bluuebunny/crossref_metadata_2025 huggingface dataset:
Hydraulic calculation improvement of polymer and metal-polymer pressure pipelines
Authors: Prodous O. A. , Yakubchik P. P. , Terekhov L. D. , Shlyichkov D. I.
Published: February 2024

The relevance of this paper is determined by the pipe manufacturing from polymer and metal-polymer materials, that requires hydraulic calculations.

Purpose: The purpose is to describe reasons affecting the accuracy of the hydraulic calculation of pipes made of polymer materials and show changes in their hydraulic potential, depending on these reasons.

Methodology/approach: Assessment of the influence of process parameters on hydraulic characteristics, classical equations of hydraulic calculation of water pipes.

Research findings: The paper shows the influence of technological tolerances for the outer/inner diameter of pipes and the pipe wall thickness on the accuracy of hydraulic calculation of pipes made of polymer materials.

Value: It is advisable to establish regulatory requirements for inner surface roughness of pipes made of polymer materials and perform their hydraulic calculation with respect to real hills and valleys which constitute surface roughness.
Investment and construction project management system with the use of building information modeling
Authors: Saenko I. A. , Shpen'kova T. A. , Saenko Ya. D.
Published: February 2024

One of the key principles of the construction industry development until 2030 is the transition to building information modeling at all stages of the life cycle of the capital construction object. The process of digital transformation not only affects and changes the final product, but also requires a full-fledged re-engineering of the company's internal processes.

Purpose: The aim of this paper is to conduct the systems analysis of construction stage management within the framework of investment and construction project realization in the conditions of digital transformation.

Research findings: The model of the life cycle management system of the capital construction object is developed using basis the information model.

Value: Two main problems are outlined, that must be solved to implement the developed management system into practice.
High-rise building foundation design of the Lakhta Center
Authors: Nikiforov S. V.
Published: February 2024

The foundation is the most significant element of buildings. The foundation structure closely relates to the general construction of the building frame and is largely determined by soil conditions. High-rise buildings are complex engineering structures with increased requirements for strength, stability and durability. Therefore, their safety and durability depend on strength, deformity and stability of foundation. These principles allow creating foundations of the higher quality, bearing capacity, reliability, and durability.

Purpose: Optimization of production processes in the construction of foundation structures of super tall buildings and structures.

Research findings: The structural design of the Lakhta Center 462 m high in Saint-Petersburg, which is the tallest building in Europe. A particular attention is paid to the design and construction of the foundation. Key results can prove operation and design of high-rise buildings designed for weak and unstable soils.

Value: Determination of the most significant factors influencing the choice of production processes during the construction of super-tall buildings.
Influence of personal mobility devices on environmental amenities
Authors: Astafiev S. A. , Astafieva P. S.
Published: February 2024

Electric scooters are rapidly involved in our life, and every year their lease increases and spreads to more cities. Urban infrastructure never keeps up with progress and cannot provide these vehicles with the appropriate infrastructure. In this regard, it is important to solve problems of adapting modern means of transportation with respect to comfortable and safe traffic.

Purpose:The analysis of the current situation with personal mobility devices and their impact on the urban environment.

Methodology/approach:Sociological survey and analysis of improving amenities environment to ensure the operation of personal mobility devices.

Research findings:The analysis of introduced traffic rules for personal mobility devices in 2023, where the status of transport is officially assigned to electric scooters. there is a need to separate roads and create the bicycle path infrastructure to minimize accidents. Results show positive and negative consequences of using electric scooters in cities. It is shown that the urban environment quality index in different cities is determined by the distance of bicycle paths in cities.
Lei e desejo na clínica com adolescentes
Authors: Lima Joseana Simone Deckmann
Published: February 2024

O presente trabalho aborda brevemente a especificidade da clínica em um Centro de Internação de Adolescentes, dos atendimentos com adolescentes que cumprem “medida sócioeducativa”, através do encaminhamento judicial. Leva em conta, tanto Lacan, como Freud, apontando o desejo inextricavelmente vinculado à Lei que institui o simbólico, que indica mais do que uma proibição, a presença da impossibilidade. Em alguns casos, o adolescente em seu Ato burla a Lei, em um movimento paradoxal de ultrapassá-la e provar a possibilidade de alcançar a plenitude, e ao mesmo tempo numa demanda de contenção buscando no Estado, uma proteção / responsabilização que promova um apaziguamento da angustia e lhe dê um lugar no mundo. Além disso, o texto propõe a possibilidade de escutar esse sujeito adolescente e seu sofrimento, levando em consideração, principalmente, a ética da psicanálise, que longe de propor um discurso moral, é a ética do desejo fundada no referenciamento da ação humana ao Real, ao impossível do gozo. Na aposta de uma escuta que possibilite ao sujeito suportar o real que o invade e que este se responsabilize pelo mal do qual se queixa.

Palavras-chave:

Adolescente, Psicanálise, Desejo, Lei, Ética.
silêncio em tempos de pandemia
Authors: Oliveira Beatriz
Published: February 2024

O presente trabalho procura refletir quais foram alguns efeitos para sujeitos crianças durante a pandemia do Coronavírus. Tanto o convívio familiar constante quanto a angústia diante das notícias de doença e morte tiveram consequências levando muitas crianças a apresentarem sintomas que antes não haviam aparecido. Tais consequências não acometeram apenas as crianças, mas a especificidade destes sujeitos ficarem submetidos aos cuidados do outro, implicou em formas sintomáticas de expressar seu incômodo e mal-estar quando não conseguiram usar a palavra para serem escutados.
criança e as pílulas
Authors: Silva Mônica Oliveira
Published: February 2024

Não é de hoje que a intersecção entre a cultura de consumo e a medicalização do sofrimento permeia as discussões do campo psicanalítico. A psicanálise, que causa uma subversão no discurso da ciência ao pensar o sujeito em sua divisão subjetiva, têm sido cada vez mais provocada a pensar sobre os fenômenos contemporâneos de categorização, universalismo e aversão à alteridade.

