bluuebunny/crossref_metadata_2025 huggingface dataset:
Improvement on Impact Toughness of Cold Formed S420 Steel by Direct Quenching
Authors: Kaijalainen Antti , Mourujärvi Juho , Tulonen Juha , Steen Petteri , Kömi Jukka I.
Published: January 2021

The aim of this work is to study the effect cold forming rate (CFR) on the mechanical properties and microstructure of a conventional TMCP and a direct-quenched steel in 420 MPa strength level. The microstructure was characterized using FESEM-EBSD. Tensile properties and Charpy-V impact toughness were determined. As the CFR increased, the yield and tensile strength raised quite linearly with both steels. Yield strength values increased from 450 MPa (as-rolled material) to 700 MPa (25 % CFR). However, tensile strength increased less compared to yield strength. Uniform elongation decreased linearly till about 10 % CFR and total elongation till about 15 – 20 % CFR. The impact values decreased quite linearly in -40 °C and -60 °C test temperature when the cold forming rate increased. In longitudinal direction (L-T) the impact values were at high level at -40 °C and -60 °C with both steels with all CFR. In transverse direction (T-L) the impact results were lower. Impact energies were enhanced by direct quenching compared to conventional steel in every CFR stage. EBSD results showed no major difference between steels in the grain sizes in generally. However, cold forming decreased the grain size and increased low-angle grain boundaries in correlation with increasing CFR. Small size of the coarsest grains (d90%) usually indicate better toughness, however in this case the impact values were decreased even with smaller grain size as cold deformation occurs. On the other hand, the strength level increased with forming rate. Therefore, a brief discussion of the microstructural features controlling the impact toughness is given.
Investigation of Temperature Evolution and Flash Formation at AA5083 Studs during Friction Surfacing
Authors: Kallien Zina , Rath Lars , Roos Arne , Klusemann Benjamin
Published: January 2021

Friction surfacing (FS), a solid-state joining process, is a coating technology for metallic materials. Frictional and plastic deformation enable the deposition of a consumable material on a substrate. Process temperatures stay below the melting point of the consumable material and are an important factor determining the quality of the resulting deposit. The focus of the current study is the experimental analysis of the flash formation and the temperature evolution in consumable studs during FS deposition of dissimilar aluminum alloys. The main process parameters, axial force, rotational speed and travel speed, were varied while the setting of the process surrounding was kept constant. The temperature evolution for the applied process parameter combinations are investigated for the stud material via infrared camera. The results show that the choice of applied force, rotational speed and travel speed did not lead to significant changes in maximum process temperature values of the consumable stud detectable via infrared camera. However, the flash formation at the tip of the plasticized stud shows significant differences for varied process parameters. Especially reduction of travelspeed or increase in axial force led to formation of larger flashes. Since the material that is pressed out of the process zone into the flash is not deposited on the substrate, the flash formation can be linked to the material efficiency of the FS process.
Effect of Heat Treatment on Structure and Properties of Martensite Stainless Steel for Ice-Class Ships Obtained by Direct Laser Deposition Method
Authors: Klimova-Korsmik Olga G. , Mendagaliyev R.V. , Tsibulskiy I.A. , Zotov O.G. , Korsmik R.S. , Lebedeva Nadezhda Valerievna
Published: January 2021

At present, to increase competitiveness of shipyards for manufacturing of shipbuilding parts new high technologies are used. Additive production methods, including direct laser deposition (DLD) technology, which meets all the requirements of competitiveness, are increasingly being applied. Heavy-duty large-size parts such as propellers, blades, hubs and other critical parts used in shipbuilding have become possible to produce with DLD. In the process of DLD it is possible to produce parts, including shipbuilding steels used in the Arctic conditions, with the required mechanical characteristics not inferior to similar brands of materials obtained by casting or plastic deformation methods. The work is devoted to research of thermal process influence on structure and mechanical properties formation of deposited samples from steel powder 06Cr15Ni4CuMo. Features of formation of microstructure components by means of optical microscopy, X-ray structure analysis (XRD) are investigated, and also CCT diagram is constructed. Tensile and impact toughness tests have been conducted. As a result, it was found that the material obtained by the DLD method in its initial state significantly exceeds the strength characteristics of heat-treated castings of similar chemical composition, but is inferior to it in terms of plasticity and viscosity. The increase of viscosity and plasticity up to the level of cast material in the grown samples is achieved during the subsequent heat treatment, which leads to the formation of the structure of tempered martensite and reduction of its content in the two-stage tempering in the metal structure. The strength of the material is also reduced to cast metal after heat treatment.
Cold Spraying of IN 718-Ni Composite Coatings: Microstructure Characterization and Tribological Performance
Authors: Biagi Roberto , Verna Elisa , Kazasidis Marios , Bemborad Edoardo , Galetto Maurizio , Yin Shuo , Lupoi Rocco
Published: January 2021

