bluuebunny/crossref_metadata_2025 huggingface dataset:
SERBEST FORMLU İNCE CİDARLI AA 5083-H111 ALAŞIMININ FREZELENMESİNDE KESME PARAMETRELERİNİN FORM HATASINA ETKİSİNİ ÜÇ BOYUTLU KOORDİNAT ÖLÇME VE LAZER TARAMA İLE KARŞILAŞTIRILMASI
Authors: ÇELİK Uğurcan , ÖZLÜ Barış , DEMİR Halil
Published: December 2022

Bu makale, serbest formlu ince cidarlı AA 5083-H111 alaşımının frezelenmesinde kesme parametrelerinin form hatasına etkisi üç boyutlu koordinat ölçme (CMM) ve lazer tarama (LS) sonuçlarının karşılaştırılmasına odaklanılmıştır. Deneyler Taguchi L32 ortogonal dizisi kullanılarak hazırlanan deney tasarımına göre kaplamasız karbür kesici takım kullanılarak kuru işleme şartlarında CNC dik işleme merkezinde yapıldı. CMM ve LT için form hatalarını etkileyen en önemli kesme parametrelerini belirlemek için varyans analizi (ANOVA) kullanıldı. Deney sonuçlarına göre, CMM ve LT için optimum kesme parametrelerinin 5 mm cidar kalınlığı, 0,05 mm/diş ilerleme miktarı ve 160 m/dk kesme hızı (A2B1C3) olarak belirlenmiştir. ANOVA sonuçlarına göre, CMM ve LT için form hataları üzerine en etkin kesme parametresi sırası ile %56,18 kesme hızı ve %68,06 ilerleme miktarı olmuştur. Ayrıca LT ölçüm sonuçları CMM ölçüm sonuçlarına göre ortalama %63 oranında daha yüksek çıktığı görülmüştür.
FARKLI TANE BOYUTUNA SAHİP ÖĞÜTÜLMÜŞ ATIK MISIR KOÇANININ ALÇI ESASLI KOMPOZİTLERDE DEĞERLENDİRİLMESİ
Authors: TÜRK Mert Sinan , SEVİNÇ Ahmet Hayrullah , DURGUN Muhammed Yasin , URAS Yusuf
Published: December 2022

Bu çalışmada tarımsal bir atık olan mısır koçanının alçı esaslı kompozitlerde kullanımı araştırılmıştır. Mısır koçanları 5,6 mm, 4 mm ve 2 mm olmak üzere 3 farklı boyutta öğütülmüştür. Mısır koçanları hacimce %20, %40 ve %60 oranlarında alçı karışımlarına eklenmiştir. 40x40x160 mm örnekler üretilmiş ve üretilen alçı esaslı kompozitlere birim ağırlık, ultrasonik ses geçiş hızı, su emme, kılcal su emme ve görünür porozite testleri uygulanmıştır. 200x160x20 mm boyutunda plaklar üretilerek örneklerin ısıl iletim katsayıları ölçülmüştür. Mekanik özelliklerinin değerlendirilmesi için ise basınç ve eğilme mukavemeti testleri uygulanmıştır. Mısır koçanı içeren örneklerin birim hacim ağırlıkları azalmıştır. Aynı zamanda ultrasonik ses geçiş hızları da düşmüştür. Görünür porozite değerlerin ise artırmıştır. Buna bağlı olarak örneklerin ısıl iletim katsayılarında da bir düşüş gözlenmiştir, su emme ve kılcal su emme değerleri ise yükselmiştir. Eğilme ve basınç dayanımı değerleri ise düşmüştür. Öğütülmüş mısır koçanının incelmesi görünür porozite değerlerini yükseltmiştir. İncelik arttıkça birim hacim ağırlık ve ultrasonik ses geçiş hızı değerleri azalmıştır. Isıl iletim katsayısı, eğilme ve basınç dayanımı da düşmüştür. Su emme ve kılcal su emme değerleri ise yükselmiştir. Üretilen örnekleri mekanik özellikleri bir miktar zayıflasa da daha hafif ve ısıl iletkenlik katsayısı daha düşük ürünlerin elde edilebilmiş olması, ürünün yalıtım amacı ve bölme elemanı olarak değerlendirilebileceği düşüncesini oluşturmaktadır.
TERMOGRAVİMETRIK ANALİZ İLE FARKLI KÖMÜRLERİN YANMA PROSESİNİN İNCELENMESİ
Authors: NAKTİYOK Jale , ÖZER Abdulkadir
Published: December 2022

Bu çalışmada üç farklı kömürün hava atmosferinde yanma prosesleri termal analiz (TG-DTG/DSC) cihazı ile incelendi. Termogravimetrik analiz deneyleri için 25°C’den 1000°C’ye kadar hava atmosferinde 10°C/dak ısıtma hızında çalışıldı. TG-DTG/DSC verilerinden faydalanarak örneklerin hem ana yanma bölgesi için gerekli olan aktivasyon enerjileri hesaplandı, hem de kendiliğinden ısınma sıcaklıkları belirlendi. Yanma kinetiği için modele bağlı (model fitting) metotlardan olan Ortega metodu uygulandı. Buna göre EK kömürünün ana yanma bölgesine ait olan aktivasyon enerjisi 69.49 kJ/mol, TK kömürünün 86.77 kJ/mol ve YK kömürünün ise 77.34 kJ/mol’ dür. TK ve EK linyitlerinin kendiliğinden ısınma sıcaklıklarının oldukça düşük, YK kömürünün ise oldukça yüksek olduğu belirlendi. EK kömürünün düşük karbon, yüksek kül içeriğinden dolayı diğer kömürlere göre daha düşük tutuşma ve yanma sıcaklıklarına sahip iken YK kömürünün yüksek karbon ve düşük kül içeriğinden dolayı yüksek tutuşma ve yanma sıcaklıklarına sahip olduğu anlaşıldı.
DEMATEL TABANLI TOPSIS YÖNTEMİ VE KÜME KAPSAMA MODELİ İLE AFET LOJİSTİĞİ İÇİN DEPO YERİ SEÇİMİ: EGE BÖLGESİ ÖRNEĞİ
Authors: DERSE Onur
Published: December 2022

