bluuebunny/crossref_metadata_2025_split huggingface dataset:
ANALISIS KENDALA PEMBELAJARAN MATEMATIKA SECARA DARING DITINJAU DARI TEORI KONSTRUKTIVISME
Authors: Supinah Roslani , Nuriadin Ishaq 
Published: September 2023

AbstractConstructivism learning theory is very relevant to be applied in Indonesia because it has advantages that can be used as an innovative learning method. However, the constructivism learning model is still rarely applied, especially in mathematics learning so that the learning objectives are not achieved properly. This research was conducted to obtain comprehensive information on how constructivism theory is used in online mathematics learning and the obstacles faced. This can be useful to find out good new adaptations in implementing online mathematics learning in the future. In addition, it can be useful as an evaluation material for the application of constructivism theory in online mathematics learning in the future. This research uses descriptive analysis method with literature study technique. The constructivism theory referred to in this study is a constructivist learning theory that has been explored in the application of online mathematics learning into four parts, namely: a learner-centered learning environment, a knowledge-centered learning environment, an assessment-centered learning environment, and an assessment-centered learning environment. community-centred learning.Keywords: constructivism, learning mathematics, daring AbstrakTeori belajar konstruktivisme sangat relevan diterapkan dalam pembelajaran di Indonesia karena mempunyai keunggulan yang dapat digunakan sebagai metode belajar yang inovatif. Akan tetapi model pembelajaran konstruktivisme masih jarang diterapkan khususnya pada pembelajaran matematika sehingga tujuan pembelajaran tidak tercapai dengan baik. Penelitian ini dilakukan untuk mendapatkan informasi yang komprehensif bagaimana teori konstruktivisme digunakan dalam pembelajaran matematika secara daring dan kendala yang dihadapi. Hal ini dapat bermanfaat untuk mengetahui adaptasi baru yang baik dalam menerapkan pembelajaran matematika secara daring pada waktu yang akan datang. Selain itu dapat bermanfaat sebagai bahan evaluasi penerapan teori konstruktivisme pada pembelajaran matematika secara daring di masa yang akan datang. Penelitian ini menggunakan metode analisis deskriptif dengan teknik studi kepustakaan. Teori konstruktivisme yang dimaksud pada penelitian ini adalah teori belajar konstruktivisme yang telah dieksplorasi dalam aplikasi pembelajaran matematika secara daring ke dalam empat bagian yaitu : lingkungan belajar yang berpusat pada peserta didik, lingkungan belajar yang berpusat pada pengetahuan, lingkungan belajar yang berpusat pada penilaian, dan lingkungan belajar yang berpusat pada komunitas.Kata kunci: Konstruktivisme, pembelajaran matematika, daring
MODEL PEMBELAJARAN KADIR (KONEKSI, APLIKASI, DISKURSUS, IMPROVISASI, REFLEKSI) BERBANTUAN PHET SIMULATION : DAMPAK TERHADAP KEMAMPUAN BERPIKIR KRITIS MATEMATIS PESERTA DIDIK
Authors: Oktavia Yovi , Kadir Kadir , Farida Farida , Andriani Siska 
Published: September 2023

Tujuan penelitian ini adalah untuk menemukan dampak model pembelajaran KADIR berbantuan PhET Simulation terhadap kemampuan berpikir kritis matematis. Penelitian dilaksanakan di suatu SMA Negeri di Bandar Lampung. Penelitian ini adalah kuasi eksperimen dengan sampel 4 kelas X MIPA, melibatkan 144 peserta didik. Sampel ditentukan menggunakan teknik cluster random sampling. Pengumpulan data menggunakan tes, dan dianalisis dengan ANOVA satu jalan. Hasil penelitian mengungkapkan bahwa rata-rata kemampuan berpikir kritis matematis peserta didik yang diajar dengan model pembelajaran KADIR berbantuan PhET Simulation (80,64) lebih tinggi daripada model Discovery Learning berbantuan PhET Simulation(63,33) model KADIR (62,67) dan model Discovery Learning (58,78). Model pembelajaran KADIR berbantuan PhET Simulation berpengaruh terhadap kemampuan berpikir kritis matematis peserta didik (F = 37,68; p-value = 0,000; n2 = 0,81). Kesimpulan penelitian ini adalah bahwa dengan mengintegrasikan PhET Simulation pada model pembelajaran KADIR ternyata efektif atau berdampak terhadap peningkatan kemampuan berpikir matematis peserta didik. Oleh karena itu disarankan untuk menggunakan model pembelajaran KADIR berbantuan PhET Simulation dengan lebih mengaktifkan siswa-guru pada tahap koneksi, aplikasi, diskursus, improvisasi, dan refleksi.
Structural-functional changes in the proventriculus of poultry infected with transmissive viral proventriculitis
Authors: Kotsyumbas G. I. , Zhyla M. I. , Tyshkivska A. M. , Kalinina O. S. , Khmil E. P. , Shkil M. I. , Mysiv O. V. , Tyshkivsky M. Y. 
Published: September 2023