INCONEL 718 superalloy (IN 718) is frequently used in highly aggressive environments, such as aerospace and gas turbine engines, where excellent mechanical properties, creep-, fatigue- and oxidation-resistance performance at high and cryogenic temperatures are required. Recent studies have successfully cold sprayed IN 718, showing great potential mainly in maintenance and repairing fields. However, due to the low plastic deformation, the manufacture of IN 718 cold sprayed coatings often requires the use of expensive propulsive gases or high working parameters to enhance deposition efficiency, with a significant increase in production costs. This paper investigates for the first time the addition of Ni to IN 718 powders in order to increase plastic deformation and interparticle bonding strength. Four composite coatings were deposited via a high-pressure cold spray process using nitrogen as propulsive gas, considering different IN 718 mass fractions in the feedstock: C1 (0 wt%), C2 (25 wt%), C3 (50 wt%), C4 (75 wt%). The coatings are examined in terms of microstructural characteristics and tribological performance. The addition of IN 718 particles significantly improves the mechanical properties of the coatings, despite an increase in porosity, which however does not exceed 1%. The tribological performance of the four coatings is investigated using a pin-on-disk test, demonstrating that the coating wear resistance behaviour improved as the IN 718 content increased. Analysis of the wear mechanism shows that C4 coating has a different wear behaviour than the other coatings, thus achieving the best wear-resistance performance.
Effect of Hot Processing on Mircrostructure and Properties of Flat Billets of TA15 Titanium Alloy
Authors: Min Xin Hua , Jin Cheng
Published: January 2021

In this paper,effect of the different forging processes on the microstructure and mechanical properties of the flat flat billets of TA15 titanium alloy was investigated.The flat billiets of 80 mm×150 mm×L sizes of TA15 titanium alloy are produced by four different forging processes.Then the different microstrure and properties of the flat billiets were obtained by heat treatment of 800 °C~850 °C×1 h~4h.The results show that, adopting the first forging temperature at T1 °C、slow cooling and the second forging temperature at T2°C 、quick cooling, the primary αphases content is just 10%, and there are lots of thin aciculate phases on the base. This microstructure has both high strength at room temperature and high temperature, while the properties between the cross and lengthwise directions are just the same. So the hot processing of the first forging temperature at T1 °C、slow cooling and the second forging temperature at T2°C 、quick cooling is choosed as the ideal processing for production of aircraft frame parts.
Activities of Non-Basal Slips in Rolled Mg-Li and Mg-Ce Alloys Sheets
Authors: Miyano Haruka , Takemoto Keisuke , Kitahara Hiromoto , Ando Shinji
Published: January 2021

In this study, tensile tests of rolled Mg-Li alloy and Mg-Ce alloy sheets were carried out at room temperature to investigate effects of alloying additions on the relationship between mechanical properties and activities of slip systems in magnesium polycrystals. In Mg-Li alloy, ductility increased while strength decreased by lithium addition. Frequency of non-basal slips increased with increasing lithium content. In Mg-Ce alloy, strength and ductility were similar pure magnesium, and non-basal slips were hardly activated. Since critical resolved shear stress of non-basal slips were decreased by lithium addition, ductility of magnesium was increased while its strength was decreased.
How to Master Interfaces in MMCs with Reactive Constituents
Authors: Edtmaier Christian
Published: January 2021

It is evident that the interface in MMCs plays a crucial role with respect to thermophysical and mechanical properties of the composites. Inert systems like copper/carbon or silver/carbon will have low performance due to a very weak bonding between the constituents, whereas in reactive systems like Al/carbon, Fe(Ni)/WC and WC-Co/diamond the interfacial reaction has to be clearly controlled to avoid uncontrolled reactions. Such reactions may lead to partial or even complete dissolution of the phases and thus can have very detrimental impact on properties. In this contribution, we will summarize and present different approaches and recent results to overcome any interfacial problems. This can be either technological parameters like time, temperature, rate of consolidation, contact time in infiltration or inherent parameters like nominal composition, coatings, and surface terminations. It is of general interest to adjust optimal interfacial conditions for each application to achieve ideal properties in the composites.
Influence of Hot Pressing Sintering Temperature on the Properties of Low-Density Al0.5NbTa0.8Ti1.5V0.2Zr Refractory High-Entropy Alloy
Authors: Moravcikova-Gouvea Larissa , Kovacova Zuzana , Kitzmantel Michael , Neubauer Erich , Jan Vít , Dlouhy Ivo
Published: January 2021

In this work, the low-density Al0.5NbTa0.8Ti1.5V0.2Zr RHEA prepared by mechanical alloying combined with hot uniaxial pressing (HP) was investigated. The alloy was subjected to different sintering temperatures on the range of 1200°C up to 1600°C, while keeping a constant densification time. The influence of the increase in sintering temperatures on the RHEAs’ microstructural features, composition and basic mechanical properties was explored by means of x-ray diffraction and scanning electron microscopy, hardness testing, density determination by Archimedes’ principle and elastic moduli by ultrasonic measurements. Full density samples were obtained in all sintering temperatures. The alloy has shown a homogeneous distribution of phases, with presence of dispersed oxides inside the matrix, leading to a fine grain size distribution due to grain-boundary pinning effect, even during the exposure of the alloy at the highest sintering temperature. The mentioned effect is responsible for the achievement of high-hardness in all conditions. Powder metallurgy has been shown to be an advantageous technique for production of alloys for high-temperature applications, as the inherent in-situ formed oxides homogeneously distributed within the matrix may be beneficially used as reinforcement, thus potentially enhancing the mechanical properties of the parts.
High-Temperature Tribological Properties of ReB2-Based Ceramic/Si3N4 Sliding Pairs
Authors: Murakami Takashi , Ohana Tsuguyori
Published: January 2021