Afet lojistiği, gelişen olumsuz doğa olaylarında meydana gelen ihtiyaçların en aza indirilmesi için gerçekleştirilen tüm faaliyetleri (planlama, bilgi akışı, depolama, dağıtım vb.) kapsar. Gerçekleştirilen faaliyetler içerisinde depolama faaliyeti, afet durumundaki hızlı müdahale için kritik bir öneme sahiptir. Bu nedenle afet lojistiği kapsamında ele alınması gereken en önemli problemlerin başında uygun depo yeri seçimi gelir. Çalışmada uygun depo yeri/yerleri belirlemek için iki aşamalı bir yöntem kullanılmaktadır. Çalışmanın ilk aşamasında Çok Kriterli Karar Verme yöntemlerinden DEMATEL yöntemi değerlendirme kriterlerini derecelendirmek için kullanılırken TOPSIS yöntemi DEMATEL yöntemi ile entegre olarak alternatif alanları derecelendirmek için kullanılır. Çalışmada Ege Bölgesi’nde yer alan iller alternatif depo yeri alanları olarak ele alınmaktadır ve bu iller, illerdeki nüfus sayısı, yatırım maliyeti, altyapı durumu ve risk seviyeleri değerlendirme kriterleri ile derecelendirilmektedir. DEMATEL tabanlı TOPSIS yöntemi sonuçlarına göre skor değerleri yüksekten düşüğe doğru sırasıyla İzmir, Aydın, Denizli, Manisa, Uşak, Afyonkarahisar, Kütahya ve Muğla olarak ortaya çıkmaktadır. Çalışmanın ikinci aşamasında DEMATEL tabanlı TOPSIS yöntemi ile entegre olarak Küme Kapsama Modeli geliştirilmektedir. Geliştirilen Küme Kapsama Modeli sonucunda ise Denizli, Muğla ve Balıkesir illerinde kurulum kararları verilmektedir. Çalışmada tüm bölgeyi kapsayacak kurulum kararlarının verilmesi ile gelecekte meydana gelebilecek afet olaylarına müdahalenin hızlandırılmasının sağlanacağı düşünülmektedir.
Genetic predictors of oxidative stress in the indigenous ethnous of the Arctic
Authors: Vorobyeva Nadezda A. , Vorobyeva Alyona I. , Vorontsova Alexandra S.
Published: December 2022

BACKGROUND: Fundamental scientific research and practical medicine indicate that certain genes are potentially involved in the pathogenesis of oxidative stress.
AIM: to determine the prevalence of polymorphic genes that cause oxidative stress in the Nenets ethnic group of the Vaigach Island of the Nenets Autonomous Okrug and compare it with that of other ethnic groups.
MATERIALS AND METHODS: A molecular genetic study of the genes involved in oxidative stress in 44 representatives of the Nenets ethnic group permanently residing on the Vaygach Island was carried out. Data were analyzed using the STATA 2016 program and Microsoft Excel 2010. The assessment of the deviation of genotypic distributions from the HardyWeinberg equilibrium was carried out using the Pearson 2 test. Calculations were performed using the online program HardyWeinberg equilibrium calculator (HWEC).
RESULTS: The prevalence of the main polymorphic variants of the oxidative system genes in the studied ethnic group was similar to that in European populations, with the exception of the SOD2 (rs4880), CYP1A1 (rs1048943), CAT (rs1001179) with prevalences of 97,73%, 20,45%, 13,64%, respectively. The oxidative system genes: the SOD2 (rs4880 and rs1141718), and CAT (rs1001179) were specific to the indigenous ethnic group of Vaygach Island.
CONCLUSION: The study of the nature of genetic diversity in specific geographical, ethnic groups will allow us to reconstruct the genetic history of populations, and identify traces of natural selection associated with adaptive variability.
Evaluation of the effectiveness of technological measures to manage the risk to public health when exposed to atmospheric emissions of multi-fuel combined heat and power plants
Authors: Petrov Sergey B. , Zhernov Yury V.
Published: December 2022

AIM: To assess the effectiveness of technological measures to manage the risk to public health of exposure to atmospheric emissions from multi-fuel combined heat and power plants (CHP).
METHODS: The study involved modeling the dispersion of emissions from the thermal power plants, calculation of surface concentrations, assessment of carcinogenic and non-carcinogenic risks to public health, and estimating the relative risk of mortality, referrals and hospitalizations based on WHO guidelines on atmospheric air quality. Predictive scenarios were constructed for thermal power plants, including the initial state, modernization with the help of technological and sanitary measures, and changes in the structure of the fuel balance.
RESULTS: The use of low-temperature vortex fuel combustion technology in combination with a modernized dust and gas cleaning system significantly (p 0.001) decreased the predicted carcinogenic risk index by an average of 80.67%, non-carcinogenic risk index by 78.84%, and relative mortality risks and referrals to medical organizations by more than 80%. The use of a gas turbine plant increased the production of electric energy by 72.23%, thermal energy by 4.89%, and significantly (p 0.001) reduced the level of carcinogenic risk by 4460%, non-carcinogenic risk by 3547%, and relative risks of mortality, visits to medical organizations and hospitalizations by 3364%.
CONCLUSION: The use of the best available technologies to modernize multi-fuel CHP plants significantly reduces the level of risk to public health while it increases the production of electric and thermal energy and maintaining the advantage of using both solid and gaseous fuels.
Role of microelements in the development of endocrine pathology
Authors: Sharipova Maisiyat M. , Ivkina Mariia V. , Arkhangelskaya Anna N. , Gurevich Konstantin G.
Published: December 2022

