bluuebunny/crossref_metadata_2025 huggingface dataset:
The mechanism of thermal ionization of methenamine on the surface intermetallic compound NaAux
Authors: Knatko M.V.  , Lapushkin M.N.
Published: September 2022

Thermal ionization of methenamine (C6H12N4) on the surface of the NaAux intermetallic compound has been studied. It has been established that the processes of decomposition, desorption and ionization of adsorbed compounds, thermally stimulated on the surface, proceed due to the accumulation of energy at the degrees of freedom of the adsorption complex, including the adsorbed compound and a solid, by the mechanism of monomolecular decomposition reactions. In this case, the decomposition of the adsorption complex is accompanied by the desorption of ions that are not in thermal equilibrium with the solid. The uniformity of the temperature dependences of the ion current and their distribution over two groups allowed us to conclude that ions are desorbed from the surface, which correspond to the decays of individual adsorbed molecules, as well as the decays of dimers formed on the surface. The decay of methenamine molecules during thermal ionization occurs in the same way as their decay in vacuum during electron ionization, which indicates the preservation of the bulk structure of methenamine molecules during adsorption and a significant lifetime of the excited state of compounds on NaAux. Keywords: thermal ionization, methenamine, intermetallic compound, NaAux.
Asymptotic stage of self-catalyzed growth of III-V nanowires by molecular beam epitaxy
Authors: Dubrovskii V. G.  , Rylkova M. V.  , Sokolovskii A. S.  , Sokolova Zn. V.
Published: September 2022

A new analytic theory is developed for asymptotic stage of self-catalyzed growth of III-V nanowires (NWs) by molecular beam epitaxy (MBE), where NWs collect all group III atoms deposited from vapor. The shadowing NW length is derived which corresponds for the full shadowing of the substrate surface in MBE. The NW length and radius are derived depending on the effective deposition thickness and MBE growth parameters. It is shown that the NW length increases, and their length decreases with decreasing the array pitch and increasing the V/III flux ratio. Keywords: II-V nanowires, shadowing effect, length, radius, surface density, modeling
Kinetics of spontaneous formation of core shell structure in (In,Ga)As nanowires
Authors: Sibirev N V  , Berdnikov Y  , Shtrom I. V.  , Ubyivovk E. V.  , Reznik R. R.  , Cirlin G. E.
Published: September 2022

A model of spontaneous formation of the core-shell structure in (In,Ga)As nanowire grown via molecular beam epitaxy without independent radial growth is proposed. Within the framework of the proposed model, the distribution of In across the axis of the nanowire was fitted. Keywords: core-shell nanowire, ternary nanowire, InGaAs nanowire, radial nanowire heterostructure.
Hybrid metal polymer as a potential active medium of an optoacoustic generator
Authors: Girshova E.I.  , Mikitchuk A.P.  , Belonovski A.V.  , Morozov K.M.
Published: September 2022

A hybrid material was studied, consisting of polydimethylsiloxane and silver nanoparticles distributed throughout its volume, its optical and thermodynamic characteristics were calculated for different volume fractions of silver content. It is theoretically shown that this material with a volume fraction of silver of about 30% can be used as an active medium for an optoacoustic transducer with an operating frequency range of about 10 MHz. Keywords: ultrasonic generator, polydimethylsiloxane, hybrid material
Terahertz generation in InAs epitaxial films
Authors: Trukhin V. N.  , Solov'ev V.  A.  , Mustafin I. A.  , Chernov M. Yu.
Published: September 2022

We present the results of terahertz generation studies under excitation via femtosecond lasers pulses epitaxial films of InAs, which were synthesized on semi-insulating and highly doped GaAs substrates. It is shown that a terahertz emitter based on epitaxial InAs film grown on a heavily doped GaAs n-type substrate, has the same terahertz generation efficiency as the InAs-film emitter grown on a semi-isolating GaAs substrate, but it has a significantly better spectral resolution, which is mainly determined by the parameters of the optical delay line and the femtosecond laser's stability. Keywords: coherent terahertz emitter, InAs epitaxial film, molecular beam epitaxy
Research of dielectric properties of oil dispersed systems depending on the ratio of asphalt-resinous substances
Authors: Zinnatullin R. R.  , Kovaleva L.A.
Published: September 2022

The degree of influence of the electromagnetic field on oil dispersed systems depends on the dielectric properties of these systems, in particular oil. Dielectric properties of oil depend on the content of high molecular weight polar components: asphaltenes and resins. In this regard, a study was carried out of the dielectric properties of oil in the radio-frequency range, depending on the content of asphalt-resinous substances in it. The obtained results of experimental studies show the correlation of dielectric parameters with the ratio of the content of resins and asphaltenes in oil. Keywords: petroleum dispersed systems, asphalt-resinous substances, dielectric properties, dielectric loss tangent, resonance frequency
Map of water-oil flow regimes in a direct microchannel
Authors: Pryazhnikov M.I.  , Minakov A.V.  , Pryazhikov A.I.  , Yakimov A.S.
Published: September 2022

The flow regimes of water and crude oil in a Y-type microchannel were studied in a wide range of flow rates. Four different types of water-oil flow regimes have been identified: plug, droplet, parallel and chaotic. The ranges of existence of these flow regimes have been determined. Dependences of the length of water plugs and droplets in oil on various parameters have been established. Maps of the corresponding water-oil flow regimes have been constructed. Keywords: Y-microchannel, liquid-liquid flow, immiscible liquids, flow regime map
Problems of flow separation detection by pressure sensors on a unmanned aerial vehicles with a propeller
Authors: Polivanov P. A.  , Sidorenko A.A.
Published: September 2022