Sendo assim, como podemos então pensar a infância neste cenário de supressão das singularidades em prol da padronização das individualidades? Que lugar é dado ao sintoma da criança hoje? Certamente o discurso cientifico tem tido um papel relevante nesta discussão, já que temos observado a crescente proliferação de diagnósticos psiquiátricos na infância. Como pensar o mal-estar da infância contemporânea sem cair nas malhas do discurso patologizante? A aposta continua sendo na ética sustentada pelo discurso do analista.
The historical adventures of Takeshi Kawase: the mountaineer who explored the "no man’s land" with love for art, nature, and humankind
Authors: Ganaha Sara , Shibao Shunsuke
Published: February 2024

The anterior petrosal approach, or Kawase’s approach, is a commonly used technique in skull base surgery to access the brainstem in the posterior fossa from the middle fossa, and has the advantages of minimizing brain retraction and preserving hearing. It was first successfully performed by the legendary Japanese neurosurgeon, Takeshi Kawase, for the clipping of a basilar artery aneurysm in 1981. To date, no historical article has shed light on Kawase’s intriguing personal history. In this historical vignette, the authors depict Kawase’s unique background, talent, passion, as well as struggles that ultimately shaped his career. By sharing Kawase’s personal story from the hospital where he first successfully performed his original approach, the authors hope to pass on to future generations Kawase’s spirit and philosophy that have impacted the global neurosurgical community.
Correlation Seminar during Basic Medical Science: Our Experience
Authors: Rokaya Dhirendra , Paudel Neetika
Published: February 2024

Correlation seminars are used in teaching curricula as a strategy to encourage students to build a solid foundation in basic science at the beginning of the learning process. Establishing a link between basic science and medical practice is the main objective of the correlation seminar which helps students relate topics from basic science with a medical application or disease. Correlation seminars are designated in such a way that students can apply their basic science knowledge acquired from lectures and practical classes in clinical patient care. Course-centred problem-solving emphasises the identification and resolution of clinical issues to enhance clinical reasoning abilities. Through correlation seminars, students are allowed to engage in critical thinking and apply their knowledge of basic science to clinical settings.
Periodontal Lesions among Maxillary Sinus Mucosal Thickening Visiting the Department of Oral Medicine and Radiology of a Tertiary Care Centre
Authors: Bali Harleen , Neupane Manisha , Mahanta Swagat Kumar , Niroula Deepa , Upadhyaya Chandan , Kafle Dashrath
Published: February 2024

Introduction: Maxillary sinus due to its proximity to posterior maxillary teeth could be affected by their pathology. Since cone beam computed tomography is the go-to for 3-D imaging in dental set-up. This study aimed to find out the prevalence of periodontal lesions among maxillary sinus mucosal thickening visiting the Department of Oral Medicine and Radiology of a tertiary care centre.
Methods: This descriptive cross-sectional study was conducted in the Department of Oral Medicine and Radiology of a tertiary care centre from 01 February 2021 to 30 June 2021 after obtaining ethical approval from the Institutional Review Committee. The medical records from 01 January 2019 to 31 December 2019 were retrieved. The identification of maxillary sinus mucosal thickening of more than 3 mm, in cone beam computed tomography images, was registered separately for the right and left sinuses of each patient. The presence of periodontal lesions of posterior teeth was recorded. A convenience sampling method was used. The point estimate was calculated at a 95% Confidence Interval.
Results: Among 195 maxillary sinus mucosal thickening, periodontal lesions were found in 74 (37.95%) (31.14-44.76, 95% Confidence Interval) maxillary sinuses of 46 patients. The mean age was 53.67±12.72 years and 30 (65.21%) were males.
Conclusions: The prevalence of periodontal lesions among maxillary sinus mucosal thickening in CBCT images was similar to other studies done in similar settings.
Zellweger Syndrome: A Case Report
Authors: Yogi Prajwala , Bahik Chunauti , Yadav Rahul , Bhattarai Puja , Pandey Rakshya , Manandar Sunil Raja
Published: February 2024

Zellweger syndrome is an autosomal recessive disease within the spectrum of peroxisome biogenesis disorder manifesting in the neonatal period with profound dysfunction of the central nervous system, liver and kidney. Common clinical presentations include hypotonia, seizure, hepatomegaly, craniofacial dysmorphism and early death. Mutation in one of the PEX genes coding for a peroxisome assembly protein creates a functionally incompetent organelle causing accumulation of very long chain fatty acids in various organs. Here we report the case of a 5-month-old male presented at birth with hypotonia, poor feeding, gross congenital anomalies and later during early infancy with failure to thrive, several episodes of seizures, aspiration due to feeding difficulties and recurrent severe pneumonia. A whole genomic sequencing brought us to the final diagnosis of Zellweger syndrome. Despite an absence of treatment options, prompt diagnosis of Zellweger syndrome is important for providing appropriate symptomatic care, definitive genetic testing and prenatal counselling.
Non-Communicable Diseases among Women of Reproductive Age Visiting the Department of Obstetrics and Gynecology of a Tertiary Care Hospital
Authors: Yadav Indra , Jyoti Sabita , Bahik Chunauti , Acharya Jiya , Bohaju Anjana , Yadav Siddhartha Kumar
Published: February 2024

