This paper introduces a study on calculation of surface roughness when external plunge centerless grinding. In the study, based on the theory of grinding process, the relationship between the surface roughness and the grinding process parameters including the grinding wheel parameters, the workpiece parameters and so on was taken into account. The results of the surface roughness when external plunge centerless grinding are in agreement with the experimental data. Therefore, they can be used for prediction of the surface roughness in practice.

Despite of extensive literature on modeling non-stationary economic time series, a controversial and rarely discussed topic is how to interpret and analyze time series whose behavior can be well approximated by means of integrated processes I(1) but are ‘limited’ in the sense that their range is constrained in some ways, which are called ‘bounded time series’. So far, very little work has been undertaken to develop unit root tests which can be applied to bounded time series. it is noted that there are three methods of estimation the test statistics of unit root in bounded AR models which are ordinary least squares (OLS), generalized least squares (GLS), and maximum likelihood (ML). A review of the unit root tests in bounded AR models with these methods of estimation are presented here.

Background: In this study, we aimed to investigate the protective effect of dexmedetomidine on nephrotoxicity and the mechanism of renoprotection following vancomycin-induced nephrotoxicity in rats.\nMethods: Thirty-two albino Wistar rats were divided into four groups of equal sizes. Group C received intraperitoneal (IP) physiological saline solution, Group V received IP 200 mg k-1 vancomycin, Group D received IP 5 µg k-1 dexmedetomidine, and Group V+D received IP 200 mg k-1 vancomycin followed by IP 5 µg k-1 dexmedetomidine 20 minutes after the vancomycin injection. All injections were given every 12 hours apart, for seven days. The renal tissue samples were examined histopathologically. The serum levels of the BUN, Cr, ET-1, NO, TAS, and TOS were evaluated.\nResults: BUN level was significantly higher in Group V compared to the other groups (p<0.05). Cr levels were significantly higher in Group V and Group V+D compared to Group C (p<0.05). The ET-1 level was significantly higher in Group V compared to the other groups (Group V = 244.87 ± 13.3, Group C = 205.04 ± 3.2, Group D = 194.40 ± 7.5, and Group V+D = 231.90 ± 8.6). NO levels were statistically lower in Group V and Group V+D compared to Group C and Group D. Histopathologic assessment revealed that Grade 3 damage was significantly higher in Group V (n = 4) compared to Group V+D (n = 0).\nConclusions: It was determined that vancomycin could stimulate vasoconstrictive mechanisms and inhibit vasodilator mediators, thus causing renal damage. It was also determined that dexmedetomidine, in the dosage applied in the study, can create the opposite effect and reduce the extent of the damage.

In this study, the effectiveness of combining various biotechnical methods with thymol was investigated in against varroa destructor mite during late summer. Experimental colonies were randomly selected, and six study groups were formed with nine colonies in each group. Experimental colonies were created as follows: colonies of renewed queen bees (RQ); colonies in which the queen is trapped on one comb, but worker bees can come and go to carry out their duties (CT); colonies in which ten grams of powdered thymol was added to 90 g of the bee cake, and 100 g of the bee cake with thymol was applied to the colonies (TY); colonies in which the requeen method plus the thymol method were used (RQ+TY); colonies in which the comb trapping method plus the thymol method were used (CT+TY); and untreated control colonies (CC). During the late summer period, the mite infestation level, the sealed brood areas, the bee population, and the effectiveness of applications were determined in the groups. The efficacy of the requeen, the comb trapping, the thymol, the requeen plus thymol, and comb trapping plus thymol methods against Varroa destructor infestation were 40.23%, 39.76%, 80.45%, 98.28%, and 97.93%, respectively.

Inspired by certain recent extensions of the gamma, beta and\nGauss hypergeometric matrix functions, we derive various properties\nof the extended Gauss hypergeometric matrix function (EGHMF) such\nas generating functions and integral representations. The results pre-\nsented here are of general character and can yield a number of known\nand new results in the theory of generating functions and integral\nformulas.

