http://ijaers.com/ Open Access international Journal to publish research paper en-us January 2019 Paraná, a South Brazilian state, has a spectacular coast with coves, bays and islands. From the state coast, 90 kilometers are bathed by the Atlantic Ocean and along the coast, 60 communities with a population of 4256 fishermen practice a traditional fishing activity in the bays and open sea. Canoe is the most used boat in this small-scale trade. The question that aimed the research was the importance of the canoe fishing activity by the fishermen perception, then trace an elaborated understanding view about the social and economic effects and finally observe the potential development of the activity in the region and the management and helpful actions by the fishing associations. An exploratory and descriptive field research were conducted by Interviews specially targeted to 30 canoe fisherworkers from Paraná coast cities between July and October 2018 for the study.The research exposed that male fisherworkers are in the 44 age group and still use low technology in the fishing activity. The main potential observed was the good quality of the fish that are sold fresh without being frozed to be sold, the possibility of a production improvement and the exploit and development of an active participation from the female local labour helping. Sale instability, low price out of the summer season and lack of organization by the fisherworkers class and fishing local association were the negative aspects observed. Micro management and micro industrialization could be the solution for the excess of winter production in relation to low production in the summer season, when occurs massive consumers presence. Collective organization could result in a strenghthening trade and bargain involved in the fishing Paraná coast activity. http://ijaers.com/detail/the-traditional-fishing-in-parana-coast-brazil-implications-potentialities-and-socioeconomics-aspects/ Adilson Anacleto, Mariane Neves França, Karoline de Assunção Gomes, Marcos Paulo Marcondes Junior, Vinicius Vieira Surian http://ijaers.com/uploads/issue_files/1-IJAERS-DEC-2018-35-TheTraditional.pdf This article describes the development of an access control with online monitoring based on radio frequency identification (RFID) technology. Access time and date together with user tag code are sent to an online database. The entire process of identification and registration is done by a PIC microcontroller and an embedded Linux system (Raspberry Pi), that by having communication with the Internet updates a database table with the access information. The table with the data can be accessed from any computational device Internet connected. For improving the system, we implement a new version using only the Internet of Things (IoT) module ESP8266 that has a low cost and various peripherals. All information about tag actions is displayed for the user on an LCD display and each action is signaled by a specific beep. http://ijaers.com/detail/cloud-based-rfid-access-control-using-lightweight-messaging-protocol/ Pedro Hericson Machado Araújo, Sandro César Silveira Jucá, Diego Lima Carvalho Gonçalves, Vinícius Ferreira da Silva, Renata Imaculada Soares Pereira, Solonildo Almeida da Silva http://ijaers.com/uploads/issue_files/2-IJAERS-DEC-2018-12-Cloud-based.pdf This paper presents the results of an experiment with the Kali Linux operating system and T50 tool to simulate Distributed Denial of Service (DDoS) attacks on the NodeMCU12e controller device used in Internet of Things (IoT) projects. The motivation for the development of this study arose with the creation of different projects that deal with the subject involving the Internet of Things, as a necessity to evaluate the safety and capacity of these devices during an attack simulation, which affects security and exposes the fragility of architecture and construction model. The results showed the types of attacks that can be carried out, as well as the device's lack of ability to avoid these types of attacks, as well as the speed at which it is possible to stop the device services. http://ijaers.com/detail/an-experiment-with-ddos-attack-on-nodemcu12e-devices-for-iot-with-t50-kali-linux/ Antonio Carlos Bento, Ellen Martins Lopes da Silva, Marcelo Galdino, José Carmino Gomes Júnior http://ijaers.com/uploads/issue_files/3-IJAERS-DEC-2018-6-AnExperiment.pdf The potential of local regions determines the progress of agro-industry. The aim of the study was to determine the effect of drying models and varieties on the levels and quality of sesame oil. The research method used factorial complete randomized design, namely the first factor was drying using the oven and roasting method. The second factor is 5 sesame varieties namely SBR1, SBR2, winnas1, Winnas 2 and independence. Parameters observed included seed moisture content, oil content, oil aroma, oil taste and oil color. The results of the study show that there are interactions between the