bluuebunny/crossref_metadata_2025 huggingface dataset:
Modelling Psychological Time Series with Multilevel Hidden Markov Models: A Numerical Evaluation and Tutorial
Authors: Aarts Emmeke , Haslbeck Jonas M B
Published: November 2024

Time series are becoming a common type of data in psychological research, allowing us to study the dynamics of human functioning at an unprecedented level of granularity. Much of the current modelling work focuses on variations of vector autoregressive (VAR) models, in which variables are predicted by themselves and other variables at previous time points. An alternative to these models are Hidden Markov Models (HMMs), which model time series with a process that switches between a number of latent states, each associated with a different response distribution. Despite the fact that HMMs are often both theoretically interesting and can provide a better model fit for many time series, HMMs have rarely been used to model psychological time series. The reason for this has been the lack of software to fit HMMs in a multilevel setting, which is required both to make estimation feasible in a realistic applied setting, and to quantify and account for heterogeneity between subjects. In this paper, we address this issue by introducing multilevel HMMs and their estimation in a Bayesian setting; we evaluate with numerical experiments how well these models can be estimated in settings corresponding to empirical research using the R package mHMMbayes; and we provide a fully reproducible tutorial that guides the reader through all steps of model selection, model checking, and interpretation using an openly available dataset on emotion dynamics. Finally, we discuss the potential positive impact of adding multilevel HMMs to the time series modelling toolbox and discuss directions for further methodological improvements.
Mapping the publisher types and collaborations behind Web of Science indexed journals
Authors: Taskin Zehra , Pölönen Janne , Kulczycki Emanuel , Laakso Mikael
Published: November 2024

Although the organisational aspects of scholarly journals—such as the types of organisations responsible for publishing individual journals, whether independently or in collaboration—have significant implications for scholarly communication, they have received little focused research attention on a large scale. This study provides a comprehensive analysis of all WoS-indexed journals (N=21,886), focusing on the type of organisations that are officially attached to publishing the journals, either alone or together. We also investigate the disciplinary, geographical and linguistic diversity, and the key bibliometric characteristics, of journals (co)published by different types of organisations. By augmenting WoS metadata with a custom classification concerning organisational information about the journals publishing and governing organisations available through the International ISSN Centre, this study provides a larger and more detailed analysis than has been available so far. Our results show that 66% of journals are published by a sole organisation type (professional, research organisation, society), and 34% respectively are published through combinations of these different organisation types. The most common form of collaboration was a professional publisher with a scholarly society as the collaborative organisation.
Analysis of Design Changes from Main Engine Diesel Engine to Electric Engine on Fishing Vessels
Authors: Ramadhani Dimitry Rizal , Pranatal Erifive
Published: November 2024

Fishing vessels in Indonesia conventionally use diesel engines as their main propulsion engine. However, the use of diesel engines has quite a bad impact on the surrounding environment. So the latest innovations using alternative energy are needed. One of them is the use of electric engines as a replacement for diesel engines in the ship's main propulsion engine. The use of this electric machine will have a friendly impact on the environment. Apart from that, you don't need to spend a lot of money to maintain this electric machine. We can see this by comparing the ship's thrust requirements with maximum speed.
Optimization of Fused Deposition Modeling (FDM) Machine Parameters for Carbon Fiber Tensile Strength Using the Taguchi Method
Authors: Prayoga Adimas Dwi , Mukti Abdi Satryo , Mahameru Rolland Darin Khalifah , Rosyadi Willdan , Lestari Wahyu Dwi
Published: November 2024

3D printing using Fused Deposition Modeling (FDM) technology has emerged as a promising approach for manufacturing components with composite materials such as carbon fiber. This study aims to optimize the parameters of FDM machines for carbon fiber tensile strength using the Taguchi Method. The optimized FDM machine parameters include nozzle temperature, infill density, printing speed, layer thickness, infill pattern, and orientation. Experiments were conducted based on the Taguchi experimental design with an L27 Orthogonal Array (3^6) matrix, resulting in 27 experiments with different parameter combinations. After printing was completed, tensile tests were performed to measure the tensile strength of the printed samples. The results of the analysis using the Taguchi Method show the optimal settings of the FDM machine parameters to achieve maximum tensile strength for carbon fiber material. The analysis results show that the parameters that can optimize the tensile test response are nozzle temperature at level 2 (230°C), infill density at level 3 (80%), printing speed at level 3 (100 mm/s), layer thickness at level 3 (0.3 mm), infill pattern at level 1 (line), and orientation at level 3 (30°) with the highest tensile test value of 27.7766 MPa. This study provides an important contribution to the development of 3D printing techniques with carbon fiber, by identifying the optimal settings that can improve the mechanical performance of printed components. It is expected that the results of this study can be used as a practical guideline for the 3D printing industry in optimizing FDM machine parameters for printing carbon fiber-based composite materials.
Educação inclusiva: Reflexões a partir das Concepções de Gaudêncio Frigotto
Authors: Dos Santos Ozivane , Rocha Aride Paulo Henrique
Published: November 2024

