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Computational thinking: an analysis through structured programming using Scratch 计算思维:通过使用Scratch进行结构化编程的分析
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.010
A. Kuz
In recent years, numerous initiatives have emerged to develop computational thinking. Computational thinking and programming are closely related they are both tools for working with algorithmic concepts. ICTs and, and specifically computer programs with a playful orientation for teaching programming are relevant since they take into consideration aspects related to the educational environment. Game-based learning is a complement that allows taking advantage of the playful component of games to train computational thinking and, therefore, various others skills. Scratch is one of the most used tools to teach programming, through visual and playful programming languages that seek to promote computational skills that involve problem solving, through active and constructive learning. In this study, theoretical foundations of structured programming are analyzed based on simple computing concepts such as handling sequences, control instructions such as loops and conditionals, and their adaptation using Scratch. For this article, a qualitative analysis is presented, supported by descriptive research. The partial findings, at this point, suggest the usefulness of applying video games to train computational thinking skills. In this way, opens the possibility of proposing extended uses of other interactive games such as Lightbot, PilasEngine, Pilas Bloques.
近年来,出现了许多发展计算思维的倡议。计算思维和编程密切相关,它们都是处理算法概念的工具。信息和通信技术,特别是以有趣为导向的计算机程序的教学编程是相关的,因为它们考虑到与教育环境相关的方面。基于游戏的学习是一种补充,它允许利用游戏的有趣成分来训练计算思维,从而训练各种其他技能。Scratch是最常用的编程教学工具之一,通过可视化和有趣的编程语言,通过积极和建设性的学习,寻求提高涉及解决问题的计算技能。在本研究中,结构化编程的理论基础是基于简单的计算概念,如处理序列,控制指令,如循环和条件,以及它们的适应使用Scratch分析。本文采用定性分析和描述性研究相结合的方法。在这一点上,部分发现表明应用电子游戏训练计算思维技能是有用的。通过这种方式,打开了提议扩展其他互动游戏(如Lightbot, PilasEngine, Pilas Bloques)使用的可能性。
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引用次数: 0
Perceptions of first- and second-year professors of University 对大学一、二年级教授的看法
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.007
P. M. Morawicki, A. G. Pedrini, Alicia Tetzlaff
The following paper aims to analyse the perceptions or images of a good university student and to identify the competences needed to be a good student, according to the implicit theories held by first and second year teachers of the University Teacher Training Course in Biology at the Faculty of Exact, Chemical and Natural Sciences of the National University of Misiones. The methodological approach of the research is mixed and of flexible design. The instruments used were the questionnaire and the interview. From the analysis of the data, it can be seen that the teachers consider that a good student should have transversal competences such as teamwork, autonomy and time organisation. They also mentioned study habits which would be related to causal and linear learning linked to direct and interpretative theory. For women and men, students possess instrumental and interpersonal transversal competences; men add systemic competences. The accompaniment strategies mentioned by the teachers coincide with their conception of learning.
根据米西奥内斯国立大学精确、化学和自然科学学院生物大学教师培训课程一年级和二年级教师的内隐理论,本文旨在分析一名优秀大学生的感知或形象,并确定成为一名优秀学生所需的能力。本研究的方法方法是混合的,设计灵活。使用的工具是问卷调查和访谈。从数据的分析可以看出,老师认为一个好学生应该具有横向能力,如团队合作,自主性和时间组织。他们还提到了与直接理论和解释理论相关的因果和线性学习习惯。无论男女,学生都具备工具和人际交往的横向能力;男性增加了系统能力。教师提到的陪伴策略与他们的学习理念是一致的。
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引用次数: 0
Headset usability in the covid pandemic 19 covid - 19大流行期间的耳机可用性
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.001
Elizandra de Andrade Fonseca, Flávia Heloisa Vizioli Libório, Ekaterina Emmanuil Inglesis Barcellos, G. Botura
The use of headphones was accentuated starting from the year 2020, inserted in the online universe of meetings, conferences, congresses, lives, classes, and videos, in the home office system, due to social isolation, resource resulting from health recommendations, pandemic of Covid 19. The purpose of this work is based on the response of the survey carried out with users to assist the design when elaborating the headphones project, considering the usability and choice factors from the perspective of the user’s perception. Based on a literature review, a questionnaire was designed aimed at the perception of the fundamental requirements of the device, which led to essential factors directing future design projects, in which there is alignment between physical and cognitive ergonomics, aiming at comfort, usage satisfaction, and health of its users.