Transmissive viral proventriculitis (TVP) is a new avian disease, the etiology and pathogenesis and diagnostics of which remain unidentified, being therefore a subject of an active ongoing discussion among researchers and veterinary doctors. Cases of the disease have been reported and registered in many countries of the world. On poultry farms of Ukraine, this disease started to be diagnosed in 2019, according to the characteristic pathognomic changes. The article presents the results of pathoanatomical, histological and electronic-microscopical studies of the glandular part of the stomach of 62 ill broiler chickens aged 24-28 days and 7 clinical healthy broiler chickens of the same age. The samples of the proventriculus from the infected and clinically healthy chickens were fixated in 10% aqueous solution of neutral formalin and in 1.5% solution of glutaraldehyde in 0.2 molar cacodylate buffer (рН 7.2). Pathoanatomic necropsy of the infected broiler chickens revealed overall anemia, decrease in the volume of the spleen, thymus and fecal sac. In the glandular part of the stomach, the wall was slightly thickened, non-homogenously stained on the section, the mucous membrane being swollen, covered by dense whitish mucous. According to the histological study, the proventriculus of the broiler chickens had lymphocytic necrotizing proventriculitis. In the tubular-alveolar structures of the mucous membrane, there prevailed alteration of the secretory epithelium, with its transformation into ductal epithelium, combined with lymphocytic infiltration of the interstitium. Intensive necrosis of most glandular (oxynticopeptic) cells was accompanied by their exfoliation from the basal membrane of the secretory parts, with desquamated cells accumulating in enlarged lumens of alveoli and excretory ducts. Further, necrotized oxynticopeptic cells in the tubular-alveolar glands were actively replaced by cylindrical ductal cells, and also their hyperplasia and hypertrophy occurred. Diffusive and multifocal interalveolar round-cell infiltrates were mostly presented by lymphocytes, among which there occurred plasmocytes, macrophages, and heterophils. Ultrastructural studies of secretory cells revealed presence of pathogen virions in nucleus and cytoplasm. Based on the morphological changes in the birds’ proventriculus, we diagnosed transmissive viral proventriculitis, which had not been recorded in Ukraine before.
Influence of autological growth factors on activation of regenerative processes of the superficial digital flexor tendon of horses
Authors: Malyuk M. O. , Brusko E. P. , Hnapovska Y. O. , Tkachenko V. V. , Tarnavskiy D. V. , Tkachenko Т. A. 
Published: September 2023

Injury of the superficial digital flexor tendon is known for slow and functionally incomplete recovery, which is a problem in the equestrian horse farming. In the clinical studies, we used platelet-rich plasma, obtained from horse blood, and a specially designed scheme of rehabilitation after physical loads for the treatment of injuries of the superficial digital flexor tendon of horses. We analyzed four clinical cases of injuries of the superficial digital flexor of horses, of which 3 cases were treated using platelet-rich plasma, injected under ultrasound-diagnostic control, and one case that was treated without its administration. Ultrasound studies of the superficial digital flexor tendon revealed the following changes: increase in the volume of the tendon, damage to the fiber structure, and absence of fibrosity on the longitudinal images, and hypo-echogenic or anechogenic structure on transverse and longitudinal images. The results of the platelet-rich-plasma treatment of the horses were compared with the control (without utilization of platelet-rich plasma). As seen on the ultrasound images during the intermediate-control stage (2.5–4.0 months after injury), the horses that had received injection of platelet-rich plasma and had undergone the complex of physical exercises were forming new fibers of the superficial digital flexor tendon, which had distinct structure and alignment. This indicated the process of their physiological development. Four and a half months after being injured, the horse that had only received a symptomatic treatment combined with a complex of rehabilitating physical loads had poorly structured fibers in the damaged area, with their disordered alignment, as revealed by the longitudinal images. This suggested the formation of a scar. Transverse images showed the anechogenic areas of the injury suffered by this horse. The method of preparing and administration of platelet-rich plasma is relatively cheap, given the equipment and a qualification of a veterinary doctor. Taking into account its identified efficacy for recovery of the superficial digital flexor tendon, it would be promising to conduct further clinical trials using platelet-rich plasma for treating other injured tendons of horses, which can notably increase the quality of recovered connective tissues.
Peculiarities of the development of reproductive organs of ornamental crabapples (Malus spp.) depending on drought resistance
Authors: Konopelko A. V. , Opalko O. A. , Balabak O. A. , Opalko A. I. 
Published: September 2023