O presente estudo baseia-se em concepções direcionadas e abordadas pelo pesquisador Gaudêncio Frigotto, com base na obra “Concepções e mudanças no mundo do trabalho e o ensino médio”. Este objetivou sensibilizar e tecer discussões sobre o ensino e mundo de trabalho como oportunidades para todos, sem distinção. Haja vista que o trabalho tem uma importância vital para a subsistência humana, portanto todos precisam estar em tempo oportuno preparados para o exercício do trabalho. Pois no pensamento de Frigotto se faz eficaz que a unidade de ensino se apresente de forma adequada no intuito de atender os estudantes, sem distinção de forma satisfatória em sua participação na cidadania e construção da sociedade.
Assessment of ovarian reserve in women of early reproductive age
Authors:   Ye.A. Vagner Perm State Medical University, Meteleva T.A. ,   Perm, Russia, Olina A.A. ,   Ye.A. Vagner Perm State Medical University; Perm, Russia,   D.O. Ott Research Institute of Obstetrics, Gynecology and Reproductology; St. Petersburg, Russia
Published: November 2024

Abstract Aim. Improvement of reproductive health preservation methods based on the assessment of the ovarian reserve in women of early reproductive age. Design. A clinical observational study with mixed methodology, involving a selective uncontrolled, dynamic, prospective full-scale, based on primary data. Materials and methods. A total of 181 women aged 18–25 were examined. The patients’ body mass index and level of physical activity (according to the ODA23+ Physical Activity Questionnaire), were assessed. Anti-Müllerian hormone levels and the number of antral follicles were measured using pelvic ultrasound. The list of risk factors for decreased ovarian reserve was compiled based on literature sources. Statistical analysis of the obtained data was performed using the StatTech v. 2.8.8 software. Results. The average of anti-Müllerian hormone level of the examined patients was 7.8 ± 0.39 ng/ml. Patients with a value below 1.2 ng/ml were detected in 4 (2.2%) women, while in 33 (18.2%) it exceeded the upper limit of the laboratory norm (12 ng/ml). It was found that statistically significantly lower levels of anti-Müllerian hormone were in patients with overweight/obesity (p = 0.002), smokers (p = 0.005), in case of very low physical activity (p = 0.029). Anamnestic risk factors for decreased ovarian reserve were identified in 72 (39.8%) cases, with smoking and hypothyroidism most frequently combined (in 13 (86.8%)). Conclusion. Determination of the risk group for decreased ovarian reserve is the basis for discussing an individual reproductive strategy and methods of preserving fertility in each woman during the period of reproductive choice. The proposed list of risk factors for decreased ovarian reserve could be included in the first stage of medical screening for patients of reproductive age to assess reproductive health. Further research on anti-Müllerian hormone as a marker for screening assessment of women's reproductive health is necessary. Keywords: ovarian reserve, anti-Mullerian hormone, smoking, body mass index, risk factors.
Ischemic Heart Disease; An Overview of Atypical Presentation & Misdiagnosis
Authors: Malik Nawwai Abrar Bakry
Published: November 2024

Cardiovascular disease is considered to be one of the main causes of death worldwide. The most common cardiovascular disease is ischemic heart disease (IHD). The cause of IHD is coronary blood flow reduction therefore also known as “coronary heart disease”. Incidence of IHD has been increase worldwide. IHD symptoms and sign range from typical classic chest pain to atypical e.g., epigastric discomfort and seizure. Patients present with atypical picture been misdiagnosed, this lead in delay of providing the appropriate care and treatment which will lead to worse outcomes and even death. In this review we are aiming to study the different clinical pictures of IHD mainly atypical presentation so patient can be treated earlier. Also, we are studying risk factors associated with IHD so can be managed as long as possible.
Giant Hiatal Hernia and P4HB Phasix TMST Mesh Hiatoplasty Outcomes
Authors: K S Viswanath Yirupaiahgari
Published: November 2024

Surgical repair of giant hiatal hernia (GHH) and associated high recurrence rate defy technological advances in surgical sciences despite better instrumentation and availability of various mesh prostheses. Aim: This study evaluates the safety and efficacy of long-lasting biosynthetic absorbable Poly 4 Hydroxybutyrate Phasix TMST mesh outcomes in patients with GHH undergoing hiatal hernia repair. Methods: We studied a prospectively maintained database of all patients who underwent GHH repair between September 2020 and October 2023. Primary outcome measures were 30-day mortality and postoperative morbidities. Secondary outcome measures were 90-day readmission rates, patient-reported outcomes derived through modified Visick grading and recurrence of hiatus hernia. Results: 44 patients were included in this study. Median follow-up is twenty-four months. There was no mortality at 30 days. 4.5% (n=2) experienced significant complications at 30 days. Median length of stay was 3 days. 81% reported clinical improvement with enhanced Visick grade, and proton-pump inhibitor (PPI) cessation rate was 77.4%. There were no readmissions at 90 days. 9.1% who reported symptom recurrence had anatomical hiatus hernia recurrence. Conclusion: The study showed laparoscopic hiatoplasty with P4B Phasix TMST mesh has low morbidity and recurrence with medium-term follow-up.
The Cardiac Fulcrum Comments
Authors: Jorge Trainini
Published: November 2024

This research reaffirmed, through multiple dissections in bovine and human hearts, that the ventricular myocardium is made up of a set of muscle fibers twisted on themselves resembling a rope (rope model), flattened laterally, which by making two spiral turns, it defines a helicoid that delimits the two ventricles and shapes their functionality.[1,2] This development led us for a long time to ask about the need for the heart to have support, this topic constituting an essential concern in our research.
Sinusoidal Atrial Fibrillation (Yasser’s Fibrillation) and Partial SAN Function in COVID-19 Pneumonia; a New Cardiovascular Discovery Change in Atrial Fibrillation Directory
Authors: Hassanain Elsayed Yasser Mohammed
Published: November 2024

