bluuebunny/crossref_metadata_2025 huggingface dataset:
TECHNOLOGICAL APPROACH TO SOLVING THE PROBLEM OF MINIMIZING THE INFLUENCE OF DESTABILIZING FACTORS ON THE WORK OF DISTRIBUTED STRUCTURES OF THE GROUND-ROCKOTECHNICAL COMPLEX IN AN INTEGRAL PROJECT «OBJECT-SYSTEM»
Authors: Chepkyi V. , Skachkov V. , Yefymchykov O. , Nabok V. , Yelchaninov O.
Published: January 2020

Mobile structures of the ground-based robotic complex (RTC) are investigated as an active component formation of an integrated project “object-system”, which is operated in a destabilizing environment. The relevant problem of minimizing the influence of external destabilizing factors on the operation of mobile spatially-distributed structures of the ground-based RTC is stated in the descriptions of the conceptual apparatus of complex, poorly formalized multicomponent technical systems. Following the logic of this approach, the basic principles of distributed control are determined and their applications are implemented in the mobile structures of the ground-based RTC with elements of subsidiarity. The quintessence of the latter is represented by the technology of multi-antenna MIMO systems, which made it possible to determine the trade-offs of using classical transmission methods and strategies for receiving and processing MIMO signals in the multi-sensory channels of the information-control system (ICS) and radio communication with the data transmission system and commands. Given the complexity of performing the stated tasks, a set of technological functions of reducing the influence of destabilizing factors and their practical variations in the algorithms for obtaining the target result are proposed. A situational model of reducing (minimizing) information losses at the output of the information-control system of the ground-based robotic complex under destabilization has been built. Options have been proposed to achieve the target result: integration of structural and parametric adaptation methods, MIMO technologies, code division multiplexing techniques with CDMA channels, taking into account the heterogeneity factor of information exchange channels and the artificial redundancy of the system itself with respect to the number of external interference sources.
THE SOME QUESTIONS OF AUTONOMOUS MOTION AND MANAGEMENT
OF LAND-MOBILE ROBOTIC COMPLEXES
FOR UKRAINIAN GROUND FORCESE
Authors: Кravchuk О. , Symonenkov V. , Symonenkova I. , Hryhorev O.
Published: January 2020

Today, more than forty countries of the world are engaged in the development of military-purpose robots. A number of unique mobile robots with a wide range of capabilities are already being used by combat and intelligence units of the Armed forces of the developed world countries to conduct battlefield intelligence and support tactical groups.
At present, the issue of using the latest information technology in the field of military robotics is thoroughly investigated, and the creation of highly effective information management systems in the land-mobile robotic complexes has acquired a new phase associated with the use of distributed information and sensory systems and consists in the transition from application of separate sensors and devices to the construction of modular information subsystems, which provide the availability of various data sources and complex methods of information processing.
The purpose of the article is to investigate the ways to increase the autonomy of the land-mobile robotic complexes using in a non-deterministic conditions of modern combat. Relevance of researches is connected with the necessity of creation of highly effective information and control systems in the perspective robotic means for the needs of Land Forces of Ukraine.
The development of the Armed Forces of Ukraine management system based on the criteria adopted by the EU and NATO member states is one of the main directions of increasing the effectiveness of the use of forces (forces), which involves achieving the principles and standards necessary for Ukraine to become a member of the EU and NATO. The inherent features of achieving these criteria will be the transition to a reduction of tasks of the combined-arms units and the large-scale use of high-precision weapons and land remote-controlled robotic devices.
According to the views of the leading specialists in the field of robotics, the automation of information subsystems and components of the land-mobile robotic complexes can increase safety, reliability, error-tolerance and the effectiveness of the use of robotic means by standardizing the necessary actions with minimal human intervention, that is, a significant increase in the autonomy of the land-mobile robotic complexes for the needs of Land Forces of Ukraine.
REGULATORY DOCUMENTS OF MILITARY LOGISTICS:
CHANGES AND ADDITIONS
Authors: Kryvohuz H.
Published: January 2020

The author identifies deficiencies and suggests amendments and additions to the procedure of operational (combat) orders production (hereinafter referred to as the Procedure) as well as Field Manuals for the mechanized and tank forces of the Land Forces of the Armed Forces of Ukraine in order to improve graphic depiction of the performance of military logistics units at operational and tactical level.
The elimination of the identified deficiencies suggests the following changes: use identical typical symbols to depict similar in function units and elements of military logistics within all armed services and branches of the Armed Forces of Ukraine, which requires prior coordination with various military command and control agencies; use only letters of the Ukrainian alphabet in textual modifiers of the conventional symbols, avoid duplication of conventional symbols, which stand for various types of equipment, in textual modifiers; clarify the existing symbols and add some new ones to the Procedure in order to identify the units and technical means of logistics as well as their functional performance while accomplishing their tasks, anticipate the logistics units of the prospective organizational structure as well as local industrial facilities.
Taking in consideration the identified deficiencies, the following proposals for making changes and additions to specified regulatory documents are given: use identical symbols to indicate warehouses (artillery, engineering equipment, engineering weapons and ammunition storage, NBC protection equipment, topographic maps, armored vehicles, medical equipment); introduce new conventional symbols to indicate the performance of logistics units and all available means of military logistics (areas and points of transfer of material resources, points of meeting of automobile units with material means of rear services, technical means for cooking and washing clothing, patrols, supply and evacuation routes for the brigade ( regiment), local industrial facilities and economic infrastructure, mobile departments of deployed forces and service support elements); make recommendations regarding the size of letters for the footnotes on topographic maps scales 25,000 and 50,000, as well as codes of the maps used by military personnel with regard to the experience of participation of the Ukrainian Armed Forces in the antiterrorist operation (operation of the combined forces) in the Donetsk and Lugansk regions.
PROBLEMS AND PROSPECTS OF PROVIDING PERSONNEL PROTECTION WITH HEAT IN ISOLATION FROM THEIR STATION IN THE AREA OF THE JFO (ATO) AND FIELD OPERATIONS
Authors: Vlasov D. , Melnik V. , Polyashov S.
Published: January 2020

