bluuebunny/crossref_metadata_2025 huggingface dataset:
Conventional sintering of copper powder with and without addition of different weight percentage of aluminium powder
Authors: Devaraj S. , Chandra Mohan H. K. , Narayana Swamy K.S. , Ranganatha R.
Published: April 2022

Cu-Al powder for different weight percentages of 5, 10 and 15 was ball milled for 30 min. The compacts of pure Cu, Cu- 5 wt.% Al, Cu-10 wt.% Al and Cu-15 wt.% Al was compacted using metallic die by applying 70 kN force. The compacts were kept in a heat treatment electrical resistance furnace at 600oC for 8hr for conventional sintering. The conventional sintered compacts were tested to measure the behaviour of the alloy. The density of the sintered compact of Cu, Cu-5 wt.% Al, Cu-10 wt.% Al and Cu-15 wt.% Al were calculated using water displacement method. The surface topography of the sintered compacts were analysed using optical metallurgical microscope for the magnifications of 100x. The microstructure of the copper is exhibited cellular structure. The quantity of the secondary phase increases with increasing Al content. The hardness values of respective compacts were measured using Wilson micro Vickers hardness testing machine. The micro Vickers hardness values of Cu, Cu-5 wt.% Al, Cu-10 wt.% Al and Cu-15 wt. % Al were measured as 38.78 ± 1.2, 21.22 ± 2.0, 24.54 ± 3.7 and 39.44 ± 3.5 HV1 respectively. The compression strength of the sintered compacts of pure copper, copper with 5, 10 and 15 wt.% Al were determined using universal testing machine. The compression strength of Cu-15 wt.% Al is higher than copper and other sintered Cu-Al compacts.
Performance and emissions characteristics of biodiesel in diesel engine
Authors: Deepak Kumar T. , Venkatesha B. K. , Sameer Hussain Syed , Ramesha D. K.
Published: April 2022

The climate and fuel supply have been problematic emphasis on alternative fuels for combustion engines. Different research studies tested various alternative fuels. In this connection, biodiesel is the most promising diesel fuel based on a literature survey. In this paper, the prospects and potential for the use of biodiesel and increasing biodieseldiesel blending are studied by a fixed compression ratio, Optimum blending and enhanced performance engine parameter and pollution control should be proposed based on experiments. Experiments for a set compression ratio (17:1) undertaken utilising biodiesel cotton seed oil (CSME) diesel blends, i.e. B0, B10, B20, B30, without full loading rates, compared to the base cases (e.g. diesel engine fuel). The parameters may evaluate the fuel consumption and thermal efficiency of the brakes, Unburned hydrocarbons, and nitrogen oxides in emission of carbon monoxide. The results concluded that, B20 (20% biodiesel and 80% diesel) is the most efficient compared to other mixtures.
Mechanical and wear behaviour of flyash reinforced epoxy composites
Authors: Hanumantharaya R. , Prem Kumar B. G. , Ajith B. S.
Published: April 2022

In this research, a flyash/epoxy composite was fabricated using conventional hand layup method. The mechanical and tribological behaviour of composite was investigated by changing the volume of flyash to 5, 10 and 15% vol. The mechanical properties such as compression strength, hardness, impact strength and tensile strengths were determined as per ASTM standards. Results reveal that the mechanical properties, such as density, tensile strength and the compression strength increased as the amount of flyash increased up to a critical point, decreased with further increment in percentage of flyash. Tribological results reveal that, when the percentage of flyash is increased there is a significant decrease in wear volume loss. The minimum wear loss is observed at the optimum values for loads 15N, speed 300rpm and distance is 300m.
Effect of beryl and graphene nano platelets reinforcements on the wear behaviour of AL7075- beryl graphene particulate hybrid nano composites
Authors: Patil Shanawaz , Pasha A. A. , Nagaral Madeva , Raju B. S. , Manjunath L.H.
Published: April 2022

The effect of beryl particles and graphene nano platelets (GNPs) on the wear behaviour of Al7075-beryl-graphene hybrid composites has been studied. The hybrid composites were developed containing Al7075 matrix as matrix materials and 6 weight percentage of beryl and varying 0.5 to 2 weight percentage of graphene by using novel two step stir casting technique and wear behaviour of the newly developed hybrid composites were studied. The dry sliding wear studies conducted using a pin-on-disc tribo-tester under atmospheric conditions revealed that the wear loss of Al7075-beryl-graphene hybrid composites are lower than that of the matrix Al7075 alloy and further with increasing weight percentage of graphene decreased the wear loss of the hybrid composites. The wear studies also showed that the increase in load, sliding speed and sliding distance, the wear loss of the composites increased. The microstructure of the worn out surface revealed that a huge amount of plastic deformation appeared on the unreinforced Al7075 alloy when compared to the reinforced hybrid composites. The incorporation of beryl and graphene into Al7075 showed worn out surface that is not smooth and grooves, scratches and parallel lines were observed. The addition of beryl and GNPs into the matrix reduces erosion and small grooves like structure were noticed in the hybrid composites which leads to a reduction in wear in Al7075-beryl-GNPs hybrid composites
Enhancing the performance of preheated B20 vegetable seed oil by varying the compression ratio and using cerium oxide as a stabilizer
Authors: O Abhilash , M S Rajgopal , KM Mrityunjayaswamy , Y P Ravitej
Published: April 2022

