bluuebunny/crossref_metadata_2025 huggingface dataset:
Rapid tooling development for low volume injection molding of cosmetic compacts
Authors: VELLA A.
Published: April 2023

Abstract. This study aimed to explore the capability of different additive manufacturing (AM) or 3D printing technologies to rapidly manufacture mold inserts for injection molding as well as to evaluate the performance of the printed mold inserts and the quality of the injection molded parts. Fused filament fabrication (FFF), stereolithography (SLA), and multi-jet fusion (MJF) 3D printing technologies were used to produce the mold inserts, whereas a cosmetic compact base was selected as the case study part. The results obtained show that it is possible to use the mentioned technologies to manufacture tool inserts for rapid prototyping or low volume production of cosmetic compact bases using injection molding. When using the FFF mold inserts, the cosmetic compact bases produced were not of the best quality and surface finish but still acceptable for prototyping purposes only. The vertically printed SLA mold inserts as well as the MJF mold inserts produced cosmetic compact bases with no flashes and the best surface finish. The MJF mold inserts had excellent thermal properties so that apart from HDPE, a higher melting temperature ABS was also successfully molded. Also using the MJF mold inserts, the highest production number of 80 cosmetic compact bases of a good quality could be achieved.
Investigation on the pultrusion of thermoplastic preimpregnated polypropylene-glass tapes
Authors: TUCCI F.
Published: April 2023

Abstract. Pultrusion processes have been widely used and developed to produce composite profiles in fiber-reinforced thermoset. Recently industry and research community are investigating the adoption of thermoplastic polymers in the production of pultruded components exhibiting structural stability at higher temperatures and improved sustainability. Aiming to study the thermoplastic pultrusion process and how the process parameters settings affect the composite profiles produced, a laboratory-scale pultrusion line has been designed and produced. The pultrusion die is fed by polypropylene pre-impregnated tapes reinforced by unidirectional continuous glass fibers. It consists of a tapered converging cavity heated by electrical plates governed by PID controllers and a straight cooling die. This work aims to study the feasibility of the process, the consolidation of the tapes, and the interactions between the processed materials and the cavity walls by using embedded traveling thermocouples and load cells. The experimental test presented in this paper highlights that the preimpregnated tapes processed have been well-consolidated with the parameters adopted and the pultruded profile presents good quality at a visual inspection of the external surfaces and cross-section, indicating a good melting and hardening of the polypropylene matrix. The interactions between the processed materials and the die walls are evaluated by means of a cross-analysis of thermal and load data.
Investigation of the joining zone formation of impact extruded hybrid components by varied forming sequence and partial cooling
Authors: PIWEK A.
Published: April 2023

Abstract. Hybrid material concepts enable the combination of beneficial properties of different materials to extend the limited potential of monolithic components. When it comes to steel and aluminium, a wear-resistant and a lightweight metal are combined to produce a weight-reduced high-performance component with load-adapted areas. A method to create hybrid gear shafts is a novel approach called Tailored Forming. The process chain consists of joining e. g. by friction welding and subsequent impact extrusion under elevated temperature. Before forming, an axial temperature gradient is set in the serial arranged semi-finished products to adjust the different yield stresses of the dissimilar materials through induction heating of the steel part. The subsequent forming is intended to positively influence the joining zone thermo-mechanically and geometrically. However, prior work indicated a limitation of the influence on the joining zone in forward rod extrusion. Therefore, approaches are being researched that enable a stronger formation of the joining zone geometry to influence the resulting bond qualities through surface enlargement. A forward rod extrusion process of friction welded hybrid semi-finished products made of 20MnCr5 (AISI 5120H) combined with EN AW-6082 (AA6082) was carried out experimentally. Complementary to prior investigations, in which mainly the aluminium section was reduced through the die angle followed by the steel, the forming sequence of the materials was reversed to increase the joining zone surface with variation of the forming path. Additionally, a cooling of the aluminium side was realized through an immersion cooling to adjust maximum temperature gradients and further equalize the different yield stresses. Hardness tests, metallographic and SEM images of cross-sections were taken to evaluate the bond quality with regard to the temperature influence, joining zone formation, occurring defects and the resulting intermetallic compound (IMC). Impact extrusion with initially steel formed followed by aluminium resulted in a spherical formation of the joining zone and consequently in greater surface area, but also lead to partial defects in the IMC. The partial cooling of the aluminium allowed higher temperature gradients to be set, thus reducing defects through improved material flow in the joining zone.
A machine learning approach for adhesion forecasting of cold-sprayed coatings on polymer-based substrates
Authors: PERNA A.S.
Published: April 2023

Abstract. Cold spray is a novel production technology for creating metallic layers on various materials. Using a pressurized gas travelling at supersonic speeds, the metallic particles are accelerated and impact the target surface obtaining adhesion through mechanical interlocking between the powders and the substrate. This method is especially well suited for coating thermosensitive materials like composites since it only requires a little amount of heat, as the powders remain in a solid state. The quality and comprehension of this manufacturing process can be greatly improved by using machine learning techniques. In order to evaluate the characteristics of the particle's deformation upon collision, the goal of this work is to forecast it using machine learning approaches. The parameters chosen as an input for the model were related to 3 macro-categories: process parameters, powder parameters and substrate parameters. As regards the output parameters, flattening and penetration were chosen as they are the main characteristics of the coating on which homogeneity and adhesion depend. In order to obtain reliable results, a mix of data FEM and experimental data were used to train the neural network. The model was then tested on a dataset of experimental data.
Development of a new method utilizing semi-solid aluminum wires for extrusion based additive manufacturing
Authors: NEZIC N.
Published: April 2023