The analytical article examines the existing means and possibilities of the personnel heating in the field conditions. Separate versions of this problem solved in the foreign armies are considered. The actuality of development of mobile and efficient heating systems for military needs of Ukraine is substantiated.
The systems of generation of heat at combustion of solid fuel that are realized in logistics headwaiters of armed forces of Ukraine are considered. The historical conditions that have ensured the current situation of the use of systems of such combustion for a long time are revealed. The detailed comparative analysis of qualities of systems of one-stage and two-stage combustion of solid fuel is given. On the basis of the conducted analysis the conclusion about necessity of replacement of the little effective method of one-stage burning of solid fuel on two-stage systems is made. The advantages of the use of solid fuel combustion two-stage devices for heating of personnel premises in the area of the JFO and in the field exits are shown.
Among the indisputable advantages of the two-stage combustion system are: significantly dominating their efficiency (due to more full combustion and efficient heat transfer of heat to the room convection system), environmental friendliness, safety, Lower temperatures and whitish color of flue gases emitted. What is relevant in of solution of tasks reffered to the maintenance of combat capability of personnel due to their full rest and rehabilitation in extreme conditions.
TRANSPORT PLATFORMS OF MODERN LAND-MOBILE ROBOTS FOR CLANDESTINE CONDUCT OF BATTLE OPERATIONS AND TRANSPORTATION OF LOADS
Authors: Belikov V. , Kovalishyn S. , Papusha L.
Published: January 2020

The current level of development of robotic systems of armaments, military and special equipment is characterized by an accelerated transition to their construction on a modular basis. Due to this relatively small nomenclature of initial blocks-modules of lower levels can provide a large variety of the type of land-mobile robotic complexes of specialized functionality. There is an opportunity to quickly adapt the necessary robotic military equipment to specific combat conditions, which guarantees the reliable performance of the assigned combat missions.
It is proposed to equip the transport platforms for robotic systems of armament, military and special technics by electromechanical engines on the basis of autonomous drive modules with driven forced electric motors on the basis of rare-earth neodymium permanent magnets. At the same time, record high performance transshipment capacity is achieved, which dramatically increases the ability to overcome difficult road impediments.
The article deals with the design features of modular transport platforms for modern robotized weapons, military and special equipment systems, which are conditioned by the need for reliable delivery of weapons, ammunition, equipment, foodstuffs and medical supplies to the personnel on the line of contact with the enemy in difficult geoclimatic conditions.
It is shown that the necessary quality of realization of the assigned of combat tasks is ensured by the application of the installation on the platforms of autonomous electromechanical drives of driving wheels.
ANALYSIS AND ASSESSMENT OF METHODS AND MEANS OF DESTRUCTING INFORMATION FROM MAGNETIC MEDIA AS AN ELEMENT OF MODERN INFORMATION SECURITY
Authors: Semenenko O. , Dobrovolsky Y. , Koverga V. , Sechenev O.
Published: January 2020

Evolution of security technologies shows that only the concept of an integrated approach to information security can provide modern information security requirements. A comprehensive approach means the complex development of all the necessary methods and means of information protection.
Today, the information exchange and information systems in the Ministry of Defense of Ukraine have certain means and approaches to the destruction of information, but each of them has different estimates of the effectiveness of their use, as well as different cost of their purchase and use. Therefore, the main purpose of the article is to carry out a comprehensive analysis of means of destroying confidential information of methods of its destruction in order to formulate practical recommendations for choosing the most effective and economically feasible for the Ministry of Defense of Ukraine.
The perfection of methods and means of destroying information from magnetic media is an important element of modern information security. The results of the analysis carried out in the article are the disclosure of the main features of modern devices for the elimination of magnetic records, as well as the ability to formulate a list of basic requirements for modern devices for the destruction of information from magnetic media.
Today, technical means of information security, in particular, the elimination of information on magnetic media, are constantly being improved, absorbing the latest advances in modern security technologies. Their model range, which takes into account the diversity of customer requirements, such as the type of energy supply, the level of mobility, reliability and operating conditions, expands. All this determines the relevance of research topics in this direction in the future.
IN-CYLINDER FLOW ANALYSIS FOR A DIRECT INJECTION DIESEL ENGINE – A CFD APPROACH
Authors: S Ananthakumar , S Jayabal , P Thirumal
Published: January 2020

