Introduction. The human immunodeficiency virus (HIV) is one that destroys certain cells of the immune system, altering or canceling its function. A CD4 count below 200 cells / mm3 indicates serious damage to the immune system, it is a sign of AIDS in people infected with HIV, considered a public health problem, both because of the impressive morbidity and mortality figures. Objective. To determine the efficacy of Cluster of quadrupe differentiation (CD4) in prognosis of patients with HIV from Teodoro Maldonado Carbo Hospital of the year 2018. Methodology. The research design was quantitative, retrospective, descriptive and transversal. The population was 543 cases and the sample of 100 patients taken from the medical records of the AS400 system of 2018, a data collection sheet was made that consisted of 13 items, was validated by judgments of specialists and health experts qualifying validity, relevance and coherence. Results. Among the most frequent results, 57% met the prognosis in the effectiveness of CD4, male (81%), 25 to 35 years old (30%), Mestizos (81%), from the province of Guayas (85%), active type affiliation (71%), presented complications (73%), tuberculosis (34%), the initial value of CD4 at 3 months was in patients between 200 and 500 cells / mm3 with (51%) , value at 6 months was greater than 500 cells / mm3 with (52%). Conclusion. It was concluded that more than half have CD4 efficacy, however many patients presented complications during treatment.

Introduction: Chronic diseases are long-term illnesses, according to the WHO indicated that 830 women die every day worldwide due to chronic diseases related to pregnancy or childbirth, being considered one of the public health problems. Objective. Identify contraceptive methods as prevention in complications due to chronic diseases associated with pregnancy in patients of the Teodoro Maldonado Carbo Hospital from 2018 - 2019. Method. The design and type of the research was quantitative, retrospective, transversal and descriptive, the population was 83 cases, while the sample was chosen 47 cases of pregnant women with a diagnosis of chronic diseases, between May 2018 to May 2019 As an instrument, a data collection sheet validated by expert judgment was used. Results The most commonly used contraceptive methods were injectable methods (21.3%), pills (14.9%), age range; from 35 to 44 years (46.8%), the level of instruction; secondary (48.9%), ethnic group; mestizo (44.7%), place of residence; Guayaquil (44.7%), Chronic disease, Chronic renal failure on hemodialysis 12.8% as well as chronic arterial hypertension, Frequent pregnancy number; 3rd pregnancy (34%), years of suffering with the clinical condition; 0 to 3 years (63.8%), medical complication; HELLP syndrome (38.3%), use of contraceptive methods recommended by the attending physician; if (27.7%) and not (72.3%). Conclusion. The population studied recognizes that the level of knowledge about contraceptive methods was regular, since many did not apply it and if they used it improperly.

The research synthesizes the results of surveys carried out on a whole segment of commerce in the city of Riobamba, in the research it was developed as a cross-sectional, descriptive and analytical study, it was analyzed to the people who commercialize or produce flower arrangements, that in the city ​​are 53, the objective was to determine if they emerged as entrepreneurship and according to the business turn can be considered as micro-enterprises, at the time prior to the surveys were explained to the unit of study what is a venture and what is a microenterprise, as well as the differences that exist between them, A business arises from the business idea that a person intends to carry out to generate their own income as well as not depend on a third party. Micro, small and medium enterprises are those that generate the highest income for a country, because these businesses have been created according to the entrepreneur's skills, in Among the determinant results of the research, it was determined that the total number of businesses emerged as undertakings, and in addition, 66% of the respondents stated that their businesses could be considered as micro-enterprises.