Our group prepared an ReB2-based ceramic with a composition of Re-74.5at% B to investigate its microstructure, high-temperature microvickers hardness, and high-temperature tribological properties in air. The microvickers hardness of the ReB2-based ceramic was higher than 2600 at temperatures below 1073 K. The friction coefficients of ReB2-based ceramic/Si3N4 sliding pairs were stable and low (≃ 0.15) at 1073 K. We concluded that the low friction coefficients of the sliding pairs resulted from the formation of low-friction hexagonal BN and B2O3 films. The friction coefficients of the ReB2-based ceramic/Si3N4 sliding pairs were also low at 298 K (≃ 0.3 to 0.4) and 1273 K (≃ 0.1), but were unstable and high ( 0.6) at 673 K.
Homemade Cardiac and Vein Cannulation Ultrasound Phantoms for Trauma Management Training in Resource-Limited Settings
Authors: AI-Hadidi Ameer , Amine Mukarram , Batman Amir , Hakmeh Wael
Published: January 2021

Ultrasound has become an essential skill for trauma management in resource-limited areas. Prohibitive costs of commercial ultrasound phantoms limit the abilities of many hospitals to adequately train health-care providers. We assessed the utility of homemade phantoms in a wartime setting. Thirty physicians and technicians enrolled in a medical training course, sponsored by the Syrian American Medical Society (SAMS). Ultrasound simulation models were created onsite by using psyllium, gelatin, a hotel coffee maker, and Pyrex dishes. Lamb hearts were used to teach visual diagnosis and subsequent drainage of pericardial effusions. Penrose drains were used to teach vein identification and cannulation under dynamic ultrasound guidance. Two phantoms with a total of 14 penrose drains were created, serving 30 health-care providers. Feedback from participants was positive and within one month of the course, two cases of pericardial tamponade were diagnosed and surgically treated in the largest trauma hospital operated by SAMS. Context: In resource-limited environments, ultrasound phantoms (models) are cost-prohibitive. Aims: We assessed the utility of homemade phantoms in a resource-limited wartime setting to train Syrian physicians and technicians in vein cannulation and limited cardiac ultrasonography. Settings and Design: Thirty physicians and technicians enrolled in a medical training course, sponsored by SAMS. Methods: Ultrasound simulation models were created onsite by using psyllium, gelatin, a hotel coffee maker, and Pyrex dishes. Lamb hearts were used to teach visual diagnosis and subsequent drainage of pericardial effusions. Penrose drains were used to teach vein identification and cannulation under dynamic ultrasound guidance. Two phantoms with a total of 14 penrose drains were created, serving 30 health-care providers. Statistical Analysis Used: N/A Results: Feedback from participants was positive and within one month of the course, two cases of pericardial tamponade were diagnosed and surgically treated in the largest trauma hospital operated by SAMS. Conclusions: Homemade ultrasound phantoms are a promising cost-effective means for meeting an educational gap in ultrasound training, particularly for resource-limited hospitals and possibly more broadly in residency education.
Hematological Profile in COVID-19, Whether It Matters in Children
Authors: Margekar Purnima , Kumar Ashok , Margekar Venu Gopal , Margekar Shubha Laxmi
Published: January 2021

Coronavirus disease 2019 (COVID-19) is an acute respiratory and systemic illness, and is a public health emergency which has involved all the continents. Though limited data is available for infection in pediatric population, infection seen in children is of milder form. During this pandemic, documentation of laboratory predictors to discriminate between mild and severe forms of this infection would be helpful. Various hematological parameter alterations in the pediatric COVID-19 cases show anemia, thrombocytopenia, eosinopenia, and inconsistent leukocyte indices. It may be too early to say right now as to what extent will these alterations help us in outlining the severity of disease or transmission of disease. However, it will be pertinent to understand these abnormalities, and keep track of them, so as to understand the disease, as the pandemic unfolds.
Post-COVID-19 Guillain-Barre Syndrome
Authors: Sud Ritika , Verma Jyoti , Goswami Shubham , Aggarwal Niharika , Gurtoo Anil
Published: January 2021

SARS-CoV-2, the causative agent for COVID-19, originated in China in the fall of 2019 and soon became a pandemic engulfing the entire world, presenting with a myriad of presentations from asymptomatic to severe disease with acute respiratory distress syndrome and multiple organ dysfunction and severe inflammatory response. Little is understood about the new virus and its pathogenesis, and it is too early to ascertain its long-term sequelae at this point in time. New associations and clinical problems keep appearing with the new virus and thus we also got to encounter three cases of acute inflammatory demyelinating polyneuropathy (AIDP) in patients following COVID-19 infection. This case series aims to convey clinicians that AIDP can be seen in patients with COVID-19, particularly during the recovery phase, and thus not to miss it as postviral fatigue and malaise.
Phylogeographic Resolution of the Barnacle (Chelonibia testudinaria) from the North-Eastern Mediterranean Loggerhead Sea Turtles Epibiont Community
Authors: Beden Elif , Karahan Arzu
Published: January 2021

