bluuebunny/crossref_metadata_2025 huggingface dataset:
Mechanistic understanding of lodging in spring wheat (Triticum aestivum): An Indian perspective
Authors: BAINSLA NARESH KUMAR , YADAV RAJBIR , SHARMA RAM KUMAR , SHARMA AMBRISH , GAIKWAD KIRAN B , KUMAR AMIT , SINGH VIKRAM , VYAS PRITESH , SHARMA AMBIKA
Published: February 2023

Lodging in modern spring wheat (Triticum aestivum L.) varieties is largely overlooked in India. There is scanty information available in literature for Indian condition regarding the extent, distribution, direct and indirect losses caused by the lodging. Little work has been done on this problem post green revolution period in India. Introduction of dwarfing genes and development of semi-dwarf varieties has resulted in quantum yield gains during 1970-80.After this period till recent years the progress in yield gains are slowed down mainly due to plant architecture of modern varieties not supporting heavier heads inducing lodging. Therefore, the higher potential of genotypes could not be realized to full extent at field level and varieties promising consistent yield level of six tonnes /ha or more are lacking. The complex phenotyping strategies and models designed by the workers working on the problem elsewhere are further impeding the progress as these are not much helpful at field level under Indian conditions. The currentÂ  paper takes into the consideration the mechanistic approach to understand the problem and correlate the facts andfindings of universal nature to design the strategies to manage the lodging through different approaches much suitedÂ  to Indian conditions.
Genetic variability, heritability and genetic advance in litchi (Litchi chinensis)
Authors: MARBOH E S , GUPTA A K , GYANESH K , SINGH M , SINGH A , NATH V
Published: February 2023

Litchi (Litchi chinensis Sonn.) is one of the most important subtropical fruit crops of the world. Improvement in this crop is constrained by its narrow genetic base, which is a major bottleneck in reaching the desired objectives. Studies on the nature and extent of genetic variability are highly relevant to yield information that can be useful for genetic improvement programmes. In the present study, 22 litchi genotypes including three new varieties were assessed for the variability, heritability and genetic advance and principal component analysis on the basis of 13 quantitative fruit traits. High phenotypic and genotypic coefficients of variation were recorded for pulp weight (32.86 and 31.11%), seed weight (30.56 and 27.93%), peel thickness (25.07 and 20.21%), pulp thickness (24.79 and 22.22%) and fruit weight (22.65 and 21.17%).The heritability and genetic advance were found maximum for fruit yield/plant. High heritability coupled with high genetic advance was recorded for fruit weight, fruit length, fruit width, pulp weight, pulp thickness, seed weight, peel thickness, peel weight, seed width (y-axis) and yield/plant, indicating ample scope of improvement for these traits through selection. From PCA and variability estimates, fruit weight, pulp weight, peel weight, peel thickness, seed weight and seed size were identified as important traits for identifying high-yielding genotypes.
Yield trends and changes in soil fertility in a long term pearl millet (Pennisetum glaucum)-wheat (Triticum aestivum) cropping system managed with organic, inorganic and integrated sources of nutrients
Authors: SHEORAN SUNITA , ANTIL R S , DEVRAJ DEVRAJ , DEEPIKA DEEPIKA , GREWAL K S
Published: February 2023

The present study was carried out to evaluate the yield trends and soil fertility under long term field experiment at soil research farm of CCS Haryana Agricultural University, Hisar, India. Results showed that average grain yield of wheat (Triticum aestivum L.) and pearl millet (Pennisetum glaucum (L.) R. Br) across the experimentation period was higher under integrated application of organic manures along with 150 kg N+30 kg P2O5/ha through chemical fertilizers as compared to application of recommended dose of nutrients through chemical fertilizers alone (150 kg N+60 kg P2O5/ha). Lowest grain yield of both crops was observed when organic manures applied alone. Positive yield trend of both the crops was observed under all the nutrient management practices. The highest soil organic carbon (SOC) (1.14%) was recorded with the application of farmyard manure (FYM) followed by pressmud and poultry manure. Build-up of organic carbon ranged from 0.016 to 0.037%/year with application of FYM, poultry manure, pressmud as a component of integrated nutrient management. Highest amount of humic acid-C (HA-C) and fulvicacid-C (FA-C) (0.40 and 0.21%, respectively) was observed with application of 7.5 Mg pressmud along with 150 kg N+30 kg P2O5 /ha. Integrated nutrient management (INM) showed superiority on better grain yield of pearl millet and wheat in these alluvial soils of Haryana.
Effect of tillage, crop residue and phosphorus management practices on the productivity and profitability of maize (Zea mays) cultivation in Inceptisols
Authors: KUMAR AMIT , BEHERA U K , DHAR SHIVA , SHUKLA LIVLEEN , BHATIYA ARTI , MEENA M C , GUPTA GAURENDRA , SINGH RAMESH KUMAR
Published: February 2023

