scholarly journals Alarma inteligente para prevenir el robo de bicicletas en la Ciudad de Oaxaca

2020 ◽  
pp. 1-12
Author(s):  
Maricela Morales-Hernández ◽  
Alejandra Jiménez-Rocha ◽  
Anayansi Cristina Hernandez-Abrego ◽  
Clara Aurora Sánchez-Diaz
Keyword(s):  
Development Methodology ◽  
Applied Development ◽  
Two Phases ◽  
Day By Day

The objective of this article is to present the development of a smart alarm prototype that will help prevent bicycle theft in Oaxaca City, which is based on a programmable system. The project arises as a need for protection and safety of the bicycle as a means of transportation; since the thefts of bicycles parked on streets in Oaxaca City increase day by day. As, for example, Carrera (2018) notes that the responsible authority does not have a decisive participation in the abatement of bicycle thefts and that it is the citizens who seek them out by their own means and they not always get success. The research was carried out in two phases, in this document the first phase is presented, in which two functional prototypes of the smart alarm were designed and implemented. The applied development methodology is that of prototypes; since this facilitates the understanding of the needs of the users. With the present research, it is hoped to lay the foundations to continue with the improvement of the prototype and in this way, society will be offered an option to protect its heritage.

Systems Development Methodology for Mobile Commerce Applications

2012 ◽  
pp. 146-162
Author(s):  
Muazzan Binsaleh ◽  
Shahizan Hassan
Keyword(s):  
Research Methodology ◽  
Design Research ◽  
System Development ◽  
Systems Development ◽  
Mobile Commerce ◽  
Agile Methodologies ◽  
Development Methodology ◽  
Development Evaluation ◽  
Two Phases ◽  
Current Systems

There are several methodologies, including traditional and agile methodologies, being utilized in current systems development. However, it could be argued that existing development methodologies may not be suitable for mobile commerce applications, as these applications are utilized in different contexts from fixed e-commerce applications. This study proposes a system development methodology for mobile commerce applications. In order to achieve this aim, four objectives are proposed: investigating existing systems development methodologies used to develop mobile commence applications, identifying strengths and weaknesses of existing development methodologies, construction of a suitable methodology for mobile commerce applications, and testing for its applicability and practicality. The research methodology used in the study is the design research, which includes the steps of awareness of problems, suggestion, development, evaluation and conclusion. However, this paper only focuses on the first two phases of the whole study, which are awareness of the problem and making suggestions, while the evaluation and conclusion will be conducted as future works.

Systems Development Methodology for Mobile Commerce Applications

2011 ◽  
Vol 3 (4) ◽  
pp. 36-52
Author(s):  
Muazzan Binsaleh ◽  
Shahizan Hassan
Keyword(s):  
Research Methodology ◽  
Design Research ◽  
System Development ◽  
Systems Development ◽  
Mobile Commerce ◽  
Agile Methodologies ◽  
Development Methodology ◽  
Development Evaluation ◽  
Two Phases ◽  
Current Systems

There are several methodologies, including traditional and agile methodologies, being utilized in current systems development. However, it could be argued that existing development methodologies may not be suitable for mobile commerce applications, as these applications are utilized in different contexts from fixed e-commerce applications. This study proposes a system development methodology for mobile commerce applications. In order to achieve this aim, four objectives are proposed: investigating existing systems development methodologies used to develop mobile commence applications, identifying strengths and weaknesses of existing development methodologies, construction of a suitable methodology for mobile commerce applications, and testing for its applicability and practicality. The research methodology used in the study is the design research, which includes the steps of awareness of problems, suggestion, development, evaluation and conclusion. However, this paper only focuses on the first two phases of the whole study, which are awareness of the problem and making suggestions, while the evaluation and conclusion will be conducted as future works.

scholarly journals Desarrollo de una herramienta de software sistema administración de órdenes e inventario (SAO-DiTOTINOS) para restauran DiTOTINOS

2019 ◽  
pp. 23-28
Author(s):  
Efrén VEGA-CHÁVEZ ◽  
Luis Germán GUTIÉRREZ-TORRES ◽  
Fernando José MARTÍNEZ-LÓPEZ
Keyword(s):  
Phase I ◽  
Phase Ii ◽  
Software Tool ◽  
Software Tools ◽  
The State ◽  
Face To Face ◽  
System Administration ◽  
Development Methodology ◽  
The Face ◽  
Two Phases