Barnacles are common epibionts on a wide range of marine organisms, including turtles. Chelonibia testudinaria is a successful epibiotic barnacle species, and mainly turtles are responsible for their wide range dispersal. In the present study, the mitochondrial Cytochrome Oxidase I (COI) gene haplotypes of C. testudinaria from Caretta caretta hosts were evaluated. The samples were collected from three dead C. caretta turtle carapaces in 2014 from the Middle East Technical University, Institute of Marine Sciences coastline. Results were also compared with those samples submitted to databases (NCBI and BOLD-system, 139 in total). By comparison, three clades were recorded like previous studies: the Atlantic-Mediterranean clade (Clade-α), the IndianPacific Ocean clade (Clade-β), and Magdalena Bay (Eastern Pacific- Clade-) clade; all samples collected from Turkish shores clustered in the Atlantic-Mediterranean group (Clade-α). The gene flow between the three clades was deficient and highly significant (0.02, 0.03, and 0.03, respectively). According to network age estimation, present study samples’ clade (Clade-α) diverged from the Clade-β approximately 200 kya (SDs=0.22, SDy=4402.90) and Clade- 130 kya (SDs=0.17, SDy=3494.55). In the present study, eight haplotypes were observed in total, two of which were specific to the region.
Case Report: Severe Craniofacial Coccidioidomycosis in a Pregnant Woman
Authors: Galaviz-Aboytes Carmina , Ochoa-Ramírez Luis Antonio , Alzate-Moctezuma José Alejandro , Ríos-Burgueño Efrén Rafael , Rodríguez-Millán José , Velarde-Félix Jesús Salvador
Published: January 2021

Coccidioidomycosis is a systemic fungal disease caused by Coccidioides immitis and Coccidioides posadasii. The lungs are the most common and often the initial site of involvement, and the non-pulmonary presentation is infrequent. We describe an unusual case of primary craniocutaneous coccidioidomycosis in a pregnant woman with infected bilateral periorbital nodules, intense pain at paranasal sinuses, and several osteolytic skull lesions. The analysis of 54 cases available in the literature makes us suggest that the area between the United States and Mexico is a risk zone for primary cutaneous coccidioidomycosis.
Dificultades para la negociación colectiva en el ámbito de la relación laboral especial del trabajo al servicio del hogar familiar
Authors: Benavente Torres Mª Inmaculada
Published: January 2021

El Convenio nº 189 OIT, aún pendiente de ratificación por España, ha supuesto un auténtico revulsivo social para la revisión de nuestra relación laboral especial del trabajo al servicio del hogar familiar. La regulación de los derechos colectivos y, muy en especial de la negociación colectiva, es una de las asignaturas pendientes de mayor transcendencia para el acercamiento de esta relación al modelo común de relaciones laborales y a la dignificación de estas trabajadoras. Este estudio pretende identificar los problemas principales que dificultan, o más bien impiden, la negociación colectiva en el sector. Y al hilo de ello, como posibles vías de solución de tales inconvenientes, se aportan las correspondientes sugerencias de reforma.
Rabdomiosarcoma embrionario del aparato genital femenino en paciente adolescente.
Authors: Campoverde Ávila Adriana , Ramírez Jorge
Published: January 2021

El rabdomiosarcoma (RMS) es un tumor maligno de partes blandas poco frecuente en la infancia y adolescencia, alrededor del 8% corresponde a este grupo etario, con una incidencia de 5 casos por cada millón de niños menores de 15 años.  De etiología desconocida en la actualidad, con probable componente genético, éste se origina en el mesénquima embrionario que da lugar al músculo esquelético estriado, con diseminación metastásica precoz por vía linfática y hematógena hacia cualquier parte del organismo. Paciente femenina de 15 años, sin antecedentes patológicos personales ni familiares, con menarquia a los 14 años de edad, sin inicio de vida sexual. Acudió al Hospital Carlos Andrade Marín, por servicio de urgencias obstétricas con cuadro clínico de dolor abdominal, acompañado de sangrado vaginal y presencia de masa vaginal. Candidata para intervención quirúrgica, donde se confirma diagnóstico por estudio histológico e imnuno-histoquímico, RMS embrionario. Con tratamiento adyuvante con Radioterapia y Quimioterapia, con pronóstico favorable. El RMS es un tipo de tumor maligno poco frecuente en la adolescencia en pacientes menores de 15 años, que hasta la actualidad no se ha podido determinar su origen causal, con un diagnóstico temprano y tratamiento multidisciplinar, el pronóstico de los pacientes ha experimentado una gran mejoría en las últimas décadas, tanto en Europa como en Estados Unidos. Globalmente, la supervivencia libre de enfermedad (SLE) se sitúa en el 60-70%. Sin embargo, los pacientes con enfermedad metastásica detectable al diagnóstico alcanzan una SLE inferior al 30%, con un pronóstico malo.
Neurofibromatosis tipo 1.
Authors: Tandazo Condolo Samantha Mishell
Published: January 2021