A field experiment was conducted during kharif seasons of 2016–17 and 2017–18 at the research farm of ICAR–Indian Agricultural Research Institute, New Delhi to evaluate the effect of tillage, residue and phosphorus management practices on the growth, yield attributes, yield and economics of maize (Zea mays L.). The experiment comprised 15 treatment combinations laid out in a split–plot design with three replications. The main–plot treatments included three different tillage practices : CT–R (Conventional tillage with no residue), ZT–R (Zero tillage with no residue), ZT+R (Zero tillage with residue @ 2.5 t/ha for both maize and wheat) and sub–plot treatments included five phosphorus management practices: P1 (Control–NK as per recommendation, but no P), P2 (17.20 kg P/ha), P3 (17.20 kg P/ha + PSB), P4 (17.20 kg P/ha + Compost inoculants) and P5 (34.40 kg P/ha). Results revealed that, among the tillage practices, ZT+R found significant effect on growth and yield attributes of maize compared to CT–R during both the years of experiment. Different phosphorus management practices, application of 34.40 kg P/ha significantly improved the growth and yield attributes of maize compared to control treatment during both the years. Combined use of conservation agricultural practices (zero tillage with crop residue retention of 2.5 t/ha both the crops) along with application of 34.40 kg P/ha resulted significantly higher grain yield (6.40 and 6.49 t/ha), gross returns (105 and 114 ×103 `rs./ha) and net returns (64 and 72 ×103 rs.`/ha) during both the years of experiment but B:C ratio was maximum under combination of ZT–R with application of 34.40 kg P/ha during both the years.
Soil manganese dynamics and its uptake in wheat (Triticum aestivum) influenced by chloride and manganese application
Authors: NARENDER NARENDER , MALIK R S
Published: February 2023

Manganese (Mn) is one of the essential micro-nutrients having an important contribution in paddy (Oryza sativa L.)-wheat (Triticum aestivum L.) cropping systems. Wheat is an important cereal crop of Haryana State and is highly susceptible to Mn deficiency. During submerged paddy, solubility of Mn increases appreciably because of its reduction and continuous leaching from upper to lower soil layers which in turn results in its deficiency in the succeeding winter season crops especially wheat. Often, Mn fertilization under salinity stress is of main concern to be investigate, especially in arid and semi-arid regions of Haryana. So, in order to evaluate soil manganese dynamics and its uptake in wheat influenced by chloride (Cl-) and Mn application, laboratory as well as a screen house experiment was conducted at CCS HAU, Hisar, Haryana. Results revealed that a decreased grain and straw yield and Mn uptake in wheat with graded doses of Cl- application. The highest grain and straw yield of wheat were recorded with 25mg Mn/kg and without chloride application. However, maximum Mn content and its uptake in wheat was recorded under treatment of 50 mg Mn/kg. Among all Mn fractions in post-harvest soils, maximum Mn was associated with residual (RES) fraction followed by MnOX > AFeOX > CFeOX > EX > CARB > OM fractions. Organic matter bound (OM) showed a very little amount of Mn content due to low content of organic carbon in experimental soil. Thus, chloride application along with Mn fertilizers showed antagonistic effect on wheat yield and its uptake as well as Mn dynamics in soil.
Productivity and nutrient uptake of pigeonpea (Cajanus cajan) in pigeonpea based intercropping systems as influenced by planting pattern and nutrients levels applied to intercrops
Authors: SEKHON FATEHJEET SINGH , SINGH THAKAR , SAINI K S
Published: February 2023

The experiment was conducted at students’ research farm, Punjab Agricultural University, Ludhiana during 2015 and 2016 to study the effect of planting pattern and levels of nutrient applied to intercrops on growth, yield and nutrient uptake in pigeonpea [Cajanus cajan (L.) Millsp.] based intercropping systems. Pigeonpea seed yield and biological yield were not significantly influenced by different planting pattern and nutrient level applied to intercrops under different intercropping systems during both the years. Pigeonpea equivalent yield was significantly affected by planting pattern and nutrient levels. Highest pigeonpea equivalent yield (1.84 and 1.90 tonnes/ha) was observed under planting pattern of pigeonpea (50 cm × 25 cm) + maize fodder during during both the years. Pigeonpea equivalent yield increased with increase in levels of nutrient to intercrops and maximum pigeonpea equivalent yield of 1.63 and 1.73 tonnes/ha was obtained with 100% of recommended dose of nutrients applied to intercrop. N, P and K uptake by pigeonpea was not affected by different planting pattern but N (75.3 and 80.8 kg/ha), P (16.0 and 17.2 kg/ha) and K (70.0 and 78.4 kg/ha) uptake was maximum with 100% nutrients applied to intercrops during both the years, respectively. Similar trend was observed with available N, P and K in soil at harvest.
EFFECT OF THRIPS (PSUDODENDROTHRIPS MORI NIWA) INFESTED MULBERRY LEAVES ON BIOCHEMICAL AND ECONOMIC PARAMETERS OF SILKWORM, Bombyx mori L.
Authors: DAYANA T. BABY , BAI M. RAMANI , JEBAMALAR D. DAYANA , SUJI T. THANGA
Published: February 2023

Mulberry, (Morus alba L.) leaves are the predominant food source for silkworm, Bombyx mori L. that has been attacked by number of insect pests and pathogens. Among the sucking pests, thrips, (Pseudodendrothrips mori Niva) is a dominant pest causing enormous damages to mulberry leaves. Rearing of silkworm with thrips infected mulberry leaves affects growth, development and causes to reduce silk production. The present study deals with silkworm larvae fed with thrips infested mulberry leaves on biochemical and economic parameters. The biochemical parameters such as protein, lipid, carbohydrate and glycogen content, were studied in tissues of larvae like haemolymph, silkgland and fatbodies. The result showed that there was decreased in protein, lipid, carbohydrate, glycogen contents, when the larvae fed with thrips infested mulberry leaves than control. Maximum decrease (-53.80%) was noticed in the lipid content. There was also decreased in the economic characters such as cocoon weight (-20.26%), shell weight (-43.75%), shell ratio (-7.48%), filament length (- 30.19%), reliability (-29.28%) and denier (-25.22%)due to feeding of thrips infested mulberry leaves when compared to control.
FATTY ACIDS AND MINERAL CONTENTS ANALYSIS OF SELECTED FINFISHES - Sardinella longiceps AND Scomberomorus guttatus
Authors: GOVINDARAJAN ELANGOVAN , SIVAMANI GANESAN , PANDIAN ARJUN , MARIAPPAN RAMASAMY
Published: February 2023