A parametric study of the effect of piston bowl configuration on air motion of a direct
injection diesel engine motored at 3000 rpm is investigated. Two piston bowl configurations (Mexican-hat and Re-entrant) are modeled for the computational flow analysis. The flow characteristics of these engine bowls are examined under transient conditions using STAR CD, a commercial computational fluid dynamics package. The predicted computational fluid dynamics results of mean swirl velocity of the engine at different locations inside the combustion chamber, at the end of compression stroke were compared with experimental results available in the literature. The results obtained showed very good agreement with the measured data given in the literature. This paper discusses the predicted flow structure inside the combustion chamber at top dead center, with different piston bowl shapes at 3000 rpm. It also compares the radial distribution of mean swirl velocity component in the piston bowl for the two cases. It is observed that the Re-entrant bowl provides a higher swirl ratio at almost all locations than the Mexican hat bowl.
EXPERIMENTAL STUDY OF ABRASIVE WATER JET MACHINING OF KEVLAR EPOXY COMPOSITE
Authors: Kumar Puneet , Kant Ravi
Published: January 2020

The present paper describes an experimental study of abrasive water jet machining (AWJM) of Kevlar epoxy composite. Influence of process parameters namely stand-off distance, water pressure, traverse speed and abrasive mass flow rate on surface roughness and kerf taper is investigated. Taguchi orthogonal approach is applied to plan the design of experiments; and subsequent analysis of experimental data is done using analysis of variance (ANOVA). It is found that water pressure and traverse speed are most significant parameters followed by stand-off distance and abrasive mass flow rate influencing surface roughness and kerf taper. With increase in water pressure
and decrease in traverse speed, kerf taper and surface roughness decreases.
ANALYSIS ON THE EFFECT OF NANO PARTICLES IN WASTE HEAT RECOVERY SYSTEM USING
HEAT PIPES BY RSM
Authors: S Gunabal
Published: January 2020

Waste heat recovery systems are used to recover the waste heat in all possible ways. It saves the energy and reduces the man power and materials. Heat pipes have the ability to improve the effectiveness of waste heat recovery system. The present investigation focuses to recover the heat from Heating, Ventilation, and Air Condition system (HVAC) with two different working fluids refrigerant(R410a) and nano refrigerant (R410a+Al2O3). Design of experiment was employed, to fix the number of trials. Fresh air temperature, flow rate of air, filling ratio and volume of nano particles are considered as factors. The effectiveness is considered as response. The results were analyzed using Response Surface Methodology
SLIDING WEAR PERFORMANCE OF NANO CUO PARTICLES - SHORT SISAL FIBERS - POLYAMIDE 66 HYBRID COMPOSITES
Authors: P Rajasekhar , G Ganesan , M Senthilkumar
Published: January 2020

Polymers and their composites are being increasingly employed in view of their good
strengths and corrosion resistance. The features that make the polymer composites in industrial applications are the opportunities to tailor their properties with special fillers. For instance, short carbon and glass fibers have been successfully employed to improve the strength and therefore the load carrying capacity of polyamide composites can also be improved Optimization of parameters is an important in the tribological process. Response surface methodology (RSM) based optimal parameter analysis was performed to investigate the change of responses like wear rate (WR) and coefficient of friction (COF) with the change of input parameters to determine optimum setting of process parameters such as normal force, sliding velocity and reinforcement for achieving minimum
WR and COF. The regression model generates the response surfaces. The present study is to optimize the parameter setting for combined responses.
OPTIMIZATION OF CYLINDRICAL GRINDING PROCESS PARAMETERS OF SS316L AUSTENTIC
STAINLESS STEEL BY TAGUCHI METHOD
Authors: Ganesh S Sankar , P Thirumal , M Anbarasu
Published: January 2020

The main objective of this study is to optimize the cylindrical grinding parameters that can be utilized to predict optimal grinding parameters to achieve minimum surface roughness of a material. A SS 317L Austentic steel round rod of 80 mm x 168 mm was considered for cylindrical grinding in this study. Cutting speed, depth of cut and feed rate were chosen as input variables while Surface roughness (Ra) selected as output response. An L9 orthogonal array was selected for this study and S/N ratios were analyzed to study the surface roughness characteristics. Nine experiments were conducted in the surface grinding machine with different values of input parameters obtained from the orthogonal array. The surface roughness values were optimized in the optimization software (Minitab version 17) and the optimal solution was obtained for minimum response. Minimum surface roughness is achieved with 100 rpm cutting speed, 0.03 mm depth of cut and 1 mm/s feed rate. The confirmation experiments were conducted for the optimal solution obtained from Taguchi experiment and the results are verified.
WEAR MECHANISM MAP OF MAGNESIUM ALLOY COATED WITH WC/CU ELECTRODE USING ELECTRO DISCHARGE ALLOYING
Authors: U Elaiyarasan , V Satheeshkumar , C Senthilkumar
Published: January 2020

The objective of this research is to study the wear mechanism of ZE41A magnesium alloy coated with WC/Cu material using EDC (Electro discharge coating). Dry sliding experiments were conducted with pin on disc method with different sliding condition such as normal load (1.5 kg - 3.5 kg), sliding speed (100rpm - 300 rpm) and sliding time (3min - 7min). Wear mechanism map was drawn against sliding condition of normal load and sliding speed which has been utilized to study the dominance of particular wear mechanism that dominates a particular wear regime. Different wear regime such as mild wear, severe wear ultra severe wear was developed by adjustment of contour line of the wear rate map. Various mechanisms such as abrasion, oxidation, delamination, plastic deformation and melting were observed in the worn surface
EXPERIMENTAL INVESTIGATION TO ENHANCE THE TRIBOLOGICAL CHARACTERISTICS OF A LUBRICANT USING NANOPARTICLE ADDITIVE
Authors: V Santhosh , N Babu
Published: January 2020