The present describes the results of the first two phases of the investigation that were proposed in order to provide a solution to the DiTotinos restaurant located in the municipality of Moroleón in the state of Guanajuato. The main problem to be treated is the way in which the activity of reporting products available in the warehouse was carried out, as well as following up on the face-to-face and / or telephone orders, which were registered manually, which is why the development of the software tool System Administration of Orders and Inventory DiTOTINOS (SAO-DiTOTINOS) was suggested. This software will have the function of controlling the entries and exits of the products of the inventory and administer the orders, for which the following methodology was applied: phase I, Development of software tools (using sequential linear development methodology), phase II, Implement the software tool. With this, the direct beneficiary is the restaurant company DiTotinos, mainly the order and inventory area.

Augmented reality for the treatment of arachnophobia: exposure therapy

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Julio Ore ◽  
Alex Pacheco ◽  
Edwin Roque ◽  
Andy Reyes ◽  
Liz Pacheco
Keyword(s):  
Augmented Reality ◽  
Mobile Application ◽  
Exposure Therapy ◽  
Point Of View ◽  
Functional Requirements ◽  
Application Development ◽  
Content Type ◽  
Development Methodology ◽  
Specific Object ◽  
Two Phases

Purpose People who suffer from phobias try to avoid a specific object or feared situation by creating a great obstacle that causes serious consequences in their daily life; the most effective way to deal with a phobia is through exposure therapy, which according to one of the most important principles of psychology states that to overcome a fear you have to face it. The purpose of this paper is to develop a mobile application based on augmented reality (AR) for the treatment of spider phobia (Araneae). Design/methodology/approach The application development methodology was divided into two phases: design where sketches were made according to functional requirements, and the client server model was used for user queries and the development phase where the modules for the information of the phobia; and visualization of the arachnid in different morphological forms was implemented through the development tools. Findings The findings of this study, in this sense, state that it was possible to overcome the phobia in an essential way by ceasing to perceive harmless things as dangerous, helping them to manage stress and keep them under control. Originality/value Allowing to face their fears in support of existing therapeutic processes through images with progressively AR, being an innovative and accessible treatment from an economic, technological and professional point of view.

scholarly journals Theory development methodology process: Transformational leadership model for academic nurse leaders in South Africa

2020 ◽  
Vol 11 (2) ◽  
pp. 37
Author(s):  
Sipho Wellington Mkhize
Keyword(s):  
Transformational Leadership ◽  
Nursing Education ◽  
Quantitative Research ◽  
Model Development ◽  
Theory Development ◽  
Nurse Leaders ◽  
Leadership Model ◽  
Development Methodology ◽  
Education Leaders ◽  
Two Phases

Objective: The purpose of the article was to develop a transformational leadership model for academic nurse leaders in the nursing education institutions through theory development methodology process. This study emanated from objectives that were set into two phases whereby phase one formulated to enable the identification and classification of concepts in relation to transformational leadership of academic nurse leaders and phase two to develop and describe a model for transformational leadership for nursing education leaders in the Nursing Education Institutions.Methods: An overarching theory generative design was adopted, in qualitative, quantitative, exploratory, descriptive and contextual nature. The theory generative design provided an understanding of the phenomenon of transformational leadership model development for academic nurse leaders in nursing education institutions. The research methods followed the strategy of theory development using concept, identification and classification, data collection methods and procedures, data analysis methods and processes to ensure the trustworthiness of the study, concept description and critical reflection of the model. The study was conducted at nursing education institutions from four Provinces of South Africa, namely, Gauteng, KwaZulu Natal, Free State, and Northwest.Results: A visual structure was constructed after main and associated concepts were identified to give the researcher a diagram that relates to the process and structure for the incorporation of academic nurse leaders. The structure of the model was developed and gave an account of the content conceptually classified. There were four structural forms, which to convey hierarchical relations, differentiation, overlapping areas, and polarity and continuity. The structured model formed the conceptual relationships within the model and thereafter, emerged from relationships within the model, which included central elements of the model and consists of concepts, statements and relationships between concepts. The concepts addressed were agent (transformational leadership), recipient (followers), context (nursing education institution), procedure (transformational leadership), terminus/goal (empowerment) and dynamic (collaboration and partnership).Conclusions: This article described the research design and method employed to develop a model for transformational leadership for nursing education leaders. A theory development, descriptive, exploratory, contextual, qualitative and quantitative research design in nature was described. The research objectives were formulated in two phases to enable exploration, identification, and definition of concepts (phase 1) and for model development (phase 2). Data collected though individual interviews for college principals and focus group interviews for vice-principals and subject heads and questionnaires for lecturers, students and administrative staff. Information regarding the sample size and number of participants the data collection method was discussed. The instrument used in this research including its reliability and validity, discussed in detail. Finally, the data analysis of qualitative and quantitative research methodology was highlighted.