Introduction: Non-communicable diseases are a significant cause of mortality worldwide, posing a substantial risk to women's health, as stated by the World Health Organization. In Nepal, a survey revealed that 10.5% of the population suffers from hypertension. The primary objective of this study was to determine the prevalence of non-communicable diseases among women of reproductive age visiting the Department of Obstetrics and Gynecology of a tertiary care hospital.
Methods: A descriptive cross-sectional study was conducted at the Department of Obstetrics and Gynecology among women of reproductive age presented from 6 November 2023 to 6 January 2024. The data was retrieved from the medical record during 1 November 2023 to 1 December 2023. Ethical approval was taken from the Institutional Review Committee. Convenience sampling method was used. The point estimate was calculated at a 95% Confidence Interval.
Results: The prevalence of non-communicable diseases was 608 (39.02%) (36.60-41.45, Confidence Interval). The mean age was 29.26±3.46 years. The most common non-communicable disease reported was hypertension 204 (33.55%) followed by chronic respiratory diseases 200 (32.89%) and diabetes mellitus 154 (25.34%).
Conclusions: The prevalence of non-communicable diseases among women of reproductive age group was higher as compared to other studies done in similar setting. The study underscores the urgency for stakeholders to implement health education, early detection, and preventive strategies, emphasizing the necessity of targeted interventions and broader public health initiatives to address non-communicable diseases.
Dandy-Walker Malformation with Neonatal Meningitis: A Case Report
Authors: Pradhan Bishal , Sharma Bishal , Acharya Pratistha , Thapa Suraksha , Chand Jyoti , Bista Simran
Published: February 2024

Dandy-Walker syndrome is a rare congenital central nervous system malformation. Dandy-Walker variant is characterised by cerebellar vermian hypoplasia, cystic fourth ventricular dilatation, and normal posterior fossa volume. Various prenatal tests such as ultrasound, fetal magnetic resonance imaging, and amniocentesis can help diagnose Dandy-Walker syndrome. Here, we report a case of the Dandy-Walker variant with meningitis in a neonate admitted to the neonatal intensive care unit due to multiple petechiae on the anterior abdominal wall, accompanied by peripheral cyanosis at the time of birth. Although maximum cases are diagnosed prenatally, some cases might be missed due to inadequate antenatal examination. Magnetic imaging resonance of the brain is best for the diagnosis of Dandy-Walker syndrome postnatally.
Landscape and meteorological determinants of malaria vectors’ presence and abundance in the rural health district of Korhogo, Côte d’Ivoire, 2016- 2018, and comparison with the less anthropized area of Diébougou, Burkina Faso
Authors: Taconet Paul , ZOGO BARNABAS , ALOU LUDOVIC P AHOUA , KOFFI ALPHONSINE AMANAN , DABIRÉ ROCH KOUNBOBR , PENNETIER CÉDRIC , Moiroux Nicolas
Published: February 2024

Background: Understanding how weather and landscape shape the fine-scale distribution and diversity of malaria vectors is crucial for efficient and locally tailored vector control. This study examines the meteorological and landscape determinants of (i) the spatiotemporal distribution (presence and abundance) of the major malaria vectors in the rural region of Korhogo (northern Côte d'Ivoire) and (ii) the differences in vector probability of presence, abundance, and diversity observed between that area and another rural West African region located 300 km away in Diébougou, Burkina Faso.Methods: We monitored Anopheles human-biting activity in 28 villages of the Korhogo health district for 18 months (2016 to 2018), and extracted fine-scale environmental variables (meteorological and landscape) from high-resolution satellite imagery. We used a state-of-the-art statistical modeling framework to associate these data and identify environmental determinants of the presence and abundance of malaria vectors in the area. We then compared the results of this analysis with those of a similar, previously published study conducted in the Diébougou area.Results: The spatiotemporal distribution of malaria vectors in the Korhogo area was highly heterogeneous and appeared to be strongly determined and constrained by meteorological conditions. Rice paddies, temporary sites filled by rainfall, rivers and riparian forests appeared to be the larval habitats of Anopheles mosquitoes. As in Diébougou, meteorological conditions (temperatures, rainfall) appeared to significantly affect all developmental stages of the mosquitoes. Additionally, ligneous savannas were associated with lower abundance of malaria vectors. Anopheles species diversity was lower in Korhogo compared to Diébougou, while biting rates were much higher. Our results suggest that these differences may be due to the more anthropized nature of the Korhogo region in comparison to Diébougou (less forested areas, more agricultural land), supporting the hypothesis of higher malaria vector densities and lower mosquito diversity in more anthropized landscapes in rural West Africa.Conclusion: The study offers valuable insights into the landscape and meteorological determinants of the spatiotemporal distribution of malaria vectors in the Korhogo region and, more broadly, in rural west-Africa. The results emphasize the adverse effects of the ongoing landscape anthropization process in the sub-region, including deforestation and agricultural development, on malaria vector control.
PENGARUH KEPUASAN KERJA DAN MOTIVASI KERJA TERHADAP KINERJA KARYAWAN PT. DARYA VARIA LABORATORIA TBK - SEMARANG
Authors: Putri Almira Amara , Nawatmi Sri
Published: February 2024

