bluuebunny/crossref_metadata_2025 huggingface dataset:
PROBABILISTIC-PHYSICAL MODEL OF GAN:SI RADIATION RECOMBINATION SPECTRA LONG-TERM EVOLUTION DUE TO MICROWAVE RADIATION, WEAK MAGNETIC FIELD AND ELECTRON RADIATION TREATMENTS
Authors: Roman Redko, Grigorii Milenin Roman Redko, Grigorii Milenin , Svitlana Redko Svitlana Redko
Published: May 2023

The influence of microwave radiation (MR) (2.45 GHz), weak magnetic field (WMF) (60 mT) and electron radiation (ER) (4 MeV) treatments on processes of defects reorganization in near-surface layers of GaN:Si have been studied. Long-term processes of photoluminescence spectra transformations after MR, WMF and ER treatments have been modeled. Our approximation assumes that evolution processes in the defect subsystem of a crystal are random events, and distribution of the random value – the time before a random event – is a subject to the Weibull-Gnedenko law. Qualitative and quantitative agreements between experimental data and theoretical models of long-term observed changes caused by noted treatments have been obtained. According to the proposed approach, the same mechanism could be applied for explanation long-term reorganizations after noted treatments semiconductor material. Moreover, this approach enables to explain non-monotonous behavior of photoluminescence spectra after MF, WMF and ER treatments and could be applied to prediction the consequences of noted actions.
Keywords: Microwave radiation, weak magnetic field, electron radiation, photoluminescence, gallium nitride.
A CONTRIBUTION TO THE STUDY OF THE ASPECTUAL GRAMMATICALIZATION IN A COMPARATIVE ENGLISH-BULGARIAN PERSPECTIVE
Authors: Venkova Tzvetomira
Published: May 2023

(Братанова, Боряна. Английските фразеологични глаголи и българските префигирани глаголи ‒ граматикализация и аспектуалност. Велико Търново: Университетско издателство „Св. св. Кирил и Методий“, 2020, 389 стр., ISBN: 978-619-208-233-8)

Сред интересните нови езиковедски заглавия е книгата на Боряна Братанова Английските фразеологични глаголи и българските префигирани глаголи ‒ граматикализация и аспектуалност. Това е новаторско изследване, разглеждащо проблемите на граматикализацията като основен механизъм за конструиране на граматическата система в езика.
Social and built environment interventions to prevent alcohol, tobacco, and legal cannabis use: a scoping review
Authors:   Instituto Nacional de Salud Pública, Sánchez-Pájaro Andrés , Barrientos-Gutiérrez Tonatiuh , Pérez-Ferrer Carolina
Published: May 2023

Eligibility criteria: We will use the following inclusion criteria: 1) Document must mention by name or describe at least one intervention, strategy, program or policy to prevent alcohol, tobacco and legal cannabis use. 2) Document must contain enough information for the researchers to determine if the intervention, strategy, program or policy was aimed at modifying the social and/or built environment. 3) Intervention, strategy, program or policy must have been aimed at modifying the social and/or built environment, using the following definitions: Social environment: “…the immediate physical surroundings, social relationships, and cultural milieus within which defined groups of people function and interact…Social environments can be experienced at multiple scales, often simultaneously, including households, kin networks, neighborhoods, towns and cities, and regions…”; Built environment: “the surroundings or conditions designed and built through human intervention, where a person lives or operates”. 4) Document must mention that intervention/strategy/program/policy has been implemented within the last 30 years (1992-2022), whatever the setting, time frame, or subpopulation. 5) Document must be within the body of scientific literature (peer-reviewed articles, research journal commentaries, editorials, or perspective pieces), be a published book or book chapter, a government, multinational organization or non-profit organization report, or a dissertation/thesis. 6) Document must not be a conference abstract, public letter, speech transcript, budget report, independent website post or blog, or news article. 7) Document must be in English or Spanish. 8) Document must be open-source, publicly available online, or accessible through the INSP’s library services.
Plataforma (SINAÍ) en procesos pedagógicos para las competencias laborales de docentes: Tendencias Educativas
Authors: Montiel Hernández Doris Ester
Published: May 2023

Sistematizar los procesos administrativos y pedagógicos a nivel institucional, para lograr más eficiencia y calidad del servicio de gestión administrativa y pedagógica de las instituciones es fundamental en las Instituciones. Se debe considerar que no se han desarrollado de manera adecuada las funciones que se pueden desarrollar en la plataforma SINAÍ, por parte de los directivos y docente de estas instituciones, donde se siguen llevando procesos aislados y de manera física, por lo tanto, no se ha llegado a la materialización del propósito para lo cual fue adquirido dicho recurso tecnológico. Por esta razón, se estableció como objetivo de este artículo evaluar la incidencia de la implementación, apropiación y evaluación de la plataforma Sinaí para potencializar las competencias laborales de los docentes. Para lo concerniente a los aspectos metodológicos del desarrollo de este artículo se definió un tipo de investigación cualitativo, fundamentado en el modelo epistémico interpretativo, con un método de investigación hermenéutico desde un diseño de campo. Se concluyó que, la competencia del docente se refiere a la capacidad de un maestro para poner en práctica todas las áreas de conocimiento que tiene para involucrar a los estudiantes en lo que están aprendiendo y cómo están aprendiendo. De la misma manera, los procesos pedagógicos son el conjunto de prácticas, relaciones intersubjetivas y saberes que acontecen entre los que participan en procesos educativos, escolarizados y no escolarizados, en aras de construir conocimientos, clarificar valores y desarrollar competencias para la vida en común.
Resiliencia en la gestión de riesgo para afrontar la vulnerabilidad en Tabasco
Authors: Hernández Castillo María Guadalupe , Pérez Alvarado Javier Antonio , Cruz Hernández Luis Enrique , Reyes Chablé Maritza , López De La Cruz Filogonio
Published: May 2023