The feeding of guinea pigs in the growth phase based on tropical grasses was developed on the ESPOCH farms Sede Morona Santiago, for which 20 guinea pigs 60 days old were used, which were distributed in five treatments (Tripsacum laxum, Pennisetum sp, Pennisetum purpureum and Axonopus scoparius) including the control and four repetitions, each experimental unit was made up of one animal, which had an average weight of 409.6 g. to which they were randomly housed in an individual metabolic cage to observe the productive behavior and use of the pasture, and to assign the treatments at random to each guinea pig. Dehydrated feed was supplied daily after recording its weight, in the same way forage residues and excreta were weighed, data that were used for the analysis. Once the information obtained was compiled and processed, it was possible to notice that the weight of the guinea pigs after 60 days of investigation, consumption of dry matter, quantity of feces produced, and dry matter used did not register significant differences, but the use of protein, fat, fiber, Acid Detergent Fiber (FDA) and neutral detergent fiber (FDN) registered statistical differences. Concluding that the balance has a greater amount of protein and fat used, although the fiber content is scarce, in the same way the availability of FDN and FDA in the Tripsacum laxum grass is in a lower proportion when contrasting with the other grasses used in the investigation.

The current article developed a review of the state of the art about the application of Soft Computing techniques in solving planning problems of 5G networks. To achieve this, the different existing Soft Computing techniques were classified (neural networks, fuzzy logic, evolutionary algorithms) and models proposed and methods of solution were considered from works and research developed about the subject according to their authors. Additionally, the most relevant investigations described techniques which are specified to solve problems of architectures and crucial functionalities in the development of this technology, highlighting the following: finding an optimal position for a Base Station (BS) in an area of particular interest, operating in the desired multiple frequency bands while maintaining high gain, limiting power consumption in 5G network infrastructures, and trying to increase quality of service by decreasing the probability of call blocking. To conclude, the most applied Soft Computing techniques in solving planning problems of 5G networks are fuzzy logic, in order to limit the energy consumption in 5G network infrastructures, in addition to artificial neural networks and genetic algorithms for admission of calls in 5G networks, increasing quality of service by reducing interference.

Obtaining data is a fundamental stage in a computer security process both to identify violators or to detect vulnerabilities in a certain system. For tasks such as investigation or intelligence, among the most important information that can be collected from an entity are the IP addresses of important people, suspects or investigation targets. Obtaining this information for legal and ethical purposes is currently more complex because service providers mask this data in order to protect the identity of their users. In order to obtain the IP address, it is intended to apply different electronic and automated techniques that serve to modify documents and cover them up so that, when opened by the recipient, they reveal their IP address, which will be automatically registered in the logs of the web server that is implemented in this research. These approaches will be considered: sending an invitation HTTP link directly and sending an Office document with invisible characters. The scope of the work described is important, since it covers proposed techniques for detecting an IP address using various methods evaluating the efficiency and effectiveness of each test. This will allow the forensic analyst or investigator to obtain a person's possible location by consulting with internet providers.

The objective of this research was to develop the speaking skill in the English language through the use of "Basic Context English" technique in 30 students from 5 to 6 years old at "Luis Humberto Sancho" kindergarten of Riobamba city. For this purpose, an intervention plan was developed and implemented. It contains a set of dynamic recreational activities for students. They were guided by the teacher, considering the dimensions of articulation and pronunciation with basic vocabulary. The research was a quasi-experimental study, where the variables were analyzed without direct intervention  while the data were obtained by the technique of observation. It was applied in two different moments, before  and after the experimentation. For the evaluation, an instrument with a Likert scale was used. It made possible to quantify the obtained data so that it could be interpreted, analyzed and tabulated, and finally submitted to the T-Student test. It concluded that the articulation and pronunciation with basic vocabulary are linked to the learning of English in a playful manner allowing fluency, increase of vocabulary, and an appropriate pronunciation. It means it influenced in the development of speaking skill in the English language.

