cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.5645269
title: ACADEMIC LEVELING PROGRAM: FINDINGS OF AN INTERVENTION PROGRAM ON SOCIALLY VULNERABLE STUDENTS AT UNIVERSIDAD DE CONCEPCIÓN

description: ABSTRACT: This paper presents the findings of the assessment of 120 students’ academic performance, who benefited from an academic leveling program implemented by the University of Concepción. The purpose of this program is to support the stay and to improve the academic performance of first year university students of socioeconomic vulnerable origin. A quantitative methodology was used and a correlational study was defined; the results show the stay reached 87%, while participants’ averaged grade was 5.1 on a scale from 1 to 7. This allows improving participants’ past results and accomplishing the expected indicators. The study habits test proved to be the best predictor of academic achievement. These results were complemented by two focus groups that show the students’ high value of the program as a facilitating instance of their adaptation to the university demands. Finally, there is a reflection on public policies that seek to strengthen higher education equity in Chile.
DOI: 10.6084/m9.figshare.5645269.v1
title: ACADEMIC LEVELING PROGRAM: FINDINGS OF AN INTERVENTION PROGRAM ON SOCIALLY VULNERABLE STUDENTS AT UNIVERSIDAD DE CONCEPCIÓN

description: ABSTRACT: This paper presents the findings of the assessment of 120 students’ academic performance, who benefited from an academic leveling program implemented by the University of Concepción. The purpose of this program is to support the stay and to improve the academic performance of first year university students of socioeconomic vulnerable origin. A quantitative methodology was used and a correlational study was defined; the results show the stay reached 87%, while participants’ averaged grade was 5.1 on a scale from 1 to 7. This allows improving participants’ past results and accomplishing the expected indicators. The study habits test proved to be the best predictor of academic achievement. These results were complemented by two focus groups that show the students’ high value of the program as a facilitating instance of their adaptation to the university demands. Finally, there is a reflection on public policies that seek to strengthen higher education equity in Chile.
DOI: 10.6084/m9.figshare.5645266
title: Virtual learning object and environment: a concept analysis

description: ABSTRACT Objective: To analyze the concept of virtual learning object and environment according to Rodgers' evolutionary perspective. Method: Descriptive study with a mixed approach, based on the stages proposed by Rodgers in his concept analysis method. Data collection occurred in August 2015 with the search of dissertations and theses in the Bank of Theses of the Coordination for the Improvement of Higher Education Personnel. Quantitative data were analyzed based on simple descriptive statistics and the concepts through lexicographic analysis with support of the IRAMUTEQ software. Results: The sample was made up of 161 studies. The concept of "virtual learning environment" was presented in 99 (61.5%) studies, whereas the concept of "virtual learning object" was presented in only 15 (9.3%) studies. Conclusion: A virtual learning environment includes several and different types of virtual learning objects in a common pedagogical context.
DOI: 10.6084/m9.figshare.5645266.v1
title: Virtual learning object and environment: a concept analysis

description: ABSTRACT Objective: To analyze the concept of virtual learning object and environment according to Rodgers' evolutionary perspective. Method: Descriptive study with a mixed approach, based on the stages proposed by Rodgers in his concept analysis method. Data collection occurred in August 2015 with the search of dissertations and theses in the Bank of Theses of the Coordination for the Improvement of Higher Education Personnel. Quantitative data were analyzed based on simple descriptive statistics and the concepts through lexicographic analysis with support of the IRAMUTEQ software. Results: The sample was made up of 161 studies. The concept of "virtual learning environment" was presented in 99 (61.5%) studies, whereas the concept of "virtual learning object" was presented in only 15 (9.3%) studies. Conclusion: A virtual learning environment includes several and different types of virtual learning objects in a common pedagogical context.
DOI: 10.6084/m9.figshare.5645263
title: Effect of pH on Optic and Structural Characterization of Chemical Deposited AgI Thin Films