An experimental study of pulsations characteristics of the zone of flow separation arising at a small airplane-type UAV with a pushing two-blade propeller were carried out. The measurements were done in wind tunnel by unsteady pressure sensors and microphones built into the skin of the UAV for the test cases with and without a rotating propeller. A significant effect of the propeller on the level of pulsations was found. An increase of the incoming flow velocity led to a weakening of this effect. Analysis of the spectral data of the disturbances did not reveal a direct relationship between the propeller noise and the unsteady characteristics of the separation zone. Keywords: UAV, flow separation, unsteady pressure sensor, propeller
Laminar chaos in coupled time-delay systems
Authors: Kulminskiy D. D.  , Ponomarenko V. I.  , Prokhorov M. D.
Published: September 2022

The possibility of the existence of laminar chaos in coupled time-delayed feedback systems is investigated. The cases of unidirectional and mutual coupling of time-delay systems are considered. It is shown for the first time that laminar chaos can exist not only in a system with a variable delay time, but also in a system with a constant delay time, if it is coupled with a system in the regime of laminar chaos. Keywords: Time-delay systems, Laminar chaos, Coupled oscillators, Synchronization
Peculiarities of nucleation and growth of InGaN nanowires on SiC/Si substrates by HVPE
Authors: Kukushkin S. A.  , Osipov A. V.  , Redkov A. V.  , Stozharov V. M.  , Ubiyvovk E. V.  , Sharofidinov Sh. Sh.
Published: September 2022

The growth of InGaN layers on hybrid SiC/Si substrates with orientations (100), (110), and (111) by the HVPE method was studied at temperatures that wittingly exceed the temperature of InN decomposition onto nitrogen atoms and metallic In (1000oC). On substrates with orientations (110) and (111), the formation of InGaN whisker nanocrystals was observed. The shape and growth mechanisms of nanocrystals were investigated. It is shown that nanocrystals nucleate on the (111) surface only inside V-defects formed at the points where screw dislocations exit onto the surface. On the (110) surface, nanocrystals are formed only on pedestals that arise during the film growth. An explanation is given for the difference in the growth mechanisms of nanocrystals on substrates of different orientations. Keywords: InGaN, heterostructures, SiC on Si, silicon, whisker nanocrystals, nanostructures, atomic substitution method
Study of Ga_2O-=SUB=-3-=/SUB=- deposition by MOVPE from trimethylgallium and oxygen in a wide temperature range
Authors: Lundin W.V.  , Rodin S.N.  , Sakharov A.V.  , Tsatsulnikov A.F.  , Lobanova A.V.  , Bogdanov M.V.  , Talalaev R.A.  , Haiding Sun  , Shibing Long
Published: September 2022

Study of Ga2O3 deposition by MOVPE using trimethylgallium and oxygen was performed in a wide temperature range. It was found that for Ga2O3 deposition rate vs temperature dependence is very close to the TMGa pyrolysis in nitrogen. Kinetically-limited range for these processes corresponds to 550-700oC, that is 150oC higher, then for GaN deposition in the same reactor. Keywords: gallium oxide, MOVPE
Influence of preliminary ion bombardment on the formation of Co and CoSi-=SUB=-2-=/SUB=- nanofilms on Si surface during solid-phase deposition
Authors: Turapov I. Kh.  , Bekpulatov I. R.  , Tashatov A. Q.  , Umirzakov B.E.
Published: September 2022

In this work, to obtain ordered nanophases of Co and CoSi2, nuclei are preliminarily created on the Si surface by bombardment with Ar+ ions with E0=0.5 keV and D=8· 1013 cm-2. It was found that a narrow band gap (Eg~ 0.3 eV) appears in the band structure at the Co layer thickness of less than 3 ML. The metallic properties of the Co film manifest themselves at a thickness of more than 4-5 ML. Heating the Co/Si(111) system at T=900 K leads to the formation of nanophases and CoSi2 nanofilms. The Eg value is 0.8 eV for the CoSi2 nanophases with theta~ 3 ML and 0.6 eV for the CoSi2 film. Keywords: nanophase, epitaxy, low-energy bombardment, surface, single crystal, island growth, ion dose, degree of coverage.
Analytical solution of the problem of synthesis of three-link stepped Chebyshev's microwave filter
Authors: Aref'ev A. S.
Published: September 2022

The problem of synthesis of the three-link stepped Chebyshev's microwave filter is reduced to two independent fourth-degree equations, including a single link wave impedance as unknown. The solution of Descartes -Euler is applied to these equations. It is proved that, in case wave impedances of extreme links are equal, the problem of the filter synthesis has two solutions. Identical phase-frequency responses correspond to these solutions. It is proved that for each link a product of the wave impedances relating to these solutions is equal to a square of the wave impedance of the transmission line including the filter. Keywords: Microwave filter, stepped microwave filter, Chebyshev's microwave filter, synthesis of microwave filter.
The obtaining of regular metal and dielectric microstructures based on irradiation-modified polymer films
Authors: Asadchikov V. E.  , Bedin S. A.  , Berezkin V. V.  , Vasiliev A. B.  , Grigoriev Yu. V.  , Dyachkova I. G.  , Konovko A. A.  , Nazmov V. P.  , Minaev N. V.  , Epifanov E. O.
Published: September 2022

Based on regular porous polymeric membranes, the synthesis of metal and dielectric spearhead structures with given morphological characteristics was carried out. Copper structures with the ~ 1 μm height and dielectric spearhead microstructures made from iodic acid with the 12 μm height and 1 μm diameter were obtained. The possibility is discussed of using such optical elements to solve the problems of increasing the efficiency of IR radiation detection, signal amplification and conversion to visible and near-infrared ranges. Keywords: regular membranes, spearhead structures, copper, iodic acid, radiation transformations.
Quality of Mobile Apps for Child Development Support: Search in App Stores and Content Analysis
Authors: DeWitt Akeiylah , Kientz Julie , Liljenquist Kendra
Published: September 2022

Background

Following increases in smartphone access, more parents seek parenting advice through internet sources, including blogs, web-based forums, or mobile apps. However, identifying quality apps (ones that respond to the diverse experiences of families) for guidance on child development can be challenging.

