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1
artículo
Publicado 2017
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The goal of the present work is to study some properties and applications of the Gamma Function, denoted by Γ. Initially, we use the Lebesgue Integral Theory in order to prove that the improper integral given by Γ is convergent. We describe the extended domain property of Γ, and we also deduce some elementary properties. We present two different ways of proving that B(x, y) = Γ(x)Γ(y)/Γ(x+y) , where B is the Beta Function. Finally, we include some applications of the Gamma Function, between them some serve up as tools on Reliability Engineering.
2
artículo
Publicado 2017
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The goal of the present work is to study some properties and applications of the Gamma Function, denoted by Γ. Initially, we use the Lebesgue Integral Theory in order to prove that the improper integral given by Γ is convergent. We describe the extended domain property of Γ, and we also deduce some elementary properties. We present two different ways of proving that B(x, y) = Γ(x)Γ(y)/Γ(x+y) , where B is the Beta Function. Finally, we include some applications of the Gamma Function, between them some serve up as tools on Reliability Engineering.
3
artículo
Publicado 2020
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The aim of this research was to investigate the psychometric properties of the Interpersonal Behaviors Questionnaire in Sport adapted to Peru. Based on Self-Determination Theory, this questionnaire assess the perception of interpersonal behaviors that support or thwart the basic psychological needs of athletes (autonomy, competence, relatedness) by their coaches. 228 university athletes (Mage = 21.24; SD = 2.39) of both sexes participated in the study. The results of the confirmatory factor analyzes showed that a six-factor model obtained good fit index and adequate reliability. Correlational analyzes with variables: life satisfaction, positive and negative affect, satisfaction and frustration of basic psychological needs, and burnout showed satisfactory evidence of convergent and discriminant validity. Thus, it was concluded that the IBQD could be used in the university sports Peruvian ...
4
artículo
Publicado 2021
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The aim of this research was to investigate the psychometric properties of the Interpersonal Behaviors Questionnaire in Sport adapted to Peru. Based on Self-Determination Theory, this questionnaire assess the perception of interpersonal behaviors that support or thwart the basic psychological needs of athletes (autonomy, competence, relatedness) by their coaches. 228 university athletes (Mage = 21.24; SD = 2.39) of both sexes participated in the study. The results of the confirmatory factor analyzes showed that a six-factor model obtained good fit index and adequate reliability. Correlational analyzes with variables: life satisfaction, positive and negative affect, satisfaction and frustration of basic psychological needs, and burnout showed satisfactory evidence of convergent and discriminant validity. Thus, it was concluded that the IBQD could be used in the university sports Peruvian ...
5
artículo
Publicado 2021
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The aim of this research was to investigate the psychometric properties of the Interpersonal Behaviors Questionnaire in Sport adapted to Peru. Based on Self-Determination Theory, this questionnaire assess the perception of interpersonal behaviors that support or thwart the basic psychological needs of athletes (autonomy, competence, relatedness) by their coaches. 228 university athletes (Mage = 21.24; SD = 2.39) of both sexes participated in the study. The results of the confirmatory factor analyzes showed that a six-factor model obtained good fit index and adequate reliability. Correlational analyzes with variables: life satisfaction, positive and negative affect, satisfaction and frustration of basic psychological needs, and burnout showed satisfactory evidence of convergent and discriminant validity. Thus, it was concluded that the IBQD could be used in the university sports Peruvian ...
6
artículo
Publicado 2010
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The optimal selection of orthodontic archwires allows the professional to make the treatment in an efficient way; therefore, the knowledge of basic mechanical properties is required, which are not revealed by their manufacturers. The purpose of this study was to compare the mechanical properties (constant tension in the activation area, constant elongation in the activation area, maximum resistance and break point) of three thermo-activated titanium-nickel orthodontic archwires. 10 0.4 mm-diameter thermo-activated titaniumnickel orthodontic archwires from the following brands were used: NiTi GACR (Control Group), Nitinol Termoactivado 3M UnitekR, Sentalloy GACR, Nitinol Termoactivado TECNIDENTR. 80 mm test bodies were prepared and tested for traction using a Zwick / Roell machine model Z050 8402 with a 50 kN capacity, at a speed of 1 mm/min and at 37 °C. The results show that the higher...
7
artículo
Publicado 2010
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The optimal selection of orthodontic archwires allows the professional to make the treatment in an efficient way; therefore, the knowledge of basic mechanical properties is required, which are not revealed by their manufacturers. The purpose of this study was to compare the mechanical properties (constant tension in the activation area, constant elongation in the activation area, maximum resistance and break point) of three thermo-activated titanium-nickel orthodontic archwires. 10 0.4 mm-diameter thermo-activated titaniumnickel orthodontic archwires from the following brands were used: NiTi GACR (Control Group), Nitinol Termoactivado 3M UnitekR, Sentalloy GACR, Nitinol Termoactivado TECNIDENTR. 80 mm test bodies were prepared and tested for traction using a Zwick / Roell machine model Z050 8402 with a 50 kN capacity, at a speed of 1 mm/min and at 37 °C. The results show that the higher...