La vulnerabilidad se refiere a las características y las circunstancias de una comunidad, sistema o bien que los hacen susceptibles a los efectos dañinos de una amenaza (UNISDR, 2009). Esto afecta principalmente infraestructura, bienes y servicios esenciales o ya sea medios de sustento a gran escala o dimensión alta que supere la capacidad normal de un lugar o espacio para enfrentarse sin alguna ayuda. El objetivo de este documento es hacer una revisión documental sobre el panorama de riesgo y vulnerabilidad ante fenómenos naturales en el Estado de Tabasco, reflexionar acerca de la importancia y el reconocimiento de la Gestión Integral de Riesgo como herramienta para el Desarrollo Sostenible y la transformación social de condiciones generadoras de riesgo, que permite intervenir para evitarlos, reducirlos, así como de responder a sus efectos. Mediante una investigación documental se elaboró la búsqueda de información a través de la combinación de diversas palabras en bases de datos especializadas. Ante la emergente situación, es urgente hacer un estudio a profundidad que evalúe las condiciones de riesgo. Se considera importante trabajar en el foque de la gestión de riesgo desde una perspectiva colaborativa, socialización de los conocimientos y buenas prácticas a partir de los objetivos sustentados por el Marco Político y Normativo para fortalecer a su Institucionalidad, con la finalidad de ajustarse a los fenómenos y procesos generados por la variabilidad de las condiciones Climática. De esta forma estaremos trabajando por la ciudad resiliente ante los desastres, participando con acciones encaminadas al Desarrollo Sostenible.
Assessment of structural changes in the left atrium myocardium according to cardiac magnetic resonance with contrast before and after balloon cryoablation in patients with persistent atrial fibrillation
Authors: Aparina O. P. , Kirilova V. S. , Stukalova O. V. , Maykov E. B.
Published: May 2023

Aim. To study the structural changes of the left atrium myocardium according to magnetic resonance imaging with contrast in patients with persistent atrial fibrillation before and after balloon cryoablation and compare the results with the effectiveness of the intervention.

Material and methods of research. The study included 28 patients with persistent form of atrial fibrillation. All patients before and after magnetic resonance imaging underwent cardiac magnetic resonance imaging with delayed contrast using a high-resolution MR pulse sequence (voxel size 1,25x1,25x1,25 mm) before and after cryoablation.

The severity of atrial fibrous lesion was calculated automatically using a specialized LGE HEART Analyzer program using algorithms based on the myocardial contrast index with a threshold value of 1.38. The clinical efficacy of the intervention was evaluated after 12 months and the relationship was determined structural changes in the myocardium of the left atrium according to contrast magnetic resonance imaging data before and after the cryoablation.

Results. The severity of fibrotic myocardial lesion of the left atrium before balloon cryoablation was 1,5 [0,16; 9,3]%. In Utah patients, stage 1 fibrosis was detected in 71,4% (n=20), stage 2 in 14,3% (n=4), stage 3 in 3,6% (n=1), stage 4 in 10,7% (n=3). 3 months after cryoablation, there was an increase in the severity of fibrosis of 2,7 [1,02; 18,8]% (p<0,001). Overall efficiency of the intervention rate was 57,1%. The construction of Kaplan- Meyer curves demonstrated that the intervention was most effective in patients with minimal severity of fibrosis before ablation (Utah I) and least effective in more pronounced fibrotic lesion (stage Utah III and IV)

Conclusion. Magnetic resonance imaging of the heart with contrast allows to assess fibrotic lesion of the myocardium of left atrial, which may be one of the factors of the effectiveness of interventional treatment of persistent AF.
Prevention of thrombotic complications in patients in the postoperative period of total hip and knee arthroplasty: efficacy and safety
Authors: Ushanova A. M. , Okisheva E. A. , Mironova O. Iu.
Published: May 2023

Thromboembolic complications (TEC) remain a significant problem in modern surgery, worsening the prognosis and reducing the effectiveness of the operation performed. The increase in the number of venous thromboembolisms (VTE) is determined by the severity of the initial injuries, the volume and traumatic nature of the surgical intervention, as well as the increase in the number of elderly patients with multiple comorbidities. Patients in orthopedic departments who have undergone major surgeries such as total hip arthroplasty (THA) or total knee arthroplasty (TKA) are at increased risk of VTE, leading to significant postoperative morbidity and mortality. Thromboses in extensive orthopedic surgery are caused by several prothrombotic mechanisms, such as venous injury, activation of procoagulation factors due to massive bone and tissue damage, and prolonged postoperative immobilization. The most common potential thrombotic complications after arthroplasty are deep vein thrombosis (DVT) of the lower extremities and pulmonary embolism (PE).In the absence of prophylaxis in the postoperative period of major orthopedic surgeries, TECs develop in most patients.

To date, the issue of primary prevention of VTE in orthopedic patients remains relevant, and there is still no consensus on the best way to prevent thrombosis after THA and TKA.