Due to the continual increase in the incidence of endocrine diseases in the world, their prevention and treatment have become topical. Diseases of the endocrine system are often accompanied by the development of comorbidities and complications, which negatively affect the quality of life and survival of patients. Currently, research is focused on the status of trace elements in patients with various diseases. Numerous current studies are devoted to investigating the influence of the balance of trace elements on the etiology and pathogenesis of diabetes mellitus, obesity, and some thyroid diseases, including autoimmune ones. The role of iodine, selenium, iron, zinc, and copper in the development and progression of these diseases has been established, but the findings of these studies are sometimes contradictory.
This review focuses on national and foreign studies on the role of trace elements in the development of endocrine pathology, and gives a brief description of the most significant mineral substances, as well as the effect of their imbalance on the structure and function of the organs of the endocrine system. This review recommends further studies on this issue incorporating concomitant diseases, as well as the mutual influences of mineral substances on each other, which can lead to a change in the concentration of trace elements in the body.
Understanding Reward Compensation
Authors:   , Dallal Diane H. , Forman Evan M
Published: December 2022

More than 160 million American adults are overweight or obese. A critical maintaining factor of overweight/obesity is repeated instances of overconsumption of highly caloric, rewarding foods. Existing behavioral weight loss treatments have sub-optimal outcomes, suggesting they do not adequately target a maintaining factor of overconsumption. One maintaining factor may be individual differences in reward responsivity to highly pleasurable, calorically dense food in relation to non-food stimuli. Related research from the addiction literature indicates that individuals with substance use disorders experience a simultaneous state of reward deficit (i.e., low self-reported and neural responsivity to natural rewards) and high reward responsivity to drug cues. These factors appear to interact and lead individuals to engage in greater substance use over time, in order to compensate for a growing deficit for natural rewards. This phenomenon of reward compensation has several theoretical parallels to individuals with overweight/obesity and is posited to contribute to obesity maintenance. However, while there is strong evidence that reward responsivity to food cues is high in those with overweight/obesity, there is a dearth of research examining reward deficit for non-food stimuli, particularly with ecologically valid assessment approaches. The present study was the first to investigate reward deficit in individuals with overweight/obesity in relation to those with normal BMIs. Using a multimodal approach (i.e., retrospective recall and prospective experience sampling), this observational study assessed 86 undergraduates' daily activities, the perceived pleasure derived from each, and frequency of rewarding food consumption over the course of one week. General linear models revealed that individuals at higher BMIs reported retrospectively higher reward deficit (b=-.16, SEb=.06, p=.02) but prospectively lower reward deficit (b=.74, SEb=.30, p=.01), suggesting greater complexity than previously theorized to how individuals with overweight/obesity experience natural rewards compared to models of addiction. Meanwhile, the interaction between non-food and food reward responsivity on BMI and consumption was weak and nonsignificant multimodally, indicating that the reward compensation model of obesity maintenance was not supported. Additional research with more representative samples is needed to further investigate the reward compensation model, and to examine alternative explanatory models, that may maintain overconsumption over time.
Running surface, ground contact time, and other biomechanical factors that may affect Achilles tendon forces during running
Authors:   , Aubol Kevin Gregory , Milner Clare E.
Published: December 2022

High Achilles tendon loads are thought to play a role in the etiology of Achilles tendon injuries. Avoiding soft surfaces and increasing ground contact time are strategies that may reduce peak Achilles tendon loads during running. This study's purpose was to identify changes that can be made to reduce Achilles tendon forces during running. Thirty rearfoot strike runners ran outdoors on grass and concrete while Achilles tendon forces were measured. Participants ran with preferred, low, and high ground contact times, and with fixed and free cadences. Peak Achilles tendon force, estimated cumulative Achilles tendon damage, and Achilles tendon impulse were compared. Peak Achilles tendon force and estimated cumulative Achilles tendon damage were higher while running on concrete than grass, but differences were small. There was no difference in Achilles tendon impulse while running on grass and concrete. Peak Achilles tendon force and estimated cumulative Achilles tendon damage decreased as ground contact time increased. There were no differences between the fixed and free cadence conditions. Participants made these changes with minimal practice and without the use of a metronome. Therefore, increasing ground contact time is a viable intervention to reduce Achilles tendon forces. A secondary data analysis of an existing data set identified additional factors that contribute to high Achilles tendon forces during running. Participants with high and low peak Achilles tendon forces were identified. Sagittal plane ankle, knee, and hip angles, anterior/posterior center of pressure position, and two-dimensional sagittal plane resultant ground reaction force waveforms were analyzed using principal components analysis. Principal components were entered into a discriminant analysis to identify gait features that distinguished between the groups. Runners with high peak Achilles tendon forces had greater center of pressure velocities at the beginning of stance, more dorsiflexion excursion during midstance, and higher ground reaction forces throughout stance. In conclusion, Achilles tendon forces were similar while running on grass and concrete. Increasing ground contact time decreased Achilles tendon forces during running. We also identified gait features that contribute to high Achilles tendon forces. These findings may lead to new interventions for runners at risk of Achilles tendon injuries.
Effect of College Students' Awareness of Respect for Life, Awareness of Bioethics, and Policy Support related to Abortion on Abortion Awareness
Authors:   Research Institute For Life And Culture Sogang University, Kim Kyung-ah
Published: December 2022