use of varieties and heating models. http://ijaers.com/detail/test-production-model-on-varieties-to-produce-quality-sesame-oil/ Budi. LS, Puspitawati. I. R, Nurwantara. M.P http://ijaers.com/uploads/issue_files/4-IJAERS-DEC-2018-40-TestProductionModel.pdf Learning by utilizing E-learning facilitates students in the learning process, because E-learning does not require the presence of teachers and students physically in the classroom. Students can interact with teachers anytime and anywhere. The purpose of this activity provides training on E-learning along with learning tools, assisting E-learning utilization to MTs Walisongo and MA Walisongo Jember teachers. Training activities are E-learning, instructions for E-learning and applying E-learning media to one of the subjects. Through the above activities, teachers are able to develop learning equipment based on E-learning and improve ICT competencies. http://ijaers.com/detail/improving-teacher-competency-in-developing-learning-equipment-based-on-e-learning-through-metamorphosis-learning/ Titin Kartini, Mukhamad Zulianto, Ermita Rizki Albirri, Sri Wahyuni http://ijaers.com/uploads/issue_files/5-IJAERS-DEC-2018-37-ImprovingTeacherCompetency.pdf The project presented here brings results of images and the registration of producers in the municipality of Balsas in Maranhão, home to large grain explorers since from the field visits we can highlight that the predominant crops are soy, maize, sorghum and cotton in order of production, the municipality of Balsas stands out for mechanized agriculture For the 1 000 km² service of air mapping in the municipality of Balsas was divided into 10 zones of 100 km² and each area of 4 subplots of subdivide 25 km ² was divided so that there was a better combination for the images the main objective was to perform an aerial mapping in order to generate orthophotos that evaluate the conditions of land use in the municipality, together with field interviews for the verification of rural producers' licenses, in order to create a database in order to subsidize future civil works and determine the current land use. From the preliminaesr results were registered 27 large producers of these 18 already had or have some type of environmental licensing all issued through the State Department of Environment. The aerial mapping yielded a single georeferenced orthophoto GSD 15 cm where it is possible to analyze many parameters of land use. http://ijaers.com/detail/aerial-mapping-large-areas-replacing-extensive-measurements-and-research-of-field/ Denison Lima Correa, Jose Bruno Santos Pinheiro, Marcelo Augusto Machado Vasconcelos, Paulo Celso Santiago Bittencourt http://ijaers.com/uploads/issue_files/6-IJAERS-DEC-2018-39-AerialMapping.pdf This manuscript presents the results of an experimental research on the construction of virtual keyboards for the Internet of Things (IoT), using the NodeMCU12e controller in conjunction with the Nextion touchscreen display. The creation of projects for the Internet of Things is in constant development, applying technical and scientific models that meet the different types of solutions, in this way, the results of this experience are presented during the construction of a solution that serves parts of academic projects, contributing in this way as a research base for more complex projects, which require a solution with virtual keyboard for data entry, or even for the configuration of different types of devices, such as Arduino or Raspberry Pi controller. With the results obtained with this study, it was possible to make feasible the construction of a proposal that meets the needs of a small project, allowing to expand its possibilities and resources according to the need of the project to be developed. http://ijaers.com/detail/nodemcu12e-nextion-tft-an-experimental-survey-with-virtual-keyboard-in-iot-projects/ Antonio Carlos Bento, Anderson Rocha de Barros, Érica Oliveira Lopes da Silva, Leonardo Augusto Taniguti Mantovani http://ijaers.com/uploads/issue_files/7-IJAERS-JAN-2019-10-NodeMCU12e.pdf This research aimed to analyze the use of QR code in the packaging of agri-food products as a tool for communication and relationship between consumer and company, aiming to make the product and process traceable information available. In a specific way, the information considered relevant to the final consumer was identified under normal purchasing conditions. This research has an exploratory and descriptive character, and its data were collected with consumers in supermarkets located in two cities of Sao Paulo State: Marilia and Sao Carlos. The results showed that not all the information obtained in the tracking process is made available to final consumers and that the lack of knowledge about QR code is still considerable for consumers. In general, the consumers interviewed in Sao Carlos had higher income and higher education than those interviewed in Marilia, and these characteristics seemed to have resulted directly