Risk assessment is the first step in preventing death and disability from VTE. Currently, mechanical and pharmacological methods are used for primary prevention in orthopedics, often in combination. Certainly, the use of antithrombotic drugs in the postoperative period is an effective way to prevent thrombosis. When prescribing antithrombotic drugs, it is also important to minimize the risk of bleeding, including in the area of postoperative wounds. Various antithrombotic drugs are used as pharmacological prophylaxis for TEC. The literature on the dosage, duration, efficacy, and safety of their use varies considerably. Our review assessed published literature on the efficacy and safety of antiplatelet agents for VTE prophylaxis.
Organizational and clinical aspects of acute coronary syndrome combined with a new coronavirus infection (SARS-COV-2)
Authors: Serebrennikov I. I. , Kopylov Ph. Yu. , Komarov R. N. , Mukanova M. B. , Ismailbaev A. M. , Gafurov F. S.
Published: May 2023

Objective. Assessment of organizational and clinical aspects of acute coronary syndrome combined with a new coronavirus infection (SARS- CoV-2).

Materials and methods. This is a retrospective study where 60 patients were divided into the following groups: group 1 patients with acute coronary syndrome (ACS) and a new coronavirus infection hospitalized in the «red» zone after infection was detected at the prehospital stage (n=29); group 2 - uninfected coronavirus infection patients with ACS (n=31). The primary points were mortality in the hospital and the average time (up to 2 months) after ACS, the incidence of acute heart failure, the incidence of ACS with ST segment elevation, the frequency of acute coronary artery occlusions.

Results. The analysis of hospital mortality revealed its higher level in the ACS group and COVID-19 (group 1) (p=0.009). Mortality within 2 months was also higher in group 1 (p=0.017). The groups did not differ in the number of patients with ACS and ST segment elevation and acute coronary artery occlusions. Analysis of the incidence of OSN at admission revealed a statistically significant difference (p=0.05) in group 2 (n=12, 38.7%) compared with group 1 (n=5, 17.2%).

Conclusions. Patients with ACS and COVID-19 are characterized by a higher initial severity, a tendency to develop ACS with ST segment elevation, high rates of hospital and 60-day mortality. Separating the flows of infected and uninfected patients makes it possible to improve the epidemiological situation in non-infectious hospitals, however, it leads to a delay in hospitalization of patients with ACS and COVID-19, which potentially increases the risk of fatal complications in this cohort.
Management of Scriptothrip Dorsalis (Thysanoptera; Thripidae) in Chilli Crop
Authors: Pathan Shehnaz , Solangi Abdul Waheed , Marri Jan Muhammad , Khuhro Sajjad Ali , Lanjar Abdul Ghani
Published: May 2023

Chilli crop is drastically damaged by chilli thrip due to cryptic in nature and difficult to monitor the population till damge symptoms become visible. Simultaneously, this noxious pest mainly controlled by the use of chemicals, which lead to several problems. The main purpose of the present research is to monitor, manage and keep thrip population below economic thresh   hold  level (ETL) by using various colour (Yellow, Blue, Green & Whitesheets) sticky traps on various  trap heights (30, 60,90 & 120 centimeters) were instlled  in Randomized complete block design (RCBD) with three replications at fazal stop,Tandoallahyar during March, 2018 for the management of chilli thrip population efficiently. As a results of scouting experiment, it was confirmend that the yellow color sticky trap was significantly attracted highest number of Scirtothrips dorsalis than other sticky traps with significant differences (F=11.58; df=259, P<0.001), also the maximum thrips were captured on traps which were installed at 90cm height as compared to other heights. During management trial, the significant reduction in thrip population was recorded in IPM plots, t-test showed a significant difference (t=6.11, F=0.75; df=114, P<0.0001) in IPM  and conventional plots. Since, the yellow color sticky trap attracted much more number of thrips at the height of 90cm. Thus, it is recommended as important components of IPM for the management of thrip in chilli agri-eco system
Effects of Different Temperatures on the Biology of Acyrthosiphon pisum on Different Pea Cultivars
Authors: Mastoi Abdul Hafeez , Mangrio Wali Muhammad , Sahito Hakim Ali , Sahito Fahmeeda Imdad , Jatoi Faheem Ahmed , Solangi Shazia Parveen
Published: May 2023

The research studies were carried out at Key Laboratory of Entomology, Northwest A & F University, Yangling, Shaanxi under 60±5% Relative Humidity, light: dark photoperiod at 14h: 10h to assess different range temperature effects on the population of Acyrthosiphon pisum on different pea cultivars during, 2018. The results indicated that the shortest pea aphid nymph development period up to (5.75±0.31 days) were lasted on cv. Feizai-3 at 36oC and longest (9.38±0.34 days) were noted on cv. Nenzao at 30oC. The shortest A. pisum adult development period (4.16±0.20 days) were recorded on cv. Hanyi-401 at 39oC and the longest (5.72±0.33 days) on cv. Hanyi-401 at 30oC. The shortest A. pisum longevity period (5.43±0.72 days) were recorded on cv. Feizai-3 at 39oC and longest (11.83±0.72 days) on cv. Hanyi-401 at 30oC. The shortest A. pisum oviposition period (3.61±0.32 days) were recorded on cv. Hanyi-401 at 33oC and longest (4.41±0.35 days) on Guangzhong-604 at 36oC. The minimum nymph survival period was counted (0.23±0.07) on Guangzhong-604 at 36oC and maximum on cv. Hanyi-401 (0.73±0.08) at 30oC. According to the DMRT, Test, non-significant difference was reported in all the above parameters between the cultivars in all temperature regimes. The present study suggests that temperature fluctuations also affect on the life expectancy of A. pisum. In future endeavors more work should be carried out to restrict the pest population of sap-sucking insects to secure the legumes varieties
Effect of Potash Fertilizer on Vegetative Growth and Pod Yield of Groundnut (Arachis hypogaea l.) in Semiarid Region
Authors: Khan Chaker , Memon Dr. Noor un nisa , Wahocho Niaz Ahmed , Akhtar Naseem , Majeedano Memoona Islam , Sharif Naseem , Jamali Muzamil Farooque , Khan Qamber
Published: May 2023