Abstract. In the field of additive manufacturing (AM) technologies, the development of metal-based extrusion processes constitutes a significant industrial trend in the recent years. Respective processes are differentiated into powder bed, powder-fed and wire-fed depending on the used feedstock. Among those, powder-fed AM represents the most widely used approach, despite its physical limitations leading to intense thermal gradients and an uncontrollable defective microstructure of produced parts. In this context, extrusion-based AM using a wire semi-finished product in the semi-solid state offers a novel alternative for the direct processing of metallic alloys, avoiding the limitations mentioned. For this reason, a new method for consecutive extrusion of semi-solid AlSiMg aluminum wires has been developed at the Institute for Metal Forming (IFU, Stuttgart, Germany), particularly investigating the influence of the material´s microstructure on the process result. By modifying microstructure via heat treatment, a specific modification of the rheological material behavior can be achieved in terms of a pronounced shear-thinning characteristic, thus systematically affecting extrusion and deposition. First, an experimental setup for continuously extruding semi-sold aluminum wires was realized. Subsequently, experimental investigations were carried out on the extrusion of aluminum wires prepared via the strain induced melt activated (SIMA) process as well as untreated aluminum wires, using a conductively heated printhead concept. The objective was to determine process parameters necessary for successful extrusion and deposition of the modified aluminum material as well as the final proof of concept regarding a specific transformation of the material´s microstructure during the extrusion process.
The influence of Particle Hardness on Wear in Sheet Metal Forming
Authors: ARINBJARNAR U.
Published: April 2023

Abstract. Particles exist in any tribo-system, whether it is closed to the environment or not. These particles originate from various sources, for example: contaminants such as dust or fibres from the environment; wear debris from abrasive/adhesive wear; and particles that are intentionally included in lubricant formulations. The particles affect the tribo-system in which they occur, but it is not always clear how. In this work, three types of chemically inert particles of similar size but different hardness are mixed with an otherwise pure oil and tested tribologically. Three tribological testing methods, pin-on-disc, four-ball, and bending-under-tension, are used to investigate the effect of the particles on friction and wear under sheet metal forming conditions. The hardness of the particles had a large effect on wear development, but little to no effect on the coefficient of friction found by pin-on-disc testing. Including particles of any hardness helped the oil in which they were included resist variation in load, leading to less wear for higher loads compared to the pure oil.
Production of Biosurfactant from Frangipani Flower Extract (Plumeria rubra) as an Eco-friendly Detergent in a Science Learning Project
Authors: Liana T. , Prima E. C. , Sinaga P. , Riandi R.
Published: April 2023

This study aims to provide experience to students through experimental activities in making liquid detergent to teach substance material and its changes according to the learning outcomes to be achieved. The research method used is a type of experimental research in the laboratory. Frangipani flower extract (Plumeria rubra) which is used as research material contains saponins that be used as natural surfactants in the manufacture of liquid detergents. Frangipani flower extraction was carried out by maceration using 96% ethanol solvent, the resulting extract was then subjected to a saponin identification test. In this study, it was prepared in 4 different formulations with a comparison of frangipani flower extract of 2 ml (F1), 4 ml (F2), 6 ml (F3), and 8 ml (F4). After that, it was evaluated physically and chemically including organoleptic tests, pH tests, foam stability, and detergency. The results of the saponin test on frangipani flower extract showed positive results, and the results of the chemical physics test were by SNI standards. The most optimum formulation is a liquid detergent with an extract concentration of 4 ml showed an organoleptic test according to SNI standards, a stability test of 85.00%, a pH of 10.30, and detergency showed good results.
Teoria cnoty w Hexaëmeron św. Bonawentury
Authors: Rymarczyk Stefan Michał
Published: April 2023

Bonawentura przedstawił syntetyczną koncepcję cnoty w protreptycznym dziele „Hexaëmeron”. Połączył w niej tradycję filozofii pogańskiej oraz tradycję wywodzącą się od myślicieli chrześcijańskich. Do połączenia obu tradycji posłużył się rozróżnieniem na poznanie wszczepione z natury i poznanie podniesione przez wiarę (konstruując to rozróżnienie, odpowiadał przede wszystkim na palący problem odnowienia syntezy teologicznej św. Augustyna). Na poziomie poznania wszczepionego z natury, dokonał połączenia koncepcji cnoty wywodzącej się od Platona, stoików i Plotyna, z nowo odkrytym w XIII wieku dorobkiem Arystotelesa. Natomiast na poziomie poznania podniesionego przez wiarę, zebrał w jedną całość cały dorobek chrześcijańskiego nauczania o cnocie. Następnie, utworzenie płynnego przejścia z jednego poziomu poznania na drugi, pozwoliło Doktorowi Serafickiemu na przedstawienie solidnej koncepcji cnoty, obejmującej wszystkie dotychczasowe dokonania w tej dziedzinie.
Thermodynamics and Structural Optimization of Organic Rankine Cycle Plant for Clean Energy Access Using Artificial Bee Colony and Multi-Criteria Decision-Making Algorithms
Authors: Udo Aniebiet , Diemuodeke Ogheneruona , Ojapah Mohammed , Abam Fidelis , Ofodu Joseph C.
Published: April 2023