in the knowledge about the technology of the QR code, higher in Sao Carlos. The main contribution of this research is based on the survey of the information that the interviewed consumers consider important for the purchase decision of agri-food products, constituting an important reference so that the companies that currently work with traceability, be it industry or retail, can improve their labels, adding value to the marketed product. The study can be used as a starting point for other researches, testing new information and other products, making even possible comparisons. http://ijaers.com/detail/do-i-know-what-i-eat-the-use-of-qr-code-in-food-packaging-to-provide-traceability-information/ Joao Guilherme de Camargo Ferraz Machado, Jose Flávio Diniz Nantes, Fabiana Cunha Viana Leonelli http://ijaers.com/uploads/issue_files/8-IJAERS-JAN-2019-6-DoIknowwhatIeat.pdf This work proposal contributes to the advancement of the frontier of knowledge in the area of new information and communication technologies, where the object of this study helps to understand the particularities of cyberspace and cyberculture. The discovery of new technological resources produces theoretical and practical unfolding of new socio-technical elements in the knowledge age. To materialize this proposal, it was necessary to reflect deeply on information systems and database storage in light of the General Theory of Systems, revisiting its concepts and abstractions, converging to define open systems. Due to its generalist nature, adherence with the 3C model, for the development of collaborative systems, as well as its variables and technologies, have proved to be the cornerstones of framewok development to house a self-manageable news virtual environment (AVNA). Supported by the theoreticians who studied and established the primacy of consolidated terms and concepts, an innovative thesis was derived that establishes a synergy between techno-social elements, designing a system to host news production, considering new elements present in the context of a society each more connected and with new demands. Finally, all the theoretical conception architecture, software engineering and systems modeling techniques, have produced the genesis of vectors that added up in the development of a collaborative system, open and committed to meeting the technological and social demands of the producers and consumers of inserted news in cybercultural dromocracy. http://ijaers.com/detail/development-of-a-self-manageable-news-virtual-environment/ Fabio Machado de Oliveira, Carlos Henrique Medeiros de Souza, André Fernando Uébe Mansur, Bruna Moraes Marques, Fabrício Moraes de Almeida http://ijaers.com/uploads/issue_files/9-IJAERS-JAN-2019-2-Developmentof.pdf From the intensification of the use of various Information and Communication Technologies (ICTs), in different social contexts that touch postmodernity, contemporary dance has undergone some changes within the artistic scenario. With this, the interdisciplinary dialogue that the dance establishes with the technology becomes the target of academic studies and possible cultural practices in different approaches. Given this scenario, this research aims to investigate the possible and recent interdisciplinary practices between contemporary dance and technology under different scenes and different forms of artistic appropriation. The present article adopted the bibliographic research methodology and is configured in a qualitative nature investigation. Therefore, the periodicals published between the years of 2015 and 2017 were analyzed in the Scholar Google search system. The obtained results indicated an ephemeral number of researches that explore the following themes: contemporary dance, technologies, and interdisciplinary. In the analyzes of the studies, it was possible to verify that the artistic practices surpassed the corporal sense, being classified hybrids, from the point of view of a virtual body, indicating the notion of presence and the connection between the "being" and "being" in the world. http://ijaers.com/detail/information-and-communication-technologies-icts-dance-and-interdisciplinary-laconics-notes/ Priscilla Gonçalves de Azevedo, Larissa Salarolli Ruis, Cristiana Barcelos da Silva, Joane Marieli Pereira Caetano, Carlos Henrique Medeiros de Souza, Fabrício Moraes de Almeida http://ijaers.com/uploads/issue_files/10-IJAERS-JAN-2019-11-Informationand.pdf In this paper we extend a graph convolutional neural network (GCNNs) which is the one of the existing state-of-art deep learning methods using the notion of capsule networks for graph classification. Through experiments, we show that by extending GCNNs using capsule networks can significantly overcome the challenges of GCNNs for the task of graph classification. http://ijaers.com/detail/the-extension-of-graph-convolutional-neural-network-with-capsule-network-for-graph-classification/ Jean de DIEU TUGIRIMANA, Janvier RULINDA, Antoine NZARAMBA