Groundnut (or peanut, earthnut, monkey nut) is taxonomically classified as Arachis hypogaea and it belongs to family Fabaceae (Leguminosae). In Pakistan, the groundnut is mainly cultivated in rain fed areas, mostly in Punjab, also in some areas of Sindh and North-West Frontier Province. A field experiment was carried out at the Horticultural Research area, Sindh Agriculture University, Tandojam during the year 2021. Two ground nut cultivarrs (“Golden” and “Bari-2011”) were used and sulphate of potash (SOP) was used @ 60, 80, 100 kg ha-1as treatments. Different growth and yield related parameters were studied in this experiment, such as days to flowering, plant height (cm), canopy width (cm), pods plant-1, kernels plant-1, 100 kernels weight, pod yield ha-1, edible portion (%) and non-edible portion (%). Randomized Complete Block Design (RCBD) was used with three replications. Results revealed that the potassium applied @ 80 kg ha-1 significantly affected for canopy width (1213.5 cm), pods plant-1 (52.27), kernels plant-1 (100.99), weight of 100 kernels (58.07 g), pod yield (1590.4 kg ha-1) and edible portion (63.50 %). To compare cultivars, Bari-2011 had superior results for early flowering (28.37 days), plant height (18.68 cm), canopy width (1102.9 cm), pods plant-1 (48.00), kernels plant-1 (94.43), weight of 100 kernels (55.26 g), yield (1543.6 kg ha-1) and edible portion (65.31%) as compared to Golden. The results revealed that potassium application at 80 kg ha-1 produced better results for growth and pod yield related attributes of the groundnut. Whereas, “Bari-2011” responded significantly better for growth and yield related parameters as compared to “Golden”
Management of Saline-Sodic Soil through Press Mud and Sulfur Application for Wheat-Pearl Millet Cropping System
Authors: Ahmed Sarfraz , Ahmed Khalil , Nawaz Muhammad Faisal , Rafa Haffezullah , Wakeel Abdul , Yunas Muhammad , Hussain Syed Saqlain , Aulakh Azhar Mahmood , Nawaz Muhammad Qaiser , Bibi Riffat , Shaheen Muhammad Khalid
Published: May 2023

Press mud is a nutrient-rich organic residue and elemental sulfur being a reclamation agent in combination or alone can be used for rehabilitation of salt-affected soils on wheat-pearl millet crops. The results of present study revealed that press mud and sulfur hold excellent potential to reclaim the saline-sodic soil and alleviate the salinity stress in wheat and pearl millet crops. However, integrated use of sulfur (S) and press mud (PM) demonstrated the positive effects on soil health and crop resilience. Application of S @ 50% gypsum requirement (GR) with PM @ 10 t ha-1 showed better results than all other treatments and increased the plant height, number of tillers, spike length, 1000 grain weight, straw yield and grain yield of wheat by 11.16%, 9.87%, 27.93%, 15.65%, 33.54% and 50.26% respectively. Same trend was observed in pearl millet and the plant height, number of tillers, panicle length, grain panicle-1, 1000 grain weight, and grain yield were increased by 16.66%, 22.85%, 13.11%, 9.74%, 13.64%, and19.37% respectively over control. Integrated use of sulfur and press mud also ameliorated the soil properties and reduced the soil pH (4.57%), EC (15.26%), SAR (56.26%), and BD (10.11%) and increased HC (32.5%). Therefore, the integrated sulfur application @ 50% GR and press mud @ 10 t ha-1 are recommended as an effective reclamation strategy to manage the saline-sodic soil for better productivity of wheat and pearl millet crops.
International cooperation on climate research and green technologies in the face of sanctions: The case of Russia
Authors: Shugurov Mark
Published: May 2023

The purpose of this study was to develop the theoretical model for the regime of anti-Russian sanctions against the climate R&D sector, as well as the related green finance sector. Achieving this purpose was carried out on the basis of using the system of the following methods. 1) A method of discursive analysis was applied to texts and statements that occur in scientific articles, analytical reviews and notes in electronic media and discussion pages on the Internet. 2) Meta-analysis was applied to both original works and to primary materials of an empirical nature containing statistical data, which are sometimes of a variable nature. 3) The methodology of stochastic factor analysis served as the basis for considering sanctions as factors that probabilistically determine various changes in Russian science and technology policies and science legislation. 4) The use of the foresight method was aimed at identifying options for the medium- and long-term development of Russia's participation in international cooperation in the field of climate R&D while under sanctions. According to the developed model, the regime of scientific sanctions against Russia is aimed at breaking cooperation with Russian participation at the level of programs and projects. The institutionalization of scientific ruptures has several aspects, such as the freezing of personal contacts, the suspension of funding, as well as the supply of equipment and the provision of services for its maintenance. The peculiarity of scientific sanctions against Russia lies in the unprecedented combination of the national and global scales of their consequences. The study concludes that, due to Russia's significant contribution to climate change, the consequences of scientific, economic and financial sanctions have a negative cumulative effect on the implementation of the global climate agenda. This means the emergence of problems in reducing greenhouse gas emissions due to the partial abandonment of previously formulated climate goals. The model proposed in this study reveals Russia's response to sanction challenges, which means that Russia continues to follow the trend in the development of climate science and improve the institution of green finance.
Modeling the fear effect in the predator-prey dynamics with an age structure in the predators
Authors: Xu Wanxiao , Jiang Ping , Shu Hongying , Tong Shanshan
Published: May 2023