La Neurofibromatosis Tipo 1, anteriormente denominada Enfermedad de Von Recklinghausen, se produce por un trastorno genético en el cromosoma 17. La incidencia es de 1 por 3 000 recién nacidos y la prevalencia de 1 por 50 000 habitantes. Clínicamente se caracteriza por la presencia de manchas color café con leche, neurofibromas cutáneos, alteraciones óseas y neurológicas. Esta patología se incluye entre las facomatosis, por la presencia de pigmentaciones cutáneas.EI presente trabajo es un reporte de caso clínico de una paciente, que acude al servicio de Urgencias del Hospital Básico Arenillas, con un cuadro clínico que orienta hacia patología musculo esquelética; posterior a la observación y estudios paraclínicos de apoyo se establece como diagnóstico Neurofibromatosis tipo 1, trastorno neurocutáneo, de herencia autosómica dominante, caracterizada por presentar un patrón progresivo, puesto que las diferentes manifestaciones clínicas y complicaciones aparecen con el decursar de los años, aunque algunas pueden estar presentes desde el nacimiento.
Úlcera geográfica corneal por Herpes.
Authors: Vivar Esteban , Arcos Marisa , Matute Orellana César Andrés
Published: January 2021

Introducción: Una gran cantidad de infecciones tanto de la región genital como facial se dan a causa del virus herpes (HSV), las consecuencias visuales de esta patología pueden llegar a ser severas e irreversibles, afectando la calidad de vida de los pacientes.

Caso Clinico: Mujer de 72 años; Hipertensión Arterial (HTA) controlada, Consulta por ojo derecho (OD) rojo fue tratado por conjuntivitis (gatifloxacina más dexametasona) en otra casa de salud . Agudeza Visual (AV) Con corrección OD 6/10, Ojo Izquierdo 8/10 Biomicroscopia (BMC): úlcera geográfica gigante, la misma ocupaba más del 80% de la región nasal corneal de OD, sin afectación pupilar. Se interpreta como úlcera herpética, se retira medicación previa, se indica aciclovir tópico 5 veces al día y ketotifeno tópico 2 veces por día.

Evolución: Control en 48 hs: AV sin cambios. BMC: se observa evidente mejoría de lesión, con afectación solamente del cuadrante ínfero nasal corneal del OD. La paciente continuó evolucionando favorablemente.

Conclusiones: La rápida respuesta al tratamiento nos hace pensar que la acción del ketotifeno a nivel conjuntival disminuyendo la inflamación y secreción, permitió una mejor absorción del antiviral y una pronta mejoría del componente inflamatorio de la paciente.
The Sociolinguistics Study on the Use of Code Mixing In Gita Savitri Devi’s Youtube Channel Video
Authors: Astri Zul , Fian Al
Published: January 2021

Sociolinguistics is a linguistic branch that studies the relationship between language and society. In this entire world, every people have their personal language style when they have interacted with other people. With the language variation that people have, they are able to mix some languages on their single utterance. When one language is mixed with the other language, in the sociolinguistics study it is called code-mixing. By applying code-mixing in social life, it has been widely used by a lot of people over the world. One Indonesian YouTuber named Gita Savitri Devi does code-mixing in some of her videos. Therefore, this research focused on code-mixing appears in Gita Savitri Devis’s YouTube channel video. This research aimed to find out the types of code-mixing that emerge in Gita Savitri Devi’s YouTube video. This research used a descriptive qualitative method and the writers are the main instrument. This research applied the documentation method in collecting the data. This research focused on analyzing the types of code-mixing of Hoffman by applying content analysis. Furthermore, the result of the types was calculated by using Sudijono formula. In this study, the writers found that there were fifty-two data in types of code-mixing. The type of intra-sentential of code-mixing was the highest type and involving a change of pronunciation was the lowest one.
The Problems on English Writing 1 Course: Paragraph
Authors: Tanasy Novalia , Nashruddin Nashruddin
Published: January 2021

Writing is a skill that requires students to keep on practice. This research is held to answer research questions as follow: (1) What are the writing problems that common appear to the 1st semester students of English Education program of Universitas Muslim Maros in the academic year 2020-2021, and (2) What are the possible factors which cause those students’ problems in writing. This research was conducted in qualitative way. Since this research was conducted during pandemic of Corona Virus 19, Google Classroom application was also used as an instrument. The participants’ selection is based on non-probability sampling based on their availability, time flexibility, convenient and represent some characteristics to ease the writer’s investigation. The writer then analyzed the results of the observation and the interview descriptively. Results of this research showed that (1) most of the students were facing difficulties in Word Chosen, then (2) the main error the students mostly made especially on Grammatical related to connectors, pronoun references and correct verb, (3) whereas on Mechanical the students made mistakes on punctuation, spelling and capitalization. To another research question, this research revealed factors which contributed problems to the students in writing are lack of practice, time distribution and less motivated.

Keywords: Writing Skill, Writing Problems, Pandemic Corona Virus
The role of intelligence in the relationship between attachment styles and cognitive schemas in psychotherapists
Authors: Corduneanu Virginia
Published: January 2021