8
artículo
Publicado 2022
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This article seeks to clarify the positive relationship between the inclusion of informal organizations under a registry that allows the collection of property tax in response to assistance in the delivery of proof of possession for access to basic services. The methodology has been carried out under a non-experimental and descriptive investigation, which has shown a lack of state capacities to prevent invasions. In addition, there is a weakness in the tax collection capacity for a private group already titled and registered, so an attempt is made to solve a social problem alleging the need, but without a planned municipal management that can mitigate basic care such as health, safety and others. from effective tax collection. The figure of the passive subject of the property tax is adjusted to a literal interpretation. However, reality shows that there is an important and considerable m...
9
artículo
The investigation that turns up belongs to fellow once was applied and of descriptive level. The region's reader of the teachers of the 3 basic education levels studied understanding herself In her Junín. He used the descriptive method with a descriptive design comparative, one had a 357- subjects sign whom applied a compression test reader once was developed in order to the investigation's properties itself. Aftermaths permitted testing among other things that the basic education level whereon operates the teachers reader does not grant him perks or significant disadvantages in her understanding , likewise than the variables kind , labor situation , institution that I develop his professional studies in and enclosure the postgrade studies , they do not have a distinctive paper in the understanding the teachers's reader.
10
artículo
Publicado 2014
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Historically it was thought that the problem of the production of texts had to do, especially with the correct spelling, limiting it to the correct spelling or handwriting. From textual linguistics , this conception has been overcome , it produce a text implies , first, a purpose, an intention, a verbal reaction or extraverbal what I hope to accomplish , for it is collected words, concepts and all information deemed important to achieve it. Second, contextualization occurs, which is to relate ideas, which should be logical and amount of information necessary and sufficient to enable the property, clarity and relevance of discourse, ie consistency. Furthermore, phrases and properly assemble linguistic constructs to achieve fluidity and avoid redundancy, ie cohesion. Also, we must take into account the speaker, as any communicative act should ensure code level that is accessible to the par...
11
artículo
Publicado 2022
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L Propolis is a product derived from bees and consists of a dark-colored sticky material obtained from different plants and mixed with wax, which is used to protect beehives. It has therapeutic qualities, so the objective of this study was to carry out a bibliographic review of the properties and uses of propolis in dentistry.Methodology: A literature search was carried out on the applications of propolis in dentistry in the databases PubMed, Imbiomed, Medigraphic, SciELO and Google Scholar in the period from March 2010 to March 2020, using the keywords: propolis, characteristics, properties and uses of propolis.Results. Thirty-nine articles reporting results in relation to its properties and uses in dentistry were included. The main properties: antimicrobial, anti-inflammatory, immunomodulatory and healing, basically attributed to the bioactive compound Flavonoids. Propolis is used i...
12
artículo
Publicado 2021
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A study was carried out with the aim of determining the influence of knowledge of intellectual property on the collection of copyright in the city of Tacna. The methodology used is basic, with a non-experimental, cross-sectional and explanatory design aimed at evaluating a sample of 162 users of APDAYC, using the survey technique and the questionnaire as an instrument. The results show a very high level of knowledge of intellectual property for the payment of royalties (89%). The level of copyright collection compliance is high (84%), and they indicate low levels of late payment in addition to payment compliance. The paper concludes that knowledge of intellectual property has a significant influence on copyright collection in the city of Tacna, given the Pearson correlation test, which shows that there is a significant relationship between intellectual property and collection at the 0.01...
13
artículo
Publicado 2021
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Objective. To analyze the psychometric properties of the Zung depression scale in people with HIV in the department of San Martín. Methods. It was a basic and psychometric study, of non-experimental, cross-sectional, and instrumental design; the participants were 203 patients with HIV, of these (24.6% women, 35.5% men; 39.9% LGTBI) of these 56.7% do not know their viral load, and 50.7% do not follow treatment, the instrument applied was the Zung Depression Scale. Results. The items measure the depression variable together, through the CVC congruence of constructs was demonstrated obtaining a coefficient of .98, a bifactor model with adequate adjustment indices was proposed (X2= 273.2; df= 169; CFI= ,917; TLI= ,907; RMSEA=.055 and RMR=.056), similarly the reliability was high (a=.855; b=.869), in terms of normative data through the use of percentiles, measurement values of the scale were...
14
artículo
Publicado 2023
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The biblical story of the Tower of Babel, in addition to teaching us the importance of communication, can teach us how important it is to establish certain basic rules when sharing a space with other people. These basic rules can be seen embodied, contemporarily, in the rules of condominiums.In the article, the authors explore the nature of these regulations, their basic contents and the functions they perform. Mainly, the bylaws serve to reduce transaction costs between the parties involved, so that they can reach agreements that allow coexistence in a scenario of own and common property.