description: AgI thin films were grown on amorphous commercial glass substrates with chemical bath deposition (CBD) at different pH values (2, 3, 4, 5, 6), 6 hours deposition time and 60 °C. The structure of the nanocrystals was characterized by X-ray diffraction (XRD). The ratio of Ag+ and I- ions changed the crystalline structures. The presence of the Ag+ ions produces the γ-phase of AgI and excess of iodine concentration produces β-phase of AgI. The pH: 4 was like a transition pH for these phases. The number of crystallites per unit area has maximum value at pH: 5, as the structure is re-crystallization to hexagonal phase. Also, the thicknesses of produced thin films were decreased with increased pH values. Therefore, transmission, reflection, extinction coefficients and refractive index of the materials were affected by thicknesses, and calculated to be 32, 35, 3, 11, 9 (%) - 27, 25, 61, 45, 49 (%) - 0.036, 0.032, 0.067, 0.107, 0.075 and 3.21, 3.02, 5.16, 8.35, 5.70 in 550 nm at pH: 2-3-4-5-6 values, respectively. The exciton peaks of AgI were observed at between 320 and 420 nm. Surface properties were investigated by using scanning electron microscopy (SEM).
DOI: 10.6084/m9.figshare.5645263.v1
title: Effect of pH on Optic and Structural Characterization of Chemical Deposited AgI Thin Films

description: AgI thin films were grown on amorphous commercial glass substrates with chemical bath deposition (CBD) at different pH values (2, 3, 4, 5, 6), 6 hours deposition time and 60 °C. The structure of the nanocrystals was characterized by X-ray diffraction (XRD). The ratio of Ag+ and I- ions changed the crystalline structures. The presence of the Ag+ ions produces the γ-phase of AgI and excess of iodine concentration produces β-phase of AgI. The pH: 4 was like a transition pH for these phases. The number of crystallites per unit area has maximum value at pH: 5, as the structure is re-crystallization to hexagonal phase. Also, the thicknesses of produced thin films were decreased with increased pH values. Therefore, transmission, reflection, extinction coefficients and refractive index of the materials were affected by thicknesses, and calculated to be 32, 35, 3, 11, 9 (%) - 27, 25, 61, 45, 49 (%) - 0.036, 0.032, 0.067, 0.107, 0.075 and 3.21, 3.02, 5.16, 8.35, 5.70 in 550 nm at pH: 2-3-4-5-6 values, respectively. The exciton peaks of AgI were observed at between 320 and 420 nm. Surface properties were investigated by using scanning electron microscopy (SEM).
DOI: 10.6084/m9.figshare.5645260
title: Assessment of different Lippia sidoides genotypes regarding their acaricidal activity against Rhipicephalus (Boophilus) microplus

description: Abstract The aim of this study was to select different genotypes of Lippia sidoides with the highest activity against larvae and engorged females of the tick Rhipicephalus (Boophilus) microplus. The germplasms studied were LSID006, LSID102, LSID103 and LSID104. The LSID104 genotype, that presented carvacrol as a major constituent, was the germplasm with the worst larvicide effect (LC50 2.99 mg/mL). The LSID006 genotype was the least effective against engorged females (LC50 12.46 mg/mL), and it was chemically similar to the LSID102 genotype, which presented the highest acaricide activity (LC50 2.81 mg/mL). We conclude that chemical similarity of the germplasms was not correlated with acaricide activity against R. (B.) microplus. The essential oil of L. sidoides is a potent natural agent. However, the findings of this work provide a better understanding for product development based on this natural product, which must consider synergic effects or the action of minor compounds.
DOI: 10.6084/m9.figshare.5645260.v1
title: Assessment of different Lippia sidoides genotypes regarding their acaricidal activity against Rhipicephalus (Boophilus) microplus