http://ijaers.com/uploads/issue_files/11-IJAERS-JAN-2019-9-TheExtension.pdf The Kafiri Strait has been is one of the most important human habitats in terms of topographical and environmental conditions in the southeastern province of Ilam. The present study was conducted to provide preliminary information for introducing and identifying a set of indicators from rock formations as a collection of warehouses and silos in the geographic region of the studied strait. Desirable spaces in this type of architecture are created by removing rocky masses through reducing their main bed, and they form that space with the material of the canvas. An example of these rocky warehouses in Kafari Strait is located on the margin of this strait with average height of 35-40 meters and the width of 500 meters, dominating about 1.5 kilometers in this geographical area. The research method was descriptive-analytic. The results of this study showed that the remnants left of these warehouses and their formation on the rocky bed of limestone, which had been affected by thousands of years due to the existence of seasonal sprawl and other natural factors, make this rock wall a hole with small, medium and large dimensions with various shapes and depths. The aboriginal inhabitants of these areas were able to use these materials to make changes to these holes, using them as structures in accordance with their needs as warehouses for storing supplies. Also, surveys carried out in the perimeter of these warehouses show remnants of mills that have been used to distort the water of the Kulmriver. The collection of reservoirs and water mills represents a clever and complete system of grains storehouses formed by the people of these areas; additionally, the results showed that the inhabitants of these areas could have mined, stored and used grains in these rocky warehouses. http://ijaers.com/detail/rocky-grains-storehouses-located-in-kafari-strait-on-the-banks-of-seimareh-river/ Lily Niakan http://ijaers.com/uploads/issue_files/12-IJAERS-JAN-2019-20-RockyGrains.pdf This paper try to construct an intelligent security system based on face recognition. The data used in this research are frontal face images and without obstacles, and facial images with obstacles. In this research, we used Content Based Image Retrieval or CBIR method. Approximately 10,000 images used in this work which is collected from internet, police department office, and shooting directly as primary data. Facial image data are stored in the database object-based files through process of identification and facial recognition. Consequently, facial images are retrieved using facial similarity techniques. In this stage of identification , an application can specify shape of the front face, performs feature extraction, and running intelligent Similarity (matching face data) which open the door automatically . This system can be used to minimize the occurrence of criminality occurs nowadays. This system can be used such as for house door security, office doors, and airport gates. The experiments result show that our algorithm quite good in face detection and recognition to open the door. http://ijaers.com/detail/face-recognition-using-content-based-image-retrieval-for-intelligent-security/ Sri Karnila, Suhendro Irianto, Rio Kurniawan http://ijaers.com/uploads/issue_files/13-IJAERS-JAN-2019-7-FaceRecognition.pdf Objective: To analyze the concentration of N nitrate (NO3 -) in the urban groundwater of Nova Mamoré on the Brazil / Bolivia border. Method: Data were collected from 40 water samples according to Standard Methods for the Examination for Water and Wasterwater along with the methodology proposed in the Water Sample Collection and Preservation Guide of the Environmental Sanitation Technology Company (CETESB). The sites were georeferenced using the Global Positioning System (GPS). For nitrate measurement, the spectrophotometry method was used, using Spectrophotometer, brand Micronal B495. The chemical reagents used were manufactured by Alfatecnoquímica and made available in two vials called reagents 1 and 2 (nitrate reagent). Results: The urban groundwater used by the population of Nova Mamoré for human consumption and other utilities is impacted by high levels of N nitrate (NO3-). Seventy - three percent (73%) of the sample presents levels> 10 mg/L of nitrate. These sites constitute urban areas of high environmental risk to human health, a public health issue. Only 17% presented levels http://ijaers.com/detail/nitrate-concentration-no3-in-groundwater-of-the-urban-area-of-nova-mamor-rond-nia-in-the-brazil-bolivia-border/ Vitor Akira Uesugui Costa, Carlos Alberto Paraguassú-Chaves, Luciana Rezende Alves de Oliveira, Edilson Carlos Caritá, Charlles da Silva Barata, Fabrício Moraes de Almeida, Lenita Rodrigues Moreira Dantas, Izan Fabrício Neves Calderaro, Leonardo Severo da Luz Neto http://ijaers.com/uploads/issue_files/14-IJAERS-JAN-2019-4-NitrateConcentration.pdf Steganography is a