Copper oxide (CuO) nanoparticles were found to be an excellent additive to the lubricant in order to reduce the friction and wear between piston ring and cylinder liner. Friction and wear tests have been done experimentally using a pin on disc machine. Input parameters like load, speed, distance travelled are varied for each test, so that an effective combination for the minimal friction and wear have been obtained. The effect of adding additive is also found by varying the percentage of the nanoparticle in the lubricant. Also, after the best ratio for the additive in lubricant is selected, it can be used to run the engine in the laboratory, so that the performance and emissions of the engine with the new lubricant can be obtained. Finally, comparison can be made with the engine using
existing lubricant.
AN EMPIRICAL RELATIONSHIP FOR ESTIMATING METALLURGICAL AND MECHANICAL BEHAVIOR OF RESISTANCE SPOT WELDED DP800 STEEL JOINTS
Authors: C Rajarajan , P Sivaraj , V Balasubramanian
Published: January 2020

Similar joints of DP800 (Dual Phase) steel in lap joint configuration were fabricated using
resistance spot welding (RSW) process. The process parameters were optimized using DOE (design of experiments) and the welds joints were fabricated using the obtained DOE matrix. The tensile shear fracture load (TSFL) of joints was evaluated using universal testing machine. Microhardness variations across the weld cross-section was recorded using Vickers’s microhardness tester. Microstructural features were analyzed using optical microscopy (OM) and scanning electron microscopy (SEM). From this investigation, it is understood that increase in welding current increases the nugget zone size and it led to increasing the degrease of softening in the HAZ. The tensile shear strength is found to increase with increase in welding current up to a certain limit and then it decreases. The microhardness profile shows a peak hardness in nugget zone and the hardness is lower
in the HAZ. The softening of HAZ is mainly attributed to inter-critical heating during welding.
THERMAL PERFORMANCE OF INTERNALLY GROOVED HEAT PIPE WITH DIFFERENT FLOW RATE AND ORIENTATION
Authors: V Aruna , N Alagappan , I Ashokumar
Published: January 2020

In this present work reports an orientation and flow rate involves the thermal performance of heat pipe. Grooved heat pipe was filled with CuO nanofluid and DI water. Thermal performance and their resistance are discussed. The heat pipe is an experimentally Analyzed with different orientation and flow rate of cooling component with same heat input.
THEORETICAL AND FINITE ELEMENT ANALYSIS TO DETERMINE CONTACT PRESSURE, VONMISSES STRESSES AND WEAR IN CAM AND FOLLOWER FOR VARIOUS CAM
ROTATIONAL ANGLES IN IC ENGINE
Authors: K Jayakumar , Raj J Aldrin , Subramanian S Somesh
Published: January 2020

The contact between the cam and follower that exists in the valve strain system of IC engine influences wear. The dynamic analysis of cam and follower system in carried to find the normal compressive force for various cam rotational angles. Based on this compressive force on the cam, the hertz contact stresses and surface wear are calculated theoretically. Finite element analysis was carried out in the three critical portions of the cam such as cam nose region, cam tangent region and cam base circle region to compare the results. The results showed that cam rotational angle directly affects the contact pressure. The max contact pressure occurs in the nose end of the cam. The results showed that principle stress and wear also increases with cam rotational angle
DESIGN AND ANALYSIS OF A SCREW PROPELLER IN MARINE VEHICLE
Authors: V Santhosh
Published: January 2020

In marine vehicle like ships, submarine and torpedoes use propeller for its propulsion,
Propeller is to develop the thrust and propulsive efficiency. The paper deals with modeling and analyzing of a screw propeller. There are several important parameters to be considered for modeling screw propeller by using Solidworks software. Static and dynamic analysis is to be carried out in Ansys fluent software. Thus, the simulation of screw propeller provides maximum velocity to the outlet. So, the velocity distribution has been observed. Then the velocity distribution is displayed by means of velocity magnitude in meter per second and static pressure in pascal.
EXPERIMENTAL AND PERFORMANCE ANALYSIS OF SOLAR REFRIGERATION SYSTEM USING NANO FLUIDS
Authors: M Sivakumar , S Mahalingam , V Ranjithkumar
Published: January 2020

In today’s world refrigeration systems play a vital role to fulfil the human needs. A
continuous research is being carried out by many researchers in order to improve the performance of these systems. Presently used, vapour compression refrigeration system does not work efficiently due to shortage of electric power. This study covers a broad overview of solar photovoltaic technology, which uses easily available solar energy for refrigeration purpose. It includes a motor, a compressor,
an inverter and battery, a photovoltaic controller and panels. This can be done by converting solar energy in to electricity by means of photovoltaic devices, which can be utilized by the electric motor to drive vapour compression refrigeration system. The main objective of the study is managing the shortage of electric power, in living environments by using a cooling system coupled to a solar installation. In this solar refrigeration system, when conventional refrigerants like (R22, HFCR134a,
R600, etc.) are used it leads to low thermal conductivity, heat transfer rate and COP level and some of the other impacts are acid rain, melting of glaciers, sea level raising, health impacts, atmospheric pollution, ozone depletion, which is very hazardous to the environment. To avoid these threats, one of the ways is to use nanofluids which are not harmful to the environment. The usage of nanofluids results in high thermal conductivity, heat transfer rate and give better COP level. The following three
nanofluids Al2o3, Zro2, Cu2o have been already used in the refrigeration system. Some of the properties of given nanofluids will be changed to innovate new nanofluids. The innovated nanofluids will be used in refrigeration system and the same will be compared with other nanofluids like R22, R134a, R290, and R600a. Even though Al2o3, Zro2, Cu2o gives good results, the new nanofluids have been innovated for better results.
TRIBOLOGICAL BEHAVIOUR OF CERAMIC COATING
Authors: R Sathiyamoorthy , K Shanmugam , T Senthilvelan , D Thirumalaikumarasamy
Published: January 2020