The main purpose of the present investigation is to effectively utilize the biofuel along with cerium oxide as a stabilizer powered with a single-cylinder variable compressible ratio diesel engine fuelled with the 20% (blend B20) waste vegetable seed biofuel (WVO). Ethylbased esters production process from neutralized WVO is optimized by sodium hydroxide (NaOH) single-phase reaction to enhance the production of the biofuel. B20 WVO biodiesel behaviour is tested in a diesel engine by varying the compression ratio 16 and 18. Compression ratio 16 had better thermal efficiency and less COx and NOx emission when compared to compression ratio 18. 250 bar injection pressure and 19 injection timing were found to have better fuel efficiency and emission characteristics. The influence of cerium oxide as a stabilizer in both the engine performance and the produced emissions was evaluated. From the result, it is observed that the increase in injection pressure from 210 bar to 250 bar leads to an increase in brake thermal efficiency by 6.1%, mechanical efficiency increases by 4.4%, and a decrease in brake specific fuel consumption by 5.7%. The CO and HC emission decreases by 3.9% and 3.2% respectively then retarding the injection timing.
Modelling and structural analysis of bicycle frame using FEA for different materials
Authors: . Mahadev , Gowda Narasimhe , D Pavan , B K Venkatesha
Published: April 2022

In the latest years, because of the immoderate exploitation and growing use of petroleum for energy, present day industries and transportations are contributing to the direction of emission of exhaust gases including CO2 and inflicting international warming. Bicycle is very environmentally friendly, safe, and efficient way of conveyance among the man powered vehicles and are a form of exercise with many other applications and advantages, the bicycle industries are promoting them as green products. The frame is the main component in a bicycle to support the external loads acting on it. As all the important accessories are mounted on the frame, different kinds of masses along with weight of rider, braking force, and the response from floor are immediately transferred to it. The frame needs to be strong, stiff, and lighter in weight, that is acquired through combining extraordinary substances and optimizing its structures. In this paper, the static, dynamic and fatigue evaluation of a bicycle frame is achieved to decide the life of frame, deformation, stresses, and von-misses stress appearing at the frame under loading circumstances for different materials. The frame modelling carried using CATIA V5R20 and simulation performed by ANSYS 19.0 Workbench software. From the analysis it is found that for all the cases the maximum stress is less than yield strength of selected materials, so the design is safe.
A study on the applications of vibratory motor for material handling vehicles
Authors: Raghu T S , H M Pruthvi , M Kalyana Kumar , B P Madhu
Published: April 2022

This work aims at improving the efficiency and safety of the tipper trucks while in action. This project focused on performing a detailed analysis of the performance, safety, and cost aspects of the present techniques of achieving that. The pros and cons of incorporating a vibrator for the tipper truck are studied. This involved extensive FEA analysis in the preliminary stage. The structural, vibrational, and fatigue analysis is done for the critical components which helped in deciding the feasibility of incorporating such a mechanism. The critical components for the analysis are the base of the truck body, trunnion, brackets for mounting the telescopic cylinder, and the vibratory motor. The CAD models are prepared according to the industry standards and analyses are performed. Random data for forced vibration is generated, which is used to perform analyses on the components in FEA. Experimentation on a scaled-down model is also conducted to get the real-time data for the system. A vibration sensor would be incorporated using Arduino, and the acceleration data of vibration are recorded and compared by the theoretical values. A comparative study for the stability analysis is done, with and without the vibrator. A detailed report for the change in stroke length, pump pressure/flow requirement, etc. is formed and compared. The improvement in efficiency of dumping, time-saving and various other parameters is also considered. The cost aspect of rolling this system in the market is also studied.
Investigation on thermal stability and adhesion property of chitosan based biodegradable composite
Authors: K P Prashanth , L Yuvaraj , B K Venkatesha , S Sanman , Hanumantharaju H G , N Venkatesh
Published: April 2022

Developing a biodegradable polymer composite by using chitosan as matrix and natural fiber as reinforcement plays a vital role in order to increase mechanical properties. Chitosan has been exploited for its mucoadhesvie property which has tremendous biomedical applications in order to explore the mechanical and thermal capability. This study initialized with manufacturing of chitosan-based composite with three different natural fibers namely banana, coir, and sisal. The results of the incorporation of natural fibers with chitosan on the strength of composite blends were investigated. Further the prepared sample undergone Thermo gravimetric analysis and peel test to evaluate their thermal stability and adhesive property. The results indicate that the chitosan improves the thermal property of composites, whereas the increasing percentage of chitosan in peel test sample gets saturated hence the adhesive property gets deteriorate.
Performance evaluation of mining equipment in surface coal mine using reliability analysis
Authors: N.S. Harish Kumar. , John Rahul P. , R Prem Chand , S.G Sujith Kumar , Murthy Narasimha , T Siddesh.
Published: April 2022

This article deals with reliability analysis of mining equipment such as shovels and dumper in a surface coal mine at The Singareni Collieries Co. Ltd., Telangana, by using the RBD and Markov model. First, the method is to obtain the MTBF and failure rate of the individual subsystem of a shovel and each dumper using RBD. Second, the attribute of the reliability-based Markov model is dissected. The method is shown to be an effective technique to obtain the reliability of the whole system of shovel and dumper during the working period. Then, the mathematical model has written to obtain the reliability of the whole system of the shovel and the dumper is described along with its validation. The outcome shows that the reliability with a time of the entire framework is the unwavering quality incorporated of subsystems and can be treated as a factor for the optimized process of availability of the same.
Investigation on mechanical properties of aluminium 8090 alloy through room temperature rolling
Authors: S Harsha , S M Dasharath
Published: April 2022