Introduction: Atrial fibrillation (AF) is one of the most common and probable serious arrhythmias and a hallmark of an increasing risk of pathological thrombus formation. Interestingly, normal sinus rhythm (NSR) is the standard rhythm in a normal person. The sino-atrial node (SAN) is the heart's pacemaker and generator of the normal electrical conduction system of the heart which allows for the generating of electrical impulses. In AF, the normal regular electrical impulses generated by the sinoatrial node are overwhelmed by disorganized electrical waves, usually originating from the roots of the pulmonary veins. These disorganized waves conduct intermittently through the atrioventricular node (AVN) leading to irregular activation of the ventricles that generate the heartbeat. Cases presentation: Four different cases were described. 1. An elderly female patient presented to the ICU with metastatic complicated Mantle cell lymphoma, COVID-19 pneumonia, and irregular heart rate. 2. A senile male patient presented to the intensive care unit (ICU) with an aortic aneurysm, COVID-19 pneumonia, consumptive thrombocytopenia, lung fibrosis, and irregular heart rate. 3. A middle-aged female presented to the ICU with chronic renal failure (CRF) on regular hemodialysis, liver cell failure (LCF), pseudo-orange abdominal cellulitis, valvular heart replacement, and irregular heart rate. 4. An elderly female patient presented with cardiomyopathy, global cardiomegaly, irregular heart rate, diabetes, pseudo-orange abdominal cellulitis, liver cirrhosis, and COVID-19 pneumonia. Method of study and patients: Retrospective-Observational four case report series study was conducted in Kafr El-Bateekh Central Hospital staring from January 21, 2023 and ending on June 24, 2024 on COVID-19 pneumonia and atrial fibrillations. Conclusion: Sinusoidal atrial fibrillations (Yasser’s fibrillation) or mixed AF are a new cardiovascular discovery. The partial sino-atrial nodal function has essential role in the presence of Sinusoidal atrial fibrillations (Yasser’s fibrillation) or mixed AF and its interpretation. Sinusoidal atrial fibrillations (Yasser’s fibrillation) or mixed AF may be balanced between AF and normal sinus rhythm. The percentages of normal sinus beats to AF beats in the cases of Sinusoidal atrial fibrillations (Yasser’s fibrillation) may be a guide for approximate healthy or sick part of the sinoatrial node. Widening the research for the Sinusoidal atrial fibrillations (Yasser’s fibrillation) or mixed AF will be recommended.
Gen Z Perspective of E-Commerce Logistics Service Quality on Home Delivery After Pandemic: Sem Approach to Satisfaction of Customer and Loyalty
Authors: Mallieswari R. , Mishra Niharika , Jeevitha R.
Published: November 2024

With recent technological advancements, internationalization, and, of course, the epidemic of COVID-19, the number of electronic retail planning activities has grown rapidly. But the goal of this research is to examine how Gen Z perceives the quality of electronic retail logistics services for home delivery during a pandemic and to pinpoint the aspects of electronic retail logistics service quality that influence the Satisfaction of customers. Additionally, it seeks to discover whether there exists a relationship between the degrees of consumer delight and brand adherence among those Gen Z customers who shop online. An email-based survey was used to gather data from 302 online shoppers in Bangalore, India. The association between the selected factors has been investigated using Structural Equation Modelling (SEM). Customers are more likely to be satisfied when orders are delivered on time, in good condition, accurately, and without difficulties. Customer loyalty and Satisfaction of customers were found to be positively correlated.
Evolution of the northeastern margin of the Kazakhstan paleocontinent: results of petro-geochemical study of sedimentary and volcanogenic-sedimentary rocks of the Zharma-Saur island arc zone
Authors: Penkina V. A. , Kotlera P. D. , Safonova I. Y. , Khromykh S. V. , Perfilova A. A. , Kulikova A. V. , Galimullin I. A.
Published: November 2024

We carried out studies of petrography, petrochemistry, geochemistry and Nd-isotopy of sedimentary and volcanic rocks, as well as U‒Pb dating of detrital zircons from sandstones and tuff sandstones of four stratigraphic units of the Zharma-Saur island arc zone, located in the Middle-Late Paleozoic near the north eastern (in modern coordinates) edge of the Kazakhstan paleocontinent. The data obtained, geological structure and analysis of discriminant diagrams indicate that the formation of sandstones of the Givetian‒Frasnian sequence was the result of erosion and destruction of the Early Paleozoic igneous complexes of the Chingiz-Tarbagatai zone of the Kazakhstan paleocontinent. Tuff sandstones of the Koyanda formation of the Tournaisian stage and the Tersairyk formation of the Visean stage, distributed within the Vorontsov-Saur subzone, are mainly a product of rock destruction and volcanic activity of the Zharma-Saur volcanic arc. The feeding provinces for the sedimentary rocks of the Kokon formation of the Visean stage, which occupies most of the Zharma-Sarsazan subzone, were simultaneously the Caledonides of the Chingiz-Tarbagatai zone and the Early Carboniferous volcanogenic complexes of the Zharma-Saur volcanic arc. Our data show that the Zharma-Saur arc developed near the northeastern margin of the Kazakhstan paleocontinent at the end of the Late Devonian‒in the Early Carboniferous period.
Geological position, structural manifestations of the Elbistan earthquake and tectonic comparison of two strongest seismic events 06.02.2023 in Eastern Türkiye
Authors: Trikhunkov Ya. I. , Ҫelik H. , Lomov V. S. , Trifonov V. G. , Bachmanov D. M. , Karginoglu Y. , Sokolov S. Yu.
Published: November 2024