Objective

This review of mobile health apps aimed to document the landscape, design, and content of apps in the United States available to parents as they promote their child’s developmental health.

Methods

To understand the availability and quality of apps for early childhood health promotion, we completed a content analysis of apps in 2 major app stores (Google Play and Apple App stores).

Results

We found that most apps do not provide tailored experiences to parents, including cultural considerations, and instead promote generic guidance that may be useful to parents in some contexts. We discuss the need for an evaluative framework to assess apps aimed to support parents on child development topics.

Conclusions

Future work is needed on how to support designers in this area, specifically related to avoiding potential burdens on users and providing culturally informed and equity-driven experiences.
The influence of land use on the spectrum of landform transformations (a case study of the Russian Arctic)
Authors: Kazhukalo G. , Eremenko E.
Published: September 2022

Human activity has a profound effect on relief. Therefore, it is crucial to study the anthropogenic relief transformation. The field of study is relatively young, although rapidly developing. This work outlines the influence of human activity on the relief. A vital point of the work was to identify the differences in the influence on morphogenesis by varying types of land use. Norilsk mining district was chosen as a~study area because of its intensive and complex human activities, vast mineral resources, and a large population, which implies an extensive anthropogenic transformation of the area. As a result of the research, land use types with the most profound influence on relief have been identified. Moreover, both the direct and indirect effects on morphogenesis, as well as the resulting processes, have been outlined.
The inclusion and evolution of isms and dades in higher education Institutions
Authors: Júnior A. Pereira , Ferreira A. O. , Gatinho R. G. B. S. , Pontes A. N. , Beltrão N. E. S. , Morales G. P.
Published: September 2022

The objective of this research was to analyze the evolutionary form, at an international and national level, of ageism, feminism, racism, sexism, diversity, equity, sexuality, and transsexuality on the campuses of higher education institutions. The data obtained and analyzed indicated that, in the international context, ageism is constantly adapting and studying (n = 7.0; 30.0% when compared to the national context (n = 5.0;20.0%); As for studies on racism, there is an inversion in terms of quantity: international (n = 6.0; 30.0%), national (n = 11.0; 44.0%). Equity has been studied more in the international context (n = 7.0;63.5%). Studies on sexuality are less effective at the international level (n = 1.0; 9.2%) when compared to the national level (n = 4.0; 80.0%). Therefore, mitigating the discriminatory processes, already included in the daily life of universities, for these two suffixes, involves changing human behavior, the acceptability of differences between living beings, and the elaboration of institutional policies that are not guided by federal legislation. or state, but the search for a more effective, lasting, and evolutionary inclusive objective. 0% when compared to the national context (n = 5.0;20.0%); As for studies on racism, there is an inversion in terms of quantity: international (n = 6.0; 30.0%), national (n = 11.0; 44.0%). Equity has been studied more in the international context (n = 7.0;63.5%). Studies on sexuality are less effective at the international level (n = 1.0; 9.2%) when compared to the national level (n = 4.0; 80.0%).
The training of health students during the COVID-19 pandemic: Changing scenarios
Authors: da Silva Adriana Duarte de Souza Carvalho , Carvalho Enderson Rodrigues de , Pauletti Master Leandro Henrique Tavares
Published: September 2022

The COVID-19 pandemic has radically changed our relationships with the world, making our social interactions more distant and colder than we saw before the spread of the disease. The impact of this seclusion of people and the departure from their routines should have positive and negative consequences over the years. In this reflection, we discussed what adaptations were made so that students and educational institutions could count on a horizon in the maintenance of their activities during the pandemic, without students, teachers and even the schedules, being impacted by the scenario that happened. The article shows that there were many investments so that the interaction was not compromised and so that the technological resources could compose all the support that was already available for the training of students in health courses.
Effectiveness of Backward Design Lesson Planning in Teaching and Learning Physics: A Case Study
Authors: Gombu Phuntsho , Utha Karma , Seden Kinley
Published: September 2022

Lesson planning through backward design was introduced in the schools in one of the Dzongkhags in eastern Bhutan to enhance students' learning since 2017. This study was undertaken to find out the effectiveness of backward design lesson planning in teaching and learning physics. A qualitative case study approach implementing semi-structured interviews, classroom observation, and document analysis was used. A purposive sampling method was used to select eight physics teachers from four schools. The study found that lesson planning using backward design significantly influences students' understanding of the concept and promotes purposeful classroom engagement through realistic classroom learning. As the assessment is planned separately in this design, it provided teachers with an improved understanding of students' learning, the achievement of learning standards and, subsequently, scaffolding them to achieve greater learning performance. The other benefits include improved academic achievement and increased confidence of teachers. Some challenges were limited evidence of transferring students' learning to their everyday lives; more time requirements in the planning phase; teachers' limited knowledge in setting instructional goals; and developing reliable assessment tools and essential questions. This study recommends conducting similar studies in other subject areas involving more participants to offer richer perspectives on the effectiveness of the backward design.
Travel Literature: A perspective on the history of Indian travel accounts and recent developments in the genre
Authors: Kharyal Priya
Published: September 2022