This study was conducted to determine the effects of college students' awareness of respect for life, bioethics, support for abortion-related policies, and demographic characteristics (major, grade, religion, sexual attitude, sexual intercourse) on abortion awareness. For this purpose, an online survey was conducted from December 10, 2021 to January 30, 2022, targeting 116 students attending universities in Incheon, Chungnam, Chungbuk, and Gyeongbuk. With the SPSS 23.0 program, the degree of respect for life, bioethics, support for abortion-related policy, and awareness of abortion were analyzed by t-test and ANOVA according to demographic characteristics and post-test by Sdheffe. The correlation between demographic characteristics, respect for life, bioethics, support for abortion-related policy and awareness of abortion was analyzed by Pierce correlation analysis, and factors affecting the perception of abortion were analyzed by multiple regression analysis. Abortion awareness according to demographic characteristics showed significant differences according to major, grade, religion, sexual knowledge acquisition path, sexual attitude, and sexual experience. Awareness of respect for life, consciousness of bioethics, major, religion, and sexual attitude showed a quantitative correlation with abortion awareness, and abortion-related policy support, grade and sexual experience showed negative correlation with abortion awareness. It was found that the factor influencing the awareness of abortion was the awareness of bioethics, and it was found to account for 49.1% of the variance in the perception of abortion. Based on the research results, various education and methods should be explored to strengthen the awareness of bioethics in order to prevent abortion among university students.
Gender Gaps in STEM Occupations in Costa Rica, El Salvador and Mexico
Authors: Cuberes David , Saravia Florencia , Teignier Marc
Published: December 2022

This paper documents the existence of significant gender gaps in STEM occupations in Costa Rica, El Salvador, and Mexico and estimates the aggregate costs associated with these gaps in Mexico. For Mexico we calibrate and simulate a version of the general equilibrium occupational choice model of Hsieh et al. (2019) to estimate the output losses associated with these differences since 1992. We find that if barriers in STEM occupations were eliminated aggregate output would have been between 1% and 10% larger, depending on the year. If female-specific social norms were also eliminated, the rise in aggregate output would be between 1.4% and 14%. For comparison purposes, we also compute the gains of eliminating all the distortions in high-skilled occupations as well as in all occupations. We find that aggregate output would rise between 16.5% and 3.6% in the first case and between 36.7% and 12% in the latter.
Seguridad alimentaria en Centroamérica, Panamá, República Dominicana, México y Haití: panorama y respuestas de la seguridad alimentaria en la región
Authors: Deza María Cecilia , Ruiz-Arranz Marta , López Arnoldo , Jiménez Melanie , Eggers Prieto Carlos , Vega Pablo , Sibaja Josué , Barrios Juan José , Gasteazoro Alejandro , Prat Jordi , Coj-Sam Jorge , Giles Álvarez Laura , Jean-Baptiste Nerlyne , Andino Ana , Pacheco Medina Eduardo Camilo , Filippo Agustín , Jiménez Miguel Ángel , Escobar Julia , Orozco Gabriela , Garcimartín Carlos , Rodríguez Rubilú , López Juan Carlos , Zentner Joaquín
Published: December 2022

La pandemia del Covid-19 inició una escalada inflacionaria global que el conflicto entre Rusia y Ucrania ha exacerbado, presionando al alza los precios internacionales de los insumos energéticos y de alimentos básicos de los que los países de Centroamérica, Panamá, República Dominicana (CAPARD), México y Haití dependen. Este escenario representa un riesgo para la seguridad alimentaria de la región. En 2022 se espera que el porcentaje de hogares con ingreso inferior al costo de la canasta básica alimentaria se incremente en más de 5 puntos porcentuales con respecto a 2019, afectando desproporcionadamente a las mujeres, trabajadores informales y poblaciones rurales. Para paliar estos efectos, los gobiernos han reaccionado con medidas de política que en promedio representan un costo fiscal de 1,2% del PIB. Proyecciones recientes apuntan a un escenario global de bajo crecimiento y persistente inflación, con precios de alimentos y energía todavía por encima de niveles pre-pandemia. Ello se suma a otros riesgos que enfrenta la región, en particular la vulnerabilidad a los desastres naturales y los efectos del cambio climático. Para enfrentar estos retos, se requieren acciones de corto y largo plazo para garantizar el acceso y el abastecimiento sostenido de alimentos de adecuada calidad. Este estudio, además de ofrecer un panorama de la seguridad alimentaria en la región, reporta las respuestas de política de los países y propone recomendaciones de corto plazo y largo plazo para gestionar una posible emergencia alimentaria y evitar crisis futuras.
Connexa: No. 16: Diciembre, 2022: Síntesis de información y datos sobre integración y comercio
Authors:   Instituto para la Integración de América Latina y el Caribe
Published: December 2022

Luego del buen desempeño del comercio global y de América Latina y el Caribe (ALC) en 2022, la paulatina normalización de los costos de fletes marítimos y del intercambio de servicios, el pronóstico para 2023 indica una consolidación de la desaceleración que se viene observando desde el segundo trimestre del año. En el marco del debilitamiento del crecimiento económico mundial, el endurecimiento de la política monetaria en diferentes regiones del mundo y el racionamiento energético en Europa, entre otros, se proyecta para 2023 una ralentización de la demanda por las exportaciones de ALC, con un impacto heterogéneo según subregiones.
Impacto del COVID-19 en los sistemas financieros de los países andinos: lecciones aprendidas y desafíos hacia adelante
Authors: Andrian Leandro Gaston , Mejía Luis Fernando
Published: December 2022