The quest to decarbonize the energy space to avert the negative climate change consequences calls for using low/zero-carbon energy conversion technologies in the energy generation space. The Organic Rankine Cycle is a low/zero-carbon energy conversion technology for recovering waste heat from low to medium-temperature heat sources and for biomass conversion. Therefore, this paper presents the thermodynamic optimization, with an artificial bee colony algorithm, of different ORC configurations, including simple organic Rankine cycle, Regenerative Organic Rankine Cycle, Cascade Organic Rankine Cycle, Organic Rankine Cycle with Superheat, Organic Rankine Cycle with Superheat and Reheat, Regenerative-Superheat Organic Rankine Cycle, Regenerative-Reheat Organic Rankine Cycle and Two Complementary ORC using twelve (12) different working fluids. The thermodynamic optimization was followed by structural optimization using a multi-criteria decision approach. The modified-TOPSIS multi-criteria decision-making analysis was used to perform the structural optimization. The overall optimization study shows that the Regenerative-Reheat Organic Rankine Cycle, operating with an isopentane of 0 GWP and ODP, was selected as the best ORC configuration. The Regenerative-Reheat Organic Rankine Cycle has the following performance; thermal efficiency of 49.5%, maximum power output of 0.4 MW, condenser pressure of 90 kPa, and turbine pressure of 3.37 MPa. The results presented in this work will support clean energy developers in the clean energy access sector, especially in the agrarian community with huge agro-waste generation potentials.
Teacher Outcomes with a School-Based Mindfulness Intervention during COVID-19
Authors: Jarrett Traci , Haliwa Ilana , Ludrosky Jennifer , Mason Ashley , Prather Gretchen , Barlett Brittney , Snodgrass Amy , Dino Geri
Published: April 2023

Teacher burnout is one of the primary drivers of turnover. Skills such as improved classroom management have been shown to mitigate teacher burnout. COVID-19 created classroom disruption and an unprecedented youth mental health crisis. This study examined the effectiveness of a school-based mindfulness training at improving classroom management self-efficacy and reducing teacher burnout during COVID-19. Elementary school personnel were invited to participate in two versions of Kidding Around Yoga training and to implement with their students. Pre- and post-tests were conducted at 4-6 months (n = 49) to measure individual items related to classroom management, teacher self-efficacy, perceptions of student engagement, and professional quality of life. There were significant differences at post for items related to teacher skills, knowledge, and self-efficacy, and perceptions of the student experience (specifically, student emotional regulation). There were no significant differences between baseline and post in any of the professional quality of life measures. Findings suggest that Kidding Around Yoga is promising as a universal intervention to improve teachers’ self-efficacy and skills, and their experience of the classroom. More information is needed to understand if the intervention would have long-term impact on teacher burnout and turnover.
Usability, Acceptability, and Preliminary Effectiveness of a Peer-Delivered and Technology-Supported Mental Health Intervention for Family Caregivers of People With Dementia: Field Usability Study
Authors: Collins-Pisano Caroline , Leggett Amanda N , Gambee David , Fortuna Karen L
Published: April 2023

Background

Family caregivers of people with dementia are critical to the quality of life of care recipients and the sustainability of health care systems but face an increased risk of emotional distress and negative physical and mental health outcomes.

Objective

The purpose of this study was to examine the usability, acceptability, and preliminary effectiveness of a technology-based and caregiver-delivered peer support program, the Caregiver Remote Education and Support (CARES) smartphone or tablet app.

Methods

A total of 9 adult family caregivers of people with dementia received the CARES intervention, and 3 former family caregivers of people with dementia were trained to deliver it. Quantitative data were collected at baseline and at the end of the 2-week field usability study. Qualitative data were also collected at the end of the 2-week field usability study.

Results

The field usability study demonstrated that a 2-week peer-delivered and technology-supported mental health intervention designed to improve burden, stress, and strain levels was experienced by former and current family caregivers of people with dementia as acceptable. Current family caregivers rated CARES as above average in usability, whereas the caregiver peer supporters rated CARES as marginally usable. CARES was associated with non–statistically significant improvements in burden, stress, and strain levels.

Conclusions

This field usability study demonstrated that it is possible to train former family caregivers of people with dementia to use technology to deliver a mental health intervention to current family caregivers of people with dementia. Future studies would benefit from a longer trial; a larger sample size; a randomized controlled design; and a control of covariables such as stages of dementia, years providing care, and severity of dementia symptoms.
Study of Classroom Discourse of English-Major Interns from the Perspective of Functional Linguistics
Authors: Cao Wen
Published: April 2023