15
artículo
Publicado 2023
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The scientific literature consistently demonstrates the benefits for physical and mental health obtained from activities in natural environments instead of urban ones. Such is the case of surfing, a sport practiced in contact with nature. This study uses the psychological needs theory from self-determination theory (Ryan & Deci, 2017) to explain why surfing is so beneficial. This study investigated the relationship between contact with nature, basic psychological needs (satisfaction and frustration), vitality, and negative affect in 236 amateur athletes of various surfing modalities (bodyboard, longboard, surfing, paddleboard, and bodysurf). The examination of the psychometric properties of the instruments showed adequate evidence of validity and reliability. Results from path analysis showed that contact with nature was associated with greater vitality and lower negative affect —t...
16
artículo
Publicado 2023
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The scientific literature consistently demonstrates the benefits for physical and mental health obtained from activities in natural environments instead of urban ones. Such is the case of surfing, a sport practiced in contact with nature. This study uses the psychological needs theory from self-determination theory (Ryan & Deci, 2017) to explain why surfing is so beneficial. This study investigated the relationship between contact with nature, basic psychological needs (satisfaction and frustration), vitality, and negative affect in 236 amateur athletes of various surfing modalities (bodyboard, longboard, surfing, paddleboard, and bodysurf). The examination of the psychometric properties of the instruments showed adequate evidence of validity and reliability. Results from path analysis showed that contact with nature was associated with greater vitality and lower negative affect —t...
17
artículo
Publicado 2018
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This research work aims to analyze the psychometric properties of the Basic Psychological Needs Satisfaction and Frustration Scale (BPNSFS) -autonomy, competence and relatedness- identified by the self-determination theory (Deci & Ryan, 2000b), in a sample of 297 university students from different faculties and programs belonging to a Chilean university. To achieve the objective, through a psychometric study by confirmatory procedures, a confirmatory factor analysis (CFA) was performed, analyzing the six-factor proposal developed by Chen et al. (2015), and the internal consistency of the scale was evaluated using the ordinal Alpha. The outcomes obtained from the sample of university students indicate a good internal consistency, Alpha = 0.90 and 0.86 for psychological needs satisfaction and frustration. Besides, the outcomes of the confirmatory factor analysis showed an adequate fit ...
18
artículo
Publicado 2018
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This research work aims to analyze the psychometric properties of the Basic Psychological Needs Satisfaction and Frustration Scale (BPNSFS) -autonomy, competence and relatedness- identified by the self-determination theory (Deci & Ryan, 2000b), in a sample of 297 university students from different faculties and programs belonging to a Chilean university. To achieve the objective, through a psychometric study by confirmatory procedures, a confirmatory factor analysis (CFA) was performed, analyzing the six-factor proposal developed by Chen et al. (2015), and the internal consistency of the scale was evaluated using the ordinal Alpha. The outcomes obtained from the sample of university students indicate a good internal consistency, Alpha = 0.90 and 0.86 for psychological needs satisfaction and frustration. Besides, the outcomes of the confirmatory factor analysis showed an adequate fit ...
19
artículo
Publicado 2024
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La capacidad de retención de agua del suelo en el punto de marchitamiento permanente es fundamental para el estrés hídrico de las plantas en un tipo de suelo específico. Este estudio se llevó a cabo para formular un modelo de regresión o ecuación para predecir los puntos de marchitamiento permanente (PWP) de los suelos en un Alfisol típico de origen complejo basal en la Granja de Enseñanza e Investigación de la Universidad de Ilorin. Se recogió un total de cuarenta y cinco (45) muestras de suelos alterados y cuarenta y cinco (45) no alterados a lo largo de una toposequencia (pendiente superior, media e inferior) a 3 profundidades: 0 cm - 30 cm, 30 cm - 60 cm, y 60 cm - 90 cm. Las propiedades del suelo de las muestras perturbadas y no perturbadas se determinaron utilizando métodos experimentales básicos y/o se calcularon utilizando técnicas acreditadas. Las propiedades del s...
20
artículo
Publicado 2025
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La rizósfera es el hábitat de las raíces. Así, se espera que las propiedades del suelo rizosférico estén más estrechamente relacionadas con la producción de plantas. En última instancia, el uso sostenible de recursos naturales, el suministro alimenticio para la sociedad y la ecología de la superficie terrestre son afectados. Esta hipótesis ha sido principalmente evaluada con propiedades individuales de combinaciones suelo-elemento-planta específicas, pero no globalmente. El objetivo de esta investigación fue determinar si las propiedades químicas del suelo rizosférico estaban mas íntimamente asociadas con el crecimiento y nutrición mineral de plantas que aquellas del suelo no rizosférico. Para ello, se compararon relaciones lineales entre variables de suelo y planta para ambos tipos de suelo. Muestras de los 2 tipos de suelo se tomaron en un campo de maíz (Zea mays L.)...