We incorporate the fear effect and the maturation period of predators into a diffusive predator-prey model. Local and global asymptotic stability for constant steady states as well as uniform persistence of the solution are obtained. Under some conditions, we also exclude the existence of spatially nonhomogeneous steady states and the steady state bifurcation bifurcating from the positive constant steady state. Hopf bifurcation analysis is carried out by using the maturation period of predators as a bifurcation parameter, and we show that global Hopf branches are bounded. Finally, we conduct numerical simulations to explore interesting spatial-temporal patterns.
Bipartite consensus for multi-agent networks of fractional diffusion PDEs via aperiodically intermittent boundary control
Authors: Zhang Xinxin , Wu Huaiqin
Published: May 2023

In this paper, the exponential bipartite consensus issue is investigated for multi-agent networks, whose dynamic is characterized by fractional diffusion partial differential equations (PDEs). The main contribution is that a novel exponential convergence principle is proposed for networks of fractional PDEs via aperiodically intermittent control scheme. First, under the aperiodically intermittent control strategy, an exponential convergence principle is developed for continuously differentiable function. Second, on the basis of the proposed convergence principle and the designed intermittent boundary control protocol, the exponential bipartite consensus condition is addressed in the form of linear matrix inequalities (LMIs). Compared with the existing works, the result of the exponential intermittent consensus presented in this paper is applied to the networks of PDEs. Finally, the high-speed aerospace vehicle model is applied to verify the effectiveness of the control protocol.
Telemedicine and mHealth Applications for Health Monitoring in Rural Communities in Colombia: A Systematic Review
Authors: Castillo Verenice Sánchez , Cano Carlos Alberto Gómez , Gonzalez-Argote Javier
Published: May 2023

INTRODUCTION: Telemedicine and mHealth applications constitute a central pillar in the digital transformation of healthcare.OBJECTIVE: To describe the efficacy, applicability, and impact of telemedicine and mHealth applications on the monitoring and improvement of health in rural communities in Colombia.METHODS: This research was carried out as a systematic review, a type of study that allows for a thorough and replicable evaluation of the existing literature in the databases PubMed, Scopus, Embase, Web of Science, Cochrane Library, CINAHL, and ERIC.RESULTS: A total of 14 studies were included, which encompassed different types of research designs: two case-control studies, two randomized trials, four cross-sectional studies, two qualitative investigations, one consensus study, one retrospective cohort study, and two reviews. The sample size varied significantly among the studies, from 16 participants in the consensus study to 313,897 patients in one of the cross-sectional studies.CONCLUSIONS: Telemedicine and mHealth applications are transforming the way medical care is delivered to rural communities in Colombia. These tools have proven to be valuable in improving the detection and management of chronic diseases such as cognitive decline and cardiovascular diseases. At the same time, the implementation of these technologies has shown to be effective in improving the quality of medical care, providing greater access to specialized medical services, and reducing the sense of isolation among health professionals in rural areas.
Контактные векторы точечных решеток
Authors: Grishukhin Vyacheslav Petrovich
Published: May 2023

Контактные векторы решетки $L$ суть векторы $l$, которые минимальны по норме $l^2$ в своем классе четности. Показано, что множество всех контактных векторов решетки $L$ определяет в пространстве всех симметричных матриц подпространство $M(L)$, содержащее матрицу Грама $A$ решетки $L$. Вводится понятие экстремального множества контактных
векторов как множества, для которого пространство $M(L)$ одномерно. В этом случае решетка $L$ жесткая. С каждой дуальной ячейкой решетки $L$ связано множество контактных векторов, содержащихся в ней. Дуальная ячейка экстремальна, если ее множество контактных векторов экстремально. В качестве иллюстрации доказана жесткость корневой решетки $D_n$ для $n\ge 4$ и решетки $E_6^*$, дуальной корневой решетке $E_6$.
Библиография: 9 названий.
Задача Трикоми для одного класса многомерных гиперболо-эллиптических уравнений
Authors: Aldashev Serik Aimurzaevich
Published: May 2023

В работе показана разрешимость пространственной задачи Трикоми для одного класса
многомерных гиперболо-эллиптических уравнений.
Библиография: 22 названия.
Возмущения целочисленной последовательности - нулевые множества делителей
в некоторых пространствах целых функций
Authors: Abuzyarova Natal'ya Fairbakhovna
Published: May 2023

Рассматриваются весовые пространства целых функций - образы при преобразовании Фурье-Лапласа пространств ультрараспределений минимального типа и норамального типа на вещественной прямой. Изучаются делители этих пространств. А именно, выясняются условия на возмущающую последовательность, при которых целочисленная последовательность, возмущенная ею, будет нулевым множеством целой функции - делителя одного из указанных пространств.
Библиография: 20 названий.
К вопросу определяемости некоторых классов вполне разложимых абелевых групп без кручения своими группами гомоморфизмов
Authors: Pushkova Tat'yana Aleksandrovna , Sebel'din Anatolii Mikhailovich
Published: May 2023