Penelitian ini bertujuan untuk mengetahui pengaruh kepuasan kerja dan motivasi kerja terhadap kinerja karyawan di PT. Darya Varia Laboratoria Tbk – Semarang. Jumlah sampel yang digunakan sebanyak 114 responden dengan menggunakan metode sensus. Teknik sampel kuesioner menggunakan skala Likert. Variabel independen yang dipilih adalah kepuasan kerja dan motivasi kerja, sedangkan variabel dependennya adalah kinerja karyawan. Teknik analisis yang digunakan adalah analisis regresi linier berganda. Data diolah menggunakan aplikasi SPSS 26. Dari hasil penelitian menunjukkan hasil bahwasannya kepuasan kerja dan motivasi kerja  berpengaruh positif terhadap kinerja karyawan. Variabel yang paling mempengaruhi kinerja karyawan adalah variable kepuasan kerja.
Numerical Cohesive Zone Modeling (CZM) of Self-Anchoring AM Metal-CFRP joints
Authors: Altunok Fikret Enes , De Pasquale Giorgio
Published: February 2024

The escalating importance of lightweight design in engineering demands innovative strategies to tackle this challenge. Traditionally, the joining of these materials involves rivets, bolts, or adhesives. However, contemporary manufacturing techniques, such as 3D printing, present the potential to fabricate joints without the necessity for additional binding mechanisms. This paper delves into a promising initiative concerning the joining of multimaterial systems, specifically composites and metals. The fabrication of the metal component of the joint through additive manufacturing (AM) enables the manipulation of surface geometry by incorporating patterned anchors. This, in turn, facilitates the direct co-curing of the composite onto the modified metallic surface. The primary objective is to enhance mechanical interlocking without relying on traditional fastening elements or adhesives. The study evaluates various anchor geometries to assess their efficacy in increasing the overall joint strength. This assessment employs the cohesive zone modeling (CZM) method to simulate joint specimens, followed by comparative analyses to quantify the strengths of the joints.
A Discussion of the Pedagogical Benefits of Nodal Knowledge in University Physics
Authors: Chen Fengmei , Tang Fanbin , Wei Lanxiang , Su Yao , Yan Yanghao , Li Wugang
Published: February 2024

Focusing on nodal knowledge in university physics, this paper describes the definition and categorisation of nodal knowledge, revealing its characteristics and its connection to core knowledge. Through in-depth analyses, it is found that nodal knowledge is an important link in the physics subject that promotes and extends core knowledge, embodying the characteristics of fundamentality, selectivity, transition and diversity. In addition, this paper also highlights the superiority of using nodal knowledge for teaching, which not only helps students reduce the burden of memorisation, but also promotes the construction of a clear structure in the knowledge network and the understanding of the ins and outs of knowledge. Crucially, nodal knowledge makes it easier for students to understand and derive subject knowledge, thus helping them to master it more effectively.
Cross-Border Factors and Trade Agreements Affecting Meat, Milk and Fisheries Exports from Pakistan: Evidence from the Gravity Model Analysis
Authors:   Department of Economics, Division of Management and Administrative Science, University of Education, Lower Mall, Lahore, Pakistan., Hayat Naveed , Ishaq Faisal ,   Department of Economics, Division of Management and Administrative Science, University of Education, Lower Mall, Lahore, Pakistan.
Published: February 2024

The livestock and fishery sectors of Pakistan, not only contributes to GDP but can also considerably boosts export revenue for the country. This study identifies the cross-border factors and trade agreements affecting meat, milk, and fisheries exports from Pakistan. To accomplish this objective, the study used three different panel dataset of countries that import milk, meat, and fish from Pakistan. Results from commodity-specific gravity models show that increase in income in importing countries increases exports of the three products from Pakistan. Moreover, distance between Pakistan, and milk and milk products importing countries significantly reduces milk and milk products exports from Pakistan. Furthermore, an increase in the population of the age group of 65 and above increases milk and milk products exports. Besides, an increase in exchange rate in importing countries also decreases Pakistani meat and fishery exports. Countries who signed TIFA with Pakistan received higher exports of milk and milk products from Pakistan. The free trade agreements of other countries with Pakistan results in lower meat exports as compared to transit trade agreements. Finally, countries who signed preferential trade agreements with Pakistan received higher fishery exports. Findings of this study would provide valuable input for policymakers which in turn will enable them to devise appropriate commercial policies for milk, meat, and fishery products.
Dynamics of Education Expenditure, Health Expenditure and Economic Growth: The Case of Selected SAARC Countries
Authors:   Department of Economics, University of Sargodha, Punjab, Pakistan, Ud Din Imad , Sher Falak ,   Department of Economics, University of Sargodha, Punjab, Pakistan, Ullah Awan Rehmat ,   Department of Economics, University of Sargodha, Punjab, Pakistan
Published: February 2024