The marine fishes are extremely contributes to the delivery of fatty acids, macro and micro nutrients in normal food diet, finfishes Sardinella longiceps and Scomberomorus guttatus selected for fatty acids types and minerals composition of S. longiceps, S. guttatus skin muscles were analyzed. The fatty acid composition showed quantitative differences in the percentages of individual acids between the species. Total fatty acids included 41.29% of SFA in S. longicepts, followed by 36.83% in S. guttatus, MUFA content of fatty acids were showed 33.23% in S. guttatus followed by 22.53% in S. longiceps, PUFA fatty acids was high in S. longicepts 36.35%, followed by S. guttatus 28.43%. The minerals (macro, micro and trace mineral) content was estimated, highest amount of sodium content was estimated 432 mg/100 g dry weight basis in S. guttatus followed by in S. longiceps 323 mg/100 g, elevated amount of potassium content from 1251 mg/100 g in S. guttatus followed by in S. longiceps 639 mg/100 g, calcium level uppermost in S. longiceps noticed 269 mg/100 g followed by 167 mg/100 g. Concluded fatty acids, minerals are involved for growth and developments of living beings.
A digitális oktatás face-to-face szóbeli kommunikációjának jellemzői és illemtana
Authors: Dobos Dóra
Published: February 2023

Jelen tanulmány a 2020/2021-es járványhelyzetben bevezetett digitális oktatás kommunikációs etikettjével foglalkozik. Az online kommunikáció és módszertan jelenleg gazdag szakirodalommal rendelkezik, de a face-to-face szóbeli kommunikáció jellemzőinek vizsgálatához kevés tudományos munka áll rendelkezésre. A tanulmány célja a digitális oktatás során kialakult interperszonális kapcsolatok vizsgálata. A kutatás a tanárok tapasztalataira összpontosít. Az adatok felvételét online kérdőív segítette, a kutatásban középiskolákban és általános iskolákban tanító pedagógusok vettek részt (n=140). A felmérés azt vizsgálta, hogy a digitális oktatásban részt vevő pedagógusok milyen elvárásokkal kezdték meg a tanítást, és milyen tapasztalatokat gyűjtöttek az online térben megvalósuló face-to-face kommunikációs helyzetek során. A kutatás választ keresett továbbá arra is, hogy a tanárok milyen felületeket és milyen motivációs eszközöket használtak a személyközi kapcsolatok hatékony fenntartására. A legtöbb tapasztalat a digitális oktatással kapcsolatban negatív volt. A különböző platformok használata, az új munkarendhez való alkalmazkodás, illetve az időkeret betartása voltak az általános problémák. A netikett alapszabályainak betartása és betartatása bizonyos nehézségekbe ütközött (pl. kamera és mikrofon használata). Az eredmények alapján feltételezhető, hogy a magyar közoktatásban nincs egységes protokoll a távolléti oktatás okozta online tantermi kommunikációra. Ilyen protokoll hiánya megnehezíti a tanárok munkáját és a diákokkal való kommunikációt, ami az oktatás hatékonyságának csökkenését eredményezi.
A digitális történetmesélés etikai és jogi vonatkozásai
Authors: Lanszki Anita
Published: February 2023

Az elmúlt évtizedben az oktatási szcéna szinte teljesen területén és művészetalapú részvételi akciókutatási módszerként is megjelent hazánkban a digitális történetmesélés. Tanulók és hallgatók tantárgyi tartalmakat dolgoznak fel a segítségével reflektív módon, emellett a társadalom a perifériáján élő, a mainstream médiában többnyire sztereotipikusan vagy alig ábrázolt személyek önmegjelenítésének jó módszere is. Az állóképekből álló, saját hangon narrált videók különös konstruktumok, mert egyszerre tartalmaznak külső forrásokból származó információkat, vizuális és zenei anyagokat, valamint saját, autobiográfiai elemeket, reflexiókat és képeket is. A videók többségében azonban ritkán jelenik meg a forrásokra való hivatkozás, valamint a saját képek, zenék és a kész videó Creative Commons besorolása. Kérdéseket vet fel az is, hogy hol húzódik a nyilvánosság határa azoknál a digitális történeteknél, amelyek személyes, sőt érzékeny tartalmak artikulációi. De ugyanígy aggályos lehet kiskorúak alkotásának internetes megosztása is. Miközben a tanulók és hallgatók digitális kompetenciájának fejlesztésekor tanárként hangsúlyt fektetünk az alkotásra és a tartalommegosztásra, a kutató pedig örül, ha az adatközlő érzékeny és önazonos információkat oszt meg magáról digitális történetében, elfelejtjük, hogy a digitális történetmesélés oktatási vagy kutatási célú felhasználása során számos etikai, sőt jogi kérdés merülhet fel. A tanulmányban bemutatjuk a tartalommegosztó- és közösségimédia-felületeken nyilvánossá tett digitális történetekre vonatkozó személyiségi és szerzői jogi, valamint az alkotás során felmerülő etikai dilemmákat és megoldási lehetőségeket.
The deformability and thermal treatment for the low alloyed Romanian steel of high resistance
Authors:   Member (c) of TECHNICAL SCIENCES ACADEMY OF ROMANIA, University Politehnica Timisoara, Faculty of Engineering Hunedoara, ILCA IOAN , MILOŞTEAN DANIELA ,   University Politehnica Timisoara, Faculty of Engineering Hunedoara
Published: February 2023