This article is based on the tax obligations that the taxpayers of MSMEs have, the new tax regime for micro-businesses, created in the Organic Law of Tax Simplification (2019), has its rules for its application. The Internal Revenue Service (SRI) issued a resolution on the cadastre and obligations of these taxpayers, the last one, this past May 22, 2020, where it will proceed to comply with a transitional provision of the law that set a deadline 20 days, from the effective date of the rule, for the SRI to carry out an ex officio update of the Single Taxpayer Registry (RUC) to micro-companies, according to the regulations of the Production Code, micro-businesses are those businesses with sales or gross income annual equal to or less than USD 300,000, the tax administration also includes small merchants, entrepreneurs, in addition to natural persons obliged or not to keep accounting and companies that have had gross income in the immediately preceding year equal to or less than the aforementioned amount , the purpose of this research is to determine what would be the behavior of taxpayers, since they cease to be age Before withholding, and the declarations become semi-annual, what will be the impact, since they have to accumulate semi-annually those resources that they will need to cover the semi-annual VAT obligation, the repercussion deepens even more, how much they have to pay on the total gross sales of 2% imposed on them, without considering the result of the fiscal year. The methodology used in the research was descriptive in the field, based on the bibliographic and documentary review, and the survey technique and the questionnaire instrument, which allowed to review, analyze, diagnose and point out issues related to the application of the law. To calculate the sample size, an objective population of 100 Accountants and Auditors has been used, members of the National Union of Colleges of Accountants of Ecuador (UNACCE), who are labor-related, either in a dependency relationship or by professional services with MSMEs Corresponding to a sample of n = 79 questionnaires, the results undoubtedly show that these taxes would mean a severe blow to the MSMEs economy, especially for microentrepreneurs, small entrepreneurs, and entrepreneurs.

In the present investigation, the main objective was to perform a UV light wavelength control on a prototype, analyzing its optics, the reference of which is the Perkin Elmer 781 spectrophotometer, used in decontamination analysis of surfactant and photodegradation waters, to which the generator has been redesigned, determining the frequency range, reducing the environmental impact, through the implementation of HMI, whose applied methodology, to carry out the automation process whose application approach is determined through the graduation and decontamination photo of the water, presenting a redesign for the generation of UV wavelengths within the electrical and electronic part through Newton's interpolation, reducing the error to 0.05% least squares of 3.32%, optimizing the control of motors with an HMI connection, using which the generated wavelength is visualized facilitating the navigation and the control of the motors granting to the operator direct interaction with the equipment, obtaining as a result the improvement of the original system, varying the sensors and actuators to obtain wavelengths from 500 nm to 700 nm, which allows work to be carried out on the decontamination of water and the effectiveness of the system.

The investigation determines a ventilation system for interior mine works in the company PRODUMIN S.A.; The methodology used is to collect data in the field of factors such as: temperature variations, permanent gas emission by blasting and also that established by the machinery. The ranges of dust generation and excess humidity that intervene create unsafe conditions in a work environment, in the same way the deficiency in the operational performance, technical data that was considered with respect to the parameters of the new exploitation front, such as: section of the gallery, machinery to be used, length of the front run and geometry of the mining tasks to be carried out in the new production block. This allows stipulating the most convenient conditions in the area of ​​mining safety of an induced ventilation system compared to the traditionally used ventilation method, and proposing a mixed impeller-aspirating ventilation system with the use of ventilators, extraction turbines and ventilation sleeves.

The objective was to conduct the study and analysis of the quality of service in digital transmission through the use of codecs in USRP. The development methodology defines the realization of the prototype for transmission and reception, starting with the selection of devices, the design, execution, and analysis of the results obtained.  It was made the study of the particular conditions in the transmission and reception of the signal in digital AM (DRM), the implementation of the transmitter in GNU Radio, the configuration of the receiver in HDSDR and Dream SDR. In addition to the cards Ettus USRP N210, Ettus USRP B200, and RTL-SDR REALTEK RTL2832U. The result of this study was the quality of the service evaluated with respect to the transmission speed (Kbps) and the signal-to-noise ratio (SNR) to determine the fidelity in the reception of digital signals. Based on the results defined in the operating characteristics of each mode of robustness for a given transmission channel vary the values of the transmission speed and the signal-to-noise ratio, offering B mode better signal protection with respect to noise, while A mode offers higher transmission speed. Therefore, it is concluded that the DRM system uses the best sound compression technologies since it uses the MPEG-4 audio and voice algorithms that provide excellent sound quality at low bit rates with advanced audio coding (AAC).