This study examines the dynamics of expenditures on education; expenditures on health and economic growth for case of selected SAARC countries by employing panel data for the time span of 1990 to 2022. The result of unit root test exhibits that except education expenditure, which is stationary at level, all other variables are stationary at the 1st difference. Hausman test proposes that fixed effect model (FEM) is suitable for estimations. FEM with a specific cross-section coefficient is also used in the study. The results of FEM reveal that education expenditure, health expenditure, investment and government positively and significantly influence economic growth of selected SAARC countries. Results of Pedroni, Johansen as well as Kao co-integration tests explored long run connections among expenditures on education, expenditures on health and economic growth in selected SAARC countries. Results of Fully Modified Ordinary Least Square and Dynamic Modified Ordinary Least Square and ARDL methods suggest positive as well as significant effect of expenditures on education, health expenditure and investment on economic growth of selected SAARC countries in long run. The results exhibit positive and significant association of education expenditure and health expenditure while positive but insignificant association of investment with economic growth of selected SAARC nations in short run. Findings of the study indicate that increased investment can have crucial effect in enhancing economic growth in selected SAARC nations. The study suggested that advancing human capital through more spending on health and education is essential for economic growth. Enhancing investment in these two areas of human capital should be the highest priority for policy makers in selected SAARC countries.
Financial Repression and Financial Depth: A Case Study of Pakistan
Authors:   Government Graduate College, Okara, Pakistan, Tahir Muhammad Waheed , Hayat Muhammad Azmat ,   Department of Econometrics and Quantitative Methods, University of the Punjab, Lahore,Pakistan.
Published: February 2024

The financial sector assumes a prosminent place in the economic growth. Financial depth, thus, becomes a tool that can be utilized to further the objective of economic growth. But Pakistan has been experiencing those policies that lead to financial repression. So, it becomes a natural question that how the financial repression has been impacting financial depth. The objective of the study is to investigate the impact of financial repression on financial depth. The study contributes by constructing financial repression index for Pakistan. By employing the Autoregressive Distributed Lagged Model (ARDL) to estimate the long run relationship between financial repression and financial depth the study finds positive relationship between financial repression and financial depth. This implies that government intervention like directed credit, enhances financial depth in case of Pakistan. Similarly, the bank density has a positive relationship with financial depth. The government intervention might improve financial sector, particularly, in the presence of lack of competitive market structure is the policy implication.
Adapting to the Digital Revolution: The Transformative Impact of the Fourth Industrial Revolution on Debt Payment
Authors:   Kashmir Institute of Economics, The University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan, Zubair Wajiha , Abbassi Faisal Azeem ,   Kashmir Institute of Economics, The University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan., Jamil Muhammad ,   Kashmir Institute of Economics, The University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan
Published: February 2024

Within the context of the global economy, this research delves into the profound impact of the Fourth Industrial Revolution (4IR) on the dynamics of debt payments. The convergence of Artificial Intelligence (AI), Internet of Things (IoT), and blockchain technology is reshaping how nations approach debt settlements. This study investigates the transformation of international lending and borrowing practices as the 4IR continues to revolutionize trade among developing countries. Employing a comprehensive analysis spanning sixteen years, this paper combines quantitative data on 4IR adoption measures and economic indicators with a qualitative examination of prior research. The investigation explores a significant correlation between the 4IR and foreign debt payments. With the convergence of 4IR technologies, countries can bolster their production competitiveness, stimulate trade volume, and attract foreign investors. Nevertheless, this study also uncovers other aspects related to the 4IR. Rapid technological advancements have exacerbated existing debt inequalities, creating disparities between technologically advanced and less-developed countries.
Double Centroid Approximation
Authors: Pérez Felipe Sergio
Published: February 2024

A Three-body problem approximation via trigonometry
Independent Commissioners, Inventory Intensity, Capital Intensity and Aggressiveness Tax
Authors: Safitri Cindy Eka , Oktaviany Firda Sari , Samosir Refina Tasari , Nurjaman Ulung , Suripto Suripto
Published: February 2024

Study this aims to test the influence of commissioner independence, inventory intensity, and capital intensity against aggressiveness tax. Variables used in the study are commissioner independence, inventory intensity, and capital intensity. At the same time, the variable dependent on research is aggressiveness measured taxes using ETR. A study was carried out on 53 consumer goods industry sector companies on the Indonesian Stock Exchange, using purposive sampling through criteria that have been determined. Data from 16 companies were created as sample studies with observation for the five years 2014 - 2018, so the total observations used are as many as 80 samples. The data used is secondary data reported from the finance annual company consumer goods industry sector for 2014 - 2018. Research uses analysis of multiple linear regression for testing the hypothesis. Research shows that commissioner independence and inventory intensity do not influence aggressiveness tax. In contrast, capital intensity affects positive and significant aggressiveness tax and further commissioner independence, inventory intensity, and capital intensity together with the same influential aggressiveness tax.
Особенности молекулярной и надмолекулярной структуры наночастиц нефтяных асфальтенов
Authors: Доломатов М , Шуткова С , Шарипов Т , Бахтизин Р , Ишниязов З , Нурахметов Т , Салиходжа Ж
Published: February 2024

Исследована надмолекулярная структура кластеров, образованных из молекулярных наночастиц асфальтенов, с применением расчетных и экспериментальных методов. Изучены образцы асфальтенов из термообработанного остатка вакуумной перегонки нефти. Проведены квантово-химические расчеты наночастиц методами молекулярной механики и самосогласованного поля. Изучены нанокластеры, построенные по данным эксперимента и включающие от 2 до 10 молекулярных фрагментов. Установленанепланарность структуры наночастиц асфальтенов. Методами атомно-силовой микроскопии проведено исследование топографии поверхности и расчет структурных параметров молекул асфальтенов. Результаты свидетельствуют о дискообразных надмолекулярных структурах, построенных из ассоциатов молекул асфальтенов.
Групповая скорость и поток электромагнитной энергии в ромбических кристаллах
Authors: Тлеукенов С , Балабеков К , Жалгасбекова З
Published: February 2024