The studies made regarding the elaboration of some low alloyed steels of high resistance refer to the construction of some equipment that has maximum fatigue resistance on different directions, the steel having remarkable tenacity and ductility. In this category one can find the romanian steel 15VMoCr14X, pure in what concerns the gas content (azote, hydrogen) and non-metallic inclusions, having an advanced chemical and structural homogeneity. The characteristics of deformability are studied, which are represented by plasticity and deformation resistance, and the optimum temperature for heat processing is determined. After rolling the 3.6 tone ingots in half-finished products of blum □ shape of 250mm, a fist thermal treatment was applied to re-establish the resulted structure after deformation, which is formed out of ferrite and globular perlite with a bainitic orientation. The obtained granulation was inhomogeneous. Its correction to a more fine and uniform granulation was realized through a second thermal treatment after a previous rolling at a profile of □150mm. From the experimented secondary thermal treatments was chosen for the industrial practice the optimum one. A more homogeneous and finer granulation is observed, which determines an increase of the mechanical characteristics, especially resistance and fatigue resistance.
Decentralized system controlling the phase connection of a single-phase installation
Authors:   Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), MERCIER AURÉLIEN , BERNIER MAHANA ,   Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes), BOUDINET CÉDRIC ,   Univ. Grenoble Alpes, CNRS, Grenoble INP (Institute of Engineering Univ. Grenoble Alpes)
Published: February 2023

In this paper, a phase switching system working in a fully decentralized and autonomous way is proposed. Thanks to this device, named the Automatic Phase Switching (APS) system, the phase connection of a single-phase installation will change automatically during normal operation in order to reduce adverse effects of single-phase loads and Decentralized Generators (DGs) in a low-voltage distribution network, such as voltage unbalance, neutral current, voltage deviation, and network losses. The paper presents the APS system architecture with the inside algorithm and the required decentralized measurements. A self-learning tool to estimate the network local sensitivity, which is essential in the connection phase calculation algorithm, is proposed too. Then, simulation results are presented, where the impact of the APS system is evaluated in many scenarios (DG insertion rate, customer load curve, number of APS systems, etc.). In the last part, a prototype of this connection phase control system is associated with a real single phase installation and evaluated through a Power Hardware in The Loop (PHIL) real-time simulation.
On the acoustic invisibility
Authors:   Dept. of Mechatronics and System Dynamics, Technical University of Cluj-Napoca, BRISAN CORNEL , MUNTEANU LIGIA ,   Dept. of Mechatronics and System Dynamics, Technical University of Cluj-Napoca, CHIROIU VETURIA ,   Institute of Solid Mechanics, Romanian Academy, Bucharest, Romania
Published: February 2023

Over the past decade a great attention has been paid to the modeling and simulation of making objects invisible or deaf to noise. The recent results have enlightened the mode of control and handling the invisibility and cloaking to noise using the metamaterials engineered at the subwavelength scale in order to interact with acoustic field in a way that traditional materials do not. The acoustic invisibility is based on the property of acoustic equations to be invariant under a spatial compression that means a manipulation of the material parameters. In this paper, the sound invisibility performance is discussed for spherical cloaks. The original domain consists of an alternation of layers made from piezoelectric ceramics and epoxy resin, following a triadic Cantor sequence. The spatial compression, obtained by applying the concave-down transformation, leads to a metamaterial layer with an inhomogeneous and anisotropic distribution of the parameters.
Low-velocity impact testing of foam core sandwich panels
Authors:   Military Technical Academy, Bulevardul George Coşbuc nr. 39-49, Bucharest, Romania, MOCIAN OANA ALEXANDRA , CONSTANTINESCU DAN MIHAI ,   University POLITEHNICA of Bucharest, SANDU MARIN ,   University POLITEHNICA of Bucharest
Published: February 2023

Sandwich panels with aluminum facesheets and polyurethane or polystyrene foam core were tested in impact on an Instron Ceast 9340 impact tower with a total mass of 13.15 kg at initial velocities from 1.5 to 4.5 m/s. The faces were made from Al 6082-T6 sheet with a thickness of 1.5 mm and the thickness of the polyurethane panel (Necuron 100 core of density 100 kg/m3 ) and of the polystyrene panel (commercial extruded polystyrene core of density 32 kg/m3 ) were 15 mm, respectively 15 and 22 mm. The important events took place in less than 15 ms. Particularities of the impact response of the panels were observed and discussed. The influence of the speed of impact was analyzed for both types of panels. The contact force variation during impact has a different evolution as being modified by the core behavior.
The cement industry in the context of circular economy
Authors:   Ceprocim S.A. Bucureşti, PUŞCAŞU DORU VLADIMIR , GEORGESCU MARIA ,   Universitatea POLITEHNICA Bucureşt, ROHAN MIHAI ,   CIROM Bucureşti
Published: February 2023