Al-Li alloys are attractive for military and aerospace applications because their properties are superior to those of conventional Al alloys. Their exceptional properties are attributed to the addition of Li into the Al matrix. To develop an improved approach in achieving an excellent combination of high strength and ductility, the solutionized Al-Cu-Li plates were subjected to rolling at room temperatures to a reduction of 60%, 75% and amp; 85%. Rolling at room temperature produces a high density of dislocations because of the suppression of dynamic recovery, such high density of T1 precipitates enable effective dislocation pinning, leading to an increase in strength and ductility. The tensile properties of the age hardening Al 8090 alloy subjected to room temperature rolling (RTR) were investigated. The rolled and aged alloys were analyzed by using TEM, Vickers hardness analysis and tensile test as per ASTM standards. The strength and ductility of Al 8090 alloy of rolled samples are compared to unrolled samples.
Modern cast/splint for external physical injuries and rehabilitation
Authors: M V Ashwini , Poovanna Sachit , P Robinson
Published: April 2022

Physical injuries has always been a part of human life and development throughout the evolution of mankind. To accomplish certain physical tasks, there has always been some physical exertion by the human body which, over the long run, can result in internal physical injuries like muscle tears, ligament tears, hairline cracks in bones, etc. External physical injuries are a common thing of the past, present and will be for the foreseeable future. These injuries can happen to anyone at any given point of time and can leave some people in a state of inactivity for several months on end. The purpose of the multi-purpose cast is that it will be designed to minimize the work put into the recovery process while constantly providing immobilization, compression, heat treatment and airflow, simultaneously, to the injured body part from the earliest stages of injury, which can potentially reduce time taken to recover from an injury.
Performance and emission characteristics of a diesel engine using biodiesel blended with nano additives
Authors: Deepak Kumar T. , Narayanaswamy K. M. , Dhananjaya D. A. , Ramesha D. K.
Published: April 2022

Economic uncertainty, price escalation and depletion levels of fossil fuels increases the day-to-day need to look for alternative fuel to meet the world’s energy needs. Biodiesel provides the best choice for energy in new world. Biodiesel can be a diesel fuel replacement. In this research, Biodiesel is made with the combination of cottonseed oil and diesel. To stabilize biodiesel and boost its properties, nano particles are added to improve fuel quality. In this study, Silicon oxide is mixed with biodiesel, evaluated and compared to existing diesel with its engine performance, and emission characteristics. Cottonseed oil biodiesel blends improved in properties high calorific value fuel attainment and elimination of toxic exhaust emission forming to the atmosphere by added silicon oxide nano particle promising technique for biodiesel/diesel use.
Biomechanics of human knee joint under dynamic conditions
Authors: Khot Sachin , Guttal Ravi , Babannavar Ojas P.
Published: April 2022

Incorporation of numerical methods to analyze the biomechanical behaviour of a human knee joint is the conventional practice. The biological joint simulation studies require incorporating the material, and geometric non-linearities while developing a numerical model. In case of biological joint dynamic analysis, the preprocessing of Finite Element models will be a challenging job and needs huge computational requirements. As the biological tissues are highly non-linear, obviously the researchers face difficulties in handling material and geometric nonlinearities. The aim of this study is to evaluate the contact mechanics behaviour of a human knee joint under various loading conditions. This study explores contact parameters in line with contact mechanics approach, which deals with frictional stresses at the contact interfaces of the knee joint, identifying the failure prone zones in the corresponding soft tissues, and modal response of the knee joint. This study provides the biomechanical characteristics of a human knee joint contact interactions that can be used as a surrogate models in complex dynamic simulations.
Evaluation of copper chill on tribological behaviour of LM13/ZrSiO4/C hybrid metal matrix composites
Authors: Ravitej Y. P. , Mohan C. B. , Ananthaprasad M. G.
Published: April 2022

Composites place a vital role in applications of material science I,e aerospace, automobile, marine, etc... Dual reinforcement composites are a trending research area in the field of metal matrix composites. In this research article dual reinforcement i.e zirconium silicate and carbon are added to molten LM13 using the stir casting process in terms of (3+3), (6+3), (9+3) and (12+3) wt.% respectively using copper as a chill kept toward one end. Tensile, hardness, and microstructural studies are done on the composite specimen at the chill end and non-chill. It is found an increase in reinforcement and chilling effect increases the properties of the composite.
Optimization of cutting parameters to improve power consumption and material removal rate in high efficiency milling
Authors: Mohamed Noor Rizal , Izham Ramli Muhammad , Faiz Zubair Ahmad , Rahman Hemdi Abdul , Kataraki Pramodkumar
Published: April 2022

This study is an attempt to obtain a suitable combination of the milling parameters to optimize electrical power and material removal rate (MRR) in slot milling of aluminium 6061. Machining parameters of radial depth of cut (RDOC), feedrate (Fr) and axial depth of cut (ADOC) are optimized using high efficiency milling cutting strategy. The results are analyzed through response surface and ANOVA for power and MRR. Response surface optimization shows that the optimized results are RDOC=48.8 mm, Fr=3000 mm/min, ADOC=6mm. The error between the predicted and the confirmation results is 4.3%.
Performance and NOx emissions of Mahua ester blends with pyrogallol antioxidant in a single cylinder diesel engine
Authors: Balaji S. , Kapilan Natesan , Srikanth H. V.
Published: April 2022

Biodiesel has attracted research because of its environmental benefits and energy security. In this research, the suitability of using Mahua B20 biodiesel blend in a single cylinder diesel engine has been carried out. The performance characteristics such as brake specific fuel consumption, brake thermal efficiency and NOx exhaust emissions of B20 Mahua biodiesel with pyrogallol antioxidant by changing its concentration from 0 ppm to 750 ppm is examined and compared to regular diesel. The engine performance results reveals that minor improvements in brake specific fuel consumption and brake thermal efficiency is observed with considerable reduction in NOx emission at an optimum 750 ppm antioxidant concentration in comparison with B20 Mahua blend without antioxidant. Thus, Mahua B20 blend with antioxidant can be used to run diesel engine without any modification.
TANIMA VE YANLIŞ TANIMA: KAPSAYICI EĞİTİM, OKULLAR VE ETNİSİTE
Authors: ÇELİK Çetin
Published: April 2022