method for inserting digital data within a different digital medium like text, pictures, sound signals, or film signals, while not exposing its occurrence in the medium. Information safekeeping is an essential necessary domain in correspondence medium over the web system. In this paper, working for improve the performance of Image Steganography. Results are showing comparison in between DCT-SVD and LWT-DCT-SVD. PSNR of proposed methodology is high as compare to DCT-SVD. http://ijaers.com/detail/high-psnr-based-image-steganography/ Namrata Singh http://ijaers.com/uploads/issue_files/15-IJAERS-JAN-2019-14-HighPSNR.pdf In this research, breaker equations were developed to conduct breaker height, breaker depth and breaker length calculations. Wave number conservation equation and mass/energy conservation equation are extracted from velocity potential equation to be used in the formulation of breaker equations. Breaker depth equation is obtained from wave number conservation equation, breaker steepness equation is obtained from kinematic free surface boundary condition and using energy conservation equation of linear wave theory, relation between breaker height and breaker depth is obtained. http://ijaers.com/detail/complete-breaker-analysis-using-velocity-potential-of-linear-wave-theory/ Syawaluddin Hutahaean http://ijaers.com/uploads/issue_files/16-IJAERS-JAN-2019-19-CompleteBreaker.pdf There is a consensus that cooperative communication is a key technology for the upcoming generations of mobile communications. Whether under the Coordinated Multipoint (CoMP), Device-to-Device (D2D) communication or Internet of Things (IoT) scopes, there is little doubt that a more decentralized network, where several communicating agents smartly cooperate to improve data rate and reliability, is fundamental to cope with the always scarce resources of energy and bandwidth. When relaying stations are deployed to increase signal coverage and to provide cooperative diversity, the concatenation of two or more point-to-point MIMO channels impose a restriction on conventional algorithms for channel estimation. Although single-relay, two-hop Amplify-and-Forward (AF) systems have been reasonably investigated, there are enough evidences that more transmission hops will be a common scenario in the next years. This work proposes a semi-blind receiver for the task of joint symbol and channel estimation in a three-hop AF MIMO system. Resorting to a Nested PARAFAC tensor model, new estimating equations were derived, along studies on the uniqueness and identifiability conditions concerning the aforementioned receiver. Simulations corroborate the validity of the receiver as an effective option. http://ijaers.com/detail/on-the-joint-symbol-and-channel-estimation-for-three-hop-mimo-relaying-links/ Leandro R. Ximenes http://ijaers.com/uploads/issue_files/17-IJAERS-JAN-2019-18-OntheJointSymbol.pdf The construction sector provides occupational risks to construction workers at the building site. Despite the obligation of the use Individual Protection Equipment (IPE), the noise is one of the occupational risks, which persist as one of the most injury to workers. The causes may be inherent in the control, but also the inappropriate choice of the methods of implantation of hearing protectors as an individual control measure. This paper aims to analyze the efficiency of hearing protectors, taking into account the octave band spectrum at the sound pressure levels of the main equipment used in the civil construction sector in the city of Manaus in Brazil, following the limits defined in the Brazilian standard. http://ijaers.com/detail/analysis-of-the-efficiency-of-auditory-protectors-used-in-the-civil-construction-industry-in-the-city-of-manaus-in-brazil/ Francisco Carlos Tavares Amorim, Edinaldo Jose de Sousa Cunha, David Barbosa de Alencar, Jorge de Almeida Brito Júnior, Manoel Henrique Reis Nascimento,Carlos Alberto Oliveira de Freitas http://ijaers.com/uploads/issue_files/18-IJAERS-JAN-2019-21-Analysisof.pdf The aim is to examine the relations between solidarity economy and creative economy, as well as social technology and the principles for incubation in solidarity economy and creative economy in Brazil. The main argument indicates that one of the main linkages between solidarity economy and creative economy comes from the stimulus both economies can give to the idea of “social technology”, which disseminated the concern with the technological bases of a process that would enable the recovery of the citizenship of the most penalized segments, the interruption of the trajectory of social fragmentation and internal economic strangulation of the country and the construction of sustainable development. The incubation of solidarity-based and creative enterprises can be seen asa process connected to social technology, since the development of science and technology can be associated with workers. It can also bring opportunities for pedagogical acts of formation