Based on the qualitative analysis of classroom discourse of English-major interns, this study investigates the characteristics and causes of classroom discourse of English-major interns in underdeveloped areas in western China from the perspective of functional linguistics, and endeavors to explore the reasons for these characteristics from social context. The results show that the classroom discourse of English-major interns has the following three characteristics: 1) code-switching is common; 2) the types of clauses are mainly imperative sentences, declarative sentences with rising intonation; 3) teachers talk a lot and dominate the conversational turn. Code-switching reflects the shortage of target language input and outdated teaching methods in English class; and the second characteristic just echoes with existing research; teacher’s dominance over conversational turn indicates interns’ imitation of their instructors’ teaching mode, hoping to construct their teacher identity. This paper puts forward relevant suggestions to the above-mentioned problems, including adopting a research-guided teaching in elementary education, reinforcing the supervision of college internship instructors, diversifying the way interns constructing their teacher identities.
Politics, Antisemitism, Anti-Blackness, Kanye West (aka Ye), and the Rise of the New “Uncle Toms” in America
Authors: Bracey, Ph.D., DPA Earnest N.
Published: April 2023

This paper shatters the notion or myth that Kanye West (aka Ye) is some kind of cunning, musical genius, or a political mastermind, as he has waded into the trouble waters of American politics. Indeed, nothing can be further from the truth, as the rapper is the most obvious example of the “Uncle Tom” phenomenon. This is to say that Ye’s racial transgressions will never be overlocked, as he is tarred forever because of his association with white supremacists. West’s (or Ye’s) hatred of Black people in the United States is quite evident in his public antisemitism and anti-black speeches, and “know-it-all,” disgusting antics. Moreover, West’s outlandish rhetoric is not particularly easy to ignore, especially on certain social media platforms. It goes without saying that West (aka Ye) has a misguided, and weak constitution, particularly since he has involved himself with very bad and disreputable people. Finally, his disdain for the daily struggles of Black people, Jews and other people of color is a testament to his lack of compassion and empathy. Hence, this paper will explore the political issues of antisemitism and anti-blackness in relation to Ye.
ОБОРУДОВАНИЕ И МАТЕРИАЛЫ ДЛЯ ИЗГОТОВЛЕНИЯ МЕТАЛЛИЧЕСКИХ КОМПЛЕКТУЮЩИХ В АО «ЗПП»
Authors: Полянин А. , Шугаепов Ш. , Ермолаев Е. , Егошин В.
Published: April 2023

Рассмотрены оборудование и материалы, применяемые в АО «Завод полупроводниковых приборов» (АО «ЗПП») для изготовления различных металлических комплектующих для металлокерамических корпусов.
ОСОБЕННОСТИ ЭЛЕКТРОННО-­ЛУЧЕВОЙ МИКРОРАЗМЕРНОЙ ОБРАБОТКИ ПОДЛОЖЕК ИЗ РАЗЛИЧНЫХ ТИПОВ КЕРАМИКИ
Authors: Чжо Я. , Масловский В. , Моисеев К. , Воробьев И. , Назаренко М.
Published: April 2023

Рассмотрены возможности метода электронно-­лучевой обработки керамики. Приведены результаты экспериментальных исследований по обработке спеченной керамики ВК94-ДН и LTCC KEKO SK 47.
СОВЕРШЕНСТВОВАНИЕ ЗАКОНОДАТЕЛЬСТВА О КОНТРАКТНОЙ СИСТЕМЕ И ЗАКУПОЧНЫХ ПРОЦЕДУРАХ
Authors: Ковалевский Ю.
Published: April 2023

ЗАСЕДАНИЕ СЕКЦИИ ПО ВОЕННО-­ПРОМЫШЛЕННОЙ ПОЛИТИКЕ И БЮДЖЕТУ ЭКСПЕРТНОГО СОВЕТА ПРИ КОМИТЕТЕ СОВЕТА ФЕДЕРАЦИИ ПО ОБОРОНЕ И БЕЗОПАСНОСТИ
ВСПОМИНАЯ БУДУЩЕЕ: АВТОМАТИЗАЦИЯ СКЛАДА КОМПЛЕКТУЮЩИХ
Authors: Рожков И. , Гаранин А. , Подольский Д.
Published: April 2023

В статье на примере сотрудничества ООО «Новые Технологии» с китайской компанией Neotel Technology обсуждаются ключевые принципы построения системы складского учета на производственном предприятии, современные технологии, оборудование и решения для комплексной автоматизации склада.
ОБОРУДОВАНИЕ, ПРОВЕРЕННОЕ ВРЕМЕНЕМ: КАК ПРАВИЛЬНО ХРАНИТЬ МАТЕРИАЛЫ И КОМПОНЕНТЫ
Authors: Чуйкова Л.
Published: April 2023

В статье описаны требования международных и российских стандартов к хранению материалов и компонентов. Рассмотрены особенности и преимущества шкафов сухого хранения производства ООО «Совтест АТЕ».
La vida en los tiempos del coronavirus
Authors: Roa Garduño Ariadna Guadalupe , Maya Téllez Martha , Campos González Itzel Guadalupe , Hernández Carrillo Arlet Michelle , Gabriel Gómez Lourdes , Bedolla Garduño Ethel , Cruz Gámez Georgina Elizabeth , Ortega de la Rosa Evangelina , Rodríguez Arredondo Angélica , Pastor Pallares Ma. Isabel , Velasquez García Roberto René , Montes Vázquez Ana Celia , Morales Romero Roxana Irasema , Hernández Cruz Sandy , Ramos Domínguez Karina
Published: April 2023