Eğitim eşitsizlikleri literatürü, akademik başarıyla aile kaynaklarının ve kültürel değerlerin ilişkisini uzun süredir vurgulamaktadır. Okulun, bu ilişkiye etkisine dair literatür ise son on yıllarda hızlı bir gelişme göstermektedir. Bu çalışma okulların yapı ve işleyişinin eğitim süreçlerine etkilerine kurumsal habitus kavramıyla odaklanmaktadır. Çalışma Bremen ve İstanbul’da bulunan ve çoğunluk toplumundan farklı etnik ve dilsel özellikteki öğrencilerine farklı eğitim programları uygulayan iki okulun eğitim süreçlerini nasıl şekillendirdiğini nitel verilerle incelemektedir. Elde edilen bulgular Bremen’deki okulun öğrencilerin kültürel kimliklerini tanıyarak ve akademik gelişmeyi hedefleyerek ev ile okul arasındaki geçişliliği kolaylaştırdığını, İstanbul’daki okulun ise öğrencilerin kültürel kimliklerini tanımayarak ev ile okul arasındaki mesafeyi dışlayıcı şekilde açtığını ortaya koymaktadır.
Jak rozumieć turystykę przyrodniczą? Studium przypadku młodzieży akademickiej
Authors: Graja-Zwolińska Sylwia , Spychała Aleksandra
Published: April 2022

Turystyka przyrodnicza z jednej strony stanowi w ostatnich latach istotną część światowego przemysłu turystycznego, z drugiej nastręcza badaczom wielu problemów w definiowaniu samego zjawiska. Czy jego wyznacznikiem winno być miejsce realizacji aktywności turystycznej czy dominujący motyw jej uprawiania? Czy w świetle teorii, jak i praktyki w ogóle istnieje potrzeba porządkowania tej terminologii? Autorki artykułu podjęły próbę „dyskusji” z literaturą zarówno zagraniczną, jak i krajową, a następnie starały się poznać rozumienie analizowanego terminu wśród studentów poznańskiej uczelni, szczególnie związanej ze środowiskiem przyrodniczym. Artykuł należy traktować jako przyczynek do dalszych rozważań i analiz w kontekście teoretycznym i praktycznym.
Finis coronat opus? O zakończeniach artykułów literaturoznawczych
Authors: Chyła Karolina , Garczarek Krzysztof , Poręba Izabela
Published: April 2022

Niniejszy szkic stanowi próbę namysłu nad zagadnieniem rzadko dotąd obecnym w kręgu polskiej refleksji filologicznej. Skupiamy w nim uwagę na zakończeniach 18 wybranych artykułów literaturoznawczych. Właśnie w konkluzjach, jako mających zwieńczyć bądź streścić wywód i zakorzenić tekst w pamięci odbiorców, twórcy poradników i opracowań dotyczących dyskursu naukowego dostrzegają znaczenie fundamentalne. To przeświadczenie zdają się podzielać sami uczeni, obierający przy tworzeniu finałów różne strategie. W tekstach publikowanych od 2015 do 2019 r. wyodrębniamy tego typu strategii około 15: od apologii wybranego pisarstwa po propozycje dalszych ścieżek rozwoju konkretnych badań, od efektownej puenty po cytat z pracy, którą stworzył poprzednik. Jak ujawnia nasza analiza, podsumowanie tekstu naukowego nie jest jedynie miejscem wykorzystania konwencjonalnych retorycznych zabiegów. Staje się też przyczynkiem do zrozumienia roli przypisywanej własnej twórczości przez badaczy/badaczki literatury.
Poetic Cycles and Information Beyond the Micro-Level of Words: On the Translations of Joseph Brodsky's Cycle A Part of Speech Into English and Latvian
Authors: Veckrācis Jānis
Published: April 2022

A poetic cycle is a specific case of poetic contextualisation and for translators this means additional efforts in identifying the micro- and macro-level network of functional and semantic links. Joseph Brodsky’s cycle A Part of Speech represents a highly conceptual approach and strong integration of each and every poem. In this context the paper briefly outlines different types of micro- and macroscopic approaches to poetry translation. Further practical analysis of some translation issues observed in the respective English and Latvian translations show that decisions of poetry translators are informed by different backgrounds in the author-text-reader relationships. Artistic creativity is certainly present in the translation activity but this does not mean that a completely independent target text is produced.
Franciszek Jaworski (1873–1914) – pierwszy historiograf biżuterii polskiej
Authors: Letkiewicz Ewa
Published: April 2022

Artykuł dotyczy postaci lwowskiego historyka, antykwariusza, kolekcjonera, dziennikarza, publicysty Franciszka Jaworskiego (1873–1914). Jego prace poświęcone polskim pierścieniom historycznym z lat 1911–1913 są pierwszymi, które dokumentują te przedmioty, pochodzące z końca XVIII stulecia i z wieku XIX.

Zwłaszcza praca o pierścieniach powstała w 1913 roku wywarła znaczący wpływ na późniejsze piśmiennictwo poświęcone polskiej biżuterii. Jej autor był pierwszym badaczem postrzegającym pierścień jako ważny obiekt historyczny, dokument kultury minionych czasów, na pozór tylko przedmiot drobny, pozbawiony znaczenia.