Desde que comenzó la pandemia del COVID-19 se han presentado importantes efectos negativos en materia sanitaria y económica. Los países de la Comunidad Andina, Bolivia, Colombia, Ecuador y Perú, no fueron la excepción a este gran impacto global. En este difícil contexto, una de las preocupaciones esenciales de los hacedores de política fue la de evitar un colapso del crédito bancario que pudiera amplificar los efectos negativos de la crisis, por ejemplo, a través de cierres innecesarios de empresas que, frente al aumento generalizado en la percepción de riesgo crediticio, no habrían podido acceder a líneas de financiamiento para su capital de trabajo. Como respuesta a la posibilidad de este escenario adverso, los países de la CAN implementaron una serie de medidas que permitieron que el canal del crédito continuara fluyendo de forma relativamente exitosa, a través de garantías públicas para líneas de crédito privado, así como el relajamiento temporal de las normas crediticias y de calidad de cartera. Los sistemas de crédito de la CAN tenían una solidez importante antes del choque del COVID-19, lo que evitó la materialización de riesgos sistémicos y permitió que las medidas de política fueran exitosas en evitar un colapso del crédito bancario. El análisis revela, que las medidas de política implementadas permitieron mantener el flujo de crédito en tres de los cuatros países, evitar deterioros en la calidad de cartera, y mantener la relación de solvencia patrimonial. Sin embargo, como era de esperarse, la rentabilidad disminuyó sustancialmente. Los resultados indican que, los indicadores de calidad de cartera se deterioraron más allá de lo que indicaban los datos, con diferencias sustanciales entre el cálculo contrafactual y el dato observado en los casos de Bolivia y Colombia. Es decir, las medidas de política implementadas permitieron que el sistema financiero no colapsara, pero los indicadores de calidad de la cartera se relajaron pudiendo no reflejar la salud del sistema financiero de acuerdo con los estándares prepandemia.
Analysis of the influence of lubricant supply conditions on the pressure distribution in squeeze-film dampers
Authors: Novikov D. K. , Shliandina N. S.
Published: December 2022

One of the most common ways to reduce vibration in aircraft engines is the use of damping devices. Squeeze-film dampers are the dampers most widely used in aircraft engine designs. The efficiency of squeeze-film dampers is determined by their damping capacity which depends, among other parameters, on the static pressure of oil supply to the damper. This article proposes a method for calculating the static pressure in the feed groove of a hydrodynamic damper depending on the geometric size of the end gap and the value of the lubricant supply pressure. The parameters influencing the static pressure in the damper end gap are determined. Calculations are performed for different values of a hydrodynamic damper end gap, the number and diameter of the supply ports. All calculations presented in the article were performed for a short squeeze-film damper with end gaps and throttles. For comparison of parameters, the dynamic pressure was also calculated for a long squeeze-film damper. It was shown that the size of the end gap has the strongest impact on the pressure in the groove of a squeeze-film damper. It was also shown that the dynamic pressure in the gap may be significantly higher than the static pressure of supply, and failure of the lubricating film may result. In addition, it was also shown that the size of the damper end clearance affects the lubricant flow through the damper.
Dynamic tasks in models of product operability
Authors: Ragutkin A. V.
Published: December 2022

When developing models of critical mechanical engineering products, it is necessary to solve dynamic problems, taking into account changes in the dimension chains of links in the process of functioning of mechanisms. A method of calculating dynamic dimension chains as applied to solving direct and inverse problems is proposed. The solution of a direct problem is given under the condition that the stray field of the master link includes the errors of production and those related to the changes in the dimensions of the initial links under the action of operational loads. To obtain the value of the product part wear rate we propose using empirical dependences of the relation between the wear rate and formation of hydrogen in the process of interaction of materials.
Procedure of assessing the error of the device for measuring mass-centering and inertial characteristics of nanosatellites using reference objects
Authors: Vasin P. V. , Barinova E. V.
Published: December 2022

In this paper, we solve the problem of experimental determination of the accuracy of a device for measuring mass-centering and inertial characteristics of nanosatellites which was developed at Samara University and based on the principle of inverted torsional pendulum. A procedure for determining the measurement error of the inertia tensor components and the center-of-mass coordinates using reference objects is proposed. For this purpose, a reference composite object of variable configuration was developed and produced in the form of a CubeSat 3U nanosatellite. With the help of this standard, a modified method of conducting an experiment was developed, which allows reducing the influence of errors in the manufacture of the device and its tooling on the measurement accuracy by averaging the homogeneous quantities. The article presents the results of a series of experiments to determine the errors in measuring mass-centering and inertial characteristics of a reference composite object of three variants of assembly. This series of experiments confirmed the measurement error theoretically calculated and stated in the technical documentation for the device. In addition, the accuracy of the electronic optical sensor installed on the device was evaluated and it was found that the influence of environmental factors on its operation is insignificant and can be neglected. The results of this work can be used to determine the error of measuring the center-of-mass coordinates and the inertia tensor components of a CubeSat 1U-3U nanosatellite at the pre-launch testing stage.
Mathematical modeling of the evolution of a tribosystem in the process of formation of equilibrium roughness of a frictional contact
Authors: Kolesnikov I. V. , Koropets P. A. , Manturov D. S. , Shakhmatov Ye. V.
Published: December 2022