The Elbistan (Ҫardak) earthquake with magnitude Mw = 7.5 or 7.6 happened in Eastern Anatolia on 06.02.2023 at 10:24 UTC, following the strongest in the region of East Anatolian (Pazarçik) earthquake with Mw = 7.8 which occurred on the same day at 1:17 UTC to the south of the region. The Elbistan earthquake activated adjacent segments of the Ҫardak and Uluova faults with Quaternary left-lateral strike-slip displacements. The resulting seismic ruptures have a total length of 190 km, of which 148 km are represented by sinistral lateral slip. Their maximum amplitude of 7.84 m was recorded 8 km east of the epicenter. The strike-slip seismic ruptures of the Elbistan and East Anatolian earthquakes represent exposure of their focal zones on the land surface. Both earthquakes exceed average values of these parameters for continental earthquakes of strike-slip type in terms of focal zone sizes and amplitudes of seismic displacements. At the same time, both sources do not propagate deeper than the upper part of the crust (16–20 km).
Ophiolite complexes covering the same depths are widely spread in the area of focal zones of both earthquakes. Two maxima were found in the distribution of seismic strike-slip displacement along the epicentral zone of the Elbistan earthquake (i) amplitudes of 5.7–7.84 m in the Ҫardak fault zone and (ii) amplitudes of 3.5–5.1 m in the Uluova fault zone. Both maxima coincide to the areas of ophiolites or their contacts with basement rocks. In crystalline basement rocks, the sinistral strike-slip amplitudes are significantly reduced. We attribute the increased values of focal zone sizes and displacement amplitudes of both earthquakes to the rheological features of ophiolites, which increase a possibility of slip of rocks during seismic movements. We explain the fact that the sources of both earthquakes cover only the upper part of the crust, by the uplift of the top of rocks with reduced P-wave velocities, including the upper mantle and the lower part of the crust and interpreted as heated rocks with reduced strength.
Long Bone Morphology and Histology of the Stem Salamander Kulgeriherpeton ultimum (Caudata, Karauridae) from the Lower Cretaceous of Yakutia
Authors: Skutschas P. P. , Saburov P. G. , Uliakhin A. V. , Kolchanov V. V.
Published: November 2024

The morphology and histological structure of the humerus and femur of the stem karaurid salamander Kulgeriherpeton ultimum Skutstchas et al., 2018, from the Lower Cretaceous Teete locality, Republic of Sakha (Yakutia) is described. The microanatomical and histological structure of K. ultimum is characterized by the presence of a thick compact primary cortex formed by a parallel-fibred bone; the absence (in the humerus) or presence of a small medullary cavity in the middle of the diaphysis; the presence of a medullary cavity expanding toward the epiphyses, which passes in the proximal and distal parts into a complex network of sinuous canals, partially replaced by erosion bays; the presence of primary vascular canals and growth marks in the primary cortex; the presence of remnants of unresorbed cartilage and the Kaschenko’s line; active secondary remodeling with the formation of erosion bays similar to those in large-sized salamanders (other stem karaurid salamanders and cryptobranchids). Skeletochronological analysis of the humerus of K. ultimum showed that at the time of the animal's death, its individual age was 13-16 years, and the absence of a reduction in the distance between cyclic growth marks in the periphyric part of the cortex indicates that it belonged to an actively growing individual that had not reached its maximum possible size. The similarity in the morphology of the humerus and femur of K. ultimum and modern aquatic neotenic salamanders (absence of a dorsal crest on the humerus for the attachment of m. subcoracoscapularis, less high, displaced forward trochanter of femur, shallow ventral fossa (fossa trochanterica) on the femur), as well as the presence of remnants of cartilage and preservation of Kashchenko's line in the internal structure of limb bones confirm conclusions about aquatic life style and neotenic nature of stem karaurid salamanders.
Crystal Structure of Lanthanide Salts with 2,4-Dichlorophenoxyacetic Acid
Authors: Kiskin M. A. , Konnik O. V. , Shulgin V. F. , Gusev A. N.
Published: November 2024

Compounds of three types, [LnL3(C2H5OH)] (Ln = Nd (I), Sm (II), Eu (III)), [LnL3(H2O)] (Ln = = Gd (IV), Tb (V)), and [DyL2(NO3)(C2H5OH)2] (VI), were obtained by reactions of lanthanide nitrate with NaL (L– = 2,4-dichlorophenoxyacetate anion) in ethanol. The composition and structure of complexes I–VI were investigated by elemental and thermogravimetric analysis, IR spectroscopy, and X-ray diffraction (nos. 2311578 (I), 2311579 (II), 2311580 (III) 2311581 (IV), 2311582 (VI)). All compounds have a one-dimensional polymer structure in which metal atoms are connected by bridging carboxylate groups. The π–π interactions and intermolecular contacts between the chains give rise to a three-dimensional supramolecular structure.
Pseudopolymeric Thallium(I) Di-iso-pentyl Dithiophosphate, [Tl{S2P(O-iso-С5H11)2}]: Synthesis, Structural Organization (Role of Secondary Tl⋅⋅⋅S and Tl⋅⋅⋅O Interactions in Supramolecular Self-Assembly), and Thermal Behavior
Authors: Bredyuk O. A. , Lutsenko I. A. , Nelyubina Yu. V. , Zinchenko S. V. , Ivanov A. V.
Published: November 2024