Zabytki zebrane w pracy Pierścienie historyczne polskie podzielił Jaworski na grupy uporządkowane chronologicznie. Cztery najstarsze pierścienie odnosiły się do schyłku Rzeczypospolitej, a pozostałe 114 wiązały się z osobami i wydarzeniami XIX wieku (ostatni z pierścieni pochodził z 1894 roku).

Typologia pierścieni wprowadzona przez Franciszka Jaworskiego stała się ważna dla późniejszych systematyzacji polskiej biżuterii. Choć była to grupa dzieł przygodnie przez niego zebranych, stała się dla kolejnych generacji podstawą do wyodrębnienia nowej kategorii biżuterii, znanej dziś jako „biżuteria patriotyczna”. Z tego powodu Franciszka Jaworskiego należy traktować jako pierwszego ich historiografa, który swoim opracowaniem zwrócił uwagę na potrzebę badań na tym nierozpoznanym polu.
ИЗУЧЕНИЕ ПРОБЛЕМЫ ПОТЕРИ УСТОЙЧИВОСТИ ПОПЕРЕЧНОГО СЕЧЕНИЯ МАГИСТРАЛЬНЫХ ГАЗОПРОВОДОВ В ЗАЩИТНЫХ ФУТЛЯРАХ ПОД АВТОМОБИЛЬНЫМИ И ЖЕЛЕЗНЫМИ ДОРОГАМИ В РЕЗУЛЬТАТЕ УВЕЛИЧЕНИЯ ОБЪЕМА ЗАМЕРЗАЮЩЕЙ ВОДЫ В МЕЖТРУБНОМ ПРОСТРАНСТВЕ
Authors: Тарасов Владимир Алексеевич , Султанмагомедов Тимур Султанмагомедович , Султанмагомедов Султанмагомед Магомедтагирович
Published: April 2022

Ссылка для цитирования: Тарасов В.А., Султанмагомедов Т.С., Султанмагомедов  С.М. Изучение проблемы потери устойчивости поперечного сечения магистральных газопроводов в защитных футлярах под автомобильными и железными дорогами в результате увеличения объема замерзающей воды в межтрубном пространстве // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2022. – Т. 333. – № 4. – С. 93-104.

Актуальность исследования обусловлена необходимостью снижения риска аварий на переходах магистральных газопроводов, проложенных в защитных футлярах под автомобильными и железными дорогами – одних из наиболее опасных и ответственных участков. Лед, образовавшийся в межтрубном пространстве при наличии сезонно промерзающих и оттаивающих грунтов или при перекачке газа при отрицательной температуре совместно с некачественной установкой торцевых уплотнений, может привести к смятию поперечного сечения газопровода, тем самым повышая риск аварии на данном участке. Проводимые исследования позволят заранее изучить потенциально уязвимые участки переходов с помощью компьютерного моделирования и предусматривать для них комплекс защитных мер. Цель: оценка возможности повреждения магистральных газопроводов, проложенных в защитных футлярах, льдом, который образовался в межтрубном пространстве; обоснование дополнительных мер и рекомендаций, направленных на обеспечение безопасной эксплуатации подземных переходов магистральных газопроводов под автомобильными и железными дорогами. Объекты: участки магистральных газопроводов, проложенные в защитных футлярах под автомобильными и железными дорогами в условиях сезонно оттаивающего и промерзающего грунта вблизи защитного футляра или транспортирующие газ при отрицательной температуре. Методы: математическое моделирование, моделирование методом конечных элементов, методы строительной механики и сопротивления материалов, планирование эксперимента. Результаты. Определена возможность повреждения магистральных газопроводов, проложенных в защитных футлярах, льдом, который образовался в межтрубном пространстве; предложена математическая модель определения давления, возникающего в межтрубном пространстве вследствие увеличения объема замерзающей воды, и проверена ее адекватность с использованием программного комплекса ANSYS на примере газопровода 219×6 мм и защитного футляра 325×12 мм; обозначены рекомендации для вновь проектируемых газопроводов и их переходов, а также для уже существующих.
НОВЫЕ РЕЗУЛЬТАТЫ КОМПЛЕКСНОГО ЛИТОЛОГО-ФАЦИАЛЬНОГО И БИОСТРАТИГРАФИЧЕСКОГО ИЗУЧЕНИЯ ОСИНСКОГО ГОРИЗОНТА НИЖНЕГО КЕМБРИЯ ЮГА CИБИРСКОЙ ПЛАТФОРМЫ (СКВАЖИНЫ ЗАПАДНО-ЯРАКТИНСКИЕ 45, 361)
Authors: Токарев Дмитрий Александрович , Плюснин Алексей Владимирович , Терлеев Александр Анатольевич
Published: April 2022

Ссылка для цитирования: Токарев Д.А., Плюснин А.В., Терлеев А.А. Новые результаты комплексного литолого-фациального и биостратиграфического изучения осинского горизонта нижнего Кембрия юга Cибирской платформы (скважины Западно-Ярактинские 45, 361) // Известия Томского политехнического университета. Инжиниринг георесурсов. – 2022. – Т. 333. – № 4. – С. 157-167.