Titania or titanium di-Oxide (TiO2) is a multi-functional ceramic material having many
potential applications, such as medical technology, photo catalysis and wear protection. In this study, Titania and TiO2+10% SiC coating was deposited on titanium substrate by High Velocity Oxy-Fuel (HVOF) spraying. The Microhardness and porosity of the coatings was measured using Vickers microhardness tester on coating cross section and bond strength was measured as per ASTM C633. The XRD analysis identifies the rutile as major phase and presence of secondary phases in TiO2-SiC coating. The sliding wear behavior of substrate, coatings was evaluated using Pin-on-disk apparatus as per ASTM G99 standard. Worn surface morphologies were analysed by SEM and found that the major wear mechanisms are plastic deformation, brittle fracture and micro cutting.
DEMAND FORECASTING OF INDUSTRIAL ELECTRICAL ENERGY CONSUMPTION FOR TAMILNADU STATE
Authors: T Senthilkumar , R Venkatesh , Charles J Sam , P Senthil , kumar V Praveen
Published: January 2020

Energy consumption forecasting is vitally important for the deregulated electricity industry
in India, particularly in Tamilnadu state. A large variety of mathematical methods have been
developed for energy forecasting. In this study, historical data set including population (POP), Gross state domestic Product (GSDP), Yearly peak demand (YPD), and Per Capita income (PCI) were considered from the year 2005 to 2011.Firstly, the multiple linear regression model (MLRM)has been developed. The regression model outputs were optimized using Neural network method.
A NEW MODEL FOR COUPLING OF TRIBOLOGICAL AND MECHANICAL MODELS OF THIN STRIP AND FOIL ROLLING
Authors: Kumar Manoj , Raman Jyoti , Priya Priya
Published: January 2020

A new analysis for cold rolling of thin strip and foil is developed. This model follows the
approach of Fleck et al [8], but relaxes their assumption of a central flat neutral zone. Instead of following their inverse method to obtain the pressure distribution in this neutral zone, an explicit equation for the contact pressure variation is obtained from the sticking condition in this region. This significantly simplifies the solution method, leading to a much more robust algorithm. Moreover, the method treats the cases either where the roll retains its circular arc or where there is very significant roll deformation in the same way, greatly simplifying the method of obtaining solutions. This will facilitate the incorporation of other effects such as the friction models currently being developed. Results are in line with the theory of Fleck et al [8]. The effect of entry and exit tensions on the nondimensional load and forward slip is investigated. It is found that the effect of equal entry and exit
tensions is equivalent to reducing the yield stress of the strip by this tension stress.
AN EXPERIMENTAL STUDY ON INFLUENCE OF PROCESS PARAMETERS ON DROSS PROPERTIES IN LASER MACHINING OF AISI 304 MATERIAL
Authors: Jadhav Aniket , Kumar Shailendra
Published: January 2020

The present paper describes an experimental study on influence of process parameters on dross properties in laser machining of AISI 304 material. Process parameters namely laser power, cutting speed and gas pressure are considered in the present work. Design of experiments is done using response surface methodology and analysis of variance is performed in order to identify significance and influence of process parameters on dross height. It is found that laser power and gas pressure are most significant parameters followed by cutting speed. Dross height increases with increase in laser power and decreases with decrease in gas pressure. On the basis of experimental analysis, a second order mathematical model is developed to predict dross height. Model predictions
and experimental results are found in reasonable agreement. Further, optimization of process parameters is also performed to minimize dross height
EXPLOSIVE CLADDING OF ALUMINIUM 5052-STAINLESS STEEL 304
Authors: S Saravanan , G Murugan
Published: January 2020

This study addresses the effect of process parameters viz., loading ratio (mass of
explosive/mass of flyer plate) and preset angle on dynamic bend angle, collision velocity and flyer plate velocity in dissimilar explosive cladding. In addition, the variation in interfacial microstructure and mechanical strength of aluminium 5052-stainless steel 304 explosive clads is reported. The interface exhibits a characteristic undulating interface with a continuous molten layer formation. The interfacial amplitude increases with the loading ratio and preset angle. Maximum hardness is observed at regions closer to the interface
STUDY ON FORMING FORCES OF PARTS PROCESSED BY SINGLE POINT INCREMENTAL
FORMING WITH DUMMY SHEET
Authors: Sisodia Vikas , Kumar Shailendra
Published: January 2020