description: Abstract The aim of this study was to select different genotypes of Lippia sidoides with the highest activity against larvae and engorged females of the tick Rhipicephalus (Boophilus) microplus. The germplasms studied were LSID006, LSID102, LSID103 and LSID104. The LSID104 genotype, that presented carvacrol as a major constituent, was the germplasm with the worst larvicide effect (LC50 2.99 mg/mL). The LSID006 genotype was the least effective against engorged females (LC50 12.46 mg/mL), and it was chemically similar to the LSID102 genotype, which presented the highest acaricide activity (LC50 2.81 mg/mL). We conclude that chemical similarity of the germplasms was not correlated with acaricide activity against R. (B.) microplus. The essential oil of L. sidoides is a potent natural agent. However, the findings of this work provide a better understanding for product development based on this natural product, which must consider synergic effects or the action of minor compounds.
DOI: 10.6084/m9.figshare.5645257
title: Characterization of the use of Building Information Modeling in the Distrito Federal, Brazil

description: Abstract The objective of this study is to characterize, for the first time, the use of Building Information Modeling (BIM) by contractors in the Distrito Federal. The main aim is to obtain local data that, after comparing it with national and international data, may express the real situation of BIM in this area. Its periodic repetition and replication in other places may identify tendencies and peculiarities whose knowledge may result in actions that enhance the diffusion of BIM. This research was based on answers obtained from electronic questionnaires sent by email to local construction professionals. The Relative Importance Index was used in part of the data in order to consider the frequency of the answers and their values. The results indicate a low implementation level and mainly superficial uses. In the Discussion section, the possible relations and consequences between the adoption and use of technology, its implementation difficulties, future expectations and personal characteristics of the professionals interviewed and their companies are explored.
DOI: 10.6084/m9.figshare.5645257.v1
title: Characterization of the use of Building Information Modeling in the Distrito Federal, Brazil

description: Abstract The objective of this study is to characterize, for the first time, the use of Building Information Modeling (BIM) by contractors in the Distrito Federal. The main aim is to obtain local data that, after comparing it with national and international data, may express the real situation of BIM in this area. Its periodic repetition and replication in other places may identify tendencies and peculiarities whose knowledge may result in actions that enhance the diffusion of BIM. This research was based on answers obtained from electronic questionnaires sent by email to local construction professionals. The Relative Importance Index was used in part of the data in order to consider the frequency of the answers and their values. The results indicate a low implementation level and mainly superficial uses. In the Discussion section, the possible relations and consequences between the adoption and use of technology, its implementation difficulties, future expectations and personal characteristics of the professionals interviewed and their companies are explored.
DOI: 10.21227/9rq1-4d86
title: MQTT-IoT-IDS2020: MQTT Internet of Things Intrusion Detection Dataset

description: Message Queuing Telemetry Transport (MQTT) protocol is one of the most recent standards used in Internet of Things (IoT) machine to machine communication. The increase in the number of available IoT devices and used protocols reinforce the need for new and robust Intrusion Detection Systems (IDS). However, building IoT IDS requires the availability of datasets to process, train and evaluate these models. The dataset presented in this paper is the first to simulate and MQTT-based network. The dataset is generated using a simulated MQTT network architecture. The network comprises twelve sensors, a broker, a simulated camera, and an attacker. Five scenarios are recorded: (1) normal operation, (2) aggressive scan, (3) UDP scan, (4) Sparta SSH brute-force, and (5) MQTT brute-force attack. The raw pcap files are saved, then features are extracted. Three abstraction levels of features are extracted from the raw pcap files: (a) packet features, (b) Unidirectional flow features and (c) Bidirectional flow features. The csv feature files in the dataset are suited for Machine Learning (ML) usage. Also, the raw pcap files are suitable for the deeper analysis of MQTT IoT networks communication and the associated attacks.
DOI: 10.6084/m9.figshare.5645254
title: Quality of second-crop corn according to the period between harvest and drying

description: ABSTRACT The objective of this study was to evaluate the quality of second-crop corn harvested with different moisture contents as a function of time before drying. The corn grains were harvested with moisture content of 28.5, 22.4, 21 and 19%, and submitted to a temporary storage for ten days, simulating the time between harvesting and drying. Quality was subsequently evaluated every two days, based on the commercial classification of the grains, sanity test and dry bulk density. The results showed that: the increase in moisture content at harvest affects the physical and sanitary quality of second-crop corn, and this effect is aggravated over time; the moisture content of 19% is the one that least affects grain quality during the ten days of temporary storage.
DOI: 10.6084/m9.figshare.5645254.v1
title: Quality of second-crop corn according to the period between harvest and drying