В настоящее время интенсивно изучают среды, обладающие магнитоэлектрическими, пьезомагнитными и магнитострикционными эффектами. При изучении волновых процессов в таких средах, необходимо учитывать анизотропию тензорамагнитной проницемости. Волновые процессы в анизотропных средах имеют качественно иные закономерности в сравнении с изотропными. Наряду с изменением величины фазовой скорости от направления распространения, направления фазовой и групповой скоростей не совпадают. В связи с этим в данной статье рассмотрено распространение электромагнитных волн ТЕ и ТМ поляризации в анизотропной среде ромбической симметрии в координатной плоскости xoz. Определены уравнения индикатрис фазовой, групповой скорости и скоростиVθ . Получено формула для угла между векторами фазовой и групповой скоростей γ . Определено направление групповой скорости в плоскости xoz. Получен вектор потока электромагнитной энергии S~ . Показано совпадение направления потока энергии и групповой скорости. Рассмотрено преломление ТЕ и ТМ волн на границе изотропного полупространстваи анизотропного полупространства ромбической анизотропии. Определены угол преломления и угол полного внутреннего отражения.
Модель термического пика для оценки параметров латентных треков в TiO 2
Authors: Аралбаева Г , Гиниятова Ш
Published: February 2024

Данная работа посвящена изучению радиационных эффектов быстрых тяжелых ионов в веществе. В рамках модели термического пика рассмотрен процессформирования латентных треков в TiO 2 в результате облучения ионами 132Xe с энергией 220 МэВ при разных температурах. В ходе данной работы произведена теоретическая оценка порога образования и размеров латентных треков в зависимости от температуры облучения. Результаты расчетов сравниваются с экспериментальными данными, полученными методом просвечивающей электронной микроскопии. Приводится сравнение и обсуждается вопрос применимости аналитической и неупругой моделей термического пика для описания процесса образования латентных треков.
Расчет электрической проводимости суперионного проводника
Authors: Рахымбеков А
Published: February 2024

Рассмотрена возможность аналитического определения типа проводимости электрического тока твердым оксидным ионным проводником на основе стабилизированной двуокиси циркония (твердый электролит, суперионик) под воздействием электрического поля постоянного тока и высокой температуры в интервале 500 0 -900 0 градусов.Задачи исследования настоящей работы заключаются в математической интерпретации феноменального явления переноса вещества и необратимых изменении в твердом оксидном электролите (или суперионике) кислородной концентрационной ячейки, с смешанной проводимостью электролита. Показана связь с потребностью расширения температурного диапазона применения метода и круга исследуемых керамических материалов. Подтверждается факт ,что образец обладает смешанной проводимостью, обязанной анионам О 2− , катионам Ме + и электронам с отличными от нуля концентрациями n a,k,e , зарядамиq a,k,e и подвижностями в поле электрических сил. Выведена математическая формула для определения подвижности анионов и катионов в твердом оксидном суперионном проводнике на основе стабилизированной двуокиси циркония.
Проводящие и диэлектрические свойства Na 3 Sc 2 (PO 4 ) 3
Authors: Ногай А , Стефанович С , Салиходжа Ж , Ногай А
Published: February 2024

В данной статье изучены проводящие и диэлектрические свойства поликристалла Na 3 Sc 2 (PO 4 ) 3 , который имеет три полиморфные α –, β –, γ – фазы.Уточнены особенности строения кристалла α –Na 3 Sc 2 (PO 4 ) 3 , а также дипольного упорядочения и релаксационной поляризации в α и β –фазах. Возникновение дипольного упорядочения в α – фазе и частичного разупорядочения в β –Na 3 Sc 2 (PO 4 ) 3 , а также высокой ионной проводимости в β –, γ – фазах кристалла Na 3 Cr 2 (PO 4 ) 3 связано фазовыми превращениями α → β , β → γ , приводящими к структурным изменениям ромбоэдрического кристаллического каркаса {[M 2 (PO 4 ) 3 ] 3− } 3∞ . Предложена модель, поясняющая проводящие и диэлектрические свойства Na 3 Sc 2 (PO 4 ) 3 .
Синтез, исследование структуры ИАГ и ИАГГ люминофоров в поле радиации
Authors: Карипбаев Ж , Мусаханов Д , Лисицын В , Голковский М , Лисицына Л , Алпысова Г , Тулегенова А , Акылбеков А , Даулетбекова А , Балабеков К , Козловский А , Усеинов А
Published: February 2024

В настоящей работе предпринята попытка синтеза люминофора с использованием мощных потоков жесткой радиации. Проведены исследования поверхности, элементного состава, структуры и люминесцентные характеристики полученной YAG:Ce керамики. Керамика имеет гетерогенную структуру. Основной фазой полученной керамики является ИАГ, которая составляет от 72 до 91 % от всего объема образцов. Остальной объем образцов составляют фазы Al 2 O 3 и CeO 2 . Синтезированная керамика имеет характерные для ИАГ:Се, ИАГГ:Се люминофоров свойства. Состояние поверхности и элементный состав поверхности образца синтезированной керамики были изучены с использованием сканирующего электронного микроскопа. Рентгеноструктурный анализсинтезированных образцов керамики проводили на дифрактометре. Количественная фазовая зависимость определялась в программе TOPAS-4.2. Приведены результаты измерения спектров люминесценции, измеренных при возбуждении поверхности расколаобразцов.
Моделирование как метод научного познания физико-химических процессов
Authors: Касенов Д , Абуова А , Инербаев Т , Абуова Ф , Каптагай Г
Published: February 2024