The present paper describes the experimental investigation on influence of process
parameters on maximum forming force in Single Point Incremental Forming (SPIF) process using dummy sheet. Process parameters namely dummy sheet thickness, tool size, step size, wall angle and feed rate are selected. Taguchi L18 orthogonal array is used to design the experiments. From the analysis of variance (ANOVA) dummy sheet thickness, tool size, step size and wall angle are significant process parameters while feed rate is insignificant. It is found that as dummy sheet thickness, tool size, step size and wall angle increase magnitude of peak forming force increases while there is marginal decrease in forming force as feed rate increases. Predictive model is also developed for forming force. Validation tests are performed in order to check the accuracy of developed model.
Optimum set of process parameters is also determined to minimize forming force. Experimental results are in good agreement with results predicted by the developed mathematical model.
EXPERIMENTAL INVESTIGATION ON ABRASIVE WATERJET MACHINING OF FIBRE VINYL ESTER
COMPOSITE
Authors: Kumar Puneet , Tank Bhavik , Kant Ravi
Published: January 2020

Abrasive water jet machining (AWJM) is one of the most developed non-traditional
machining processes. It is generally used to cut difficult to cut materials like composites. The present study is focused on machining of carbon fiber vinyl ester composite with AWJM. The effect of process parameters namely water pressure, standoff distance and traverse speed on surface roughness and kerf tapper is studied. Design of experiment is done by using Taguchi L16 orthogonal array. It is observed that water pressure is the most significant parameter followed by traverse speed. It is found that with the increase in water pressure and decrease in traverse speed of AWJM, surface roughness and kerf tapper of machined samples decreases.
INVESTIGATION OF WELDING SPEED ON FUSION ZONE CHARACTERISTICS OF GTA WELDED AZ31B MAGNESIUM ALLOY JOINTS
Authors: V Subravel , M Thambidurai
Published: January 2020

In this investigation an attempt has been made to study the effect of welding on fusion
characteristics of pulsed current gas tungsten arc welded AZ31B magnesium alloy joints. Five joints were fabricated using different levels of welding speed (105 mm/min –145 mm/min). From this investigation, it is found that the joints fabricated using a welding speed of 135 mm/min yielded superior tensile properties compared to other joints. The formation of finer grains and higher hardness in fusion zone and uniformly distributed precipitates are the main reasons for the higher tensile properties of these joints.
INVESTIGATION OF TENSILE BEHAVIOUR OF TIG WELDED 316 STAINLESS STEEL USING TAGUCHI TECHNIQUES
Authors: T Karthimani , N Babu
Published: January 2020

This works aims at the analysis and optimization of joining similar grades of stainless steel by TIG welding. TIG welding may use a filler material. There is a variant in the process which does not require filler material. Such process is known as Autogenous TIG welding process. The parameters like current, welding speed and gas flow rate are the variables in the study. The objective of this research is to determine the influence of various welding parameters on the weld bead of 316 SS by using Taguchi technique. A plan of experiments based on Taguchi technique method has been carried out. Orthogonal array, signal to noise (S/N) Ratio, Analysis of variance (ANOVA) are employed for studying the welding characteristics of material & to optimize the weld parameters. The result obtained are the output from each parameter, through which optimal parameters are found out for maximum tensile strength. It is found that -welding current followed by welding speed are major parameters influencing mechanical properties of welded joint
EFFECTS OF VARYING PUNCH-DIE CLEARANCES DURING HOLE PIERCING IN CHAIN COMPONENTS – A SIMULATED EXPERIMENTAL STUDY
Authors: KS Sekar
Published: January 2020

The punch die clearance in metal stamping tool is an important factor which decides the
produced component’s quality. It affects the size and quality of the profile produced by the blanking or piercing operation. An attempt is taken in this study to analyses the effects of varying punch-die clearances during hole piercing operation in an industrial chain component using DEFORM 3D software. Simulations were conducted with insufficient, optimum and Excessive clearance values and their results are discussed. The simulation experiments are conducted on AISI 1060 steel component used for industrial chain as inner plate, and the results of the simulations are discussed
COMPARISON STUDY ON PULSED AND ARC OSCILLATION TECHNIQUES OF GTA WELDED AZ31B MAGNESIUM ALLOY JOINTS
Authors: V Subravel , B Asaithambi
Published: January 2020

The challenges of achieving significant weight reduction in the automobile industry in the context of fuel savings, recyclability and emission reduction has promoted focus on lightweight metals such as magnesium. GTA welding technology is the main welding method adopted for magnesium alloys because of its advantages of utility and economy. Both magnetic arc oscillation and current pulsing techniques resulted in significant microstructural refinement in weld fusion zone. Hence in this investigation an attempt has been made to study the arc pulsing and arc oscillation on tensile and microstructural characteristics of pulsed current gas tungsten arc welded AZ31B magnesium alloy joints. From this investigation, it is found that the joints fabricated with magnetic arc oscillation having the superior tensile properties compared to pulsed current welding. The formation
of fine grains and higher hardness in fusion zone are the main reasons for the superior tensile properties of these joints
A STUDY ON DESIGN AND CRASH ANALYSIS OF AUTOMOTIVE ENERGY ABSORPTION TUBES
Authors: Manishkumar H Maurya , K Desai Chinmay
Published: January 2020