Crystalline pseudopolymeric thallium(I) di-iso-pentyl dithiophosphate (Dtph), [Tl{S2P(O-iso-С5H11)2}] (I), is synthesized and characterized in detail by single-crystal XRD (CIF file CCDC no. 2296421), simultaneous thermal analysis (STA), multinuclear (1H, 13C, 31P) NMR and IR spectroscopy. Nonequivalent molecules of two types containing Tl(1) and Tl(2) atoms (hereinafter molecules А and В, respectively) are involved (1 : 1) in the formation of the structure of compound I. In both molecules, the S,S´-anisobidentate coordination of the Dtph ligands (Tl–S bond lengths 3.006–3.092 Å) results in the formation of small-size four-membered metallocycles [TlS2P] (a 'butterfly' conformation) with significantly averaged P–S bond lengths (1.966–1.985 Å). Molecules A and B are structurally ordered upon the construction of supramolecular chains of two types (⋅⋅⋅A⋅⋅⋅A⋅⋅⋅A⋅⋅⋅)n and (⋅⋅⋅B⋅⋅⋅B⋅⋅⋅B⋅⋅⋅)n with oppositely directed structural units combined by paired secondary Tl⋅⋅⋅S and Tl⋅⋅⋅O interactions alternating over the chain length. In turn, paired secondary (but weaker) Tl⋅⋅⋅S interactions occur between molecules A and B belonging to two neighboring pseudopolymeric chains. The multiplisity of these interactions provides the formation of double supramolecular ribbons. The thermal behavior of compound I is studied by the STA technique under an argon atmosphere. Thallium(I) tetrathiophosphate Tl3PS4 is identified as the only end product of the thermolysis of compound I. Electron probe microanalysis (EPMA) and scanning electron microscopy (SEM) are used to study the residual substance.
Seasonal changes in the content of fatty acids in the skeletal muscles of the long-tailed ground squirrel Urocitellus undulatus
Authors: Kulagina T. P. , Vikhlyantsev I. M. , Aripovsky A. V. , Popova S. S. , Gapeyev A. B.
Published: November 2024

Seasonal changes in the fatty acid composition in four skeletal muscles of the true hibernant Yakut long-tailed ground squirrel Urocitellus undulatus were studied. Measurements were taken on animals of four experimental groups: summer active, autumn active, winter dormant, and winter active. An increase in the total amount of fatty acids was found in winter in the quadriceps muscle of the thigh (m. vastus lateralis), the triceps muscle of the forearm (m. triceps), and the psoas muscle (m. psoas). In all muscles, including m. gastrocnemius, a decrease in the total amount of saturated fatty acids was observed in winter. An increase in the total amount of monounsaturated fatty acids in winter hibernating animals occurred in the quadriceps femoris muscle, triceps muscle of the forearm, and in the psoas muscle. In winter active animals, the total content of polyunsaturated fatty acids in the quadriceps femoris and psoas muscles increased. A significant decrease in palmitic acid content in sleeping and winter active ground squirrels compared to summer and autumn animals was found in all muscles studied. The amount of palmitoleic acid significantly increased in sleeping animals in the quadriceps femoris and psoas muscles. In the triceps muscle of the forearm. the amount of palmitoleic acid increased in autumn active and winter dormant individuals. The amount of oleic acid was increased in all muscles of winter hibernating animals relative to active autumn animals. The content of linoleic acid significantly increased in winter active ground squirrels in all muscles except the gastrocnemius. In the autumn period the amount of dihomo-gamma-linolenic acid also increased in all muscles, with a significant decrease in its content in winter sleeping and winter active animals to the level of summer (seasonal) control. The results obtained indicate that most changes in fatty acid composition have the same direction in all four studied skeletal muscles of the long-tailed ground squirrel. Possible roles of seasonal changes in fatty acid composition and the participation of fatty acids in biochemical processes in the muscle tissue of the long-tailed ground squirrel are discussed.
Distribution of progesterone receptors and the membrane component of progesterone receptor in various organs and tissues of male and female rats
Authors: Dmitrieva A. D. , Morozov I. A. , Karhov A. M. , Rubtsov P. M. , Smirnova O. V. , Shchelkunova T. A.
Published: November 2024

Progesterone regulates reproductive processes and affects many functions of various non-reproductive organs. Its effects in mammals and humans are mediated by nuclear (nPRs) and membrane progesterone receptors (mPRs). The action of progesterone through different types of receptors may differ significantly and has tissue specific features. The expression of known types and subtypes of progesterone receptors in the tissues of male and female rats has been studied fragmentarily. The purpose of our work was to study the expression of five mPRs genes, as well as the nPRs gene and the membrane component of the progesterone receptor PGRMC I in the reproductive organs and in 17 non-reproductive tissues of male and female rats using reverse transcription followed by real-time PCR. In this study, it was shown that a high level of nPRs gene expression in rats is found not only in reproductive organs of females (uterus, ovary, mammary glands), but also in seminal vesicles of males, in the brain and trachea of both sexes, in blood vessels, and in the pancreas of females. The highest level of expression of mPRs genes of all subtypes was found in the testes, while expression of the gene encoding nPRs was practically undetectable in them. Expression of genes encoding mPRs was also detected in the liver and spleen of male and female rats, while expression of the gene encoding nPRs was at background levels. Virtually no expression of nPRs, mPRs, and membrane component of progesterone receptor (PGRMC I) genes was detected in muscle, and its level was very low in the heart in animals of both sexes. We found sex-specific differentiation of nuclear and membrane receptor mRNA levels in rats in non-reproductive tissues, characterized by a predominance of nPRs transcripts and three subtypes of mPRs (α, β, δ) in females and two subtypes of mPRs (γ, ε) in males. Data on the presence of progesterone receptors in tissues not involved in reproduction confirm the effect of progesterone on these organs. High levels of mRNA for various progesterone receptors in the tissues of male rats, such as the pancreas, lungs, kidney, and trachea, indicate an important physiological role of progestins not only in females, but also in males, which is still poorly understood. The work also discusses the known functions of progesterone receptors in the tissues studied.
Development of an applied variant of the kolmogorov–johnson–mehl theory of crystallization for processing thermal analysis data. Temperatures and enthalpies of melting germanium isotopes
Authors: Kutin A. M. , Plekhovich A. D. , Gavva V. A. , Bulanov A. D.
Published: November 2024