В статье рассматривается компьютерное моделирование физических явлений и процессов, являющееся наиболее перспективным направлением использования информационных технологий в физическом образовании.
Современное состояние исследований концентрации радона
Authors: Еримбетова Д , Степаненко В , Видергольд А , Жумадилов К
Published: February 2024

В данной статье представлен обзор работ по изучению концентрации радона в воздухе жилых и служебных помещений, открытом атмосферном воздухе, воде и почве. Отмечена актуальность вопроса внутреннего облучения населения от природных источников ионизирующего излучения. Знание концентрации радона является существенно важным при оценке индивидуальных доз облучения и составлениирадиационной характеристики жилищных помещений населения, особенно в районах с высоким содержанием радионуклидов уранового ряда, что позволит оценить медицинские последствия и своевременно провести комплекс мероприятий по предотвращению облучения населения сверх нормы.
Космологическая модель с фермионным и тахионным полями
Authors: Akhmetova G , Razina O , Tsyba P , Meirbekov B
Published: February 2024

В этой статье обсуждается космологическая модель с фермионным и тахионным полем в четырех измерениях вместе с однородной, изотропной и  плоской вселенной Фридмана-Робертсона-Уокера. Для этой модели найдена система уравнений движения. Описано cтепенное решение для масштабного фактора. Изучены энергетические условия. Полученные параметры удовлетворяют последним наблюдательным данным для α > 1 . Давление в рассматриваемой модели отрицательно и в последнее время стремится к нулю. Найдены энергетические условия, плотность энергии и давление, которые соответствуют темной энергии рассматриваемой модели. Найден параметр уравнения состояния ω , параметр замедления q , параметр рывка j . Построены графики для плотности энергии ρ и давления p , а также для уравнения состояния параметра ω , параметра замедления q и параметра рывка j .
Создание радиационных дефектов в кристаллах MgO, облученных высокоэнергетическими ионами
Authors: Баубекова Г , Лущик А , Асылбаев Р , Акылбеков А
Published: February 2024

Процессы создания анионных дефектов Френкеля были исследованы в кристаллах MgO, облученных быстрыми ионами 132Xe с энергией 0.23 ГэВ при комнатной температуре. Спектры оптического поглощения, измеренные при комнатной температуре в области 1.5-6.5 эВ с использованием двухлучевого спектрофотометра JASCO V-660, содержат несколько полос, приписываемых F + и F-центрам (кислородная вакансия с одним или двумя захваченными электронами соответственно) и простейшим агрегатным F 2 -центрам, а также полосу при 2.16 эВ. Полосы, связанные с примесями железа (около 3 ppm) располагаются около 4.26 и 5.74 эВ. Также были исследованы спектры поглощения кристалла MgO,облученного X-лучами. Спектры катодолюминесценции (КЛ), измеренные при возбуждении электронами с энергией 10 кэВ при 5 К, содержат полосы излучения центров F + и F, максимумы которых расположены при 3.15 и 2.4 эВ соответственно.
Иерархия уравнений ассоциативности WDVV для случая n = 3 и N = 2 при V0 = 0
Authors: Zhadyranova A , Anuarbekova Y
Published: February 2024

В статье исследуются решения иерархии для случая N = 2 , когда V0 = 0 уравнений Виттена-Диджкграфа- Е.Верлинде-Г.Верлинде (ВДВВ). Дано описание нелинейных дифференциальных уравнений в частных производных ассоциативности в 2D топологических теориях поля (для некоторых решений специальноготипа системы Виттена-Диджкграфа-Е.Верлинде-Г.Верлинде (ВДВВ) как интегрируемой недиагонализуемой слабонелинейной однородной системы гидродинамического типа. В статье  рассматриваются нелинейные уравнения третьего порядка для функции f = f(x, t)) двух независимых переменных x,t. Уравнения ассоциативности сводятсяк нелинейным уравнениям третьего порядка для функции f = f(x, t)) , когда потенциал F зависит от метрики η . В работе рассматривается уравнение WDVV для n = 3 случая с антидиагональной метрикой η . Проиллюстрировано решение некоторых случаев иерархии при N = 2 и V0 = 0 уравнений ассоциативности. Для нахождения иерархии уравнения ассоциативности записываются пары Лакса для системы из трех уравнений. С помощью условия совместимости найдены соотношения между матрицами U, V2, V1 . Элементы матрицы V2 выражены через zij и найдены независимые и зависимые переменные матрицы V2 . Также найдены элементы матрицы V1 , выраженныечерез yij и определены независимые и зависимые переменные для матрицы V1 . Принято, что элементы матрицы V0 равны нулю. В физическом приложений решения WDVV описывают пространство модулей топологических конформных теорий поля. В приведенных выше переменных нелинейные уравнения третьего порядка для функции f = f (x,t)) переписаны как новая система из трех уравнений. Найдена связь между элементами at, bt, ct и yijx матрицUt, V1x . Установлено, что только z11, z12, z13 являются независимыми элементами V2 , а остальные элементы могут быть записаны в их терминах. Выраженные переменные at, bt, ct трех уравнений записаны с помощью матричных элементов z12, z13, y12, y13 .
Расчет электронных переходов в кластерах CdS, связанных с кумариновым красителем
Authors: Алдонгаров А , Асильбекова А , Иргибаева И
Published: February 2024