The current task for both pomiculture and ornamental horticulture is the formation of plant cultivars resistant to different environmental stress and maintaining their high productivity. Drought is one of the most significant environmental factors that inhibit plant growth and development and cause a set of morphological, physiological, and biochemical changes in plant organisms. The aim of our research was to discover the relationship between the development of the reproductive organs of ornamental crabapples and the physiological indicators determined by drought stress factors. The four species and three cultivars of the ornamental crabapples (Malus spp.) from the collection of the National Dendrological Park “Sofiyivka” of NAS of Ukraine were involved in the study: M. × floribunda Siebold ex Van Houtte, M. halliana Koehne, M. niedzwetzkyana Dieck, M. × purpurea (A. Barbier) Rehder, M. × purpurea ‘Ola’, M. × purpurea ‘Royalty’, and M. × purpurea ‘Selkirk’. Drought resistance was determined by the following quantitative indicators: leaf water content, relative turgidity, leaf water deficit, and excised leaf water retention capacity. The leaf water content ranged from 60.0% (M. × floribunda) to 67.2% (M. × purpurea), the relative turgidity ranged from 81.7% (M. × purpurea ‘Ola’) to 98.9% (M. halliana), and the leaf water deficit ranged from 6.8% (M. halliana) to 24.4% (of M. niedzwetzkyana). As a result, the leaves of M. halliana lost the smallest amount of water in 24 hours (50.2%), whereas M. × purpurea 'Ola' leaves lost the largest amount (77.4%). The development of the reproductive organs was estimated based on the fertility and viability of pollen grains, percentage of fruit and seed set. Pollen fertility ranged from 79.8% (of M. niedzwetzkyana) to 95.0% (M. × purpurea 'Ola'); its viability varied from 5.1% (M. niedzwetzkyana) to 51.5% (M. × floribunda). The highest fruit set percentages were recorded in M. floribunda (80.5%), while the lowest was in M. × purpurea 'Royalty' (16.4%). The average percentage of seed sets was 48.5%. The development of the reproductive organs of Malus specimens depended on their drought resistance. The fruit and seed set percentages had a strong negative correlation with the water deficit in leaves determined during the period of drought stress. The percentage of fruit set was also strongly correlated with relative turgidity. The leaf water deficit and relative turgidity were the most important physiological indicators in the drought resistance study, taking into account the need to maintain crop yield and the decorative effect of Malus plants.
Age features of the microscopic structure of the intestines of the budgerigar (Melopsittacus undulatus)
Authors: Kushch М. М. , Lavrova I. Y. , Fesenko І. А. , Miroshnikova О. S. , Liakhovich L. М. , Kushch L. L. , Byrka О. V. 
Published: September 2023

Information about the morphology of the budgerigar intestines is a necessary condition for the preparation of diets for feeding, prevention and treatment of diseases of the digestive system, the state of which determines the intensity of growth and development of the bird’s body. The features of the histological structure of the intestines of the budgerigar (Melopsittacus undulatus) of 9 ages: 1, 3, 7, 14, 21, 30, 60, 180 and 365 days of age were studied. Histological preparations were made according to the classical method with hematoxylin and eosin staining of sections, according to Mallory and Grimelius. Morphometric parameters of microstructures were determined on preparations from a transverse section of the middle section of the duodenum, jejunum, ileum and rectum. In the intestinal wall of the budgerigar, three membranes were identified: mucous, muscular and serous. Three layers were found in the mucosa: epithelial, lamina propria, and muscular lamina. The predominant type of epitheliocytes were rim enterocytes, goblet cells were found in a smaller number, the number of which increased towards the rectum, as well as enteroendocrine cells, which were located mainly in the crypts. The muscularis mucosa consists of several layers of cells of smooth muscle tissue, which delimits the lamina propria from the muscle membrane, encircles the crypts, and accompanies the blood capillaries of the villi. The submucosa was not found. The muscular coat consists of two layers formed by smooth muscle tissue: the inner circular and the outer longitudinal. The enteric nervous system is represented by two nerve plexuses: the submucosal, located between the muscularis mucosa, and the myenteric, located in the outer layer of the muscular membrane. There was a general pattern of increase in changes in most parameters with age : the diameter of the intestine, wall thickness, mucous membrane and muscle membrane, height, width and surface area of the villi, the depth of the crypts. Changes in the size of the microstructures of the intestines were asynchronous. The most intensive changes in the size of microstructures occurred in the first month after hatching, especially in the first week. They corresponded to the values of an adult bird mainly at 21–30 days of age. A decrease in the thickness of the wall, mucosa, height of the villi, and their surface area in the direction from the duodenum to the rectum was established.
The influence of genotype and feeding level of gilts on their further reproductive performance
Authors: Zhukorskyi О. М. , Tsereniuk О. М. , Sukhno T. V. , Saienko A. M. , Polishchuk A. A. , Chereuta Y. V. , Shaferivskyi B. S. , Vashchenko P. А. 
Published: September 2023