and knowledge building through the practical and educational process of organization of these enterprises and be a university’s extension practice, which expresses the bond of the academic community with society. The incubation of solidarity-based and creative enterprises can also be a part of development strategies for impoverished territories. However, it faces constraints, such as lack of resources and personnel. http://ijaers.com/detail/social-technology-and-incubation-in-solidarity-economy-and-creative-economy-in-brazil/ Diego Santos Vieira de Jesus, Henrique de Oliveira Santos Vieira de Jesus http://ijaers.com/uploads/issue_files/19-IJAERS-JAN-2019-30-SocialTechnology.pdf Ashes from the burning of fuel oils containing mixtures of vanadium, sodium, sulfur and chloride compounds in the form of molten salts or oxides can cause hot corrosion of the carbon steel tubes located in the furnace at high temperatures with extremely disastrous effects. In order to simulate the melting ash in the laboratory, mixtures of sodium sulfate and vanadium pentoxide were used in different proportions of Na2O and V2O5 at temperatures of 500°C, 700°C and 800°C and in the exposure time of 12h, 24h and 36h using carbon steel coupons in the form of half-cane. The results were evaluated morphologically for the depth of the corrosive attack and the loss of mass using a confocal microscope where it was possible to evaluate the degree of corrosion caused by the action of the vanadate fluxes (Na2O.V2O5).The deepest pitting occurred in the ratio 2Na2O.V2O5 at the three test temperatures. At the temperature of 800°C and in the time of 36 hours, the average thickness loss in the coupons was 11%. http://ijaers.com/detail/hot-corrosion-evaluation-of-carbon-steel-caused-by-mixtures-of-vanadium-oxide-and-sodium-sulfate-simulating-ashes-of-fuel-oils/ Fernando B. Mainier, Alexandre Santos de Oliveira http://ijaers.com/uploads/issue_files/20-IJAERS-JAN-2019-27-HotcorrosionEvaluation.pdf The purpose of this study is to evaluate the main variables influencing the employability of young undergraduates alumni. The research comprehended the study of a database of 9753 young people, containing information on work styles, personal values, behavioral profile, logic level, proficiency in foreign languages, and also professional and extracurricular experiences. The analysis of this database shows is possible to identify the main variables adopted by organizations, as well as their relevance along the stages of the selection process. After such identification, a comparison was made between the profile of the successful candidates in a determined selection process and the students of the Chemical Engineering undergraduate course hosted by the Universidade Federal de Viçosa. http://ijaers.com/detail/analysis-of-the-factors-influencing-the-employability-of-recent-undergraduates/ Juan Enrique Mares Ribeiro, Antonio Marcos de Oliveira Siqueira, Wagner dos Reis Marques Araújo, Gabriel Siqueira Silva http://ijaers.com/uploads/issue_files/21-IJAERS-JAN-2019-24-Analysisofthe.pdf Several studies show that to the extent that the teacher knows the learning preferences of his students is able to promote quality in the teaching-learning process. However, the teacher must know and identify his own style of teaching. The aim of this study is to verify and analyze the diversity of teaching styles in a Brazilian federal public university, based on a widely known teaching model. The method of investigation used in this theoretical-empirical study is the quantitative, through the application of forms and statistical study of the data obtained, using the tool SPSS Statistics. It was observed that the Styles of Open Education and Functional Education are the most commonly found among the professors at the university analyzed. It can be observed that for a level of significance equal to 5%, the teaching styles do not vary significantly with the gender of the teacher, with his academic formation, with the time of activity in the university, that is, the styles presented independent of these factors. The results are different from those obtained in other studies, confirming that the educational environment, the strategies involved and the content of the subjects affect the teaching styles and what justifies the need for further investigation. http://ijaers.com/detail/a-preliminary-investigation-on-teaching-styles-in-higher-education/ Antonio Marcos de Oliveira Siqueira, Soraia Aparecida Monteiro, Wagner dos Reis Marques Araújo, Gabriel Siqueira Silva, Aldair Oliveira de Andrade http://ijaers.com/uploads/issue_files/22-IJAERS-JAN-2019-26-Apreliminary.pdf The Royal Swedish Academy of Sciences awarded the Nobel Prize in Physics in 2018 to three scientists, Arthur Ashkin of Bell Laboratories, Holmdel, USA, Gérard Mourou of the École Polytechnique, Palaiseau, France, and University of Michigan, Ann Arbor, USA, and Donna Strickland of the University of Waterloo, Canada. Inventions that