Актуальность. Геологоразведочные работы, проводимые в последнее время по всей Лено-Тунгусской нефтегазоносной провинции, делают исследования карбонатов осинской подсвиты особенно актуальными, поскольку они позволяют установить закономерности образования ловушек углеводородов. Цель исследования – изучение осевой и склонной части крупного Ичединско-Большетирского барьерного рифа на юге Непско-Ботуобинской антеклизы. Объекты: карбонатные породы Ичединско-Большетирского барьерного рифа, средней (осинской) подсвиты усольской свиты томмотского яруса нижнего кембрия, вскрытые скважинами № 45 и 361 Западно-Ярактинской площади. Методы: комплекс ГИС, детальное литолого-седиментологическое описание 90 и 33 м керна соответственно, секвенс-стратиграфический анализ, петрографический анализ 120 образцов и изучение палеонтологических остатков, отобранных из керна скважин Западно-Ярактинской площади. Результаты. Были выделены семь литологических типов пород, закономерно сменяющие друг друга по разрезу. Накопление пород осинского пласта происходило в следующем диапазоне фациальных обстановок (по направлению от бассейна осадконакопления к континенту): верхняя сублитораль, литораль, супралитораль (себха). Образование карста происходило в субаэральных условиях. Проведенный биостратиграфический анализ подтверждает нижнекембрийский возраст. В скважине № 45 обнаружены остатки известковых водорослей Renalcis polymorphum, Renalcis levis, Botomaella zelenovii, Epiphyton zonatum, Epiphyton celsum, Epiphyton scapulum, Chabakovia ramosa, Chabakovia nodosa, а также мелкораковинная фауна Namacalathus sp. В скважине № 361 были обнаружены и определены известковые водоросли Renalcis polymorphum, Renalcis granosus, Renalcis sp., Renalcis levis, Renalcis seriata, Korilophyton sp., Chabakovia sp. и мелкораковинная фауна (SSF) рода Namacalathus sp. В разрезе подсвиты выделены три секвенса четвертого порядка. Границы секвенса фиксируют субаэральные перерывы, представленные в керне седиментационной брекчией, зонами карста. Наибольшее по амплитуде и продолжительности понижение уровня моря приурочено к границе второго и третьего секвенса. Известковые водоросли, изученные из керна скважин, являлись основными рифостроителями раннекембрийских органогенных построек. Для этих организмов характерны небольшие глубины литорали – сублиторали, что хорошо согласуется с результатами проведенного литолого-фациального исследования.
INFLUENCE OF THE OXIDIZER ON THE FORMATION AND PURIFICATION EFFICIENCY OF ACID GASES PRODUCED DURING ASPHALTENE GASIFICATION
Authors: Ермолаев Денис Васильевич , Даминов Айрат Заудатович
Published: April 2022

Link for citation: Ermolaev D.V., Daminov A.Z. Influence of the oxidizer on the formation and purification efficiency of acid gases produced during asphaltene gasification. Bulletin of the Tomsk Polytechnic University. Geo Аssets Engineering, 2022, vol. 333, no. 4, рр. 215-223. In Rus.

The relevance of the study is determined by the need to understand the influence of the oxidizer on the formation of acid gases (CO2, H2S, COS and CS2) during thermal decomposition of high-viscosity hydrocarbons. This is important for predicting the purification efficiency of the produced gasification products and estimating the economic costs. The aim: using the simulation to study the effect of an oxidizer in the form of steam on the composition and properties of asphaltene gasification products obtained from natural bitumen, as well as to determine the cleaning efficiency depending on the amount of steam and the absorbent based on NaOH water-alkaline solution. Object: asphaltene of natural bitumen of Ashalchinskoe field of the Tatarstan Republic (Russia), oxidizer in the form of steam, the value of which varied from 0,1 to 1 depending on the amount of asphaltene. Methods: simulation of asphaltene gasification and acid gas absorption taking into account influence of an oxidizer in a form of steam with regard for basic chemical kinetics, ultimate analysis and TGA. Simulation results of gasification and absorption showed that steam used as an oxidizer during asphaltene gasification has a significant influence on the composition and properties of gasification products, as well as on the purification of syngas. With the increase of steam, a parabolic dependence of the concentrations of syngas components is observed, which values decrease with time, except for CO2. The calorific value of syngas decreases from 11,3 to 7,2 MJ/m3 and the cold gas efficiency increases from 53,4 to 62,5 % due to growth of syngas yield. As the amount of steam increases, the amount of absorbent decreases and the purification efficiency of acid gases rises. Thus, the amount of absorbed CO2 increases by 20,7 % while the absorbent decreases by 6,7%. At the same time the amount of absorbed H2S increased by 0,39 % with decrease of NaOH by 40,9 %.
Hacia la diacronía de una forma de tratamiento en el español: su merced
Authors: Granda Germán de
Published: April 2022

El artículo no presenta resumen.
Instrumentos lingüísticos académicos y norma estándar del español: la nueva política lingüística panhispánica
Authors: Lauria Daniela , López García María
Published: April 2022

El contexto de globalización económica y de integraciones regionales impulsó una renovación de los instrumentos lingüísticos académicos. Esta renovación vino de la mano de un aparente cambio en el interés político y teórico de la Real Academia Española capaz de representar el estatuto de lengua internacional del español. En el presente artículo examinamos los discursos que la Academia elaboró en los últimos años con el fin de convalidar sus instrumentos normativos. Para ello, analizamos la Nueva política lingüística panhispánica,documento que expresa las principales líneas de esta nueva política sobre el español, el Diccionario panhispánico de dudas y la Prepublicación de la Nueva Gramática de la Lengua Española en tanto manifestaciones concretas de dicha política. Concluimos que la nueva política lingüística panhispánicaresulta ser más una operación discursiva que otra cosa. En efecto, lejos de fomentar una distribución equitativa y multilateral de las funciones en la estructura organizativa, continúan reproduciéndose las antiguas jerarquíasen la toma de decisiones, sosteniendo una clara centralización en los procesos de estandarización en el mundo hispánico. -- The context of the economical globalization and the regional integration has promoted a renovation of the linguistic devices used by the Royal Academy of the Spanish Language. This renovation came along with an apparent turn in the political and theoretical interests of the Academy —institution that iscapable of representing the statute of Spanish as an international language. In this article, we examine the discourses that the Academy devised in the last few years in order to validate their normative devices. In that sense,we analyze the Nueva política lingüística panhispánica —document that depicts the principal outlines of this new policy regarding Spanish—, and the Diccionario panhispánico de dudas and the Prepublicación de la Nueva Gramática de la Lengua Española as concrete manifestations of that policy.We conclude that the new Panhispanic language policy turns out to be more a discursive operation rather than anything else. Indeed, instead of endorsing an equitable and multilateral distribution of the functions of the organizational structure, they continue to reproduce ancient hierarchies in the decision making, supporting that way a clear centralization of thestandardization in the Hispanic world.
Elección léxica y significación social en una situación de contacto de lenguas: el español de Puno (Perú)
Authors: Godenzzi Juan Carlos
Published: April 2022