Комплексы нанокристаллических полупроводников с органическими молекулами красителей являются критическими компонентами двух основных типовсолнечных элементов третьего поколения: сенсибилизированные красителем солнечныеэлементы и тонкопленочные ячейки нанокристалла. Эти устройства основываются на эффективном фотоиндуцированном переносе заряда через наноструктурированную органическую-неорганическую границу раздела. Для оценки энергии переноса заряда при фотовозбуждении были рассмотрены молекула кумарина 153 (С153) и его комплексы с кластерами квантовых точек [C153-Cd 4 S 1 ] 6+ и [C153-Cd 13 S 4 ]18+ . Проведены расчет электронного спектра поглощения комплексов "‘квантовая точка - кумарин 153"’ методом время-зависимого функционала плотности TD DFT и анализ молекулярных орбиталей,участвующих в интенсивных переходах. Полученные данные показывают отсутствие интенсивных полос переноса заряда и появление длинноволновых полос, которые указывают на увеличение дипольного момента комплекса.
К вопросу об определении порогового уровня ионизационных потерь энергии образования латентных треков в кристаллическом Si 3 N 4
Authors: Ибраева А , Янсе Ван Вуурен А , Скуратов В , Здоровец М
Published: February 2024

Настоящая работа посвящена определению порогового уровня ионизационных потерь энергии образования латентных треков Set в поликристаллическом нитриде кремния на основе анализа данных по радиационно-стимулированной аморфизации материала. ОбразцыSi 3 N 4 (Al) были облучены ионами Xe с энергиями 167 МэВ и 220 МэВ высокой плотности (6 × 10 14 и 2 × 10 14 см −2 соответственно). На основе ПЭМ анализа структуры этих образцов в геометрии поперечного сечения определена нижняя граница Set на уровне ˜ 6,7 кэВ/нм.
Мир коротких импульсов
Authors: Шварц К. , Даулетбекова А. , Сорокин М.
Published: February 2024

Мир коротких импульсов
The introduction and establishment of dengue disease in a new area: a mini review
Authors:   Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran, Nasirian Hassan
Published: February 2024

Dengue fever virus is a mosquito-borne virus that poses a significant public health threat worldwide. Dengue virus is primarily transmitted by the Aedes mosquitoes, which develop in small man-made containers in urban environments. Climate change and urbanization have contributed to the spread of the Aedes mosquitoes, increasing the risk of dengue virus transmission in densely populated areas. Increasing the transmission of virus by Aedes mosquitoes increases the dengue infection. Additionally, factors such as poor sanitation, low community immunity levels, inadequate waste management and a lack of access to healthcare can also impact the establishment and spread of dengue fever. Globalization, international travel and tourism can introduce the virus to new regions and contribute to its establishment. These factors create ideal conditions for the Aedes mosquitoes to develop and for the dengue virus to establish and spread, posing a significant public health challenge.
Rejection, Current Suffering in the Lives of People with HIV/AIDS: A Qualitative Study in Iran
Authors:   School of Nursing and Midwifery, Iran University of Medical Sciences, Tehran, Iran, Ashghali Farahani Mansoureh , Zareian Armin ,   Department of Health in Disaster & Emergencies, Nursing Faculty, Aja University of Medical Sciences, Tehran, Iran, Khoshbakht-Pishkhani Maryam ,   Medical-Surgical Nursing Department, Shahid Beheshti School of Nursing and Midwifery, Guilan University of Medical Sciences,Rasht,Iran, Khoshtrash Mehrnoosh ,   Nursing Department, Shahid Beheshti School of Nursing and Midwifery, Guilan University of Medical Sciences, Rasht, Iran
Published: February 2024

Background: People with HIV/AIDS face numerous challenges, including the effect of the disease on their personal relationships with family, friends, colleagues, and healthcare professionals. The purpose of this qualitative study was to investigate social interactions among patients with HIV/AIDS. Materials & Methods: This qualitative content analysis study was conducted on 12 patients with HIV/AIDS referring to the Behavioral‌ Disease Counseling Centers of Tehran and Rasht (Iran) in 2018. Semi-structured, face-to-face, and audio-recorded interviews were used to collect data. Purposive sampling with maximum variation was used to select participants. The duration of the interview was between 40 to 75 min. MAXQDA10 software was used for data organization and management, and conventional content analysis was used for data analysis. Results: From the analysis of interviews with 12 individuals with HIV/AIDS (7 men and 5 women), 51 codes were extracted in three categories: disease disclosure (disclosure to important people in life, disclosure to public and health services, and dealing with the challenges of disclosure), social support (impairment in interpersonal relationships and relationships with peers), and acceptance (social acceptance and acceptance by health care providers). Conclusion: Despite significant progress in HIV/AIDS prevention, treatment, and education, the stigma caused by this disease remains high and has a negative impact on the interpersonal relationships of PLWHA with their families, relatives, friends, colleagues, and healthcare providers.
Una mirada a la carrera de Economía a partir de datos sobre la eficiencia terminal
Authors:   Universidad de Guadalajara, García Bátiz María Luisa
Published: February 2024

Una mirada a la carrera de Economía a partir de datos sobre la eficiencia terminal.