从2020年开始,由于社会隔离、健康建议带来的资源、Covid - 19大流行等原因,耳机的使用在会议、会议、大会、生活、课堂、视频等在线世界中得到了加强。这项工作的目的是根据与用户进行的调查的反馈来协助设计在阐述耳机项目时,从用户感知的角度考虑可用性和选择因素。在文献综述的基础上,设计了一份问卷,旨在了解设备的基本要求,从而得出指导未来设计项目的基本因素,其中物理和认知人体工程学之间存在一致性,旨在使用户的舒适度,使用满意度和健康。
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引用次数: 0
Anti-condensation, Thermal Insulation and Intumescent Coating 防冷凝、保温、膨胀涂料
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.004
D. Rizzolo, C. Schvezov, C. Giudice
A formula of a paint for interior use for roofing sheet zinc was optimized. The properties developed and optimized were thermal insulation, anticondensation capacity and fire-retardant properties. A fire-retardant latex coating was used as the formulation base and three types of fillers were investigated: hollow glass microspheres, hollow ceramic microspheres and expanded perlite. The thermal transfer coefficient of the different coatings, the water absorption capacity and the thermal flame transmission were evaluated. From the results, it was determined that the formulation with the best performance, both in thermal insulation and in water absorption capacity, was the one that contained expanded perlite. Regarding the thermal transmission due to the action of the flame, no significant difference was observed between the different loads used.
优化了屋面锌板室内涂料的配方。开发和优化的性能是隔热性能、抗凝性能和阻燃性能。以一种阻燃乳胶涂料为配方基础,研究了中空玻璃微珠、中空陶瓷微珠和膨胀珍珠岩三种类型的填料。对不同涂层的传热系数、吸水性和热火焰传递性能进行了评价。结果表明,含膨胀珍珠岩的配方在保温性能和吸水性能上均最佳。在火焰作用下的热传递方面,不同负荷下的热传递没有显著差异。
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引用次数: 0
Effect of the incorporation of dehydrated cassava puree in the texture of pasta doughs 脱水木薯泥对面食面团质地的影响
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.006
Ana B. Monaca, A. Cazzaniga, A. R. Linares, M. Brousse
The possibility of replacing wheat with non-conventional flours in the production of pasta still represents a technological challenge. This work aimed to study the effect of replacing wheat flour with dehydrated cassavapuree on the texture of pasta doughs. Formulations were made by substituting 20%, 30%, 40%, and 50% wheatflour for dehydrated cassava puree. A control dough was formulated with 100% wheat flour to obtain a reference behavior. The moisture was determined at 105°C. Hardness, cohesiveness, elasticity, consistency, toughness, andextensibility were analyzed with a texturometer. Dehydrated cassava puree caused a drop in moisture content andalso a significant difference in the texture of the substituted doughs. The doughs with dehydrated cassava puree were harder, more cohesive, elastic, consistent, and resistant to elongation than the control, however, they were less extensible. It was concluded that the low moisture presented by the doughs substituted with dehydratedcassava puree is responsible, in part, for the changes in their texture.
在意大利面生产中,用非常规面粉代替小麦的可能性仍然是一项技术挑战。本研究旨在研究脱水木薯泥代替小麦粉对面食面团质地的影响。用20%、30%、40%和50%的小麦粉代替脱水木薯泥制成配方。用100%小麦粉配制对照面团以获得参考性能。在105°C时测定水分。用织构仪对其硬度、内聚性、弹性、稠度、韧性和延展性进行了分析。脱水木薯泥导致水分含量下降,并且替代面团的质地也有显着差异。与对照组相比,脱水木薯泥的面团更硬,更有凝聚力,弹性,一致性和抗伸长性,但其可拉伸性较差。结论是,用脱水木薯泥代替面团所呈现的低水分是其质地变化的部分原因。
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引用次数: 0
Antifungal capacity of aqueous extracts of ilex paraguariensis fruitsagainst dermatophite fungi 巴拉圭冬青果实水提物对嗜皮真菌的抑菌能力
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.003
Beda E. Mereles Rodríguez, Jacqueline N. Fiedler, M. Chade
Increasing resistance to antifungal agents and the toxicity of currently available antifungal agents has stimulated the development of new compounds with antifungal action of natural origin. Numerous scientific studies have reported on the biomedical and pharmacological properties of the de-rivatives of Ilex paraguariensis (Yerba mate). Very few scientific studies have been conducted on the phytochemical and/or pharmacological properties of its fruits, and practically none on its antimicrobial capacity. The aim of this study was to evaluate the in vitro antifungal capacity of aqueous extracts of I. paraguariensis fruits on dermatophyte fungi. Strains isolated from clinical samples of Trichophyton men-tagrophytes complex, Trichophyton rubrum, Microsporum canis, Trichophyton tonsurans and Nannizzia gypsea were used. To evaluate the antifungal capacity of the aqueous extract of yerba mate (EAFYM), a stock solution of 500 mg/ml was prepared. The quantitative microdilution method was applied in RPMI broth. A fungal inoculum of 1-3 x103 CFU/ml was used. Controls for fungal growth, sterility and commercial reference antifungals were performed. Cultures were incubated for 96 h at 35 °C. The minimum concentration of EAFYM that produced complete inhibition of fungal growth was determined by visual observation and subsequent puncture on solid medium. It is concluded that EAFYM has in vitro antifungal activity against the dermatophyte strains studied, ranging from 31.25 to 125 mg/ml.