La nota no presenta resumen.
Don Quijote, el escribidor y el escritor
Authors: Pollarolo Giovanna
Published: April 2022

En sus diversos estudios críticos, Mario Vargas Llosa ha mostrado un especial interés en reflexionar sobre la teoría novelística de Miguel de Cervantes en función de sus propias preocupaciones como estudioso y novelista. Basta leer el ensayo “Una novela para el siglo XXI” que escribió en 2005 como introducción para la edición del Quijote con motivo de la celebración del IV Centenario, para constatar que Vargas Llosa “lee” a Cervantes en función de sus propias reflexiones sobre la teoría de la novela, el fanatismo o la “locura” de los personajes, la ficción y sus relaciones con la “realidad”, las voces narrativas o el problema del narrador. Pero la relación de Mario Vargas Llosa con Cervantes va más allá del ámbito teó-rico o reflexivo y se manifiesta en la propia creación novelística tal como ocurre, específicamente, en La tía Julia y el escribidor. En ese sentido, el objetivo principal de este trabajo es analizar el “diálogo” que se establece en La tía Julia y el escribidor con el Quijote a partir de la “locura” de Pedro Camacho, el escribidor de radionovelas creado por Vargas Llosa, y sus semejanzas con la del caballero andante.
El centro en lo múltiple (Selección de ensayos)
Authors: González-Alcázar Felipe
Published: April 2022

El artículo no presenta resumen
El género poemático del blasón bajo el signo de Darío: artes poéticas de aves, naturalezas nativas y voces únicas en dos poetas peruanos
Authors: Iparraguirre Alexis
Published: April 2022

El artículo explica las peculiaridades del género poemático denominado blasón que emplea Rubén Darío en el poema del mismo nombre. Muestra que la noción de blasón que asume Darío introduce modificaciones sensibles al género, que originalmente implica el elogio de un escudo, y lo emplea, más bien, como un arte poética. Así, en los poemas titulados“Blasón” de José Santos Chocano y José María Eguren, siguiendo a Darío, deviene en la expresión de un programa estético a través de tres imágenes recurrentes: la de un ave y/o la de la denominada “naturaleza americana”y/o de la voz poética, que se declara de una singularidad acérrima.
Garatea Grau, Carlos. Tras una lengua de papel. El español del Perú. Lima: Fondo Editorial de la Pontificia Universidad Católica del Perú, 2010. 199 pp.
Authors: Cerrón-Palomino Rodolfo
Published: April 2022

La reseña no presenta resumen.
“Vuestra vertud me vala, Gloriosa, en mi exida”: función del culto mariano e ideología de cruzada en el Poema de Mio Cid
Authors: Riva Fernando
Published: April 2022

El presente artículo, inserto en el marco de los estudios cidianos, se propone señalar la existencia de una fuerte impronta del culto a la Virgen María en el Poema de Mio Cid (PMC), a partir del cual se articulan las escenas bélicas del poema y que se presenta como una proyección de las intenciones expansionistas de Castilla en el contexto de las guerras de reconquista española. Asimismo, se pretende demostrar la marcada influencia francesa en el culto mariano, que se puede apreciar a lo largo del texto, y su adopción por parte de la religiosidad peninsular, en particular, en relación con la ideología de cruzada que coincide con la cambiante noción de reconquista y se constituye como uno de los motores del poema.
Transculturación, heterogeneidad y literatura como "sistema". Aportes hacia una teoría crítica para la literatura actual
Authors: Chandía Marco
Published: April 2022

ResumenAnte la imperiosa necesidad de dar cuenta de la compleja trama que define la producción estético-literaria contemporánea latinoamericana, surge en la década de 1950 un conjunto de propuestas sobre transculturación, heterogeneidad y literatura como sistema, producto de profundas reflexiones que el pensamiento crítico ha venido engendrando sobre el fenómeno cultural-literario. Estos métodos de interpretación de nuestra cultura-literatura, pese a haber sido pensados para contextos específicos, asumen la totalidad contradictoria del conjunto, y con ella la posibilidad de estudiar el corpus de la literatura latinoamericana actual.Palabras clave: literatura contemporánea – teoría crítica – transculturación– sistema literario AbstractIn view of the imperious need to cover the complex plot that defines the aesthetic-literary contemporary Latin American production, a set of proposals on transculturation, heterogeneity and literature as a ‘system’ arises in the decade of 1950. This is the product of deep reflections on the cultural-literary phenomenon generated by the critical thinking. Although having being thought for specific contexts, these methods of interpretation of our culture-literature assume the contradictory totality of the whole assortment and, with it, the possibility of studying the corpus of the Latin-American current literature.Keywords: contemporary literature – critical theory – transculturation – literary system
Géneros textuales en las disciplinas: resúmenes de la Revista de Pedagogía de la Universidad Central de Venezuela 1996-2008
Authors: Blanco Carlos Eduardo
Published: April 2022