scholarly journals 433. Mathematical Modeling of COVID-19 Transmission by a k Phases SEIR Model

2020 ◽  
Vol 7 (Supplement_1) ◽  
pp. S283-S285
Author(s):  
Braulio Roberto Gonçalves Marinho Couto ◽  
Carlos Ernesto Ferreira Starling
Keyword(s):  
Mathematical Modeling ◽  
Numerical Method ◽  
Case Fatality ◽  
Model Error ◽  
Infectious Period ◽  
Seir Model ◽  
Two Phases ◽  
Range Of Values ◽  
Day By Day ◽  
Three Phases

Abstract Background Mathematical models can provide insights on the spread of infectious diseases, such as the novel SARS-CoV-2 (COVID-19). This work applied a SEIR epidemiological compartmental model (susceptible-exposed-infected-recovered) with k phases to predict the actual spread of the COVID-19 virus. Fig. 1 – SEIR model for COVID-19. Methods Four parameters of the SEIR model were obtained by international experiences: the incubation period = 3.7 in days, the proportion of critical cases = 0.05, the overall case-fatality rate = 0.023, and the asymptomatic proportion of COVID-19 = 0.18. The critical step in the prediction of COVID-19 by the model is the value of R0 (the basic reproduction number) and T_infectious (the infectious period, in days). R0 and T_infectious for each phase of the curve are calculated by mathematical constrained optimization, a numerical method. Differently from a statistical modelling, a numerical method is a type of mathematical modelling that is not dependent on a probability distribution. The objective function that measures the model error is minimized with respect to R0 and T_infectious in the presence of constraints on those variables. For R0, constraints are valid range of values (0.5 ≤ R0 ≤ 20). For T_infectious, constraints also are related to its range of values (2 ≤ T_infectious ≤ 14). A Solver from Excel or NEOS Server, for example, can be used for finding numerically minimum of a function Z, that represents the sum of absolute value of errors between COVID-19 new cases observed in one day, and COVID-19 cases predicted by the SEIR model (Fig. 2 and 3). Fig. 2 - Mathematical Modeling of COVID-19 transmission by a SEIR model wiht three phases. Fig.3 - Algorithm for the SEIR model applied to COVID-19 (calculation of new COVID-19 cases day-by-day). Results The ECDC has registered 8,142,129 COVID-19 in the world on Jun/17/2020. R0 and T_infectious calculated for a three phases curve in USA, with a stabilized scenario (Fig. 4: R0_1=1.0; T_infectious_1=2; R0_2=17.4; T_infectious_2=2; R0_3=1.0; T_infectious_3=14), a two phases curve in Brazil (Fig. 5: R0_1=8.0; T_infectious_1=9; R0_2=1.3; T_infectious_2=6), and a three phases model for France (Fig. 6: R0_1=4.3; T_infectious_1=11; R0_2=9.3; T_infectious_2=11; R0_3=0.5; T_infectious_3=12). Fig. 4 - Three phases SEIR models for R0 and T_infectious that minimize the model error in predicting new COVID-19 cases day-by-day in USA. Fig. 5 - Two phases SEIR models for R0 and T_infectious that minimize the model error in predicting new COVID-19 cases day-by-day in USA. Fig. 6 - Two phases SEIR models for R0 and T_infectious that minimize the model error in predicting new COVID-19 cases day-by-day in USA. Conclusion The k phases SEIR model proved to be a useful to measure the COVID-19 transmission in a City, State or Country. More phases can be applied to fit a scenario with a new second COVID wave. Disclosures All Authors: No reported disclosures

Precipitation of NiHfsi phase in NiAl single crystals containing Hf

1995 ◽  
Vol 53 ◽  
pp. 532-533
Author(s):  
A. Garg ◽  
R. D. Noebe ◽  
R. Darolia
Keyword(s):  
High Temperature ◽  
Single Crystals ◽  
High Temperature Strength ◽  
Bridgman Technique ◽  
Shell Mold ◽  
Third Phase ◽  
Unknown Phase ◽  
Transmission Electron ◽  
Two Phases ◽  
Nial Matrix