As the science of friction developed, tribologists showed that reliable operation of friction units is determined by the wear resistance of the surface layer, its ability to adapt to changing operating conditions. In this regard, there is a need not only to create structures on the surfaces of friction units that have the properties of self-regulation and self-organization, but also to monitor changes in the characteristics of the surface layer. This article presents an innovative methodology for monitoring the life cycle of surface layers coated by vacuum ion-plasma treatment. In this paper, we propose a dynamic model based on the hypothesis that roughness is both a factor that excites mechanical vibrations and a consequence of these vibrations, whereas roughness changes as a result of wear under the influence of local dynamic forces. It is shown that a friction pair is a nonlinear system with complex feedbacks. Its stationary motion can be considered as a strange attractor. The randomness of motion in the vicinity of the limit cycle is due to the presence of a link of constant delay with rigid positive feedback in the model. As a result, there is constant reconfiguration of the amplitude and phase of the oscillations.
An algorithm for organizing long volatility trading based on a delta-neutral strategy
Authors: Plotnikov Arkadiy P. , Shishlov Roman A. , Arsenov Vladimir V.
Published: December 2022

The article is devoted to the problem of automation of long volatility trading in the financial market using delta-neutral trading strategies. Most operations on them, as a rule, are performed manually, which makes them less systematic and vulnerable to the negative influence of the human factor (emotions, tardiness of actions, erroneous submission of applications, etc.). To solve this problem, the article proposes a unified algorithm for a delta-neutral strategy, taking into account several parameters for long volatility trading through transactions with futures on underlying assets and options on these futures. For greater clarity, the algorithm is supplemented with a diagram made in BPMN 2.0 notation.
REVIEW OF AN OFFICIAL OPPONENT ON THE THESIS OF SERGEY IVANOVICH PAKANICH «RIGHT OF UNDER AGED CONVICTED ON PERSONAL SECURITY AND ITS ENSURING AT PERFORMANCE OF CUSTODIAL SENTENCE» presented on the competition for a science degree of the Candidate of
Authors: Adoevskay O. A.
Published: December 2022

The review is devoted to the thesis of S.I. Pakanich, wheretopical issues of improvement of the mechanism of realization ofthe rights of the convicted on personal security in juvenilecorrectional facilities.
RELATIONSHIP AND PROSPECTS OF DEVELOPMENT OF THE JUDICIAL PRECEDENT AND JUDICIAL PRACTICE AS THE SOURCES OF RUSSIAN LAW
Authors: Glukhov A. S.
Published: December 2022

We consider the relationship between the concepts judicial precedent and judicial practice as well as the possibility of recognition of judicial precedent and judicial practice as the official sources of Russian law.
CONCEPT OF THE INSURANCE CONTRACT IN THE PRE-REVOLUTIONARY, SOVIET AND RUSSIAN LAW
Authors: Sokol P. V.
Published: December 2022

The article views the concept of the insurance contract in the

draft of the Civil Code of 1905, in the Civil Codes of the RSFSR

of 1922, 1964 and modern Civil Code of the Russian Federation.

The characteristic of the insurance contract is carried out, the

form of the contract is considered.
ON THE ISSUE OF SIGNING TENANCY AGREEMENT
Authors: Kryukova E. S.
Published: December 2022

The article deals with problems associated with the qualification

of relations arising between the owner of the state and municipal

housing and citizens using residential premises in the fund, but

not having proper documentation confirming the legality of their

rights to housing.
EXTENSION OF GENERAL AND SPECIAL RULES OF THE LABOUR CODE ON THE HEAD OF AN ORGANIZATION
Authors: Malinina L. Yu.
Published: December 2022

In the present article on the basis of analysis of provisions of

the Labour Code of the Russian Federation the conclusion on

regulation of the rights and duties of the head of an organization

by unity and differentiation of legal regulation of relations in the

sphere of work is drawn. Separate precepts of law which extend to

all workers, including the head of an organization, and organizations

which are specially provided for the head are considered. In the

article the attention is especially paid on the questions of the

maximum term of the employment contract of the head of an

organization, on establishment of the size of the severance pay,

compensation in cases of termination of the employment contract

with the head of an organization, about distribution on the head

of an organization of the guarantees and privileges determined by

the Labor Code of the Russian Federation for all workers.
RECUSATION OF A LAWYER AT SPECIAL PROCEDURE OF PROCEEDING AND CRIMINAL PROCEDURE
Authors: Taran A. S.
Published: December 2022

In the article the procedure of recusation of a lawyer during the

production of procedure and criminal proceedings according to

special procedure, in particular during the stage of execution of a

sentence is investigated. Some defects of legal regulation of recusation

applying to the designated forms of criminal procedure are identified,

the conclusion about the necessity of improvement of the institute

of recusation in the analyzed part is made.
UNIFICATION OF LEGAL NORMS AS A PREREQUISITE OF FORMATION OF A SINGLE SET OF PROCEEDINGS
Authors: Borchenko V. A. , Kretova E. A.
Published: December 2022

Analysis of procedural norms of the current legislation given in

the article allows to make a conclusion about the incipient tendencies

of their unification. The harmonization of the rules in turn can be

considered as a prerequisite for the formation of a single set of

proceedings.
SOME PROBLEMATIC ASPECTS OF PRE-TRIAL STAGE OF CRIMINAL PROCEEDINGS
Authors: Loshkarev V. V.
Published: December 2022

The results of supervisory activities for the reception, registration,

reports of crimes permission of the Russian Interior Ministry

indicate a demand gaps in the legislative regulation of pre-trial

stage of the criminal process, including with regard to the powers

of the prosecutor.
TRUST OF POPULATION TO THE JUDICIAL POWER
Authors: Razveikina N. A.
Published: December 2022