Пусть $C$ - абелева группа. Класс $X$ назовем $_{C}H$-классом,
если для любых групп $A,B\in X$ из изоморфизма групп $\operatorname{Hom}(C,A)$ и $\operatorname{Hom}(C,B)$
следует изоморфизм групп $A$ и $B$. В статье исследуются условия, которым должна удовлетворять
вполне разложимая абелева группа $C$, чтобы класс некоторых вполне разложимых абелевых групп без кручения был $_{C}H$-классом.
Библиография: 8 названий.
Равномерная сходимость на подпространствах в эргодической теореме фон Неймана с дискретным временем
Authors: Kachurovskii Alexander Grigoryevich , Podvigin Ivan Viktorovich , Khakimbaev Aziz Jamalatdin uli
Published: May 2023

Рассматривается степенная равномерная (в операторной норме) сходимость на векторных подпространствах со своими нормами
в эргодической теореме фон Неймана с дискретным временем. Найдены все возможные показатели степени рассматриваемой степенной сходимости; для каждого из этих показателей даны спектральные критерии такой сходимости и получено полное описание
всех таких подпространств. Равномерная сходимость на всем пространстве имеет место лишь в тривиальных случаях,
что объясняет интерес к равномерной сходимости именно на подпространствах.
Кроме того, попутно обобщены и уточнены старые оценки скоростей сходимости в эргодической теореме фон Неймана для сохраняющих меру отображений.
Библиография: 26 названий.
Достаточные условия линейной сходимости одного алгоритма для нахождения метрической проекции точки на выпуклый компакт
Authors: Balashov Maxim Viktorovich
Published: May 2023

Многие задачи, например, задачи о свойствах множества достижимости линейной управляемой системы, сводятся к нахождению проекции нуля на некоторое выпуклое компактное подмножество в конечномерном евклидовом пространстве. Последнее множество задано своей опорной функцией. В настоящей работе обсуждаются некоторые минимальные достаточные условия, которые надо наложить на выпуклое компактное множество для того, чтобы метод проекции градиента для решения задачи о нахождении проекции нуля на это множество сходился с линейной скоростью. На примере показана существенность указанных условий.
Библиография: 12 названий.
Оценка второго коэффициента голоморфных отображений круга в себя с двумя неподвижными точками
Authors: Kudryavtseva Olga Sergeevna , Solodov Aleksei Petrovich
Published: May 2023

На классе голоморфных отображений единичного круга в себя с внутренней и граничной неподвижными точками рассматривается задача описания областей тейлоровских коэффициентов в зависимости от значений угловой производной в граничной неподвижной точке. Найден оптимальный орицикл, содержащий область изменения второго коэффициента.
Библиография: 15 названий.
Эволюция сферических возмущений в космологической среде вырожденных скалярно заряженных фермионов со скалярным взаимодействием Хиггса
Authors: Ignatev Yuriy Gennadievich
Published: May 2023

Построена математическая модель эволюции сферических возмущений в космологической однокомпонентной статистической системе полностью вырожденных скалярно заряженных фермионов со скалярным взаимодействием Хиггса. Построена полная система самосогласованных уравнений для малых возмущений, описывающих эволюцию сферических возмущений. Выделены сингулярные части в модах возмущений, соответствующие точечным массе и скалярному заряду. Получены системы обыкновенных дифференциальных уравнений, описывающих эволюцию массы и заряда сингулярного источника, и системы дифференциальных уравнений в частных производных, описывающие эволюцию несингулярных частей возмущений. Коэффициенты уравнений в частных производных описываются решениями эволюционных уравнений для массы и заряда. Задача о пространственно локализованных возмущениях для полиномиальных по радиальной координате решений сведена к рекуррентной системе обыкновенных линейных дифференциальных уравнений на коэффициенты этих полиномов. Изучены свойства решений в случае кубических полиномов, в частности показано, что радиусы локализации гравитационных и скалярных возмущений совпадают и эволюционируют пропорционально масштабному фактору. Проведено численное моделирование эволюции возмущений, подтвердившее экспоненциальный рост центральной массы возмущения, а также выявившее колебательный характер эволюции скалярного заряда.
Влияние облака струн и квинтэссенции на фазовый переход в заряженных вращающихся черных дырах анти-де Ситтера
Authors: Daassou Ahmed , Benbrik R , Laassiri H
Published: May 2023

Исследованы фазовый портрет и критическое поведение в расширенном фазовом пространстве одного типа черных дыр, а именно черной дыры Керра-Ньюмена-анти-де Ситтера в присутствии сферически-симметричного облака струн и квинтэссенции. Космологическая постоянная интерпретируется как термодинамическое давление, и в рамках этого подхода представлены основные этапы получения выражений для таких термодинамических величин, как температура Хокинга $T$, свободная энергия Гиббса $G$ и теплоемкость $C$. Для этого вводится подходящее аналитическое приближение параметра вращения $a$ как функции от всех важных параметров - космологической постоянной, энтропии $S$, параметров квинтэссенции и облака струн, заряда $Q$ и углового момента $J$ системы. Численно найдены критические точки, кроме того, построены фазовые диаграммы $\widetilde T$-$\widetilde S$, $\widetilde G$-$\widetilde T$, $\widetilde C$-$\widetilde S$ в пространстве приведенных параметров. Показано, что эти диаграммы зависят от параметров квинтэссенции и облака струн. Анализ диаграмм приводит к выводу, что, когда облако струн и квинтэссенция окружают заряженную вращающуюся черную дыру анти-де Ситтера, эти два дополнительных источника энергии не влияют на существование фазового перехода от малой к большой черной дыре. Таким образом, черные дыры демонстрируют фазовый переход, подобный переходу в жидкости Ван дер Ваальса. Использующийся подход имеет некоторые важные следствия. С одной стороны, его можно использовать для анализа критического поведения черной дыры Керра-Ньюмена-анти-де Ситтера с облаком струн и квинтэссенцией в случае многомерного (более чем четырехмерного) пространства-времени, а с другой стороны, применение этого подхода может сыграть важную роль в исследовании фазового перехода для других сложных черных дыр.
Контрастные структуры в задаче реакция-адвекция-диффузия,
возникающей в дрейфо-диффузионной модели полупроводника, в случае
негладкой реакции
Authors: Nikulin Egor Igorevich
Published: May 2023