La obra presenta 16 capítulos que son el resultado de un certamen convocado por el Bachillerato a Distancia para que estudiantes, asesores y tutores de dicho programa compartieran sus vivencias durante la pandemia por COVID-19. Cada relato nos permite apreciar las fortalezas y desafíos que este grupo de representantes de B@UNAM vivió en contextos tanto urbanos como rurales, desde edades, contexto y experiencias de vida diversos. La obra constituye una documentación de la resiliencia, creatividad y perseverancia de esta muestra de la familia B@UNAM.
Pretreatments for Microbial Analysis and Evaluation of Hygiene of Wet Towels and Wet Wipes
Authors: Kang Joohyun , Sung Miseon , Kim Jung Hoan , Yoon Yohan
Published: April 2023

The demand for hygiene products has increased worldwide since the outbreak of global COVID-19. As the hygiene products market is expanding, it is necessary to manage microbial contamination in wet towels and wet wipes. This study evaluated pretreatment methods for microbial recovery from wet towels and wipes and microbial contamination levels in wet towels and wipes with the pretreatment method. Escherichia coli (NCCP14038 and NCCP14039), Staphylococcus aureus (ATCC25923 and ATCC29213), and Pseudomonas aeruginosa (NCCP10250 and NCCP11229) were inoculated on five fabric materials of wet towels and wet wipes. The recovery rates of the bacteria from wet towels and wet wipes using three pretreatment methods (pummeling, hand shaking, and portion cutting method) were investigated. Using the selected pretreatment method, the contamination levels of E. coli, S. aureus, and P. aeruginosa were evaluated for 238 wet towels and 244 wet wipes, which were collected in April to August, 2019. The presence of toxA and antibiotic resistance of P. aeruginosa isolated from wet towels were evaluated. The overall recovery rates of the pummeling method and hand shaking method were higher than the portion cutting method. Considering the convenience, the pummeling method was used to investigate the microbial contamination in the wet towels and wet wipes. P. aeruginosa was detected in two wet towels at an average of 9.9×102 CFU/towel. E. coli and S. aureus were not detected in both wet towels and wipes. P. aeruginosa isolates showed no resistances to piperacillin, piperacillin-tazobactam, aztreonam, and gentamicin, but had toxA. The results indicate that the pummeling method is the most appropriate pretreatment method for the recovery of microorganisms, and microbial analysis showed that this method could be useful in monitoring microbial contamination in wet towels and wet wipes.
Recent Advances in using Lipomyces starkeyi for the Production of Single-Cell Oil
Authors: Jacob Anu , Mathew Jissin
Published: April 2023

The clean energy demand and limited fossil fuel reserves require an alternate source that is sustainable and eco-friendly. This demand for clean energy steered the introduction of biofuels such as bioethanol and biodiesel. The third-generation biodiesel is promising as it surpasses the difficulties associated with food security and land usage. The third-generation biodiesel comprises biodiesel derived from oil produced by oleaginous microbes. The term oleaginous refers to microbes with the ability to accumulate lipids to about 20% of the biomass and is found in the form of triacylglycerols. Yeasts can be grown easily on a commercial scale and are amenable to modifications to increase single-cell oil (SCO) productivity. The oleaginous yeast L. starkeyi is a potential lipid producer that can accumulate up to 70% of SCO of its cell dry weight under optimum conditions. Compared to other oleaginous organisms, it can be grown on a wide range of feedstock and a good part of the lipid produced can be converted to biodiesel. This review presents the recent advances in single-cell oil production from L starkeyi and strategies to increase lipid production are analyzed.
Speech Based Emotion Recognition Using Machine Learning
Authors: Rajababu Makineedi , Abhinav P. , Subhash N. K , Chowdary M. Ajay
Published: April 2023

Abstract: Speech-based emotion recognition is a developing field that has attracted a lot of interest lately. We suggest a machine learning method for identifying emotions from speech samples in this article. From the speech examples, we extract acoustic features that we then use to train and test a variety of machine learning methods, such as decision trees, support vector machines, and neural networks. Using a dataset of speech samples with emotional labels that is publicly accessible, we assess how well these models perform. The experimental findings demonstrate that, with an accuracy of 87%, the neural network model beats the other models. Applications for the suggested method include human-computer interaction, education, and the diagnosis of mental illnesses. Overall, this article makes a contribution to the improvement of speech-based emotion recognition systems.
Investigation of Mechanical Properties of Natural Fiber Reinforced With Screw Pine and Jute Composite
Authors: Kumar R. Jagadresh , Rao P. Kameswara , Roopa S. , Rao M. Gangadhar
Published: April 2023

Abstract: Natural fiber reinforced composites gaining the demand in the engineering applications. Natural Fiber Reinforced Polymer Composites replaces the conventional material because it possesses mechanical, chemical, thermal properties comparable and higher than conventional material. Light weight, low cost and biodegradability increases the demand of NFRPC. The objective of this work is to prepare the composite fiber composite specimens as per ASTM Standard using hand layup method and conduct the tensile Test, impact Test (Charpy) and hardness Test (Rockwell). The testes carried out on Glass Fiber + Jute Fiber Composite, Glass Fiber + Jute Fiber + Screw Pine Fiber and Glass Fiber + Screw Pine Fiber composite. The comparative result is observed to know the optimized composite fiber
A Review on Real Time Object Detection Using Deep Learning
Authors: Padmane Priyanka , Dasare Tushar , Deshkar Prathmesh , Dasgupta Nikhil , Kale Ashish , Hamdard Burhanuddin
Published: April 2023