Since the efficiency of pig breeding largely depends on the reproductive ability of sows, one of the promising areas of research in animal husbandry is the study of factors whose correction can improve the fertility and quality of the offspring. Our work purpose was to investigate the effect of gilts’ feeding level, MC4R genotype and interaction of these factors on the reproductive traits pigs after reaching puberty. The object of the study was crossbred pigs obtained as a result of the combination of sows of the Large White breed with boars of the Landrace breed. To carry out the research, the animals were divided into four groups that differed among themselves by the genotype of the melanocortin 4 receptor gene and the level of feeding of the experimental animals. To determine the genotype, the PCR-RFLP method was utilized. Genetic studies were conducted in a certified laboratory of the Institute of Pig Breeding and Agroindustrial Production. The reproductive capacity of the pigs was determined after receiving the farrowing by the following traits: piglets born alive per farrowing (animals), weight of litters of piglets at birth (kg), average weight of piglet at birth (kg), number of weaning piglets (animals), weight of litters of piglets at 28 days (kg), average weight of piglet at 28 days (kg), average daily gain of suckling piglets from 0 to 28 days (g). It was established that the traits of reproductive ability of crossbred Large White × Landrace pigs were affected by the interaction of genotype and feeding factors. When limiting the nutritional value of the daily diet, sows with the AG genotype outperformed those with the GG genotype by 1.2 piglets born alive per farrowing, by 3.0 kg for litter weight at birth, and by 0.1 kg for the average weight of a piglet at birth. The advantage of the AG genotype for average piglet weight at 28 days was even larger. Conversely, in conditions of a high level of feeding, animals with the GG genotype had higher productivity in terms of such traits as piglets born alive per farrowing – by 1.6 animals; weight of litters of piglets at birth – by 4.1 kg; for average weight of piglet at birth – 0.2 kg; by number of weaning piglets – 2.0 animals; by weight of litters of piglets at 28 days – 28.8 kg; for average weight of piglet at 28 days – 1.1 kg and for average daily gain from 0 to 28 days – 34.6 g. In the future, the goal is to develop a system of differentiated rationing of pigs' diets depending on their genotype.
EXPRESS 3D GEOMECHANICAL MODELING FOR INPUT TO HYDRAULIC FRACTURING ON CARBONATE OILFIELDS OF BASHKORTOSTAN REPUBLIC
Authors: Arzhantsev V.S. , Lobova E.Yu. , Drebushchak M.V. , Zhanadelova G.B. , Mitrofanova E.K. , Vishnevskii P.A. 
Published: September 2023