The concept of circular economy, assumed in the last years, comes to replace the concept of linear economy, characteristic for most of technologies. The circular economy implies the valorization within the fabrication process of certain wastes resulted from that or from some other technological processes, as well as their preservation for as long time as possible in the process of materials producing. This concept is now also applied to the cement and concrete industry, with favorable consequences both on natural resources (raw materials and fuel), and on the environment.
Fabrication and characterization of LDPE and HDPE filaments for 3D printing
Authors:   Center of Excellence Polymer Processing, Dunarea de Jos University, Galati, Romania, STANCIU NICOLETA-VIOLETA , STAN FELICIA ,   Center of Excellence Polymer Processing, Dunarea de Jos University, Galati, Romania, FETECAU CATALIN ,   Center of Excellence Polymer Processing, Dunarea de Jos University, Galati, Romania
Published: February 2023

Filament material is an important factor to be considered in the product development by 3D printing, since it can affect not only the quality but also the functionality of the printed parts. Thus, the objective of this paper is to investigate how feasible would be to use low- and high-density polyethylene to fabricate 3D printing filaments. Since the extrusion process depends on the rheological behavior of the polymers, first, the melt viscosity of LDPE and HDPE was analyzed by capillary rheology. Then, LDPE and HDPE filaments of 1.75 mm diameter were extruded under different processing conditions and subjected to tensile tests to determine the mechanical properties. Results showed that the LDPE and HDPE are suitable for manufacturing 3D printing filaments if the extrusion processing conditions are optimized.
Corrosion of some candidate structural materials for lead fast reactors
Authors:   Technologies for Nuclear Energy State Owned Company (RATEN) Institute for Nuclear Research Pitesti (RATEN ICN), LUCAN DUMITRA , VALECA ŞERBAN CONSTANTIN ,   "1Technologies for Nuclear Energy State Owned Company (RATEN) Institute for Nuclear Research Pitesti (RATEN ICN), Campului no.1, Mioveni, POB 78, Arges, Romania 3Universitatea din Piteşti, Piteşti, România 4Academy of Technical Sciences of Romania ASTR, Dacia Avenue no.26, Bucharest,Romania 5The Academy of Romanian Scientists AOSR, Splaiul Independentei Street no.54,Bucharest, Romania", JINESCU GHEORGHIŢA ,   "2 Politehnica University of Bucharest, Polizu Street no. 1-7, Bucharest, Romania 4 Academy of Technical Sciences of Romania ASTR, Dacia Avenue no.26, Bucharest, Romania"
Published: February 2023

Among the six types of reactors of great importance for Generation IV, at European level, is the Lead Fast Reactor (LFR). The most challenging aspect of lead - based technology is the corrosive nature of this liquid metal that requires careful oxygen control and the use of structural materials with high corrosion resistance. The purpose of this paper is to present the structural materials of the main equipment from a LFR and to describe the processes related to their degradation. The paper contains experimental results obtained through the exposure of structural materials in the presence of liquid lead. After testing, the materials were analysed by visual examination, optical microscopy and microhardness determinations. The paper also presents new research directions to be approached in order to know in detail the processes that occur when the metallic materials come into contact with liquid lead.
Experimental research on some modern technologies and materials applied in prosthetic dentistry
Authors:   Faculty of Mechanical and Mechatronics Engineering, Department of Mechatronics and Precision Mechanics, POLITEHNICA University of Bucharest, MORARU EDGAR , BESNEA DANIEL ,   Faculty of Mechanical and Mechatronics Engineering, Department of Mechatronics and Precision Mechanics, POLITEHNICA University of Bucharest, SPÂNU ALINA ,   Faculty of Mechanical and Mechatronics Engineering, Department of Mechatronics and Precision Mechanics, POLITEHNICA University of Bucharest
Published: February 2023

The paper presents some modern techniques for dental prostheses and prosthetic dental prototypes - technologies by adding material. Several dental prostheses have been obtained using different additive technologies, high-quality metal and polymeric materials, including biocompatible materials. There were presented the technologies, such as: selective laser melting for metallic dental prostheses, thermoplastic extrusion and vat photopolymerisation for polymeric prosthetic dental models. These manufactured prosthetic elements have considerable advantages over those manufactured by conventional fabrication processes.
Guaranteed versus real service life of PV panels in Romania
Authors:   National Institute for R&D in Electrical Engineering ICPE-CA, Department of Renewable Energy Sources and Energy Efficiency, MURGESCU ION , EL-LEATHEY LUCIA-ANDREEA ,   National Institute for R&D in Electrical Engineering ICPE-CA, Department of Renewable Energy Sources and Energy Efficiency, CHIHAIA RAREŞ-ANDREI ,   National Institute for R&D in Electrical Engineering ICPE-CA, Department of Renewable Energy Sources and Energy Efficiency
Published: February 2023