The present study aims to analyze the relationships between attachment styles (avoidant and anxious) and cognitive schemas and also the role of intelligence in this relationship. The participants of the study were 62 psychologists or future psychologists aged between 23 and 51 years, M = 34.38, SD = 7.18. Of these, 12 were psychology students, 54 were autonomous psychologists, and two were experimented psychologists. Four of the participants were men, and 68 were women. As for marital status, 23 were unmarried, 19 were in a relationship, and 30 were married. The instruments used were The Attachment Style Questionnaire, ASQ (α = .94), Young Cognitive Schema Questionnaire - Short Form, YSQ-S3 (α = .98), and Analogical Transfer Test (CAS++) for the measurement of intelligence. The results showed that avoidant and anxious attachment styles are positively associated with the development of maladaptive cognitive schemas in all the five domains. Intelligence does not moderate the relationship between attachment styles and cognitive schemas. In the personal development of psychologists and psychotherapists, it is necessary to augment maladaptive cognitive schemas through specific psychoeducational programs. Further studies are needed to identify other factors that may be involved in the development of cognitive schemas.
RELAȚIILE DINTRE TRĂSĂTURILE DE PERSONALITATE ȘI AȘTEPTĂRILE TINERILOR DE LA LOCUL DE MUNCĂ
Authors: Popa Florin
Published: January 2021

The main focus of this study was to identify the links between personality and job expectations for young adults. The first objective of this study was to identify the differences in young adults' job expectations in relation to their age and the congruence between their studies and the field in which they would like to work in. The second objective was to identify the relationship between young adults' personality, their job expectations and the way they perceive the possible congruence between their studies and the field in which they would like to work in. For this, a sample of young adults was used, all of them having finished college or were currently in college at the time the study was being carried out. The results were conclusive and have shown that there is a strong relationship between personality traits and job expectations and the expected studies-job congruence. Also, young adults under 21 have higher expectations about their studies and future job congruence, than those who are older than 21 years of age. And last but not least, young adults who have high expectations about their studies and future job being congruent also have higher job expectations.
RELAȚIA DINTRE FACTORII DE PERSONALITATE BIG FIVE ȘI DEPENDENȚA DE GAMING
Authors: Dumbravă Andrei Cosmin
Published: January 2021

As we can see the significant increase in the number of video games on the market, but also an increase in the number of people who choose to relax in a virtual world at the expense of reality. In this context, present study has the primary objective of discovering whether any of the Big Five personality components can predict gaming addiction. A total of 137 respondents aged between 10 and 55 participated in the data collection. As a result of the data analysis, the neuroticism factor explains 28% of the gaming addiction variable (R2 = .28, p <0.01) and the introversion factor variance explains 4% of the gaming addiction variable (R2 = .04, p <0.05). The rest of the personality factors did not correlate significantly with the gaming addiction variable. The types of video games did not moderate the relationship between emotional stability and gaming addiction.
Investigarea relației dintre plictiseală și comportamentele contraproductive la locul de muncă.Rolul stilurilor de umor
Authors: Sîrbu Alexandru-Andrei
Published: January 2021

The author tested the extent to which boredom at work leads to the manifestation of counter-productive work behaviors, with humor styles serving as a socially acceptable way of expressing such behaviors. The data was collected from a sample of 109 participants, through a questionnaire distributed online. The results did not provide support for the proposed model, humor styles did not mediate the relationship between boredom at work and counter-productive work behaviors.
The role of adverse childhood experiences, self control and Dark Triad in the development of criminal behaviour. Correlative and differential aspects
Authors: Merlușcă Bogdan-Ioan , Chiracu Alina
Published: January 2021

This research consists of two studies that aimed primarily on identifying the links between adverse childhood experiences, the level of self-control, the „dark” personality traits, and also their relationship with criminal behavior. In the first study we aimed to establish a relationship between all the variables. A sample of 232 psychology students participated in the research. They reported that they experienced a number of emotional adverse events in their childhood, and these events were positively associated with low levels of self-control and dark personality traits. The second study aimed to replicate the results obtained in the first study. Furthermore, we want to see the differences related to these variables between inmates and psychology students. In this study participated 87 inmates and 87 psychology students. The results showed that inmates predominantly experienced adverse childhood events of a physical nature, while students predominantly experienced adverse emotional events. It has been shown that psychopathy has been positively associated with offending behavior and the high frequency of adverse childhood events. The low level of self-control has been positively associated with adverse childhood events and negative personality traits. Further studies are needed in order to establish students' sensitivity thresholds in relation to adverse childhood events and to clarify the impact these events have had on students.
Playful work design: A diary study on its correlates in white collar workers
Authors: Petrescu Laura
Published: January 2021

The present study addresses playful work design as the consistent initiative of employees to integrate game-like elements into their day-to-day work in order to reach theirimposed work-related goals. We adapted a short measure for daily playful work design and followed 55 white-collar workers over 5 consecutive working days. We hypothesized that playful work design would be predicted by contextual factors and an individual factor (i.e. job autonomy, manager support for fun and growth need strength). Furthermore, we predicted that, across days, playful work design would relate positively with work engagement and positive affect and negatively with negative affect. Additionally, we tested for the moderation of growth need strength in the relationship between work engagement and playful work design. Results indicated that playful work design was not predicted by job either job autonomy, manager support for fun or growth need strength. We found that playful work design was related positively to work engagement and positive affect, but not related to negative affect. Moreover, growth need strength didn’t moderate the relationship between daily playful work design and daily work engagement. We discuss theoretical and practical implications of our findings for the work design literature.
Expanding the JD-R Model: is Vocational Fit a resource to consider?
Authors: Corbeanu Andreea
Published: January 2021