Travel writing is a literary genre that remain concerned with travelling accounts or records of a person. Such accounts enable one to know about different cities and countries and become familiar with varied cultures, behavioral patterns and their living conditions. Travel writings are being produced since time immemorial. India is a land of diverse cultures, languages, and food habits that remained a favourite destination among travel enthusiasts living both India and abroad. Many European, Chinese and Arab Travel writers like Jean Baptiste Tavernier, Ibn-e-Battuta and Hiuen Tsang have written at length about their experiences of travelling to India. They all have written works on India, its culture and the people that are living there. Their accounts are not reliable from the information point of view because they are based on whatever these travellers have seen or witnessed around them. They do not provide an actual image of India but rather presented an unrealistic portrayal of India in their writings. They have not focused on the adversities and social evils that were prevalent at that time. Earlier, travel writings remain a product of colonial enterprise. That is why there is a need for India travel writers to discuss their opinions regarding the impression of India and the people at large. Through this paper, I will try to show the history of Indian travel writings and works that are being done under this genre until now. At the same time, I will also discuss about the recent changes that are happening in this genre.
Newly ‘constructed masculinity’ in Mahesh Dattani’s Dance Like a Man
Authors: Deka Diganta
Published: September 2022

The term ‘gender’ is used to describe the distinction between the socialized features of femininity and masculinity as well as the biological sex. It is a social construct that defines behaviors like masculine and feminine behavior. Gender plays a hugely important part in society. Specifically, a situation in which men frequently oppress women and where women are assigned responsibilities that make it clear that they are less capable of acquiring and using arbitrary authority than men are. The term ‘patriarchy’ often refers to the system in which this power appears and is exercised. Additionally, men tend to appreciate the power factor and insist on participating in activities that are primarily focused on them. So, a man’s identity defines his sexuality and area of work. Men also want to participate in activities that are largely about them and tend to appreciate the power component. A man’s identity thus determines his sexual orientation and line of work. In his play Dance Like A Man, Mahesh Dattani takes on these issues head-on as a dramatist. He challenges the socialization of gender roles and the hierarchy of the sexes. The present paper attempts to explore the discourse masculinity, patriarchal hegemony and gender construction within the margin of family unit characterized by generation gaps as depicted in the play.
Exchange Rate of Fishermen Business Fishing in Kalinaun Village, East Likupang District, North Minahasa Regency
Authors: Dien Christian Ronald , Bataragoa Negotiable Elvis , Manoppo Victoria EN
Published: September 2022

Kalinaun Village is one of the villages located in East Likupang District, North Minahasa Regency, North Sulawesi, Indonesia. Fisherman. The analysis used in this research is a descriptive quantitative analysis and descriptive qualitative. The economic situation in the form of fishing rods owned by fishermen in Kalinaun village is their own. The initial capital of Rp. 10,000,000 – Rp. 15,000,000 with a percentage of 80 %. the largest investment cost spent on the purchase of a rainbow boat was Rp. 7,500,000, - with a percentage of 70.09% of the total investment cost and the smallest cost for the purchase of a catinting machine was Rp. 3,200,000, - with a percentage of 29.91%. Fishermen go to sea also vary between 1 – 6 times a week, but on average 4 times a week go to sea. Their income as fishermen is only Rp. 48,000,000 in a year. The profit rate in a year is Rp. 41.930.000, - is the profit earned and can be used for saving or making/procuring new fishing units. The caught fish are marketed to the Girian Village or some consumers come to the fish landing site/beside the beach.
Experiments on Turbocharger Compressor Acoustics
Authors: Singh Dr. Bishnujee
Published: September 2022

Abstract: Аs envirоnmentаl regulаtiоns get tоugher аnd turbосhаrging requirements beсоme higher, the асоustiс emissiоn оf dоwnsized engines hаs beсоme а соnсern. Turbосhаrgers аre nоw required tо орerаte аt lоwer mаss flоw rаtes аnd higher bооst рressures, fоrсing them tо wоrk. In this thesis, I exрlоre аnd аnаlyze the асоustiс turbосhаrger соmрressоrs аnd рrороse methоds tо сhаrасterize them. I аlsо соnduсted exрeriments оn vаriоus industriаl turbосhаrgers tо see hоw different flоw рrорerties аffeсt the sоund they mаke. The literаture review fосuses оn the exрerimentаl teсhniques used tо understаnd the flоw сhаrасteristiсs оf а соmрressоr. Different methоdоlоgies аre рrороsed аnd imрlemented; exрerimentаl meаsurements аre tаken in аn аneсhоiс сhаmber аnd соmраred with numeriсаl simulаtiоns. We desсribe the nоise рrоduсed by а соmрressоr, inсluding meаsurements оf its sрeсtrаl соntent. The nоise sрeсtrum соntаined lоw-frequenсy sоunds whiсh were linked with deeр surges, higher frequenсy brоаdbаnd nоises frоm tiр сleаrаnсe interасtiоn, аnd whооshing nоises оf раrtiсulаr соnсern fоr the аutоmоtive industry. These meаsurements were mаde оver the whоle sрeed rаnge оf the соmрressоr. Finаlly, mоre exрerimentаl аnd numeriсаl reseаrсh аre reсоmmended tо gо deeрer intо these diffiсulties аnd better understаnd hоw intаke designs might delаy аnd minimize the emergenсe оf hаrmful асоustiс events.
Study and Analysis of Different Absorber Geometry of Compound Parabolic Solar Collector and its Effect on Thermal Efficiency for Heating Water for Sanitary Use
Authors: Kumar Nishant , Singh Dharamveer
Published: September 2022