The paper briefly describes the degradation mechanisms of photovoltaic panels (PVs) in solar plants. After a short presentation of the nature and statistical distribution of defects, structured by type of defect, based on the data processed by TUV Rheinland globally, the paper presents in chapters 3 and 4 data collected and analysed from photovoltaic parks in Romania. This analysis is the starting point for a comprehensive study of the behaviour of photovoltaic parks between 2013-2016, which aims to present equipment nonconformities, design and execution flaws, their causes and effects on energy production and the return rate on investments. At the same time, solutions c*ould be also provided in order to troubleshoot and repower the equipment, as well as effective preventive maintenance solutions, with permanent monitoring of the photovoltaic parks status, including the power degradation rate of PV panels. Documentation elaborated by the ICPE-CA Photovoltaic Systems Laboratory (PV-LAB) team was used to prepare this paper, especially inspections reports and measurements performed in photovoltaic parks in the last two years as a result of a research project carried out in Romania. Also, well-documented papers, developed within the Task 13 - Performance and Reliability of Photovoltaic Systems of the IEA-PVPS Program of Photovoltaic Energy (IEA-PVPS) were used. The purpose of the paper is to raise awareness regarding the problems that can occur during the operation of a PV park before the point where the degradation becomes significant with very high repair costs.
Application of risk analysis in drilling well problems and operations- field case study
Authors:   Cairo University, Egipt, HALAFAWI MOHAMED , AVRAM LAZĂR ,   Petroleum-Gas University of Ploiesti
Published: February 2023

The objective of this paper is to present specific drilling problems and their solutions, and then apply risk analysis for them. Drilling data for actual drilled wells and performing the risk analysis resulted in medium risk for the most operations done before starting the drilling process. Drilling well operations showed a various risky levels for operations. Formation problems that resulted from a constantly formation /fracture pressures curves may sometimes lead to not being able to select the casing setting depth CSD, and use high rate of penetration ROP without logging may provide a good results. The application of this method resulted in a proper selection of CSD for two drilling wells (I) and (II). In addition, the treatment of a large layer of shale formation X2 for well (I) was done by using common methods to prevent shale problems but these methods will add another 5-6 days to the number of drilling days. However, the proposed high ROP method, without logging, and with quick cementing and casing operations is almost perfect and leads in reducing the drilling hole days by 5-6 days for well (I), and that’s why the final drilling hole days will be 59 days instead of 65 days. Another real drilling well case which is suffering from a lot of well problems was controlled using suitable methods and the required mud additives to all geological sections safely drilled.
Computer Based Recitation Program Development With Feed Back in Newton’s Law Topic
Authors: Auna Hidayati Rahma , Taqwa Muhammad Reyza Arief
Published: February 2023

This research was conducted to develop a recitation program on Newton's law and to test its practicality. This type of research is Research and Development (R&D) with a Four-D (4D) model with stages, namely Define (defining), Design (design), Develop (development), and Dissemenate (dissemination). The research subjects were 38 third semester physics students at the State University of Malang. Data collection techniques were carried out by means of media validity test questionnaires and content validity tests given to 2 validator lecturers, as well as practicality test questionnaires and perception questionnaires on the use of each item given to students. The data generated is the percentage of the assessment of the validity test, practicality test, and student perception questionnaires, as well as suggestions given by lecturers and students related to the recitation program. This research resulted in a recitation program in which there were 38 questions accompanied by feedback. The results of the content validity test obtained a value of 95.7%, while the results of the media validity test obtained a value of 93.75% so that it was included in the very valid category. Then, the results of the practicality questionnaire show that students agree that the recitation program can make it easier to understand Newton's law concepts, help strengthen their understanding of Newton's law concepts, and this program is interesting for them. Meanwhile, based on the results of the student perception test regarding the use of items, the average score was 96.6%, which means that the questions, feedback, and discussion videos in the recitation program are very easy to understand.
Analyze students learning interest in the subjects they like
Authors: Siregar Tifany Intania , Anilafiza Ufistia , Atia Saniatul , Lestari Hafifah Indah
Published: February 2023

The purpose of this study was to determine the effect of the talents and interests of students based on the subjects and teachers they liked on the students of Madrasah Ibtidaiyah Nurul Yaqin Simoang Sungai Durendan as well as on the learning outcomes and achievements of students in grade 6.B. This study used qualitative methods .population with a total sampling of 22 students/i, the most preferred subject is Corner with a total of 72%.interests in learning to follow the learning of class VI students of Madrasah Ibtidaiyah Nurul Yaqin Simpang Sungai Duren are very diverse. Starting from those who are very enthusiastic in participating in learning to those who are less enthusiastic in participating in learning. The learning interest of these students is also influenced by the way of teaching and learning methods used by the teacher. In this case, the more interesting the teaching method given by a teacher, the more enthusiastic the students will be in participating in the teaching and learning process in the classroom. Students' interest in learning is also influenced by the subjects they like and dislike. The ability of students to receive learning material is different. Therefore, it is necessary to analyze students' and students' learning interest based on their preferred subjects and teachers. This is done to improve the quality of the teacher's teaching and also to better understand the ability of students to receive learning.
Casual Factors and Sanctions For Disciplinary Violation Of School Rules
Authors: Amelia Nadila , Amelia Nisa , Nurhaliza
Published: February 2023

This study discusses the factors that cause disciplinary violations against governance school rules and sanctions. This research is motivated by the effectiveness of the procedure discipline in enforcing student discipline in schools. As is known that the rules in the school environment are a set of rules and regulations that have been made by the school to create a conducive and representative atmosphere in the school environment. This type of research is qualitative research. As for who became the population of the research subjects was students of MAN 2 Jambi City, Kec. South Jambi, taking the sample in the form of 31 people consisting of 26 female students and 5 students. Instrument data collection in this study by distributing questionnaires. Then for data analysis use the google form that has been distributed to the samples. The results of this study data obtained that the factors causing disciplinary violations of school rules are the need and the biggest sanction given in the form of a warning letter.
Design of three-stage sealing structure and investigation of sealing performance for 7000 fracturing plunger pump
Authors: Du Mingjun , XI Jianqiu , Liu Youping , Hou Yongjun , Li Huachuan , Yang Xiaopeng , Wang Zhixi , Dai Qiping , Duan Ping , Zhao Mingjian , Jiang ShiKai
Published: February 2023