Abstract: In object detection system we implement various convolutional networks to acquire a precise recognition and localization of objects in digital images and videos. This system sees real time applications in security, diagnosis, surveillance, automation, sports and many others. YOLO is one of the available models of deep learning which is used for quick implementation of object detection system. We will have a brief study of deep learning for object detection in this paper
The Impact of Different Shear Wall Structure Position on Symmetric and Unsymmetric Tall Buildings
Authors: More Mahesh Rameshrao , Bhumare Ajinkyaraj Shivaji , Nagargoje Sadhu Bajirao
Published: April 2023

Abstract: The shear wall is a structural component used to withstand lateral stresses. These walls will absorb shear stresses and avoid construction site relocation and subsequently devastation. For instance, if the shear walls are not constructed, we cannot expect the structure to exhibit acceptable tensional behavior. The contribution of the remaining structural elements to the bending moment, shear force, torsion, and axial force, as well as the final design of all structural components, are also impacted by shear wall. Over the last two decades, there has been an almost exponential increase in the building of towering skyscrapers above 150 meters in height. Numerous identical buildings have been constructed across the Middle East and Asia, and many more are now being planned or constructed. Buildings taller than 300 meters provide significant engineering challenges, particularly in terms of structural and geotechnical design. Wind analysis is crucial for tall constructions. Numerous studies have explored the structural behavior of tall buildings with SSI by considering a range of criteria, including foundation type, soil conditions, lateral loads. The current study presents G+18-story rectangular building and a asymmetric building with a 3 m floor-to-floor height was evaluated in ETABS in zone III. The structure's resistance to static and dynamic wind and seismic forces has been studied using shear walls in various locations, such as without shear walls, shear walls in the outer center, and shear walls at the corners. The results obtained are compared in the form of storey drift, joint displacement and storey drift. The research indicates that the shear wall at outer Centre with firm soil has the best response compared to without shear wall and shear wall at corner condition for symmetrical building. And for asymmetrical building shear wall at corner condition has best response compared to without shear wall and shear wall at outer centre condition.
Desarrollo y cambios hacia nuevas formas de libertad
Authors: Méndez Briones Luis
Published: April 2023

En Chile y en el mundo estamos viviendo profundos cambios, en parte por la pandemia, la crisis económica asociada, el surgimiento de las tecnologías 4,0 y en el caso nacional por el despertar social cuya manifestación más crítica fue el llamado “estallido social” de octubre de 2019.
Avances en la economía del ecosistema digital en algunos países de latinoamérica
Authors: García Mogollón Ana Milena , Malagón Sáenz Elizabeth
Published: April 2023

Las actuales condiciones del mercado exigen que las compañías adopten nuevos modelos de negocios bajo los factores que aumentan la productividad como la innovación tecnológica, adopción del e-commerce, entre otras herramientas del marketing digital, enfocadas hacia la competitividad de pymes que incluya una gestión digital de las relaciones con el cliente.

El presente estudio se realizó con el propósito de realizar una revisión en temáticas y tendencias del ecosistema digital en la región latinoamericana, y su impacto en la aplicación de estrategias de innovación en los nuevos modelos de negocios, ecosistema de digital que le permita a la Pymes en el mediano y largo plazo la toma de decisiones en cuanto a comercio electrónico, desarrollo de habilidades para la transformación digital. La metodología utilizada se basó en una investigación descriptiva con método de la Norma UNE 166006:2006. Se analizaron aspectos del desarrollo de las TIC. Se evidenció que el grado de adopción del comercio electrónico difiere entre los países de la región, políticas públicas en la economía digital.
Análisis exploratorio espacial de las transferencias en México
Authors: Carrillo Viramontes José Antonio , Saldaña Hernández Miriam
Published: April 2023

El objetivo de este trabajo es analizar si existe o no un patrón espacial en las transferencias intergubernamentales en México. Para alcanzar el objetivo, se utilizan herramientas de análisis espacial como el índice de Moran global, el indicador local de asociación espacial (LISA) y el indicador local Geary. Para capturar la interacción estratégica entre los estados se utilizan diferentes matrices de contigüidad. Los principales resultados son una autocorrelación espacial positiva en las transferencias que reciben las entidades federativas en México. Esto sugiere que las trasferencias intergubernamentales asignadas han creado clústeres de estados con nivel alto de transferencias rodeados de estados con el mismo nivel de transferencias. Asimismo, de acuerdo con el indicador local de asociación espacial (LISA) solo 9 estados en México son significativos para el análisis local.
Análisis del acercamiento teórico al concepto de cl´´uster
Authors: Vargas Hernández Jorge G. , Vargas González Omar Cristian
Published: April 2023

El objetivo principal de esta investigación es brindar un panorama general referente del concepto del clúster, a través de la revisión de estudios teórico-empíricos y algunos modelos propuestos, así como su importancia como estrategia para el desarrollo regional y su funcionamiento. La metodología utilizada se basa en una revisión analítica de enfoques teóricos relevantes en fuentes secundarias de referencias. Se concluye que los supuestos de una definición conceptual de clúster es que es un grupo de empresas que realizan las mismas actividades o actividades estrechamente relacionadas hacia atrás, hacia adelante y hacia los lados. El clúster como economía de innovación puede ser una estrategia de desarrollo regional natural formada por la oferta y la demanda y creada artificialmente a través de políticas públicas para incentivar el desarrollo de una región.
Myth and measurement
Authors: Méndez Briones Luis Fernando
Published: April 2023