An applied kinetic model has been developed for processing DSC peaks of transitions between states, determining the temperature–time dependence of the degree of transition and combining the fundamental theory of Kolmogorov–Johnson–Mehl crystallization, simplified for practice, with the semi-empirical Erofeev model. In the development of this applied model, the concept of a “thermodynamic factor” is introduced, which allows a transition in the kinetics of phase transformations of condensed matter. The application of the new approach is demonstrated by the example of studying the dependences of temperature and enthalpy of fusion on the average atomic mass of stable germanium isotopes, data on which, as new chemical individuals, are of a fundamental nature and can serve as reference information.
IMPLEMENTASI MEDIA TOGA BERBASIS QR CODE PADA PEMBELAJARAN TEMATIK UNTUK MENIGKATKAN LITERASI SAINS DAN DIGITAL PESERTA DIDIK KELAS III SD
Authors: Asy'ari Muhammad Hasan , Sudarti Sudarti , Wuryaningrum Rusdhianti , Wicaksono Iwan
Published: November 2024

This study aims to describe the implementation of QR Code-based "Tanaman Obat Keluarga" (TOGA) media in thematic learning at SD Negeri Penawungan 02, which is located in Ranuyoso sub-district, as a means of enhancing scientific literacy and digital literacy among third-grade students. This research is descriptive in nature, and the data were collected through observation and questionnaires. The findings indicate that the use of QR Code-based TOGA media successfully improved students' scientific and digital literacy. This is evidenced by the comparison of the average pre-test and post-test scores, which showed a significant increase from 63 to 80. In other words, the percentage of students achieving mastery increased from 60% to 80%. Additionally, the use of this media enhanced students' scientific and digital literacy skills by involving the use of smartphones and QR code reader applications. Students gained a better understanding of scientific concepts such as the properties, benefits, uses, and roles of medicinal plants in health and the environment, while also becoming more proficient in operating smartphones, including connecting to the internet and using QR code reader applications. Thus, the implementation of QR Code-based TOGA media at SD Negeri Penawungan 02 in Ranuyoso sub-district has successfully enhanced the scientific and digital literacy of third-grade students.
EVALUASI PEMBELAJARAN BERBASIS HOTS BERBANTUAN QUIZ BASED LEARNING MATERI PENERAPAN PANCASILA UNTUK MENINGKATKAN CRITICAL THINKING SKILL SISWA KELAS V SD
Authors: Amaliya Fadlilatul Ilmi , Alfi Cindya , Fatih Mohamad
Published: November 2024

The aim of this research is to develop a Higher Order Thinking Skills (HOTS)-based learning evaluation by Quiz-Based Learning (QBL) on the subject of Pancasila application to enhance the critical thinking skills of fifth-grade students. This study employs a research and development method through the ASSURE development steps. The experimental design used was a pre-test and post-test design. The results of the study show that the media, as evaluated by media experts, received a validity score of 94%, while the score given by subject matter experts reached 90%, with both considered highly valid. Additionally, teacher responses on the feasibility aspect achieved 95%, also considered highly feasible. Lastly, the results showed an improvement on students' critical thinking skills with an N-gain score of 0.9, indicating a high level of improvement. Therefore, it can be concluded that HOTS-based learning supported by QBL on Pancasila application material is feasible to use for enhancing critical thinking skills.
PENGARUH MODEL PEMBELAJARAN THINK TALK WRITE (TTW) BERBANTUAN MEDIA FLIPBOOK PADIKU TERHADAP KETERAMPILAN MENULIS SISWA KELAS V SD
Authors: Fatihatin Dian Azizatul , Fakhriyah Fina , Kironoratri Lintang
Published: November 2024

The aim of this study is to describe the effect of the Think Talk Write (TTW) learning model by Padiku flipbook media on the writing skills of fifth-grade students. This research applied a pre-experimental design with a one-group pretest-posttest method. The population of the study consists of all 18 fifth-grade students at SD 2 Hadipolo, using a saturated sampling technique. The results of the study indicate that there is an effect of the TTW learning model supported by Padiku flipbook media, as shown by the Paired Sample T-Test results with a Sig(2-tailed) value of 0.000 < 0.05. Thus, it can be concluded that the use of the TTW learning model, supported by the Padiku flipbook media, has a significant impact on students' writing skills. Student responses to the use of the TTW learning model with the Padiku flipbook media indicate that it made learning more active, enjoyable, engaging, and facilitated students' understanding of the material being taught.
PENGEMBANGAN MEDIA CERITA BERGAMBAR BERBASIS CERITA RAKYAT KEDIRI PADA MATERI PENDAPAT PRIBADI ISI BUKU SD
Authors: Putri Septa Rosdiana , Hunaifi Abdul Aziz , Damariswara Rian
Published: November 2024