Abstract: This project is focused on carrying out a study of the absorber geometry of the parabolic solar collector compound for heating water for sanitary use, to evaluate the temperature gradient between the inlet and outlet of the water of this concentraDDDtor collector, and the efficiency achieved according to the absorber configuration to later compare it with collectors with a conventional flat absorber surface. The parabola of the reflector of the composite parabolic solar collector was obtained considering the circular absorber, with a concentration ratio of 4 plus 10% of this, to consider a truncation of the reflector, the circular absorber was configured with a small absorber plate of aluminum which has a thermal conductivity of 401 W /mK The values obtained experimentally in the collector were based on the data collected in the field files. It was considered to experience the heating of water on different days with the climatic conditions, cloudy, partially cloudy and sunny, with a totally clear sky. The water heating tests were carried out with two types of geometric configuration of the absorber of the composite parabolic solar collector; circular absorber and configured circular absorber, with which a water outlet temperature of 61 ° C and 76 ° C and a thermal efficiency of 60% respectively were obtained, these results were presented taking into account a climatic condition (sunny day) approximately the same for the two absorber configurations, and with average values of wind speed, ambient temperature and solar radiation.
The Data Mining Based Model for Detection of Fraudulent Behavior in Water Consumption
Authors: Veena Ch. , Shweshitha I. , Nitheesha N. , Raulo Harsha Priya
Published: September 2022

Abstract: There are many significant problems facing by water supplying companies and agencies because of fraudulent water consumption. Which is resulting a higher loss of income to water supplying agencies. Finding efficient measurements for detecting fraudulent activities has beenan active research area in recent years. To detect this fraudulent behaviour faced by water companies’ intelligent datamining techniques can be used to reduce the loss. This research explores the use of two classification techniques SVM and KNN to detect suspicious fraud water customers. The SVM based approach uses customer load profile attributes to expose abnormal behaviour that is known to be correlated with non-technical loss activities. The data has been collected from the historical data of the company billing system. The accuracy of the generated model obtained 74% which is better than the current manual prediction procedures.The system will help the company to predict suspicious water customers.
Desenvolvimento Moral no Ambiente Escolar
Authors: Rodrigues Marina Lara , Bataglia Patrícia Unger Raphael
Published: September 2022

Esta pesquisa apresenta uma revisão de literatura referente ao desenvolvimento moral de crianças e adolescentes no ambiente escolar. Foram exploradas as produções científicas brasileiras entre 2010 e 2020, com base nos conceitos de respeito unilateral e mútuo; relações de coação e cooperação; autonomia e heteronomia; e ambiente sociomoral cooperativo. A busca de referências nas bases SciELO e Periódicos CAPES utilizando os termos desenvolvimento moral, autoritarismo e ambiente escolar apontou 308 pesquisas e o número final de 16 referências empregadas na revisão crítica. A análise gerou: i) caracterização quantitativa da produção; ii) categorização qualitativa das referências; iii) identificação das áreas incipientes e potenciais de pesquisa, sugerindo que a presença do autoritarismo no ambiente escolar afeta significativamente o desenvolvimento moral dos/as alunos/as, bem como o comportamento de professores/as e gestores/as. Também foi observado o desejo de maior participação por parte dos/as alunos/as na construção de normas e regras, indicando uma demanda pela transição da heteronomia para a autonomia moral nos ambientes escolares.
reforma do ensino médio no Ceará
Authors: Vidal Eloisa Maia , Oliveira Ana Gardennya Linard Sirio , Avelar Davi Miranda Lucena de
Published: September 2022

O artigo reflete sobre a oferta de ensino médio público no Ceará, posteriormente à publicação da Lei de Diretrizes e Bases da Educação – LDB, mostrando como se desenharam a atual política estadual de ensino médio e a implantação da reforma pela Lei nº 13.415/2017. A pesquisa, com abordagem qualitativa e quantitativa, é um estudo de caso de natureza descritiva e explicativa, envolvendo legislação educacional, documentos técnicos oficiais obtidos na Secretaria de Educação do Estado do Ceará e referências bibliográficas sobre o tema. Os dados foram tratados por meio de estatísticas descritivas. Considerando a complexidade da rede estadual de ensino do Ceará e a implementação das políticas para o ensino médio nos últimos 15 anos, assim como o aumento da taxa de aprovação e a redução da taxa de distorção idade-série, é importante chamar a atenção para a inflexão que essa reforma pode provocar no sistema como um todo, uma vez que constatou-se que ela reduz a carga horária da formação básica comum e geral para todos/as os/as estudantes e afeta o corpo docente com alterações relevantes nas suas atividades profissionais.
Novo Ensino Médio em Pernambuco
Authors: Lima Maria da Conceição Silva , Lucas Gomes Danyella Jakelyne
Published: September 2022

O texto examina a implementação do Novo Ensino Médio na rede estadual de Pernambuco. Tendo por base a pesquisa qualitativa, investigou-se o currículo oficial da Secretaria de Educação e como a proposta foi recepcionada e implementada nas escolas por técnicos/as, gestores/as e docentes das diferentes mesorregiões do estado. Os dados mostraram sentimentos de insegurança, incerteza e expectativas quanto à efetivação da reforma, associados à escolha de trilhas e itinerários formativos, considerando inúmeras complicações apresentadas nos distintos contextos do chão da escola, apontando para futuras disparidades na formação dessa etapa e na não garantia de equidade aos/às estudantes.
Profissionalização e a reforma do ensino médio
Authors: Batista Sueli Soares dos Santos , Pereira Daniel Capella , De Moura Abreu Claudia Barcelos , Pessoa Monique Rufino da Silva
Published: September 2022