description: ABSTRACT The objective of this study was to evaluate the quality of second-crop corn harvested with different moisture contents as a function of time before drying. The corn grains were harvested with moisture content of 28.5, 22.4, 21 and 19%, and submitted to a temporary storage for ten days, simulating the time between harvesting and drying. Quality was subsequently evaluated every two days, based on the commercial classification of the grains, sanity test and dry bulk density. The results showed that: the increase in moisture content at harvest affects the physical and sanitary quality of second-crop corn, and this effect is aggravated over time; the moisture content of 19% is the one that least affects grain quality during the ten days of temporary storage.
DOI: 10.6084/m9.figshare.5645251
title: Synthesis of Gallium Nitride and Related Oxides Via Ammonobasic Reactive Sublimation (ARS)

description: Ammonobasic reactive sublimation (ARS) is proposed as a novel method to synthesize GaN and related oxides. Results indicate that GaN growth occurs by a nitriding process of Ga and related oxides, establishing a direct dependence on NH4OH amount added as a primary chemical reactive. The samples were grown on p-type Si (111) substrates inside a tube furnace, employing GaN powder and NH4OH. The characterizations of the samples were carried out by XRD, SEM, EDS and PL techniques, revealing the influence of NH4OH on the improvement of GaN synthesis and the enhancement of its optical and structural properties.
DOI: 10.6084/m9.figshare.5645251.v1
title: Synthesis of Gallium Nitride and Related Oxides Via Ammonobasic Reactive Sublimation (ARS)

description: Ammonobasic reactive sublimation (ARS) is proposed as a novel method to synthesize GaN and related oxides. Results indicate that GaN growth occurs by a nitriding process of Ga and related oxides, establishing a direct dependence on NH4OH amount added as a primary chemical reactive. The samples were grown on p-type Si (111) substrates inside a tube furnace, employing GaN powder and NH4OH. The characterizations of the samples were carried out by XRD, SEM, EDS and PL techniques, revealing the influence of NH4OH on the improvement of GaN synthesis and the enhancement of its optical and structural properties.
DOI: 10.6084/m9.figshare.5645248
title: Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

description: A novel magnetically recoverable catalyst (Fe/MWCNT/TiO2-Ag) was prepared in this study by a process that involves few steps. Titanium dioxide doped with silver and iron oxide was deposited on support of multi-walled carbon nanotubes (MWCNT). The synthesized catalysts were characterized by inductively coupled plasma mass spectrometry (ICP-MS), N2 adsorption/desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), infrared spectroscopy (IR) and UV-Vis diffuse reflectance spectra (DRS). Phenol in aqueous solution (50 mg L-1) was used as a model compound for evaluation of UV-Vis (filter cut off for l &gt; 300 nm) photocatalytic activity. The composite catalyst has a high photocatalytic activity, destroying ca. 100% of phenol and removing 85% of total organic carbon in an aqueous solution after 180 min. The Fe/MWCNT/TiO2-Ag catalyst remained stable, presenting an 8% decrease in phenol degradation efficiency after ten consecutive photocatalytic cycles.
DOI: 10.6084/m9.figshare.5645248.v1
title: Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

description: A novel magnetically recoverable catalyst (Fe/MWCNT/TiO2-Ag) was prepared in this study by a process that involves few steps. Titanium dioxide doped with silver and iron oxide was deposited on support of multi-walled carbon nanotubes (MWCNT). The synthesized catalysts were characterized by inductively coupled plasma mass spectrometry (ICP-MS), N2 adsorption/desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), infrared spectroscopy (IR) and UV-Vis diffuse reflectance spectra (DRS). Phenol in aqueous solution (50 mg L-1) was used as a model compound for evaluation of UV-Vis (filter cut off for l &gt; 300 nm) photocatalytic activity. The composite catalyst has a high photocatalytic activity, destroying ca. 100% of phenol and removing 85% of total organic carbon in an aqueous solution after 180 min. The Fe/MWCNT/TiO2-Ag catalyst remained stable, presenting an 8% decrease in phenol degradation efficiency after ten consecutive photocatalytic cycles.
DOI: 10.6084/m9.figshare.5645245
title: Interactive Theory of Breastfeeding: creation and application of a middle-range theory