The use of engaging and interactive learning media can help students become more enthusiastic and motivated in their learning. This study aims to develop a picture story-based learning media centered on Kediri folklore, which is rich in cultural values. The research method used is the ADDIE research and development model, consisting of the stages of analysis, design, development, implementation, and evaluation. The illustrated folklore learning media was found to meet the criteria for validity, practicality, and effectiveness, with a limited trial yielding a 100% success rate and a broader trial showing 90%, both of which are considered highly effective in learning. This media is concluded to be suitable for elementary school students and also introducing students to local folklore, including stories such as Mount Kelud, Totok Kerot, and the Tale of Calon Arang.
PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF BERBASIS APLIKASI CANVA MATERI NORMA DAN ADAT ISTIADAT DAERAHKU KELAS IV SD NEGERI 72 PALEMBANG
Authors: Ramadani Tri Novita Sapar , Puspita Yenny , Oktavia Maharani
Published: November 2024

The aim of this research is to develop interactive learning media based on the Canva application for the topic of norms and customs at fourth grade of elementary school. The study applied the ADDIE research and development model, which consists of five development steps: analysis, design, development, implementation, and evaluation. The subjects for the trial were 31student of fourth-grade from SD Negeri 72 Palembang. The research results in the development of interactive learning media based on the Canva application which is valid, practical, and effective. The validation percentage was 88%, the practicality percentage based on student responses was 89%, and the effectiveness percentage was 93%, indicating that the media is highly suitable to be used.
PENGARUH DIGITAL SCRAPBOOK BERBASIS KEARIFAN LOKAL TERHADAP LITERASI BUDAYA SISWA KELAS IV SD N 69 PALEMBANG
Authors: Syalsyabilah Puji , Murjainah Murjainah , Suriadi Aan
Published: November 2024

This study aims to determine the effect of a digital scrapbook based on local wisdom on the cultural literacy of fourth-grade students at SD N 69 Palembang. The research method used is a quantitative true-experimental design with a post-test only control group. The population of this study consists of fourth-grade students at SD N 69 Palembang, with class IVA serving as the control group and class IVB as the experimental group. The results of the normality test with a significance level of â‰¥ 0.05 indicate that the experimental class achieved a result of 0.200 â‰¥ 0.05, and the control class also received a result of 0.200 â‰¥ 0.05, with an average score of 65.3 for the control class and an average score of 85.12 for the experimental class. Based on the results of the independent sample t-test conducted using SPSS, the significance (sig.) value is 0.000 with a significance level of Î± = 0.05. Therefore, it can be stated that sig. 0.000 < 0.05, or the calculated value â‰¥ ttable= 5.128 â‰¥ 1.690. Based on the decision criteria, H0 is rejected and Ha is accepted, thus proving that the digital scrapbook based on local wisdom has an impact on the cultural literacy of students.
PENGARUH MODEL PEMBELAJARAN INKUIRI TERHADAP HASIL BELAJAR MATERI ORGAN PENCERNAAN MAKANAN MANUSIA SISWA KELAS V SEKOLAH DASAR
Authors: Utami Petrisia Salsha Dyah Putri , Hakim Lukman , Lefudin Lefudin
Published: November 2024

This study aims to determine the effect of the inquiry learning model on students' learning outcomes at SD Negeri 223 Palembang. The research applied an experimental design using a Nonequivalent Control Group Design. The population of this study consists of all fifth-grade students at SD Negeri 223 Palembang, the research samples are classes VA and VB. The instrument used is a multiple-choice test. The data analysis techniques employed include normality tests, homogeneity tests, and hypothesis testing. The results show that: (1) the average pretest score of the experimental class was 44.44, and the average posttest score was 69.13. In contrast, the average pretest score of the control class was 51.76, and the average posttest score was 64.77. (2) Based on the t-test results, the calculated value ttest is 46.58 and the table value ttable is 1.701, indicating that 46.58 > 1.701, which leads to the rejection of H0 and acceptance of Ha. Therefore, it can be concluded that the inquiry learning model has a significant effect on students' learning outcomes.
PENGEMBANGAN MEDIA POWERPOINT INTERAKTIF PADA MATERI BILANGAN DESIMAL DAN BILANGAN BULAT KELAS V SDN SENDANGGUWO 02
Authors: Shalsabila Rizka , Sary Ryky Mandar , Rahmawati Intan
Published: November 2024

The research aims to develop PowerPoint media for teaching decimal and whole numbers to fifth-grade elementary school students. This study is a development research utilizing the ADDIE model, which consists of five stages: analysis, design, development, implementation, and evaluation. The research was conducted at grade V in SD Negeri Sendangguwo 02 Semarang. Data collection tools included validation sheets and student questionnaires, with the analysis technique employing descriptive statistical analysis. The subjects of the study were fifth-grade students at SD Negeri Sendangguwo 02. The data obtained were qualitative and then converted into quantitative data. The results of the study indicate that the developed media is highly feasible, with validation percentages of 94.4% from media experts, 93% from content experts, 87.5% from practitioners, and 95.8% from student responses.
PERAN GURU PADA PROGRAM GREEN SCHOOL UNTUK MENGUATKAN KARAKTER PEDULI LINGKUNGAN PADA PESERTA DIDIK DI SEKOLAH ADIWIYATA NASIONAL SD YPWKS V
Authors: Sari Nadila Hepta , Andriana Encep , Hendracipta Nana
Published: November 2024