In engineering and technology safety of human life has always been a top priority. With the increasing usage of vehicles in everyday life, probability of deaths and injuries has also increased, but safety is important too. The main aim of this study is for designing an energy absorption tubes (Crush Can) of different shapes, thickness, at 10 km/hr speed and checking its performance by numerical simulation on the basis of FMVSS by using Finite Element Analysis and evaluate the result by changing design of Crush Can in the form of stress, energy graphs are plotted, by comparison of results, we can suggest that 1mm thickness and circular design absorb optimum stress and more energy than other. The HYPERMESH software is used in meshing and LS-DYNA software is used as a solver
A NUMERICAL INVESTIGATION ON FORMING BEHAVIOUR OF HOMOGENEOUS BLANKS DURING SINGLE POINT INCREMENTAL FORMING PROCESS
Authors: Marathe Shalin , Raval Harit
Published: January 2020

Single Point Incremental Forming (SPIF) process is one of the advanced forming techniques that industry has nowadays. Improved formability is one of the major advantages of the process. However, it is associated with limitation such as thinning of blank and poor geometrical accuracy of the formed part. In this study, forming behaviour of homogeneous blanks during the SPIF process has been investigated. A simulation study has been carried out using ABAQUS/Explicit. Effect of change in thickness, yield strength, strain index and strength coefficient of blank on responses like Plastic Equivalent Strain (PEEQ), percentage of thinning and geometrical accuracy of formed component has
been evaluated. It has been found that change in the thickness has major effect on PEEQ and geometrical accuracy. Regarding percentage of thinning, change in the yield strength of blank is found to be majorly affecting.
MafF Is Regulated via the circ-ITCH/miR-224-5p Axis and Acts as a Tumor Suppressor in Hepatocellular Carcinoma
Authors: Wu Minhua , Deng Xubin , Zhong Yu , Hu Li , Zhang Xiujuan , Liang Yanqin , Li Xiaofang , Ye Xiaoxia
Published: January 2020

MafF is a member of the basic leucine zipper (bZIP) transcription factor Maf family and is commonly downregulated in multiple cancers. But the expression and function of MafF in hepatocellular carcinoma (HCC) remain unclear. In this study, we investigated the relationship between endogenous
MafF expression and HCC progression and explored the regulatory mechanism of MafF expression in HCC. We found that MafF decreased in HCC tissues and cells. Lentivirus-mediated MafF overexpression inhibited HCC cell proliferation and induced cell apoptosis. Bioinformatics analysis and luciferase
assay identified MafF as a direct target of miR-224-5p. RNA pull-down assay demonstrated that circular RNA circ-ITCH could sponge miR-224-5p specifically in HCC. The rescue experiments further elucidated that the expression and antitumor effects of MafF could be regulated via the circ-ITCH/miR-224-5p
axis. This study verified that MafF acted as a tumor suppressor in HCC and revealed the upstream regulation mechanism of MafF, which provided a new perspective for potential therapeutic targets of HCC.
DRAMATURGIA E A POÉTICA BACHELARDIANA
Authors: Borralho Tácito Freire
Published: January 2020

Proponho-me realizar neste artigo, um estudo embrionário de análise de texto dramatúrgico, tomando por parâmetro à poética bachelardiana. Isso se dá verificando a construção dramática (incluindo a criação dos personagens, a trama total e elaboração dos conflitos), fundada na relação entre os elementais e seus simbolismos existentes no imaginário poético. Assim, a exposição de um resumo da peça, a descrição dos personagens e análise de cada cena, contribuem para um entendimento mais completo do enredo e de como este se desdobra pra dar conta e comunicar uma história plena, cujos sujeitos atuantes revelam seus caracteres num estado simbólico correspondente.
ESCOLAS ARTÍSTICAS ESPECIALIZADAS E SUA DIDÁTICA COMO FATORES DETERMINANTES DA EDUCAÇÃO
Authors: Das Neves José António De Matos Esteves
Published: January 2020

Através deste trabalho, pretendemos estudar a problemática do Ensino Especializado da Música em Portugal, com especial enfoque no papel dos Estabelecimentos de Ensino Particular e Cooperativo e na forma como este género de ensino tem sido visto pela Tutela no decorrer dos últimos 35 anos, enquanto componente fundamental na formação dos nossos jovens. É abordado o papel que este desempenha no desenvolvimento dos jovens, bem como a problemática centrada na legislação, nas diferentes didáticas, metodologias e pedagogias no contexto dos Conservatórios.
O Sertão imaginado na Ária “Cantiga” das Bachianas Brasileiras
Authors: Medeiros Ana Judite Oliveira , Lopes Eduardo
Published: January 2020

O presente artigo traz uma perspectiva reflexiva sobre a visão ou interpretação dada ao sertão nordestino na Ária “Cantiga” da Série Bachianas Brasileiras de Heitor Villa Lobos. Considerando a problemática da “nordestinidade” e “regionalidade” que envolve o tema, a peça foi analisada a partir do conceito de tópicas (Agawu, 1982; Piedade, 2013), elementos entendidos como lugar-comum, de onde são produzidos silogismos retóricos e dialéticos. A partir desse conceito buscar-se-á compreender na obra pontos ou troposque possam revelar a “atmosfera” do Sertão, e consequentemente seu discurso musical. A questão que levantamos é como o sertão nordestino pode ser percebido na música de Villa Lobos? Para isso foram realizados dois procedimentos de análise, um das tópicas e o outro em atividade experimental descritiva, a fim de identificar aproximações ou distanciamentos do tema na peça. A contribuição que esperamos trazer com este texto é, que através das Bachianas Brasileiras, seja possível elaborar outras ou novas interpretações sobre a região considerando os nexos históricos e culturais construídos em torno dela.
A CIÊNCIA NA ARTE MUSICAL DO SÉC. XX: DUAS CORRENTES CONTÍGUAS
Authors: Santos Sandra Cristina , Postiga José Luís Fangueiro
Published: January 2020