As a key component of the drilling mud pump, the plunger seal often has problems such as seal failure in reconstruction of low-permeability sandstone reservoirs and the development of unconventional reservoirs, which, in turn, leads to low efficiency of drilling mud pumps and even great potential safety hazard. Based on this, this paper designs a three-stage sealing device at the hydraulic head for the 7000 fracturing plunger pump, and analyzes the sealing performance of the system. The effects of different working loads of the hydraulic head and axial pre-tightening force on the contact force of the seal ring and the stress distribution in the seal ring are explored, and the sealing effect of the three-stage seal of the fracturing plunger pump is confirmed. The results show that the peak stress and the peak contact pressure of the three rubber rings increases with the increasing of the working load of the hydraulic head; the peak stress and the peak contact stress of the three rubber rings during the installation process increase with the increase of the installation pre-tightening force. But the equivalent stress peak and the contact stress peak are directly related the fluid load under the action of the working fluid load; the maximum contact force of the rubber during the sealing process of the system is greater than that of the system working medium under different working fluid pressures. With internal pressure, the three sealing rubber rings can play a sealing role to varying degrees in sequence, and increasing the total life of the sealing body.
Der Interessenkonflikt zwischen Eigentum und Urheberrecht beim Architekturwerk in Deutschland, der Schweiz und in England
Authors: Abt Jana
Published: February 2023

The work deals with the conflict of interest between ownership and copyright in in architectural works. The legal systems of Switzerland and the United Kingdom are taken into account by way of legal comparison. The opposing positions are classified in terms of fact, constitutional law, contract law and copyright law. The requirements for copyright protection for architectural works are discussed as well as more construction-specific questions of the permissibility of reconstruction, the alteration of buildings and the demolition of buildings.
Die Sanktionierung des Umgangs mit Alkohol und Cannabis
Authors: Maubach Franziska
Published: February 2023

The thesis subjects the use of alcohol and cannabis to a comparative criminological and normative examination. The criminological study analyzes empirical findings on the extent and effects of the consumption of alcohol and cannabis. The normative analysis examines the various (mainly criminal) regulations on the consumption of or dealing with the substances for similarities and differences in the legal treatment of alcohol on the one hand and cannabis on the other. The results found are then examined for their criminological-scientific justification against the background of empirical findings. Any discrepancies that are identified form the basis for considerations de lege ferenda.
Microbial Fuel Cell Formulation from Nano-Composites
Authors: Anjum Fozia , Akram Nadia , Gul Khan Samreen , Akhter Naheed , Shahid Muhammad , Hussain Fatma
Published: February 2023

Petroleum and oil industry is a rich source of nonrenewable energy that ultimately results in threatening of ecosystem due to emission of greenhouse gases into the environment. In the current panorama of the energy demand, industries focus on alternate and renewable energy resources to meet energy gaps. Thus, an expedient fuel cell based on microbes can be valued as an economical and ecofriendly substitute of energy generator. These microbial fuel cells have commercialized platinum electrodes to generate cost-effective energy after oxidation of organic wastes catalyzed by biocatalyst. Nowadays, conventional carbon electrode as an anode is taking popularity in microbial fuel cell but displays poor performance. So, to improve the chemistry of electrodes, nano-composites fabricated from polar polymeric material as well as cost-effective oxides of metals are the raw material. In this chapter, green synthesis of nano-composites from conducting polymers and oxides of transition metals has been discussed. Anode modification by composite to treat wastewater as well as its role to generate electricity has been discussed briefly.
Acute Post-Operative Pain Management
Authors: Khatib Samina , S.N. Razvi Syed , M. Shaikh Mudassir , Moizuddin Khan Mohammad
Published: February 2023

Despite major advances in the field of anesthesia and medicine, postoperative pain continues to be undermanaged in a significant proportion of patients. The consequences of undermanaged pain are deleterious for both patients and the healthcare system. This review aims to give the readers a practical and updated approach to acute postoperative pain management. This chapter deals with the definition of pain, the physiology and pathophysiology of pain, and various approaches to the management of acute pain. A review of the literature was done to understand the methods of pain management with a major focus on the literature of the last decade (2010–2022). A literature search was done on PubMed and Google Scholar using keywords “acute postoperative pain” and “pain physiology.” The research papers on the basics of pain physiology, the prevalence of acute post-operative pain and methods of acute postoperative pain management were reviewed. A brief practical approach for acute postoperative pain using pharmacological and non-pharmacological approaches and a brief discussion have been done on the approach for special group of patients. The management of acute postoperative pain can be done using various pharmacological and non-pharmacological methods. The approach for each patient has to be tailored depending on the individual patient’s needs.
Modern Times in Point of Care Diagnostics
Authors: Paans Wolter
Published: February 2023