ResumenEste artículo presenta un análisis retórico de un corpus de 187 resúmenes de artículos de revista, así como formal de otras variables del resumen y otros dos géneros. El artículo más frecuente es el de investigación, sobre los ensayos. El resumen más frecuente es de solo introducción (dos tercios del total). Un tercio de ellos (31.55%) evidencia método y una cuarta parte (25.13%) resultados. No hay correspondencia entre lo hallado en la organización de los géneros mayores y rasgos textuales de los resúmenes. La estructuración de los resúmenes mejora a lo largo del eje diacrónico y su extensión aumenta. Hay poca diferencia entre la extensión de los resúmenes de los dos tipos de artículos. Se señalan implicaciones para la concepción de resumen de investigación en educación y el emparentamiento histórico-filosofico de esta disciplina.AbstractThis study analyzes rhetorically a corpus of 187 research journal abstracts. It also presents a formal analysis of other abstract variables and of two other published research genres. The most frequent genre is the resear charticle over the essay-like one. The most frequent abstract (about two thirds of the total) presents only an introduction. One third (31.55%) present a methods section and one fourth (25.13%) present a results section.There is no coincidence between main genre predominance in the journal and abstract structure. Abstract structure improves along the time span and extension also increases. There is no significant difference between extension of abstracts accompanying the two genre types. Implications for the idea of research abstracts and the historical-philosophical nature of the educational discipline are discussed.
Diglosia poética: Vallejo / Verlaine
Authors: Ballón Aguirre Enrique
Published: April 2022

La poesía de César Vallejo, al incorporar estrategias de expresión poética en las que se aleja de la “escritura monolingüe ideal” y hace intervenir diversos niveles de habla del castellano andino, es una clara muestra de una obra comprometida con el carácter plurilingüe de la sociedad en la que se inserta. Ahora bien, cuando Vallejo se traslada a París y cambia su entorno andino original por el del francés, solo algunas de las primeras innovaciones fueron mantenidas. En ese sentido, el objetivo del presente artículo es mostrar los modos en que se manifiesta el cambio de diglosia literaria castellano-quechua por la intervención del francés en la poesía vallejiana a partir del análisis del poema sin título incluido en Poemas humanos.
​Management of White Grub, H. consanguinea in Groundnut using Entomopathogens
Authors: Yadav Tara , Baloda A.S. , Saini K.K. , Jakhar B.L.
Published: April 2022

The white grubs infests diverse crops of food and horticultural importance such as groundnut, sugarcane, kharif pulses, vegetables areca nut, ginger, potato, etc. and it inflict losses as high as 100 per cent, depending upon the severity of infestation have been uncommon. In present study, attemts have been made to explore the potentiality of entomopathogens for the management of the white grub Holotrichia consanguinea a serious pest in groundnut crop in Rajasthan during kharif seasons, 2018 and 2019. Results revealed that furrow application of Beauveria bassiana, Metarhizium anisopliae powder formulation @ 5 kg (1×1012 CFU/gm) and H. indica galleria @ 5000 galleria per hectare at the time of sowing were significantly superior in reducing the per cent plant mortality (28.00%, 29.33%, 31.77%, respectively) and increase yield over untreated control (12.82, 11.53, 10.78 q/ ha respectively).
Scope of Horse Gram and Bambara Groundnut as Source of Food and Feed Legume: A Review
Authors: Biswal Bisworanjita , Kashyap Suryakanta , Bhattacharjee Subhradip , Kumar Rakesh , Kumar Dinesh , Ram Hardev , Meena R.K. , . Birbal , Das Rajeswari , Saxena Anurag
Published: April 2022

Underutilized legumes are nutritionally important group of crops with immense medicinal values and contribute significantly as a resource of profit to the poor farmers. Horse gram (Macrotyloma uniflorum) and Bambara groundnut (Vigna subterranean) are two such underutilized legumes largely grown in India and other South Asian countries contribute significantly to the diet of poor people during adverse climatic condition particularly to them who cannot afford to grow pulses that require balanced nutrition. They are fit for diversification, green manuring and may be used as cover crops and also thrive well under stressful dry environment. Changing lifestyle and climate variability bring enough scope for their cultivation and profitability. Horse gram is medicinally superior to other traditionally consumed pulses and can fight against Bacillus subtilis, Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. Besides its use as fodder crop, it cures urinary stones, gastritis, excessive post-partum bleeding, rheumatism, coronary heart disease, diabetes, etc. Bambara groundnut has distinctive drought adaptations and is suitable under semi-arid climate. Extract of Bambara groundnut is used as weaning food in African countries. The present review focuses on origin, morphology, genetic diversity, traditional uses, nutritional and medicinal importance, potential as food and fodder crop and constraints to higher productivity of both horse gram and Bambara groundnut.
Long-Range Impact of a Scale-up Model on Mathematics Teaching and Learning: Persistence, Sustainability, and Diffusion
Authors: Sarama Julie , Clements Douglas H.
Published: April 2022

Scaling up educational interventions in the STEM (Science, Technology, Engineering, and Mathematics) field is critical but under-researched. We review and draw implications from a series of studies investigating the long-range impact of an implementation of an early mathematics scale-up model based on learning trajectories. Lasting effectiveness includes persistence, sustainability, and diffusion. We conclude that persistence of the effects on individual children's trajectories of learning is difficult to achieve, and support for children must be maintained through elementary school. More positive and perhaps more important, implementation of the scale-up model showed impressive sustainability with teachers as it increased their use of intervention components and their fidelity to high-quality instruction. Also promising has been indications of diffusion.