抗真菌药物耐药性的增加和现有抗真菌药物的毒性刺激了具有天然抗真菌作用的新化合物的开发。许多科学研究报道了巴拉圭冬青(马黛茶)衍生物的生物医学和药理学特性。关于其果实的植物化学和/或药理学特性的科学研究很少,而关于其抗菌能力的科学研究几乎没有。本研究的目的是评价巴拉圭松果实水提物对皮肤真菌的体外抑菌能力。临床分离菌株为:毛癣菌(Trichophyton man -tagrophytes complex)、红毛癣菌(Trichophyton rubrum)、犬小孢子菌(Microsporum canis)、疣毛癣菌(Trichophyton tonsurans)和石膏毛癣菌(Nannizzia gypsea)。为了评价马茶叶水提物(EAFYM)的抑菌能力,制备了500 mg/ml的原液。采用微量定量稀释法对RPMI肉汤进行测定。真菌接种量为1-3 × 103 CFU/ml。进行真菌生长、无菌性和商业参考抗真菌药的对照。培养物在35℃下孵育96 h。通过肉眼观察和在固体培养基上穿刺确定EAFYM对真菌生长产生完全抑制的最小浓度。结果表明,EAFYM对皮肤真菌的体外抑菌活性为31.25 ~ 125 mg/ml。
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引用次数: 0
Techno-economic evaluation of an industrial-scale chocolate ice cream production process 工业规模巧克力冰淇淋生产工艺的技术经济评价
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.009
Amaury Pérez Sánchez, Yiunan Blanco Gómez, Daimel Sánchez de la Fuente
Ice cream is a dairy product with refreshing features, pleasing aroma and appearance as a result of the addition of different ingredients. Currently, there is little related documentation related to the economic evaluation of ice cream production plants, and none related to the simulation in SuperPro Designer of this type of process. In this paper, the techno-economic evaluation for an industrial-scale chocolate ice cream production plant was carried out. The production plant was based in Cuba and designed to produce 808 containers of 10 L of ice cream per batch (961,520 L per year). The mass and energy balance, as well as the main profitability and economic indicators of the process, were determined by the application of SuperPro Designer simulator. The Net Present Value, Internal Rate of Return and Payback Time of the project were US $ 1,444,000, 24.45% and 4.45 years, respectively. The findings indicated that the chocolate ice cream production plant was feasible under the current economic condition of Cuba. The proposed chocolate ice cream production process begins to be unprofitable from a value of the cow milk unit cost of US $ 1.50/L and from a value of the interest rate of 24.45%.
冰淇淋是一种乳制品,由于添加了不同的成分,具有清爽、香气和外观的特点。目前,很少有与冰淇淋生产工厂经济评价相关的文献,也没有在SuperPro Designer中对这类工艺进行模拟。本文对某工业规模的巧克力冰淇淋生产装置进行了技术经济评价。该生产厂设在古巴,设计生产808个容器,每批10升冰淇淋(每年961,520升)。利用SuperPro Designer仿真软件确定了该工艺的质量和能量平衡,以及主要的盈利能力和经济指标。项目净现值为144.4万美元,内部收益率为24.45%,投资回收期为4.45年。调查结果表明,在古巴目前的经济条件下,巧克力冰淇淋生产厂是可行的。拟议的巧克力冰淇淋生产过程从牛奶单位成本1.50美元/升和利率24.45%的价值开始无利可图。
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引用次数: 1
Sublimation intended for small formats: historical dimension, procedural steps, supplies and equipment 用于小格式的升华:历史尺寸,程序步骤,耗材和设备
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.005
David Guilhon, Rodolfo Nucci Porsani, L. C. Paschoarelli, Olímpio José Pinheiro
Sublimation is a digital printing process that emerged as a response to gaps left by the graphic limitations of screen printing. But, in the recent history of digital printing, the adaptation of inks in home printers for sublimation of smallruns and formats, resulted in the exponential popularization of the technology. However, the scientific knowledgeabout sublimation is still incipient, especially the one that deals with small formats, common in the workshops of entrepreneurs in the personalized branch. Therefore, this article seeks to present in a detailed way the sublimationof small formats, its historical dimension, procedural steps, inputs and equipment.