were distinguished with the award revolutionized laser physics. Extremely small objects and incredibly fast processes are now being seen by the incidence of light. These advanced and accurate instruments are opening up areas of research yet to be explored and can be used in many industrial and medical applications. http://ijaers.com/detail/the-optical-tweezers-and-the-nobel-prize-in-physics/ Celso Luis Levada, Huemerson Maceti, Miriam Magalhães O.Levada, Ivan José Lautenschleguer http://ijaers.com/uploads/issue_files/23-IJAERS-JAN-2019-28-TheOptical.pdf With the availability and affordability of computers and communication technology devices worldwide, teaching no longer centers around teachers. Students become autonomous learners, taking the ownership of learning where they no longer rely fully on teachers as the learning resources. This paves innovative intervention towards engaging the learners cognitively using Web 2.0 tools. Web 2.0 tools offer learners to engage in higher order thinking skills involving not just to understand and apply but also to analyze, evaluate and create through two-way communications and collaborations. Due to the pedagogical potentials of Web 2.0 tools, this study attempts to investigate how the students involve Web 2.0 tools in supporting classroom learning. This study employed a questionnaire survey among students at a Higher Learning Institution involving 100 samples. This is a preliminary study prior to the final study involving bigger populations from different universities. Interviews were also carried out among three students to gain in-depth understanding of learning that enables the researcher to derive a conceptual model. The related main ideas from each interviewee were gathered to get commonality of themes. And finally, main themes were generated. A systematic data analysis was done based on developing themes in an inductive way as directed by the content of data. The findings reveal that the majority of students use Web 2.0 tools for finding resources, communication and for both low and higher order thinking skills. Further findings show that Academic readiness contributed significantly on students cognitive engagement while Use of Web 2.0 tools did not contribute significantly. Implications of the study address the theoretical and practical aspects. http://ijaers.com/detail/investigating-web-2-0-tools-use-and-students-cognitive-engagement-in-selected-tanzanian-higher-institutions-preparing-towards-21st-learning/ Issa Omar Malecela, Dr. Sharifah Sariah Syed Hassan http://ijaers.com/uploads/issue_files/24-IJAERS-JAN-2019-12-InvestigatingWeb.pdf Brazil has one of the biggest biodiversity of fruits of the world, with great potential to agricultural business. Among the fruits with agronomic potential the Spondias are evidenced by its characteristics of differentiated colors and flavors, besides being considered food rich in phytochemical compounds. This study aimed to evaluate the physicochemical characterization and bioactive compounds of Spondias fruit. The Cajá fruits, umbu-cajá, cajarana and seriguela were acquired in the local market of Campina Grande, PB. The fruits were selected, washed, sanitized and analyzed in the Food Engineering laboratory from the Federal University of Campina Grande. The analyzes performed were: water content, pH, soluble solids, ashes, redactor sugar, luminosity, yellow intensity, red intensity, water activity, anthocyanins, flavonoids and ascorbic acid. The bioactive compounds were extracted from the pulp in natura, using maceration with ethanol in the proportion of 1:10. The determination of the anthocyanins and flavonoids was based on the Francis (1982) method and the ascorbic acid according to Benassi e Antunes (1988). For the water content were found, pH, total soluble solids, ashes, redactor sugar, luminosity, yellow intensity, red intensity, aw, anthocyanins, flavonoids and ascorbic acid from cajá (87.56%, 1.99, 10.5 ºBrix, 0.79%, 4.00%, 55.45, 72.25, 15.78, 0.98, 0.15 mg.100g, 2.86 mg.100g and 36.75 mg.100g), umbu-cajá (90.43%, 1.50, 8.2 ºBrix, 0.28%, 2.46%, 47.35, 48.12, 4.05, 0.99, 0.28 mg.100g, 2.27 mg.100g and 15.83 mg.100g), cajarana (90.54%, 2.10, 8.5 ºBrix, 0.62%, 3.46%, 46.86, 77.54, 10.19, 0.14mg.100g, 3.13 mg.100g e 24.39 mg.100g) and seriguela (80.13%, 2.13, 17ºBrix, 0.63%, 3.75%, 55.77, 64.00, 8.79, 0.98, 3.45 mg.100g, 2.55 mg.100g and 22.67 mg.100g). The varieties of Spondias present reasonable values of soluble solids, pH, flavonoids, and ascorbic acid, characterizing itself as raw material with great potential to its commercial utilization which satisfies the market’s current expectations. http://ijaers.com/detail/comparative-study-of-fruit-bioactivity-of-spondias/ Francinalva Cordeiro de Sousa, Luzia Marcia de Melo Silva, Inácia dos Santos Moreira, Deise Souza de Castro, Danielle dos Santos Tavares Pereira, Angela Matilde da Silva Alves http://ijaers.com/uploads/issue_files/25-IJAERS-JAN-2019-29-Comparativestudy.pdf