Small additions of Hf to NiAl produce a significant increase in the high-temperature strength of single crystals. Hf has a very limited solubility in NiAl and in the presence of Si, results in a high density of G-phase (Ni16Hf6Si7) cuboidal precipitates and some G-platelets in a NiAl matrix. These precipitates have a F.C.C structure and nucleate on {100}NiAl planes with almost perfect coherency and a cube-on-cube orientation-relationship (O.R.). However, G-phase is metastable and after prolonged aging at high temperature dissolves at the expense of a more stable Heusler (β'-Ni2AlHf) phase. In addition to these two phases, a third phase was shown to be present in a NiAl-0.3at. % Hf alloy, but was not previously identified (Fig. 4 of ref. 2 ). In this work, we report the morphology, crystal-structure, O.R., and stability of this unknown phase, which were determined using conventional and analytical transmission electron microscopy (TEM).Single crystals of NiAl containing 0.5at. % Hf were grown by a Bridgman technique. Chemical analysis indicated that these crystals also contained Si, which was not an intentional alloying addition but was picked up from the shell mold during directional solidification.

Imaging of Al-Li-Cu alloys with a Scanning Ion Microprobe

1990 ◽  
Vol 48 (2) ◽  
pp. 314-315
Author(s):  
K.K. Soni ◽  
D.B. Williams ◽  
J.M. Chabala ◽  
R. Levi-Setti ◽  
D.E. Newbury
Keyword(s):  
Mass Spectrometry ◽  
Secondary Ion Mass Spectrometry ◽  
Equilibrium Phase ◽  
Icosahedral Symmetry ◽  
Ion Microprobe ◽  
X Ray ◽  
Cu Alloys ◽  
Two Phases ◽  
The University ◽  
Secondary Ion

In contrast to the inability of x-ray microanalysis to detect Li, secondary ion mass spectrometry (SIMS) generates a very strong Li+ signal. The latter’s potential was recently exploited by Williams et al. in the study of binary Al-Li alloys. The present study of Al-Li-Cu was done using the high resolution scanning ion microprobe (SIM) at the University of Chicago (UC). The UC SIM employs a 40 keV, ∼70 nm diameter Ga+ probe extracted from a liquid Ga source, which is scanned over areas smaller than 160×160 μm2 using a 512×512 raster. During this experiment, the sample was held at 2 × 10-8 torr.In the Al-Li-Cu system, two phases of major importance are T1 and T2, with nominal compositions of Al2LiCu and Al6Li3Cu respectively. In commercial alloys, T1 develops a plate-like structure with a thickness <∼2 nm and is therefore inaccessible to conventional microanalytical techniques. T2 is the equilibrium phase with apparent icosahedral symmetry and its presence is undesirable in industrial alloys.

Defect structures of Nb1+αS2 sulfidation scales

1992 ◽  
Vol 50 (1) ◽  
pp. 38-39
Author(s):  
Chuxin Zhou ◽  
L. W. Hobbs
Keyword(s):  
Stacking Faults ◽  
Rhombohedral Structure ◽  
Stacking Sequence ◽  
Defect Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plane Normal ◽  
Lower Case ◽  
Sulfur Layer ◽  
Two Phases

One of the major purposes in the present work is to study the high temperature sulfidation properties of Nb in severe sulfidizing environments. Kinetically, the sulfidation rate of Nb is satisfactorily slow, but the microstructures and non-stoichiometry of Nb1+αS2 challenge conventional oxidation/sulfidation theory and defect models of non-stoichiometric compounds. This challenge reflects our limited knowledge of the dependence of kinetics and atomic migration processes in solid state materials on their defect structures.Figure 1 shows a high resolution image of a platelet from the middle portion of the Nb1+αS2 scale. A thin lamellar heterogeneity (about 5nm) is observed. From X-ray diffraction results, we have shown that Nb1+αS2 scale is principally rhombohedral structure, but 2H-NbS2 can result locally due to stacking faults, because the only difference between these 2H and 3R phases is variation in the stacking sequence along the c axis. Following an ABC notation, we use capital letters A, B and C to represent the sulfur layer, and lower case letters a, b and c to refer to Nb layers. For example, the stacking sequence of 2H phase is AbACbCA, which is a ∼12Å period along the c axis; the stacking sequence of 3R phase is AbABcBCaCA to form an ∼18Å period along the c axis. Intergrowth of these two phases can take place at stacking faults or by a shear in the basal plane normal to the c axis.

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