A propósito del reciente Premio Nobel de Economía 2021 otorgado a David Card, Joshua Angrist y Guido Imbens, nos parece interesante comentar el aporte de Card al desarrollo de la economía laboral. Esta vez de la mano de una obra que en su momento generó un interesante debate y que hasta hoy continúa aportando elementos de análisis, nos referimos a MITH AND MEASUREMENT: The New Economics of the Minimum Wage (MITO y MEDIDA: La nueva economía del salario mínimo).
Empresas unicornio en México, modelos de negocio innovadores: Caso de estudio Kavak
Authors: Bernal Barbosa Laura Beatriz
Published: April 2023

Las empresas unicornio son modelos de negocio que se caracterizan por contar con capitales superiores a los mil millones de dólares. El objetivo de este trabajo es realizar un análisis exploratorio desde diferentes perspectivas teóricas organizacionales, así como estimar los elementos del entorno y principales tendencias mundiales que han in-cidido directamente en el desarrollo, crecimiento y permanencia en el mercado de la em-presa Kavak uno de los principales unicornios de América Latina. Para su realización se llevó a cabo la metodología del estudio de casos. Se observó que la utilización del co-mercio electrónico y la tecnología a la par de un modelo innovador son factores diferen-ciadores que le han generado ventajas competitivas sostenibles.
Mediciones de eficiencias en sistemas silvo pastoriles
Authors: De Luca Anabella , De Luca José María
Published: April 2023

Este trabajo intenta comprobar la conclusión obtenida por los investigadores (Wadud, A., & White, B. ,2000) a través de una metodología diferente que se apoya en la elaboración de modelos de frontera estocástica y compararlos con los obtenidos en modelos de Análisis de Envolvente de Datos.

Para ello, los autores han realizado una investigación en el sector silvo pastoril del nordeste argentino elaborando modelos determinísticos y estocásticos y se ha asumido que la frontera de producción es acertadamente representada por la función matemática denominada translog.

Se ha demostrado que tanto los modelos de retorno de escala variable como los correspondientes a los modelos de retorno de escala constante exhiben mayor variabili-dad que las medidas de las fronteras estocásticas.
El costeo por actividades en empresas de servicios. Aplicación en empresa de logística en la Provincia de Santa Fe, Argentina
Authors: Robson-Vicens Cynthia M. , Noguera López María Yohana , Bertolino Gisela
Published: April 2023

El costeo por actividades (ABC) puede ser utilizado tanto en empresas industriales como en empresas se servicios. En el presente trabajo se aplica al servicio de logística y distribución de una empresa Pyme comercial, en el que se compara con el costo del servicio que la empresa determina de manera tradicional.

Brinda un aporte significativo a la generación de información relevante para la gestión y la toma de decisiones económicas, así como para evitar la subvaloración del costo de prestación del servicio en el caso estudiado, una menor rentabilidad a la deseada y, también, evita distribuir recursos que la empresa no ha generado de forma genuina.
Considerations for running and interpreting a binary logistic regression analysis – a research note
Authors: Beacom Emma
Published: April 2023

This research note discusses key considerations for analysis of categorical data using a Pearson’s chi-square and binary logistic regression. It draws on experience from analysis of a country-level household survey (Northern Ireland Health Survey 2014/15), using SPSSv25, that examined the relationship between household food insecurity status and identified demographic predictors, using Pearson’s Chi-Square test to check associations and binary logistic regressions to derive the predictive models. This note presents an overview of the assumptions for both tests which must be satisfied to ensure the tests are appropriate, discusses the usefulness of using Pearson’s Chi-Square test as a preliminary test before using binary logistic regression, and presents an overview of how to interpret the output from a binary logistic regression model.
Comparative Study of Image Processing Algorithms to Detect Defects in Cast Components
Authors: Muralidhar Nikith
Published: April 2023

In the manufacturing industry, the non-destructive evaluation (NDE) of components is crucial. These cast components are susceptible to blowholes and other anomalies. If such flaws are included in the components, the fatigue life will be harmed, which would almost certainly result in catastrophic accidents. Humans currently evaluate cast components by various methods. We propose an automatic approach for detecting faults in casts with the goal of producing a category that will eliminate the need for manual testing. The technique looks for defects in cast components, In the previous years, Image processing technology has advanced significantly. The method proposed utilizes Convolutional Neural Networks (CNN) and Support Vector Classifiers (SVC’s). This process classifies if the component has a defect or not. According to the hypothesis, human examiners may benefit from the approach because it reduces their workload.
The effects of brand equity on millennials’ purchase decision for sports nutrition products in Ireland
Authors: Louvet Denise
Published: April 2023

Based on the theory of planned behaviour, this study investigates whether brand equity influences the purchase intention for sports nutrition products among millennials in Ireland and what factors influence their purchase decision. This research reports the results of a survey of 102 millennials. The results suggest that brand equity influences millennials' purchase intention and that it is also influenced by subjective norms and perceived behavioural control. Furthermore, the analysis shows a correlation between brand equity and its subdimensions (brand awareness/associations, perceived quality, brand loyalty) and purchase intention. This study contributes to the brand management literature in the sports nutrition industry and provided brand managers with various suggestions on how to build brand equity in their business practices.
Qualitative Analysis on the Client's Experience of the Propeller Model Approach to Counselling Therapy
Authors: Stevenson Kevin
Published: April 2023

