pregnant people and their families.

INTERNATIONAL REGISTERED REPORT

DERR1-10.2196/43962
Considerations for Quality Control Monitoring of Machine Learning Models in Clinical Practice (Preprint)
Authors: Faust Louis , Wilson Patrick , Asai Shusaku , Fu Sunyang , Liu Hongfang , Ruan Xiaoyang , Storlie Curt
Published: July 2023

UNSTRUCTURED

Integrating machine learning (ML) models into clinical practice presents a challenge of maintaining their efficacy over time. While existing literature offers valuable strategies for detecting declining model performance, there is a need to document the broader challenges and solutions associated with the real-world development and integration of model monitoring solutions. This work details the development and use of a platform for monitoring the performance of a production-level ML model operating in Mayo Clinic. In this paper, we aimed to provide a series of considerations and guidelines necessary for integrating such a platform into a team’s technical infrastructure and workflow. We have documented our experiences with this integration process, discussed the broader challenges encountered with real-world implementation and maintenance, and included the source code for the platform. Our monitoring platform was built as an R shiny application, developed and implemented over the course of 6 months. The platform has been used and maintained for 2 years and is still in use as of July 2023. The considerations necessary for the implementation of the monitoring platform center around 4 pillars: feasibility (what resources can be used for platform development?); design (through what statistics or models will the model be monitored, and how will these results be efficiently displayed to the end user?); implementation (how will this platform be built, and where will it exist within the IT ecosystem?); and policy (based on monitoring feedback, when and what actions will be taken to fix problems, and how will these problems be translated to clinical staff?). While much of the literature surrounding ML performance monitoring emphasizes methodological approaches for capturing changes in performance, there remains a battery of other challenges and considerations that must be addressed for successful real-world implementation.
A Mobile Applet for Assessing Medication Adherence and Managing Adverse Drug Reactions Among Patients With Cancer: Usability and Utility Study (Preprint)
Authors: Ni Chenxu , Wang Yi-fu , Zhang Yun-ting , Yuan Min , Xu Qing , Shen Fu-ming , Li Dong-Jie , Huang Fang
Published: July 2023

BACKGROUND

Medication adherence and the management of adverse drug reactions (ADRs) are crucial to the efficacy of antitumor drugs. A WeChat applet, also known as a “Mini Program,” is similar to the app but has marked advantages. The development and use of a WeChat applet makes follow-up convenient for patients with cancer.

OBJECTIVE

This study aimed to assess the usability and utility of a newly developed WeChat applet, “DolphinCare,” among patients with cancer in Shanghai.

METHODS

A qualitative methodology was used to obtain an in-depth understanding of the experiences of patients with cancer when using DolphinCare from the usability and utility aspects. The development phase consisted of 2 parts: alpha and beta testing. Alpha testing combined the theory of the Fogg Behavior Model and the usability model. Alpha testing also involved testing the design of DolphinCare using a conceptual framework, which included factors that could affect medication adherence and ADRs. Beta testing was conducted using in-depth interviews. In-depth interviews allowed us to assist the patients in using DolphinCare and understand whether they liked or disliked DolphinCare and found it useful.

RESULTS

We included participants who had an eHealth Literacy Scale (eHEALS) score of ≥50%, and a total of 20 participants were interviewed consecutively. The key positive motivators described by interviewers were to be reminded to take their medications and to alleviate their ADRs. The majority of the patients were able to activate and use DolphinCare by themselves. Most patients indicated that their trigger to follow-up DolphinCare was the recommendation of their known and trusted health care professionals. All participants found that labels containing the generic names of their medication and the medication reminders were useful, including timed pop-up push notifications and text alerts. The applet presented the corresponding information collection forms of ADRs to the patient to fill out. The web-based consultation system enables patients to consult pharmacists or physicians in time when they have doubts about medications or have ADRs. The applet had usabilities and utilities that could improve medication adherence and the management of ADRs among patients with cancer.

CONCLUSIONS

This study provides preliminary evidence regarding the usability and utility of this type of WeChat applet among patients with cancer, which is expected to be promoted for managing follow-up among other patients with other chronic disease.
Effect of Shot Peening on Fatigue Properties for Corroded and Uncorroded (CK35) Steel
Authors: Arbilei Marwan N. , Hamed Jamal Mohammed
Published: July 2023

The traction property is one of the important mechanical properties, especially the rotary parts which are subjected to constant and variable loads There are many methods used to improve this property, and the shoot peening by metal balls is considered the most critical one. the study focuses on this characteristic of steel CK35 used in many engineering applications as the rotating shafts and railway This study shows that the fatigue strength is improved by14% after shoot peening with metal balls. The study includs the rehabilitation of damaged samples as a result of fatigue corrosion. The standard solution adopted was 36% MgCl­2 with a 30 days immersion period. These samples has been improved by 6% after it decreased by18% due to immersion in the alkaline solution.
What do corporate learners experience in the Metaverse?
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Seo Seong-Eel , Lee Eun-Taek , Kim Se-Yeon , You Yeong-Mahn
Published: July 2023