Observando o desenvolvimento de múltiplas correntes estéticas no pós-segunda grande guerra, procura-se nas raízes das ciências denominadas de exatas, os conceitos abstratos que definem novas correntes estéticas da arte musical. Para isso, procuram-se as relações entre a matemática e geometria com a música desenvolvida por Karlheinz Stockhausen, particularmente em Gruppen (1955-57) para três orquestras, assim entre leis da física e sua exportação para os conceitos arquitetónicos e musicais de Iannis Xenakis, focando Metastaseis (1953-54) para 61 músicos.
INTEGRAÇÃO CORPO-MENTE-INSTRUMENTO NA ARTE MUSICAL: aspectos cognitivos e sua significância segundo o entendimento de músicos brasileiros
Authors: Licursi Maria Beatriz , Morgado Elsa Maria , Cardoso Mário Aníbal , Da Silva Levi Leonido Fernandes
Published: January 2020

Nesta investigação, fruto da tese de doutoramento, salientamos o estudo da neurociência em seus respetivos tópicos pertinentes à arte musical vinculados à integração corpo-mente-instrumento. Nossa definição do problema realizou um inquérito a respeito da compreensão dos músicos sobre os processos cognitivos, motivacionais e emocionais integrados corporalmente bem como a realização da performance musical. De acordo com o nosso objetivo geral, avaliamos as percepções dos profissionais sobre o papel do corpo na execução musical, determinando o problema. Foram aplicados questionários fechados utilizando a escala Likert em paralelo ao questionário de opiniões com abordagem qualitativa cuja avaliação empregou o método Bardin de análise de conteúdo. A hipótese geral foi a de que se encontra presente na percepção dos músicos desde a sua formação a ideia de que a performance musical é otimizada pela integração corpo-mente-instrumento. Validadas as dez hipóteses levantadas comprova-se que os aspectos cognitivos são importantes para a integração corpo- mente-instrumento, na arte musical.
GRACIELA GONZÁLEZ: EXPERIENCIA CORPORAL Y CAMBIO GENERACIONAL EN EL TANGO TRADICIONAL
Authors: Laguna Alejandro César Grosso
Published: January 2020

El estudio del gesto corporal y la construcción participativa de los movimientos de los ‘viejos’ milongueros argentinos se ve obstaculizado por el hecho de que sus protagonistas ya no están vivos. Este trabajo investiga ambos temas de manera indirecta, realizando una entrevista semidirigida con la maestra y bailarina Graciela González, quien desde los años 80 tuvo como maestro y fue pareja de baile de Norberto 'Pupi' Castello, uno de los mitos de la milonga 'porteña'. González describe algunas de las características gestuales e intencionales menos conocidas de estos ‘viejos’ milongueros, y explica cómo algunas de estas características se han perdido como resultado de los cambios generacionales y la velocidad de las comunicaciones generadas por las redes sociales.
ENSINO DE XIGUBO: UMA VALORIZAÇÃO DA INTERCULTURALIDADE EXISTENTE NA ESCOLA SECUNDÁRIA DE CAMBINE
Authors: Guidione Dinis Armando , Maria Anabela Lima
Published: January 2020

Decorrente dos processos de Globalização, nos últimos anos, tem-se vindo a colocar cada vez mais a questão do interculturalismo. Sendo esta uma temática complexa, surge-nos como tema o ensino de xigubo na promoção da relação humana e a valorização da interculturalidade, atendendo à importância de que se reveste. Questionamo-nos sobre a diversidade e a forma como esta contribui para o ensino de xigubo, objecto do nosso estudo: Ensino de Xigubo: uma valorização da interculturalidade existente na Escola Secundária de Cambine, Distrito de Morrumbene – Moçambique. Centramos a nossa reflexão no ensino de xigubo, partindo do pressuposto de que Moçambique é um país multilingue e multicultural habitado por diferentes grupos etnolinguísticos com maior predominância para os de origem Bantu. A Escola Secundária de Cambine não foge dessa realidade muito mais por se localizar no Centro Educacional de Cambine que desde a sua fundação é um pólo de atracção populacional por motivos estudantis, profissionais e missionários. Esta coabitação de diversos povos, em que cada um carrega os seus usos e costumes, favorece o diálogo entre as culturas presentes; sendo assim, convocamos o conceito de interculturalismo como sendo a interacção entre culturas que interagem de forma recíproca. O desafio, que se lança à Direcção da Escola, é o de adequar o Projecto Político Pedagógico à realidade local e, deste modo, desenvolver estratégias para a valorização das diferenças socioculturais dos grupos humanos, tendo como foco a contribuição do ensino das danças tradicionais, pondo assim em destaque a educação artística, importante na formação dos(as) alunos(as), para melhor interpretarem o mundo e conhecerem as suas tradições. É a observação da realidade de Cambine que nos motiva a escolher a temática desta comunicação com o objectivo de convidar os(as) professores(as) de Educação Física e Educação Visual a aproveitar a coexistência de diversas subculturas e a integrá-las no desenvolvimento dos cursos de curta duração e no processo didáctico, de modo a ligar o global – vivências diversificadas – e as aprendizagens estruturantes com as aprendizagens de contextos informais e não formais que os diferentes estudantes possuem.