This study has two main goals. The first would be the extension of the Job Demands-Resources Model with another factor, namely with vocational fit. The other is to examine the relationship between vocational fit, work engagement and burnout, within the same framework. For this purpose, a total of 106 non-randomly selected participants have been invited to fill in a set of four questionnaires, written in Romanian. One out of the two hypotheses have been supported by the evidence. More specifically, the statement that vocational fit has incremental validity, over and above job demands and job resources, in predicting burnout and engagement has been confirmed. However, the assumption that vocational fit mediates the relationship between burnout and work engagement, has not.
جدلية البكاء والهجاء في شعر دعبل الخزاعي
Authors: Sahran Nora Ali Yslam , Alalqami Awadh Ahmed Hasan
Published: January 2021

ينتمي دعبل الخزاعي إلى قبيلة خزاعة اليمنية المعروفة بولائِها العريق للإسلام وللرسول (صلى الله عليه وسلم) ولآل البيت، فنشأ محبًّا لآل البيت، وأنشأ فيهم عددًا من القصائد أشهرها جميعًا التائية الكبرى، صور فيها ما أصاب آل البيت من مصائب وأحداث؛ بسبب أبناء عمومتهم من بني العباس، فجاء أغلب شعره في مدح آل البيت وفي الهجاء خصومًا.
Role of contrast enhanced computed tomography in assessing cervical lymph node metastases in oral cavity squamous cell carcinoma
Authors: Talha Ahmed Qureshi  , Muhammad Wasif  , Muhammad Sohail Awan  , Adnan yar Muhammad  , Ainulakbar Mughal  , Abdullah Ameen  , Admin
Published: January 2021

Abstract

Objectives: To evaluate the diagnostic accuracy of contrast enhanced CT scan to detect cervical nodal metastasis in oral cavity squamous cell carcinoma keeping final histopathology as gold standard.

Methods: Cross sectional study conducted from 1st January 2015 - 31st October 2016. All patients undergoing surgery who had their CT scans done at our centre were included in the study. Diagnostic accuracy of CT scans was calculated using final histopathology as gold standard. All CT scan were reviewed by consultant radiologist.

Results: Total 100 patients were reviewed, 70% were female, 55% had buccal and 32% had tongue cancer. 11 cases of T1, 20 cases of T2 , 4 cases of T3 and 21 cases of T4 stages were staged similarly by CT scan and histopathology, the kappa value of38.8%, p value <0.01. 6 cases of N1, 1 case of N2a , 9 cases of N2b, 3 cases of N2c, 1 case of N3 and 29 cases of N0 stages were staged similarly by CT scan and histopathology, with kappa value of 28.1%, p value of  <0.01. Sensitivity, specificity, positive predictive value, negative predictive value and overall diagnostic accuracy were 83%,61%,70.9%,76.3% and 73% respectively.

Conclusion: CT scan is useful for preoperative staging of oral cavity squamous cell carcinoma with an overall diagnostic accuracy of 73%, currently there are no superior diagnostic modalities. However, Due to low specificity and negative predictive value elective neck dissection should still be done in a negative CT scan for cervical lymph node metastases.

Keywords: Oral Cavity,
http://habibiaislamicus.com/index.php/hirj/article/view/159
Authors:   Assistant Professor, Federal Urdu University, Karachi., Khanum Masroor
Published: January 2021

Research on war and its subsequent division into five key generations has led to a better understanding of the social and academic world and how countries are at war today and how they are coping with potential threats. While the first three generations of warfare were based on traditional methods, a change was observed with the emergence of the fourth generation. It is characterized by the abandonment of standard tactics based on the number of soldiers, ammunition and physical contact on the battlefield. This form of warfare is conducted in a fragmented manner and is widespread in the enemy's society. The preferred method of combat is based on mobility, adaptability and maneuverability, rather than on people and weapons. It aims to attack an enemy nation in the most dangerous way, whether cultural, social, political or physical. The main difference between the three previous generations is that the fourth-generation war is not exclusively directed against soldiers. It focuses on ideas, culture, media, international organizations, market activities and even the minds of citizens. Ultimately, the aim is to exploit the enemy's weaknesses to convince its strategists that they simply cannot achieve their goals.
FPGA Based Embedded Multiprocessor Architecture
Authors: Jadhav Sumedh. S. , Bhoyar C.N.
Published: January 2021

Multiprocessor is a typical subject within the Computer architecture field of scope. A new methodology based on practical sessions with real devices and design is proposed. Embedded multiprocessor design presents challenges and opportunities that stem from task coarse granularity and the large number of inputs and outputs for each task. We have therefore designed a new architecture called embedded concurrent computing (ECC), which is implementing on FPGA chip using VHDL. The design methodology is expected to allow scalable embedded multiprocessors for system expansion. In recent decades, two forces have driven the increase of the processor performance: Advances in very large-scale integration (VLSI) technology and Micro architectural enhancements. Therefore, we aim to design the full architecture of an embedded processor for realistic to perform arithmetic, logical, shifting and branching operations. We will be synthesize and evaluated the embedded system based on Xilinx environment. Processor performance is going to be improving through clock speed increases and the clock speed increases and the exploitation of instruction- level parallelism. We will be designing embedded multiprocessor based on Xilinx environment or Modelsim environment.
PHASE CHANGE MATERIALS (PCM) FOR THERMAL CONTROL DURING SPACECRAFT TRANSPORTATION
Authors: S ARUN KUMAR. , SEKAR A. , JAIN D.N.SIDDHARTHA , GOVINDA K.V.
Published: January 2021