Os movimentos normativos do Estado brasileiro a partir de 2017 buscam consolidar políticas educacionais pela lógica neoliberal, que ganhou espaço nos anos 1990. O presente estudo põe em questão muitos pontos dessas políticas: formação integral versus educação para o trabalho, qualidade versus quantidade, público versus privado e centralização versus descentralização. Tem-se como enfoque da pesquisa a experiência no estado de São Paulo, que avança rapidamente na implantação do M-tec e do Novotec, programas que representam um redirecionamento da educação profissional, com parcerias interinstitucionais desde 2010. Foram analisados programas implantados pelo estado a partir de dispositivos institucionais do Centro Estadual de Educação Tecnológica Paula Souza – CEETEPS, em parceria com a Secretaria Estadual da Educação. Discute-se a necessidade de avaliar tais programas em tela quanto a sua efetividade para escolarização e profissionalização.
Reforma do ensino médio no Mato Grosso do Sul
Authors: Perboni Fabio , Lopes Maria de Lourdes de Macedo Ferreira
Published: September 2022

O presente artigo vincula-se à pesquisa interinstitucional A Reforma do Ensino Médio com a Lei nº 13.415/2017: percursos da implementação nas redes estadual e federal de Ensino Médio do Mato Grosso do Sul, que integra investigação da Rede EMpesquisa, centrando-se nas iniciativas de implementação da reforma do ensino médio em Mato Grosso do Sul. Com abordagem qualitativa, utiliza análise documental e entrevistas com responsáveis por essa implementação. O corpus documental compõe-se de leis, normas, orientações nacionais e do sistema estadual de educação. A pesquisa indica uma celeridade na elaboração e na publicação das normas, dissonando das alterações lentas nas escolas-piloto, em parte pela situação pandêmica, mas também pela complexidade das mudanças que demandam rearranjo da organização curricular. Esse processo deixou as escolas em espera, alijadas do processo de regulamentação elaborado pela Secretaria de Estado de Educação – SED/MS e fundações privadas para a abrupta ‘conversão total’ ao Novo Ensino Médio em 2022.
Parcerias público-privadas
Authors: Queiroz Lavínia Maria Silva , Azevedo Alessandro Augusto de
Published: September 2022

O presente texto trata de processos de resistência e ressignificação na prática docente ante o projeto Escola da Escolha, de Ensino Médio em Tempo Integral – EMTI, em uma escola da rede pública estadual de Mossoró, no Rio Grande do Norte. Tal projeto resultou de uma parceria público-privada com o Instituto de Corresponsabilidade pela Educação – ICE. Foram realizadas entrevistas com profissionais da escola e analisados os Cadernos de Formação produzidos pelo ICE, contendo fundamentos, objetivos e metodologia de sua proposta. Como aporte teórico, considera-se principalmente Stephen Ball (2005; 2009), para quem “pôr em prática” uma política não é algo linear, mas perpassado por feixes de interpretação, atuação e tradução. Constatou-se aqui os docentes atuando como integrantes do processo de produção das políticas curriculares, perfurando e ressignificando as prescrições de instâncias exteriores e construindo micro processos que redefinem as relações de poder-saber previstas na gestão das políticas curriculares.
Significant Symptom Resolution of Spinal Lipomatosis with Weight Loss
Authors: Haggerty Treah , Milligan Savannah , Davisson Laura , Cavrak Megan , Imlay Riley , Sedney Cara
Published: September 2022

71-year-old male with epidural spinal lipomatosis and spondylolisthesis.
Conservative treatment failed, and a spinal fusion and laminectomy were
performed. Postoperatively, the patient reported a reduction in pain;
however, the pain recurred soon after surgery. After losing 53 pounds
with medical management, the patient reported a complete absence of
pain.
Congenital Hyporhinia with Associated Malformations: Case report of a rare Congenital Anomaly
Authors: mlay kenneth , Chussi Desderius , Mtenga Philibert , shija peter , Msele Angela
Published: September 2022

Congenital hyporhinia or partial arrhinia is a very rare congenital
abnormality of nasal embryogenesis with unknown etiology. It is commonly
associated with other craniofacial anomalies which are thought to be
caused by an absent or rudimentary nose. A case of congenital hyporhinia
with associated other anomalies is presented and discussed.
Development of whole-cell biocatalyst for hydrolyzing high hydrophobic pyrethroid pesticide by functional display of Aminopeptidase on the surface of Saccharomyces cerevisiae
Authors: Lu Liucui , Li Qingyun , Liu Youyan , Yuan Xiaoli , Bai Xue , Li Qunliang , Li Lin , Tang Aixing
Published: September 2022

In this study, we developed two new whole-cell biocatalysts by
immobilizing aminopeptidase (Aps) on the surface of yeast cells, using
N-terminal fusion and C-terminal fusion through lectin mediated display
system. After the two strains were cultured in the medium with galactose
as inducer for 48 hours, the activity of expressing Aps was at a high
level of 0.25 U/OD600/mL and 0.12 U/OD600/mL. The correct location of
Aps was confirmed by immunofluorescence analysis and flow cytometry.
Afterwards two whole cell catalysts could be reused with high stability
as it retained more than 70% of initial activity after ten repeated
batch reactions. Using β-cypermethrin (β-CP) as a substrate, the
effectiveness of two new whole-cell catalysts in the treatment of highly
hydrophobic organic pollutants was evaluated. The results showed that
when the concentration of β-CP was 200 mg·L , the
hydrolysis rates of the two whole cell catalysts were 33.16 μmol·L
·day and 28.99 μmol·L
·day , and has the ability to
degrade a variety of pyrethroid pesticides. The β-CP residue in lettuce
and cherry tomatoes could be removed more than 70% under the conditions
of the Aga2N-Aps whole cell catalyst preparation dilution of 100 times.
This is the first report on the development of surface display Aps
biocatalyst, which can be used as an effective and renewable alternative
for the treatment of highly hydrophobic organic pollutants.
PENGEMBANGAN MEDIA PEMBELAJARAN BERBASIS ANDROID PADA MATERI BANGUN RUANG SISI DATAR KUBUS DAN BALOK KELAS VIII SMP
Authors: Nissa Nadia Hairul , Sthephani Aulia , Effendi Leo Adhar , Anggraini Lilis Marlina
Published: September 2022