It weighs on the black population a social situation that defines and demarcates the invisibility, as well as predisposition to certain pathologies and aggravations. A number of factors are linked to this greater predisposition, and the programmatic nature of vulnerability is something to be studied and elucidated. In this perspective, this study aimed to track breast cancer among black quilombola women, as well as evaluate the assistance provided in primary health care. Descriptive, cross-sectional study conducted in the south central region of the State of Piauí, northeastern Brazil, with women from four quilombola communities in the year 2017. Participants were asked about social, demographic and health related information. Mammography was also performed. Regarding the clinical characteristics and anthropometric profile of the quilombola women, 47.7% reported never having had an examination, 16.3% reported feeling pain in the breasts and 6.2% reported having observed fluid leaving the breasts, 7.7% were smokers, and 30.8%, former smokers and 12.3% were alcoholic. The results of the anthropometric evaluation by the Body Mass Index showed a high percentage of women with low weight (60%). Regarding the results of the mammography, 92.4% of the women evaluated presented normal results, and 7.6%, with benign findings. Data related to the assistance received from the Family Health Strategy revealed that 53.8% of the participants use the health center, while 46.2% use or do not use this service. It was verified that the assistance carried out by the Family Health Strategy needs to be intensified in order to create and strengthen its references to the quilombola community.

ln this paper, shifted Legendre type matrix polynomials of arbitrary\n(fractional) orders are introduced, starting from the Rodrigues\nmatrix formula. Some properties such as, the recurrence relations,\ndifferential properties, and hypergeometric representation are investigated.

This article discusses the importance of having school leaders who are proficient at the use of achievement data to effect improved student achievement. The article details the variety of achievement data that school leaders should incorporate into their processes for evaluating and effecting instruction in their schools. The article makes the point that effective school leaders do not rely solely on end of year assessment data to make programmatic decisions, but effectively use formative assessment tools to have an immediate impact on classroom instruction and positively influence the outcome of end of year assessment results. Relying on research over the past twenty years, the article discusses how the use of multiple assessment measures ensure that teachers improve instructional quality, provides for early identification of students who are in need of immediate interventions, and assist in careful monitoring that can lead to early identification of students who may be in need of special education intervention.

Objectives: to elaborate an architectural proposal for the improvement of the shelter of the elderly in an ILPI. Method: This is an observational, descriptive study carried out in a Long Stay Institution (ILP) in Teresina, Piauí. Measurement instruments of diameter, length, height and width were used, through a scale with measurement in cm from 0 to 30 meters, besides the aid of a photographic camera. The Constructed Environment Ergonomics Methodology (MEAC) was applied to the physical analysis of the environment. Results: Ergonomic risks were verified, with the need for a greater investment in improvements for environmental comfort, and also that the recommendations of NBR 9050/2005 are taken into account and implemented, especially in Block A and B. Conclusion: According to the results, it is concluded that changes and adaptations are necessary for a better quality of life of the institutionalized elderly. In this way the circulations were resized so that they could be used with maximum comfort, as well as the use of support bars along these routes which provide greater safety for the elderly, facilitating the displacement and agreeing with accessibility.

This article aims to perform a situational diagnosis of Basic Health Units by analyzing their current physical structure and compliance with the parameters of the Universal Design (UD). This is an exploratory, observational and descriptive study carried out at the Basic Health Units of the city of Teresina-Piauí in 2017. The research sample consisted of twenty-three buildings that provide Primary Health Care services. data were collected through on-site visits. There was a prevalence of the classification of projects with residential characteristics (55%). Regarding the evaluation of the access conditions of the individual\'s route, 55%) of the access roads had unevenness in the route. The differences in levels or the combination of the observed differences in combination with other physical barriers hinder the full autonomy of access to basic care services. Thus, it was found that even with the architectural designs and memorials (description of construction procedures and building materials), Universal Design is not contemplated in its entirety.

The rapid development of computing platforms and Internet technologies had a major impact on modern educational systems in universities and scientific institutions that are facing continually new technological challenges. One of the significant learning environment in latest years is the Mobile Learning (M-Learning) system, where is a natural extension of distance education and stepped into the stage of practical application from the academic research rapidly. The evolution toward an advanced M-Learning system is basically based on the performance of the mobile cellular system, and the services associated with Third Generation cellular systems (3G) certainly depend on the performance and behavior of Transmission Control Protocol (TCP) which is the main protocol has the ability to transfer both voice and non-voice data such as downloading information, exchanging e-mail, and instant messaging. Fourth Generation (4G) will be the successor to 3G for M-Learning system when we can improve the performance of TCP to achieve high-speed mobile wireless access with a very high data transmission speed. TCP congestion control mechanism acting a significant role in performance evaluation, in both phases, slow-start and congestion avoidance, and these two phases even work separately, but the combination of them controls the congestion window (cwnd) size and controls the packet injection to the network pipe. This article presents an innovative procedure to starting-up the cwnd in slow-start stage by doubling the window size after each acknowledgment (ACK) received and then approximating the window using a quadratic interpolation formula to touch the maximum window size.