This chapter describes the growing influence of point-of-care diagnostics (POCD) on the daily lives of citizens, their immediate families, and healthcare providers. With a view to the future, the most important contemporary developments in this field are discussed, such as noninvasive sensor technology in the diagnostic process, practical examples of point-of-care diagnostics (POCD), including the quantify-self movement and infrared technology. Cost-effectiveness, adoption of POCD, and the contribution of POCD innovations to self-management and health literacy are also discussed. Developments in which deep learning and artificial intelligence are used to make the diagnostic results more reliable are also conferred, such as the development of point-of-care Internet diagnostics. The discussion of professional advice dilemma’s in POCD, the patient’s appreciation of POCD, and ethical and philosophical considerations conclude this chapter.
Controlling Corrosion Using Non-Toxic Corrosion Inhibitors
Authors: Rehioui Malak
Published: February 2023

Corrosion of metals and its alloys destroys our properties, our environment, and our lives. Thus, corrosion control includes a range of developed treatments that take into account material properties, environmental characteristics, and process cost. Typical corrosion inhibitors are known for their excellent efficiency and show great promise. However, they become less used because they cause serious toxicity issues on the environment and affect human and animal health. In recent years, research has intensified on the development of green chemistry technologies, which offer new methods of synthesis and extraction of various non-toxic materials (plant extracts, oils, amino acids, rare earths, etc.), which are highly effective, environmentally acceptable, economical and easily available inhibitors. This chapter deals with a description of corrosion inhibitors with a particular emphasis given to the discussion on the different characteristic features of the green corrosion inhibitors reported in the literature as a comparative view of toxic inhibitors.
Comparison of Perioperative Pregabalin and Duloxetine for Pain Management After Total Knee Arthroplasty: A Double-Blind Clinical Trial
Authors: Imani Farnad , Emami Azadeh , Alimian Mahzad , Nikoubakht Nasim , Khosravi Niloofar , Rajabi Mehdi , Hertling Arthur Christopher
Published: February 2023

Background: Chronic residual pain after total knee arthroplasty (TKA) is one of the challenges of postoperative pain management. Duloxetine, by controlling neuropathic pain, and pregabalin, by affecting nociceptors, can effectively manage postoperative pain. Objectives: This study aimed to compare the effect of perioperative oral duloxetine and pregabalin in pain management after knee arthroplasty. Methods: In this clinical trial, 60 patients scheduled for TKA under spinal anesthesia were randomly assigned to one of three groups A (pregabalin 75 mg), B (duloxetine 30 mg), and C (placebo). Drugs were administered 90 minutes before, 12, and 24 hours after surgery. The visual analog scale (VAS) score for pain, the first analgesic request time, postoperative analgesic consumption (i.v. paracetamol), and WOMAC score six months after surgery were recorded. Results: The VAS score and analgesic consumption 48 hours after TKA in groups A and B significantly decreased compared to the placebo (P < 0.05). The first analgesic request time was longer in groups A and B than in group C (P < 0.05). While the differences were statistically significant, they are most likely not clinically significant. The WOMAC score before and six months after arthroplasty did not differ between the groups (P > 0.05). Conclusions: Perioperative oral pregabalin and duloxetine similarly reduce pain and the need for analgesic consumption within 48 hours after TKA but do not affect knee mobility status.
MALAYSIAN PEACEKEEPING OPERATIONS IN CONGO AND SOMALIA: AN OVERVIEW AND CHALLENGES
Authors:   National Defence University of Malaysia, Abd Razak Najjah Salwa , Nik Ramli , Mhd Ramli Mhd Faizal ,   National Defence University of Malaysia, Abdullah Haslinda
Published: February 2023

Malaysia is one of the countries deployed as peacekeepers in Congo and Somalia. The credibility of Malaysian peacekeepers is undeniable as Malaysia keeps gaining recognition at the international level. However, the successes of Malaysian peacekeepers still need to be explored, particularly the previous deployments as well as the current ones. Thus, this paper focuses on the capability of Malaysian peacekeepers assigned in Congo and Somalia. The researchers explore the challenges and efforts of Malaysian peacekeepers towards accomplishing their tasks. This is a multiple case study comprising a series of interviews and library research for data triangulation and thematic analysis. The findings show that the Malaysian peacekeepers deployed in Congo and Somalia apply diverse ways in order to carry out their tasks effectively with some early exposure from their training in Malaysia. There are numerous differences on how they adapt with their tasks from different countries of deployments. The guidelines pertaining to this study are presented as a dimension of prior deployment that is still relevant to the present deployments.
Hermenéutica y pedagogía. La práctica educativa en el discurso sobre la educación
Authors: García Bravo William , Martín Sánchez Miguel A.
Published: February 2023

En el presente trabajo reflexionamos sobre la re¬lación que existe entre la práctica educativa y el discurso teórico sobre la práctica. Partiendo de un planteamiento hermenéutico, analizamos la relación que en pedagogía existe entre los temas de la certidumbre, la validación y la evidencia en los métodos cualitativos. En este sentido, la propuesta de un «círculo hermenéutico de inter¬pretaciones», para la comprensión de un texto o una práctica educativa que es susceptible de ser leída como un texto, es un predicamento que no resuelve del todo la tarea mencionada. Proponemos un nivel de validación que permita romper el círculo de libres interpretaciones, llegando a alcanzarlo a través del análisis y la re-flexión de tres caminos: la fuerza del argumento, el consenso de los científicos y la práctica educa¬tiva. Se concluye con la idea de que la práctica educativa misma es la mejor fuente de validación de la teoría.