ABSTRAK

Pengembangan media pembelajaran berbasis android ini tergolong ke dalam penelitian dan pengembangan. Penelitian ini bertujuan untuk melihat hasil validitas dari pengembangan media pembelajaran berbasis android pada materi bangun ruang sisi datar kubus dan balok kelas VIII SMP. Dalam penelitian ini, model pengembangannya mengacu pada model pengembangan R&D yang telah dimodifikasi sesuai kebutuhan peneliti, dengan tahap-tahapannya yaitu: (1) potensi dan masalah, (2) pengumpulan data, (3) desain produk, (4) validasi desain, (5) revisi desain, (6) produk akhir. Instrumen penelitian yang digunakan yaitu validasi. Teknik pengumpulan data menggunakan lembar validasi dengan skala likert. Teknik analisis data yang dilakukan yaitu analisis deskriptif. Tahap potensi dan masalah, peneliti melakukan analisis terhadap situasi pendidikan dan wawancara, lalu mengumpulkan data yang berkaitan dengan potensi dan masalah. Setelah itu peneliti merancang desain produk media pembelajaran. Hasil analisis validasi penelitian oleh tiga validator diperoleh rata-rata validasi media pembelajaran sebesar 82,87% yang tergolong kategori cukup valid. Kesimpulan penelitian menunjukkan bahwa media pembelajaran berbasis android teruji valid.
Genetic Racial Profiling
Authors: Bartram Isabelle , Plümecke Tino , Schultz Susanne
Published: September 2022

Over the last two decades, the analysis of DNA traces found at a crime scene have expanded the already established forensic DNA analysis for identification to include new techniques intended to predict a criminal suspect’s externally visible characteristics, such as eye, hair and skin colour (‘forensic DNA phenotyping’), or his or her ethnic, continental or regional origin (‘biogeographical ancestry’). In this paper, we conduct a dispositive analysis to investigate how extended DNA analysis in forensics catalyses inherent processes of racialization at three different levels: 1) in the categorizations that are integral to this technology, 2) in the images of the ‘dangerous other’ combined with inflated expectations regarding these technologies’ effectiveness that have framed discourses regarding the legalization of this technology, and 3) in the biases and stereotypes which often guide investigative practices using these technologies. We demonstrate that this is an example par excellence of how the interaction between different practice dimensions can exacerbate unintended discriminating, racialising and racist effects.
Delitos de odio. Incidencia de la pandemia COVID en los delitos de odio en España
Authors: Giraldo Pérez Serafín
Published: September 2022

Un delito de odio es cualquier acto delictivo el que el delincuente está motivado, en todo o en parte, por prejuicios sociales contra un grupo en particular. Las condiciones contextuales amenazantes que son adversas, como en la actualidad lo es la COVID-19, pueden fomentar el prejuicio y la discriminación hacia otras personas que forman parte de minorías o grupos desfavorecidos. El objetivo de este trabajo es analizar la evolución del crimen de odio desde 2014 hasta la actualidad en el ámbito de los cambios que se produjeron y busca, mediante el estudio comparativo y estadístico, ver la evolución del índice de delincuencia y criminalidad específicamente en los delitos de odio. Se compiló documentación publicada entre el 2014-2021 mediante las bases de datos Scielo, Dialnet, y Redalyc. Se concluye que los delitos de odio durante el período 2014-2020 han tenido una tendencia al alza, a excepción del año 2020, cuyo descenso puede estar influenciado por la Covid-19 que ameritó el confinamiento.
Application of calculus function and value chain analysis method in the quantification of financial flexibility management indicators
Authors: Chen Xuming , Zhu Jianfa , Jiang Xin , Xie Yan , Al-Ethawi Ahlam
Published: September 2022

n order to explore the application of calculus function and value chain analysis method in the quantification of financial flexibility management indicators. Firstly, by combing the development process of value chain accounting exploration and cost management at home and abroad, a more complete value chain accounting framework is constructed. Then, a practical case is applied to illustrate the advantages of introducing value chain accounting and its analysis method to improve cost management in advanced manufacturing industry. Finally, it introduces the preconditions for using value chain accounting and its analysis methods to improve cost management. The experimental results show that after the implementation of the improved cost management system, it largely depends on information technology to transfer cost and other confidential information. At this time, it is also very important to do a good job in internal control, otherwise it will lead to the leakage of enterprise confidential information and unimaginable consequences. This requires enterprises to establish a rigorous and complete risk assessment system, including risk identification, risk analysis and risk resolution, implement control activities on this basis, and establish a perfect internal supervision and daily operation and maintenance mechanism of information system. It is proved that the calculus function and value chain analysis method can effectively quantify the financial flexibility management index.
KORELASI ANTARA INDEKS MASSA TUBUH TERHADAP ARKUS KAKI PADA SISWA KELAS 4-6 SD DI SDN 18 DANGIN PURI DENPASAR UTARA
Authors: Veda Santi Sagung Ayu Priti Mawar , Thanaya Sayu Aryantari Putri , Sundari Luh Putu Ratna , Dinata I Made Krisna
Published: September 2022

Pendahuluan: Berat badan berlebih merupakan kondisi yang dapat dialami oleh seluruh kalangan usia, termasuk usia anak sekolah 6-12 tahun. Bertambahnya berat badan akan meningkatkan tekanan pada telapak kaki sehingga menjadi datar atau disebut flat foot dan dapat menimbulkan dampak berkepanjangan bagi anak-anak.