升华是一种数字印刷工艺,作为对丝网印刷图形限制留下的空白的回应而出现。但是,在最近的数字印刷历史中,家用打印机中的油墨用于小尺寸和格式的升华,导致了该技术的指数级普及。然而,关于升华的科学知识仍处于起步阶段,特别是处理小格式的知识,这在个性化部门的企业家研讨会中很常见。因此,本文试图以一种详细的方式呈现小格式的升华,它的历史维度,程序步骤,投入和设备。
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引用次数: 0
Physicochemical characterisation of barley malts available for theArgentine craft beer industry 用于阿根廷精酿啤酒工业的大麦麦芽的理化特性
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.002
M. Ortega, R. Martinet, Germán Campetelli
According to market statistics, the consumption and production of craft beer in the world and in Argentina have exponentially grown in recent years. However, there is no complete characterisation of the malts available for these small producers, even though they are one of the fundamental raw materials in beer production. The aim of this work was to characterise the base malts used in craft production, given that their physicochemical properties are a fundamental parameter for conditioning the final product. Moisture, ash, protein, lipids, total fibre and carbohydrates were determined according to EBC and AOAC methods, obtaining the following results, respectively: 5.15 g/100g ± 0.85; 1.91 g/100g ± 0.12; 10.44 g/100g ± 0.21; 1.76g/100g ± 0.17; 4.46 ± 0.62; 76.28g/100g ± 1.59. Protein profiles of the malt extracts were also characterised by vertical SDS-PAGE electrophoresis according to the Laemmli method, which have a direct impact on beer quality. Finally, a principal component statistical analysis was performed on the collected data. The values obtained are in agreement with those reported by other authors for malts of other varieties and geographical origin.
据市场统计,近年来,世界和阿根廷精酿啤酒的消费量和产量呈指数级增长。然而,尽管麦芽是啤酒生产的基本原料之一,但对于这些小生产商来说,麦芽并没有完整的特征。这项工作的目的是表征工艺生产中使用的基础麦芽,因为它们的物理化学性质是调节最终产品的基本参数。水分、灰分、蛋白质、脂肪、总纤维和碳水化合物按EBC法和AOAC法测定,得到的结果分别为:5.15 g/100g±0.85;1.91 g/100g±0.12;10.44 g/100g±0.21;1.76g/100g±0.17;4.46±0.62;76.28g/100g±1.59。根据Laemmli法,用SDS-PAGE垂直电泳对麦芽提取物的蛋白质谱进行了表征,这对啤酒的质量有直接的影响。最后,对收集到的数据进行主成分统计分析。所获得的值与其他作者报告的其他品种和地理来源的麦芽的值一致。
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引用次数: 0
Impacts of governmental and institutional policies - guaranteeing rights - on the formative trajectories of Tourism students of the FHyCS - UNaM 政府和机构政策-保障权利-对FHyCS - UNaM旅游学生的形成轨迹的影响
Pub Date : 2023-05-01 DOI: 10.36995/j.recyt.2023.39.008
Claudia Wrobel, M. Franco, Diana Farías, María Alonso, Mirta González, Esther Källsten, S. Paredes, Horacio Ramos, E. Simón, Patricia Soto
In the analysis of the multicausalities that have an impact on the high levels of university drop-out rates in the Tourism courses at the Faculty of Humanities and Social Sciences, it is considered important to address the impact of national and institutional programmes and grant projects that seek to mitigate this situation.In this way, the set of scholarships provided by the institution has been analysed, based on a quantitative study of data collection by means of surveys to admissions of the cohorts 2017 and 2018, which determined which have been the most demanded scholarships.Finally, we have described a programme - PATFEs - its scope and limitations, as a policy designed to address the complex process of transition between secondary and higher education, which has not been formally recognised by the teaching staff of Tourism degree courses.
在分析对人文和社会科学学院旅游课程的高辍学率产生影响的多重因素时,认为必须处理旨在减轻这种情况的国家和机构方案和赠款项目的影响。通过这种方式,根据对2017年和2018年入学人数的调查收集的数据进行定量研究,分析了该机构提供的一系列奖学金,从而确定了最需要的奖学金。最后,我们描述了一个方案- patfe -它的范围和局限性,作为一项政策,旨在解决中学和高等教育之间的复杂过渡过程,这还没有得到旅游学位课程的教学人员的正式承认。
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引用次数: 0
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