The article concerns on the issue of public trust in the judiciary

power, its complex nature is emphasized because of the

multidimensional nature of the very phenomenon of trust. The

function of trust as a socio-psychological phenomenon in the

relations between state structures and civil society members is

defined. It is proposed to use an interdisciplinary approach to the

study and development of trust in the broad masses in the judiciary

power, it has been suggested the need to implement this task at

the national level.
A Performance Study on Heat Transfer Using Different Heat Sink by Experimentation and Optimization Method
Authors: Sushma S. , Chandrashekar T. K. , Nagesh S. B. , Naresh H.
Published: December 2022

With the advancement of new technologies, the reductions of size are more in recent electronic devices, which lead to an increase in heat dissipation. Thus, the problem of electronic cooling has become a critical issue in this area. This work is based on the experimental and optimization analysis. The results from the experimental analysis are compared for different shaped heat sinks like concave and congruent made up of copper and aluminium respectively. The experiment is conducted for different heat input and the performance of the heat sink is observed. Results shows that the heat transfer coefficient is more and thermal resistance is less with concave shaped heat sink and this study on experimental performance of different shaped heat sink manifests its application in electronic devices.
Effect of Process Parameters on Tensile Behaviour of FSW AA 6061-AA 7075 Reinforced with TiO2 Particles Using Statistical Approach
Authors: Mahendra K. C. , Sreenivasa C. G. , Anil Kumar H. M. , Algur Veerabhadrappa
Published: December 2022

Joining of dissimilar materials especially aluminium alloys through friction stir welding approach has been effectively carried out in different experimentations resulting in enhanced mechanical properties and meeting various application sectors. Process parameter plays an exceptional influence on the joint properties and determines the mechanical characterization. Here the objective is to investigate the AA6061 and AA 7075 reinforced with titanium dioxide (TiO2) nanoparticles using Taguchi and ANOVA methods considering pin profile, welding speed, tool rotational speed, and tilt angle utilizing this process. TiO2 powder was added at the weld juncture. All the specimens were welded subjected to various levels of operating conditions of the process parameters and further processed for tensile evaluation. Result shows that the most significant parameters are the tilt angle and pin profile for ultimate tensile strength.
Study of Electrical and Magnetic Properties of Zn-Co-Ferrite Nanocomposites
Authors: Santhosh Kumar R. , . Rashmi , Lalithamba H. S.
Published: December 2022

The ferromagnetic material exhibits better magnetic properties as compared to other magnetic materials. Cobalt and ferrites have superior soft magnetic properties such as high permeability and magnetic susceptibility. A nanocomposite is prepared using Zinc, Cobalt and Ferrite by combustion synthesis method and the composition is Fe0.5Co0.25Zn0.25. The morphological properties are studied using FESEM images and XRD. The electrical and magnetic properties are studied from 10 Hz to 8 MHz frequency range using LCR meter at ambient temperature. The results show that with increase in frequency, the resistivity as well as permeability decreases. The values of electrical resistivity and dielectric constant suggest the suitability of the nanocomposites in power electronics devices.
Successfully Implementing Technical and Vocational Education and Training Programmes in Secondary Schools
Authors: Mitchell Brendan , Buntic Clare Gordon
Published: December 2022

Technical and vocational education and training (TVET) plays a critical role in developing essential labour market skills. While the original goal of TVET, which is still prominent today, was to prepare youth to enter the workforce by training them to be work ready, the global technological revolution and innovations in science and technology demands higher levels of education and technological skills for the 21st century. TVET has evolved to meet the needs of industry and countries. Strengthening technical and vocational education at the secondary education level provides a wider transformational vision for students to have the opportunity to gain these skills. There are challenges, which are more prevalent in some countries than others. For example, perception and participation in TVET has traditionally been stigmatized in favour of white-collar jobs. Additional challenges include contemporary curriculum and facilities, training and development of staff, and financial strains, which many developing nations have. This article sets out to provide information and guidance on the implementation of TVET programmes and focuses on: strong or emerging global TVET practice, with a focus on the secondary school sector; key features of successful practice, in order to extract the most relevant lessons; and the most common global challenges in developing successful TVET programmes, and how these can be addressed. While the article focuses on secondary education it contextualises this within the wider TVET and vocational education systems.
A Survey of Aquatic Macrophytes in the Akassa Axis of the River Nun, Niger Delta, Nigeria
Authors: AH Gijo , KJ Alagoa
Published: December 2022

An ecological study was conducted to measure the diversity of aquatic macrophytes and nutrient levels of the River Nun estuary around Akassa, Niger Delta, Nigeria. This was done to ascertain the current ecological status of the estuary and gauge the ecological health of the water body as a result of anthropogenic additions into the water body. Macrophye and Subsurface samples were collected from three sampling points on the estuary. Macrophyte samples were identified using standard keys while water samples were investigated for pH, Salinity, Nitrates, Phosphates, and Sulphates. Result from the study reveals the presence of 17 species of aquatic macrophytes from 8 families. All nutrient parameters were within the permissible levels. There is no significant difference (P>0.05) in pH, salinity and sulphate between stations. There is a significant difference (P<0.05) in nitrate and phosphate between stations. The diversity of macrophytes was also uniformly high in all stations. The preponderance of macrophytes in this study agrees with the aphorism that marine ecosystems contain a high diversity of living organisms. The River Nun is therefore not under any immediate ecological threat.
Obeziteye Yatkın Genç Erişkinlerde Aort Elastisite Parametrelerinin Ekokardiyografik Değerlendirilmesi
Authors: GÜRSOY Erol , GÜRSOY Bengül , ADIGÖZELZADE Samir , RREKA Ardi , KÖKLÜ Mustafa , YÜKSEL Uygar Çağdaş , ÇELIK Murat
Published: December 2022