The successful development of psychotherapeutic and counselling approaches can reflect the evolution and innovation within the industry of psychological treatment. Measuring the benefits of an approach involves inquiry into how it is conducted, the practitioner conducting it, and even the setting in which it is conducted. The aims of this exploratory study are to discover if a psychotherapeutic approach, the Propeller Model Approach, serves its purpose of increasing self-awareness for clients. Such awareness is distinguished in the study as intrinsic and instrumental and aims to build on the theoretical framework that self-awareness is beneficial to the human condition. In order to conduct the study, a semi-structured interview was conducted with five clients engaged in counselling therapy after an individual online counselling session. Each session utilized the Approach implemented by the practitioner for the study who was also the principal researcher. To understand the nature of the participant experience of the Approach, a phenomenological interpretivist epistemology was adhered to. The use of abduction assisted in connecting the ontological construction of participant feedback from their interaction with the Approach to new potential hypotheses. The data of the feedback was analysed through a reflexive thematic analysis that respected the hermeneutical nature of the coding and thematization of the data. The study serves as an example of evidence-based research into a new psychotherapeutic approach and can guide practitioners interested in utilizing the Propeller Model Approach to counselling therapy or for general exploration into human identity.
UM ESTÁGIO NO MUSEU COM PRIMO LEVI: CIÊNCIA, LITERATURA E DIREITOS HUMANOS NA FORMAÇÃO DE PROFESSORES DE QUÍMICA
Authors: Palmieri Luciane Jatobá , Massi Luciana , Da Silva Rafaela Valero , Leonardo Júnior Carlos Sérgio
Published: April 2023

O relato de experiência descrito está inserido na discussão e defesa da necessidade de ampliação dos espaços formativos envolvidos no estágio curricular supervisionado. Os museus de ciências apresentam potencialidade de difundir conhecimentos não fragmentados e são peças importantes para uma divulgação científica com compromisso social. Tivemos como objetivo oferecer a futuros professores uma atuação crítica e reflexiva sobre as possibilidades de ações educativas para o ensino de Química em museus de ciências e construir uma exposição com base na vida e na obra do químico e escritor Primo Levi. O trabalho foi realizado no contexto da disciplina de Estágio Curricular Supervisionado para o curso de licenciatura em Química, com abordagem em três eixos: i) teórico: estudos sobre a interface entre a educação, educação museal e educação em ciências; ii) observacional: visita a quatro museus de ciências; e, iii) prático: planejamento, montagem e execução da exposição a partir da seleção de conteúdos e transposição museográfica da obra híbrida e humanística de Levi. Como principais resultados da experiência formativa, destacamos: a construção de uma proposta de museu e de sua função social; a valorização dos espaços museais; a importância da preparação docente para atuar e trabalhar com esses espaços; os desafios do processo de construção de uma exposição; o reconhecimento da relação existente entre ciência e literatura.
POLÍTICAS EDUCACIONAIS NO ENSINO DE CIÊNCIAS: UMA ANÁLISE DOCUMENTAL
Authors: Prado Carolina Conceição , Pinheiro Mércia Cristine Magalhães , Mol Gerson de Souza
Published: April 2023

Políticas Educacionais são caracterizadas por ações desenvolvidas pelo Estado para garantir e colocar em prática o acesso à educação para todos os cidadãos, bem como oferecer um ensino de qualidade. Neste trabalho, buscamos compreender como a temática Políticas Educacionais, na sua interface com o Ensino de Ciências, tem sido tratada por pesquisadores, a partir de um mapeamento dos trabalhos publicados nos Anais do XII Encontro Nacional de Pesquisa em Educação em Ciências – ENPEC. Para isso, realizamos uma pesquisa qualitativa descritiva documental. Os resultados mostraram que a temática ‘Políticas Educacionais’, nos últimos 10 anos, não possui muita representatividade nos anais das edições do ENPEC. Entre os 24 artigos analisados, constatamos que predominam as pesquisas desenvolvidas no eixo Sul-Sudeste, representando 92% dessas produções. Em relação ao direcionamento das pesquisas, 42% delas abordam aspectos relacionados à pós-graduação, 29% à Educação Básica, 17% o Ensino Superior e 12% abordaram políticas em Ciências. A tendência das pesquisas educacionais relacionadas à Educação Básica foi direcionada, principalmente, para a nova Base Nacional Curricular Comum e seus impactos na educação brasileira. Em relação às políticas educacionais em Ciências, um denominador comum foi a inconsistência do Ensino Básico científico no Brasil, influenciado pela globalização socioeconômica e as ideias neoliberais. No Ensino Superior, a base foi a melhoria de ensino nos cursos de Licenciatura, para uma educação de qualidade, visando a formação de professores capazes de proporcionar uma alfabetização cientifica consistente a seus alunos. Quanto à pós-graduação, o principal foco foi a vinculação da qualidade da formação de profissionais de alto nível a projetos e programas de apoio que visam prover recursos financeiros para estimular a realização de pesquisa. Portanto, consideramos que este trabalho nos permitiu delinear um recorte do panorama recente da produção acadêmica sobre Política Educacional relacionadas à área de Educação em Ciências.