Phase Change materials (PCMs) absorb and release latent heat during their phase transition nearly at constant temperature. The latent heat storage phenomena using PCMs provides much higher storage density, with a smaller or zero temperature difference while storing and releasing of heat. PCMs have 5-14 times more heat capacity per unit volume than sensible storage materials that merits their usage as passive thermal control systems. They are effectively complemented with active thermal control systems in order to minimize their duty cycles and optimize the capacity. This paper discusses a passive thermal control system using PCMs to maintain the temperature within the limits inside the enclosures used for transportation of spacecrafts. Further, various applications of PCMs in the thermal control architecture as applied to spacecrafts are also discussed. The paper also discusses about the technologies such as Onboard power generation, Universal Spacecraft thermal control architecture and other significant spacecraft applications.
LIFE PREDICTION” FOR THE HEAT EXCHANGER
Authors: SINGH SIMARPREET
Published: January 2021

Heat exchanger degradation is a non- periodic non stationary process, which depends upon the variation of parameters w.r.t time. The measurements are associated with gross errors, if they are not properly handled, they may lead to erroneous estimation and prediction of heat exchanger performance. The objective of this paper is to predict the life of the heat exchanger while reaching to its threshold limit by the output factors like cleanliness factor and fouling factor. The performance factor of heat exchangers degrades with time due to scaling or fouling factor. In this paper we have monitored, predict the working life of the heat exchanger performance
CLASSIFICATION OF TEXTURES WITH AND WITHOUT ROTATION ANGLES: A DAUBECHIES WAVELET BASED APPROACH
Authors: M SHAIKHJI ZAID , JADHAV J B , KAPADIA V N
Published: January 2021

Textures play important roles in many image processing applications, since images of real objects often do not exhibit regions of uniform and smooth intensities, but variations of intensities with certain repeated structures or patterns, referred to as visual texture. The textural patterns or structures mainly result from the physical surface properties, such as roughness or oriented structured of a tactile quality. It is widely recognized that a visual texture, which can easily perceive, is very difficult to define. The difficulty results mainly from the fact that different people can define textures in applications dependent ways or with different perceptual motivations, and they are not generally agreed upon single definition of texture [1]. The development in multi-resolution analysis such as Gabor and wavelet transform help to overcome this difficulty. In this paper it describes that, texture classification using Wavelet Statistical Features (WSF), Wavelet Co-occurrence Features (WCF) and a combination of wavelet statistical features and co-occurrence features of wavelet transformed images with different feature databases can results better [2]. Several Image degrading parameters are introduced in the image to be classified for verifying the features. Wavelet based decomposing is used to classify the image with code prepared in MATLAB.
EFFECT OF NANOCLAY ON THE MECHANICAL BEHAVIOR OF COMPATIBILIZED ETHYLENE VINYL ACETATE COPOLYMER / HIGH DENSITY POLYETHYLENE BLENDS
Authors: Rajan Atul , Upadhyaya Pradeep , Kumar Vijai , Chand Navin
Published: January 2021

This paper presents a part of research on the mechanical properties of compatibilized Poly (ethylene-co-vinyl acetate) (EVA)/ high density polyethylene (HDPE)/ organo modified montmorillonite (OMMT) nanocomposites prepared by melt mixing technique. Use of maleic anhydride grafted polyethylene (MA-g-PE) as Compatibilizer improves compatibility of EVA and HDPE. Blends containing EVA/HDPE blend with 2 phr MA-g-PE shows optimum properties. It observes that the addition of nanoclay improves the mechanical properties like tensile strength, flexural modulus, abrasion resistance and hardness of compatibilized nanocomposites systems. The morphology is studied by Scanning Electron Microscopy (SEM). The optimized properties occurrs at clay loading levels of 4 phr with MA-g-PE system.
Rapid review on the use of oral fatty acid supplements in the prevention or as adjunct treatment of COVID-19
Authors: Flores-Genuino Rowena Natividad S. , Joson Marquis Von Angelo Syquio G. , Dofitas Belen L.
Published: January 2021

KEY FINDINGS

There is lack of clinical evidence supporting the role of oral fatty acid supplements as prevention and adjunctive

therapy for COVID-19.

Long-chain polyunsaturated fatty acids (PUFAs) mediate inflammation and adaptive immune responses. Omega-3

fatty acids promote anti‐inflammatory effects and reduce influenza virus replication.

No clinical evidence supporting the use of oral fatty acid supplements as prevention and adjunctive therapy of

COVID-19 was found.

We found indirect evidence from one systematic review on acute respiratory distress syndrome (ARDS) and two

longitudinal cohort studies on community-acquired pneumonia that showed non-significant and inconsistent

results.

The most common known side effects of omega-3-fatty acids are gastrointestinal in nature. They may also cause

allergy and affect blood clotting if taken with other medications that affect clotting.

There are 2 ongoing clinical trials on eicosapentaenoic fatty acids as an adjunctive therapy to standard oral

nutrition supplements or standard of care in COVID-19 patients.

WHO Interim guidelines, CDC interim guidelines, Infectious Diseases Society of America COVID-19 treatment

guidelines, and the American Thoracic Society did not give any recommendation on the use of nutritional

supplements in patients with COVID-19.