The work describes a method of real-time 3D modeling of mechanical properties over the entire field area for the purposes of hydraulic fracturing. The uniqueness of this modeling approach is associated with the prompt acquisition of mechanical properties along the well paths of the field, which is especially important in conditions of insufficient geomechanics data.
Traditional three-dimensional geomechanical modeling is a time-consuming and resource-intensive process. The data often describe the mechanical properties and stress-strain state of the rocks within the current drilling or development sector of the field and do not take into account the interwell space, especially in poorly drilled areas of the field. The method of real-time 3D geomechanical modeling makes it possible to quantify values of minimum horizontal stress used in hydraulic fracturing simulators, as well as static and dynamic Young's modulus and Poisson's ratio over the entire field area using the optimal amount of resources and in a shorter time.
Based on the built three-dimensional cubes of elastic properties and stresses, correct data were obtained in the inter-well space, their vertical and lateral changes were analyzed, and frac design data were obtained at any well drilled through the simulated targets of the field.
This paper covers the Arlanskoye, Znamenskoye and Yugomashevskoye fields (Bashneft PJSC). The target targets are carbonate deposits: Kashira and Podolsk strata of the Arlanskoye field, Tournaisian strata of the Znamensky field and Bashkir-Vereisky strata of the Yugomashevsky field.
For the carbonate rocks of the target targets, laboratory core studies were carried out to determine elastic properties, and stable regional core-core relationships were obtained in the intervals of lower and middle Carboniferous carbonate deposits.
1D geomechanical models were built in RN-SIGMA software 84 wells at the intervals of the study targets. In current 3D geological models are introduced and distributed values of Young's modulus, Poisson's coefficient and minimum horizontal stress gradient is calculated. Analysis of changes in geomechanical properties by area, for each study object was carried out and data were obtained to create frac designs for 15,000 wells.
Libros y revista.
Authors: Gómez Cifuentes Dora Nicolasa 
Published: September 2023

Se reseñan los libros:Fundamentos de alimentación saludable.Anorexia: los factores socioculturales de riesgo.Diabetes mellitus e hipertensión arterial: aspectos médicos y nutricionales.Técnicas para la toma de medidas antropométricas.Nutrición terapéutica del adulto. También se reseña la revista Nutrición y vida activa: del conocimiento a la acción.
La dieta mediterránea y la prevención de enfermedades crónicas
Authors: Deossa Restrepo Gloria Cecilia , López Restrepo Catalina María 
Published: September 2023

Existe evidencia científica que confirma la relación entre los diferentes componentes de la dieta mediterránea y la prevención de enfermedades crónicas no trasmisibles, como es el caso de la obesidad, la diabetes mellitus tipo 2, la dislipidemia, las enfermedades cardio-vasculares, el cáncer y aunque faltan más estudios, también se ha encontrado asociación con la prevención de la artritis reumatoidea. Se ha sugerido que este estilo de alimentación tradicional del mediterráneo sea adoptado como un todo y no cada componente por separado, no obstante, se deben hacer modificaciones en el estilo de vida, al igual que en el entorno, para mejorar las condiciones de salud de una población y prevenir la incidencia de las enfermedades crónicas que tienen su origen principalmente, en unos hábitos de alimentación inadecuados. Entre las sustancias nutritivas y no nutritivas que ofrece esta dieta y que tienen una relación directa con el mantenimiento de la salud se destacan: Los ácidos grasos monoinsaturados, que se encuentran en el aceite de oliva y en frutos secos como las nueces; los polifenoles y el resveratrol, antioxidantes que están presentes en el vino rojo; la fibra soluble e insoluble, la cual hace parte de las frutas, de las verduras y de los cereales integrales, al igual que los ácidos grasos omega 3 presentes en el pescado y también en las nueces.
Ecuaciones para predecir la estatura en adultos cubanos
Authors: Díaz Sánchez María Elena , Monterrey Gutiérrez Pedro , Toledo Borrero Emilia María , Wong Ordóñez Iraida , Moreno López Vilma 
Published: September 2023

Una de las dimensiones físicas más afectada durante el ciclo de vida es la estatura, cuyas cifras de reducción se incrementan con la edad y varían según el sexo, el grupo racial o el tipo de estudio. Estos aspectos son importantes si se necesita conocer la talla en sujetos de condiciones especiales y durante el proceso de envejecimiento, con el fin de evaluar su estado nutricional. Se realizó un estudio transversal en 1499 individuos para construir ecuaciones de predicción de la estatura a partir de diferentes proporciones corporales en hombres y mujeres, separados en tres estratos: jóvenes, de mediana edad y ancianos. Se realizaron las mediciones del peso, estatura, braza, hemibrazas, longitud hombrocodo y altura de la rodilla. Se obtuvieron las ecuaciones de mejor ajuste para la predicción de la estatura en cada subgrupo; la aplicación de éstas en el cálculo del índice de masa corporal aumentó la validez de la evaluación del estado nutricional en adultos con limitaciones físico-motoras o de la tercera edad. Los resultados permiten considerar con eficiencia varias medidas sustitutas (braza, hemibraza derecha, hemibraza izquierda y la combinación de la altura de la rodilla con la longitud del brazo) aplicables para diferentes circunstancias a personas donde no sea posible o recomendable obtener directamente la talla y se requiera una valoración de su estado físico con fines de salud u otros propósitos.