The aims of this study were to determine the design of the green school program, the implementation of the green school program, teachers' understanding of the green school program, and the role of teachers in the green school program in strengthening the character of caring for the environment at SD YPWKS V. This study apllied qualitative descriptive. The subjects of this study were the principal, class teachers, and students at SD YPWKS V. Data collection techniques used were interviews, observations, and documentation. Data obtained qualitatively showed that the role of teachers in designing the program was to identify environmental problems at schools and determine specific needs must be addressed through the green school program, actively participate in formulating ideas and concepts and designing the curriculum. In the implementation of the green school program, most residents at SD YPWKS V have implemented the green school program during teaching and learning activities and activities outside the classroom and have applied it in everyday life. In addition, teachers at SD YPWKS V already understand the concept of green school so that teachers can understand the indicators of students who already have environmental awareness. The role of teachers in the formation of environmentally awareness characters is that teachers become facilitators for students to provide understanding to students, direct and guide them, and provide concrete examples so that students at YPWKS Elementary School already have environmentally awareness characters.
RESPON PESERTA DIDIK KELAS V SEKOLAH DASAR TERHADAP PENGEMBANGAN LKPD PENDIDIKAN KONSERVASI TOPIK FAUNA PADA MATA PELAJARAN IPAS
Authors: Apriliani Dina , Andriana Encep , Hendracipta Nana
Published: November 2024

Student Worksheets (LKPD) are an important aspect in implementing learning. This study aims to determine students' responses related to the development of LKPD in conservation education learning with the topic of fauna in Ujung Kulon National Park in the subject of science at grade V of elementary school. The study was conducted at SDN Kota Baru with the research subjects were 27 grade V students. The type of research used is descriptive research. Based on the results of the student response questionnaire on the aspect of interest, the percentage score was 93%, the percentage of the material aspect was 91%, the percentage of the linguistic aspect was 90% and the aspect of benefits was 94%. Therefore, the average percentage score was 92% with the category "Very Good". Thus, students gave a very good response to LKPD in the subject of science.
PENGARUH MODEL PROJECT BASED LEARNING DENGAN MEMANFAATKAN LIMBAH PLASTIK UNTUK MENINGKATKAN KREATIVITAS SISWA KELAS V SEKOLAH DASAR
Authors: Lestari Eva Ari , Fardani Much Arsyad , Fajrie Nur
Published: November 2024

Hasil pengamatan diketahui bahwa siswa kurang aktif ketika pembelajaran mengakibatkan tingkat kreativitasnya dikategorikan masih rendah. ketika pembelajaran guru masih menggunakan metode ceramah hendaknya guru menggunakan model pembelajaran yang cocok. Penelitian ini bertujuan untuk mengetahui hasil dari pengaruh model pembelajaran Project Based Learning dengan memanfaatkan limbah plastik untuk meningkatkan kreativitas siswa kelas V SD. Penelitian ini menggunakan metode kuantitatif jenis pre eksperimental dengan one grup pretest posttest. Teknik pengumpulan data meliputi angket, wawancara, observasi, dokumentasi. Populasi pada penelitian ini meliputi seluruh siswa kelas V SD 3 Padurenan dengan jumlah 14 siswa. Nilai rata-rata pretest 74,99 dan nilai rata-rata posttest 85,23 mengalami kenaikan sebesar 10,24. Hasil Uji Paired Sample T-Test memperoleh hasil signifikasi 0.00 < 0,05. Hasil uji N-Gain memperoleh hasil 0,41 termasuk kategori sedang. Adapun hasil dari penelitian ini yaitu tedapat peningkatan kreativitas yang signifikan antara sebelum dan setelah menggunakan model Project Based Learning. Kesimpulannya adalah penerapan model Project Based Learning dengan memanfaatkan limbah plastik berpengaruh untuk meningkatkan kreativitas siswa kelas V SD.
PENERAPAN MODEL PEMBELAJARAN ASSURE TERHADAP KEMAMPUAN LITERASI MATEMATIS PADA PESERTA DIDIK KELAS V SEKOLAH DASAR
Authors: Nurhalisza Nurhalisza , Yuhana Yuyu , Alamsyah Trian Pamungkas
Published: November 2024

This research aims to find out whether the Mathematical Literacy of students who receive learning using the Assure model is better than those who receive learning using the Problem Based Learning model. This research is a quasi-experimental research with the subjects of this research being students in classes 5A and 5B at SDN Anyar 2 with 27 students in each class. This research uses test instruments to measure students' mathematical literacy and non-test instruments using interviews and observations. This research data analysis technique uses descriptive statistics on the Pretest and Posttest. The research results showed that in the pretest, experimental class students got an average of 50.4 and the control class 49.12 and there was almost no difference in initial ability. Posttest results showed that the experimental class was superior with an average score of 78 and the control class 63.85. This shows that the mathematical literacy skills of experimental class students who were given the Assure model improved better than students who were given the Problem Based Learning model.
EKSPLORASI KEMAMPUAN PESERTA DIDIK SEKOLAH DASAR DALAM MENULIS CERITA PENDEK MENGGUNAKAN MODEL PEMBELAJARAN PROBLEM-CENTERED LEARNING (PCL)
Authors: Ayu Yuni Faska , Kuntarto Eko , Noviyanti Silvina
Published: November 2024

This study aims to identify students' ability in writing short stories after participating in learning with the Problem-Centered Learning (PCL) model, as well as to analyze the difficulties they face and the obstacles faced by teachers in implementing PCL. This study applied a qualitative case study approach at SDN 112/IX Muhajirin, involving 17 students  of fourth grade and one teacher. Data were collected through observation, assessment of student writing content, and interviews, then analyzed descriptively and thematically. The results showed that PCL had a positive impact on improving students' ability in writing short stories by developing clear themes, deep characters, and effective storylines. However, students faced difficulties in developing the author's background and adapting the language style. Teachers also faced challenges in technical readiness and institutional support. Based on these findings, it can be concluded that PCL is effective in improving elementary school students' short story writing skills despite facing implementation challenges. The need of additional support for the development of teaching strategies and in-depth training for teachers to overcome these difficulties is emphasized.