Рассмотрена краевая задача для сингулярно возмущенного уравнения реакция-адвекция-диффузия в случае малой нелинейной адвекции и негладкой реакции, возникающая в дрейфо-диффузионной модели полупроводника. Ключевой особенностью исследуемой задачи является разрыв производной реактивного слагаемого относительно пространственной координаты в некоторой заранее известной точке, лежащей внутри рассматриваемого интервала. С помощью асимптотического метода дифференциальных неравенств показано, что у поставленной задачи могут сосуществовать несколько решений, обладающих в малой окрестности точки разрыва внутренним переходным слоем. Каждое из этих решений может быть как асимптотически устойчивым по Ляпунову, так и неустойчивым, для обоих этих случаев выявлены достаточные условия. Из результатов асимптотического исследования следует, что при условии заданного внешнего тока в полупроводнике c N-образной зависимостью скорости дрейфа от напряженности электрического поля в малой окрестности некоторой его внутренней точки могут сосуществовать два соседствующих стационарных обедненных электронами слоя, если в этой точке равновесная концентрация электронов является недостаточно гладкой функцией пространственной координаты.
Association Between the Availability of Mobility Assistive Products and Participation Outcomes in Individuals With Spinal Cord Injury in Switzerland
Authors: Fong Angelene , Gemperli Armin , de Vries Wiebe
Published: May 2023

Objectives

This study investigated the association between the reported availability of mobility assistive products and the perceived frequency, restriction, and satisfaction of participation in individuals with spinal cord injury in Switzerland.

Methods

This study was based on a cross-sectional analysis based on questionnaire data collected from the Swiss SCI Cohort Study community survey in 2012 (N = 492). The availability of 12 mobility assistive products were analyzed as the main predictor variable. The outcomes of interest were the frequency, restriction, and satisfaction of participation scales as measured by the 32-item Utrecht Scale for Evaluation of Rehabilitation–Participation (USER-P). The association between availability of mobility assistive products and participation was investigated using linear regressions analyses. All mobility assistive products were ranked in terms of relevance to improve participation by means of an importance performance plot.

Results

The availability of a sports wheelchair or a hand bike were both significant in reducing the restriction to participation. Having an adapted car increased the frequency of participation.

Conclusion

The availability of a sports wheelchair or a hand bike was significantly associated with less restriction in participation. With an unmet need of up to 36%, the known health benefits of regular physical activity and thereby cost-saving potential for the health care system, external support in the acquiring or use of these sports-related mobility assistive products could be an easy target for intervention.
IMPLEMENTATION OF SEM-PLS MODELING ON THE IMPACT OF THE REGIONAL COMPETITIVENESS INDEX ON SOCIOECONOMIC MACRO VARIABLES
Authors: Sihombing Pardomuan Robinson , Arsani Ade Marsinta , Purwanti Dyah , Budiantono Sigit
Published: May 2023

The Regional Competitiveness Index (RCI) is one of the essential indicators to measure the ability of a region to compete with other regions in the economic, social, and environmental fields. Increasing regional competitiveness is one of the goals desired by every local government to encourage economic growth and community welfare. This study aims of the research to find out the relationship between the Regional Competitiveness Index (RCI) and socioeconomic macroeconomic variables such as the growth of Gross Regional Domestik Bruto (GRDP), Human Development Index (HDI), Foreign Investment, Domestic Investment, Regional Income and poverty rates in Indonesia in 2022 in Indonesia. The data used are publication data from the National Innovation Research Agency (BRIN) and the Statistic Indonesia (BPS) in 2022. The analysis model used is the PLS Structural Equation Model (SEM) model with SmartPLS software. The results showed that RCI significantly positively affected HDI, GRDP growth, Domestic Investment, Foreign Investment, and Regional Income. On the other hand, RCI significantly negatively affects the percentage of poor people. A comprehensive and targeted policy is needed so that the Regional Saiang Power Index continues to increase. In addition, supervision is needed related to programs that have been running related to regional competitiveness
DESKRIPSI PEMBELAJARAN DARING MATA PELAJARAN MATEMATIKA PADA MASA PANDEMI COVID-19
Authors: Malonda Karmelia Kristi , Domu Ichdar , Tumalun Nicky Kurnia
Published: May 2023