Objectives The purposes of this study was to explore how corporate learners perceive and experience the learning environment in the metaverse.
Methods In this study, in-depth interviews were conducted with 17 employees from Company A who experienced an educational program in the metaverse. The data were analyzed through coding, categorization, and classification in three stages to investigate the experiences of learning through the metaverse.
Results The learning experiences were categorized into six top-level categories: adaptation to the metaverse environment, utilization of avatars, interaction within the learning process, acquisition of knowledge, perception of presence, and outcomes of metaverse experiences. Each category was further subdivided into 14 subcategories.
Conclusions Learners adapted to the metaverse without difficulty and attributed significant meaning to being the agents of action by moving and engaging with avatars within the learning process. Furthermore, they experienced a sense of presence through self-directed interactions. It is important to design learning content that considers the learning space and encourages learner-centered activities, rather than traditional classroom settings. Additionally, designing instructional environments that take into account the diverse interactive functionalities of the metaverse is necessary.
The Mediating Effect of Strengths Knowledge in a Relationship between Depression and Academic Motivation
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Jung Sookhee , Joung Daeun
Published: July 2023

Objectives The objective of this study was to verify and analyze the effects of depression on academic motivation of university students, focusing on the mediating effects of strengths knowledge.
Methods For the purpose, a total of 401 H University students was surveyed, and the results of the analysis were conducted using Jamovi 2.2.5 and Process Macro for SPSS 4.0. The results of the study were as follows.
Results First, a statistically significant negative correlation was confirmed between depression and academic motivation as well as depression and strengths knowledge of the university students. On the other hand, strengths knowledge and academic motivation were found to have a positive correlation. Second, the students' depression significantly predicted academic motivation, indicating that the higher levels of depression were associated with higher levels of academic motivation. Third, the strengths knowledge has a complete mediating effect in the relationship between depression and academic motivation of the students. This interpreted as the result that the more university students with higher levels of depression perceive their own strengths, the more motivated they are to study.
Conclusions The results of this study suggest that the higher the level of strengths knowledge of university students experiencing depression, the higher academic motivation, and that it is necessary to intervene to let them discover their strengths in order to increase academic motivation. Based on this, the direction to be sought to improve the academic motivation of university students was suggested.
Development and validation of home learning environment
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Lee Ga-Hyung
Published: July 2023

Objectives The purpose of this study is to develop and validate a test that can measure the home learning environment perceived by university students.
Methods The home learning environment test was composed of three valiables ; parent-child relationship, reading environment, learning support environment. The necessary for home learning environment by analyzing the environment that can be learned at home through previous research and extracting factors. This test is an environment for home learning, and it is a test that can comprehensively measure the home learning environment that can measure the environment that parents should provide. The subjects of this study were 460 university students, and a total of 450 data were analyzed except for 10 insincere data., The collected data were statistically processed by descriptive statistics, correlation, reliability test, exploratory factor analysis, and confirmatory factor analysis by using SPSS 27.0 and AMOS 25.0 programs.
Results The reliability of the parent-child relationship among the sub-factors of the home learning environment was Cronbach α .905, the reliability of the reading environment was Cronbach α .896, the reliability of the learning environment was Cronbach α .899, and the reliability of the whole home learning environment was Cronbach α .933.
Conclusions This test proved its validity through exploratory factor analysis and confirmatory factor analysis, and it will be used as basic data to check important environmental factors when parents teach their children at home.
The Effect of Early Childhood Teachers’ Autonomy and Play Support Competency on the Play Implementation of the 2019 Revised Nuri Curriculum
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Ju Mi , Jang Sang Ock
Published: July 2023

Objectives The purpose of this study was to examine the effect of early childhood teachers’ autonomy, play support competency on the play implementation of the in the 2019 Nuri curriculum.
Methods For data collection, 324 early childhood teachers in Gyeongnam province were surveyed by questionnaires about teachers’ autonomy, play support competency on the play implementation of the in the 2019 Nuri curriculum from 30 May 2022 to 12 Jun. For data analysis, descriptive statistics, Pearson’s correlation , and hierarchical regression analysis were used by SPSS 25.0.
Results First, early childhood teachers' autonomy, play support competency, and play implementation of the 2019 revised Nuri curriculum were in high level. Second, there was a significant positive correlation among the teachers’ autonomy, play support competency, and play implementation of the 2019 revised Nuri curriculum. Third, early childhood teachers’ autonomy and play support competency was found to influence on the play implementation of the 2019 revised Nuri curriculum.
Conclusions This results suggest that in order to enhance play implementation of the 2019 revised Nuri curriculum, teacher’s autonomy and play support competency need to be improved.
The Effects of Early Childhood Teachers' Grit and Teacher Efficacy on Job Satisfaction
Authors:   Korean Association For Learner-Centered Curriculum And Instruction, Cho Seong Jin , Ahn Youn Kyoung
Published: July 2023

Objectives The purpose of this study is to analyze the effect of grit and teacher efficacy of early childhood teachers on job satisfaction.
Methods A survey was conducted on 211 teachers working at early childhood education institutions located in N and S cities in Chungcheongnam-do, and technical statistical analysis, reliability and correlation analysis, and multiple regression analysis were conducted using SPSS 23.0.
Results First, it was found that there was a positive correlation between the grit of early childhood teachers and teacher efficacy and job satisfaction. Second, the grit and teacher efficacy of early childhood teachers had an effect on job satisfaction, and grit was identified as a factor that had a relatively large effect on job satisfaction. Among the grit's sub-factors, passion, persistence, and continuity of interest had a significant effect on job satisfaction, and among teacher efficacy, a sense of calling and teaching ability had a significant effect on job satisfaction. In particular, grit had a relatively greater influence on job satisfaction than teacher efficacy.
Conclusions Grit and teacher efficacy can play an important role as variables affecting job satisfaction of early childhood teachers, so measures should be sought to increase the positive effects of grit and teacher efficacy of early childhood teachers.