description: ABSTRACT Objective: To describe a breastfeeding theory based on King's Conceptual System. Method: Theoretical study that used analysis of concept, assertion synthesis, and derivation of theory for the creation of a new theory. Results: King's system components were associated with elements of the breastfeeding process and a middle-range theory was created, which describes, explains, predicts, and prescribes breastfeeding by analyzing factors that precede and affect it, as well as their consequences on the breastfeeding process. Conclusion: The Breastfeeding Interactive Model is abstract enough to be applied in different social, cultural, political, and economic contexts, because it conceptualizes breastfeeding in systemic, dynamic, and procedural aspects. Based on a conceptual model of nursing, it contributes to the scientific construction of the subject; however it can also potentially be applied by other professionals involved in breastfeeding assistance.
DOI: 10.6084/m9.figshare.5645245.v1
title: Interactive Theory of Breastfeeding: creation and application of a middle-range theory

description: ABSTRACT Objective: To describe a breastfeeding theory based on King's Conceptual System. Method: Theoretical study that used analysis of concept, assertion synthesis, and derivation of theory for the creation of a new theory. Results: King's system components were associated with elements of the breastfeeding process and a middle-range theory was created, which describes, explains, predicts, and prescribes breastfeeding by analyzing factors that precede and affect it, as well as their consequences on the breastfeeding process. Conclusion: The Breastfeeding Interactive Model is abstract enough to be applied in different social, cultural, political, and economic contexts, because it conceptualizes breastfeeding in systemic, dynamic, and procedural aspects. Based on a conceptual model of nursing, it contributes to the scientific construction of the subject; however it can also potentially be applied by other professionals involved in breastfeeding assistance.
DOI: 10.6084/m9.figshare.5645242
title: Epoxidized natural rubber and hydrotalcite compounds: rheological and thermal characterization

description: Abstract Epoxidized natural rubber (ENR) and synthetic non-modified hydrotalcite (HT) compounds were prepared and evaluated. Natural rubber (NR) was epoxidized with 20.6% of epoxy groups from a chemical modification of the latex. A sulfur-based curing system formulation with accelerators was used. The amounts of HT in the ENR-HT compositions was varied between 0, 2, 3 and 5 phr. All compositions were evaluated as to cure parameters, rheological properties, thermal resistance and crosslink density. The results showed that the mineral filler does not have a significant influence on the cure parameters. Different methods of crosslink density determination were used (swelling at equilibrium and elastic modulus). The results turn out to be equivalent and rise as the amount of filler is increased. The best results were found for the 5 phr hydrotalcite compound (ENR-HT5).
DOI: 10.6084/m9.figshare.5645239
title: Evaluation of the mechanical and thermal properties of PHB/canola oil films

description: Abstract Packages are essential for the food processing industry. Among the innovative alternatives there is antimicrobial packaging, which aims to reduce or inhibit microbial growing on the food surface. One potential to produce this type of package is poly(3-hydroxybutyrate)-PHB additivated with canola oil. In this work, films of PHB additivated with canola oil were produced in different compositions. Mid-infrared records, tensile mechanical testing and thermal analyses were performed on the films. The results of the mechanical tests indicated that the addition of canola oil to the polymeric matrix of PHB increases the material flexibility. The thermal analyses results showed that the addition of canola oil changes the thermal properties of PHB, such as the melting and crystallization temperatures, maximum crystallization rate and relative crystallinity. The knowledge of these properties is fundamental for the manufacturing process of polymeric materials, due to the specifications required for these materials in the intended applications.