This study aims intended to describe the difficulties of online learning in mathematics for class IX students of SMP Negeri 9 Satap Langowan. This type of research is a qualitative descriptive study with a sample of class IX students with a total of students 22 and 1 teacher of mathematics in class IX. There are 3 data collection techniques used by researchers, namely: first, interviews with class IX mathematics teachers. Second, a questionnaire filled out by class IX students and thirdly documentation related to research images. Data analysis in this study is data reduction, data presentation, and drawing conclusions. Through observations made, students and teachers experienced difficulties when learning online, there are two kinds of difficulties that are found, namely the general difficulties experienced by schools and teachers is that there is no readiness from teachers when facing online learning because all learning from conventional changes to modern. These changes completely changed both the concept, the strategy method and even the assessment from the teacher to the students. There are also students who have difficulty understanding mathematics learning given by the teacher through the WhatsApp Group application
PENERAPAN FLIPPED CLASSROOM DIINTEGRASIKAN DENGAN PROBLEM BASED LEARNING TERHADAP KEMAMPUAN NUMERASI SISWA SMA
Authors: Nisya Khoirin , Nindiasari Hepsi
Published: May 2023

This study aims to determine the effect of applying the Flipped Classroom learning model integrated with Problem Based Learning on the numeracy skills of high school students. The research sample consisted of 39 experimental class students who used the flipped classroom model integrated with Problem Based Learning and 39 control class students who used the Problem Based Learning model from the population of SMAN 5 Serang city. The research method used was quasi experiment. The instrument used in collecting data was a test instrument in the form of a pretest and postest consisting of three description questions. The data were analyzed by one-way anova test with a significance level of 0.05 to see the average difference between the two classes. The results showed that the pretest value of numeracy skills obtained a Sig. 0.159 > 0.05 so that H_0 is accepted. meaning that the experimental class and control class have the same initial ability. then for the posttest value of numeracy skills obtained a Sig value. 0.21 <0.05 so that H_0 is rejected. This means that there is an average difference in numeracy skills between the experimental class and the control class. When viewed from the average numeracy skills of experimental class students are smaller than the control class, namely 40.05 < 51.51. Thus, the Problem Based Learning learning model is better than the Flipped Classroom model in improving the numeracy skills of high school students on the material of the system of linear equations of three variables
PERHITUNGAN PRODUKSI OVERBURDEN DENGAN MENGGUNAKAN METODE OVERALL EQUIPMENT EFFECTIVENESS (OEE) DAN NILAI OEE DARI EXCAVATOR KOBELCO SK-200
Authors: Rospitasari Vitri , Purwandari Diana , Nugraha Aditya Budi
Published: May 2023

PT. Starindo Sakti Award is the place to carry out this research which is located in Pangandaran. This study uses the Overall Equipment Effectiveness (OEE) method to optimize mining equipment in achieving production targets for overburden stripping. Overall Equipment Effectiveness (OEE) is a method that has been accepted globally to measure the level of a company and the potential for improvement of the production process. Overall Equipment Effectiveness (OEE) aims to evaluate the performance of an equipment used in industry. The factors to be calculated on the OEE component are: Availability Factor, Utilization Factor, Speed ​​Factor, Bucket Factor, Overall Equipment Effectiveness (OEE) of Equipment. The results of the calculation of overburden production using the OEE method after improving working time by reducing standby time and increasing operating hours, the overburden production obtained from the Kobelco SK-200 excavator is 20,160.22 BCM. While the Overall Equipment Effectiveness (OEE) value of the Kobelco SK-200 excavator after repairs is 60%.
METODE MARKOV CHAIN DALAM PENGENDALIAN PERSEDIAAN UNTUK PERENCANAAN BIAYA PERSEDIAAN BAHAN BAKU PADA TOKO AIRIN BAKERY & CAKE SHOP
Authors: Novia Putri Rahma , Rakhmawati Fibri , Aprilia Rima
Published: May 2023

Airin Bakery & Cake Shop produces various kinds of cakes and bread. This shop is often faced with problems that occur, namely the supply of raw materials that are insufficient or excess so that the production process does not go well. This study aims to determine the ordering capacity and the right time to order raw materials to minimize the total cost of raw material inventory using the silver meal method. The total inventory cost is Rp. 14,637,947.4 less than the cost set by the company. Inventory control, which is a stochastic process, can also be carried out without regard to safety stock, lead time, and reorder points. The stochastic process of total inventory can be described by a finite number of states. The probability of transitions between these states is described by a markov chain. The markov chain method can predict future raw material inventory costs. After making several states on the amount of raw material inventory, a prediction of the future raw material inventory costs of Rp.31.747.932,98 is obtained
An Uncommon Disease with a Common Presentation: Severe Back pain and Diffuse Neuropathy in Two Cases of Hereditary Neuropathy with Liability to Pressure Palsy
Authors: Jerath Nivedita U
Published: May 2023

Introduction: Hereditary Neuropathy with liability to Pressure Palsy (HNPP) is an autosomal dominant genetic disorder characterized by multiple episodes of focal weakness and sensory loss caused by compression or trauma. HNPP is rare disorder and often exhibits cranial nerve involvement, sensorineural deafness and scoliosis. Individuals diagnosed with this condition typically exhibit a primary deficit of a single nerve palsy that can result in numbness, paresthesias, or weakness.

Case Presentation: Two unrelated individuals with HNPP were evaluated with clinical, laboratory, electrophysiological and genetic testing. Case 1 was a 32-year-old man who presented with an episode of transient right arm weakness and severe back pain. Case 2 was a 46-year-old woman who presented with severe back pain and diffuse paresthesias, which was diagnosed as HNPP.

Discussion: These cases present common symptoms that are uncommon for the typical HNPP patient. This report serves to contribute new information to the body of evidence describing HNPP.

Conclusion: Although HNPP typically presents with transient compressive mononeuropathies, this study suggests that HNPP can present with various broad clinical presentations, including severe back pain. Neurologists need to broaden their spectrum of clinical presentations to help diagnose these rare conditions.