Amaç: Arter sertliği damar duvarının viskoelastik özelliklerini yansıtır. Bu çalışmada obez ve obeziteye yatkın genç erişkinlerde aort strain, elastikiyet, sertlik ve sol ventrikül fonksiyonları arasındaki ilişkiyi değerlendirmeyi amaçladık. Gereç ve Yöntemler: Katılımcılar VKİ'ye göre obez, fazla kilolu, normal kilolu ve zayıf olarak sınıflandırıldı. 28 zayıf, 84 normal, 89 fazla kilolu ve 22 obez birey vardı. Hastaların fizik muayeneleri, bulguları ve tıbbi öyküleri kaydedildi. Sol ve sağ ventrikül fonksiyonları 2D transtorasik ekokardiyografi ile değerlendirildi. Aortik strain, elastikiyet ve sertlik indeksini içeren aort elastikiyet parametreleri, önceden tanımlanmış formüle göre hesaplandı. Bulgular: Temel klinik ve demografik bulgular, yaş ve ağırlık dışında benzerdi. Ekokardiyografik ölçümlerin karşılaştırılmasında, sol ventrikül sistol sonu ve diyastol sonu çapları, interventriküler septum ve arka duvar diyastol çapları, sol atriyum çapı, sol ventrikül kitle ve kitle indeksi, VKİ'deki artışla uyumlu olarak gruplar arasında anlamlı olarak yüksekti, mitral erken diyastolik dolum hızları, mitral erken ve geç diyastolik dolum hızı oranı ve mitral lateral erken diyastolik gevşeme, VKİ'deki artışın tersine, gruplar arasında anlamlı olarak daha düşüktü (tümü için p < 0.05). Aortik strain, elastikiyet ve sertlik değerleri açısından gruplar arasında istatistiksel olarak anlamlı farklılıklar gözlendi. Aortik sertlik, VKİ'deki artışla uyumlu olarak gruplar arasında anlamlı olarak daha yüksekti, aort strain ve elastikiyeti, VKİ'deki artışa zıt olarak gruplar arasında anlamlı olarak daha düşüktü (tümü için p < 0.05). VKİ, sistolik kan basıncı, nabız basıncı ve miyokardiyal performans indeksi (MPI), aort sertliği indeksini (β) etkileyen bağımsız değişkenler olarak bulundu. Sonuç: Gelecekteki kardiyovasküler hastalık riskini belirlemede prognostik bir değeri olabilecek aort sertliği indeksi (β), obez ve obeziteye yatkın genç erişkinlerde artma eğilimindedir ve VKİ, sistolik kan basıncı ve sol ventrikül MPI ile korele olduğu gözlenmiştir.
Evaluation of Biocontrol Agents and Fungicides against Alternaria Leaf Spot of Spinach
Authors: Jangid Akash , Shringi Anshuman , Chakma Mini , Srivastava Seweta , Rana Meenakshi
Published: December 2022

Background: Spinach (Spinacia oleracea) is a worldwide cultivated crop and is attacked by a complex of foliar diseases. Alternaria leaf spot has become quite a problem as it results in poor quality and low yield. Methods: The experiment was conducted during 2021-22 with a total of four fungicides viz Carbendazim 12% + Mancozeb 63% WP, Hexaconazole 5% SC, Azoxystrobin 18.2% + Difenoconazole 12.5% W/V, Copper oxychloride 50% and three bio-control agents viz. Trichoderma viride, Trichoderma asperellum, Trichoderma harzianum to evaluate their effectiveness against Alternaria leaf spot of spinach. Fungicides were evaluated at four concentrations viz 25, 50, 75 and 100 ppm for their efficacy. Result: All the tested chemicals and bioagents were effective to reduce the disease severity, but hexaconazole at 100 ppm was the most effective in controlling the radial growth (82.55% inhibition) followed by Azoxystrobin (79.97%). The study established the efficacy of fungicides and bio-agents against Alternaria leaf spot of spinach caused by Alternaria alternata. The levels of inhibition revealed the potential to manage pathogen and can be used for better yield and good quality product thereby minimizing risks of crop failures.
The effect of energy drink and supplement food consumption on children and youths
Authors: Sacan Selvinaz , Adibelli Derya
Published: December 2022

In recent years children and youths begin to consume energy drinks and defined as a supplement food that vitamins, protein, plant, plant and animal products in our country and around the world. Children and youths perceived these products as harmless because of selling in markets, internet and herbalists, the lack of age limit for buyer, missing information in media as well as the impact of popular culture. Even some parents’ unconscious behavior such as have their children consumed energy drinks because of especially developed for the attention of their children increases the rate of consumption of these products. However random and excess consumption of these products threaten the health seriously. Although there were studies about this subject in international literature, there were no studies about this subject in our country. Unconscious consumptions of energy drinks and food supplements impact on children and youths should be determined with interventional studies by researchers.
Keywords: Energy drink, supplement food, protein, child, youth
The effects of web-based language learning on university students' translation proficiency
Authors: Muftah Muneera
Published: December 2022

Web-based language learning materials have been among the preferred materials to be used by English language instructors since they are plentiful, straightforwardly accessed, user-friendly, and most importantly, are provided for free. This study investigates the effects of learning the simple perfect tense translation in three different English translation classes which applied three different modes of teaching, which were the traditional face-to-face method, integrative method, and web-based learning method. Furthermore, it is aimed to examine the effects of proficiency level in each mode of teaching and also to determine the best method for learning translation. The research is a quantitative study and the design is a pre-and post-test quasi-experimental design. The pretest-posttest study involved 87, third-year undergraduate students, that is 52 advanced and 35 intermediate students. All groups were exposed to one mode of teaching only for 4 weeks. The results indicated that there is a significant difference in both tests for all modes used.

Keywords: Web-based language learning, translation proficiency, traditional method, integrative method, web-based learning method;