Metode: Penelitian ini menggunakan pendekatan cross sectional bersifat analitik yang dilakukan secara door-to-door di wilayah Denpasar Utara. Jumlah sampel penelitian yaitu 43 siswa dari total populasi sebanyak 44 siswa dikarenakan 1 siswa drop out. Variabel independen yang diukur yaitu IMT, sedangkan variabel dependen yaitu arkus kaki yang diukur dengan arch index. Variabel yang dikontrol dalam penelitian ini yaitu tingkatan kelas, serta variabel yang dapat mempengaruhi penelitian ini yaitu usia, jenis kelamin, penggunaan alas kaki yang diukur menggunakan kuisioner penggunaan alas kaki dalam 7 hari terakhir, serta aktivitas fisik yang diukur menggunakan kuisioner The Physical Activity Questionnaire for Older Children (PAQ-C).

Hasil: Teknik analisis data yang digunakan yaitu uji hipotesis spearman’s rho. Diperoleh nilai p sebesar 0,1 (p>0,05) dan didapatkan prevalensi paling tinggi pada IMT normal dan arkus kaki low arch yaitu masing-masing sebesar 24 orang (56%) dan 22 orang (51%).

Simpulan: Dapat disimpulkan bahwa tidak terdapat korelasi antara IMT dengan arkus kaki pada siswa kelas 4-6 SD di SDN 18 Dangin Puri Denpasar Utara. Berdasarkan hasil penelitian tersebut, peneliti memprediksi penelitian ini dipengaruhi oleh situasi dan kondisi ketika penelitian akibat pandemi COVID-19.

 

Kata Kunci: kaki datar, arkus kaki, indeks massa tubuh, siswa sekolah dasar
EFEK JANGKA PENDEK BIOFEEDBACK POSTURAL CORRECTION EXERCISE PADA CRANIOVERTEBRAL ANGLE SISWA DENGAN ASYMPTOMATIC FORWARD
Authors: Prasana I Gede Eka Juli , Negara Anak Agung Gede Angga Puspa
Published: September 2022

Pendahuluan: Memasuki Revolusi Industri 4.0 membawa banyak dampak bagi sistem kehidupan manusia, salah satunya adalah kerugian mekanis yang dialami seseorang disebabkan oleh terjadinya awkward position ketika sedang melakukan aktivitas atau pekerjaannya saat duduk, belajar, menggunakan perangkat elektronik, dan sebagainya, hingga kerap muncul masalah muscle imbalance yang selanjutnya menyebabkan terjadinya forward head posture. Tujuan penelitian ini adalah untuk mengetahui efek jangka pendek biofeedback postural correction exercise dalam intervensi postural correction untuk menangani masalah asymptomatic forward head posture.

Metode: Penelitian menggunakan rancangan eksperimental pre-post test control group design dengan simple random sampling, dan jumlah subjek sebanyak 28 orang yang dibagi ke dalam 2 kelompok. Kelompok 1 mendapatkan penambahan biofeedback postural correction exercise pada metode postural correction standar sedangkan Kelompok 2 mendapatkan metode postural correction standar. Penelitian dilakukan sebanyak 3 kali pertemuan.

Hasil: perbedaan rerata peningkatan sudut craniovertebral dianalisis dengan paired sample t-test sebelum dan setelah intervensi pada Kelompok 1 dengan nilai p=0,030 (p<0,05) dengan artian terdapat peningkatan sudut yang bermakna pada craniovertebral sebelum dan setelah intervensi biofeedback postural correction exercise metode standar. Pengujian hipotesis sebelum dan setelah intervensi pada Kelompok 2 didapatkan nilai p=0,245 (p>0,05) yang berarti bahwa tidak ada peningkatan sudut craniovertebral yang bermakna pada craniovertebral sebelum dan setelah intervensi metode standar.

Simpulan: Biofeedback postural correction exercise lebih baik dalam menciptakan efek adaptasi jangka pendek pada peningkatan craniovertebral angle dibandingkan dengan metode postural correction standar

 

Kata Kunci: muscle imbalance, forward head posture, pressure biofeedback
KEBIASAAN POSISI DUDUK SAAT PEMBELAJARAN JARAK JAUH (PJJ) BERISIKO MENGALAMI NYERI PUNGGUNG BAWAH PADA SISWA SMK ANALIS KESEHATAN DITKESAD DI JAKARTA TIMUR
Authors: Ayuningtyas Winda Tri , Sativani Zahra , Hariandja Andy Martahan Andreas
Published: September 2022

Pendahuluan: Pandemi COVID-19 membuat siswa SMA/SMK melakukan PJJ menggunakan device, dan seringkali tidak memperhatikan posisi duduk dengan baik ketika di depan layar device, sehingga menimbulkan adanya risiko nyeri pada punggung bagian bawah.

Metode: Analitik observasional melalui pendekatan cross-sectional. Penelitian melalui platform online berupa video conference dan pengisian google formulir pada April-Mei 2021 dengan sampel sejumlah 80 orang. Teknik pengumpulan data dengan pengisian kuesioner REBA (Rapid Entire Body Assessment) dan SBST (StarT Back Screening Tool). Analisa bivariat dengan uji chi-square.

Hasil: Uji chi-square menghasilkan nilai p-value 0,001 dengan p<?=0,05 dan tabel 2x2 menunjukkan skor odds ratio 26,267.

Simpulan: Hubungan antara kebiasaan posisi duduk saat pembelajaran jarak jauh (PJJ) terhadap risiko nyeri punggung bawah pada siswa SMK Analis Kesehatan DITKESAD di Jakarta Timur ditemukan adanya signifikansi, responden yang memiliki kebiasaan posisi duduk risiko tinggi akan berisiko 24,267 kali merasakan nyeri punggung bawah dibandingkan responden yang memiliki kebiasaan posisi duduk risiko sedang.

 

Kata Kunci: posisi duduk, nyeri punggung bawah